Water ring vacuum pump work flow

The main working parts of water ring vacuum pump body are moving shaft and impeller. The device rotates at a high speed. When centrifugal force is generated inside the device, the working liquid stored inside the device will be continuously thrown to the inner wall. Under the action of uniform centrifugal force, a water ring section with a closed shape and consistent thickness is formed inside the pump body.
The upper part of the closed water ring is strictly required to keep tangential with the hub of the impeller, while the lower part of the closed water ring should be in contact with the tip of the blade. When the position state of the upper and lower parts remains normal, a crescent space will be formed. The space part is divided into two parts of the impeller and the blade, forming a number of Chambers of different sizes. In the installation process of the vacuum pump impeller part, in order to ensure the normal working state, it is necessary to carry out an angular deflection, but also to set a difference speed between the rotation speed of the water ring and the rotation speed of the impeller, to ensure that there is a speed difference between the two, so that the relative movement between the water ring and the impeller blade. As the impeller rotates, a closed space is formed between the water ring and the blade. The longer the rotation, the larger the enclosed space, the lower the internal pressure, the lower the internal air pressure. In order to keep the air pressure stable, the air suction hole begins to form gas suction action continuously until the air pressure of the two parts is the same. When the closed space is connected with the exhaust hole and the pressure is higher than the exhaust hole, the gas is continuously discharged, so the cycle, the suction port will form a certain degree of vacuum, so as to meet the work requirements.
In the whole working process, due to the mechanical movement work constantly produce new heat, and constantly from the external air absorption medium also exist heat, resulting in the vacuum pump temperature rising. In order to ensure that the internal air temperature can be maintained in a stable state to maintain the normal operation of the machine, it is necessary to constantly supply water and supplement the cooling liquid, to ensure that the overall working state of the machine to reach the normal level.
Two Stage Liquid Ring Compressor

vacuum pump for pharmaceutical 

What is the main function of vacuum pump in vacuum system

This paper briefly introduces the working principle, classification, main structure and layout requirements of vacuum pump, and the necessity of the application of vacuum pump in vacuum booster system. Generally speaking, there is a large range from the atmosphere to the extremely high vacuum, and so far no vacuum system can cover this range.
Because the performance of all kinds of vacuum pumps can meet the common point of vacuuming the container, there are still differences. Therefore, it is very important to make clear the work tasks of the pump in the vacuum system when selecting the pump. The functions of the pump in various work fields can be summarized as follows:
1. Main pump the so-called main pump is to directly vacuum the vacuum vessel of the vacuum system to obtain the vacuum pump required by the process requirements.
2, rough pumping pump refers to the vacuum pump from the atmospheric pressure to reduce the vacuum system pressure to another pumping system can start to work.
Front stage pump front stage pump is a vacuum pump used to maintain the pressure of the front stage of another pump below its maximum permitted pressure of the front stage.
Maintenance pump maintenance pump is when the vacuum system is very small, can not effectively use the main front pump. For this purpose, an auxiliary front stage pump with a lower pumping speed is provided in the vacuum system to maintain the normal operation of the main pump or to maintain the low pressure vacuum pump required for the evacuated container.
5, crude vacuum pump or low vacuum pump crude, low vacuum pump refers to starting from the atmosphere, reduce the pressure of the pumping container after the work in the low vacuum or crude vacuum pressure range of vacuum pump.
High vacuum pump high vacuum pump refers to the vacuum pump working in the high vacuum range.
Ultra high vacuum pump refers to the vacuum pump operating in the ultra high vacuum range.
Booster pump booster pump usually refers to the work between the low vacuum pump and the high vacuum pump, in order to improve the pumping system in the middle pressure range or reduce the pumping rate of the front stage pump vacuum pump requirements.
plastic vacuum pump

vacuum pump conveying grains 

Four suggestions for liquid ring vacuum pump selection

1, liquid ring vacuum pump should try to choose a lower speed of the specification
At present, the application of liquid ring vacuum pump is at most 2 bv series, belongs to the axial suction exhaust single-acting pumps, for the same specifications have multiple speed to choose, when the inlet pressure 200 hPa and 600 hPa, exhaust pressure of 800 hPa and 1013 hPa, the impeller blades of cylindrical linear velocity for 14 ~ 17 m/s, so because of the large impeller diameter of pump speed of large size is low, so under the premise of same swept volume, should choose as far as possible speed lower pump, large pump than smaller power consumption, high efficiency.
In addition, the larger size of the liquid ring vacuum pump is due to the blade length is the flow channel length, the curvature of the fluid is small, the flow line is approximately straight, the flow of the fluid is close to the slow variable flow, the flow of the secondary eddy and boundary layer caused by the fluid flow energy loss is also small.
2, liquid ring vacuum pump should consider the influence of water temperature
At home and abroad because of the liquid ring vacuum pump performance curve on the technical documents and technical data are based on the premise of inlet water temperature of 15 ℃, the front has also introduced the water temperature below 15 ℃ or higher than the temperature influence coefficient calculation formula of gas.
Therefore, the influence of actual water temperature on gas volume should be fully considered when selecting liquid ring vacuum pump. Because our country most users added water temperature is between 25 ℃ and 35 ℃. Therefore, the selection of pump than the technical documents on the appropriate increase in gas volume.
3. Influence of suction resistance of liquid ring vacuum pump
Because of gas suction location often below the bleak look-out, liquid ring vacuum pump is far away, thousands of meters) of (some coal mines in suction pipe line is too long, therefore, inspiratory resistance loss should be considered, and the coal mine system by using the formula for calculating the suction resistance is calculated, the coarser should be adopted when arranging pipeline suction pipe, reducing the loss of resistance, and try to reduce the right-angle bend, in order to achieve the purpose of improving the efficiency of inspiratory.
4, liquid ring vacuum pump exhaust with micro positive pressure when the selection
At present, some coal mines need to discharge the extracted gas to a distant place or compress it into the gas storage tank, and the exhaust pressure is generally between 0.02-0.05mpa ·G. Since the performance curves and technical data in the technical documents of the liquid ring vacuum pump are all obtained under the exhaust pressure of 1 standard atmosphere, the influence of the rising exhaust pressure and the increase of the backflow inside the pump chamber on the amount of exhaust gas should be considered in the selection of the model.
In addition, as the exhaust pressure increases, the shaft power of the pump increases, the power of the matching driver should also increase, in this case, the manufacturer should provide the test performance curve and corresponding technical data in the selection, in order to fully meet the requirements of the user.
Complete line of Roots vacuum pumps

Two-stage vacuum pump 

What is the core of water ring vacuum pump?

Water ring vacuum pumps were originally used as self-priming pumps. It is composed of impeller, pump body, suction and exhaust plate, water ring formed in pump body wall, suction port, exhaust port, auxiliary exhaust valve and so on.
In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, water ring pump is widely used. Due to the rapid development of vacuum application technology, water ring pump has been paid more attention to in crude vacuum. As the water ring pump gas compression is isothermal, it can be removed flammable, explosive gas, in addition to the extraction of dust, water containing gas, therefore, water ring pump applications are increasing.
The pump body is provided with an appropriate amount of water as the working fluid. When the impeller rotates clockwise in the figure, water is thrown around by the impeller. Due to the effect of centrifugal force, water forms a closed ring of approximately equal thickness depending on the shape of the pump chamber. The inner surface of the lower part of the water ring is just tangent to the hub of the impeller, and the inner surface of the upper part of the water ring is just in contact with the tip of the blade (in fact, the blade has a certain insertion depth in the water ring). At this time, a crescent shaped space is formed between the hub of the impeller and the water ring, and this space is divided into several small cavities equal to the number of blades by the impeller. If the bottom of the impeller 0 ° as starting point, so in front of the rotating impeller 180 ° when small cavity volume changes from small to big, and with suction mouth on the face, the gas is inhaled, when the suction at the end of the small cavity is isolated from the rest of inspiratory mouth; When the impeller continues to rotate, the small cavity changes from large to small, so that the gas is compressed. When the chamber is connected with the vent, the gas is discharged from the pump.
To sum up, water ring pump is to achieve suction, compression and exhaust by the change of pump chamber volume, so it belongs to the variable volume vacuum pump.
The impeller is mounted eccentrically in the pump body. When the impeller rotates, the water entering the pump body is thrown around by the impeller. Due to the effect of centrifugal force, the water forms a closed water ring of equal thickness similar to the shape of the pump chamber. The inner surface of the upper part of the water ring is just tangent to the hub of the impeller, and the inner surface of the lower part of the water ring is just in contact with the tip of the blade. At this time, a crescent space is formed between the hub and the water ring of the impeller, and this space is divided into several small cavities equal to the number of blades by the impeller. If the upper part of the impeller 0 ° as starting point, and then in front of the rotating impeller, 180 °, the small cavity volume gradually changed from small to big, the pressure reduced constantly, and the mines with suction mouth of the suction or discharge tray, when the pressure inside the small cavity space is less than the pressure of the pump container, according to the principle of balance of gas pressure, the gas is pumped continues to be draw in small cavity, is in the process of suction. Breathe when complete with inspiratory mouth isolation, from Ⅱ - Ⅱ to Ⅲ - Ⅲ section, the volume of the small cavity is gradually decreases, and the pressure increases continually, at this time is in the compression process, when it comes to an exhaust pressure of compressed gas in advance, forward from the auxiliary exhaust valve exhaust. From the section Ⅲ - Ⅲ to Ⅰ - Ⅰ, interlinked with vent small cavity volume further decrease the pressure rise further, when the gas pressure is greater than the exhaust pressure, the compressed air to escape from the vent is in the process of the continuous operation of the pump, continuously carrying on the suction, compression, exhaust process, so as to achieve the purpose of continuous extraction.
Two-stage liquid ring vacuum pump

Single stage liquid ring vacuum pump 

Application of vacuum pump in coating industry

Vacuum coating technology is an important branch of vacuum application technology. It has been widely used in optics, electronics, energy development, physical and chemical instruments, construction machinery, packaging, civil products, surface science and scientific research and other fields. Vacuum coating mainly includes evaporation plating, sputtering plating, ion plating, beam deposition and molecular beam epitaxy. Chemical vapor deposition is also available. If the purpose of vacuum coating is to change the physical and chemical properties of the material surface, this technology is an important part of the vacuum surface treatment technology, and its classification is shown in table 6. This paper gives a brief introduction to its main applications. First in optics, an optical glass or quartz surface coated with a layer or several layers of different substances of the film, can become a high reflection or no reflection (that is, anti-reflection film) or any expected proportion of reflection or transmission materials, can also be made to one wavelength of absorption, but another wavelength of transmission of the color filter. High reflection film from large aperture telescopes and a variety of lasers, all the way to the new building's large window coating jasmine, are in great demand. Anti-reflection film is a large number of cameras and a variety of lasers began, all the way to the new building's large window coating glass, are very needed. Antireflection film is widely used in the lens of cameras and television cameras. Vacuum coating plays an important role in electronics. Inheritance circuits of all sizes. Include memory, arithmetic implement, tell logic element to want to use conductive film, dielectric film and protective film. Chromium film is used as a mask for preparing circuits. Magnetic tape, disk, semiconductor lasers, Josephson devices, charge-coupled devices (CCD) are also channels of various films. In terms of display devices, video head, high-density video tape, transparent conductive film of plane display device, optical conductive film of camera tube and aluminum lining of display tube fluorescent screen are also prepared by vacuum coating method. In terms of components, evaporation of ni-cr in vacuum, chromium or cermet can make resistance, evaporation of aluminum, silicon monoxide and titanium dioxide on plastic can make capacitors, evaporation of selenium can get toner for electrostatic copier, evaporation of barium titanate can make magnetostrictive sound components, etc. Vacuum evaporation can also be used to fabricate superconducting films and microbead coatings for inertial confinement reactions. In addition, it can also be used to steam decorative film such as jewelry, watch shell surface, textile metal pattern, gold and silver wire wire, and use sputtering or ion plating on knives, molds and other manufacturing superhard film. In the past two years the rise of multi-arc ion plating prepared titanium products, such as stainless steel sheet, mirror plate, column, handrail, high-grade bed bracket, stair railing, etc. Is currently prevalent.
dry scroll vacuum pump

vacuum pump for sale 

Water ring vacuum pumps of classification

As there are many types of water ring vacuum pumps, they can BE divided into 2BA type water ring vacuum pump, BE type water ring vacuum pump and SK type water ring vacuum pump according to the level of the ultimate vacuum degree and the amount of air extraction. The main characteristics and overview of these types are as follows:
Type 1, BA
Model 2BA water ring vacuum pump is suitable for the extraction of gas and water vapor, suction pressure up to 33mbar absolute pressure (97% vacuum). When transformer oil is used as working liquid (called oil ring vacuum pump), the suction pressure can reach 6.7mbar absolute pressure (99.3% vacuum degree), which can completely replace reciprocating vacuum pump. When the liquid ring vacuum pump works for a long time under the limit vacuum suction pressure, the cavitation protection pipe should be connected to protect the pump and eliminate cavitation sound. When used as a compressor, the maximum pressure is 0.26mpa (absolute pressure). When used as a compressor, the 2BV pump power will be increased with the increase of exhaust pressure. Please note the exhaust pressure to select the appropriate motor power when ordering.
2, BE
Model 2BE water-ring vacuum pump and compressor are developed by our company on the basis of many years of scientific research achievements and production experience, combined with the international advanced technology of similar products. The high-efficiency and energy-saving products are usually used for pumping the non-solid particles, insoluble in water and non-corrosive gas, so as to form the vacuum and pressure in the closed container. By changing the resulting material, it can also be used to pump corrosive gases or work with corrosive liquids. 2BE water ring vacuum pump is widely used in papermaking, chemical, petrochemical, light industry, pharmaceutical, food, metallurgy, building materials, stone tools, coal washing, mineral processing, fertilizer and other industries.
3, SK
SK type water ring vacuum pump and compressor are used to pump or pressure air and other non-corrosive, insoluble in water, do not contain solid particles of gas, in order to form vacuum and pressure in the closed container, to meet the requirements of the process. A suction or pressure gas may be mixed with a small amount of liquid.
SK water ring vacuum pump and compressor are widely used in machinery, petrochemical, pharmaceutical, food, sugar industry and electronic fields. In the process of work, the compression process of gas is isothermal, so in the compression and suction of explosive gas, it is not prone to danger, so it is more widely used. The operating vacuum range is 0.03-0.08mpa.
The above three types of water ring vacuum pumps have their own characteristics and can be used in different fields. I believe that with the continuous progress of science and technology, there will be more production processes and more diversified products.
Rotary vane vacuum mechincal pump

Water ring vacuum pump for sale 

Liquid ring compressors

Operating principle of rotary vane vacuum pump

1, 2X series rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. Rotary vane vacuum pump for small and medium-sized pump. Rotary vane vacuum pump has a single and two - stage two. The so-called two-stage, is in the structure of the two single-stage pump in series. Generally made of two - level, in order to obtain a higher vacuum.
2. The relationship between the suction speed and the inlet pressure of the 2X rotary vane vacuum pump is stipulated as follows: under the inlet pressure of 1333Pa, 1.33pa and 1.33 10-1(Pa), the pumping speed shall not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump, respectively.
3, 2X rotary vane vacuum pump (referred to as rotary vane pump) is an oil-sealed mechanical vacuum pump. Its working pressure range is 101325~1.33 10-2(Pa) belongs to the low vacuum pump. It can be used alone, also can be used as other high vacuum pump or ultra - high vacuum pump before pump. It has been widely used in metallurgy, machinery, military, electronics, chemical, light industry, petroleum and medicine and other production and scientific research departments.
4, rotary vane vacuum pump can be removed in the sealed container of dry gas, if attached to the air ballast device, but also can be removed a certain amount of condensable gas. But it is not suitable for the removal of gases containing excessive oxygen, corrosive to metals, chemical reactions to pump oil, and dust particles.
5, 2X vane vacuum pump is mainly composed of pump body, rotor, vane, end cover, spring and so on. A rotor is mounted eccentrically in the chamber of the rotary vane vacuum pump. The outer circle of the rotor is tangent to the inner surface of the vacuum pump chamber (there is a small gap between the two), and two rotary vane with springs are installed in the rotor groove. When rotating, the top of the rotor blade is in contact with the inner wall of the pump chamber by centrifugal force and spring tension, and the rotor rotates to drive the rotor blade to slide along the inner wall of the pump chamber.
6. The two rotors separate the crescent space enclosed by the rotor, the vacuum pump chamber and the two end caps into three parts, A, B and c. when the rotor rotates in the direction of the arrow, the volume of space A connected with the suction port increases gradually and is in the suction process. And the volume of the space C communicated with the exhaust port is gradually reduced and is in the exhaust process. The volume of living space B is also gradually reduced and is in the process of compression. Since the volume of space A is gradually increased (that is, expansion) and the gas pressure is reduced, the external pressure at the entrance of the vacuum pump is greater than the pressure in space A, so the gas is sucked in. When space A is isolated from the intake port, namely, it is transferred to the position of space B, the gas is compressed and the volume is gradually reduced, and finally it is connected with the exhaust port. When the compressed gas exceeds the exhaust pressure, the exhaust valve is pushed open by the compressed gas, and the gas passes through the oil layer in the tank into the atmosphere. By the continuous operation of the pump, achieve the purpose of continuous pumping. If the discharged gas passes through the airway and is transferred to another stage (low vacuum stage), it will be pumped out by the low vacuum stage and then compressed into the atmosphere by the low vacuum stage, forming a two-stage pump. At this time, the total compression ratio is borne by two stages, thus improving the ultimate vacuum.
Liquid ring vacuum compressors for sale

Rotary vane pump for chemicals 

Rotary vane vacuum pump structure

Rotary vane vacuum pump structure

Rotary vane vacuum pump structure

Rotary vane vacuum pump structure

Rotary vane vacuum pump structure

Rotary vane vacuum pump structure

Rotary vane vacuum pump of assembly

Water ring vacuum pump main pump selection scheme

The importance of water ring vacuum pump scheme design in the development of water ring vacuum pump units is emphasized. The importance of process reengineering and optimization in the scheme design of water ring vacuum pump units is emphasized. This paper focuses on the steps of reengineering the design process of vacuum units. Theoretical basis of business process reengineering concept, at the same time, the implementation method carried on the deep into the research purpose is to systematically predecessors' experience and results of the implementation of process reengineering for vacuum unit guide design process reengineering theory is very important in the design process of vacuum unit but experienced technicians often can draw on experience rapid preliminary work out one or more basic applicable scheme so this topic is mainly to adopt RBR to selected unit at the core of a vacuum to obtain equipment with CBR modelled on the previous order to perfect a complete set of units and then a complete set of this design The process is included in the instance library as a case for future repair and reuse. Show the significance of this system to the actual production of enterprises.
At the same time, this paper elaborates on the deficiencies in the research of intelligent design, especially in the case based mechanism of the system. Finally, the application of intelligent design in enterprises in the future is prospected. Configuration and selection of related components of vacuum unit system: after the preliminary determination of vacuum equipment, the recommended matching motor for each single pump will be equipped; Some special vacuum pumps also need to be equipped with special supporting equipment, such as air cooling pump equipped with heat exchanger, condenser equipped with water ring pump separator, etc. According to the diameter of the inlet and outlet and the external dimension of each vacuum pump, the suitable connecting pipe is selected. Provide flanges and valves for pipes; Install vacuum meters, thermometers and other measuring devices in key positions; Equipped with electric control cabinet for the whole unit; According to the position of each component to set up the frame. Through the study on enterprise's design process of vacuum unit in detailed analysis we obtain the basic knowledge of the design process and design of logic and won several key elements such as very empirical design principles and on the basis of some have some definite formula theorem in a vacuum, there are detailed in the technical data indicate or are prescribed in the national standard, industry standard and is deep design engineer experience.
Select vacuum pump according to pumping speed

Liquid ring vacuum pump compressor 

Water ring vacuum pump for vacuum transport features

Water ring vacuum pump has the characteristics of vacuum transportation: compact structure, reliable balance and uniform flow. In chemical production, it is often used to transport or pump inflammable, explosive and corrosive gases. Water ring vacuum pump because impeller mixing liquid, loss of energy, so its efficiency is very low.
Vacuum pump is widely used, can be used in petroleum, chemical industry, machinery, mining and many other industrial sectors, it can also be used for conveying vacuum, I do not know if you know its characteristics of conveying vacuum, the following is to introduce the characteristics of vacuum pump for vacuum transport:
1, high efficiency, equipment no return transport, other means of transport are free to return the defect of the wrist, and the transport medium is air, only in the terminal into the atmosphere, in the process of transport, the inlet can be continuous feeding, complete continuous transport.
2, the equipment has simple structure, manufacture, processing, equipment match bento, control costs, less set up time is short, the main form of vacuum pump system local are steel plate welding structure, composed of pipe, tank shape of components, the relative movement between components, easy maintenance operations are compared, if adding some control equipment, it is easy to complete automation.
3, recommended pipeline, easy to tailor to set up the network, layout cumbersome and sensitive, can be full of application field air product, easy to comply with the operating environment.
4, labor health condition is good, when the vacuum pump material in the tube, the tube is in negative pressure, the dust will not leak float in the sky, not the flying environment, or stained with dust in the process of walking, can also stop the sorting, boring and other intermediate disposal, such as material walks under negative pressure, due to the moisture to evaporate easily under negative pressure, so, even if do not use other boring wrist, high moisture materials in the process of walking, will also get some boring, application grain weight of different materials, and design appropriate allow for material handling material separation.
Vacuum pump recommended high efficiency, simple structure, easy to operate, and good labor hygiene, very suitable for the transmission of vacuum, for the above introduction hope to help you, today's introduction to this.

Vacuum Pump For Vacuum Drying Oven?
Roots blower for sewage treatment
Liquid Ring Vacuum Pump

Roots blowers 

Reveal 7 days fast ranking SEO operation plan

A lot of people when doing the SEO is to do something irrelevant, when if it is a professional SEO optimized website is based optimization, pay attention to the requirements of the web site baidu is the basis for optimization of part of the other all by users to click on, if the website first ranking is bad that we should start from their own small details, so we must do foundation to optimize well, how to transform a word before the optimization to the industry area of 20, said today is about fast ranking based optimization.

Reveal 7 days fast ranking SEO operation plan

I. originality of the article
How important the original article, for new sites that is original first dozens of article, wait you of website have rankings can copy and paste some streamlined content, because it was early to copy and paste, included the site's ranking is not good, if you have the confidence to say after the site can attract a lot of traffic then you can copy it.
1. Modify the title and content of the article not included, try to write some users like to search the content, you can refer to baidu know the content in the form of questions and answers.
Reveal 7 days fast ranking SEO operation plan
Baidu knows
3. Modify and add the ALT attribute of the images in the article. If no ALT attribute is added, the image title related to the image and content should be added.
4. Articles should be differentiated from others.
5, the content of the article keyword to contain other articles on the site similar to the title.
Two, article title specification
Article title is to attract others to click on the first element of the site, the site title can be users like to search the content, can also be to attract the attention of the title, in short, can let others click on your site.
1, if it is copied from other people's articles must be original degree, so as to ensure that included by others to search.
2, the key words of the article, the key words of the article on the left more important weight, if you want to put a keyword ranking words can be optimized in front of the word.
3, the title of the article should not be too long, simple and clear, control in about 15 words, too long after the collection is not easy to show.
4, the advantage of double title, the advantage of double title is to solve the user's one problem, but also solve the user's other problems.
Reveal 7 days fast ranking SEO operation plan
5, the content of the article with pictures is to let users feel more need to see things to read, baidu can better identify the article and others are not the same.
Three, page keywords selection specifications
Page keywords layout is to let users more intuitive to find the content they want, of course, is also convenient to search engines to better crawl your website.
1, the key words of the page is the site content keywords to add anchor text, anchor text to add is some of the station title added to this article.
2, page keywords can be included in the title of the article can also be in the content, can be recognized by the search engine.
3, according to the user like to search in the content to add some keywords, these are the reference baidu related search and pull down to find.
Reveal 7 days fast ranking SEO operation plan
4, the layout of the page must be reasonable typesetting, each paragraph of the article should be reasonable and orderly, opening words to have the H tag.
Fourth, the article abstract specification
Abstract appears at the top of the article, is used to describe the general meaning of the article, if not written in the abstract will also affect the effect of the whole article.
Reveal 7 days fast ranking SEO operation plan
1, the keywords of the article as far as possible to reflect some of the key words need to do, it is best to do the key words of the relevant long tail words also reflected in the article, in order to make baidu search engine included collection to recognize the user search words.
2, the content of the article as far as possible to appear some questions related to the long tail words, such as :" immigration ", immigration Canada needs what conditions, immigration Canada needs what requirements, such as the content of the first pass, there are some about immigration Canada need how much money, what matters need to pay attention to.
3, the abstract of the article does not have too many requirements, generally in 20-50 words, too many words appear on the article is not uniform.
4. The abstract of the article mainly explains the general meaning of the main content of the article, so as to guide users to read on.
5, the content of the article should not be too long, as long as the point of interest on the line.
Five, text specification
Text specification is the main content of the article and the title of the unified code marked accurately, the user looks comfortable, search engine is more convenient when grabbing.
1, the first paragraph of the article to appear is the need to do the keywords, although now as long as there can be shown, but need to add some attract users.
2, the end of the article should also appear some anchor text keywords, it is best to add some users often pay attention to and attract the article.
3, the page of the keywords to add mainly some of the anchor text about the title of other articles, in general, as long as the user can guide the click can be added, but added in order.
4, the page of keywords to be added to the keywords together, do not use the wrong word and irrelevant title anchor text.
Vi. Picture specification
The specification of the image is to add ALT attributes, so that baidu better to identify the image, and the keyword is related to the article keywords.
Reveal 7 days fast ranking SEO operation plan
1. The title of the uploaded picture should be related to the content on the picture, or the content of the article, and the page keywords should be included as much as possible.
2, try to add some pictures below the article description of the picture, if necessary, you can add some links to other articles.
3, if there is a combination of words and pictures try not to put the picture at the beginning of the place, the picture is added to the end.
Vii. Construction of internal and external links
The addition of the internal chain is to let the search engine to better continue to crawl the content of the site, the longer the spider stay in the site, the more you like the article, also can increase the article included. The external chain is mainly to lead the flow is a piece, now the external chain or can be added, but now the weight of the external chain transfer is not very high, I in the process of optimization is never sent outside the chain because I have to guide the user's search method.

Roots blower installation and disassembly

The rotary vane vacuum pump operates in high temperature to deal with faults

Rotary vane vacuum pump is a device that can generate, maintain and improve vacuum in a certain space through various ways. It is mainly used in chemical, food, electronic and other industries and plays a crucial role in promoting the progress of science and technology and the development of society in China. In the high temperature environment, such harsh conditions, the vacuum pump and other mechanical equipment to the normal and efficient work has brought a severe test.
Vacuum pump high temperature reason:
1. Normal heating, compression heat and friction heat of the motor
2, the power supply voltage is not normal, the motor bus voltage is 380V, due to the cable voltage and uneven load distribution, the motor voltage is less than 380V, the power constant voltage becomes smaller, resulting in current increase, thermal power increase
3, the refrigerant leakage, condensation pressure is too high
4. Low fan speed, small blade and small air volume
5, motor attached to dust and oil, etc., heat dissipation blocked
6, motor performance quality low vacuum pump high temperature solution:
1. Lengthen the fan cover, and install an axial flow fan with the same diameter as the fan inside. The power supply of the fan is also equipped
2. Adjust and control the inlet pressure
3. Dredge and add cooling water
4, adjust the amount of oil, choose high-quality oil
5. Regular inspection, mainly including oil level inspection, temperature inspection, motor load and motor accessories inspection
6. Regular cleaning and maintenance. Keep the motor clean and clean, regularly clean dirt, increase the heat dissipation capacity of vacuum pump motor.
There are many kinds of vacuum pumps, including screw pump, water environmental protection, rotary vane pump, roots pump and vortex pump, etc. According to the types and working conditions of vacuum pump, the influence of high temperature on the normal operation of equipment is analyzed from many aspects. High temperature will not only reduce the working efficiency of the vacuum pump, but also increase the energy consumption. Only by selecting high-quality products and services, keeping an eye on the usual working state of the vacuum pump, and timely maintenance, can the continuous high quality work efficiency be achieved
Roots blower for powder delivery

vacuum pump medical 

Large Blower

Large Blower

Large Blower

Notes for using water ring vacuum pump

Notes:
1. The water ring vacuum pump outlet is generally not connected with the valve. If there is, it must be fully opened before starting
2, without water can not start operation, but the amount of water can not be too much. Water ring vacuum pump is not allowed to be used as water pump
3. If the pump is stopped for too long, the rotor must be dismounted before starting to ensure that it can be started freely
4, mineral hard water in the pump operation easy scaling, should use soft water, if found after scaling, dilute hydrochloric acid can be removed
5, the pump seal surface is not a sealant, maintenance can be used gasoline after cleaning re-coated installation
6, when disassembling the pump, pay attention to remember the docking position of each part, after the bearing body and side cover connection bolts have adjustment washer is not lost, should be installed in situ
7. The packing water supply pipe cannot be directly connected to the water ring water supply pipe, or there will be no water entering the packing seal for cooling and lubrication due to the negative pressure
roots blowers for industrial

Liquid ring pump vacuum packaging manufacturer 

Water ring vacuum pump mechanical seal leakage reason?

1. Improper mechanical seal assembly
When replacing the non-power end machine seal, it is found in the disassembly process that the sealing o-ring on the moving ring is not installed properly. O type sealing ring should be installed in the sealing groove on the moving ring seat, and the demolition inspection found that O type ring is not so installed, but mistakenly installed in the spring positioning piece, resulting in the spring deformation, completely play the role of axial static seal, resulting in leakage.
2. The sealing cooling water pressure is too high
The binding force of the sealing surface of the dynamic and static ring is exerted by the spring on the moving ring. When the cooling water pressure is too high, the water pressure will act on the rotor and stator ring. Since the stator ring is fixed, the water pressure will push the rotor ring and compress the spring in the opposite direction of the stator ring, so as to weaken or offset the binding force of the rotor and stator ring, resulting in leakage of the sealing surface. Leakage test of cooling water into the machine seal at the power end after overhaul. If the inlet valve is opened less than 2/3, the machine seal is intact without leakage. If the water valve is opened more than 2/3, the machine seal will leak. According to the preliminary judgment, it is caused by the excessive water pressure. It is suggested to start up and use after the motor is repaired to further track and find out the real cause of leakage.
3. The sealing surface of the stationary and static ring is broken
This is caused by the previous several replacement of the pump seal leakage of the main reason. The power end and the non-power end seals are assembled on the same shaft, the impeller is installed in the middle of the shaft, and the two ends of the shaft are fixed with bearings. When the power end or non-power end machine seal is replaced separately, the bearing (bearing seat) at the corresponding end must be removed before the old machine seal can be removed and the new machine seal can be installed. At this time, because of the gravity of the shaft and impeller, the impeller and shaft that have lost one end of the bearing support will inevitably collapse downward and the shaft will tilt towards the non-bearing end. Since the stationary ring with one end not removed is fixed on the pump end cover by bolts, while the stationary ring is fixed on the shaft and rotates together with the shaft. In addition, because the clearance between the inner ring of the stationary ring and the shaft is very small, when the shaft collapses and tilts, it will cause:
A. Relative displacement of the stationary and static ring at the unremoved end makes the sealing surface of the stationary and static ring squeeze each other illegally, causing fracture;
B. the shaft is directly pressed on the inner ring of the unremoved end ring, causing the sealing surface of the static ring to fracture or break.

Vacuum pump for vacuum evaporation
Vacuum pump for vacuum forming

Blower rotors processing

What role does the vacuum pump play in the system?

In the selection of dry vacuum pump, it is very important to make clear the work task of the pump in the vacuum system. Therefore, the role of the vacuum pump in the vacuum system is mainly reflected in the following aspects:
1. Rough pumping pump
The production of crude pumping pump is from atmospheric pressure to reduce the vacuum system pressure to another pumping system can start to work
2. Main pump in the system
The so-called main pump is directly vacuum the vacuum system is pumped container to obtain the vacuum required to meet the requirements of the process.
3. Maintain the pump
The production of the maintenance pump is identified as the vacuum system pumping is very small, can not effectively use the main pre pump. For this purpose, an auxiliary front stage pump with a lower pumping speed is provided in the vacuum system to maintain the normal operation of the main pump or maintain the low pressure required for the evacuated container.
Dry vacuum pump
4, coarse and low vacuum pump, refers to the atmosphere from the start, reduce the pressure of the container to work in the low vacuum or rough vacuum pressure range.
5. Front stage pump
The production of the forepump is used to maintain the pressure of another pump in the forestage below its maximum permitted pressure.
6, high vacuum pump, refers to the work in the high vacuum range.
7, ultra high vacuum pump, refers to the work in the ultra high vacuum range.
8, booster pump, usually refers to the work between high and low vacuum pump, in order to improve the pumping system in the middle pressure range or reduce the pumping rate of the front stage pump requirements.
Only by understanding the role of the vacuum pump in the vacuum system, a thorough understanding of a piece of equipment, in order to facilitate future use.
What is the main function of the vacuum pump?

Vacuum pump for exhaust compression 

Water ring vacuum pump working principle

EVP vacuum pump manufacturers to introduce a water ring vacuum pump working principle is what?
Water ring vacuum pump (referred to as water ring pump) is a crude vacuum pump, which can obtain the limit vacuum of 2000~4000Pa, series atmospheric injector can reach 270~670Pa. Water ring pump can also be used as a compressor, known as water ring compressor, is attributed to the low pressure of the compressor, its pressure scale is 1~2 * 105Pa table pressure.
Water ring pump began as a self-priming pump, and then gradually used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, water ring pump is widely used. Because of the rapid development of vacuum technology, water ring pump has always been paid attention to in crude vacuum. Because the water ring pump gas contraction is isothermal, it can be removed flammable, explosive gas, in addition, but also can be removed dust, water gas, therefore, the use of water ring pump increasing.
The pump body is provided with an appropriate amount of water as the working fluid. When the impeller rotates clockwise in the figure, water is thrown around by the impeller. Because of the effect of centrifugal force, water forms a closed ring of approximately equal thickness depending on the shape of the pump chamber. The lower part of the water ring is exactly tangent to the hub of the impeller, and the upper part of the inner part of the water ring is just touching the top of the blade (in practice, the blade has a certain penetration depth in the water ring). At the moment, a crescent space is formed between the hub of the impeller and the water ring. If the bottom of the impeller 0 ° as starting point, so in front of the rotating impeller 180 ° when small cavity volume changes from small to big, and on the face of inspiratory mouth, air is sucked into at the moment, when the suction at the end of the small cavity is isolated from the rest of inspiratory mouth; When the impeller continuously rotates, the small cavity changes from large to small, so that the gas is compressed. When the small cavity and vent connected, the gas will be discharged from the pump.
To sum up, water ring pump is by the pump chamber volume change to achieve suction, contraction and exhaust, so it belongs to the variable volume vacuum pump.

Vacuum pump for gas collection
Water ring vacuum pump factory

What are the factors that affect the work of the vacuum pump?

A, the nozzle
The nozzle is an important part that affects the performance of the vacuum pump. There are some problems: the nozzle is installed wrongly, installed crooked, blocked, damaged, corroded and leaked. On the one hand, when installing the steam pipe, the residual iron and welding slag in the pipe will block the nozzle; On the other hand, when the vacuum pump system is out of service, the steam pipe is easy to rust, and the rust spot drops and blocks the nozzle during use.
Steam pressure
Low steam pressure and pressure fluctuation have a great impact on the capacity of the vacuum pump, so the steam pressure should not be lower than the required working pressure, but the vacuum pump structure design has been finalized, too much increase in steam pressure will not increase the volume and vacuum degree. In addition, to ensure that the boiler supply steam pressure stability, it is best to use a boiler dedicated to the steam jet pump to provide working steam, so that the steam pressure will not appear fluctuations, to ensure the stability of the vacuum pump performance.
Iii. Operating environment
Environment is mainly refers to the influence of the gas is pumped to the system of pollution, in the process of liquid steel disposal, liquid steel can emit a lot of gas, but also there will be a part of the subtle oxidation sheet jelly and other small particles drawn into a vacuum pump, these small particles can accumulate adhesion on the pump body, reduced the bleed line flow guide, extended the extraction time, decreased pump can qigong.
Circulating cooling water
If the cooling water supply is insufficient, the condenser will generate heat, the air flow will become louder, the vacuum degree will decrease rapidly, and even the steam will return to the suction pipe. Condensate plays an important role in the multistage vacuum pump. Condensate can condensate the steam in an abundant manner. The partial pressure of water vapor in the discharge pressure of the vacuum pump is necessarily higher than the corresponding full steam pressure.


vacuum pumps for foods drying
liquid ring vacuum pump selection

Single stage rotary vane vacuum pump maintenance points?

Single-stage rotary vane vacuum pump is also called XD rotary vane vacuum pump. Today xiaobian will give you a detailed introduction to the use and maintenance of single-stage rotary vane vacuum pump, small partners can remember it!
XD rotary vane vacuum pump vacuum pump oil
XD type rotary vane vacuum pump shall generally use XD rotary vane vacuum pump oil in accordance with sh0528-92 standard. Ambient temperature at 10 ℃ to 40 ℃ ISO ~ VG100 viscosity grade of XD rotary vane vacuum pump oil. Environment temperature 0 ℃ ~ 10 ℃ when using ISO VG32 ~ viscosity grade of vacuum pump oil. Vacuum pump operation must ensure that the oil level in the oil window height of 1/2-4/5. Check oil level and oil contamination regularly (weekly is recommended). If the oil level is too low, stop the XD rotary vane vacuum pump and add the appropriate vacuum pump oil to 4/5 of the height of the oil window. If the oil will be contaminated oil black, emulsifying, thickening, should be promptly changed oil.
Ii. 2XD rotary vane vacuum pump replacement of vacuum pump oil and oil filter time
XD rotary vane vacuum pump recommended pump after the first full 150 hours of work for oil. After that, change the oil every 500 hours. Oil filter should be replaced when changing oil. If the oil by pollution blackening, emulsification, thickening should be timely oil change. And clean the pump before adding new oil.
Three, cleaning, oil change steps:
1. Stop the XD rotary vane vacuum pump to drain the hot oil.
2. Turn on the drain plug and run for 5-10 seconds.
Drain the oil.
4. Inject cleaning oil (no. 32 ordinary machine oil) to 3/4 of the height of the oil window.
5. Operate XD rotary vane vacuum pump for 5-10 minutes.
6. Stop the pump and drain the oil. If the oil does not meet the requirements, repeat steps 4 and 5.
7. Turn on the drain plug to run 5-10 banknotes.
Drain the oil.
9. Inject the specified new XD rotary vane vacuum pump oil.
Iv. Replace the exhaust filter
If the pump temperature rises obviously, the motor current reaches or exceeds the rated current, and the exhaust port of the pump produces lampblack, it shall check whether the exhaust filter is blocked. If it is blocked, it shall be replaced in time. The exhaust pressure gauge can be installed in the refueling hole of the pump to check whether the filter is blocked. Replace the exhaust filter when pressure exceeds 0.6bar(gauge pressure).
Five, clean the suction filter
The suction strainer should be kept clean to prevent rapid drawdown.
Vi. Storage method
If the pump is not used for a long time, should drain the oil and clean the pump, and then inject the specified new oil placed in a dry place.
XD type rotary vane vacuum pump others
1. If the user needs to order spare parts for maintenance, please inform the model and machine number of XD rotary vane vacuum pump. The type and number of the pump can be found on the nameplate of the pump.
2. As some maintenance and repair work requires certain professional knowledge, equipment and special tools, please contact the manufacturer for details.
3, pump handling should ensure that there is no oil. Do not impact tubing, oil filters, etc.

Laboratory Vacuum Pump Buyer's Guide
Work flow: how to compare vacuum pumps

Roots blower-Roots type supercharger

What kinds of vacuum pumps are available in a vacuum system?

Vacuum system is composed of vacuum chamber, vacuum pump or vacuum unit, vacuum pipe, vacuum valve, collector and other vacuum components, electrical control system, etc. It is widely used in electronic semiconductor industry, photoelectric backlight module, mechanical processing and other industries. Vacuum system is usually composed of several vacuum pumps, according to their characteristics in different areas play a role.
1, the main pump
The main pump is used to obtain the required vacuum degree to meet the specific process requirements of the vacuum pump. Depending on the ultimate pressure required by the vacuum system, the ultimate pressure of the main pump is generally half to one order of magnitude lower than that required by the system in the selection process.
2. Rough pumping pump
Rough pump refers to the vacuum pump which starts to pump air from the atmospheric pressure and reduces the pressure of the pumping system to the point where the main pump system can start to work.
The pressure achieved by the rough pump must be less than the starting working pressure of the main pump. The rough pump can also be used as the front pump.
3. Front stage pump
The pre-stage pump is a vacuum pump which maintains the pre-stage pressure of a pump below its pre-stage critical pressure. The front stage pump can also be used as a rough pump, but it must meet the requirements of pre-pumping time and vacuum degree.
At the same time, the front stage pump is required to meet the pre-vacuum conditions required by the main pump; Under the maximum allowable exhaust pressure of the main pump, the front pump must timely discharge the most atmospheric volume discharged by the main pump, and the pumping speed of the front pump must be in accordance with the actual pumping speed of the pump at the actual inlet pressure.
4. Maintain the pump
Maintenance pump refers to the vacuum system when the amount of air is very small, can not effectively use the front pump. To this end, in the vacuum system, another auxiliary pump with low pumping speed is used to maintain the normal operation of the main pump or to maintain the vacuum pump with low pressure required by the pumped system.
Do I Really Need A Vacuum Pump?

Vacuum Pump Purchase Guide