How to isolate vibration for self priming pumps?

The installation of self priming pumps, especially newly installed pumps, must take vibration isolation measures and avoid laziness, otherwise significant vibration and noise may occur during use. When running a self priming pump, the noise is loud, which can damage the equipment and also cause noise pollution. Therefore, it is necessary to do a good job of vibration isolation. How can self priming pumps achieve effective vibration isolation?
1、 The vibration isolation components should be symmetrically arranged along the central axis of the self priming pump unit. The plane layout of rubber vibration isolation pads can be arranged in a clockwise or counterclockwise direction.
2、 When the vibration isolation components of the unit adopt six support points, four of them should be arranged at the four corners of the inert block or steel frame, and the other two should be set on the long side line and adjusted in position to ensure that the compression deformation of the vibration isolation components is as consistent as possible.
3、 When installing rubber isolation pads or damping spring isolators for vibration isolation of self priming pump units, generally, there is no need to bond or fix the rubber isolation pads and damping spring isolators to the ground, as well as to the inert block or steel frame.
4、 When rubber isolators are used for vibration isolation installation of unsealed self priming pump units, a steel frame should be installed under the base of the water pump unit and anchored installation should be adopted; The steel frame and rubber isolator should be fixed with bolts. Install anchor bolts in the ground or floor, and the rubber vibration isolator is fixed to the ground or floor through the anchor bolts.
5、 The edge line of the rubber isolation pad shall not exceed the edge line of the inert block; The supporting area of the steel frame should not be less than the supporting area of the top of the vibration isolation element.
6、 The rubber isolation pad is arranged in a single layer, and when the frequency ratio cannot meet the requirements, it can be arranged in multiple layers in series, but the number of isolation pad layers should not exceed five.
7、 When the rubber vibration isolation pad is set in multiple layers in series, each layer of vibration isolation pad is separated by a galvanized steel plate with a thickness of not less than 4mm. The steel plate should be flat, and the vibration isolation pad and steel plate should be bonded with adhesive. The flat size of the galvanized steel plate should be 10mm larger than each end of the rubber vibration isolation pad. The rubber vibration isolation pads bonded to the upper and lower layers of galvanized steel plates should be staggered.
8、 Before installing the ZXP stainless steel self priming pump during construction, it should be checked in a timely manner. During installation, the static compression deformation of the isolation element should not exceed the allowable value. Moreover, the vibration isolation components of the unit should avoid contact with substances such as acids, alkalis, and organic solvents.
Attention should be paid to these aspects in the design, manufacturing, and maintenance of self priming pumps. Only by following the requirements can vibration and noise be reduced, and equipment damage be reduced. If it cannot be resolved, you can consult us.

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How can a self priming pump meet the standards?

Standard self priming pumps are being used in an increasing number of operating conditions, and only those that meet the following conditions are truly self priming pumps:
1. The self priming pump is a vertical self priming pump, with the motor and self priming pump coaxial.
2. All motors must have dedicated motors, and the entire rotor of the self priming pump should be supported by the bearings of the motor.
3. The original model of the automatic control self priming pump was WFB, but later on, other WFZB, WZB, and YWB were all modified based on the model of the old automatic control self priming pump.
4. The flow rate and head of the self priming pump should be within a range value. When the flow rate is high, the head of the self priming pump is small. When the head is high, the flow rate of the self priming pump is small.
5. The performance of the self priming pump can be adjusted using a valve, and the flow and head of the self priming pump can be controlled by the switch size of the valve.
6. When used at temperatures below 40 degrees Celsius, it does not affect the performance of the self priming pump.
7. The self-control self priming pump should have reliable rust prevention measures, the surface should be polished smooth, the welding should have no cracks, and collision should not scratch.
8. It is necessary to have an electromagnetic control valve, and no self priming pump is said to have no air control valve.

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Prospects and directions for improvement of chemical pumps

 

The characteristics of chemical pumps should be: high quality, high reliability, and high environmental performance; While completing the task of transporting chemical media, it is also beneficial for the physical health of workers; Low expected service life cost; It can be organically integrated with the entire set of chemical equipment into a whole. However, in the chemical production process, various specific usage conditions and purposes have put forward various requirements for the manufacturing of chemical pumps.
The prominent feature of mechanical products used in the chemical industry is that the performance and requirements of mechanical products vary with the type and nature of the chemical medium being transported. Although the medium mentioned here sometimes also refers to water, oil, or other non hazardous substances; However, in most cases, chemical media refer to some very "terrifying" chemical raw materials; For example, some media with serious hazards (toxic, corrosive, and flammable media); Especially for media that are prone to chemical reactions, corrosive, and erosive, or solid or gaseous media containing the aforementioned components.
Changes in chemical composition and chemical element ratios in diverse chemical media can lead to changes in the properties of the chemical media; Causing an increase in the concentration of chemical media or having special flow properties (such as diffusive media, polymer solutions, etc.). Therefore, particularly strict quality requirements are often put forward for the purity of chemical media (GMP, polymers, electrolytes, etc.), which can be easily achieved through suitable chemical pumps. The diversity of chemical media has derived the diversity of requirements for chemical pumps. This makes it difficult for the chemical pump standard system to become a simple standard system. Compared to other fields, such as home appliances, home heating, water supply, drainage, etc., as well as chemical refining or automotive manufacturing, standardization has reached a considerable level not only in product production but also in product use. In chemical production enterprises, the standardization of chemical pumps has encountered obstacles in terms of technology and economy.
Let's talk about the direction of optimizing and improving chemical pumps below:
Firstly, standardization is very helpful and meaningful for the production and use of chemical pumps. But from the perspective of life cycle costs, what should economic standardization look like? Is it a detailed standardized long-term optimization calculation based on various specific usage situations? Or is it a rough standardized calculation? When will the hindrance of standardized investments that can only be recovered over a long period of time due to the adoption of new technologies and the development of new products end? How can we achieve a unified understanding of the standards for chemical pumps on both sides without harming the interests of either the chemical pump manufacturer or the chemical pump user? These questions can only be answered by strengthening dialogue between chemical pump users, industry associations, and chemical pump manufacturers. Possible solutions are: from the perspective of users, such as establishing long-term strategic partnerships with suppliers; Establish different levels of standardization within clearly defined levels (such as structural types, suppliers, series, materials, configuration methods, etc.) and integrated modular structures for chemical pumps. But what is important is still the issue of "service life cost".

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Daily maintenance of stainless steel multistage centrifugal pump

 

Stainless steel multi-stage centrifugal pump can be used for conveying different media, especially corrosive media. However, after long-term use, the centrifugal pump will inevitably have some failures. Therefore, it is necessary to carry out necessary maintenance during the use of the centrifugal pump. Now let's follow Zoomlion pump to understand the daily maintenance of stainless steel multi-stage centrifugal pump.
The daily maintenance of stainless steel multistage centrifugal pump is to check whether the running sound of the centrifugal pump is normal, whether there is vibration and leakage every day. If there is a problem with the centrifugal pump, it should be handled in time. In daily use, it is also necessary to keep the stainless steel multistage centrifugal pump clean, dry, free of oil and leakage.
For the daily maintenance of stainless steel multistage centrifugal pump, it is also necessary to check whether the coupling protection cover, foundation and other screws are fastened and loose. And whether the voltage of the centrifugal pump is within the specified range, whether the appearance motor wiring and grounding are normal, etc. if the wiring of the centrifugal pump is found to be faulty, it is necessary to immediately stop using and repair the centrifugal pump.
Maintain the stainless steel multistage centrifugal pump, and check whether the motor steering is correct. When the centrifugal pump operates normally, open the outlet pressure gauge and the inlet vacuum pump to gradually open the gate valve and check the motor load at the same time.
The above is the daily maintenance method of stainless steel multi-stage centrifugal pump summarized by Xiaobian for you. I believe you will have a certain understanding of the maintenance of stainless steel multi-stage centrifugal pump after reading it.

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Common troubleshooting of laboratory centrifugal pumps

What faults can centrifugal pumps encounter in the laboratory, and how can these conditions be eliminated? Let's take a look. Diaphragm pumps
1. During use, the motor often fails to start, such as when the main power indicator light is on. At this time, the degree of carbon brush wear should be checked. If the carbon brush wear exceeds one-third of the total amount, it should be replaced with a new one in a timely manner. When the main power indicator light is not on, check if the indicator light fuse and indoor distribution board fuse are blown, and also check if the power cord is in good contact. If the fuse is broken, replace the fuse and keep the circuit smooth. The screw pump should also check the vacuum pump gauge and oil pressure indicator values. If the oil pressure is too high and the main engine cannot be started, it is necessary to check whether each oil circuit is blocked, especially whether the throttle hole is smooth. If it is not smooth, it should be cleaned to make it smooth.
2. If the bearing is damaged or its rotation is hindered, there is a lack of oil in the bearing or there is a lot of dirt in the bearing, which causes an increase in friction resistance. If the motor cannot reach the rated speed, the bearing should be cleaned or replaced in a timely manner. There is a layer of oxide on the surface of the commutator, even if it is burnt into unevenness or the brush does not match the outer edge of the commutator, which can cause a decrease in speed. The commutator and brush should be cleaned to ensure good contact. If there is a short circuit or open circuit in the rotor coil of a centrifugal pump, a multimeter can be used to check and rewind the coil. The rotor can cause rupture of the centrifuge tube, sample leakage, and rotor damage during use due to metal fatigue, overspeed, overstress, chemical corrosion, improper selection, imbalance of the rotating head during use, and temperature runaway. For the above situations, it is mainly required for the operator to master the operating procedures proficiently, select appropriate centrifugal pipes and rotors correctly, pay attention to strictly controlling each step of operation sequence, minimize unnecessary human damage, and use the rotor within the safety factor and warranty period. Magnetic pump
3. One of the reasons for the poor starting and cooling performance of the refrigerator is that the power supply is not available, and the power supply and fuse should be checked separately. If the voltage is too low and the safety device malfunctions, it can also prevent the refrigerator from starting. If the voltage is too low, it may be due to the low voltage of the power grid; Excessive wiring on the distribution board; The power cord is too long (ideal length is 3 meters), etc. Insufficient power cord capacity not only reduces voltage, but also causes accidents. Sewage pump
4. When the power supply voltage drops to 180-190VJ, the refrigerator cannot start, affecting the cooling effect. Poor ventilation performance, such as when the instrument is installed in direct sunlight or poorly ventilated areas, poor radiator effect, or the radiator cover is covered with dust, can also affect the cooling effect. The weight of the centrifuge tube is unbalanced and placed asymmetrically; There are foreign objects in the rotor hole, causing imbalanced load; Loose fixing nut at the upper end of the shaft, friction or bending of the shaft; The motor rotor will generate noise if it is not in the center of the magnetic field; Damage to the rotor itself can cause severe vibration and abnormal noise in the body. Self priming pump
Many times, it is caused by incorrect operation. After identifying the cause, correct operation can eliminate the abnormal phenomenon. During the work process, if any abnormal phenomena occur, the machine should be immediately shut down and forced operation is not allowed to avoid unnecessary losses or accidents. Chemical pumps.

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Which media needs to be transported with fluorine lined pumps

Fluorine lined pump is a special type of pump, its main function is to transport some special media. These media usually have certain corrosive or high-temperature and high-pressure characteristics, so it is necessary to use fluorine lined pumps for transportation. Fluorine lined pumps have been widely used in industries such as chemical, pharmaceutical, and electric power. Let's take a look at which media need to be transported with fluorine lined pumps.
Which media needs to be transported with fluorine lined pumps
Firstly, fluorine lined pumps are suitable for transporting corrosive media. In the chemical industry, many chemicals have certain corrosiveness, such as acids, alkalis, salts, etc. If these chemicals are transported using ordinary pumps, they can easily cause corrosion and damage to the pumps, and even cause serious damage to production equipment.
The fluorine lined pump has good corrosion resistance, which can effectively avoid the occurrence of these problems and ensure the safety and stability of production. Secondly, fluorine lined pumps are suitable for conveying high-temperature media. In some high-temperature production environments, ordinary pumps are difficult to withstand the impact of high temperatures, and are prone to problems such as pump body deformation and seal failure. The fluorine lined pump is made of special materials, which can withstand the influence of high temperature and ensure the stability and safety of the conveying medium. In addition, fluorine lined pumps are also suitable for conveying high viscosity media.
In some pharmaceutical, food and other industries, some media have high viscosity and it is difficult to transport them out using ordinary pumps. The fluorine lined pump adopts a special design and structure, which can effectively solve this problem and ensure smooth and stable transportation.
In short, fluorine lined pumps are a special type of pump suitable for conveying some special media. It has good corrosion resistance, high temperature resistance, and adaptability to high viscosity media, which can ensure the safety and stability of production. In industries such as chemical, pharmaceutical, and power, fluorine lined pumps have been widely used and have become indispensable and important equipment in the production process.

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Precautions for centrifugal pump testing

After the installation of various centrifugal pump products newly purchased and installed, it is necessary to conduct centrifugal pump testing work in advance. When conducting centrifugal pump testing work, the following methods and precautions for centrifugal pump testing should be followed
1. Before starting the centrifugal pump, it is prohibited to conduct idle and no-load testing. Liquid testing should be carried out according to the operating procedures specified in the centrifugal pump operating instructions. For the forced lubrication system, the temperature rise of the centrifugal pump bearing oil should not exceed 28 degrees, and the temperature of the bearing metal should be less than 93 ℃.
2. For centrifugal pumps with oil ring lubrication or splash lubrication systems, the temperature of the lubricating oil should not exceed 39 degrees, and the temperature of the bearing components should be less than 82 degrees.
3. When testing the centrifugal pump, the vibration value of the centrifugal pump bearing should also be checked. The vibration standard of the centrifugal pump bearing can refer to the relevant vibration standards of petrochemical rotating machinery.
4. During the testing process of the centrifugal pump, the operation of the centrifugal pump should be very balanced and noise free. The coolant and lubricating oil system should be normal, and there should be no leakage in the centrifugal pump and its auxiliary pipelines.
5. During the process of testing the centrifugal pump, attention should be paid to whether the current of the centrifugal pump motor is operating within the specified range. If the current exceeds the specified range, it indicates that the actual operating head is lower than the pump head. In this case, it is recommended to turn down the outlet valve to control the flow of the centrifugal pump and use it within the rated current range.
6. The leakage of various seals and media in centrifugal pumps shall not exceed the following standard requirements:
(1) Clean water centrifugal pump with mechanical seal: 10 drops/min for light oil and 5 drops/min for heavy oil
(2) Multi stage centrifugal pump products sealed with packing: 20 drops/min for light oil and 10 drops/min for heavy oil
(3) For magnetic drive pumps conveying toxic, harmful, flammable, and explosive media, no obvious visible leakage is allowed.

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