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.
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