Pillow Block Bearing,Agricultural Machinery Pillow Block Bearing,Low Noise Pillow Block Bearings,Pillow Block Bearing Uc Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearing.com
What is rotary vane vacuum pump?
Rotary vane rotary vacuum pump Sliding vane rotary vacuum pump equipped with sliding vane rotor for reciprocating motion in the pump chamber, so that the pump chamber separated by the vane chamber volume changes periodically in order to achieve vacuum pump, also known as vane Vacuum pump. Figure rotary vane vacuum pump working principle of rotary vane vacuum pump working principle. It is mainly composed of pump body (stator) and rotor. There are two or more vanes in the rotor slot, and some of the pump vanes are spring loaded. The rotor is eccentrically mounted in the pump chamber with a gap of 2 to 3 microns between its outer edge and the top surface of the pump chamber. Under the action of centrifugal force and the like, the vane slides reciprocally along the groove and keeps contact with the inner wall of the pump cavity during the rotation of the rotor, and divides the pump cavity into two or more variable-volume working chambers. When the rotor is rotated clockwise, the volume of the suction chamber communicating with the suction port gradually increases from zero, and the pressure of the gas in the chamber is reduced, so that the suctioned gas is continuously inhaled from the suction port principle). At the same time, the volume of the exhaust chamber communicating with the exhaust port decreases from large to small, and the gas in the suction chamber is compressed. When the gas pressure is higher than the atmospheric pressure, the exhaust valve is pushed out of the atmosphere to exhaust the air principle). Continuous rotation of the rotor, the pump will continue to exhaust. Exhaust valve immersed in the oil, oil through the exhaust valve and oil hole into the pump cavity, so that all moving parts of the pump chamber covered with a layer of film, sealing the suction chamber and exhaust chamber clearance between the gas to prevent the return flow. These oils also reduce the harmful space inside the exhaust chamber to eliminate their effect on the ultimate pressure. Therefore, this vacuum pump is a kind of oil-sealed mechanical vacuum pump. With the development of technology, manufacturing process improvement and the selection of high quality materials, small vane vacuum pump shaft can be directly connected with the motor shaft speed up to 1450 rev / min, greatly improving the pump suction rate and reduce the pump weight. Vane vacuum pump pumping speed range of 0.5 to 150 liters / second (1 liter = 10 meters), the working pressure range is generally 1 × 10 ~ 1 Pa, the larger pumping speed pressure range of 1 × 10 ~ 13 Pa. The ultimate pressure: single-stage pump 1 Pa, two-stage pump 6.5 × 10 Pa. Rotary vane vacuum pumps are generally only suitable for the removal of dry or gas containing a small amount of condensable vapors (for which the town gas valve must be installed), unsuitable for pumping high oxygen content, explosive, corrosive, pump chemical role And gas containing solid particles. In vacuum systems, this pump can be used alone, or as a booster pump, diffusion pump and other foreline pump.