A rotary vane vacuum pump is a type of variable capacity mechanical vacuum pump that uses a rotary motion of a rotor and a vane that slides in a rotor slot to obtain a vacuum. When using the working fluid for lubrication and filling the pump cavity, separating the exhaust valve and the atmosphere, the so-called oil seal rotary vane vacuum pump. When there is no working fluid, it is a dry rotary vane vacuum pump, another page will be introduced. In the oil seal rotary vane vacuum pump, the domestic customary said the belt drive for the rotary vane vacuum pump, and the pump directly connected with the motor or with a coupling called the direct rotary vane vacuum pump. In each pump, there are single and two points. In a single-stage pump, due to the different structure and parameters used, the ultimate pressure and use of the pump are also different. Their common feature is the structure is simple, easy to use, can start from atmospheric pressure, can be directly discharged into the atmosphere, the eccentric mass smaller, easy maintenance, two-stage pump ultimate pressure of 6 × 10-2 ~ l × 10- 2Pa, a single-stage pump up to about 4Pa, the other single-stage pump is about 50 ~ 200Pa. Since 1909, W.Gaede invented the rotary vane pump and obtained the German patent. In 1936, it invented the pneumatic pump. Since the patent was granted in 1941, the rotary vane vacuum pump has been widely used and continuously improved. In the late 1960s, the trend of miniaturization of increasing speed and direct connection appeared in the world. In the early 1970s, direct series products appeared. By the early 1980s, they introduced an improved series of products with various options available to users Accessories, can protect the pump, or protect the environment, the pump itself has also improved the structure to improve reliability. In the structure of the pump, in order to prevent the return pump to stop the pump, and some can automatically cut off the oil check valve, and some with intake channel shut-off valve, and some in order to open the pump in the gas town Sudden power outage automatically cut off gas to keep the pump port in a vacuum state with the pump and control structure. In the annex, there are demisters, odor filters, debris filters and other debris used to prevent broken population filters, dust filters, steam condensate trap, a chemical trap, there is control of the pump temperature to increase the water vapor extraction rate and protection of the pump The temperature control water volume control valve. By the late 1980s and early 1990s, oil filters were introduced that could monitor electronic displays such as oil temperature, oil pressure, oil quality, etc., and even linked them to computers for automatic control using forced lubrication and air cooling to pump Continuous working inlet pressure of 10kPa, or even higher, the same pump and therefore greater scope of application. Double-stage rotary vane vacuum pump, can be widely used in refrigerators, air conditioners, light bulbs, fluorescent lamps, bottle gall production and electronics, metallurgy, medicine, chemicals, oil filters, printing machinery, packaging machines and other industries, Ib pump, molecular pump and other fore pump, for electronic equipment, medical equipment and other supporting and experimental research applications. As the straight-line pump friction belt dust pollution, small size, light weight, material saving, the function is maturing, more widely promoted.
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