Development of rotary vane vacuum pump

Rotary vane vacuum pump is a kind of variable volume mechanical vacuum pump, which is made up of the rotor and the rotary motion of the rotary vane sliding in the rotor slot. When the working fluid is used to lubricate and fill the dead space of the pump chamber, the utility model separates the exhaust valve and the atmosphere.

When there is no working fluid, it is a dry rotary vane vacuum pump. In the oil seal rotary vane vacuum pump, the domestic use of belt drive for the rotary vane vacuum pump, and the pump and the motor directly connected or connected with the coupling is called the rotary vane vacuum pump. In each kind of pump, but also has the single stage and the double grade. In the single-stage pump, due to the selection of the structure and parameters of the different types of pumps, the ultimate pressure and the use of different. Their common feature is simple structure, convenient use, starting from the atmospheric pressure, the atmosphere can be directly discharged, small eccentric quality convenient maintenance, the limit pressure of double stage pump is 6 * 10-2 to L * 10-2Pa, a single pump can reach about 4Pa, another single-stage pump 50 ~ 200Pa.

Since 1909, Gade (W.Gaede) invented the rotary vane pump and obtained a patent in Germany, in 1936 invented the gas town pump, patented in 1941, rotary vane vacuum pump has been widely used and constantly improve. At the end of 60s, there is an international increase speed, direct the miniaturization trend, at the beginning of 70s appeared in direct series of products at the beginning of the 80s, and launched a series of products to improve, there are many for the user matching accessories, can protect the pump, or to protect the environment, the structure of the pump itself can be improved and the to improve the reliability of. In the pump structure, in order to prevent the return of oil in the pump is stopped, some of which can automatically cut off the oil valve, some with inlet channel cut-off valve, to run a sudden power outage automatically cut off when the gas path to keep the pump in the vacuum state and is provided with an oil pump and control structure in the gas ballast pump. In the appendix, a mist eliminators, odor barrier filter, broken glass and other debris in the population of filter, dust filter, steam condensate trap, chemical trap, control the pump temperature to improve the water vapor temperature water removal rate and the protection of the pump control valve. By the end of 80s, early 90s, and launched the oil filter, oil temperature, oil pressure, electronic monitor oil etc., even with computer connection, automatic control, forced lubrication and cooling, the continuous working pressure of the pump entrance to 10kPa, or even higher, the scope of the same pump and more. Two stage rotary vane vacuum pump can be widely used in refrigerators, air conditioners, light bulbs, fluorescent lamp, and the production of electronics, metallurgy, medicine, chemical industry, oil filter, printing machinery, packaging machine industry, can be used as the pre pump diffusion pump, roots pump, molecular pump etc., for electronic instrument, medical instruments and other supporting and experimental application. Because the direct coupling pump does not have the belt friction dust pollution, the volume is small, the weight is light, the material is saved, the function consummates day by day, is widely promoted the application.