Rotary vane vacuum pump selection of 5 note -

rotary vane vacuum pump is mainly used to obtain low vacuum degree. It can be divided into the oil seal and dry pump. According to the required degree of vacuum, also can be divided into single-stage and two-stage pump ( More commonly used) 。 Rotary vane vacuum pump is mainly composed of pump body, rotor, vane, end cover and spring and other parts. Rotor mounted eccentrically in the cavity of rotary-vane vacuum pump, rotor outer and inner surface of the cavity and tangent, two rotary vane pumps with spring installed in the rotor slot. When the operation of the rotor, the rotor can be reciprocating sliding along its radial grooves, and always contact with the inner surface of the water pump housing. Rotor and rotor rotating together, thus will the vacuum pump cavity space into multiple variable volume.

when using rotary vane vacuum pumps, we should pay attention to the following

1. Before using rotary vane vacuum pump, it is necessary to maintain the cleanness of pump, in order to avoid the impurities in the pump body to enter. Check the oil quantity and filling in the center of the oil mark. If too low, exhaust valve will not seal effect, and will affect the vacuum degree of vacuum pump. If too high, fuel injection reaction will occur. Vacuum pump is running, there will be a normal oil increase reaction. Should be used while filling, conform to the specified vacuum pump brand clean vacuum pump oil. After oil injection hole is filled, should filter clogging oil hole, prevent with other debris into the vacuum water pump oil storehouse.

2。 When the rotary vane vacuum water pump working environment temperature is too high, rotary vane vacuum pump oil temperature will rise. This is because the hot molecular movement speed, oil viscosity, lead to greater saturation vapour pressure, and eventually reduce the ultimate vacuum. DE Neil vacuum pump manufacturer's technical personnel, points out that in order to improve the vacuum degree of vacuum pump, can increase wind, improve the quality of the vacuum pump oil, the reducing temperature, speed up heat dissipation.

3。 In the process of use of the rotary-vane vacuum pump operation, the extracted substances should not be high oxygen content, high water vapor content, flammable and explosive gases, for metal corrosive substances. Some material is not stable, will react with the vacuum pump oil. These gases should not be extracted.

4。 If the electromagnetic valve to be installed in rotary vane vacuum pump port, can under the atmospheric pressure or any vacuum next boot startup and running at the same time of pump.

5。 During the normal operation of rotary vane vacuum pump, pump running after, rotary vane vacuum pump inlet and pump container connection, and through the slow rotation three-way valve air isolation with the outside world.