Description of principle of piston vacuum pump:
1. in the slide valve are installed in the pump body (1) (4), (3) within the slide valve is equipped with eccentric wheel, eccentric by to outside the pump cylinder shaft (2) driven to rotate, and the center axis of the pump cylinder center is overlap, slide valve in the pump cylinder of the cylindrical surface of slide, slide valve of the semicircular upper valve guide rail (5) sliding and swinging up and down freely. So the rotary piston vacuum pump cylinder was slide valve is divided into A, B two room, as shown in the above, if the shaft rotates counterclockwise direction, the room A gradually expanding, shrinking room B, finally A room into the biggest, room B to A minimum.The-application-of-water-ring-vacuum-pump-in-coal-mine-industry
2. on the other hand, the upper part is hollow, vacuum pump has slotted in room A side open, during A room to expand, gas through the hollow part of the slide valve, A indoor by slotted into the pump chamber.Type-of-oil-diffusion-pump
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