Vacuum pump of the transfiguration of vacuum pump - gas transmission

the variable capacity pump is a vacuum pump, it USES the periodical change of pump chamber volume to complete suction and exhaust process. The gas is compressed before discharge. This pump can be divided into two types: reciprocating and rotating:

1, reciprocating vacuum pump: it using the reciprocating motion of piston pump chamber to suction, compression and exhaust gas. Therefore, it is also known as the piston vacuum pump ( Diaphragm vacuum pump is a kind of reciprocating vacuum pump) 。

2, rotary vacuum pump: it USES the movement of the rotor rotate in the pump cavity in order to suction gas, compression and exhaust gases. Rotary vacuum pump has several types:

1) Oil seal vacuum pump: this is a revolving variable capacity pump, it USES the oil seal of the gaps between the moving parts and reduce harmful space. This usually has a gas ballast pump device, so also known as air vacuum pump. According to the structure characteristic, divided into the following five types:

a) Rotary vane vacuum pump, rotor is installed in the pump shell, has certain eccentric distance, and near the pump shell on the surface of the fixed surface. Installed in the rotor tank two ( Or more than two) The rotor blades. The rotor rotates, the rotor blades can be sliding back and forth along the radial grooves, and always come in contact with the wall of the pump shell. The rotational blade with the rotor rotation, the cavity into several variable displacement pump.

b) Rotary piston vacuum pumps, slide valve installed on the outside of the eccentric rotor. Along the pump rotor driven spool shell inner wall sliding and rolling. Intermediate sliding, at the same time, the cavity is divided into two variable displacement pump.

c) Fixed vane vacuum pump, pump shell near the inner surface of the inner pump is equipped with eccentric rotor and the pump shell has always contact with the surface of the rotor radial sliding vane. The rotor rotates, sliding vane can slide up and down with the cavity is divided into two variable displacement pump.

d) Yu pendulum type vacuum pump: eccentric rotor rotor profile is installed in the pump chamber, the contour along the internal rotation of the pump housing and the pump cavity is divided into two variable volume.

e) Among multicellular rotary vane vacuum pump: the pump shell, driven by the same motor multiple independent rotary vane vacuum pumps (installed in parallel Public number: pump pipe) 。

2) Type liquid ring vacuum pump, the eccentric installed in the pump shell has more rotor blades. When it rotates, it will be liquid ( Usually water or oil) Throw on the pump shell, form concentric rings of liquid ring pump housing. Liquid ring and the rotor blades will change as the volume of a cyclical and the formation of a few small volume. When the medium is water, also known as water ring vacuum pump.

3) Roots vacuum pump, the pump is equipped with two convex Angle or more convex Angle of the rotor, which is in the opposite direction, and the rotor and keep a certain gap between the rotor and the pump shell inner wall. It belongs to rotate the variable capacity pump. Mechanical booster pump is this type of vacuum pump.

4) Screw vacuum pump: used in the water pump shell in a pair of screw, for synchronous high-speed counter-rotating suction device suction and exhaust function, it is the alternative products oil seal vacuum pump, can remove a large amount of water vapor and a small amount of dust and gas are widely used in China's major pharmaceutical and chemical company.

5) Claw type vacuum pump: the principle of claw type vacuum pump and roots are similar. Two claw rotor with inlet volume pump cavity formation. In the process of rotation, the rotor can be automatically opened and closed.

6) Scroll vacuum pump, vortex pump has evolved from the vortex compressor oil-free vacuum pump.

among them, the screw vacuum water pump, claw type vacuum pump and vortex type vacuum pump can also be called a dry vacuum pump, can be achieved without oil seal.

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