A pump that uses mechanical movement (rotation or sliding) to obtain vacuum is called a mechanical vacuum pump. According to its working principle and structural characteristics, mechanical vacuum pump can be divided into the following categories: variable capacity vacuum pump: it uses the periodic change of pump cavity volume to complete the work of the pump. Suction and discharge. A vacuum pump for pumping water. The gas is compressed before leaving the pump room. This type of pump is divided into two types: reciprocating pump and rotary pump.
Reciprocating vacuum pump: reciprocating the piston in the pump room to suction, compress and discharge gas. This product is also called piston vacuum pump. The vacuum degree of this kind of product is usually about 1330pa, and the normal working pressure is 1330pa? 105Pa. It is mainly used for the process of removing air or containing a small amount of condensable gas, and the vacuum degree is not high.
Such as vacuum molding, vacuum concentration, vacuum impregnation, material vacuum transportation and other processes, rotary vacuum pump: This product uses the rotary motion of the rotor components in the pump room to pump, compress and discharge gas. It has the following classification: oil seal vacuum pump: it is a rotary variable displacement vacuum pump, which uses vacuum pump oil to seal the gap between moving parts in the pump and reduce harmful space in the pump.
Such pumps usually have gas ballast. It mainly includes rotary vane vacuum pump, fixed plate vacuum pump, slide valve vacuum pump, cycloid vacuum pump, etc. the vacuum degree of such products is usually about 0.05 to 0.5pa, and the normal working pressure is 0.5 to 103pa or higher. It is mainly used in the process of removing air or containing a small amount of condensable gas and requiring high vacuum.
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