The first is according to the structure can be divided into mechanical vacuum pump and jet vacuum pump. All mechanical movements (rotating or sliding) used in various vacuum equipment to change the pump suction container volume and vacuum pump are commonly referred to as mechanical vacuum pumps. The mechanical volume vacuum pump changes the working volume of the pump chamber through mechanical movement to achieve the effect of the mechanical volume vacuum pump. These pumps include reciprocating vacuum pumps, rotary mechanical pumps (including rotary pumps, screw pumps, Roots pumps, liquid ring pumps, etc.). This type of pump is used in addition to the mechanical pump.
Secondly, according to the working principle, it can be divided into a gas delivery vacuum pump and a gas trapping vacuum pump. A gas delivery pump is a target that allows gas to be drawn in and out continuously to reach the suction vacuum pump. There are two types of vacuum pumps: variable volume vacuum pumps and momentum transfer pumps. The gas trapping pump is a vacuum pump that adsorbs or agglomerates gas molecules on the inner surface of the pump, thereby reducing the amount of gas molecules in the container and achieving the purpose of suction. Piston vacuum pumps, rotary vane vacuum pumps, vacuum pumps, screw vacuum pumps, vacuum pumps, diffusion pump injection pumps and several other typical types.
