The pumping mechanism of molecular vacuum pump is different from the mechanism of mechanical pump pumping by the change of pump cavity volume. The principle of momentum transfer is used to make molecules flow directionally and be discharged out of the pump, so as to achieve the purpose of pumping. Molecular vacuum factory feels that because of its stable and reliable operation and good pumping efficiency in molecular flow state, it has become the mainstream acquisition equipment in the field of clean high vacuum and ultra-high vacuum applications, and is widely used in scientific instruments and industrial production equipment. 

　　Molecular vacuum factory uses a high-speed moving rigid surface to carry gas molecules and make them move in a certain direction is called molecular traction phenomenon, and the vacuum pump made by this phenomenon is called traction molecular pump.

　　Molecular Vacuum Factory believes that the advantages of the traction molecular pump are that the start-up time is short, and it has a high compression ratio in the molecular flow state. It can remove various gases and vapors, and is especially suitable for removing heavy gases. However, due to the small pumping speed of the traction molecular pump, too small sealing gap, poor working reliability, easy mechanical failure, and difficult manufacturing, it is rarely used in practice. Later, the traction molecular pump was improved, and the turbo molecular pump appeared.

　　There are many sets of interphase moving impellers and fixed impellers in the turbomolecular pump of the molecular vacuum factory, and each impeller has many blades that are inclined at a certain angle. The actual turbomolecular pump is composed of multi-stage blade series in series, that is, the moving plate, the fixed plate, the moving plate, etc. are arranged alternately in turn. When the moving blade rotates, it is similar to the function of the electric fan blade, which can draw the gas from one side to the other side.