Vacuum pump with integrated cam shaft

Abstract

The invention provides a vacuum pump with an integrated cam shaft. The vacuum pump comprises a pump body (1), a cam shaft (2), a blade (3) and a rotor (4) installed in an inner cavity of the pump body (1), wherein a connecting segment (5) is formed at the lower end of the rotor (4), the rotor (4) is of an integral structure with the cam shaft (2) through the connecting segment (5), the rotor (4) is provided with a radial mounting hole (4.1), the blade (3) is mounted in the mounting hole (4.1) in a suspension manner, the mounting hole (4.1) below the blade (3) forms a lower oil inlet cavity (6) for enabling lubricating oil to enter, oil grooves (4.2) communicated with the lower oil inlet cavity (6) are symmetrically formed in the two side walls of the mounting hole (4.1) along the axial direction, a sealing cover (7) used for covering the oil grooves (4.2) is arranged at the top of the rotor (4), and a second oil inlet cavity (8) for enabling the lubricating oil to enter is formed between the sealing cover (7) and the top of the blade (3). The vacuum pump with integrated cam shaft is simple in structure and does not need to be assembled, can be used for effectively guaranteeing the coaxiality, and can be used for effectively avoiding the abrasion of the blade, so that the service life of the blade is prolonged.

Description

technical field [0001] The invention relates to the technical field of vacuum pumps, in particular to a camshaft integrated vacuum pump. Background technique [0002] At present, in the more common camshaft vacuum pumps, the camshaft, the rotor, and the coupling are generally three separate parts. As a result, there are more or less assembly errors caused by assembly, which affect the coaxiality accuracy of the three to a certain extent. [0003] In addition, because the rotor installs the vane through the open slot at the top, after the vane is installed in the open slot, the top of the vane is directly in contact with the cover plate of the pump body. There will be continuous friction between the top of the blade and the cover plate of the pump body, which will cause the top of the blade to wear and seriously affect the service life of the blade. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a camshaft-inte...

AI Technical Summary

Problems solved by technology

[0002] At present, in the more common camshaft vacuum pumps, the camshaft, the rotor, and the coupling are generally three separate parts. There are more or less assembly errors caused by assembly, which affect the coaxiality accuracy of the three to a certain extent

[0003] In addition, because the rotor installs the vane through the open slot at the top, after the vane is installed in the open slot, the top of the vane is directly in contact with the cover plate of the pump body. There will be continuous friction between the top of the blade and the cover plate of the pump body, which will wear the top of the blade and seriously affect the service life of the blade

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