Single-stage rotary vane type vacuum pump

Abstract

A single-stage rotary vane type vacuum pump. The pump round face between a pump suction port and an exhaust port is provided with a groove; the groove is provided inside with a spacer; the lower right edge of the spacer contacts the outer circular surface of a rotor, and the left end of the spacer is connected with a small shaft; the left end of the small shaft is connected with a rotating arm arranged on the outer side of a left pump cover; the rotor is an eccentric one, a rotary vane is arranged at the maximum eccentric radius, and one end of the rotary vane is in contact with the inner circular surface of the pump body; the rotating shaft of the rotor is in coaxial arrangement with the inner circle of the pump body, and the left end of the rotating shaft is respectively connected with a control handwheel arranged on the outer side of the left pump cover and a rotor balance block; and the control handwheel is provided with a lug boss, the lug boss controls a spiral arm to drive the pacer to return to the groove instantly at each rotation, without touching the rotary vane. The single-stage rotary vane type vacuum pump with rotor provided with only a piece of the rotary vane has significant characteristics of large effective volume for vacuum suction, good sealing performance of rotary vane, high degree of vacuum for the container, and high speed.

Description

technical field [0001] The invention relates to a single-stage rotary vane vacuum pump, in particular to a single-stage rotary vane vacuum pump with only one rotary vane in the rotor. Background technique [0002] At present, in the domestic vacuum pump manufacturing industry, as far as single-stage rotary vane vacuum pumps are concerned, the rotors generally have two, three, or more than three rotary vanes. For example, the patent number is 2005200725337 single-stage rotary vane vacuum pump and the patent number is 2009201880817 single-stage rotary vane vacuum pump, the rotary vanes in the rotor are two pieces; and the patent number is 2009202316412 A small single-stage rotary vane vacuum pump , there are three rotating vanes in the rotor. The main disadvantages of this single-stage rotary vane vacuum pump with multi-rotor rotor structure are: 1. The effective volume of vacuum suction is small, and its maximum effective volume generally does not exceed one-half of the effe...

AI Technical Summary

Problems solved by technology

The main disadvantages of this single-stage rotary vane vacuum pump with multi-rotor rotor structure are: 1. The effective volume of vacuum suction is small, and its maximum effective volume generally does not exceed one-half of the effective volume of the vacuum pump body cavity. ;2. The rotor and the pump body are set eccentrically, the contact sealing pressure between the rotor blade and the pump body is inconsistent, the contact sealing effect is different, and there is a phenomenon of gas leakage

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