Three-cavity sliding-vane-type vacuum pump

A vacuum pump and sliding vane technology, applied in rotary piston pumps, pumps, rotary piston/oscillating piston pump components, etc., can solve the problems of low ultimate vacuum, small volume ratio of sliding vane vacuum pumps, etc. Exhaust airflow pulsation, rich profile types, improved vibration effect

Pending Publication Date: 2018-08-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of small internal volume ratio and low ultimate vacuum degree of the sliding vane vacuum pump, a

Method used

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  • Three-cavity sliding-vane-type vacuum pump
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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 As shown, the exploded view is obtained after moving each component in the assembly drawing of the three-cavity vane vacuum pump along the axial direction.

[0039] Such as figure 2 As shown, the suction end cover (1), the pump chamber (2), and the exhaust end cover (5) are all provided with a positioning groove and 3 through holes for fixing; the suction end cover (1), the pump Three identical working chambers are formed between chamber (2), exhaust end cover (5) and rotor (4), including: first working chamber (201), second working chamber (202), third working chamber (203), the three working chambers form 120° rotational symmetry with respect to the center of rotation O point, and are all asymmetrical working chambers; 10 chutes with a certain inclination angle are symmetrically opened on the rotor (4), and the matching chut...

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PUM

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Abstract

The invention discloses a three-cavity sliding-vane-type vacuum pump. The vacuum pump comprises an air suction end cover (1), a pump cavity (2), sliding vanes (3), a rotor (4) and an exhaust end cover(5). A three-working-cavity structure is adopted, three identical closed working cavities are formed among the air suction end cover (1), the pump cavity (2), the exhaust end cover (5) and the rotor(4), the formed closed working cavities are asymmetric working cavities, and the volume of the part, near a corresponding exhaust port, of each working cavity is smaller than the volume of the part, near a corresponding air suction port, of each working cavity. In the working process, the relative positions of the sliding vanes in the different working cavities at any moment are different, therefore, the working steps of the working cavities are not consistent, the three working cavities can be prevented from exhausting air at the same time, and the pulsation of the exhaust gas flow can be reduced. According to the vacuum pump, the inner volume ratio of the three-cavity sliding-vane-type vacuum pump is remarkably improved, the limit vacuum degree of the three-cavity sliding-vane-type vacuum pump is effectively improved, and the problems of vibration and noise caused by exhaust flow pulsation are solved.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to a three-chamber sliding vane vacuum pump. Background technique [0002] The sliding vane vacuum pump is a volumetric fluid machine, relying on the continuous operation of the sliding vane in the pump chamber, the gas is sucked in and compressed by the suction port, and finally discharged from the exhaust port; The advantages are widely used in metallurgy, electronics, medicine, and automobile industries; its key technology is the design of the inner cavity of the pump cavity, and the shape of the inner cavity of the pump cavity directly affects the working performance of the vacuum pump. The working chambers of common sliding vane vacuum pumps are all symmetrical working chambers. The internal volume of this kind of sliding vane vacuum pump is relatively small, and the ultimate vacuum degree of the vacuum pump is low. [0003] The patent with the publication number CN2...

Claims

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Application Information

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IPC IPC(8): F04C29/00F04C18/344F04C25/02G06F17/50
CPCF04C18/344F04C25/02F04C29/00F04C2250/301G06F30/17Y02P20/10
Inventor 王君杨舒然赵峰魏蜀红曹晨燕陈志凯周俊洁
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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