Single-stage and double-stage switching rotary vane vacuum pump

A rotary vane vacuum pump, single- and double-stage technology, applied in the field of single- and double-stage switching rotary vane vacuum pumps, can solve the problems of increasing customer use costs and inability to switch to use, and achieve the effect of improving space utilization, compact structure, and improving vacuum degree.

Inactive Publication Date: 2018-11-23
ULVAC NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two cannot be switched and used, which increases the cost of customer use

Method used

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  • Single-stage and double-stage switching rotary vane vacuum pump
  • Single-stage and double-stage switching rotary vane vacuum pump
  • Single-stage and double-stage switching rotary vane vacuum pump

Examples

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Embodiment

[0030] A single and double stage switching rotary vane vacuum pump, reference Figure 1-Figure 5 , Including an oil tank 1, a first pump body 7 arranged in the oil tank 1, a front end cover 12 and a rear end cover 6 at both ends of the first pump body 7, a first rotor 702 eccentrically arranged inside the first pump body 7, the first There are more than two first rotary vanes on the rotor 702. In this embodiment, there are 3 first rotary vanes. The first suction port 10 and the first exhaust port 9 are provided on both sides of the upper end of the first pump body 7. , The oil tank 1 is provided with a suction port 101, the end of the first suction port 10 away from the first pump body 7 is welded to the suction port 101 or fixedly connected by a flange, and the bottom of the first pump body 7 is provided with the first pump body 7 The first pumping hole 701 of the pump cavity, the first exhaust valve is provided in the first exhaust port 9, the upper end of the first pump body ...

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Abstract

The invention relates to a single-stage and double-stage switching rotary vane vacuum pump. The pump comprises a first pump body, a front end cover, a rear end cover, a first rotor and a motor, wherein the first rotor is eccentrically arranged in the first pump body, and the motor drives the first rotor to rotate, a first exhaust groove is formed in the upper end of the first pump body, first exhaust ports are formed in the bottom of the first exhaust groove, the first exhaust ports are internally provided with first exhaust valves, a second pump body is arranged between the first pump body and the front end cover in an oil tank, a second rotor which synchronously rotates with the first rotor is eccentrically arranged in the second pump body, the top of the second rotor is provided with asecond air suction port and second exhaust ports, second exhaust valves are arranged in the second exhaust ports, and one end, far away from the second pump body, of the second air suction port communicates with the bottom of the side wall of the first air exhaust groove. According to the pump, the purchasing cost can be reduced, the limit vacuum degree can be improved, and the space utilization efficiency can be improved.

Description

Technical field [0001] The invention relates to the field of vacuum pumps, and more specifically, it relates to a single- and double-stage switching rotary vane vacuum pump. Background technique [0002] Rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. Rotary vane vacuum pump is mainly composed of pump body, rotor, rotary vane, end cover, valve plate, etc. A rotor is eccentrically installed in the pump cavity of the rotary vane vacuum pump , The outer circle of the rotor is tangent to the inner surface of the pump cavity, and two or more rotary vanes are installed in the rotor slot. The principle is: when the rotor rotates, the top of the rotary vane is kept in contact with the inner wall of the pump cavity by centrifugal force and spring tension , The two rotary vanes divide the crescent-shaped space enclosed by the rotor, pump cavity and two end caps into three parts A, B, and C. When the rotor rotates, the volume of the space ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C25/02
CPCF04C25/02
Inventor 张达李柯迪吴青云
Owner ULVAC NINGBO
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