Involute and straight claw type rotor structure for oilless vacuum pump

An oil-free vacuum pump and rotor structure technology, applied in the involute field, can solve the problems of high vibration and noise, short service life, complicated processing technology, etc. Effect

Inactive Publication Date: 2004-07-14
北京依品非标准设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, as an indispensable equipment in vacuum technology equipment - vacuum pump, with the rapid development of science and technology, it is constantly updated, and the structural principle is introduced new. The modern new rotor oil-free vacuum pump has incomparable advantages compared with the traditional vacuum pump. For example, in the national patent 99255371.7 and 01232818.9 and other authorized patents, the designer has clearly recorded the main structure and superior performance of the multi-stage double-claw rotor vacuum pump and the oil-free vacuum pump. There are deficiencies, such as large vibration and noise, high temperature rise, high failure rate, short service life, and complex processing technology and other technical problems
The reason is mainly from the structure of the claw-type rotor. In order to obtain good airtightness when the claws are cross-engaged, cycloidal claws that are difficult to process are used, which makes the claw arms sharp and thin. The above-mentioned problems will inevitably occur in the pump, and it is difficult to meet the ideal design principle requirements for this kind of claw processing and testing.

Method used

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  • Involute and straight claw type rotor structure for oilless vacuum pump
  • Involute and straight claw type rotor structure for oilless vacuum pump
  • Involute and straight claw type rotor structure for oilless vacuum pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0032] 1. The design of the rotor claw shape

[0033] 1), digital point diagram method: use the mature gear involute design theory, select the appropriate calculation formula as follows:

[0034]

[0035]

[0036] In the formula: ro is the radius of the base circle; βi is the tangent line made by any point on the involute line to the system circle, and the angle between the radius of the tangent point and the OX axis; The radius of MO is the angle between the radius OA′ and the OX axis when turning 20° counterclockwise; βi′=βo-βi; is the radian value of βi′; Δβ is an increment, which is the increment of βi′ from 0 as the involute AB gradually expands from point A, and the angle increment is artificially selected for each drawing to obtain the value of βi′.

[0037] n

βi'=nΔβ

Spend

22.5-βi′

Spend

Xi

Yi

Remark

0

20

2.5

11.79

29.58

Involute starting point A

5

...

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PUM

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Abstract

The present invention belongs to the field of vacuum equipment technology. The claw rotor structure includes mainly a claw rotor pair inside pump body with sealer, cooling circular water channel, drive motor and transmission gears. The present invention features one suspended claw rotor pair, and each of the two claw rotor has single claw arm with one concave claw notch. The claw arm has sides in gear involute contour, top in circular arc and claw groove comprising straight line section and arced section. Each pump has two claw rotors, and the claw structure has raised rigidity, smooth running, less vibration and noise, low fault rate and long service life.

Description

technical field [0001] The invention belongs to the field of vacuum technology equipment, and in particular relates to an involute and linear claw rotor structure which can be used for oil-containing or oil-free vacuum pumps or compressors. Background technique [0002] At present, as an indispensable equipment in vacuum technology equipment - vacuum pump, with the rapid development of science and technology, it is constantly updated, and the structural principle is introduced new. The modern new rotor oil-free vacuum pump has incomparable advantages compared with the traditional vacuum pump. For example, in the national patent 99255371.7 and 01232818.9 and other authorized patents, the designer has clearly recorded the main structure and superior performance of the multi-stage double-claw rotor vacuum pump and the oil-free vacuum pump. There are deficiencies, such as large vibration and noise, high temperature rise, high failure rate, short service life, and complex process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/14F04C25/02
Inventor 崔殿龙陶朱秋
Owner 北京依品非标准设备有限公司
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