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Screw vacuum pump rotor profile

A technology of screw vacuum pump and rotor profile, which is applied in the direction of pumps, pump components, rotary piston pumps, etc., and can solve problems such as one-sidedness

Inactive Publication Date: 2011-04-06
上海戈里流体机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention develops a screw vacuum pump rotor profile on the basis of absorbing the advantages of existing screw vacuum pump profiles at home and abroad, which is a new type of conjugate rotor end face profile, also called self-conjugate profile. The two rotors are exactly the same, which solves the independent and one-sided problem caused by the above-mentioned prior art.

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Embodiment Construction

[0028] The construction of the profile line of the screw vacuum pump rotor end face of the present invention will be described in detail below with reference to the drawings and embodiments.

[0029] see figure 1 , The present invention provides a rotor profile of a screw vacuum pump, which respectively adopts five sections of curves to form the end surface profile of the first rotor 1 and the second rotor 2 . The profile series of the two rotors of the screw vacuum pump are formed by rotors with the same center distance A and different numbers of heads.

[0030] The profiles of the first rotor and the second rotor are composed as follows:

[0031] R 1 is the root circle radius of the first rotor, R 10 is the addendum circle radius of the first rotor.

[0032] R 2 is the radius of the dedendum circle of the second rotor, R 20 is the addendum circle radius of the second rotor.

[0033] R 1 =R 2　 , R 10 =R 20　 , pitch circle R 1j =R 2j =(R 1 +R 10 ) / 2.

[0034] b...

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Abstract

The invention relates to a screw vacuum pump rotor profile. End face profiles of a first rotor and a second rotor consist of five sections of curves respectively, and a profile series of the two rotors of a screw vacuum pump is formed by using the rotors with the same center distance A and different thread numbers. The screw vacuum pump rotor profile is applied to the two rotors, the first rotor and the second rotor are of conjugate rotor end face profiles, and the conjugate rotor end face profiles are totally the same and rotated left and right respectively to form an engaged relationship. The screw vacuum pump using the screw vacuum pump rotor profile can be widely applied in the fields of electronics, semiconductors, chemical industry, food, spaceflight and the like.

Description

technical field [0001] The invention relates to a screw vacuum pump, in particular to a screw rotor profile suitable for a twin-screw vacuum pump. Background technique [0002] The quality of the end surface profile of the screw vacuum pump will directly affect the performance of the screw vacuum pump, such as sealing, efficiency, and area utilization coefficient. Currently popular molded wires on the market include German Ridgler wires, Japanese Dako wires, Taiwan Hanzhong wires, etc. They all have their own characteristics, but they also have their own independent problems. Contents of the invention [0003] The present invention develops a screw vacuum pump rotor profile on the basis of absorbing the advantages of existing screw vacuum pump profiles at home and abroad, which is a new type of conjugate rotor end profile, also known as self-conjugate profile. The two rotors are completely identical, which solves the independent and one-sided problem in the prior art desc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F04C18/16
Inventor 张玉新刘琦
Owner 上海戈里流体机械有限公司
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