Screw vacuum pump rotor profile

A screw vacuum pump and rotor profile technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve the problems of incomplete meshing curve, low wear resistance, poor sealing, etc., to improve wear resistance, The effect of high volumetric efficiency and high area utilization factor

Active Publication Date: 2017-02-15
HEFEI UNIV OF TECH +1
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a screw vacuum pump rotor profile to provide a new screw rotor profile to

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Screw vacuum pump rotor profile
  • Screw vacuum pump rotor profile
  • Screw vacuum pump rotor profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Attached below Figure 1-2 A specific implementation manner of a screw vacuum pump rotor profile of the present invention is further described.

[0018] Depend on figure 2 It can be seen that the tooth profile of the screw section is mainly composed of a long epicycloid AB with a radius of R r The dedendum circle BC of radius r 1 -R r The transition circle CG, hypocycloid GD, epicycloid DE, radius R t -r 1 The transition circle EF and radius R t Composed of the addendum circle FA, and the hypocycloid GD and epicycloid DE are smoothly connected at point D, by figure 1 visible figure 2 The formation mechanism of each segment of the curve.

[0019] The formation mechanism of the long epicycloid AB is: the base circle 1 and the generating circle 2 whose radii are both pitch circles, and when the generating circle 2 rolls counterclockwise along the base circle 1 without slipping, it is fixed at a point A on the generating circle 2 The trajectory of the motion is t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a screw vacuum pump rotor profile. The screw vacuum pump rotor profile comprises a prolate epicycloid AB, a root circle BC with radius of Rr, a transition arc CG with radius of r1-Rr, a hypocycloid GD, an epicycloids DE, a transition arc EF with radius of Rt-r1, and an addendum circle FA with radius of Rt. Compared with the prior art, the screw vacuum pump rotor profile is novel conjugated rotor profile; two rotors are totally identical, and are both single-head asymmetric teeth; screw rotors are driven by synchronous gears to correct engage; and in synchronous rotation, any position and rotating angle cannot generate inter-tooth interference to own a complete engagement curve. Meanwhile, the rotors with the profile effectively transfer the torque, and solve leakage of gas from higher-pressure inter-tooth volume to lower-pressure adjacent inter-tooth volume caused by leakage triangle, so that a pump is higher in volume efficiency; and compared with other rotor molded lines, the screw vacuum pump rotor profile is higher in area utilization coefficient and low in machining and detecting costs.

Description

technical field [0001] The invention relates to the technical field of screw vacuum pumps, in particular to a screw rotor profile suitable for twin-screw vacuum pumps. Background technique [0002] The core component of the twin-screw vacuum pump is a pair of non-contact screw rotors that mesh with each other. The screw rotor is designed to avoid tooth surface interference during synchronous meshing movement. Therefore, the research on the profile of the screw rotor is a key technology in the development of dry screw vacuum pumps, and it is also a hot spot in the research of screw pump technology. The quality of its profile will directly affect the performance of the screw pump, such as sealing, area utilization coefficient, theoretical pumping speed, etc., and at the same time determine the processing and manufacturing cost of the screw rotor. Some traditional screw vacuum pump rotor profiles cannot obtain a complete meshing curve, and the front and rear stages of the scre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F04C18/16F04C25/02F04C29/00
CPCF04C18/084F04C18/16F04C25/02F04C2240/20
Inventor 干蜀毅王永庆徐飞潘成程谭昱泉汪祚远许涛王贵
Owner HEFEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap