Double-screw vacuum pump rotor profile

A rotor profile, vacuum pump technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve problems such as increasing processing costs, and achieve the effects of reducing processing costs, compact structure, and high pumping rate

Active Publication Date: 2018-03-23
NINGBO BAOSI ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to facilitate the processing of the traditional vacuum pump profile, the two rotors often choose the same profile, but because the two rotors rotate in opposite directions during operati

Method used

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  • Double-screw vacuum pump rotor profile
  • Double-screw vacuum pump rotor profile
  • Double-screw vacuum pump rotor profile

Examples

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the drawings.

[0029] See figure 1 , The present invention adopts the original single-head twin-screw vacuum pump profile line as the original shape and can be transformed. In the original profile line, two arc connecting lines a curve meshes with another rotor a curve, and b curve meshes with b curve, in order to ensure For the similarity of the profile lines of the two rotors, the profile lines of the two rotors must be exactly the same, so that the yin and yang rotor structures have opposite rotation directions. The profile lines of the present invention mesh with the a curve and the b curve to achieve the symmetry of the profile and ensure The consistency of the yin and yang rotor structure is improved.

[0030] See Figure 2-3 and Figure 4 (a)- Figure 4 (h) The rotor profile of the twin-screw vacuum pump of the present invention is connected from the end to the first involute, adden...

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Abstract

Disclosed is a double-screw vacuum pump rotor profile. One rotor comprises a first involute ab, an addendum circle arc action bc, a point engagement cycloid cd, a second involute de, a first point engagement epicycloid ef, a dedendum circle arc section fg and a second point engagement epicycloid ga which are sequentially connected in an end-to-end mode, and the other rotor has the same structure,wherein a point a is located on the pitch circle, during rotation, the point a is engaged with a cycloid section c'd', the involute ab is engaged with the involute d'e', a point b is engaged with an epicycloid section e'f', the addendum circle arc section bc is engaged with a dedendum circle arc section f'g', a point c is engaged with an epicycloid section g'a', the cycloid section cd is engaged with a point a', the involute de is engaged with an involute a'b', the epicycloid section ef is engaged with a point b', the dedendum circle arc section fg is engaged with the addendum circle arc section b'c', and the epicycloid section ga is engaged with a profile point c'. The structures of the two rotors are the same, and the machining cost is low.

Description

Technical field [0001] The invention belongs to the field of mechanical engineering design, and specifically relates to a rotor profile of a twin-screw vacuum pump. Background technique [0002] The dry twin-screw vacuum pump is a positive displacement oil-free vacuum pump, which is mostly used to obtain a dry, low-polluting high vacuum environment and has a wide range of applications in modern industries. It inherits many advantages such as long mechanical life of the screw, forced suction and exhaust, no wearing parts, reliable operation, low vibration, low noise, stable operation, no surge, etc., and has become a research hotspot in the field of vacuum pumps. [0003] The core components of a twin-screw vacuum pump are two rotors, and the selection of the rotor end profile directly affects the structure of the rotor, thereby affecting the processing mode and operating performance of the vacuum pump. In order to facilitate the processing of the traditional vacuum pump profile, t...

Claims

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Application Information

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IPC IPC(8): F04C18/16
CPCF04C18/16F04C2240/20
Inventor 李丹童何志龙杨显照姬蓝天
Owner NINGBO BAOSI ENERGY EQUIP
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