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A kind of screw vacuum pump rotor and screw vacuum pump

A screw vacuum pump and rotor technology, used in pumps, pump components, rotary piston pumps, etc., can solve the problems of inability to adapt to the application performance requirements of the application, the single shape of the profile, and the increase of shape parameters, etc., to solve the problem of space retention area. , The ultimate vacuum degree is high, the effect of eliminating sharp points

Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there is not enough variable space for the shape parameters of the screw vacuum pump rotor profile, which leads to a single profile shape that can be found by optimization, which makes the screw vacuum pump rotor profile using this profile unable to adapt to the current changing applications. With changing application performance requirements, and increasing the variable space of shape parameters, it can also effectively improve the performance of the optimized screw vacuum pump

Method used

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  • A kind of screw vacuum pump rotor and screw vacuum pump
  • A kind of screw vacuum pump rotor and screw vacuum pump
  • A kind of screw vacuum pump rotor and screw vacuum pump

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] see figure 1 , the original screw vacuum pump profile consists of epicycloid segment A 1 A 2 , arc segment A 2 A 3 , the involute segment A 3 A 4 , the involute segment A 4 A 5 , epicycloid segment A 5 A 6 and arc segment A 6 A 1 composed of It can be seen from the figure that this type of line is determined by the parameter r 1 , r 2 With α uniquely determined, there are fewer independent parameters. and since the cusp A 3 The existence of , making the involute segment A 3 A 4 A 5 need to use epicycloid segment A 5 A 6 A correction is made that creates stagnant areas in the rotor space that affect pump performance. Furthermore, this type of line has a cusp A 2 with A 3 , resulting in a large stress concentration problem in the rotor during operation.

[0035] see Figure 2-3 , the screw vacuum pump rotor of the present invent...

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Abstract

The invention discloses screw vacuum pump rotors and a screw vacuum pump. The screw vacuum pump rotors are characterized in that each rotor molded line is composed of an outer pendulum line segment A<1>A<2>, a tooth top arc segment A<2>A<3>, a pseudo polynomial curve segment A<3>A<4>, a pseudo polynomial curve conjugate curve segment A<4>A<5> and a root arc segment A<5> A<1> which are sequentiallyconnected end to end; the tooth top arc segment A<2>A<3> is tangent to the pseudo polynomial curve segment A<3>A<4>; the two rotors have the same rotor molded lines, and can mesh with each other during the rotation process. According to the screw vacuum pump rotors and the screw vacuum pump, the design parameter space for the rotor molded lines is increased, so that the volumetric efficiency, theenergy-saving performance, the stress performance and the like of the optimized screw vacuum pump are improved. Compared with other conventional pump types, the screw vacuum pump has the advantages of being high in ultimate vacuum degree, high in energy efficiency, less prone to loss, compact in structure, high in air pumping rate, free of surge, small in vibration noise and the like.

Description

technical field [0001] The invention belongs to the field of mechanical engineering design, and in particular relates to a screw vacuum pump rotor and a screw vacuum pump. Background technique [0002] The screw vacuum pump is a positive displacement rotary pump, which is mostly used to obtain a dry, low-pollution high-vacuum environment and compress clean gas, and has a wide range of applications in modern industry. It inherits many advantages of rotary machinery, such as long life, reliable operation, small vibration, low noise, stable operation, no surge phenomenon, etc. At the same time, it has high ultimate vacuum, high energy efficiency, no wearing parts such as air valve, forced suction and exhaust , Simple processing and other characteristics, in recent years, it has become the preferred pump type for large and medium-sized dry vacuum pumps. [0003] The core components of the screw vacuum pump are two rotors. The selection of the rotor profile determines the struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/16F04C25/02F04C29/00
CPCF04C18/16F04C25/02F04C29/00F04C2240/20
Inventor 李丹童何志龙韦炜林栋邢子文
Owner XI AN JIAOTONG UNIV
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