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Asymmetric twist-blade roots rotor and design method thereof, and compressor and expander

A design method and asymmetric technology, applied in the mechanical field, can solve problems such as leakage, high noise, and poor flexibility, and achieve the effects of reducing wear, reducing noise, and avoiding pumping action

Active Publication Date: 2022-07-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an asymmetric twisted-lobe Roots rotor and its design method and compression machine and expander, which can increase the parameter design space of the twisted-lobe Roots rotor profile, improve the volumetric efficiency, improve the smoothness of operation, and reduce noise

Method used

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  • Asymmetric twist-blade roots rotor and design method thereof, and compressor and expander
  • Asymmetric twist-blade roots rotor and design method thereof, and compressor and expander
  • Asymmetric twist-blade roots rotor and design method thereof, and compressor and expander

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Embodiment

[0086] A design method for an asymmetric twisted-blade Roots rotor, comprising the following steps:

[0087] 1) Determine the pitch circle radius R p , Aspect ratio and the number of teeth n;

[0088] 2) Generate meshing line S according to the parameters determined in step 1) 6 , so that the highest point f of the meshing line is at Y p The coordinates of the axes reach Y max ;

[0089] Let the tangent point of the pitch circle of the yin and yang rotors be O p , point f at X p O p Y p coordinates in (X f ,Y f ), in the coordinate system X p O p Y p middle, meshing line The parametric equation of is:

[0090]

[0091] Among them, t is a variable, t∈[0,α], u 6 , v 6 , w 6 , α are the relevant design parameters, u 6 , v 6 , the geometric meaning of α is as follows Figure 4 As shown in (a) of , w 6 For adjusting the meshing line S 6 shape. After determining the above parameters, the meshing line S 6 shape is also determined. The highest point of t...

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Abstract

An asymmetric twisted-blade Roots rotor and its design method, a compressor and an expander, comprising a female rotor and a male rotor with the same structure, and a single-tooth tooth profile A of the end face profile of the female rotor 1 B 1 C 1 D 1 E 1 F 1 G 1 H 1 I 1 It consists of eight compound curve segments connected in sequence, and the single-tooth tooth profile A 1 B 1 C 1 D 1 E 1 F 1 G 1 H 1 I 1 Around the female rotor profile line origin O 1 Rotate and then connect them in turn to form the end face profile of the female rotor, and n represents the number of teeth of the profile line; the origin of the profile line of the male rotor end face profile is O 2 , the center distance A between the female rotor end profile and the male rotor profile line is equal to 2 times the pitch circle radius R p Each pair of single-tooth tooth profiles of the two rotors can achieve correct meshing during the rotating meshing process: the present invention also provides a design method of the twisted-blade roots rotor and a compressor and an expander using the rotor. The invention not only overcomes the shortcoming of insufficient space for the design parameters of the original profile line, but also has the advantages of high volumetric efficiency and low noise.

Description

technical field [0001] The invention belongs to the field of machinery, and relates to an asymmetric twist-blade Roots rotor, a design method thereof, a compressor and an expander. Background technique [0002] The twisted-blade Roots compressor is a double-rotor machine, and the axes of the two rotors are parallel to each other. The two rotors mesh with each other in the opposite direction of constant speed rotation, and complete the process of inhalation, transportation and exhaust. Twisted-blade Roots compressors are mostly used in gas pressurization and transportation. Because of their simple structure, convenient use and maintenance, and the characteristics of conveying medium without oil, they have been widely used in petrochemical, food, electric power, pharmaceutical and other national economic sectors. Applications. [0003] The rotor face profile has a significant impact on the overall performance of the twisted-blade Roots compressor. At present, the commonly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/12F04C29/00F01C1/12F01C21/08G06F30/17G06F30/20
CPCF04C18/126F04C29/00F01C1/126F01C21/0809G06F30/17G06F30/20F04C2240/20Y02E10/72
Inventor 李丹童韦炜何志龙胡汪锋许春超
Owner XI AN JIAOTONG UNIV