Single-screw meshing mechanism with reducing generatrix two-time enveloping single-screw meshing molded line

A technology of secondary enveloping and meshing mechanism, applied in mechanical equipment, machine/engine, liquid fuel engine, etc., can solve problems such as leakage, and achieve the effect of broadening the application field

Inactive Publication Date: 2010-02-17
上海孚创螺杆技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the meshing line of the secondary enveloping line of the cylindrical parent surface has an inclination angle of nearly ten degrees
Very easy to cause leakage

Method used

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  • Single-screw meshing mechanism with reducing generatrix two-time enveloping single-screw meshing molded line
  • Single-screw meshing mechanism with reducing generatrix two-time enveloping single-screw meshing molded line
  • Single-screw meshing mechanism with reducing generatrix two-time enveloping single-screw meshing molded line

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Experimental program
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Embodiment Construction

[0025] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0026] The present invention is illustrated below:

[0027] Screw 1 outer diameter d 1 =230mm, outer diameter of star wheel 2 d 2 = d 1 =230mm, the distance between the centerline of the screw 1 and the centerline of the star wheel 2 A=184mm, the tooth depth of the star wheel or the depth of the screw groove e=0.2d 1 =0.2×230=46mm, screw groove width B=34.5mm (see figure 1 ).

[0028] When the center position of the star wheel is h=3mm higher than the center position of the screw, the design and calculation of the double-enveloping single-screw meshing profile of the variable diameter female surface are as follows:

[0029] 1. Determination of parameters r, R, γ of variable diameter generatrix (see image 3 ).

[0030] small end diameter...

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Abstract

The invention discloses a single-screw meshing mechanism with a reducing generatrix enveloping single-screw meshing molded line. The reducing generatrix envelops the single-screw meshing molded line two times, the meshing line of the screw and a star wheel can form a meshing surface with width of about 2mm; simultaneously, an instant contact line vertical to the original meshing line also exists;both of the two places can form a dynamic pressure liquid film, which improves the contact strength of the meshing tooth surface and prolongs the service life of the star wheel. The dip angle of the meshing line can be reduced by half, and thus, the working pressure of the single-screw compressor and an expander can exceed 4MPa and can reach 4MPa-10MPa.The invention widens the application field of the single-screw compressor and the expander.

Description

technical field [0001] The invention relates to the technical field of fluid machinery, in particular to a single-screw engagement mechanism on a single-screw compressor or a single-screw expander. Background technique [0002] Using two straight-line blades, along the center of the screw according to the relative movement specified by the screw, the two sides of the screw groove are directly formed, which is called the straight generatrix profile. This kind of surface processing process is simple, and the tool and tooling are also simple. The star wheel is processed through the forming process. The star wheel indexing error affects the meshing accuracy. The meshing line is a constant straight line, which is easy to wear and the meshing gap is very fast. It becomes larger, the leakage is large, the meshing tooth surface cannot form a dynamic pressure liquid film, and the service life of the star wheel is low. Most of the existing single-screw compressors use this tooth shape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F04C18/16
Inventor 贾安全奚威曾跃波
Owner 上海孚创螺杆技术有限公司
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