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Screw rotor end face tooth type

A rotor-end, face-tooth technology, used in rotary piston pumps, rotary piston machines, machines/engines, etc., can solve the problems of uneven screw meshing, low product volumetric efficiency, and short screw life, and achieve smooth operation. , space contact line and end face projection optimization, design flexible effect

Inactive Publication Date: 2012-05-23
上海格什特螺杆科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing screw rotor tooth types for twin-screw pumps or twin-screw compressors include cycloid tooth type, Archimedes helical tooth type, circular arc tooth type and involute tooth type. This screw is used for Although the twin-screw pump can theoretically achieve strict (complete) sealing, there are some shortcomings of one kind or another: the length of the contact line is too long, resulting in low volumetric efficiency of the actual product; wear, resulting in poor screw life

Method used

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  • Screw rotor end face tooth type
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  • Screw rotor end face tooth type

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Embodiment Construction

[0018] according to figure 1 The tooth profile of the end surface of the basic screw rotor shown, the tooth curve consists of cycloidal tooth curve abc, circular arc tooth curve cde, circular arc tooth curve ija, elliptic arc tooth curve efg and elliptic envelope tooth curve ghi composition.

[0019] Among them: the three points a, c, g are collinear and the connecting line passes through the center O1, point a is on the addendum circle Ld, points c, d, e are on the dedendum circle Lg, points i, j are on the addendum circle Ld , the tooth curve abc is a long epicycloid generated by the sharp point a on the addendum circle of another screw with the same tooth shape but in the opposite direction. We generally call the tooth curve abc the seal side tooth profile; The curve efg is an elliptical arc, and the tooth curve ghi is an elliptical envelope based on the elliptical arc tooth curve efg on another screw with the same tooth shape but in the opposite direction. We call the too...

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Abstract

The invention relates to a screw rotor end face tooth type for a double-screw pump and a twin screw compressor. The screw rotor end face tooth type is formed by multiple miscellaneous tooth curves, wherein each tooth curve comprises a cycloid curve, a circular arc, a circular arc envelope curve, an ellipse arc, an ellipse arc envelope curve and the like. The screw rotor end face tooth type has the technical characteristics that: the tooth curve on a screw rotor end face is formed by five sections of tooth curves which comprise a cycloid curve tooth curve abc, a circular arc tooth curve cde located on a dedendum circle, a circular arc tooth curve ija located on an addendum circle, an ellipse arc tooth curve efg, and an ellipse arc envelope curve tooth curve ghi by taking the ellipse arc tooth curve efg as a baseline; and a section of circular arc or two sections of circular arcs can be simultaneously added on the two sides of the ellipse arc respectively to form four different combination schemes. The screw rotor end face tooth type provided by the invention can realize strict (complete) seal, and a contact line generated through meshing is shorter; and the double-screw pump or the twin screw compressor produced by applying the invention has the advantages of high volumetric efficiency, high medium pressure capable of being delivered, and the like.

Description

1. Technical field [0001] The invention relates to a screw rotor tooth profile of a twin-screw pump or a twin-screw compressor, which belongs to the improvement technology of the twin-screw machine. 2. Background technology [0002] Existing screw rotor tooth types for twin-screw pumps or twin-screw compressors include cycloid tooth type, Archimedes helical tooth type, circular arc tooth type and involute tooth type. This screw is used for Although the twin-screw pump can theoretically achieve strict (complete) sealing, there are some shortcomings of one kind or another: the length of the contact line is too long, resulting in low volumetric efficiency of the actual product; Wear occurs, resulting in short life of the screw. 3. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a screw rotor tooth type that is not only strictly (completely) sealed, but also has a short contact line length and smooth meshing movemen...

Claims

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Application Information

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IPC IPC(8): F04C2/16
Inventor 李汗强
Owner 上海格什特螺杆科技有限公司
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