Cycloidal screw tooth form of large flow double screw pump

A twin-screw pump, high flow technology, used in pumps, rotary piston pumps, rotary piston machines, etc., can solve problems such as inconvenience in processing, and achieve the effects of high pressure, increased helix angle, and high rigidity

Inactive Publication Date: 2008-07-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All these tooth shapes are composed of two kinds of curves, so the processing is not convenient

Method used

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  • Cycloidal screw tooth form of large flow double screw pump
  • Cycloidal screw tooth form of large flow double screw pump
  • Cycloidal screw tooth form of large flow double screw pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The shape of the radial cross-section of the screw, the addendum circle curve is an isolated circle, the root circle curve on the opposite side of the addendum circle is an isolated circle, the pitch circle curve on the middle side of the addendum circle and the root circle is an isolated line , The end point of the solitary line of the addendum circle and the end point of the solitary line of the tooth root are composed of an extended cycloid, and the other end of the solitary line of the tooth root circle and an end of the solitary line of the pitch circle are composed of an extended cycloid. The other end of the line and the other end of the pitch circle solitary line are composed of an epicycloid; the number of screw heads n≥1, and the length of the screw is greater than the length of two pitches.

[0016] The present invention will be described in detail below with reference to the drawings.

[0017] Such as figure 1 , figure 2 As shown, the shape of the radial cross...

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PUM

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Abstract

The present invention discloses a kind of screw cycloid profile for large flow double screw pump. The screw profile includes addendum circle connected via prolonged cycloid to one end of the dedendum circle, pitch circle with one end connected via prolonged cycloid to the other end of the dedendum circle, and the other end of the pitch circle connected via epicycloid to the other end of the addendum circle. The screw pump with the screws has less leakage, high output pressure, smooth running, great specific flow rate, high bearing capacity and easy manufacture.

Description

Technical field [0001] The invention relates to the technical field of designing and processing mechanical parts, in particular to a cycloid screw tooth profile of a large-flow twin screw pump. Background technique [0002] The tooth profile of the twin screw pump screw includes cycloid tooth profile (patent number: 99201251.1), Archimedes spiral screw tooth profile (patent number: 96236524.6) and involute tooth profile. All these tooth profiles are composed of two kinds of curves, so processing is not convenient. Compared with the various tooth profiles mentioned above, the tooth profile of the present invention is composed of only one type of cycloidal tooth profile, and the processing is relatively convenient. Summary of the invention [0003] The purpose of the present invention is to provide a cycloid screw tooth profile of a large-flow twin screw pump in view of the shortcomings of the prior art. There is an extended cycloid between the addendum circle and the root circle,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/16
CPCF04C2/16
Inventor 陈行
Owner ZHEJIANG UNIV
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