Involute line screw tooth shape of large flow double screw pump

A twin-screw pump, involute technology, used in pumps, rotary piston pumps, rotary piston machines, etc., can solve the problems of small specific flow and large volume, achieve high pressure, large oil storage space, shorten the screw effect of length

Inactive Publication Date: 2009-02-11
浙江中合建投控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these tooth shapes can maintain full sealing, so the pressure is relatively high, but the main disadvantage is that the specific flow rate is relatively small, and the volume is too large for large flow applications.

Method used

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  • Involute line screw tooth shape of large flow double screw pump
  • Involute line screw tooth shape of large flow double screw pump
  • Involute line screw tooth shape of large flow double screw pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The shape of the radial section of the screw, the addendum circle curve is a circular arc line, the dedendum circle curve on the opposite side of the addendum circle is a circular arc line, and the pitch circle curve on the middle side of the addendum circle and the dedendum circle is a circular arc line , the one end point of the dedendum circular solitary line and the one end point of the dedendum circular solitary line are composed of extended cycloids, the distance between the other end point of the dedendum circular solitary line and the first end point of the pitch circle solitary line is composed of extended cycloids, and the addendum circular solitary line An epicycloid is formed between the other end point of the line and the other end point of the pitch circle solitary line; the number of heads of the screw is 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 in conjuncti...

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Abstract

The present invention discloses a kind of screw involute 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 and involute to the other end of the dedendum circle, and the other end of the pitch circle connected via involute 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 and easy manufacture.

Description

technical field [0001] The invention relates to the technical field of design and processing of mechanical parts, in particular to a screw tooth profile of a high-flow twin-screw pump. Background technique [0002] The tooth shape of twin-screw pump screw has cycloid tooth shape (patent number: 99201251.1), Archimedes helix screw tooth shape (patent number: 96236524.6) and involute tooth shape. Although these tooth shapes can maintain full sealing, so the pressure is relatively high, but the main disadvantage is that the specific flow rate is relatively small, and the volume is too large for applications with large flow rates. Compared with the above-mentioned various tooth shapes, the tooth shape of the present invention obviously increases the specific flow rate and reduces the volume on the basis of maintaining the original pressure, but the processing is still more convenient. Contents of the invention [0003] The object of the present invention is to provide an invo...

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 浙江中合建投控股有限公司
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