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Arc screw tooth shape of large flow double screw pump

A technology of twin-screw pump and large flow, which is applied in the direction of pumps, rotary piston pumps, rotary piston machines, etc. It can solve the problems of small specific flow rate, long sealing line, small load capacity, etc., and achieve high pressure and long sealing line Short, less leaky effect

Inactive Publication Date: 2008-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common disadvantages of the above-mentioned tooth shapes are: 1. Small specific flow rate, 2. Small load capacity, 3. Long sealing line

Method used

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  • Arc screw tooth shape of large flow double screw pump
  • Arc screw tooth shape of large flow double screw pump
  • Arc screw tooth shape of large flow double screw pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] 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 end point of the dedendum circular solitary line and one end point of the dedendum circular solitary line is composed of an extended cycloid, the distance between the other end point of the dedendum circular solitary line and the end point of the pitch circle solitary line is composed of an arc line, and the addendum circular solitary line The distance between the other end point and the other end point of the pitch circle arc line is composed of an arc line and an epicycloid; the number of heads of the screw rod is n≥1, and the length of the screw rod is greater than the length of two pitches.

[0017] The present invention will be described in detail below in con...

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PUM

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Abstract

The present invention discloses a curved screw rod tooth profile of high flow rate two screw pump, and relates to a screw rod with new tooth profile formed from extended cycloid between addendum circle and one end of dedendum circle, curved line between one end of pitch circle and another end of dedendum circle and curved line and external cycloid between another end of pitch circle and another end of addendrum circle. It can be used in screw pump, and it has less leakage, high output pressure, smooth and stable running, high specific flow rate and strong bearing power, etc.

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. However, the common disadvantages of the above-mentioned tooth shapes are: 1. Small specific flow rate, 2. Small load capacity, and 3. Long sealing line. [0003] Compared with the above-mentioned various tooth shapes, the tooth shape of the present invention obviously increases the specific flow rate on the basis of maintaining the original pressure, and the processing is still more convenient. Contents of the invention [0004] The object of the present invention is to provide an arc screw tooth profile of a high-flow twin-screw pump aiming at the deficiencies of the prior art. ...

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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