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All-smooth screw rotor of double-screw liquid pump

A twin-screw and liquid pump technology, applied to liquid fuel engines, rotary piston/oscillating piston pump components, pumps, etc., can solve the problem of reducing the volume utilization of twin-screw liquid pumps, the screw rotor is prone to wear, and the pump can be reduced. Service life and other issues, to achieve the effect of enriching the type of end face, improving service life, improving wear resistance and service life

Inactive Publication Date: 2017-08-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used twin-screw liquid pump end surface profile is composed of arc-arc envelope and point meshing cycloid; there are four rough connection points in the end surface profile of the screw rotor, and the screw rotor is prone to wear, reducing the The service life of the pump will increase the leakage of the pump during work, thereby reducing the volume utilization of the twin-screw liquid pump

Method used

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  • All-smooth screw rotor of double-screw liquid pump
  • All-smooth screw rotor of double-screw liquid pump
  • All-smooth screw rotor of double-screw liquid pump

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] Such as figure 1 Shown is the profile diagram of the screw rotor end surface of a commonly used twin-screw liquid pump, consisting of root arc AB, long-width epicycloid BC, epicycloid CD, addendum arc DE, epicycloid EF, long-width Composed of epicycloid FA; there are two rough connection points at the joints of long epicycloid BC, FA and epicycloid CD, EF respectively, and also exist when epicycloid CD and EF are connected with addendum arc DE Two non-smooth connection points; due to the existence of non-smooth connection points, the profile line of the end surface of the screw rotor is not smooth, which reduces the wear resistance and mechanical performance of the screw rotor.

[0047] Such as figure 2 As shown, it is a diagram of the left end surface molding line (501) of the screw rotor of a fully smooth twin-screw liquid pump. The equidis...

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Abstract

The invention discloses an all-smooth screw rotor of a double-screw liquid pump. The all-smooth screw rotor of the double-screw liquid pump is characterized in that a left end surface molded line (501) comprises six circular arc sections, equidistant lines of two prolate epicycloid sections, and equidistant lines of two epicycloid sections, namely, a tooth root circular arc LAB, an equidistant line BC of a first prolate epicycloid, a first transition circular arc CD, an equidistant line DE of a first epicycloid, a first circular arc EF, a tooth top circular arc FGH, a second circular arc HI, an equidistant line IJ of a second prolate epicycloid, a second transition circular arc JK, and an equidistant line KL of a second prolate epicycloid, which are anticlockwise arranged; adjacent curves in the left end surface molded line (501) are in smooth connection, so that unsmooth connecting points are avoided, and an all-smooth end surface molded line is formed; the left end surface molded line (501) is completely the same as a right end surface molded line (502) and can be accurately engaged with the right end surface molded line (502) during the synchronous different-direction double-gyring movement, thus obtaining the all-smooth screw rotor.

Description

technical field [0001] The invention relates to a twin-screw liquid pump, in particular to a fully smooth twin-screw liquid pump screw rotor suitable for the twin-screw liquid pump. Background technique [0002] The twin-screw liquid pump is a positive displacement liquid pump, relying on two intermeshing screw rotors to form multiple closed cavities in the pump body, through the synchronous double-rotation movement of the synchronous gear, the sealed cavities are continuously moved from the suction port To the discharge port, the delivery of liquid is realized. Its core component is a pair of screw rotors meshing with each other, and the design of the end surface profile of the screw rotor directly affects the performance of the pump. The commonly used twin-screw liquid pump end surface profile is composed of arc-arc envelope and point meshing cycloid; there are four rough connection points in the end surface profile of the screw rotor, and the screw rotor is prone to wear...

Claims

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Application Information

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IPC IPC(8): F04C15/00F04C2/16
CPCF04C2/084F04C2/16F04C2240/20
Inventor 王君张凌宏崔锋刘瑞青崔冬刘强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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