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Technical Briefs

A Multicolumn Envelope Meshing Pair for Single Screw Compressors

[+] Author and Article Information
Weifeng Wu, Quanke Feng

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

J. Mech. Des 131(7), 074505 (Jun 25, 2009) (3 pages) doi:10.1115/1.3151799 History: Received July 12, 2008; Revised May 04, 2009; Published June 25, 2009

This paper introduces a new meshing pair profile envelope by multicolumn in single screw compressors. The screw groove flank of the new meshing pair is a multisegment surface, and the star-wheel tooth flank consisted of multicylindrical surfaces. When the compressor is operating, the position of the contact line on the tooth flank with the screw groove flank uniformly moves in one revolution, which is rather different from the stationary contact position of existing meshing pair profiles. The new meshing pair will result in the improved wear-resistance and longer operation life, lower gas leakage, and higher efficiency of the compressor.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Typical structure of a single screw compressor

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Figure 2

An envelope column on the tooth

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Figure 3

Cross section of the column envelope meshing pair

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Figure 4

Cross-sectional view of the multicolumn envelope meshing pair

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Figure 5

The meshing process of the multicolumn envelope meshing pair

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Figure 6

Cross-sectional view of the envelope columns at u=u0(0≤u0≤H)

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Figure 7

A three-dimensional model of the groove flank on the screw rotor workpiece

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