Ultrasonic Measurement of Clearances of a Rolling-Piston Type Rotary Compressor

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1998
Authors
Kim, Nohyu
Kim, Jinsoo
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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Abstract

Rotary compressor(Fig.1) has been improved in performance by reducing clearances between the roller piston and either the cylinder or sub-bearings which play a key role in the leakage of the compressed refrigerant gas. However, reducing the clearances increases friction loss due to the boundary lubrication between the rolling piston and the cylinder of the rotary compressor. Therefore it is necessary that an optimal clearance height should be determined by balancing two factors, the leakage and the friction. It is difficult, however, to measure the clearance height using conventional contact type measurement techniques such as gap gauge because clearances are not accessible and, more importantly, their sizes change when the compressor is assembled, especially bolted.

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Thu Jan 01 00:00:00 UTC 1998