スクロール圧縮機における歯形間に作用する押接力の解析

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タイトル別名
  • Analysis of Contact Force Acting between Wraps in Scroll Compressor
  • スクロール アッシュクキ ニ オケル ハガタ カン ニ サヨウ スル オウセツリョク ノ カイセキ

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抄録

Scroll compressor has two main leakage paths, i.e. an axial gap and a radial gap. Tangential leakage which flows through the radial gap is prevented by pressing an orbiting scroll wrap against a fixed scroll wrap. The pressing force is called as a contact force. When the contact force is not enough, the tangential leakage increases. In contrast, frictional loss increases when the contact force is excess. In this study, the characteristic of the contact force is examined with taking account of an oil film pressure generated in bearings by which a rotational shaft is supported. The influence of the oil film formed between the wraps on the contact force is also discussed. Generation mechanism of the contact force is clarified by the analytical result. It is also found that the contact force increases due to the oil film thickness formed between the wraps. The analytical model developed in this study allows us to examine the influence of operating condition and design parameters on the contact force.

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