Analyses of thrust bearings in scroll compressors considering keyways

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• 作者：Jinho Kim ; Seung-Ryoul Lee ; Sang-Shin Park
• 关键词：Orbiting scroll ; Non-circular thrust bearing in scroll compressor ; Boundary fitted coordinate
• 刊名：Tribology International
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：43
• 期：4
• 页码：728-736
• 全文大小：954 K

文摘

This work is an attempt to calculate the lubricating characteristics of thrust bearings in scroll compressors, which have non-circular shapes due to the keyways cut for the Oldham's coupling. The outer shapes of these bearings are not circular because the keyways intrude the bearing boundaries. A boundary fitted coordinate technique for hydrodynamic lubrication is modified to handle this non-circularity. The pressure distributions, resultant forces and moments are calculated, which are in equilibrium to the typical conditions generated in the compressing processes. The changes of nominal clearance and tilting angles are obtained during one cycle under the assumption of rigid-body motions.