スクロール圧縮機のスラスト・スライド軸受におけるEHL効果に関する研究（第１報 FEM解析と実験による弾性変形の検証と油閉じ込め作用による油膜圧力上昇）

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This paper presents the concept of Elasto-Hydrodynamic Lubrication(EHL) effect upon the thrust slide-bearings in scroll compressors, which accounts for the superior lubrication characteristics of these bearings. The thrust plate undergoes elastic deformation due to axial loading, resulting in the formation of a uniform fluid wedge between the orbiting and fixed thrust plates, a region with very high induced oil film pressure which, in turn, accounts for the remarkably good lubrication characteristics of the thrust slide-bearing. Furthermore, the high oil film pressure induces further local elastic deformation of the thrust plate, which forms an EHL pocket with the thrust plate, more effectively increasing the oil film pressure between the sliding surfaces, due to its oil shutting-up effect. The formation of the EHL pocket was confirmed with using FEM analysis and lubrication tests on the elastic deformation of the thrust plate. Subsequently the additional increase in oil film pressure, due to the EHL pocket effect, was examined with computer simulations calculating the average Reynolds equation for the boundary of elastic deformation of the thrust plate, where the oil film pressure increase by 6.7% was addressed for a small cooling capacity scroll compressor driven at 3600 rpm with 0.1kW motor, which will result in superior improvement of lubrication performance of the thrust slide bearing of scroll compressor.
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スクロール圧縮機のスラスト・スライド軸受におけるEHL効果に関する研究（第１報 FEM解析と実験による弾性変形の検証と油閉じ込め作用による油膜圧力上昇）

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