スラスト玉軸受のトラクション油中のスピンモーメント

概要

論文の詳細を見る
A thrust ball bearing lubricated in traction fluid has larger spin moment than a bearing lubricated in turbine oil. This is because the rheological characteristics of the traction fluid's limiting shear stress increase steeply when the contact pressure exceeds the glass transition pressure of 0.6〜1 GPa. The monent of the bearing sometimes causes a decrease in the mechanical efficiency of traction drive transmission. In this report, the monent is measured by a compact facility consisting of a hydraulic cylinder with load capacity of 50 kN and a rotational speed of 8000 rpm. The theoretical moment is estimated from the rheological model of elastoplastic fluid and the spin moment analysis of the contact area considering the flash temperature. As a result, it is clear that an equivalent friction coefficient of the thrust ball bearing of 58mm(PCD), curvature ratio of f_0=0.52 (radius of race curvature divided by ball diameter) lubricated in traction fluid is about 0.030 instead of 0.0012 in turbine oil. It is predicted that the moment of the bearing of f_0=0.60 will be halved.
一般社団法人日本機械学会の論文
1990-04-25