水圧システム用ポンプ・モータに適用する静圧軸受の特性

第1報, 実験

抄録

In this paper, the characteristics of disk-type hydrostatic thrust bearings, simulating the major bearing/seal parts of water hydraulic pumps and motors, have been provided. The bearings are made up by combination of stainless steel/ stainless steel and stainless steel/plastics. The characteristics are evaluated by the relationship among the load capacity, pocket pressure, film thickness and leakage flow rate. The main results obtained are as follows : 1) the load capacity expressed by the ratio of hydrostatic balance is not only dependent of the supply pressure (with the same restrictor) but also of the elastic modulus of materials, 2) effects of inlet pressure drop into the bearing landing are much smaller than those of elastic deformation, especially in plastics, 3) Young's modulus of plastics is dependent of stress acting on their surfaces and is not a constant such as metals.