抄録
Performance of the optimized bearing/seal parts of hydraulic equipment is investigated numerically. The unsteady operating conditions, physical properties of fluids, elastic deformation, and eccentric load are considered. The optimum conditions discussed in this study are the minimum power loss, minimum dimensions, maximum stiffness, and maximum moment-stiffness. The optimum dimensions are given by the maximum stiffness and maximum moment-stiffness based on the maximum load carrying capacity. For the ideally hydrostatic-balanced bearing/seal parts under concentric loads, the required stiffness is small. In the case of the high pressure operation or low viscous fluids, the radius of a restrictor and the film thickness should be small. The performance of the bearing/seal parts are influenced by the phase-shifted load. From the minimum power loss viewpoint, the bearing/seal parts under the dynamic load and constant supply pressure require high stiffness. The elastic deformation of the pad and eccentric load result in a decrease in film thickness and increase in the possibility of metallic contact.
