ピストンポンプ・モータにおけるピストンのオイルホワール : 混合潤滑を考慮した数値計算

概要

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A mathematical model of the piston in the cylinder on axial piston pump and motor has been indicated considering asperity contacts of surface roughness. The load carrying capacities by fluid film and asperity contacts acting on the piston have been calculated on the basis of Average-Flow-Model proposed by Patir-Cheng and the contact theory derived by Greenwood-Tripp, respectively. The calculations of the equations of motion have been performed by using Newton-Raphson method. It is clarified that whirling of the piston occurs for the narrow clearance between the piston and the cylinder and a long sealing part, similar to the oil whirl phenomena in journal bearing. The stability criterion of the motion has been examined according to Routh Hurwitz conditions.
1998-02-25