スプール弁に作用する流体力の解析 : 第3報,弁の諸元が横力に及ぼす影響(流体工学,流体機械)

概要

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The purpose of this paper is to clarify the valve dimensions required to reduce the lateral flow force on the spool caused by inner flow. The flow path of the examined spool valve with the outlet port near the valve orifice is non-axisymmetric. Numerical simulations of three-dimensional flow, flow visualization and pressure measurement were performed to investigate the magnitude of the lateral force and the relation between the force and flow pattern. The lateral force is mainly caused by a flow pattern in which the jet at the opposite side of the outlet port turns along the spool toward the port. The lateral force depends on the magnitude of the circumferential velocity component as well as the jet impinging pattern and the flow pattern near the outlet port edge. It was found that increasing the axial spool length and the bucket depth effectively reduced the lateral flow force.
社団法人日本機械学会の論文
2002-11-25