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M7150A平面磨床的换向过程是:压力油经先导阀推动进给阀运动,当运动了一定距离时,一路油穿过进给阀快跳槽进入换向阀一端,推动换向阀运动,使工作台换向。但由于压力油自管路1推开钢球(附图),通过管路2 进入管路3至换向阀的一端时,液压油的迅速向上至使钢球亦随油流运动,反复冲击管路3的孔口,长期磨损使钢球易堵住口部,封住油路,造成换向阀不换向,
M7150A surface grinder commutation process is: pressure oil through the pilot valve to promote the movement of the inlet valve, when the movement of a certain distance, all the way through the inlet valve fast jump into the valve into one end of the valve to promote the valve movement, so that work Taiwan commutation. However, as the pressure oil pushes the steel ball (as shown in the figure) from the pipeline 1 and enters the pipeline 3 through the pipeline 2 to one end of the directional valve, the hydraulic oil rapidly moves upward to make the steel ball also move with the oil flow, Piping 3, long-term wear and tear so easy to block the ball mouth, seal the oil, resulting in no change to the valve,