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1.故障现象某客户反馈数台某型号装载机发生了制动失灵故障。该故障主要表现为制动动作时有时无,制动后不能立即停机。初步分析该故障为制动泵存在问题。2.制动泵工作原理该型装载机制动泵由气缸活塞1、回位弹簧2、活塞杆3、储油杯4、密封垫5、制动泵活塞6、制动泵7等部件组成,如图1所示。在没有制动时,储油杯4与制动泵7液压油腔相通,制动液通过油腔A、油孔B流入油腔C。制动时,压缩空气从进气口进入,推动气缸活塞1克服回位弹簧2的阻力,
1. Symptom A customer feedback several models of loaders brake failure occurred. The failure is mainly manifested as braking sometimes no action, stop immediately after braking. A preliminary analysis of the problem is a problem with the brake pump. 2. Brake pump works This type of loader brake pump by the cylinder piston 1, the return spring 2, the piston rod 3, the oil cup 4, the seal 5, the brake pump piston 6, brake pump 7 and other components, As shown in Figure 1. In the absence of braking, the oil cup 4 is connected with the hydraulic oil chamber of the brake pump 7, and the brake fluid flows into the oil chamber C through the oil chamber A and the oil hole B. Braking, compressed air from the inlet into the cylinder piston 1 to promote resistance to overcome the return spring 2,