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一台从美国进口的REED牌拖泵,发现摆阀系统换向无力。从摆阀系统压力表看,开始摆动前压力为20MPa,原来S管摆一下,压力同步降为16MPa,但很快(至迟在下次S管摆动前)压力恢复原值:换蓄能器后S管摆一下,压力同步降下来,但还在压力恢复期间,S管就开始摆第二下,这期间压力降幅也大,摆动压力降到14 MPa,造成摆第二下S管摆动力量不够。
A REED brand imported from the United States pump, found swing valve system can not be reversed. Valve system from the swing valve to see the pressure before starting to swing 20MPa, the original S tube pendulum, the pressure is reduced to 16MPa synchronization, but soon (at the next before the S-tube swing) the original value of the pressure recovery: after the replacement of the accumulator S tube pendulum, the pressure synchronization down, but still during the pressure recovery, S tube began to put the second, during which the pressure drop is also large, swing pressure down to 14 MPa, resulting in swinging the second S tube swing force is not enough .