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加金沙手机娱乐网址长臂挖掘机出租厂家浅析改装后的故障分析!

日期:2021-01-19   来源:
前段时间有机主提到挖机装了加长臂以后,使用时间长了会感觉无力动力弱,经我们技术人员的检测给出了结论,下面加金沙手机娱乐网址长臂挖掘机出租来为您好好介绍:
Some time ago, the owner mentioned that after the excavator is equipped with a lengthening arm, it will feel powerless and weak when it is used for a long time. After the inspection by our technicians, the conclusion is given. Here is a rental of the lengthening arm excavator to introduce it to you
1、挖机右行走和铲斗无动作,动臂和斗杆动作慢
1. The right travel and bucket of the excavator do not move, and the boom and stick move slowly
 
加金沙手机娱乐网址长臂挖掘机出租
据机老板反应在更换完控制阀总成的密封后即出现此故障。测后泵收铲斗时的压力为1.5Mpa,远小于正常值的28.5Mpa。在准备交换两路的安全阀时,发现故障一侧的安全阀位置上为一堵头而原堵头的位置却安装了安全阀。交换正确位置后机器正常。
According to the owner's reaction, this fault occurred after replacing the seal of the control valve assembly. After measurement, the pressure when the bucket is pumped in is 1.5MPa, which is far less than the normal value of 28.5mpa. When preparing to exchange two-way safety valves, it is found that the position of the safety valve on the fault side is a plug, while the position of the original plug is installed with a safety valve. The machine is normal after changing the correct position.
2、改装成挖机加长臂后,全车慢、无力
2. After refitting into excavator with extended arm, the whole vehicle is slow and powerless
机主反映刚更换了先导泵油封,但更换后工作了十几分钟一直很正常,然后突然就不行了。根据此情况,首先怀疑先导压力不足。经测试先导压力极低,决定分解先导泵。
The owner reported that he had just replaced the oil seal of the pilot pump, but it worked normally for more than ten minutes after the replacement, and then it suddenly failed. Based on this situation, insufficient pilot pressure is suspected first. After testing, the pilot pressure is very low, so it is decided to decompose the pilot pump.
一发现先导泵输入轴的骨架油封已挤出,此原因有两种:一是安装问题,二是该处压力过高。继续分解发现先导泵的油封方向装反。此处才是故障的真正原因,当刚开始工作时,骨架油封没有损坏,仍可正常工作,因骨架油封只能承受低压,故油封很快损坏,导致先导压力油从损坏处泄出。
It is found that the framework oil seal of the input shaft of the pilot pump has been extruded. There are two reasons: one is the installation problem, and the other is the high pressure. It was found that the oil seal of pilot pump was installed in the reverse direction. This is the real cause of the fault. When the framework oil seal was just started to work, it was not damaged and could still work normally. Because the framework oil seal could only bear low pressure, the oil seal was quickly damaged, resulting in the pilot pressure oil leaking from the damaged place.
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