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挖掘机改装后容易发生什么问题?

日期:2019-02-12   来源:
1、挖机右行走和铲斗无动作,动臂和斗杆动作慢
1. The digger moves right and the bucket does not move, the moving arm and the bucket pole move slowly.
据挖机老板反应在替换完控制阀总成的密封后即呈现此毛病。测后泵收铲斗时的压力为1.5Mpa,远小于正常值的28.5Mpa。
According to the response of the owner of the excavator, after replacing the seal of the control valve assembly, the defect appears. After measurement, the pressure of the pump bucket is 1.5 Mpa, which is much lower than the normal value of 28.5 Mpa.
在预备交换两路的阀时,发现毛病一侧的阀方位上为一堵头而原堵头的方位却装置了阀。交换正确方位后机器正常。本来维修人员替换完控制阀总成的密封后,将该组阀的阀与堵头方位装反。
When preparing to exchange two-way valves, it is found that there is a plug on the valve azimuth of the defective side, while the original plug azimuth is equipped with a valve. The machine is normal after the correct azimuth is exchanged. After replacing the seal of the control valve assembly, the original maintenance personnel installed the valve and the plug position of the group of valves in reverse.
2、改装成挖掘机加长臂后,全车慢、无力
2. After refitting the excavator to lengthen the arm, the whole vehicle is slow and weak.
机主反映刚替换了先导泵油封,但替换后作业了十几分钟一向很正常,然后突然就不行了。依据此情况,首要怀疑先导压力缺乏。
The pilot pump oil seal has just been replaced by the host, but it has been working normally for ten minutes after replacement, and then suddenly no longer works. According to this situation, the first suspect is the lack of pilot pressure.
经测验先导压力极低,决议分化先导泵。
After testing, the pilot pressure is very low and the pilot pump is decided to differentiate.
发现先导泵输入轴的骨架油封已挤出,此原因有两种:一是装置问题,二是该处压力过高。持续分化发现先导泵的油封方向装反。
It is found that the skeleton oil seal of the input shaft of the pilot pump has been extruded. There are two reasons for this: one is the device problem, the other is that the pressure is too high. Continuous differentiation found that the oil seal direction of the pilot pump was reversed.
此处才是毛病的原因,当刚开始作业时,骨架油封没有完全损坏,仍可正常作业,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。
This is the reason for the trouble. When the skeleton oil seal is not completely damaged at the beginning of operation, it can still work normally. Because the skeleton oil seal can only withstand low pressure, the oil seal is damaged quickly, leading to the leakage of pressure oil from the damaged place.
3、改装成挖掘机加长臂后,发动机起动后斗杆油缸的活塞杆主动缩回,其它动作正常。
3. After refitting the excavator to lengthen the arm, the piston rod of the bucket rod cylinder retracts actively after the engine starts, and other actions are normal.
经检查,一其他动作正常;二提起动臂后斗杆下沉较快。交换斗杆先导管后毛病仍旧,阐明毛病在控制阀或斗杆油缸,本着先易后难的原则。
After checking, one of the other movements is normal, and the bucket rod sinks faster after the second lifting of the starting arm. The defect of the exchange bucket rod is still the same after the conduit. It is stated that the defect is in the control valve or the bucket rod cylinder, based on the principle of easy first and difficult later.
拆检控制阀杆,发现阀杆卡在活塞杆缩回方位,用橡胶螂头和铜棒轰动后取出阀杆。可见有闪亮铁末,联系斗杆下沉较快。判断毛病本源为加长臂斗杆缸筒拉伤,拆检斗杆油缸后证实。
The control valve stem was disassembled and checked. It was found that the valve stem was stuck in the retracted position of the piston rod. The valve stem was removed after being stirred by a rubber Hydra head and a copper rod. It can be seen that there are shining iron poles, the connection bucket rod sinks faster. The origin of the defect was found to be the pull of the cylinder of the extended arm bucket rod, which was confirmed after the bucket rod cylinder was dismantled and inspected.
以上信息是我们加长臂挖掘机整理发布希望对大家有所帮助我们的网站是: !
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