行业资讯
挖掘机工作无力主要有两点原因
来源：/ 日期：2022-11-28
挖掘机工作量非常的大若不及时保养就可能出现各种故障，下面济南挖掘机租赁厂家对挖掘机工作无力的问题做一个分析：
If the excavator is not maintained in time, various failures may occur. The following is an analysis of the excavator's inability:
（一）发动机功率足够，运转正常，而挖掘机作业速度缓慢，挖掘无力。
（1） The engine has sufficient power and operates normally, while the excavator operates slowly and is unable to excavate.
挖掘机的液压泵多为变量柱塞泵，工作一定时间以后，泵内部零件不可避免的产生磨损，造成内漏，各参数数据不协调，导致流量不足、油温过高，速度缓慢，不能建立起高压，所以动作缓慢无力。对于这类问题须卸下液压泵进行数据测量，确认问题所在，更换不能继续使用的配件，或修复可以继续使用的配件，重新组装后上校验台调试，匹配各回路参数(压力、流量、功率及变量等)。
The hydraulic pumps of excavators are mostly variable piston pumps. After a certain period of operation, the internal parts of the pump will inevitably wear, causing internal leakage. The data of various parameters are not coordinated, resulting in insufficient flow, high oil temperature, slow speed, and failure to establish high pressure, so the action is slow and ineffective. For such problems, it is necessary to remove the hydraulic pump for data measurement, confirm the problem, replace the parts that can no longer be used, or repair the parts that can continue to be used. After reassembly, perform bench testing and debugging, and match the parameters of each circuit (pressure, flow, power, variable, etc.).
挖掘机上一个重要液压元件－多路分配阀，上面有主阀、二次阀、溢流阀、补油阀等。若这些阀所设定的压力达不到标准压力则导致挖掘无力。
An important hydraulic component on the excavator, the multi way distribution valve, has a main safety valve, a secondary valve, an overflow valve, a makeup valve, etc. If the pressure set by these valves does not reach the standard pressure, the excavation will be weak.
另外，若阀杆与阀孔之间因为磨损而间隙过大，阀杆回位不完全、换向不到位，则大量内漏，导致流量不足，速度缓慢。
In addition, if the clearance between the valve stem and the valve hole is too large due to wear, the valve stem return is incomplete and the direction of rotation is not in place, a large amount of internal leakage will occur, resulting in insufficient flow and slow speed.
此类问题，应当卸下多路分配阀，送到实验台进行调试，重新设定所有阀的压力标准压力，阀杆与阀孔之间的间隙即可。
For such problems, the multi way distribution valve should be removed and sent to the test bench for debugging, and the pressure of all valves should be reset to the standard pressure to eliminate the gap between the valve stem and the valve hole.
（二）冷机时一切正常，热机时动作缓慢，挖掘无力。
（2） Everything is normal when the engine is cold, but the action is slow when the engine is hot, and the excavation is weak.
出现这样的问题表明液压泵内部配件磨损严重，须更换泵内易损件，并重新组装、上调试台校验调试。
The occurrence of such a problem indicates that the internal accessories of the hydraulic pump are seriously worn. The wearing parts in the pump must be replaced, and the test bench shall be reassembled and adjusted for calibration and commissioning.
挖掘机整机出现工作缓慢无力现象的另一个主要原因是液压油变质，因此，要注意监控液压油油质(粘度，流动性及有无悬浮物等)，按时更换符合规定的液压油，就能很大程度上避免此类故障的发生。
Another main reason for the slow and weak operation of the excavator is the deterioration of the hydraulic oil. Therefore, we should pay attention to monitoring the quality of the hydraulic oil (viscosity, fluidity and whether there are suspended solids, etc.), and replace the hydraulic oil that meets the requirements on time, which can largely avoid such failures.
There are two main reasons for the excavator's inability to work, which are explained above. If you want to know anything about this, please come to our website Look!
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