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长臂挖掘机常见的故障有哪些?

日期:2021-12-27   来源:http://www.dyqicheng.com/
1. 行走跑偏
1. Walking deviation
该挖掘机发作行走跑偏毛病,在确定行走马达技能情况正常、履带松紧度调整恰当的情况下,作如下排查:
The excavator has the problem of traveling deviation. After confirming that the skills of the traveling motor are normal and the tightness of the crawler is adjusted properly, the following troubleshooting is carried out:
(1) 查看反转接头
(1) View center reverse connector
反转接头处油道许多,相互之间简单勾结。先拆开 2 个行走马达的油管,然后堵死其间 1 个马达油管;再发动发动机,拉动堵死油管马达的换向阀,发现油液压力过低,而没有堵死的液压马达的油孔出油。由此断定反转接头的油道密封欠好。替换反转接头的密封件,毛病不见
There are many oil passages at the center reverse joint, which are simple collusion with each other. First disassemble the oil pipes of two traveling motors, and then block one motor oil pipe between them; Then start the engine and pull the change-over valve of the blocked oil pipe motor. It is found that the oil pressure is too low and the oil outlet of the hydraulic motor is not blocked. It is concluded that the oil passage seal of the center reverse joint is not good. Replace the seal of the center reverse joint, and the fault is not found
(2) 查看组合阀
(2) View combination valve
先查看行走速度慢一侧的行走组合阀。拆开其限压阀上的 2 根油管,用堵头堵住出油口,发动发动机,拉动有堵头组合阀的行走操作手柄,检测油压正常;再拆开另一侧行走组合阀上的 2 根油管,再次发动发动机,调查其限压阀的 2 个油孔无油液流出,由此判别毛病不在组合阀。
加长臂挖掘机出租
First check the travel combination valve on the side with slow travel speed. Disassemble the two oil pipes on the pressure limiting valve, block the oil outlet with plugs, start the engine, pull the travel operating handle of the plug combined valve, and detect that the oil pressure is normal; Then disassemble the two oil pipes on the traveling combination valve on the other side, start the engine again, and investigate that there is no oil flowing out of the two oil holes of the pressure limiting valve, so as to judge that the fault is not in the combination valve.
2. 斗杆油缸弹性缓慢无力
2. Stick cylinder is slow and weak
该长臂挖掘机在作业过程中呈现斗杆油缸弹性缓慢无力毛病,经剖析作如下排查:
The long arm excavator has the problem of slow and weak elasticity of stick cylinder during operation. After analysis, the following troubleshooting is made:
(1) 查看密封件
(1) View seals
若斗杆油缸活塞等处密封件失效,将形成低压腔与高压腔的液压油因内泄而互窜。先松开低压腔的油管,放掉腔内液压油,然后发动发动机给高压腔内写入压力油,未见液压油从低压腔的油管中流出,标明斗杆缸活塞密封件密封杰出。
If the seals at the piston of the stick cylinder fail, the hydraulic oil in the low-pressure chamber and the high-pressure chamber will cross each other due to internal leakage. First loosen the oil pipe in the low-pressure chamber, drain the hydraulic oil in the chamber, and then start the engine to write pressure oil into the high-pressure chamber. No hydraulic oil flows out of the oil pipe in the low-pressure chamber, indicating that the piston seal of the stick cylinder is well sealed.
(2) 查看安全吸油阀
(2) Check the safety oil suction valve
斗杆油缸作业回路上装有 2 个安全吸油阀,若其间某个安全吸油阀的单向阀失效成为双向直通,或许在溢流阀溢流压力很低时,都会形成该侧油腔的油压不能树立,压力油直接经过单向阀或溢流阀泄入油箱,使斗杆缸动作缓慢无力乃至不能作业。
Two safety oil suction valves are installed on the operation circuit of the stick cylinder. If the one-way valve of a safety oil suction valve fails and becomes a two-way straight through, perhaps when the overflow pressure of the overflow valve is very low, the oil pressure in the oil chamber on this side will not be established, and the pressure oil will directly drain into the oil tank through the one-way valve or overflow valve, making the stick cylinder slow, weak or even unable to operate.
安全吸油阀若发作上述毛病,在操作手柄处于中立方位停机后,斗杆油缸会主动缓慢回落。但是该斗杆缸没有发现此种表象,阐明毛病不在安全吸油阀。
If the above problems occur in the safety oil suction valve, the stick cylinder will fall back actively and slowly after the operating handle is stopped in the neutral direction. However, this phenomenon is not found in the stick cylinder, indicating that the fault is not the safety oil suction valve.
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The above is the main content of the extended arm excavator rented to you. Please continue to pay attention to us for more wonderful content: http://www.dyqicheng.com

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