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长臂挖掘机故障怎么办?

日期:2018-03-23   来源:/
当长臂挖掘机施工完毕停入场地,长时间闲置或者经过雷雨之后再启动时,发现扭动开关之后长臂挖掘机没有反应。 首先应考虑蓄电池是否有电或电源总开关是否正常。维修人员用2根导线分别接在蓄电池的正、负极,将2根导线的另一端进行触碰,发现有较强的火花出现,可判断蓄电池有电。

When the long arm excavator stops after entering the field after construction, after long idle or after thunderstorm, it is found that the long arm excavator has no response after the torsion switch is found. First of all, we should consider whether the battery has electricity or whether the total switch is normal. The maintenance personnel use 2 wires to connect to the positive and negative electrodes of the battery, and touch the other ends of the 2 conductors. It is found that there is a strong spark and can be judged that the battery has electricity.



启动机带动柴油机启动时转速太低,明显感觉启动机负荷过大,使柴油机不能实现顺利启动。 该机液压系统由柴油机直接带动2个并联变量柱塞泵工作,当操纵阀组内各换向阀处于中位时,2柱塞泵的来油分别经阀组内的中间通道直达负流量控制阀,经节流孔回油箱。节流孔两端产生压力差又反馈到主泵斜盘上,从而使斜盘角度减至最小,主泵排量也随之减少。
When the engine drives the diesel engine, the speed is too low. It is obvious that the load of the starting machine is too large, so the diesel engine can not be started smoothly. The hydraulic system of the machine is directly driven by the diesel engine to 2 parallel variable piston pumps. When the valves in the control valve group are in the middle position, the 2 plunger pumps come to the negative flow control valve through the middle passage of the valve group, and then return to the oil tank through the throttle hole. The pressure difference between the two ends of the throttle is fed back to the main pump and the angle of the inclined plate is minimized, and the displacement of the main pump is also reduced.
当长臂挖掘机行驶或作业过程中水温快速升高,直至开锅,水散热器盖处有蒸汽或沸水冒出,水温报警器报警。用电子测速表测得风扇转速在800 r/min以下,明显偏低。 故障原因可能是机器中的液压油污染度偏高,流经热平衡电磁比例阀时将阀芯卡死,使电磁比例阀在工作时不能完全打开,造成风扇转速过低,水温迅速升高。
When the water temperature rises rapidly, the long arm excavator driving or operating in the process until the water boil, steam or boiling water at the radiator cap out, temperature alarm. The speed of the fan is measured below 800 r/min by the electronic velocity meter, which is obviously lower. The cause of the failure is probably that the hydraulic oil contamination in the machine is very high. When the heat balance electromagnetic proportional valve is applied, the spool will be stuck, so that the electromagnetic proportional valve can not be fully opened when working, resulting in the low fan speed and the rapid rise of the water temperature.
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Customer satisfaction is our affirmation. You are welcome to purchase our company's products. We have always thought that you are responsible for products and have always insisted on doing so. Welcome to your visit.

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