长臂挖掘机

省时 省力 省财富

发动机是整个挖掘机修理的动力来源，作用不言而喻非常的重要，但使用时间久了也会有问题产生，下面长臂挖掘机租赁厂家就来讲讲挖掘机发动机启动怎么会转速低。

The engine is the power source for the repair of the entire excavator, and its role is self-evident, but there will be problems after a long time of use. Next, the leasing manufacturer of the long arm excavator will talk about how the excavator engine starts at a low speed.

当长臂挖掘机扭动点火开关时，启动机带动发动机启动时转速太低，明显感觉启动机负荷过大，使发动机不能实现顺利启动该机液压系统由发动机直接带动2个并联变量柱塞泵工作。

When the long arm excavator turns the ignition switch, the speed of the starter when driving the engine to start is too low. It is obvious that the starter load is too large, which makes it impossible for the engine to start smoothly. The hydraulic system of the machine is driven directly by the engine to work with two parallel variable displacement piston pumps.

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小。

When the reversing valves in the control valve group are in the middle position, the oil from the 2 plunger pumps will go directly to the negative flow control valve through the middle channel in the valve group, and the pressure difference generated at both ends of the oil tank orifice will be fed back to the swashplate of the main pump through the orifice, thus reducing the swashplate angle.

主泵排量也随之减少如果2节流孔发生堵塞，产生较大的压力差，就能反馈到主泵上形成大流量状态。

The displacement of the main pump is also reduced. If the 2 orifices are blocked and a large pressure difference is generated, it can be fed back to the main pump to form a large flow state.

使发动机在大负荷情况下而无法启动按照“由简到繁”、“由表及里”的原则逐步查找，终判定发动机是因负载过大而无法启动维修人员在清洗液压油箱的磁力棒时，发现较多铁屑，拆下负流量控制阀时，发现2个节流孔已经完全堵塞清除杂质后，发动机迅速启动，故障消失。

The engine could not be started under heavy load. The engine was found step by step according to the principle of "from simple to complex" and "from the outside to the inside". It was finally determined that the engine could not be started because of excessive load. When the maintenance personnel cleaned the magnetic rod of the hydraulic oil tank, they found many iron filings. When the negative flow control valve was removed, they found that two orifices had been completely blocked to remove impurities. After that, the engine started quickly and the fault disappeared.

挖掘机发动机启动怎么会转速低？以上就是解答内容了，希望能够给您帮助，您有什么问题了解或者需求就来我们网站http://www.dybocheng.com看看吧。

Why does the excavator engine start at low speed? The above is the answer. I hope I can help you. If you have any questions or needs, please come to our website http://www.dybocheng.com Take a look.