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叉车故障的原因分析

来源:http://www.jnhgjx.net/ 日期:2022-06-14 发布人:hangong

叉车起动时,曲轴不能转动的机械故障诊断与修复发动机起动时,在起动系统完好的情况下,按起动开关,起动机有响声而曲轴不能转动,则属于机械故障。引起发动机曲轴不能转动的原因如下所述。

Diagnosis and repair of mechanical fault that the crankshaft cannot rotate when the forklift starts. When the engine starts, press the start switch when the starting system is in good condition. If the starter makes a sound and the crankshaft cannot rotate, it is a mechanical fault. The reasons that cause the engine crankshaft to not rotate are as follows.
①起动机与飞轮齿啮合不良。齿圈与起动机齿轮在起动发动机时会发生撞击,造成牙齿损坏或牙齿单面磨损。若牙齿连续三个以上损坏或磨损严重,起动机齿轮与齿圈牙齿便难以啮合。
① Poor engagement between starter and flywheel teeth. When starting the engine, the ring gear and the starter gear will collide, causing tooth damage or tooth wear on one side. If the teeth are damaged or severely worn for more than three consecutive times, it will be difficult for the starter gear to mesh with the ring gear teeth.
②粘缸。发动机温度过高时停车熄火,热量难以散出,高温下的活塞环与气缸粘连,冷却后无法起动。
② Stick the cylinder. When the engine temperature is too high, stop the engine and turn off the engine. The heat is difficult to dissipate. The piston ring and the cylinder are stuck under high temperature and cannot be started after cooling.
③曲轴抱死。由于润滑系故障或缺机油造成滑动轴承干摩擦,以致终抱死曲轴而无法起动。
③ The crankshaft is locked. Due to lubrication system failure or lack of oil, the sliding bearing is subject to dry friction, so that the crankshaft is finally locked and cannot be started.
④喷油泵柱塞卡死。
④ The fuel injection pump plunger is stuck.
叉车起动时可以转动,但不能起动(排气管中无烟)的诊断。起动发动机时,排气管无烟排出,也无爆发声,一般属油路问题,详细分析如下:
The forklift can rotate but cannot start (smoke-free in the exhaust pipe) when starting. When starting the engine, the exhaust pipe is smoke-free and there is no explosion sound. It is generally an oil circuit problem. The detailed analysis is as follows:
①油箱中无油。
① There is no oil in the tank.
⑵燃油滤清器、油水分离器堵塞。
⑵ fuel filter and water separator are blocked.
③低压油路不供油。
③ The low-pressure oil circuit does not supply oil.
④喷油泵不泵油。
④ The fuel injection pump does not pump oil.
⑤油路中有空气。
⑤ There is air in the oil circuit.
⑥配气相位失准。气门的打开时刻与活塞在气缸中的行程不协调。如活塞在气缸中作压缩行程时,进、排气门打开着,新鲜空气被赶出气缸,以致气缸中没有燃烧气体,无法起动。
⑥ Valve timing misalignment. The opening time of the valve is inconsistent with the stroke of the piston in the cylinder. For example, when the piston makes a compression stroke in the cylinder, the inlet and exhaust valves are opened, and the fresh air is driven out of the cylinder, so that there is no combustion gas in the cylinder and it cannot be started.
⑦型喷油泵电磁阀坏,处于关闭状态,柴油不能进入高压腔。
⑦ The solenoid valve of type a fuel injection pump is broken and closed, and diesel cannot enter the high-pressure chamber.
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