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加长臂挖掘机启动难动作慢是因为什么?

日期:2022-04-06   来源:http://www.dybocheng.com
  近来有用户反映他的加长臂挖掘机存在着启动困难且动作慢的问题,尤其是点火后需要多次启动才能正常启动,机器负荷挺大的,那么这是怎么回事呢?我们一起来分析一下吧。
  Recently, some users have reported that his extended arm excavator has the problem of difficult start and slow action, especially after ignition, it needs to be started for many times to start normally. The machine load is very large, so what is going on? Let's analyze it.
  到达现场启动机器,打了三次才启动成功,而且启动时间长,启动之后操作挖掘机,正常速度很肉,当动作做死之后,发动机还会飘黑烟。打开柴油油箱底放油阀门,观察放出的柴油还是很干净的,并没什么杂质。松开柴油高压泵进油口,钥匙门上电,柴油带压力流出来,无堵塞,排除油路和柴油滤芯堵塞问题。
  Arrived at the scene to start the machine, it took three times to start successfully, and the start time is long. After starting the excavator, the normal speed is very meat, when the action is dead, the engine will also float black smoke. Open the valve at the bottom of the diesel fuel tank and observe that the diesel oil released is clean and has no impurities. Loosen the oil inlet of the diesel high-pressure pump, power on the key door, and the diesel oil flows out with pressure, without blockage, and eliminate the blockage of oil circuit and diesel filter element.
  启动发动机,进入显示器,查看先导压力在3.9mpa,数值在正常范围内。当发动机在怠速时,仪表显示主泵背压10mpa,此时觉得发动机难启动有可能和此有关,正常发动机在怠速状态下,主泵背压应在4mpa左右,当先导锁无论连通还是断开,主泵背压无变化。
  Start the engine and enter the monitor to check that the pilot pressure is 3.9mpa and the value is within the normal range. When the engine is idle, the instrument shows the main pump back pressure of 10mpa, at this time feel that the engine is difficult to start may be related to this, the normal engine in idle state, the main pump back pressure should be about 4mpa, when the pilot lock whether connected or disconnected, the main pump back pressure has no change.
  此时怀疑主控阀阀芯有不在中位的,因为先导锁断开与连通,背压压力无变换,所以怀疑破碎器阀芯有可能出现问题,破碎器没有用,两头油管是堵头堵死的。拆开破碎器阀芯,发现阀芯处于卡滞状态,将阀芯从阀体里抽离出来后用砂纸打磨,清洗干净之后,重新安装,顺利启动。
  At this time, it is suspected that the spool of the main control valve is not in the middle, because the pilot lock is disconnected and connected, and the back pressure does not change, so it is suspected that there may be problems with the spool of the crusher. The crusher has not been used recently, and the two oil pipes are blocked by plugs. Disassemble the breaker spool and find that the spool is stuck. Remove the spool from the valve body and polish it with sandpaper. After cleaning it, reinstall it and start it smoothly.
  启动加长臂挖掘机之后,整车速度还是慢,在动作做死时还有黑烟产生,检查了进气管路和涡轮增压器,没有发现什么异常。断开比例电磁阀插头,整车速度依然还是无变化,测量比例电磁电流整车,随着操作手柄变化而变化,排除了比例电磁阀故障。
  After starting the extended arm excavator, the vehicle speed was still slow, and there was black smoke when the action was dead. After checking the intake pipe and turbocharger, no abnormality was found. Disconnect the plug of the proportional solenoid valve, the vehicle speed is still unchanged, measure the proportional electromagnetic current of the vehicle, change with the operating handle, and eliminate the proportional solenoid valve failure.
  此时怀疑主泵调节器故障,拆下调节器发现主泵调节器的拨叉犯卡,不能自动回位,拆解用清洗剂清洗,重新安装,试车后黑烟消失,速度也恢复了正常。
  At this time, the main pump regulator was suspected to be faulty. When the regulator was removed, it was found that the switch fork of the main pump regulator was stuck and could not automatically return to the position. After disassembly, it was cleaned with cleaning agent and re-installed.
  在这里提醒大家,破碎器这种设备千万不要几台挖机混着用,如果有一台车液压油脏,会污染其他使用机器的液压系统。尽量还是使用自己的,如遇特殊情况不得不使用别人的,还是提前检查一下破碎器为好。
  Here to remind you that the crusher equipment should not be mixed with several excavators. If there is a car hydraulic oil dirty, it will pollute the hydraulic system of other machines. Try to use your own, if you have to use someone else's in special circumstances, or check the crusher in advance.
  加长臂挖掘机启动难动作慢是因为什么?以上讲解内容希望能够帮助到您们,当然如果您的机器平常保养维护的好,那么出现问题的可能性就会大大降低了。有想了解的就来这里www.dybocheng.com咨询吧。
  What is the reason why the long arm excavator is difficult to start and slow? The above explanation of the content I hope to help you, of course, if your machine is usually maintained well, then the possibility of problems will be greatly reduced. Want to know to come here www.dybocheng.com consultation.


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