金沙手机娱乐网址,奥门金沙手机娱乐网址

您好!欢迎来访金沙手机娱乐网址!关于我们 | 联系我们 | 在线留言
全国统一服务热线
13793968666(来经理)
联系我们
联系人:王经理
联系电话:13793968666
地址:山东省东营市广饶县
租赁动态

长臂挖机密封件的检查及处理

日期:2020-05-29   来源:
当金沙手机娱乐网址长臂挖掘机在作业过程中出现斗杆缸伸缩缓慢无力时,我们应当做如下检查。
When the stick cylinder of the long arm excavator is slowly and powerless during operation, we should check as follows.
1.查看其密封件是否失效,先松开低压腔的油管,放掉腔内液压油,然后启动发动机给高压腔内注入压力油,未见液压油从低压腔的油管中流出,表明斗杆缸活塞密封件密封良好。若密封件失效则会造成低压腔与高压腔的液压油因内泄而互窜。
1. Check whether the seal fails. First loosen the oil pipe in the low-pressure chamber, drain the hydraulic oil in the chamber, and then start the engine to inject 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. If the seal fails, the hydraulic oil in the low-pressure chamber and the high-pressure chamber will be mutually channeled due to internal leakage.
2.查看安全吸油阀是否正常,安全吸油阀是1个双向保护阀,安装在液压缸和液压马达等执行元件上,当液压缸或马达的某一腔产生瞬间高压时,高压腔的高压油就会打开安全吸油阀中的溢流阀进行溢流,同时负压腔安全吸油阀的单向阀打开,从油箱吸油来补充负压,起到保护油路作用。
2. Check whether the safety oil suction valve is normal. The safety oil suction valve is a two-way protection valve, which is installed on the actuator such as the hydraulic cylinder and the hydraulic motor. When a certain cavity of the hydraulic cylinder or the motor produces instantaneous high pressure, the high-pressure oil in the high-pressure cavity will open the relief valve in the safety oil suction valve to overflow. At the same time, the one-way valve of the safety oil suction valve in the negative pressure cavity will open to supplement the negative pressure by oil suction from the oil tank To protect the oil circuit.
由于斗杆缸工作回路上装有2个安全吸油阀,若其中某个安全吸油阀的单向阀失效变成双向直通,或者在溢流阀溢流压力很低时,都会造成该侧油腔的油压不能建立,压力油直接通过单向阀或溢流阀泄入油箱,使斗杆缸动作缓慢无力甚至不能工作。若安全吸油阀存在此故障则操作手柄处于中立位置停机后,斗杆缸会自动缓慢回落,反之若无此现象则可排除安全吸油阀故障。
金沙手机娱乐网址长臂挖掘机租赁
Since two safety oil suction valves are installed on the working circuit of the stick cylinder, if one of the safety oil suction valves fails and becomes two-way through, or when the overflow pressure of the overflow valve is very low, the oil pressure in the oil chamber at this side cannot be established, and the pressure oil is directly discharged into the oil tank through the one-way valve or overflow valve, which makes the stick cylinder slow and weak or even unable to work. If the safety oil suction valve has this fault, the stick cylinder will automatically slow down after the operating handle is in the neutral position to stop, otherwise, the safety oil suction valve fault can be eliminated.
3.检查PPC阀和主控制阀,PPC阀又称先导操纵阀,是一种比例压力控制阀,可依据操作手柄行程的大小输出相应的控制压力及流量,使主控制阀芯存在相应的移动量,从而起到控制执行元件速度的作用。主控制阀中每一根阀芯控制一支油路的通断,若其中某一阀芯磨损、卡滞甚至堵塞,就会降低相应执行元件的油压和流量,造成执行元件动作迟缓甚至无动作。
3. Check PPC valve and main control valve. PPC valve, also known as pilot control valve, is a proportional pressure control valve. It can output corresponding control pressure and flow according to the size of the stroke of the operating handle, so that there is corresponding movement of the main control valve core, so as to control the speed of the actuator. Each valve element in the main control valve controls the on-off of an oil circuit. If one of the valve elements is worn, stuck or even blocked, the oil pressure and flow of the corresponding actuator will be reduced, causing the actuator to act slowly or even without action.
将斗杆缸回路的控制油管调换到工作正常的PPC阀上试机,则该故障消失。
Change the control oil pipe of stick cylinder circuit to PPC valve which works normally and test the machine, then the fault disappears.
  • 13793968666
  • 返回顶部

【金沙手机娱乐网址图片均由网站所有方提供,部分图片来源于网络,如无意中侵犯了某媒体或个人的知识产权,请来信或来电告之,本网站将立即删除。】

XML 地图 | Sitemap 地图