升降机升降平台升降货梯

How should mobile lift be maintained移动式升降机要怎样保养

1. Matters needing attention in homework
Mechanical work should be gentle and smooth, mechanical work should avoid rough, or it will inevitably produce impact load, making frequent mechanical failures, greatly shortening service life. The impact load generated during operation, on the one hand, the mechanical structure parts of the early wear, break, and break, on the other hand, the impact force in the hydraulic system, the impact force will also cause damage to hydraulic components, oil seal and high-pressure oil pipe joint and rubber tube pressure premature failure oil leakage or detonation, overflow valve frequently action oil temperature rise.
2. Prevent air and water from invading hydraulic system
At atmospheric pressure and temperature, the hydraulic tubing contains air with a capacity ratio of 6-8%. When the pressure is reduced, the air will be free from the oil, and the bubble bursts will cause “cavitation” of the hydraulic components and generate noise. A large amount of air entering oil will aggravate the phenomenon of “cavitation”, increase the compressibility of hydraulic oil, make the hydraulic oil unstable, reduce the work efficiency, and make the actuator crawl. In addition, air will also make hydraulic oil oxidize, accelerating oil deterioration.
3. Select suitable hydraulic oil
Hydraulic oil plays the role of cooling, transferring pressure, lubricating and sealing in the hydraulic system. Improper selection of hydraulic oil is the main reason for early failure and decline of durability of the hydraulic system. Hydraulic oil should be selected according to the name specified in the operation manual. In special cases, substitute oil type should be used, and its performance should be the same as that of the original brand. The hydraulic pressure of different brands can not be mixed, in case the hydraulic oil produces chemical reaction, performance changes. Cream – white, dark brown, smelly hydraulic oil is bad oil, can not be used.
4. Prevent solid impurities from mixing into hydraulic system
Clean hydraulic oil is the life of hydraulic system. Hydraulic system has many precision components, some have damping holes, some have gaps and so on. If the solid impurities invade, it will cause the pull of the precision parts, the card, youdao block and so on, which will endanger the safe operation of the hydraulic system. General solid impurity intrusion into the hydraulic system means: oil tools are not clean; Impure hydraulic oil; Hydraulic component chip removal; Careless refueling and maintenance.
5. Maintenance and cleaning of hydraulic oil
The cleaning oil must use the same hydraulic oil as the brand used in the system. The oil temperature is between 45 and 80 degrees. The impurities in the system should be carried away with a large flow as much as possible. The hydraulic system should be cleaned more than three times, after each cleaning, when the oil is hot, all the system. Clean the filter after cleaning, replace the filter core and add new oil.

 1:作业中注意事项

机械作业要柔和平顺,机械作业应避免粗暴,否则必然产生冲击负荷,使机械故障频发,大大缩短使用寿命。作业时产生的冲击负荷,一方面式机械结构件早起磨损、断裂、破碎,一方面使液压系统中产生冲击力,冲击力又会使液压元件损坏,油封和高压油管接头与胶管的压合处过早失效漏油或爆管、溢流阀频繁动作油温上升。

2:防止空气和水入侵液压系统

在常压常温下液压油管中含有容比为6~8%的空气,当压力降低时空气会从油中游离出来,气泡破裂使液压元件“气蚀”,产生噪音。大量的空气进入油中将使“气蚀”现象加剧,液压油压缩性增大,工作不稳定,降低工作效率,执行元件出现工作“爬行”等不良后果。另外,空气还会使液压油氧化,加速油的变质。

3:选择适合的液压油

液压油在液压系统中起着冷却、传递压力、润滑、密封的作用,液压油选择不恰当是液压系统早起故障和耐久性下降的主要原因。应按随机《使用说明书》中规定的牌号选择液压油,特殊情况需要使用代用油式,应力求其性能与原牌号性能相同。不同牌号的液压有不能混合使用,以防液压油产生化学反应、性能发生变化。乳白色、深褐色、有异味的液压油是变质油,不能使用。

4:防止固体杂质混入液压系统

清洁的液压油是液压系统的生命。液压系统中有许多精密偶件,有的有阻尼小孔、有的有缝隙等。若固体杂质入侵将造成精密偶件拉伤、发卡、有道阻塞等,危及液压系统的安全运行。一般固体杂质入侵液压系统的途径有:加油工具不洁;液压油不洁;液压元件脱屑;加油和维修、保养不慎等。

5:液压油的保养及清洗

清洗油必须使用与系统所用牌号相同的液压油,油温在45~80度之间,用大流量尽可能将系统中杂质带走。液压系统要反复清洗三次以上,每次清洗完后,趁油热时将其全部放出系统。清洗完毕再清洗滤清器,更换新滤芯后加注新油。

 



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