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Damage factors of lifting platform parts造成升降平台零部件的损伤因素

    在大气压下,升降平台液压油可溶解10%左右的空气,在液压系统的高压作用下,在油液中会溶解更多的空气或气体。空气在油液中行程气泡,如果液压油缸工作在极短的时间内,压力在高低压之间迅速变换就会使气泡在高压侧产生高温,在低压侧产生爆裂,如果液压系统的元件表面有凹点和损伤时,液压油就会高速冲向元件表面加速表面的磨损引起泄露。

    液压油缸作为升降平台液压系统的主要执行元件,由于工作过程中活塞杆裸露在外直接和环境相接处,虽然在导向套上装有防尘圈及密封件等,但也难免将尘埃、污物带入液压系统,加速密封件和活塞杆等划伤和磨损,从而引起泄露、颗粒污染为液压元件损坏最快的因素之一。

    由于工作环境潮湿等因素的影响,可能会使水进入液压系统,摩擦会受到空气中的酸或液压油中残存的少量无机酸和水分的化学或电化学作用,降低液压油的润滑性能,使摩擦表面材料不断损失,行程腐蚀磨损。同时水还会造成控制阀的阀杆发生黏连,使控制阀操纵困难划伤密封件造成泄露。

    密封件是由耐油橡胶等材料制成,由于长时间的使用发生老化龟裂,损伤等都会引起系统泄露,当液压系统工作时,液压管路要承受较高的压力,再加上压力不稳产生的交变力,在液压升降平台震动产生震动应力,转配应力等作用下,使管路在材料缺陷处,腐蚀点火损伤处产生应力集中的现象,造成疲劳破坏断裂而漏油,对于橡胶软管则会从高温高压弯曲扭曲严重的地方老化出现变脆和龟裂,最后导致油管爆裂。

Under atmospheric pressure, the lifting platform hydraulic oil can dissolve about 10% of the air, under the pressure of the hydraulic system, in the oil will dissolve more air or gas. Bubbles of air in the oil, if the hydraulic oil cylinder to work in a very short period of time, pressure quickly transform between high and low pressure high temperature can make the bubbles on the high side, burst in the low voltage side, if the element surface is concave points and damage of hydraulic system, hydraulic oil will high-speed rushed to wear on the surface of the component surface acceleration cause leakage.
Hydraulic cylinder as the main components of hydraulic lifting platform system, due to the piston rod in the working process of the bare and environmental place directly, although with a shield and the guide sleeve seals, etc., but also inevitable to dust, dirt into the hydraulic system, accelerate the seal and the piston rod scratches and wear, causing leaks, particle pollution is one of the fastest hydraulic components damage factors.
Due to the influence of wet working environment and other factors, water may enter the hydraulic system, and the friction will be affected by the chemical or electrochemical effects of acid in the air or a small amount of inorganic acid and water remaining in the hydraulic oil, which will reduce the lubrication performance of the hydraulic oil, and make the friction surface material constantly loss, travel corrosion and wear. At the same time, water will cause the valve stem of the control valve to stick together, making it difficult to control the valve to operate and scratch the seal, causing leakage.
Seals are made of oil resistant rubber materials, due to the long time use aging crack, damage will leak in the system, such as when hydraulic system, hydraulic pipeline under high pressure, coupled with pressure instability produced by alternating force, vibration in hydraulic lift platform vibration stress, ZhuanPei under the action of stress, such as, make the line defect in material, corrosion ignition lesions to produce the phenomenon of stress concentration, fatigue damage fracture and the oil, for will be from high temperature and high pressure rubber hose bend distortion is serious place appears variable and chapping, resulting in a blowout.



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