液压缸缸筒总成气密性检测探究

Study on Air Tightness Test of Hydraulic Cylinder Body Assembly

液压缸的密封性能是衡量液压缸品质的一项关键指标。密封性主要体现在是否存在泄漏,包括内泄漏和外泄漏,影响泄漏的因素有很多,诸如液压密封件选用是否合适是否损坏,活塞、缸筒内壁、活塞杆和导向套的加工精度是否达标,液压油液的清洁度等等,都已有相关研究,并取得了有益成果。但关于液压缸筒总成气密性的研究还比较少,缸筒总成中包括很多的焊缝,其材料本身是否存在缺陷,都将导致液压缸泄漏。因此对液压缸筒总成进行气密性检测是很有必要的,能够在液压缸总装之前发现缸筒是否存在漏点以便采取措施,杜绝总装试验后的拆卸导致的一系列人工费,报废等情况出现,有效提高液压缸生产效率。

The sealing performance is a key quality index of hydraulic cylinder.Sealing is mainly manifested in whether there is a leakage,including internal and external leakage.there are many factors that can influence the leakage,such as whether the seal is suitable or damaged,whether the machining accuracy of the piston,the inner wall of cylinder,the piston rod and the stuffing box is up to standard.And the cleanliness of hydraulic oil,etc.Relevant studies have been carried out and beneficial results have been obtained.However,the study on the air tightness of the hydraulic cylinder body assembly is still relatively few.The cylinder body assembly includes a lot of welds,and defects in the material itself will lead to the leakage.Therefore,it is necessary to test the air tightness of the hydraulic cylinder body assembly.The leakage points can be find out before the final assembly of the hydraulic cylinder,so that can put an end to a series of labour costs and scrap by disassembly after the final cylinder test,effectively improve the production efficiency of the hydraulic cylinder.