密封材料对某电液伺服阀密封性能的影响  

Effect of Sealing Materials on Sealing Performance of An Electro-hydraulic Servo Valve

作　　者：王杰 张跃 周锦 WANG Jie;ZHANG Yue;ZHOU Jin(Qing'an Group CO.,Ltd,Xi'an 710077,Shaanxi,China)

机构地区：[1]庆安集团有限公司,陕西西安710077

出　　处：《合成材料老化与应用》2024年第6期27-30,共4页Synthetic Materials Aging and Application

摘　　要：为了模拟某电液伺服阀的具体使用工况,进行了高低温交变循环试验、常温介质试验、高温介质试验及低温介质等试验,通过分析2种密封材料性能变化,探究密封材料对某电液伺服阀密封性能的影响因素,以解决该产品的“冒泡渗油”问题。结果表明:低温环境对密封材料的力学性能无影响,但会使其回弹能力下降,影响产品的密封性能;高温环境会使密封材料发生老化而影响其力学性能,降低产品的密封质量;高低温交变循环环境对密封材料的耐低温性能影响较大,降低产品密封性能;油液会使密封材料发生溶胀,高温环境下溶胀现象更加明显。建议产品设计允许情况下,改变密封圈D/d线径比,增大d尺寸,提升密封圈在低温环境中的密封能力;密封零件贮存和装配前进行除氧封存,以确保密封零件质量;产品设计、机加工等各环节考虑密封材料因溶胀引起的尺寸及力学性能的变化,同时在液压环境中,密封圈在使用前应在油液中浸泡一定时间,使其性能稳定后再使用。To simulate the specific operating conditions of a certain electro-hydraulic servo valve,we conducted tests including high and low temperature alternating cycle test,normal temperature medium test,high temperature medium test and low temperature medium test.By analyzing the performance changes of two sealing materials,the influencing factors of sealing materials on the sealing performance of a certain electro-hydraulic servo valve were explored,in order to solve the problem of"bubbling and oil leakage"of the product.The results show that low temperature environment has no effect on the mechanical properties of sealing materials,but it will reduce their rebound ability and affect the sealing performance of products;High temperature environment can cause aging of sealing materials,affecting their mechanical properties and reducing the sealing quality of products;The alternating high and low temperature cycling environment has a significant impact on the low-temperature resistance performance of sealing materials,which reduces the sealing performance of products;The oil can cause swelling of sealing materials,which is more pronounced in high-temperature environment.It is recommended that the ratio of D/d the sealing ring should be adjusted by increasing the d value to enhance the sealing capacity of the sealing ring in low temperature environments,if the product design permits;Before storing and assembling sealed parts,deoxygenation sealing should be carried out to ensure the quality of the sealed parts;The changes that the size and mechanical properties of the sealing material were caused by swelling should be considered in various aspects such as product design and machining.At the same time,in hydraulic environment,sealing ring should be soaked in oil for a certain period of time before use to stabilize their performance.

关 键 词：密封材料 高低温试验 介质试验 密封性能 

分 类 号：V255.3[一般工业技术—材料科学与工程] TQ336[航空宇航科学与技术—航空宇航制造工程]