新型双向硬密封大口径旋球阀性能实验分析  

Experimental analysis of seal performance for new-type large diameter rotating ball valve with bidirectional metal sealing

作　　者：雷吉平[1,2] 鄂加强[1] 陈健美[2] 

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082 [2]湖南涉外经济学院机械工程学院,湖南长沙410205

出　　处：《中南大学学报（自然科学版）》2013年第5期1849-1854,共6页Journal of Central South University:Science and Technology

基　　金：湖南省科技计划项目(2011GK3176);湖南省"十二五"重点建设学科资助项目(080204)

摘　　要：为提高新型双向硬密封大口径旋球阀的密封性能,采用双层辉光离子渗金属技术使其球密封面硬化,并对其球密封面的抗擦伤性能和静压寿命进行实验。研究结果表明:硬化后的新型双向硬密封大口径旋球阀球密封面的硬度较高,测量各点的硬度均在42以上,其中,硬度为56的硬化厚度达到0.2 mm,硬度为51的硬化厚度达到0.3 mm,硬度为46的硬化厚度达到0.6 mm;该技术能够同时有效确保其球密封面的硬度和硬化层厚度,能够使其球密封面的抗擦伤性能和静压寿命得到有效提高。In order to enhance the sealing performance of a new-type large diameter rotating ball valve with bidirectional metal sealing, the ball sealing surface of the value was hardened by using the double glow plasma surface alloying technique. The anti-scuffing property and static pressure lifetime of the ball sealing surface were also studied. The hardening test results reveal that its hardness is higher and above 42 in all measurement points. The depths of the hardened layer on hardness of 56, 51 and 46 reach 0.2 mm, 0.3 mm and 0.6 mm, respectively, indicating that this technique can effectively ensure hardness and thickness for the ball sealing surface. This technique can improve the anti-scuffing property and static pressure lifetime.

关 键 词：新型双向硬密封大口径旋球阀 球密封面 双层辉光离子渗金属技术 硬度 静压寿命 

分 类 号：TK730.4[交通运输工程—轮机工程]