一种低压单向活门开启压力性能优化  

Performance Optimization of a Low Pressure One-way Valve Opening Pressure

作　　者：王梦丽 侯云 郑高峰 束红林 李青华 王永军 WANG Meng-li;HOU Yun;ZHENG Gao-feng;SHU Hong-lin;LI Qing-hua;WANG Yong-jun(Henan Aerospace Hydraulic Pneumatic Technology Co.,Ltd.,Zhengzhou 450048,China;Air-loaded Regional Military Representative Office,Zhengzhou 450015,China)

机构地区：[1]河南航天液压气动技术有限公司,河南郑州450048 [2]空装驻郑州地区军事代表室,河南郑州450015

出　　处：《液压气动与密封》2024年第8期86-90,共5页Hydraulics Pneumatics & Seals

摘　　要：某型号单向活门要求开启压力不大于5 kPa,装配试验时开启压力满足要求,放置15天后开启压力超差,不能满足指标要求。该单向活门主要靠O形圈与锥面贴合密封,未进行限位,随着时间的推移,O形圈被挤压的作用力变大,增大了与锥面的摩擦力,导致单向活门首次开启压力超差,该问题一直是低压单向活门锥面密封结构长期存在的难点。为了解决该问题,从产品结构、工作原理、加工工艺等方面进行了深入分析,认为影响单向活门首次开启压力偏高的原因为弹簧力偏大、弹簧扭转、密封面粘连,并采取了相应的措施,通过试验验证,证明了措施的有效性和可行性,提高了产品的稳定性。The opening pressure of a certain type of one-way value is required to be no more than 5 kPa.The opening pressure meets the requirements during assembly test.After 15 days of placement,the opening pressure is out of tolerance and cannot meet the index requirements.The one-way value mainly rests.The shape ring and the conical surface are fitted and sealed without limitation.As time goes by,the force of the O shape ring is squeezed becomes larger,which increases the friction between the O shape ring and the conical surface,leading to the abnormal pressure of the one-way value when it opens for the first time.This problem has been a long-term difficulty in the sealing structure of the low pressure one-way valve cone.In order to solve this problem,in-depth analysis was made from the aspects of product structure,working principle and processing technology.It was concluded that the reasons affecting the high pressure of one-way value opening for the first time were large spring force,spring torsion and sealing surface adhesion,and corresponding measures were taken.The effectiveness and feasibility of these measures were proved through experiments,and the stability of the product was improved.

关 键 词：单向活门 开启压力超差 锥面密封 密封面粘连 稳定性 

分 类 号：TH138[机械工程—机械制造及自动化] TB42[一般工业技术]