Effect of nitrile butadiene rubber hardness on the sealing characteristics of hydraulic O-ring rod seals  

作　　者：Xiaoxuan LI Bingqing WANG Xudong PENG Yuntang LI Xiaolu LI Yuan CHEN Jie JIN 

机构地区：[1]College of Quality and Safety Engineering,China Jiliang University,Hangzhou,310018,China [2]College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou,310018,China [3]College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou,310023,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2024年第1期63-78,共16页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China(No.52005470);the Natural Science Foundation of Zhejiang Province(No.LQ21E050020);the Fundamental Research Funds for the Provincial Universities of Zhejiang(No.2021YW17),China.

摘　　要：The nitrile butadiene rubber(NBR)hardness effect on the sealing characteristics of hydraulic O-ring rod seals is analyzed based on a mixed lubrication elastohydrodynamic model.Parameterized studies are conducted to reveal the mechanism of the influence of rubber hardness on the static and dynamic behavior of seals.The optimized selections of rubber hardness are then investigated under different conditions.Results show that the low hardness seal is prone to stress concentration due to the extrusion effect under high pressure conditions;it is also more prone to leaking.A high hardness seal can better prevent leakage by reducing film thickness but it will cause large frictional power loss and increase the probability of wear failure.The choice of low hardness is recommended to reduce friction with the premise that leakage requirements are met.

关 键 词：Nitrile butadiene rubber(NBR)hardness Sealing characteristics Optimized selection O-ring seal 

分 类 号：TH136[机械工程—机械制造及自动化]