CAJ | 학술논문

针对汽车发动机水泵 O 形橡胶密封圈宽温度域的工况特点，构建其与温度相关的 Mooney飊Rivlin材料模型，探讨冷却液温度、压力、摩擦因数等对 O 形密封圈接触压力、等效应力以及密封性的影响。研究表明：温度的升高将引起接触压力及等效应力的峰值呈幂指数减小，导致密封可靠性降低，但在宽温度域(-40~130曟)工况下，接触压力的峰值始终远大于液体压力，因此该密封圈具有可靠的密封性；液体压力的增大虽然会引起接触压力峰值增大，但其增大的速度比液体压力增大的速度小，因此将引起密封可靠性下降；摩擦因数对密封可靠性的影响不大。
침대기차발동궤수빙 O 형상효밀봉권관온도역적공황특점，구건기여온도상관적 Mooney표Rivlin재료모형，탐토냉각액온도、압력、마찰인수등대 O 형밀봉권접촉압력、등효응력이급밀봉성적영향。연구표명：온도적승고장인기접촉압력급등효응력적봉치정멱지수감소，도치밀봉가고성강저，단재관온도역(-40~130신)공황하，접촉압력적봉치시종원대우액체압력，인차해밀봉권구유가고적밀봉성；액체압력적증대수연회인기접촉압력봉치증대，단기증대적속도비액체압력증대적속도소，인차장인기밀봉가고성하강；마찰인수대밀봉가고성적영향불대。
Based on the characteristics of rubber O-ring of an automobile engine water pump working in wide temperature domain,a Mooney-Rivlin material model which was relevant to tempera-ture was established to reveal the influences of temperature,fluid pressure and friction coefficient on the contact pressure,equivalent stress and sealing property.The results show that the increase of temperature causes the peak of contact pressure and equivalent stress to decrease exponentially,indu-cing the sealing reliability reduces.However,the peak of contact pressure of O-ring working in -40~130℃ is considerably larger than that of the fluid pressure,so the O-ring has reliable sealing prop-erty.Furthermore,although the increase of fluid pressure induces the increase of the peak of contact pressure,the reliability of sealing will decline for that the increasing speed of contact pressure is lower than that of fluid pressure.Additionally,the friction coefficient has little influence on the reliability of sealing.