文章摘要
陈家兑,谢庆生,王自勤,田丰果,何 玲.液压式配气系统O型密封圈动密封特性分析[J].润滑与密封,2014,39(11):63-68
液压式配气系统O型密封圈动密封特性分析
  
DOI:10.3969/j.issn.0254-0150.2014.11.014
中文关键词: 液压式配气系统  O型密封圈  动密封  接触压力
英文关键词: hydraulic valve system  O-ring  dynamic sealing  contact pressure
基金项目:
作者单位E-mail
陈家兑 贵州大学现代制造技术教育部重点实验室 chjd97@163.com 
谢庆生 贵州大学现代制造技术教育部重点实验室  
王自勤 贵州大学现代制造技术教育部重点实验室  
田丰果 贵州大学现代制造技术教育部重点实验室  
何 玲 贵州大学现代制造技术教育部重点实验室  
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中文摘要:
      利用ABAQUS软件建立活塞运动速度为4 m/s、介质压力为6 MPa、摩擦因数为0.3的液压式配气系统O型密封圈有限元分析模型,分析不同往复运动速度、预压缩率、介质压力对液压式配气系统O型密封圈动密封特性的影响。结果表明:O型密封圈密封面的接触压力随位移的变化而产生波动,接触压力随介质压力、预压缩率的增大呈线性增大,运动速度对接触压力影响不大,接触压力曲线波动幅度随运动速度、介质压力、预压缩率的增大而增大;O型密封圈与油缸之间接触面的动密封性能优于O型密封圈与活塞之间接触面;O型密封圈在推程时的动密封性能优于回程;预压缩率小于10%时,O型密封圈不能满足该液压式配气系统的动密封要求,要确保O型密封圈的密封性,需要选择合理的预压缩率。
英文摘要:
      The finite element model was established by ABAQUS software for the O-ring in hydraulic valve system with the piston velocity of 4 m/s,medium pressure of 6 MPa,friction coefficient of 0.3. The effect on dynamic sealing property of O-ring in hydraulic valve system by different motion velocity,medium pressure,pre-compression rate and friction coefficient were analyzed. The results indicate that the contact pressure in sealing surface of O-ring fluctuates with the displacement changes. The average contact pressure is increased linearly with the increase of work pressure and pre-compression rate, and motion velocity has little influence on the average contact pressure. The fluctuation of contact pressure curve is increased with the increase of work pressure, pre-compression rate and motion velocity. The dynamic sealing performance of contact surface between O-ring and cylinder is better than that of contact surface between O-ring and piston. The dynamic sealing performance of O-ring in push travel is better than that in return travel. When the pre-compression rate is less than 10%, the dynamic sealing performance of O-ring can not meet dynamic sealing requirements of this hydraulic valve system.To ensure the dynamic sealing of O-ring, it needs to choose the reasonable pre-compression rate.
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