Abstract: To provide necessary information for working out the national standard for y type seals, the authors investigated the stress and displacement fields of y type seals under load. Models used as seals for the test were made of polyurethane rubber. Phtoelostic method was used to measure stress and a new moire-grid method, which requires a grating with dragging along system was used to measure displacement under limited deformation. The fest has shown that the sealing behaviour is mainly dependent on the structure of the sealing lip, which is liable to wearing our.

摘要： 本文从研究Y形橡胶密封件在载荷作用下的应力场和位移场入手,为Y形密封件国标制定工作提供必要的依据。试件采用浇注型聚氨酯橡胶。分别用平面光弹性法测应力,用云纹法测位移,运用云纹——网格组合法(即应用具有拖带座标系的云纹栅)来测量有限变形时试件的位移场,能够集中云纹和网格二种方法的优点,值得进一步探索。试验结果表明,Y型密封件唇口结构是决定密封性能的主要因素,唇部是易损部位。