By using photoelastic experiment of rubber core of lubricator, we can attain the likely reason of destruction,and can provide an evidence for improving design.

• 介绍了利用光弹实验方法在橡胶等制品有限变形条件下应力分析方法，通过防喷器胶芯的光弹实验，得到了其可能引起破坏的原因，为设计改进提供了依据。