本文介绍了超高压透镜环的耐压试验及其密封性能,同时对透镜热预紧力的重要性、合理的预紧力大小、螺栓预紧力的调整现象、透镜垫的自紧性能和日本透镜垫的特点、球面的作用进行了分析,提出了选择透镜垫的预紧力的大小的意见和设计透镜垫的一些依据。 In this paper, the pressure resistance test and sealing performance of the UHV lens ring are introduced. At the same time, the importance of the lens thermal pre-tightening force, the reasonable pre-tightening force, the adjustment of bolt preload, the self-tightening performance of the lens mat, The characteristics of the lens mat, the spherical effect were analyzed, and the suggestion of choosing the size of the preload of the lens mat and some basis for designing the lens mat were presented.