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本文从密封节点的变形谐调条件出发,以解析方法来描述双锥密封结构升压和降压的工作过程。提出了各个工作阶段的螺栓力和密封力对压力载荷的解析关系,并试图以简化的力学图解加以直观的说明。分析表明,双锥密封结构的密封性能对预紧力的关系很小,论证了确定预紧力的根据;合理设计的双锥密封结构的主螺栓载荷可控制在1.05～1.1Q_p;并对双锥环的几何参数的选择进行讨论,建议对现行设计规范的双锥环尺寸作一些修改。本文仅是讨论性质,尚有待于试验验证。
In this paper, based on the deformation and harmonic conditions of sealed nodes, the working process of step-up and step-down of double-cone sealing structure is described analytically. The analytical relationship between the bolt force and the sealing force of each working stage to the pressure load is put forward. Attempting to explain the simplified mechanics diagram intuitively. The analysis shows that the sealing performance of the double-cone sealing structure has little relation with the pre-tightening force, and the basis for determining the pre-tightening force is demonstrated. The rationally designed main-bolt load of the double-cone sealing structure can be controlled at 1.05-1.1Q_p, Cone ring geometry parameters are discussed, it is proposed to make some changes to the existing design specifications double cone ring size. This article is only a discussion of the nature of the test yet to be verified.