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大家知道,表示橡胶密封圈在长期使用中的密封能力的指标之一是橡胶中的应力松弛,应力松弛通常是按照标准方法确定的,并未考虑到密封件工作的特殊性。同时对橡胶密封圈工作能力有很大影响的有各种外面的因素:决定胶圈变形大小和方式的密封部位的结构造型;温度、压力和工作介质的性质等。为了在模拟使用条件下直接测定橡胶密封固的应力,曾推荐用专门的装置。然而这些装置具有许多使其实际使用受到限制的缺点。例如其中未规定介质在高压下对密封件的作用。此外,所试验的密封圈中的应力照例是借助复杂的记录仪表来测定的,而密封件
As we all know, one of the indicators of the sealing ability of rubber seals in long-term use is stress relaxation in rubber. Stress relaxation is usually determined in accordance with standard methods and does not take into account the particularity of the sealing work. At the same time the ability to work rubber seals have a great influence on a variety of external factors: determine the size and manner of apron deformation of the sealing structure of the site modeling; temperature, pressure and the nature of the working medium. In order to simulate the use of direct determination of the rubber seal under the stress, it has been recommended to use a special device. However, these devices have many disadvantages that limit their practical use. For example, there is no regulation of the effect of the medium on the seal under high pressure. In addition, the stress in the tested seal ring is, as usual, determined by means of a complicated recording instrument, whereas the seal