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O形圈的工作能力与接触表面和按公称应力估价的接触应力的大小有关。在不同结构安装槽内(图1)载荷与O形圈变形程度的关系从前已研究过。载荷P可根据下列方程确定:
The ability of an O-ring to work depends on the size of the contact surface and the contact stress estimated by the nominal stress. The relationship between the load and the deformation of the o-rings in different installation slots (Figure 1) has been studied before. The load P can be determined according to the following equation: