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液压与气动部件中广泛使用的橡胶O形圈是按9833—73规定的尺寸制造的。胶圈重要的几何特性是在直径方向测定的断面径,以及装在构槽中密封固高出密封点的活塞以上部分的尺寸。然而测定这些尺寸有较大的困难。比如用量具千分尺和卡尺会造成较大的误差;由于橡胶低的硬度及在其中应用了测量面积;又如,橡胶圈起伏不平
The rubber O-rings that are widely used in hydraulic and pneumatic components are manufactured to the size specified in 9833-73. The important geometrical characteristics of the apron are the cross-sectional diameter measured in the diameter direction and the size of the portion of the piston above the sealing point installed in the groove. However, the determination of these dimensions have greater difficulties. Such as the use of micrometer and caliper will cause greater error; due to the low hardness of rubber and in which the application of the measurement area; another example, the rubber ring ups and downs