用于液压盘式制动缸的橡胶密封件

[中文适用范围]： 该 SAE 标准描述了公路车辆盘式制动卡钳中使用的弹性密封件的性能和零件要求。本规范涵盖的密封件可以是固定安装在缸孔中或可移动活塞上的实心截面类型（方形、矩形、O 形圈等）。该规范包含以下主要部分： [外文原描述]： This SAE Standard describes the performance and part requirements for elastomeric seals used in highway vehicle disc brake calipers. Seals covered by this specification may be the solid section type (square, rectangular, O-ring, etc.) mounted stationary in the cylinder bore or on the movable piston. The specification contains the following major sections:aResistance to Fluid at Elevated Temperature—Physical Stability [loose parts in 120 °C ± 2 °C (248 °F ± 3.6 °F) brake fluid for 70 h]bResistance to Fluid at Elevated Temperature—Precipitation Characteristics [loose parts in 120 °C ± 2 °C (248 °F ± 3.6 °F) brake fluid for 70 h]cResistance to Elevated Temperatures in Dry Air [loose parts in 175 °C ± 2 °C (347 °F ± 3.6 °F) air for 22 h]dAmbient Temperature Stroking Test [tested in brake assembly for 500 000 cycles to 7 MPa ± 0.3 MPa (1000 psi ± 50 psi)]eHigh Temperature Stroking Test [tested in brake assembly for 70 h (70 000 strokes) at 120 °C ± 2 °C (248 °F ± 3.6 °F) to 7 MPa ± 0.3 MPa (1000 psi ± 50 psi)]fLow Temperature Leakage Test [tested in brake assembly for 120 h at −40 to −43 °C (−40 to −45.4 °F)]gCycling Humidity Storage Corrosion Test [tested in brake assembly for 14 days at 95% humidity cycling between 21 to 46 °C (69.8 to 114.8 °F)]Cross Reference: ASTMD573,J1703_201408,J1704_201408