用于液压盘式制动缸的橡胶密封件

[中文适用范围]： 本规范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）。 [外文原描述]： This specification 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:1Resistance to Fluid at Elevated Temperature—Physical Stability (loose parts in 120 ±2°C (248 ±3.6°F) brake fluid for 70 h).2Resistance to Fluid at Elevated Temperature—Precipitation Characteristics (loose parts in 120 ±2°C (248 ±3.6°F) brake fluid for 70 h).3Resistance to Elevated Temperatures in Dry Air (loose parts in 175 ±2°C (347 ±3.6°F) air for 22 h).4Ambient Temperature Stroking Test (tested in brake assembly for 500,000 cycles to 7.0 ±0.3 MPa (1000 ±50 psi)).5High Temperature Stroking Test (tested in brake assembly for 70 h (70,000 strokes) at 120 ±2°C (248 ±3.6°F) to 7.0 ±0.3 MPa (1000 ±50 psi)).6Low Temperature Leakage Test (tested in brake assembly for 120 h at −40-42.8°C (−40-45°F)).7Cycling Humidity Storage Corrosion Test (tested in brake assembly for 14 days at 95% humidity cycling between 21-46°C (69.8-114.8°F)).Cross Reference: