The oil-free sealing device is used for oil-free dynamic sealing of an in-cylinder piston of the railway wagon brake cylinder, the sealing device comprises an O-shaped sealing ring and a sliding ring arranged on the outer side of the sealing ring in a sleeving mode, the sealing ring is made of rubber, and the sliding ring is made of polytetrafluoroethylene as a base material. Adding copper powder, carbon fibers, molybdenum disulfide and/or graphite; flanges are symmetrically arranged at the two ends of the inner side of the sliding ring and used for limiting the sliding ring in a groove of the piston. The size of the slip ring and the size of the sealing ring meet the following formula: epsilon = (S slip ring + S ring max)/S groove; epsilon is the fullness rate, the S slip ring is the sectional area of the slip ring, the S groove is the sectional area of the groove of the piston, and the S ring max is the maximum sectional area of the sealing ring. The oil-free sealing mode is adopted, the sealing effect is good, the structure is relatively simple, maintenance is easy, cost is low, and the service life is long.
本申请公开了一种用于铁路货车制动缸的无油密封装置,用于铁路货车制动缸的缸内活塞的无油动密封,所述密封装置包括“O形”的密封圈和套设在密封圈外侧的滑环,所述密封圈采用橡胶材质,所述滑环采用聚四氟乙烯为基材,添加铜粉、碳纤、二硫化钼和/或石墨;所述滑环内侧的两端,对称设有凸缘,用于将滑环限位在活塞的沟槽内;所述滑环的尺寸和密封圈的尺寸满足以下公式:ε=(S滑环+S圈max)/S槽;#imgabs0##imgabs1#其中,ε为充满率,S滑环为滑环的截面积,S槽为活塞的沟槽的截面积,S圈max为密封圈的最大截面积。本申请采用无油密封的方式,密封效果较好,且结构相对简单、易于维护、成本低廉、使用寿命较长。
Oil-free sealing device for brake cylinder of railway wagon
一种用于铁路货车制动缸的无油密封装置
2024-06-07
Patent
Electronic Resource
Chinese
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