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在工程机械行业,特别是装载机用液压缸的密封形式中,广泛采用的是小断面YX密封圈,其材质一般采用聚胺脂材料或耐油橡胶。聚胺脂密封圈以其优良的耐磨性、耐油性和耐压耐温高等优点倍受用户的青睐,但在使用过程中其密封性和使用寿命不尽如人意。滑环式组合密封是一种由滑环和O形圈组合而成的新型密封装置。其中滑环为主密封件,O形圈只起弹性赋能作用和副密封作用。滑环的制作材料极为广泛,依使用工况而定。工程机械用的液压缸中一般采用氟塑料或聚四氟乙烯等材料。液压缸活塞的密封一般采用格来圈式滑环与O形圈组合密封(图1),
In the construction machinery industry, especially in the form of hydraulic cylinder loader loaders, widely used is the small cross-section YX ring, the material generally used polyurethane material or oil-resistant rubber. Polyurethane seal with its excellent wear resistance, oil resistance and high temperature and pressure resistant advantages of much of the user’s favor, but in the course of its sealing and service life is not satisfactory. Slip ring combination seal is a slip ring and O-ring combination of the new seal. One of the main slip ring seal, O-ring only from the role of elastic and secondary sealing role. Slip ring production of a very wide range of materials, depending on the conditions of use may be. Hydraulic cylinders used in construction machinery commonly used fluorine plastic or PTFE and other materials. Cylinder piston seal is generally used to grid ring slip ring and O-ring combination seal (Figure 1),