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工程机械液压系统管接头常用密封形式主要有平面密封和锥面密封2类,其中平面密封分为E型柱端式密封、A型柱端式密封、铰接螺栓式密封和法兰式密封;锥面密封分为扩口式密封、30°锥式密封、24°锥式密封(即复合密封)和卡套式密封。此外还有其他形式的密封。虽然各种密封形式具体结构不同,但其密封原理均是通过密封件(如O形圈、ED封、铜垫、组合密封垫等)与被密封件之间相互挤压形成密封面,
Hydraulic systems used in construction machinery commonly used in the form of seal sealing plane and cone sealing two categories, including the plane seal is divided into E-type column end seal, A-type column end seal, bolt and seal flange joints; cone Face seal is divided into flared seal, 30 ° cone seal, 24 ° cone seal (ie composite seal) and ferrule seal. In addition there are other forms of seal. Although the specific structure of various forms of sealing different, but its sealing principle is through the seal (such as O-ring, ED seal, copper pad, combination of seals, etc.) and the seals are squeezed between the formation of sealing surface,