COMPOSITE SEALING DEVICE

摘要

A composite sealing device, consisting of sealing device blocks (1, 8), n-shaped sealing rings (5, 6) and an O-ring, an Yx-shaped sealing ring or a combination sealing element (10). The inner cavity of each n-shaped sealing ring is hollow, and the sealing force in the inner cavity is directly from the pressure of the working medium and is in self-dynamic balance at any time during operation, and does not affect the working condition of the O-ring, the Yx-shaped sealing ring or the combination sealing element. The composite sealing device combines the properties of the sealing technologies of n-shaped sealing rings as well as O-ring, Yx-shaped ring or combination sealing element, has the characteristics of simple modification and processing, low medium leakage, high pressure resistance and long service life, and can be used as a piston sealing device and an end cover sealing device for various types of hydraulic equipment.