Dynamic seal structure of reciprocating shaft between high temperature gas and high temperature liquid

Abstract

The invention discloses a dynamic sealing structure for a reciprocating movement shaft between high temperature gas and high temperature liquid. A small end of a step flange internally provided with a central hole is installed in a central hole of another flange, the two flanges are partitioned at a radial connecting part via filling materials, and are partitioned at the end of the end face via aheat insulation material board, a heat insulation ceramic coating layer coated on the reciprocating movement shaft is coaxially installed in the two flange holes; the reciprocating movement shaft at one side of a shoulder face in the step flange hole is outwardly successively provided with soft filling materials of three different materials, and then the reciprocating movement shaft is locked viascrew threads, and the external side is a high temperature gas end; the reciprocating movement shaft at the other side of the shoulder face in the step flange hole is outwardly successively provided with a clamping ring limiter for cooperation of a combination sealing ring and an oblique-center spring, and the external side of the clamping ring limiter is a high temperature liquid end. The soft filling materials in the invention mainly take effects of heat insulation and seal of the high temperature gas, the combination sealing ring mainly takes an effect in sealing the high temperature liquid, and after wearing of the filling materials, sealing performance can be improved via adjustment of a locking device.

Description

technical field [0001] The invention relates to a dynamic sealing structure of a reciprocating shaft, in particular to a dynamic sealing structure of a reciprocating shaft between high-temperature gas and high-temperature liquid. Background technique [0002] The sealing of high-temperature gas or liquid is a key problem among the problems to be solved in hydraulic and pneumatic systems working under high temperature conditions. If this problem cannot be solved well, it will affect the normal operation of the system, and even produce accidents, with disastrous consequences. At present, there is no effective solution and device for high-temperature dynamic sealing, especially in the working condition where high-temperature gas and high-temperature liquid exist at the same time. [0003] In some specific environments, the gas temperature is within 500-700°C, and the liquid temperature is within 200-300°C. It is difficult for the existing sealing ring products to ensure a good ...

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