Dynamical sealing system with heavy caliber in vacuum and low temperature environment

Abstract

The invention discloses a dynamical sealing system with heavy caliber in vacuum and low temperature environment. The dynamical sealing system with heavy caliber in vacuum and low temperature environment comprises a dynamic sealing ring, two static sealing rings and two sets of parallel vacuum pumping system. The dynamic sealing ring comprises an one-piece three lines lip-shaped check ring. Cylindrical blank which is made by plastic material processes successively equidistant three lines lip on the lateral side of the dynamic sealing, which is equal to three lines of seal. Radical direction of the above-mentioned cylindrical blank establishes a through-hole between every two lips. Two sets of parallel vacuum pumping system which is equipped outside the vacuum container exhaust air outside the container by two through-hole between the lips and the static sealing ring is equipped on the installation surface of the dynamic sealing ring. The sealing system of the invention obviously improves the dynamical sealing effect with heavy caliber in vacuum; meanwhile the shaft installation space of the system is small and the requirements of the dynamical sealing effect with heavy caliber in vacuum can be solved in the small installation space; the deformation of lips of optimized sealing ring is large and has recovery effects, which not only make sure the sealing effects but also solve the problem that the sealing ring is worn prematurely.

Description

technical field [0001] The invention belongs to the field of space environment simulation, and in particular relates to a rotary dynamic sealing system used in a vacuum and low temperature environment. Background technique [0002] When a spacecraft uses a solar simulator for vacuum thermal testing in a vacuum container on the ground, the spacecraft is generally mounted on a motion simulator. Adjust the attitude of the spacecraft through the motion simulator, so that the spacecraft receives the irradiation of the beam of the solar simulator at different angles, so as to ensure that the angular relationship between the spacecraft and the solar beam is the same or similar to that of the in-orbit flight condition, or is the same as the overall design The external heat flow environment is the same. The large-diameter rotary dynamic sealing system (usually refers to the diameter above Φ500mm) is one of the key components of the motion simulator, which is used to meet the rotary ...

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Problems solved by technology

However, the working temperature of the above sealing structures is about -25°C to 80°C, which is severely limited by temperature conditions; ordinary rubber sealing rings are prone to premature wear, while magnetic fluid seals and magnetic coupling plates have complex sealing structures and are prone to Problems with leaks and poor vacuum side bearing lubrication

[0005] In view of the various technical problems in the various sealing methods of the prior art, and it is difficult to apply to the working conditions of extremely low temperature in vacuum, it is very necessary to develop a new sealing system used in vacuum low temperature environment

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