Axially sealed vacuum insulation ultralow-temperature rotating joint

Abstract

The invention relates to an axially sealed vacuum insulation ultralow-temperature rotating joint, comprising an inner ring, an outer ring, rolling bodies, axial sealing rings, retainers and dustproof sealing rings, wherein the inner ring and the outer ring are in rotating connection trough the rolling bodies, two axial sealing rings and the retainers for axial sealing are arranged between the inner ring and the outer ring, the end, connected with the outer ring, of the inner ring is provided with the dustproof sealing rings, the retainers are arranged between the two axial sealing rings, and annular vacuum cavities are formed in the inner ring and the outer ring. By adopting axial sealing, the difficulty in machining the inner ring and the outer ring and fit precision requirement of relative rotation are reduced; the annular vacuum cavities are is formed in the inner ring and the outer ring of the rotating joint by adopting the vacuum insulation technology, and the cold conduction between the overflow channel surface and the roller path rotating bearing surface is reduced. The cold loss caused by the frosting and freezing of an original loading arm is solved, the leakage caused by the low-temperature deformation of a rotating component is overcome, the nitrogen protection is unnecessary, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a loading and unloading device for ultra-low temperature media, such as liquid oxygen, liquid nitrogen, LNG and other ultra-low temperature gases or liquids, especially an ultra-low temperature rotary joint for ultra-low temperature medium loading and unloading equipment that needs to be sealed during rotation. Background technique [0002] At present, the rotary joints of domestic fluid loading and unloading arms all adopt radial seals, which have strict requirements on the size of the sealing chamber, which can easily cause leakage. In the case of large changes in high and low temperatures, it is difficult to ensure the sealing performance of the rotary joint after the geometric accuracy of the sealing chamber changes due to the alternating stress. In addition, the rotary joint has to bear the turning moment of the pipe arm in the loading and unloading equipment, so it will not work after a period of use. Leakage occurs. Fur...

AI Technical Summary

Problems solved by technology

[0003] The present invention is to provide an axially-sealed vacuum-insulated ultra-low temperature rotary joint, which is used to solve the problems of difficult rotation and cumbersome operation caused by frost and ice on the surface of the rotary joint when the ultra-low temperature medium circulates in the rotary joint.

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