Rotary compensator

Abstract

The invention relates to a rotary compensator. The rotary compensator comprises an outer barrel (1) and an inner barrel (2); the outer barrel is of a diameter-changing structure; the left section of the inner barrel is located in a large-diameter section of the outer barrel; an annular rubber pipe (4) is arranged between the outer barrel and the inner barrel; a baffle ring (3) is arranged on the left side of the annular rubber pipe; a gland (8) is arranged on the right side of the annular rubber pipe; the part, which is located between the baffle ring and the gland, of the inner barrel is a convex part (12); an air nozzle (6) of the annular rubber pipe penetrates through the outer barrel hermetically and is connected with the right end of a guide pipe (5) in a sealed manner; and the left end of the guide pipe extends into a small-diameter section of the outer barrel hermetically. The annular rubber pipe expands due to pressure of liquid, so that sealing between the inner barrel and theouter barrel is realized; the larger the pressure of the liquid is, the closer the contact between the annular rubber pipe and the inner and outer barrels is; when the inner barrel moves in the outerbarrel, the annular rubber pipe is abraded; and as long as the annular rubber pipe is not abraded, the sealing property is not lowered.

Description

technical field [0001] The invention relates to a rotary compensator, which is used for compensating thermal expansion and contraction of thermal pipelines. Background technique [0002] The structure of the rotary compensator generally includes an outer cylinder and an inner cylinder. One end of the inner cylinder extends into the outer cylinder. There is a sealing packing between the outer cylinder and the inner cylinder. The two sides of the sealing packing are clamped to cause radial expansion of the sealing packing. The position of the packing relative to the outer cylinder is fixed, and the inner cylinder and the outer cylinder can rotate relative to each other. When the inner cylinder rotates, there will be friction between the sealing packing, which will wear the sealing packing and cause the sealing performance to decline; in addition, clamping the sealing packing requires applying Sufficient pre-tightening force makes the friction between the sealing packing and th...

AI Technical Summary

Problems solved by technology

[0002] The structure of the rotary compensator generally includes an outer cylinder and an inner cylinder. One end of the inner cylinder extends into the outer cylinder. There is a sealing packing between the outer cylinder and the inner cylinder. The two sides of the sealing packing are clamped to cause radial expansion of the sealing packing. The position of the packing relative to the outer cylinder is fixed, and the inner cylinder and the outer cylinder can rotate relative to each other. When the inner cylinder rotates, there will be friction between the sealing packing, which will wear the sealing packing and cause the sealing performance to decline; in addition, clamping the sealing packing requires applying Sufficient pre-tightening force makes the friction between the sealing packing and the outer cylinder and the inner cylinder at the maximum state, the rotation between the outer cylinder and the inner cylinder is not flexible, and the sealing packing is easy to wear

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