Damping sleeve for metal pipe vibration and noise reduction and coating method

Abstract

The invention discloses a damping sleeve for metal pipe vibration and noise reduction and a coating method. The damping sleeve (1) with the thickness of T is in a more-than-one-half cylinder shape and made of rubber materials. A plurality of cavity holes (2) are formed in the outer surface of the damping sleeve (1). Redundant parts of the two damping sleeves (1) are cut off in the 45-degree direction of the axis to enable the two damping sleeves (1) to define a whole circle and form a pairing damping sleeve. The inner wall of the paring damping sleeve and the outer wall of a metal pipe are evenly painted with glue, the pairing damping sleeve coats the outer wall of the metal pipe, joint closing is carried out on the pairing damping sleeve in the 45-degree included angle direction, then the pairing damping sleeve is wound and tightly tied up through woven belts, and the woven belts are removed after the glue is completely solidified. The thick pairing damping sleeve coats the metal pipe, the impedance sudden change is formed between the metal pipe and the pairing damping sleeve, therefore, vibration energy can be absorbed through the cavity holes in the pairing damping sleeve when vibration is generated on the metal pipe, and the vibration noise of the metal pipe is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal pipeline vibration reduction and noise reduction, in particular to a damping sleeve and a coating method for metal pipeline vibration reduction and noise reduction. Background technique [0002] Metal pipelines play the role of transmitter in equipment vibration, and have the function of "acoustic bridge" for vibration and noise transmission. Therefore, the vibration and noise reduction of metal pipelines has always been the focus of research. Noise measures include: damping cladding of metal pipelines or the use of flexible pipes and other measures. [0003] The damping coating of metal pipelines is one of the most commonly used methods of vibration reduction and noise reduction. Damping coating can effectively attenuate the vibration amplitude of metal pipelines, reduce the transmission direction of vibration along metal pipelines, and also reduce the transmission direction of vibration to metal p...

AI Technical Summary

Problems solved by technology

[0004] All hydraulic system pipelines, hovering system pipelines and seawater cooling system pipelines on domestic ships adopt the damping coating method, that is, the outer surface of the pipelines is coated with damping tape. The damping tape is produced by 3M Company of the United States. The constraining layer of the tape is aluminum foil and the thickness of the aluminum foil layer is 0.2-0.25mm and the thickness of the damping layer is 0.125mm. This method of wrapping the damping tape is relatively complicated during construction, and it is subject to certain restrictions on the construction of ships. many

[0005] The document "Test Method for Vibration Reduction Performance of Pipeline Damping Materials" uses damping tape to dampen and coat metal pipelines. The production process is complex, construction is difficult, and construction quality is difficult to guarantee, thereby reducing the effect of vibration reduction and noise reduction.

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