Elastic clamping hoop based on viscoelastic polyurethane layer

Abstract

The invention discloses an elastic clamping hoop based on a viscoelastic polyurethane layer. A surrounding metal framework is of an integrated structure. A first plunger hole and a second plunger holeare machined in the two ends of the surrounding metal framework correspondingly. A first protruding plunger and a second protruding plunger are machined at the two ends of a viscoelastic polyurethanelayer pad correspondingly and matched with the first plunger hole and the second plunger hole of the surrounding metal framework correspondingly, and accordingly, the viscoelastic polyurethane layerpad is mounted on the inner side of the surrounding metal framework. The first protruding plunger and the second protruding plunger are each in a mushroom shape. The surrounding metal framework is a long-strip-shaped metal plate and formed by machining the long-strip-shaped metal plate. The elastic clamping hoop has the characteristics of high temperature resistance, corrosion resistance and oil resistance and is good in abrasion resistance and damping characteristic, simple in structure, easy to machine, convenient to mount and good in rigidity and elasticity, a lining is convenient to replace, and the elastic clamping hoop is applied to the technical field of fixed supporting devices of aeroengine pipe systems.

Description

technical field [0001] The invention relates to an elastic clip based on a viscoelastic polyurethane layer in the technical field of a fixed support device for an aero-engine piping system. Background technique [0002] At present, the clamp is a fixed support device that enhances the rigidity of the pipeline and fastens the position of the pipeline in the pipeline system of the aero-engine. For a long time, the failure of the pipeline system caused by the vibration of the aero-engine has been one of the important problems affecting the reliability of the aero-engine. The structure of the clamp and the lining material of the clamp are one of the main factors affecting the vibration characteristics of the piping system. Clamps must not only meet the conditions of fixing the pipeline and reducing the vibration transmission rate, but also meet the harsh environmental requirements such as high temperature resistance and corrosion resistance. [0003] Traditional clamps are div...

AI Technical Summary

Problems solved by technology

Polymer rubber materials have poor high temperature resistance, corrosion resistance and oil resistance, and their service life is limited in special environments

The metal rubber material is a grid-like structure formed by random winding, superposition and extrusion of several coiled helical wires. It overcomes the shortcomings of polymer rubber materials, but the processing technology is complicated, the weight of the finished product is large, and the price is high. Due to the large number of clips used on aero-engines, the clips made of metal rubber materials cannot meet the design requirements of lightweight design of aero-engines

In addition, the vibration damping characteristics of metal rubber are not obvious enough, and it is difficult to optimize its stiffness and damping characteristics.

[0004] Patent No. 200920007331.2 discloses a two-step method of foaming platform for plastic outer protective pipe polyurethane foam insulation pipe without support. The problem in this patent is that the use of polyurethane foam cannot form a good viscoelastic layer. Due to the strong vibration of the aero-engine, The polyurethane foam structure cannot be used for vibration reduction and fixed support of aero-engine pipelines

[0005] Patent No. 201120209014.6 discloses a special clamp for the adhesive connection process of the inner tube of the pouring polyurethane delivery pipe. The problem in this patent is that the special clamp only plays a fixed role in the adhesive connection of the inner tube of the pouring polyurethane delivery pipe. , can not provide vibration damping, and the special clamp is not equipped with viscoelastic lining material

[0006] Patent No. 201520287960.0 discloses a clamp-type pull-off protection device. The problem in this patent is that the polyurethane material is wrapped on the outer circular surface of the stainless steel clamp, which only plays a protective role.

The combination of polyurethane material and stainless steel clamp cannot provide vibration damping and fixed support

[0007] The clamp structure in the prior art, the traditional aero-engine clamp split structure, is complicated to process and inconvenient to install; the high-temperature resistance, corrosion resistance and oil resistance of traditional polymer rubber materials are poor, and cannot adapt to the harsh working environment of aero-engines; The processing technology of traditional metal rubber materials is complex, the weight of the finished product is large, the price is high, the vibration reduction characteristics are not obvious enough, and it is difficult to change its stiffness and damping characteristics; polymer rubber materials and metal rubber materials have poor wear resistance and elasticity, Limited service life prevents use in extremely harsh environments

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