Carbon fiber-wound graphite bearing

Abstract

The invention proposes a carbon fiber-wound graphite bearing. The carbon fiber-wound graphite bearing comprises a machined graphite bearing sleeve, wherein a layer of woven carbon fibers is at least wound on the surface of a carbon material of the graphite bearing sleeve. As one layer of carbon fibers is wound on the surface of the carbon material, the strength of the graphite bearing is improved, the defects of the graphite bearing inlaid with a metal cover under bad working conditions are overcome, and the problem of bearing failure due to easy fall and release of the bearing under the conditioner of higher temperature caused by different thermal expansion coefficients of metal and the carbon material in a metal-inlaid graphite bearing in the prior art is solved. The carbon fiber material and the carbon graphite material are substantially identical in thermal expansion coefficient, so that no loose and fall phenomenon can be generated even if under the condition of high temperature. In addition, the carbon fiber-wound graphite bearing further solves the problems of weakening of corrosion resistance and still incapability of achieving the corrosion resisting effect of a pure carbon graphite material under the condition of having such strong-corrosion liquid as strong acid and strong alkali in the prior art; and the carbon fiber material just can overcome the difficulties.

Description

technical field [0001] The invention relates to a carbon graphite material bearing mainly used in pumps, transportation, metallurgy and other industries and suitable for sliding bearings. Background technique [0002] Bearings are a kind of sliding parts commonly used in the machinery industry. Graphite bearings are carbon bearings developed and developed on the basis of metal bearings with the performance requirements of mechanical equipment. Bearings are divided into rolling bearings and sliding bearings, and the materials are different from metal, non-metal, and composite materials. Graphite bearings are mostly used for sliding bearings, and sliding bearings are divided into radial bearings and thrust bearings. Graphite bearings use graphite materials as the main base material, and are used in the bearings of conveyors, dryers, textile machines, submersible pump motors, etc. in food, beverage, textile, chemical and other industrial sectors. If these parts are used with ...

AI Technical Summary

Problems solved by technology

Graphite bearings are mostly used for sliding bearings, and are divided into: carbon graphite bearings, bronze graphite oil bearings and inlaid graphite bearings. Although carbon graphite materials are fully equipped with a series of characteristics such as high temperature resistance, corrosion resistance, and good self-lubricating properties, because they are brittle materials , when used as a bearing, even if the strength is increased by increasing the wall thickness, its strength is far from enough

Therefore, in the prior art, metals such as steel sleeves, stainless steel, high-strength brass, and ductile iron are usually used as the basic load, and steel sleeves are installed on the outside, and the strength of the bearings is enhanced by thermocompression fit or bonding to solve the problem of strength. not enough problem

Although this kind of bearing with steel sleeve overcomes the problem of insufficient strength, due to the existence of steel parts, its corrosion resistance becomes worse. The chemically corroded metal jacket not only increases the cost, but its corrosion resistance is still impossible to reach that of pure carbon graphite materials, so it limits its application range to a large extent. In addition, at high temperatures, about 600°, due to steel The thermal expansion coefficient of the parts and the carbon graphite material is inconsistent, it is easy to cause the carbon graphite material to fall off from the steel part, causing the bearing to fail

Even in the case of no corrosion and no high temperature, the bearing will rub against other parts to generate heat during operation, and the thermal conductivity of graphite and steel parts is inconsistent. There will be temperature differences between the inner and outer parts of the bearing with this structure, which is prone to blisters and Electrochemical phenomena, and thus bearing failure

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