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What is the purpose of the flange bushing?

2022-10-22

Flange Bushings are used in: packaging machinery, textile machinery, mining machinery, metallurgical machinery, printing machinery, tobacco machinery, forging machinery, various machine tools and interchange machinery transmission connection. For example: pulley, sprocket, gear, propeller, large fan and other various connections; Features: large torque, high precision, convenient and fast assembly and disassembly, simple operation, good positioning, reduced scrap rate of the matched shaft and hub, reusable, and no damage to the mating surface. It is the most ideal and economical choice at present.

The use of the flange bushing is flexible, and it can play a lot of roles. In general, the bushing is a kind of component for equipment protection. The use of the bushing can reduce the wear, vibration and noise of the equipment, and has the effect of anti-corrosion. The use of bushing can also facilitate the maintenance of mechanical equipment and simplify the structure and manufacturing process of equipment. The function of bushing in practical work is closely related to its application environment and purpose.

In moving parts, the wear of parts is caused by long-term friction. When the gap between the shaft and the hole is worn to a certain extent, the parts must be replaced. Therefore, the designer selects the material with lower hardness and better wear resistance as the shaft sleeve or flange bushing during design, which can reduce the wear of the shaft and seat. When the shaft sleeve or bushing is worn to a certain extent, it can be replaced, which can save the cost of replacing the shaft or seat. Generally speaking, The bushing and the seat adopt interference fit, while the bushing and the shaft adopt clearance fit. Because wear is unavoidable in any case, it can only prolong the service life, while the shaft parts are relatively easy to process; Some new designers also don't like this design. They think that this is to increase the cost during manufacturing, but after a period of use, they still need to reform in this way during maintenance. However, the reform is easy to reduce the accuracy of the equipment. The reason is very simple. The secondary processing can not ensure that the location of the seat hole center is supplemented. The shaft sleeve has a low speed at some places, Places with high radial load and high clearance requirements (such as camshaft) are used to replace rolling bearings (in fact, the shaft sleeve is also a kind of sliding bearing). The material is required to be low in hardness and wear-resistant. The inner hole of the shaft sleeve can reach a high fitting accuracy after grinding and scraping. There must be an oil groove for lubricating oil on the inner wall. The lubrication of the shaft sleeve is very important. If it is dry ground, the shaft and shaft sleeve will soon be scrapped. It is recommended to scrape the inner hole wall of the shaft sleeve during installation, In this way, many small pits can be left. The reinforced lubrication bushing and shaft sleeve are selected according to different industrial and mining conditions. The most important conditions are: pressure, velocity, pressure velocity product, lubrication state, load property. Automatic selection of bushing is quick and easy.

The valve rod is worn and can be easily replaced. If flange bushing is not used, parts will be replaced after wear. Therefore, the bushing is replaced (during design, the hardness of the bushing is reduced to make it a wear part in the friction pair). Because of its convenient processing, low replacement cost and easy replacement. Of course, there are guiding functions.