Summary:There are many factors that affect the life of tungsten steel bushings. Among the many factors, we n...
There are many factors that affect the life of tungsten steel bushings
. Among the many factors, we need to understand in addition to the reasons for the damage of tungsten steel bushings and the difference in processing technology. For example: in the moving parts, the wear of the 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 chooses lower hardness and higher wear resistance when designing. A good material is tungsten steel bushing, which can reduce the wear of the shaft and seat.
The tungsten steel bushing is worn to a certain extent and needs to be replaced, which can save the cost of replacing the shaft or seat. Generally speaking, the tungsten steel bushing and the seat adopt an interference fit, and a clearance fit with the shaft, because no matter what, it is still impossible to Avoid wear and tear, only prolong life. Shaft parts are relatively easy to process, but this situation cannot be avoided.
Some new designers don't like this setting, thinking that it will increase the cost during manufacture, but after a period of use, it is still necessary to transform in this way during maintenance, but the transformation will easily reduce the accuracy of the equipment. The reason is very simple. Secondary processing is a supplement that cannot guarantee the position of the center of the seat hole. Tungsten steel bushings are used to replace rolling bearings in some places with low rotational speed, high radial load and high clearance requirements (such as camshafts). (In fact, the tungsten steel bushing is also a kind of sliding bearing), the material requires low hardness and wear resistance. The inner hole of the tungsten steel bushing can be ground and scraped to achieve high matching accuracy. There must be an oil groove for lubricating oil on the inner wall. The lubrication of the steel bushing is very important. If it is dry ground, the shaft and the tungsten steel bushing will be scrapped quickly. It is recommended to scrape the inner hole wall of the tungsten steel bushing during installation, which can leave many small pits and enhance lubrication. Different models of tungsten steel bushings are selected according to different industrial and mining conditions.
The main conditions that affect the life of tungsten steel bushings are: pressure, speed, product of pressure and speed, lubrication state, and load properties. The requirements for rotary motion and axial sliding are different, and the performance of lubricating oil is also very different. The speed and pressure basically determine the life of the tungsten steel bushing.