subject: How To Reduce The Fatigue Wear Of The Crusher [print this page] How to reduce or eliminate the fatigue wear of iron ore jaw crusher? The main countermeasure is to control the produce and the broadening of the fissure. The main countermeasures are as follows.
1. The materials
The nonmetallic inclusion in the steel will cause the stress concentration. The edge of these inclusions is most likely to form the cracks, thereby reducing the contact fatigue life of the material. The organization state and the internal defects of the material will also have an important effect on the wear of the equipment. Generally speaking, the fine and uniform grain is conducive to improve the service life of the equipment.
2. The hardness
Within a certain range, the hardness increases the contact fatigue resistance increases. For example, the bearing steel surface hardness 62HRC about its anti-fatigue wears. Transmission gear tooth surface, the hardness in the range of 58-62HRC, when the tooth surface by the impact load, the hardness should take 30-50HRC. In addition, the two rolling contact surface hardness matching is also very important. For example, the rolling bearing, the hardness of the raceway and rolling elements are similar, or the rolling element 10% higher than the hardness of the raceway is appropriate.
3. The liner surface roughness
Appropriate to reduce the backing surface roughness is an effective way to improve the anti-fatigue wear, for example, the Rolling table back to the roughness decreased from 0.40pm to 0.20pm, life can be increased 2-3 times; reduced to 0.05pm the following, the increase in life have little effect. Require the backing liner surface roughness correlated with the liner surface to withstand the contact stress related, are often exposed to stress fire, or lining the surface of high hardness, surface roughness is low.
In addition, the liner surface, the stress state, with the level of accuracy, the nature of the lubricating oil has impact on the speed of fatigue wear. Typically, lining the surface stress is too large, the gap is too small or too large, and the lubricating oil in use will exacerbate the fatigue wear.
