The difference between drawn cup needle roller bearing and h
Source:未知Author:hyzc Addtime:2022-09-15 Click:
A: Ordinary bearing lubrication:
The purpose of ordinary bearing lubrication:
1. Extend fatigue life.
The rolling fatigue life of the bearing is extended when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the lubricating oil film thickness is not good, it will be shortened.
2. Reduce friction and wear.
In the mutual contact parts of the rings, rolling elements and cages that constitute the bearing, metal contact is prevented, and friction and wear are reduced.
Bearing lubrication methods are divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, it is necessary to select a lubrication method suitable for the conditions of use and the purpose of use. If only lubrication is considered, the lubricity of oil lubrication is dominant.
B: high-speed bearing lubrication:
High-speed bearing lubrication method:
1. Under the ring lubrication method
The under-ring lubrication method uses centrifugal inertia to directly spray the oil to the raceway surface through many radial holes in the inner ring, and part of the oil flows axially under the inner ring to achieve the purpose of cooling the inner ring. The oil entering the raceway is divided into left and right channels and flows out, and by the way, the wear debris falling from the cage and other parts is washed away.
The oil consumption of this lubrication method is much less than that of oil injection lubrication, the power loss caused by the dynamic stirring of the oil is also less, the heating of the bearing is also greatly improved, and even the temperature of the inner ring may be lower than that of the outer ring. Bearing failure rate.
2. Oil and gas lubrication method
The advantage of the oil-air lubrication method is that the advantages of this method are more significant for bearings with more internal sliding without changing the bearing structure.
The principle and characteristics of oil-air lubrication The principle of oil-air lubrication is to use a quantitative piston distributor to discharge a very small amount of oil (for example, 0.01m1) intermittently with a good cycle, and the discharged oil forms a continuous flow before reaching the bearing. along with the air into the bearing.