The lubrication of the bearing can make the bearing operate normally, avoid the direct contact between the raceway and the rolling element surface, reduce the friction and wear inside the bearing, prolong the service life of the bearing and improve the performance of the bearing, which will prevent and prevent the rust and corrosion caused by foreign matters entering the bearing. This paper introduces 10 kinds of lubrication methods commonly used in bearings.
1、 Manual lubrication
This is the most original method. If the bearing lubrication is insufficient, please use the oiler to supply oil. However, this method is difficult to maintain a certain amount of oil. Due to the risk of forgetting fuel, it is usually only used for light load, low-speed or intermittent movement. In order to achieve good operation, a dust cover or ball valve is installed on the fuel hole. In addition, felt, cotton, wool, etc. are used as filtering devices.
2、 Drop some oil
It is usually used for light and medium load bearings with peripheral speed less than 4-5m/s, and almost constant amount of lubricant is injected from the container through holes, needles, valves, etc. Supply. When using the oil cup, the amount of oil dripping will vary greatly according to the viscosity of the lubricating oil, the clearance of the bearing and the position of the lubrication hole.
3、 Oil ring shape
By rotating the ring suspended on the shaft, the lubricating oil in the oil pool is brought to the bearing (only for the horizontal shaft lubrication method), and the shaft diameter is increased to a medium speed of more than 50 mm. fit. If the aspect ratio of the bearing is less than 2, only one oil ring can be used; Otherwise, two oil rings are required.
4、 Shape of oil
According to the capillary effect and siphon effect of the oil rope, the lubricating oil in the oil cup is introduced into the bearing. In addition to oil, it is mainly used for light and medium-sized bearings with peripheral speed less than 4-5m/s, and the rope can act as a filter in the whole process.
5、 Oil cushion packaging
Use the capillarity of the oil pad to apply the lubricant in the oil pool to the surface of the shaft diameter. This method can keep the friction surface clean, but it can also block the pores and prevent insufficient oil supply. The oil supply of oil pad lubrication is usually only 1/20 of that of oil lubrication.
6、 Oil groove shape
This lubrication method is used to immerse a part of the bearing into the lubricating oil. It is usually used for vertical thrust bearings rather than horizontal radial bearings
7、 Splash lubrication
Splash lubricating oil provides bearings for the bearings according to the sliding of rotating parts in the bearing housing. Suitable for high-speed bearings.
8、 Height, spray lubrication
The method of lubricating lubricant and spraying it on the friction surface is suitable for high-speed bearings.
9、 Pressure oil lubrication
The oil is supplied to the bearing through the pressure of the lubricating pump, and the lubricating oil from the bearing is collected in the oil pool and recycled. This is the most stable lubrication method, Solid and important plain bearings.
10、 Circulating oil lubrication
Use the oil pump to transfer the filtered oil to the bearing parts. After using the bearing, filter and cool the lubricating oil. This method is applicable to high-speed bearing parts, because circulating oil will take away a certain amount of heat and cool the bearing. Xi. Use spray lubrication
The oil pump injects high-pressure oil from the nozzle into the bearing. The oil injected into the bearing flows into the oil tank from the other end of the bearing. When the bearing rotates at high speed, the rolling element and cage also rotate the surrounding air at a relatively high speed, so it is difficult to deliver lubricant to the bearing through conventional lubrication methods. In the bearing, the nozzle must be located between the inner race and the center of the cage.
