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11 Ways of Bearing Lubrication

wallpapers Products 2020-10-28
The lubrication of the bearing is to enable the bearing to operate normally, avoid direct contact between the raceway and the surface of the rolling element, reduce the friction and wear inside the bearing, extend the service life of the bearing, enhance the performance of the bearing, and prevent foreign matter from invading the bearing Internal causes rust and corrosion. This article introduces 11 commonly used lubrication methods for bearings, and hope to help your design.
1. Manual lubrication
This is the most primitive method. When the lubricating oil of the bearing is insufficient, use an oiler to supply oil. However, this method is difficult to maintain a certain amount of oil. It is more dangerous to forget to refuel due to negligence. It is usually only used in light-load, low-speed or intermittent sports. When it is best to operate, install a dust cap or ball valve on the refueling hole. And use felt, cotton, wool, etc. as filtering device.SKF Bearings
2. Drop point lubrication
Usually used for light-load and medium-load bearings with a peripheral speed of less than 4~5m/s. A roughly fixed amount of lubricating oil is supplied from the container through holes, needles, valves, etc., the most classic is the drip cup, the amount of dripping depends on the lubrication The oil viscosity, bearing clearance and oil supply hole position vary significantly.
3. Oil ring lubrication
The lubricating oil from the oil sump can be brought to the bearing by the ring that is hung on the shaft and can rotate (only for the lubrication method of the horizontal shaft). It is suitable for medium-speed and high-speed bearings with a shaft diameter greater than 50mm. The oil ring is best Seamless, when the bearing width to diameter ratio is less than 2, only one oil ring can be used, otherwise two oil rings are required.
4. Oil rope lubrication
Relying on the capillary and siphon action of the wick to guide the lubricating oil in the oil cup to the bearing, it is mainly used for light-load and medium-load bearings with a peripheral speed of less than 4~5m/s. In addition, the wick can filter the whole process. The role of.
5. Oil pad lubrication
Using the capillary action of the oil cushion, the lubricating oil in the oil pool is applied to the surface of the shaft diameter. This method can keep the friction surface clean, but dust will also block the pores and cause insufficient oil supply. The oil supply of oil pad lubrication is usually only 1/20 of oil lubrication.
6. Oil bath lubrication
This kind of lubrication method is to immerse part of the bearing in lubricating oil, which is often used for thrust bearings of vertical shafts, but not for radial bearings of horizontal shafts.
7. Splash lubrication
The lubricating oil splashed by the flapping of the rotating parts in the oil tank is used to supply the bearing, which is suitable for higher speed bearings.
8. Spray lubrication
The lubrication method of spraying the lubricating oil on the friction surface after atomization is suitable for high-speed bearings.
9. pressure lubrication
Relying on the pressure of the lubricating pump to supply oil to the bearing, and recovering the lubricating oil from the bearing to the oil pool for recycling, it is the most stable and stable lubrication method, suitable for high-speed, heavy-duty, and important sliding bearings.
10. Circulating oil lubrication
The oil pump is used to transport the filtered oil to the bearing parts, and the lubricating oil after passing through the bearing is filtered and cooled for use. Because circulating oil can take away a certain amount of heat and cool the bearing, this method is suitable for bearing parts with higher speeds.
11. Jet lubrication
Use an oil pump to inject high-pressure oil into the bearing through a nozzle, and the oil injected into the bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling elements and the cage also make the surrounding air form an airflow at a relatively high rotation speed. It is difficult to send the lubricating oil to the bearing by ordinary lubrication methods. At this time, the lubricating oil must be sprayed by high-pressure injection. In the bearing, the position of the nozzle should be placed between the inner ring and the center of the cage.
Bearing lubrication is a continuous work, and the lubricating oil replacement cycle is based on the bearing's service conditions and the amount of oil. Under normal circumstances, when the operating temperature is below 50°C and in a good environment with less dust, it should be replaced once a year. When the oil temperature reaches 100°C, it should be replaced once in 3 months or less.

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