This is the most primitive method. When the lubricating oil of the bearing is insufficient, use a lubricator to supply oil. However, this method is difficult to maintain a certain amount of oil, and there is a greater risk of forgetting to refuel due to negligence. It is usually only used in light-load, low-speed or intermittent motion occasions. It is best to set a dust cover or ball valve on the refueling hole when operating. And use felt, cotton, wool, etc. as filter device.

It is usually used for light-load and medium-load bearings with a peripheral speed of less than 4-5m/s. The supply from the container through holes, needles, valves, etc. is roughly Quantitative lubricating oil, the most classic is the drip oil cup, the amount of dripping oil varies significantly with the viscosity of the lubricating oil, bearing clearance and the position of the oil supply hole.

The lubricating oil of the oil pool is brought into the bearing by the ring that is hung on the shaft and can rotate (only for the lubrication method of the horizontal shaft) , suitable for medium-speed and high-speed bearings with a shaft diameter greater than 50mm. The oil ring is preferably seamless. When the bearing width-diameter ratio is less than 2, only one oil ring can be used, otherwise two oil rings are required.

Relying on the capillary and siphon action of the oil rope to lead the lubricating oil in the oil cup to the bearing, it is mainly used for the peripheral speed less than 4～5m/s The light and medium-load bearings are suitable for use, and the oil rope can play a filtering role in the whole process.

Use the capillary action of the oil pad to apply the lubricating oil in the oil pool to the surface of the shaft diameter. This method can keep the friction surface clean, but Dust can also clog the capillaries and cause insufficient oil supply. The oil supply of oil pad lubrication is usually only 1/20 of that of oil lubrication.

This lubrication method is to immerse a part of the bearing in the lubricating oil, which is often used for the thrust bearing of the vertical shaft, not suitable for the radial direction of the horizontal shaft. bearing.

The lubricating oil splashed by the slap of the rotating parts in the oil tank is supplied to the bearing, which is suitable for the bearing of higher speed.

The lubrication method of spraying the lubricating oil on the friction surface after atomizing it is suitable for high-speed bearings.

The pressure of the lubricating pump supplies oil to the bearing, and the lubricating oil flowing from the bearing is recovered to the oil pool for recycling, which is the most oil supply and The most stable lubrication method for high-speed, heavy-duty, important plain bearings.

Use the oil pump to transport the filtered oil to the bearing parts, and the lubricating oil after passing through the bearing is filtered and cooled before use. Because the circulating oil can take away a certain amount of heat and cool the bearing, this method is suitable for bearing parts with high rotation speed.

Use an oil pump to inject high-pressure oil into the bearing through the 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 the general lubrication method. At this time, the lubricating oil must be sprayed by high-pressure injection Into the bearing, the position of the nozzle should be placed between the inner ring and the center of the cage.

Bearing lubrication is an ongoing task, and the oil change interval is based on the bearing's operating conditions and oil volume. Under normal circumstances, when the operating temperature is below 50°C and in a good environment with less dust, replace it once a year, and when the oil temperature reaches 100°C, replace it once in 3 months or less.