Lubrication Difference Analysis Between Ordinary Bearings and High-speed Bearings

Lubrication Difference Analysis Between Ordinary Bearings and High-speed Bearings

Ⅰ. Ordinary bearing lubrication

1. The purpose of ordinary bearing lubrication

(1) Prolong 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 thickness of the lubricating oil film 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 make up the bearing, metal contact is prevented and friction and wear are reduced.

2. Ordinary lubrication method

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.

Ⅱ. High-speed bearing lubrication

High speed bearing lubrication method:

(1) Under the ring lubrication method

The under-ring lubrication method uses the centrifugal inertia to directly spray the oil to the surface of the raceway through many radial holes on the inner ring, and a part of the oil flows axially along the inner ring to achieve the purpose of cooling the inner ring. The oil entering the raceway is divided into two channels on the left and right to flow 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 for high-speed bearings is much less than that of oil injection lubrication, and the power loss caused by the dynamic stirring of the oil is also small, and the heat generation of the bearing has also been greatly improved, and even the temperature of the inner ring may be lower than that of the outer ring to reduce the failure rate of the bearing.

(2) Oil-air 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 of oil-air lubrication and its characteristics The principle of oil-air lubrication is to use a quantitative piston distributor to discharge a very small amount of oil (such as 0.01ml) intermittently at a better cycle, and the discharged oil forms a continuous flow before reaching the bearing. Along with the air into the bearing.

The consequence of a motor without bearings is that it does not work at all. Because the shaft can move in any direction, the shaft can only rotate when the motor is working. It is theoretically impossible to realize the role of communication. Not only that, but the bearing will also affect the transmission. In order to reduce this effect, the bearings of the high-speed shaft must be well lubricated. Some bearings are already lubricated, called pre-lubricated bearings. Most bearings must be lubricated. When driving at high speed, friction not only increases energy consumption, but what is more frightening is that the bearing is easily damaged. We, Rundong Petroleum Machinery, provide a complete set of bearings and produce various bearings based on the principle of being market-oriented. Welcome to order our products online!