How to solve the problem of INA bearing essential noise

Often affecting the noise of the entire machine, reducing the sound of the raceway can reduce the noise of the entire machine.

Impact sound of rolling element and its control method When the larger type of ball INA bearing or cylindrical roller INA bearing runs at low speed under pure radial load, the rolling element in the non-load area will impact due to the small centrifugal force of the rolling element. Noise is generated by the cage or raceway. But as the speed increases, the sound will disappear. The control methods for the rolling body impact sound are: appropriately reducing the radial clearance, and using an INA bearing with a reasonable structure and a flexible material.

The rolling noise of INA bearing and its control method The rolling sound is the harsh metal friction sound of cylindrical roller INA bearing which can occur in all occasions. Most of them occur in grease-lubricated larger type INA bearing, and the performance in base oil Deteriorated grease is more likely to occur and hardly occurs when oil is lubricated.

In addition, it is more likely to occur in winter. When subjected to pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a certain speed range depending on the size of the INA bearing model. Continuous occurrences will occur intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling noise. If necessary, use this INA bearing, or reduce the radial clearance of the INA bearing, use the excellent grease and improve the matching with the INA bearing. The rigidity of the piece.

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SKF bearings are used correctly and common faults

There are dozens of rolling SKF bearings on the car. SKF bearings are large and small, including almost all common SKF bearing types. The collision and damage of SKF bearings are also common. Since SKF bearings are generally installed inside the mechanism, it is inconvenient to check visually. Only the fault phenomenon can be judged first, and then disassembled and inspected.

The correct use of SKF bearings is a reliable guarantee for reducing SKF bearing failures and extending the life of SKF bearings, including proper installation and proper lubrication. The following describes the requirements for the use of SKF bearings.

1.Removal and assembly of SKF bearings

SKF bearings should be cleaned before installation. When installing, use a special tool to press the auxiliary bearing straight and evenly. Do not hit with a hammer. It is especially forbidden to strike directly on the SKF bearing. When the SKF bearing race and the seat hole are loose, the seat hole should be repaired or the SKF bearing should be replaced. Do not use the method of pitting or padding on the mating surface of the SKF bearing. When the SKF bearing is disassembled, the SKF bearing should be pulled out with a suitable puller. Do not hit the SKF bearing with a chisel or a hammer.

2. Lubrication of SKF bearings

The lubricants commonly used in SKF bearings are both lubricating oil and grease. When the peripheral speed of the shaft is less than 4-5m/s, or the parts of the car that cannot be lubricated with lubricating oil, they are lubricated with grease. The advantage of grease lubrication is that the sealing structure is simple, the grease is not easy to be lost, and the temperature is not affected much. The grease can be used for a long time.

There are two problems to be aware of when using grease. First, select the appropriate grade of grease according to the requirements of the car manual. For example, automotive water pump SKF bearings should not use nano-based grease because of its poor water resistance. Second, the amount of grease added to the SKF bearing should be appropriate. Generally, only 1/2-l/3 of the SKF bearing cavity is filled. Excessive use is not only useless, but also increases the running resistance of the SKF bearing to make it heat up. Special attention should be paid to the SKF bearing of the automobile wheel hub. It is necessary to promote “empty hub lubrication”, that is, only apply an appropriate amount of grease on the SKF bearing. Otherwise, it will not only waste and dissipate heat, but also cause the grease to overflow. May affect braking performance.

Lubricating oil has the advantages of low frictional resistance and heat dissipation, and is mainly used for SKF bearings with high speed and high working temperature. The grade of the lubricating oil should be selected according to the requirements of the automobile manual, and the vehicle maintenance cycle should be replaced in time. After the old oil is released, the mechanism should be cleaned and then new oil should be added. The fuel should be added to the specified marking line or flush with the filling port. (Depending on the specific structure and requirements of the car), it is not allowed to add more.

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