Analysis: Characteristics of NSK bearing raceway noise

The source of the rolling sound is caused by the natural vibration of the ferrule after the load. Due to the elastic contact of the ferrule and the rolling body, a nonlinear vibration system is formed. When the lubrication or machining accuracy is not high, the natural vibration associated with this elastic characteristic is excited, and when it is transmitted to the air, it becomes noise. As we all know, even if the NSK bearing parts are processed by the highest modern manufacturing technology, there will always be a small geometric error in the working surface, so that small fluctuations between the raceway and the rolling body will stimulate the natural vibration of the vibration system.

Although the raceway noise of the NSK bearing is unavoidable, it is possible to use high-precision machining of the working surface of the part, the correct selection of NSK bearings and the precise use of NSK bearings for noise reduction and vibration reduction.

The rolling sound is due to the rolling of the rolling elements in the raceway when the NSK bearing rotates to excite a smooth and continuous noise, which only attracts attention when its sound pressure level or tone is extremely large. In fact, the sound energy excited by the raceway sound is limited. For example, under normal conditions, the quality of the 6203NSK bearing raceway is 25~27dB. This type of noise is the most typical of single row deep groove ball bearings that can withstand radial loads. It has the following characteristics:

a. Noise and vibration are random;

b. The vibration frequency is above 1 kHz;

c. Regardless of the change in the rotational speed, the main frequency of the noise is almost constant and the sound pressure level increases as the rotational speed increases;

d. When the radial clearance increases, the sound pressure level increases sharply;

e. NSK bearing housing rigidity increases, the lower the total sound pressure level, even if the speed increases, its total sound pressure level does not increase much;

f. The higher the viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication, the viscosity and shape of the soap fiber can affect the noise value.

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IKO bearing maintenance

1. Maintenance, inspection, and abnormal handling of IKO bearings In order to maintain the original performance of IKO bearings in good condition for as long as possible, maintenance, inspection, and accident prevention are required to ensure the reliability of operation and improve productivity. Economic. Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The contents include monitoring of operating conditions, replenishment or replacement of lubricants, and inspections for periodic disassembly.

As a maintenance item during operation, there are rotary sounds, vibration, temperature, and state of lubricant of IKO bearings.

2, IKO bearing damage and countermeasures Generally, if the IKO bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidents that are prematurely damaged and cannot be used. This early damage, as opposed to fatigue life, limits the quality of what is known as a fault or accident. Many of them are caused by inadvertent installation, use, and lubrication, and foreign objects intruding from the outside are insufficiently studied for the thermal effects of the shaft and the outer casing.

Regarding the damage state of the IKO bearing, for example, the jam of the ferrule rim of the roller IKO bearing can be considered as a cause of insufficient lubricant, unsuitability, defects in the oil supply structure, foreign matter intrusion, IKO bearing installation error, shaft If the deflection is too large, there will be coincidences of these reasons.

Therefore, it is difficult to know the true cause of the damage by investigating only IKO bearing damage. However, if you know the IKO bearing's use of machinery, the conditions of use, the structure around the IKO bearing, and understand the situation before and after the accident, combined with the damage state of IKO bearings and several reasons, it can prevent similar accidents from happening again.

For more information and purchase please visit: https://www.supplyforever.com

IKO bearing maintenance

1. Maintenance, inspection, and abnormal handling of IKO bearings In order to maintain the original performance of IKO bearings in good condition for as long as possible, maintenance, inspection, and accident prevention are required to ensure the reliability of operation and improve productivity. Economic. Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The contents include monitoring of operating conditions, replenishment or replacement of lubricants, and inspections for periodic disassembly.

As a maintenance item during operation, there are rotary sounds, vibration, temperature, and state of lubricant of IKO bearings.

2, IKO bearing damage and countermeasures Generally, if the IKO bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidents that are prematurely damaged and cannot be used. This early damage, as opposed to fatigue life, limits the quality of what is known as a fault or accident. Many of them are caused by inadvertent installation, use, and lubrication, and foreign objects intruding from the outside are insufficiently studied for the thermal effects of the shaft and the outer casing.

Regarding the damage state of the IKO bearing, for example, the jam of the ferrule rim of the roller IKO bearing can be considered as a cause of insufficient lubricant, unsuitability, defects in the oil supply structure, foreign matter intrusion, IKO bearing installation error, shaft If the deflection is too large, there will be coincidences of these reasons.

Therefore, it is difficult to know the true cause of the damage by investigating only IKO bearing damage. However, if you know the IKO bearing's use of machinery, the conditions of use, the structure around the IKO bearing, and understand the situation before and after the accident, combined with the damage state of IKO bearings and several reasons, it can prevent similar accidents from happening again.

For more information and purchase please visit: https://www.supplyforever.com