Correlation of bearing vibration and noise, this time analysis must allow you to learn

Bearing noise is motor manufacturing, testing and often use process problems, just talk about the problem of bearing is a very unscientific practice, should be in accordance with the principle of correlation, from the Angle of coordination to analyze and solve problems.     Rolling bearing itself usually does not produce noise. Referred to as 'bearing noise', is actually around the bearing structure directly or indirectly from the sound of the vibration. So the noise problem usually should be involved in the vibration problems of the application of the bearing to consider and solve. Vibration and noise is often accompanied by a pair of things, the source of noise can be summed up in vibration, thus solving the problem of noise should be reduce the vibration.     Basic when it comes down to load rolling element bearing vibration quantity change, matching accuracy, local damage and pollution factors such as the excitation, should through the bearing of the rational allocation of as much as possible to reduce the impact of these factors. The following Ms. Joining some applications of the accumulation of experience to share with everyone to do a, as a reference in the design of bearing system.     Load rolling element quantity change caused by motivating factors & emsp;   The effect on the bearing radial load, the load of rolling element in the process of turning number will change slightly, so lead to bearing has a slight displacement along the direction of the load, thus vibrations is unavoidable, but can pass on all roller axial pre-tightening force to reduce vibration ( Do not apply to the cylindrical roller bearing) 。     The precision of matching parts factors & emsp;   If the bearing ring and bearing seat or shaft is interference fit between bearing ring may follow the shape of the connecting parts and deformation. If the difference in shape between the, in operation may cause vibration. Therefore, journal and a hole must be processed to the required standard of tolerance.     Local damage factors & emsp;       If due to improper handling or installation error, bearing may cause local damage on the raceway and rolling body. When the damaged bearing parts with other parts have a rolling contact, can produce special bearing vibration frequency. By analyzing the vibration frequency, can be sure that a damaged bearing parts, such as inner ring and outer ring or roller, etc.     Pollution factors & emsp;   Bearing under the condition of pollution, it is easy to impurities and particle enters. When these pollution particles were rolling roller, vibration is produced. Impurities in different composition, the number and size of particles caused by vibration level are different, the frequency is no fixed pattern. But the same is likely to result in a disturbing noise.     Bearing's influence on the vibration characteristics & emsp;   In many applications, the bearing stiffness and the surrounding structure rigidity are roughly the same. Thus by selecting appropriate bearing ( Including pre-tightening and clearance) And the way of configuration to reduce the vibration of the equipment. Vibration reduction methods are: & emsp;   Low reducing vibrations in the application of excitation force & emsp;   's components increase caused by vibration damping to reduce the resonance & emsp;   When changing the structure of the rigid to change critical frequency.     Found from the actual experience, solve the problem of bearing system, in fact is the activity of bearing manufacturer and use manufacturer linkage, in terms of the after repeated and improved in order to better solve the problem was, and therefore solve the problems in the bearing system, we advocate cooperation and win-win situation.     【 Warm prompt. 【 The bearing network] Some information from the Internet, and strive to secure timely, accurate, aims to deliver more information, does not represent our views to its approval or responsibility for their authenticity. If this net reprint information involves the issues such as copyright, please contact with this net. Tel: 0571 - 81630205. Tags: production and processing