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Spherical roller bearings running noise causes?
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| Time：2016.11.04 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Spherical roller bearings according to the roller cross-sectional shape is divided into symmetrical spherical roller and asymmetric spherical roller two different structures, asymmetric spherical roller bearing is an early product, mainly for the host maintenance services, the new design of the host When it is rarely used symmetric spherical roller bearings, the internal structure of a comprehensive improvement of design and parameter optimization, and early production of spherical roller bearings compared to be able to withstand greater axial load, the bearing operating temperature Low, it can adapt to the requirements of higher speed, according to whether the inner ring and the use of the cage can be divided into C-and CA-type two, C-type bearing is characterized by no inner wall and the use of steel Stamping cage, CA-type characteristics of Trane bearing both sides of the inner ring and the use of the car body retaining cage.
In order to improve the lubrication of bearings, Longma bearing to provide users with the outer ring ring groove and three oil hole of the spherical roller bearings to bearing the post-code / W33 said. According to the users requirements can also be supplied with the inner ring of the oil hole of the self-aligning roller bearings, in order to facilitate customer handling and replacement of bearings, but also provide bore with taper of the self-aligning roller bearings, cone taper 1:12 , To post-code for the K said that in order to meet the requirements of special users can also provide the bore taper 1:30 of the bearings, the post-code-named K30. Long-aligning roller bearings have a good aligning performance, but will produce some noise in the operation, then in the end what is the reason for the self-aligning roller in operation to produce noise?
Causes noise
(1) Spherical roller bearing raceway sound and control method Roller sound When the bearing is running, the rolling body rolling in the raceway surface of the rolling issue of continuous sound, all rolling bearings are unique to the basic sound. The general bearing sound is the roller sound plus other sounds. Ball bearing raceway sound is irregular, the frequency of 1000Hz or more, its main frequency does not change with the speed, but the total sound pressure level increases with the speed of acceleration. Spherical roller bearings of large sound, the sound pressure level of the raceway with the increase of the viscosity decreases; and small roller bearings, the sound pressure level increases in viscosity to about 20mm2 / s or more, From reduced to increased. The greater the rigidity of the bearing, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level of the raceway sound and the main frequency will increase sharply as the radial clearance decreases. Control of the raceway sound methods are: low-noise self-aligning roller bearings that waviness is very small bearings, carefully select the conditions of use. Track noise often affect the entire mechanical noise, reduce the noise can reduce the entire machinery of the noise.
(2) the impact of the rolling sound and its control methods larger ball bearings or cylindrical roller bearings in the pure radial load operation at low speed, the smaller the centrifugal force of the rolling body, in the non-load area of the rolling body will Impact cage or raceway to make noise. But with the speed increase, the sound will disappear. The impact of the rolling body control methods are: appropriate to reduce the radial clearance, the use of reasonable structure and the flexibility of the material has a cage bearing.
(3) Spherical Roller Bearing Rolling sound and control methods Rolling sound is a cylindrical roller bearings in all occasions may occur in the ear-piercing metal friction sound, most of the grease lubrication in the larger model bearings, and the It is more likely to occur in greases where the base oil is deteriorated, and hardly occurs in oil lubrication. In addition, more prone to occur in the winter, when subjected to pure radial load, the radial clearance of large occasions prone to, and with the size of the model, in a particular speed range prone to both the continuous Will appear intermittently. The outer ring raceway to take a special method of processing can prevent the emergence of rolling sound, the need to choose this self-aligning roller bearings, or to reduce the spherical roller bearing radial clearance, the use of excellent performance grease and improve And aligning roller bearings match the rigidity of parts.
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