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Why does NSK bearings announce noise during operation?
Source: Bearing network time: 2014-07-26
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Regarding the use of NSK bearings; the noise is often the same as usual. Even the low-noise NSK bearings in imported bearings have the same condition.
1. The rolling sound of NSK bearing and its control method The rolling track sound is a kind of slippery movement that is announced when the NSK bearing is working; its rolling body is rolled on the raceway surface; it is unique to all rolling bearings. The basic sound. The usual imported bearing sound is the rolling sound plus other movements. The ball bearing's rolling sound is irregular; the frequency is above 1000Hz; its main frequency does not change with the speed; but its total sound pressure level The speed of the acceleration is added. The NSK bearing with large rolling sound; the sound pressure level of the raceway sound is reduced with the addition of viscosity, and the NSK bearing with small rolling sound; the sound pressure level is increased to about 20mm2/ When it is above s; from the reduction to the increase. The rigidity of the NSK bearing seat in Japan is greater; the lower the total sound pressure level of the raceway sound. For example, the radial clearance is too long. The method of controlling the sound of the raceway is to select a low-noise bearing, that is, a NSK bearing with a small waviness; carefully select the operating conditions. The raceway sound often affects the entire machine. Noise; reducing the sound of the raceway can reduce the noise of the entire machine.
2, the impact sound of the rolling body and its control method Larger type of ball bearing or cylindrical roller bearing under low-speed working under pure radial load; because the centrifugal force of the rolling body is a bit apologetic to the 诜 汕 汕 汕 汕 汕鞅3 芑蚬龅 Indigo 3. 鲈肷. But as the speed of rotation progresses; this movement will disappear. The control methods for the roll impact sound are: properly reduce the radial clearance; use reasonable layout and the information is harmonious. NSK bearing for the sex cage.
3, NSK imported bearing rolling sound and its control method rolling sound is a cylindrical metal roller bearing in all occasions may occur sharp metal conflict sound; most of the attack in the grease type of the larger type of NSK bearing; It is easier to attack in smooth fat with degraded oil function; it does not occur when the oil is smooth. In addition, it is easy to attack in winter; when it receives pure radial load; it is easy to attack when the radial clearance is large; Different; it is easy to attack in a certain range of speed; it will be intermittent and intermittent. The special processing method of the outer ring raceway can avoid the appearance of rolling sound; if necessary, this NSK bearing can be used; Or properly reduce the radial clearance of the imported bearings; use the excellent smooth grease and improve the rigidity of the NSK bearing-like parts.
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