Spindle bearing raceway sound of the running time, the rolling element raceway scroll issue a continuous sound, in general, is a unique sound all electric spindle bearings will occur. The general sound of the bearing raceway sound and other sound. The 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 engine speed to accelerate. Roller Daosheng large bearing raceway sound SPL is reduced with the increase in viscosity; small bearing raceway sound, the level in the viscosity is increased to more than about 20mm2 / s, by reducing transfer is somewhat increased. The greater the rigidity of the bearing raceway sound overall sound pressure level is lower. Such as the radial clearance is too small, the total sound pressure level and the main raceway sound frequency will be increased dramatically with the reduction of the radial clearance. Control raceway sound: the choice of the low-noise electric spindle bearing small bearing waviness, carefully selected conditions of use. The raceways sound often affect the mechanical noise to reduce the raceways sound can reduce the noise of the machinery.

The larger models of the impact sound and its control method of the rolling element ball bearings or cylindrical roller bearings in a purely radial load low speed operation, due to the centrifugal force of the rolling bodies is smaller, in the non-load zone of the rolling bodies will impact holder or raceway noise. As the speed increases, the sound will disappear. The rolling impact sound control methods: appropriate to reduce the radial clearance, reasonable structure material supple cage spindle bearing.

Spindle bearing turning constantly wear and failure due to frictional resistance of the bearing. Hinder the resistance to rotation of the spindle bearing three components of friction by rolling friction, sliding friction and lubricant. When lubrication when the rolling of the bearing raceway, the rolling bodies rolling friction; to maintain the rack guide surface of the rolling body, and holder ribs guide surface and the roller bearing on the roller end surface and a ferrule wall sliding friction occurs; agent friction by the lubricant in contact at internal friction and lubricant mixing and extrusion. Thus the impedance of the resistance of the bearing movement compared to the sum of the friction of the above three. The purpose of lubrication is to be avoided through the grease lubrication method raceways, rolling elements, to maintain direct contact between the holder metal, reducing the frictional heat 'makes the frictional resistance minimized, thereby reducing wear to prevent corrosion, to extend its use life.

Bearing about 80% of the grease to lubricate. There are many types of bearings are greasing bearing plant evacuation user. It was called the grease the bearing inner ring, outer ring, rolling body, keep the fifth largest parts outside the frame four parts. Note the importance of the grease on the bearing purposes.



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