Spindle bearing Raceway sound when in operation, its rolling rolling on the pavement and making a continuous noise generally occurs is all spindle bearings the individual sounds. SKF bearings generally are rolling road sound with other sounds. Ball bearing roller is irregular, frequencies in the above 1000Hz, the frequency of rate changes with the speed, but the total sound pressure level increases with the acceleration of the speed of. Roller bearings, its acoustic sound pressure level of the Raceway with the increase and decrease of viscosity and roller bearings of the smaller, its sound pressure level in the viscosity increases to about 20mm2/s above, from reduction to increase. Greater the rigidity of bearing, roller lower the total sound pressure level sound. Radial clearance is too small, Raceway total sound pressure level and frequency of the sound will surge as the reduction in radial internal clearance. Control method of Raceway: the use of low noise bearing of spindle bearing the waviness is small, carefully selected using criteria. Acoustic noise affecting the entire machinery of the Raceway, Raceway reduction can reduce the noise of the machinery as a whole.
Impact and control method of rolling ball bearings or cylindrical roller bearings of the larger models in under purely radial load at low speed operation, smaller due to the centrifugal force of the rolling, load-free area in the roll cage of rolling elements will shocks or road noise. But as the speed increases, this noise will disappear. On the rolling control method of pulse sound: appropriate reduction of radial clearance, reasonable structure and material compliance in spindle bearings with cage.
Spindle bearings spinning, due to constant wear and failure of frictional resistance of SKF bearing. Resistance by impeding the rotation of the spindle bearing rolling friction, lubricant for sliding friction and friction of three components. When the rolling elements in the bearing Raceway when rolling on rolling friction; cage roller centred cage on the flange in the boot, and roller bearings on the roller end faces and sliding friction rings occur on the sidewall; lubricants friction by internal friction and lubrication of lubricant in contact consists of mixing and extrusion. Impedance resistance of bearing movement is the sum of the above three types of friction. The purpose of lubrication by grease and lubrication to avoid rolling road, direct contact between the rolling elements, cages of metal, reducing the friction heat ′ friction to a minimum, thus reducing wear, prevents corrosion and extend its service life.
About bearing 80% use grease to lubricate. There are many types of SKF bearings are bearings factory grease evacuation users. Someone referred to grease the bearing inner ring, outer ring, rolling elements and cage of four parts of the fifth large parts. Note importance of lubricating grease for bearings.