Date: 2013-08-20

Nature of stainless steel spherical bearings noise diagnosis technology

Stainless steel spherical bearing Raceway Raceway is sound and its control method when the bearing operation, rolling it across the Raceway surface and make a slippery continuum of sound, is the basic sound of all rolling bearings will be unique. General bearing Raceway acoustic sound that is combined with other sounds. Ball bearing roller is irregular, above 1000Hz frequency, frequency of rate changes with the speed, but the overall sound pressure level increases with accelerating speed of.
Stainless steel bearings with spherical bearing Raceway, its acoustic sound pressure level rolling road with the increase and decrease of viscosity and small bearing Raceway, their sound pressure level in the viscosity increases to about 20mm2/s and above, from reduction to increase. Greater the rigid housings, roller lower the overall sound pressure level of sound. Radial clearance is too small, and Raceway total sound pressure level and frequency will increase sharply as the reduction in radial internal clearance. Method of controlling the rolling sound: Optional low noise bearings bearing corrugated-small, carefully choose the conditions of use. Acoustic noise affecting the whole machinery of the Raceway, Raceway reduction can reduce the noise of machinery as a whole.
Analysis of vibration signal of the main time-domain analysis and frequency-domain analysis in two ways. Time-domain analysis of increase range and time difference field in two forms, between time domain and frequency domain transform realized through technology.
But if said stainless steel spherical bearings when a defect, you can no longer continue to use, it should be immediately replaced with new non-standard bearings. As follows:
(A) the bearing inner ring, outer ring, rolling elements, cages of any cracks or gaps in the a;
(B) on the bearing rings and rolling elements in any one fault;
(C) the bearing Raceway surface, rib, rolling a remarkable card injury;
(D) bearing retainer wear significantly, or rivets marked relaxation;
(E) on the bearing Raceway surface, rolling rust, hurts;
(F) on the bearing Raceway surface, rolling with serious creasing and mark;
(G) the diameter of the inner ring of the bearing surface or outer ring outside diameter surface has obvious creep;
(H) due to thermal discoloration caused by obvious.
So, when stainless steel spherical bearings for the above cases, please do not continue to use, it should be immediately replaced with new non-standard bearings. Avoid unnecessary accidents.

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