Miniature bearing cage causes of noise

Keeping aircraft noise is a bearing on the cage in the process of free vibration and maintain aircraft collided with roller or ring blow by. Normally this kind of noise is due to the rolling element and cage, cage and guide the sliding friction between surfaces. Cage and collisions and the sound of the roller is cyclical. When using guide roller cage, the instability of the movement is more serious. Stamping of deep groove ball bearing cage is thinner, the radial and axial plane bending stiffness is low, the overall stability and bearing caused by bending deformation occurs when high speed rotating self-excited vibration, causing 'hum' keeping aircraft noise characteristics are as follows (1) stamping and plastic cage can produce; (2) whether it is a thin oil or grease will appear; (3) most likely to occur when outer ring under bending moment, (4) it's easy to have a large radial clearance. Measures to prevent cage noise is as follows: (1) to make maintains a stable orbit, should try to adopt ring boot methods and pay attention to the guide surface should be smooth. To operate at a high speed under the condition of tapered roller bearing structure to improve, channeling roller stamping L keep frame to ring guard guide Z type cage; (2) bearing high speed rotates, pocket hole clearance ( Cage placed ball bearing hole and the gap between the ball) Large bearing bracket will be its vibration amplitude is greater than small cage pocket hole clearance vibration amplitude, so the pocket hole clearance value is particularly important; (3) pay attention to minimize radial clearance; (4) try to improve the cage manufacture precision and surface quality of the cage, will be conducive to reduce rolling element and cage collision and friction, so as to reduce the noise; (5) the active adoption of advanced cleaning technology for spare parts and set of the finished product after effective and thorough cleaning, high bearing cleanliness. ( 4) The noise of the bearing ring rolling bearing noise is basically caused by the vibration of the bearing ring. Structure, the stiffness of the bearing ring, manufacture fine degrees, installation conditions and usage factor of influence on its vibration. If the radial corrugated roll bearing inner ring road is relatively large, when the ball bearing inner ring rotation to here, the ball will are in the wave peak, will not only cause the radial vibration of outer ring, but also will cause the outer ring of the axial vibration.