slewing ring bearings The failure forms of rolling bearings

(a) fatigue spalling

Inside and outside the rolling bearing raceway and rolling body alternately to enter and exit the bearing area, these parts due to long time under alternating load, first from the contact surface following the largest alternating shear stress fatigue crack, and then high precision bearings‍ extend to the contacting surface produced punctate stripping in the surface layer, and gradually developed into large particles, called fatigue spalling.

(two) wear

The raceway and rolling body relative motion and dust caused by foreign body surface wear, lubrication will aggravate the wear, the slewing ring bearings‍ clearance increases, the surface roughness increased, decreased the SUNTHAI bearing rotation Taper roller bearings‍ accuracy, and thus reduce the motion accuracy of the machine, showed increasing vibration and noise.

(three).

Because the bearing inner raceway and rolling body contact on the surface of the micro convex or hard particles make contact surface uneven stress, in poor lubrication, high speed and heavy load conditions, due to the local friction heat caused by the contact surface of local deformation and friction welding, serious when may partially melted metal surface, the Flange Slewing Bearing‍ contact surface on the local friction force the welding point tear from the base.

(four) fracture

When the bearing load, vibration is too large, the defect position of inner and outer rings in the repeated impact roller, defects gradually expanded and fracture.

(five) corrosion

Water or acid, alkaline substances directly can cause invasive SUNTHAI bearing self aligning ball bearing‍ corrosion. When the SUNTHAI bearing internal shaft current through it, causing spark at the contact point raceway and rolling body to cause electrical erosion, formed on the surface of the uneven washboard.