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How to analyze the cause of automobile bearing failure?

Blog 3年前 (2021-08-18) 370 Views
  Automotive bearings30 reasons for failure:The cause of automobile bearing failure?
How to analyze the cause of automobile bearing failure?
There are impurities in the oil.

Insufficient lubrication

(The oil level is too low, improper storage, oil leakage or oil leakage in the seal);

Bearing clearance is too small or too large

(Problems of production equipment);

The bearing is corroded by water, acid or paint.

Bearing seat hole flattened

(The roundness of the seat hole is not good, or the seat hole is not straight);

The bearing seat base is not flat

(Causing deformation of the seat hole and even cracks in the bearing seat);

Impurities in the bearing seat hole

(Remaining debris, dust, etc.);

Seal ring eccentric

(Friction occurs in adjacent parts);

Bearing with additional load

(The bearing is tightened axially or there are two fixed-end bearings on one shaft);

Loose fit between bearing and shaft

(The shaft diameter is too small or the fastening sleeve is not tightened);

(The tightening sleeve is too tight);

Bearing noise

(Caused by the end of the drum or the steel ball slipping);

Shaft thermal elongation is too large

(Bearings bear additional static and uncertain axial loads);

The shoulders are too big.

(Friction occurs when encountering bearing seals);

The shoulder of the seat hole is too large

(TwistCrankshaftBearing seal);

(Friction with shaft);

The lock washer has a curved tooth profile

(Friction occurs when encountering bearings);

The position of the slinger is inappropriate.

(Contact the flange cover and cause friction);

Pressure pits on steel balls or rollers

(Due to bearing hammering during installation);

Bearing noise

(Interference from external vibration sources);

(usespray gunHeating to disassemble the bearing);

(Causes bearing temperature to be too high or noise);

Small seat hole diameter

(Causing the bearing temperature to be too high);

The bore of the bearing seat is too large, and the actual fit is too loose

(Bearing temperature is too high-outer ring slips);

Bearing housing hole enlargement

(The non-ferrous metal bearing seat hole is elongated or enlarged due to thermal expansion);

Cage fracture;

Corrosion of bearing raceway;

Wear of steel balls and raceways

Failed loop