Precautions for using deep groove ball bearings

1.Mechanical damage

Severe in touch with the surface of the metal stripping and present a large area of messy scratches; usually, bearing mechanical damage refers to the alloy surface of the shaft tile presents different levels of groove marks. Touch surface damage and ablation appearances together constitute the primary reason for bearing mechanical damage is the bearing surface is difficult to constitute oil film or oil film is severely damaged.

2. Bearing cavity corrosion

Surface layer of plastic deformation and cold hardening, sliding bearing in the cylinder pressure impact load under the repeated effect. Part of the loss of deformation capacity, gradually constitute the grain and expanding, and then followed by the fall of abrasive chips, the surface layer of the load constitutes a cavity. Usually shaft tile cavity corrosion, first present crater, then this crater gradually expand and lead to alloy layer interface cracking, crack along the interface of the parallel direction expansion, until the drop stop. The primary reason for cavitation in sliding bearings is because of the oil groove and oil holes and other layout elements of the cross-section of the sudden change led to the oil flow fierce disorder, the oil flow disorder of the vacuum area constitutes bubbles, and then because of the pressure rise, bubble collapse and cavitation occurs. Cave corrosion usually occurs in the bearing of the high load area, such as the crankshaft main bearing on the lower shaft tile.

3. Fatigue pitting corrosion

 Because of the engine overload operation, bearing fatigue pitting corrosion is referred to. So that the bearing operation overheating and bearing clearance is too large, constituting the middle of the bearing fatigue damage, fatigue pitting or perhaps fatigue fall off. Most of this damage is due to overload, bearing clearance is too large, or perhaps the smooth oil is not clean, mixed with foreign matter inside caused by. Therefore, when using should pay attention to avoid bearing overload operation do not work with too low or too high speed; idle to adjust the engine to a stable condition; to ensure that the normal bearing clearance, to avoid the engine speed is too high or too low; check, adjust the operation of the cooling system to ensure that the engine operating temperature is suitable.

4. Bearing alloy corrosion

The chemical impurities (acidic oxides, etc.) in the smooth oil in the table make the bearing alloy oxidation and generate acidic substances, bearing alloy corrosion is usually the area for the smooth oil impure. Resulting in the bearing alloy partly fall off, constitute irregular small cracks or small pits. Bearing alloy corrosion is the primary reason for the improper choice of smooth oil, bearing material corrosion resistance is poor, or perhaps the engine operation rough, the temperature is too high.

5. Bearing burning melt

Constitute part of the high temperature, journal and bearing conflict vice between a small raised metal surface direct touch. Smooth lack, poor cooling, so that the bearing alloy blackened or part of the burning melt. This fault is often caused by the journal and bearing cooperation too tight; lack of smooth oil pressure is also simple to make the bearing burned.