Reduce the NSK thrust ball bearing raceway method analysis of the phenomenon of noise

Removed in order to distinguish the thrust ball bearing can be able to use, check NSK bearings in after washing clean. Check the raceway surface, rolling surface, cooperate with the state, adhere to the wear condition, the increase of the bearing clearance and has nothing to do with dimension precision landing damage, abnormal. Non separation small ball bearing, the extent of support to inner ring with one hand, rotate the outer ring can confirm fluently. Bearing maintenance: bearing cleaning: removing NSK bearings under repair, the appearance of the first recorded bearing, confirm the residual stock of smooth agent, sampling inspection with the smooth agent, after washing bearing. Common use gasoline, kerosene as a cleaning agent. Are thrust ball bearing industry, usage of that type of grease maximum bearing in high speed wire-rod mill, accounts for about 70% points with the amount of fat. Because that kind of grease used fiber soft, white light to filter of lithium do thickener, use of mineral oil for essential oil, very light is difficult to know the foot outside the low-grade NSK bearings reduce the requirement of vibration value. Another benefit is no bad good pumping, whether mechanical fatliquoring, is still the manual besmear butter, tough is concise. And, the lower the price of the grease, can greatly reduce the cost of the bearing. However, due to the use of the mineral oil, make the type of grease is rust and antirust function on the outside of some physical and chemical target to play close button. Such as bearing life can reach 200 hours, linear guide to common problems. Starting and running torque is - 20 ℃ test when there is no problem. The use of grease temperature is commonly - 20 ~ 120 ℃, when was above 150 ℃ high temperature use, will bring about the ultimate oil evaporation too fast, abort the phenomenon such as severe, greatly shorten the thrust ball bearing using life. Bearing removing check, according to the damage of bearing bearing failure and damage reasons. 1. Metal flake bearing raceway surface rolling body and the inner and outer ring raceway surface under the role of the periodic pulse load, resulting in a periodic change of contact stress. When stress cycles after reaching a certain value, the rolling element bearings, their work within or surface produce fatigue spalling. If the load is too large, thrust ball bearing can make this kind of fatigue. In addition, NSK bearings installed is not straight, shaft bending, also can produce roll flaking off. Bearing raceway fatigue spalling can reduce the running accuracy of shaft vibration and noise in the organization. 2. NSK bearings bearing burn burn its heat tint of raceway and rolling body. Burns is usually the cause of insufficient lubrication, lubricating oil quality does not conform to the requirements or metamorphism, and thrust ball bearing assembly too tight. 3. Plastic deformation of NSK bearing raceway and roller contact surface appear uneven pits, bearing produce plastic deformation. The reason is that in large thrust ball bearing under static load or shock loading, local stress exceeds the yield limit of material on the surface of the work, this kind of situation usually happened in the low-speed rotation of the bearing. 4. Bearing race crack cause crack of the bearing race may be bearing fit tight, loose NSK bearing outer ring and inner ring, bearing deformation, inclusive of installation of bearing surface processing etc. 5. Cage fracture reason is the insufficient lubrication, rolling body breakage and seat skew, etc. 6. Retainers metal adhesion on the rolling body possible reason is that roller was stuck in a cage or insufficient lubrication. 7. Seat ring raceway serious wear and tear may be fall into the object in seat, lack of lubricating oil or lubricant brand is not appropriate.