Several damage state of bearing

Mechanical damage under normal circumstances, the high temperature mechanical damage of outer spherical bearing refers to the alloy surface appear different degrees of bearing groove tracks. High temperature bearing mechanical damage is the main reason of the outer spherical surface temperature was difficult to form the oil film bearing surface. High temperature bearing cavitation surface layer under repeated impact load cylinder pressure undergo plastic deformation and cold hardening, high temperature sliding outer spherical bearing. Local loss of deformation ability, and gradually form lines, not inflation, then with debris, the loading surface formation of cavity. When ordinary bearing from corrosion pits first appeared, and then pit gradually expand, result in the crack of the alloy layer interface, along the direction parallel to the interface of crack extension, until peeling off. High temperature sliding bearing of the main causes of cavitation is tank, a sudden change in the cross section of the oil hole and other structures, causing serious oil flow disturbance. Cavitation and wear usually occur in high load zone of high temperature bearing, such as the high temperature of the surface outside the crankshaft main bearing bush. Fatigue pitting due to overload, the initiator of outer spherical bearing of high temperature fatigue pitting refers to. High temperature bearing overheating, outer spherical high temperature bearing clearance is too large, the formation of fatigue damage and fatigue pitting or falls in the middle of the high temperature bearing. The damage is mostly due to overload, F high temperature bearing clearance is too large, or not clean, smooth oil caused by foreign body with internal. Therefore, we should pay attention to avoid high temperature spherical bearing overload, not too low or too high speed operation; Adjust the initiator to idle speed stable state; Ensure normal temperature spherical bearing clearance, avoid the initiator too fast or too low speed; Check and adjust the working status of the cooling system, ensure the initiator working at a comfortable temperature. Heat outside the spherical bearing alloy material corrosion in the oil station ( Acidic oxides) High temperature bearing alloy oxidation acid formed by the chemical impurities, the spherical bearing alloy corrosion ordinary temperature area is smooth in the oil. Through high temperature bearing alloy parts caused by scattering, irregular holes or small pits. High temperature lubricating oil is the main reason for the spherical bearing alloy corrosion inappropriate choice, spherical bearing materials with poor corrosion resistance, high temperature, or start homework mechanical MAO, the temperature is too high. Outside the spherical bearing high temperature impact burning-out of direct contact between the surface of the metal fine grained bump a high temperature, journal bearing friction and temperature. The lack of smoothness of poor cooling conditions, the temperature outside the spherical bearing alloy black and clamp. The disease often magazines and tight due to the high temperature bearing; The lack of lubricating oil pressure is easy to make the outer spherical bearing the high temperature burn. The previous: bearing rust to do, don't worry about here next article: no