Analysis of import one-way bearing raceway noise fault anomaly analysis

Installed in institutions, there is the part of the one-way bearing a certain temperature, when the hand touch body shell, should not feel hot as normal, and indicates the TIMKEN bearing temperature is too high. The cause of the high bearing temperature are: lubricating oil quality does not conform to the requirements or metamorphism, lubricating oil viscosity is too high; The assemble tight ( Inadequate clearance) ; Import bearing assembly too tight; Bearing race in internal rotation shaft or housing; Too much load; Bearing cage or rolling body fracture, etc. The functioning of the rolling bearing in the work to allow a slight noise, if you have any abnormal noise or excessive noise or sound, suggests that the bearing failure. Cause noise of rolling bearings is more complex, one is the bearing inner and outer surface wear. Due to this kind of wear and tear, damage the bearing and shell, bearing and shaft cooperate relationship, lead to axis deviation from the correct position, when axis at high speed movement produces sound. When a one-way bearing fatigue, its surface metal flake, also can produce sound make bearing radial clearance increases. In addition, the bearing lubrication, forms the dry friction, and bearing broken etc all make abnormal noise. After bearing wear loose, loose cage damaged, also can produce sound TIMKEN bearing damage. Rolling bearings to remove check, according to the damage of bearing bearing failure and damage reasons. The so-called pressure constant is the use of helical spring pretightening, disc spring, give appropriate preparation method of the bearing. When use, even though the bearing changing the relative position, loading method in advance. When use bearing what type of seal? , it will even the change of relative position, preload can maintain. Bearing preload pressure constant pre-tightening force diagram, the preload of the bearing stiffness of spring rigidity is usually very small, so the deflection of the spring line, compared with roughly parallel to the horizontal axis, therefore, preset pressure monomer one-way bearing load imposed preload and the rigidity of the axial load bearing rigid monomers is roughly equal. Preload, the relative rigid monomers constant pressure bearing and the bearing pre-tightening force of positioning. Imported bearing raceway groove sound sound and its control method for when the TIMKEN bearing running, roller rolling on the surface of the raceway of gliding sound continuously, is unique to occur in all rolling bearings of the basic sound. General bearing ring raceway is combined with other sounds. Ball bearing raceway is irregular, frequency above 1000 hz, its main frequency does not change with speed, but its total sound pressure level increases with speed to speed up. Raceway large bearings, the rolling sound of sound pressure level decrease with the increase of the viscosity; The raceway small bearings, the sound pressure level in the viscosity increases to about 20 was/s above, from decreased to increase somewhat. And the rigidity of the bearing, the greater the raceway of the lower the total sound pressure level. Such as radial clearance is too small, the total sound pressure level and race master frequency will increase sharply with the decrease of radial clearance. Method to control the sound of raceway are: choose low noise one-way bearing is bearing waviness is very small, that is, carefully select and use conditions. Race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise. One-way 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 bearing load is too big, can make the fatigue. In addition, the bearing installation 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. Bearing burn burn bearing the 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 bearing assembly too tight. 3. Plastic deformation of bearing raceway and roller contact surface appear uneven pits, TIMKEN bearings produce plastic deformation. The reason is 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. The causes of cracks in the bearing race crack produced one-way bearing race may be bearing fit too tight, loose foreign or bearing 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.