How to determine whether composite roller bearings need to change

Advantage is thin oil lubrication: roller bearing internal friction coefficient is small, so to overcome the friction consumes less energy, thin oil good liquidity, easy into all lubricating points of friction surface, has the good cooling effect. And adhesion on the friction surface impurities and can be produced by grinding metal particles away. The disadvantage is that the oil film cannot unit under big pressure, high requirement for sealing. High speed press with large flow dilute oil lubrication, more commonly can take away the heat generated by the friction pair. Composite roller bearing manufacturer side roller through the spindle is installed inside the shaft head, main roller set on the outside of the shaft head, cover plate is at the end of the shaft head nut fixed, several partial fixed together. Composite roller bearing shell divided into adjustable according to the structure design and is not adjustable adjustable can be divided into gear adjustment, hexagonal adjustment, nut adjustment gear adjustment for the side roller inner ring ( The spindle) Processed into eccentric gear shape on both ends, the spindle and the spindle head connection partial also design for gear shape, by adjusting the amount of eccentric gear to regulate the amount of convex side roller to adjust the height of the entire composite roller. Hexagonal eccentric adjustment and gear adjustment for the same principle, the rear gear for hexagonal eccentric, by adjusting the hexagon to adjust the overall height of composite roller, gear adjustment, compared hexagonal regulating stability of composite roller, load intensity is higher. Nut to adjust is the lateral wheel mounted on a shaft frame into the shaft head inside, through the shaft head of two head set screws to adjust axis ( Side roller) The projection quantity to adjust the overall height of bearing, compared the two ways above, nut to adjust for the design, need not disassemble the bearing, simple and convenient adjustment. Do not adjust the side roller inner ring ( Core shaft) For cylinder connected to the spindle head, rotating, compared with the adjustable, this structure is suitable for stable without regulating function of equipment, and capital is low. Composite roller bearing availability check, mainly considering the one-way bearing damage degree, mechanical properties, importance, and operating conditions, to the next overhaul period. If there are the following defects can't use, need to change the new composite roller bearing. The inner ring and outer ring, rotating body, keep any one have crack or gap. Most of the bearing damage for many reasons - — Than the original estimate of load, the effective sealing, is too small, as a result of tight coordination compound roller bearing clearance, etc. Any of these factors factors there is its special damage forms and will leave a special signs of deterioration. Examine damaged shaft bearing, therefore, in most cases can find its possible causes, Outlines, one-third of the one-way bearing damage resulting from the fatigue damage, a third of the other resulting from poor lubrication, a third of the other resulting from pollutants into the bearing improper handling or installation. Composite roller bearing has burn injury refers to: wheel bearing raceway, the rotating body and maintains a sharp heat until discolored in reverse, softening, deposition and damaged. The second is probably too big load ( Preloading is too big) 。 Speed is too large. Clearance is too small. With water or other foreign matter invasion. If the above two cases are not hot yao is the axis, the accuracy of bearing box, shaft deflection. See here, I think everyone wants to know the solution, first of all, to study lubricants and lubrication method, choose the right compound roller bearing lubricant, and its dosage, and to select the correct bearing. Study to cooperate, bearing clearance, and preloading, and improve the sealing device. 1, bearing maintenance: for as long as possible to maintain the performance of the bearing was on good condition and must be maintenance, repair, in order to Hyman disorderly arrangement to ensure the reliability of operation, productivity and economy progress. Maintenance conditions of mechanical operation of the corresponding operation standard, on a regular basis. Contents include monitoring operation condition, supplement or replacement of lubricants, remove the check on a regular basis. In the operation maintenance item, a one-way bearing torsional sound, vibration, temperature, the condition of the lubricant and so on. 2, composite roller bearing maintenance: bearing cleaning: removing bearing under repair, first record the appearance of the bearing, confirm the residual stock of lubricant, sampling inspection with lubricant, bearing. Common use gasoline, kerosene as a cleaning agent. Tear open come down to the bearing cleaning, rough washing and fine washing, respectively in the container, put a metal mesh bottom first, make the bearing is not direct contact with dirt from the container. Coarse when cleaning, if make the bearings with dirt, can injure the rotation of the bearing surface, should be pay attention to. In coarse clean oil, use a brush to remove grease, adhesive, after clean, roughly into fine cleaning). Fine cleaning, is a composite roller bearing in to clean oil in reverse, carefully clean. In addition, the clean oil is always kept clean. 3, maintenance and calibration of composite roller bearing: removed in order to check the bearing whether can use, check after wash composite roller bearing. Check the raceway surface, turn the plane, with the situation, the abrasion of cage, the increase of the one-way bearing clearance and has nothing to do with dimension precision falling damage, abnormal. Non separation of small ball bearing, the inner ring with one hand support level, reverse confirm whether smooth outer ring.