Fixed bearing positioning and installation steps

Fixed bearing is a one or a few raceway of thrust roller bearing ring parts. Use is acceptable in combination with fixed end bearing ( The radial and axial) Radial bearing load. These bearings include deep groove ball bearing, double row or matching single row angular contact ball bearings, self-aligning ball bearing, spherical roller bearings, with groups of tapered roller bearings, NUP type cylindrical roller bearings or circle with HJ Angle of NJ type cylindrical roller bearing. In addition, the fixed end bearing configuration can contain a combination of two bearings: 1, can only accept the radial bearing radial load, such as one of the cylindrical roller bearing ring without guard. 2, provide axial positioning bearing, such as deep groove ball bearing, four-point contact ball bearing or two-way thrust bearing. Be axial positioning bearing can never be radial orientation, usually on the bearing device with smaller radial clearance. There are two ways to comply with the floating bearing axial thermal displacement. First to use a can only accept the radial load and allowable bearing axial displacement of the attack on the inside of the bearing. These bearings include: CARB toroidal roller bearings, needle roller bearing, and a ring without a guard of cylindrical roller bearing. Another approach is to use a device on the bearing seat with a smaller radial bearing radial clearance, so that the outer ring can ease the earth's axis to move. Fixed bearing positioning way 1, lock nut positioning method: USES the interference fit of bearing inner ring device, usually on inner ring on a shaft shoulder, on the other side is normal with a lock nut ( KMT or KMTA series) Fixed. With taper hole of the bearing device directly on the cone axis neck, usually with a lock nut is fixed on the shaft. 2, spacer positioning method: between the bearing ring or between the bearing ring and adjacent parts adopt spacer or baffle, instead of whole shoulder or bearing shoulder, it is very convenient. Under these conditions, the size and shape tolerance can also be applied to relevant parts. 3, ladder shaft sleeve positioning: another kind of bearing axial positioning method is to use ladder shaft sleeve. These sleeves fit precision bearing configuration, compared with the threaded lock nut, beating its smaller, provide higher accuracy. Ladder shaft sleeve is usually used in ultra high speed spindle, about the spindle, the traditional lock installation are unable to offer the enough precision. 4, the fixed end cover localization method: USES the interference fit of bearing outer ring gear, often make the outer side rely on the shoulder, on the bearing seat with a fixed end cover is fixed on the other side. Fixed end cover and the fixed screw on the bearing shape and performance in some situations have a negative impact. If the wall thickness between the bearing and the screw hole is too small, or screw fastening too tight, outer ring raceway may be out of shape. The lightest ISO size 19 series is heavier than 10 series, or series of more vulnerable to the impact of such damage. Fixed bearing device of step 1, the shaft bearing before, must first remove the fixed bearing a coat of fixed pin, lubrication burnish of shaft neck appearance clean at the same time, and in the shaft neck oil and antirust and smooth ( Allows the bearing to slight rotation axis) 。 2, smooth coating on surface of the bearing and the bearing with oil, put the double row circular cone roller bearings into the bearing seat. And then will set good bearing and the bearing assembly on the shaft, pushed to the required location stop device. 3, fixed bolts do not tighten the bearing seat, to make the bearing coat in bearing internal energy. Also installed on the same axis and on the other side of the bearing, axis, turn a few laps, automatic alignment position for fixed bearing itself. Then good bearing bolts. 4, eccentric sleeve. The eccentric sleeve device strong, finally lock eccentric sleeve on the socket head cap screw. The factors affecting the quality of bearing 1, structure design and advanced at the same time, there will be a long bearing life. Bearing manufacturing through forging, heat treatment, cutting, grinding and assembly process operation. Disposal of rationality, advancement, stability will also affect the use of the bearing life. Affect the bearing heat treatment and grinding process, often have a more direct relationship with bearing fault related amount of yield and quality. In recent years, the discussion of bearing outside the deterioration of the surface state, intimacy and bearing appearance quality related in the process of grinding. 2, bearing materials metallurgy are the main factors influencing the quality of early failure of rolling bearings. With the progress of metallurgical technology ( Such as bearing steel, vacuum degassing, etc. ) , advances the quality of the original data. The proportion of the original data quality elements in bearing fault analysis was clear to land, but it still is one of the key elements of bearing failure. Can choose appropriate bearing fault analysis is needed to think. 3, after the bearing device, in order to check the device correctly, to stop check. Small mechanical energy enough hand rotation, to confirm whether it can rotate smoothly. Check project has formed as a result of foreign bodies, scars, indentation seized up, due to the bad device, device processing torque instability as a result of the bad, because the clearance is too small, installation error, seal friction and provoked torque is too big, and so on. If there is no abnormal moving force to start running. If bearing attack serious conditions and for some reason, hot, bearing should be removed, find out the reason for the fever; If the bearing fever accompanied by noise, may be bearing cover and shaft wipe or smooth thin and fat. In addition, still can use hand bearing outer ring, rotation, if it does not have loose phenomenon, turn the smooth, the bearing is good; If with loosening or jamming in turn, are elucidated bearing defects, should further analysis and find the reason at this time, to the bearing can continue to use.