Import & Export & Mechanical - Centbro International Trading Co, LTD.
Thrust self-aligning roller bearing with needle or cylindrical roller or ball thrust cage assemblies and thrust washer. In conjunction with the thrust roller bearing washer series, can provide many different combinations for bearing configuration. Because of the high precision cylindrical roller (roller) to increase the contact length, the bearing for high load capacity and high stiffness in a small space. Another advantage is that the surface of the adjacent parts can be omitted when the surface of the adjacent parts can be used as a rolling surface, so that the design is compact, and the cylindrical surface of the cylindrical roller is used for repairing the surface, which can reduce the edge stress and improve the service life.
Working Principle Of Bearing
Thrust self-aligning roller bearing is separable bearing, can withstand axial load and slight impact, can limit axis (or shell) a direction of the axial displacement, it can be used as a one-way axial positioning. But its bearing capacity is far greater than the thrust ball bearing. Roller rolling, the roller ends of lines at different speeds, the roller raceway in the ring sliding inevitably arise, therefore, such bearing limit rotational speed is low thrust ball bearings, usually only for low speed applications. Thrust self-aligning roller bearing thrust roller bearing standard design of the metal entity keep a car, according to user requirements, can also use other types or cage materials. Thrust tapered roller bearings can only be subjected to one-way axial load, can limit the axial displacement of the bearing, it can be used as a one-way axial positioning. Compared with the thrust cylindrical roller bearing, the bearing capacity is large, the relative sliding is small, but the limit speed is low.
Bearing Performance Characteristics
1、Thrust self-aligning roller bearing outer ring and bearing shell hole should not be used in interference fit, the inner ring and shaft neck with not too tight, requiring the use of nut adjustment in the installation should make axial displacement more flexible. Because the thrust roller bearings if the interference fit, easy to make the bearing contact angle change caused by the uneven distribution of bearing load, caused by high temperature rise. Therefore, the inner and outer ring of the bearing and the shaft neck and the bearing housing hole of the installation, the general should be with both hands thumb can be thrust into the journal and the housing bore hole for the best.
2、For the installation of the axial clearance of thrust self-aligning roller bearings, shaft neck threads available adjusting nut and shim and the bearing base hole, or with a preloaded spring adjustment method. The axial clearance size, and bearing installation of the bearing arrangement, the distance between the shaft and the bearing seat, the material can be determined according to the working conditions. For thrust roller bearings at high speed high load, adjust the clearance, must consider the temperature effect on the axial clearance, the temperature rise caused by windage reduction estimation, that is to say, the axial clearance to adjust a little bigger. For the low speed and bearing vibration of bearing, should be adopted without clearance or preload installation, installation. Its purpose is to make the roller thrust roller bearing and roller have good contact, evenly distributed load, prevent the roller and the raceway is destroyed by vibration and shock. After adjustment, the micrometer size axial clearance test. The first method is to dial fixed in the body or the bearing seat, the contact surface of the shaft of the dial to finish, along the axial direction around the push shaft, the maximum swing is the axial clearance value.
Main Use Of Bearings
This type of bearing is mainly used in oil drilling, making iron steel machinery, hydraulic generator, vertical motor, propeller shaft, ship crane, extrusion machine etc.