Adjust the axial clearance. The installation axial clearance of tapered roller bearing can be adjusted by adjusting nut, adjusting gasket on journal and thread in bearing seat hole, or by pre tightening spring. The size of axial clearance is related to the arrangement of bearing installation, the distance between bearings and the materials of shaft and bearing seat, which can be determined according to the working conditions.
For tapered roller bearings with high load and high speed, when adjusting the clearance, the influence of temperature rise on axial clearance must be considered, and the reduction of clearance caused by temperature rise must be estimated, that is, the axial clearance should be adjusted appropriately.
Bearings with low speed and bearing vibration shall be installed without clearance or preload. Its purpose is to make the roller and raceway of tapered roller bearing have good contact, the load is evenly distributed, and prevent the roller and raceway from being damaged by vibration and impact. After adjustment, the axial clearance shall be checked with a dial indicator. Installation method of thrust tapered roller bearing
Thrust cylindrical roller bearing and thrust needle roller bearing are suitable for occasions with low speed. The speed of thrust tapered roller bearing is slightly higher than that of planar thrust bearing. Thrust bearing mainly bears axial load in the assembly and is widely used. Although the thrust bearing installation operation
The gear shall be designed with axial positioning steps. The outer ring of the bearing shall be locked, and the outer side of the inner ring shall be locked with a locking nut. The pre tightening force for locking shall be set according to the application conditions.
Generally, tapered roller bearings can be used face-to-face and back-to-back. The clearance group should be selected according to the bearing size you choose and the transmission accuracy required by the mechanism! As for the adjustment method, it can be realized by pressing and loosening!
Rotary table bearing is a kind of large-scale bearing with special structure, which can bear large comprehensive loads such as axial load, radial load and overturning moment at the same time, and integrates multiple functions such as support, rotation, transmission and fixation. Therefore, when installing the rotary table bearing, we must do a good job in relevant inspection or matters needing attention during installation. For this large bearing, we must do a good job in maintenance and storage, so as to avoid the following damage to the rotary table bearing, resulting in failure of normal use.
Before the installation of the rotary table bearing, the installation surface of the main engine shall be checked. The support shall have sufficient strength, the connecting surface shall be machined, and the surface shall be flat without sundries and burrs.
For those that cannot be machined to achieve the required flatness, special plastic with high injection strength can be used as filler to ensure the accuracy of installation plane and vibration reduction. The ring of the rotary table bearing has a quenched soft belt area, which is marked with “s” on the end face of the ring. During installation, the soft belt shall be placed in the non load area or non frequent load area (the plug hole is always located at the soft belt).
When installing the rotary table bearing, conduct radial positioning first, tighten the mounting bolts crosswise, and check the rotation of the bearing. There shall be sufficient pre tightening force when tightening the bolt, and the pre tightening force shall be 70% of the yield limit of the bolt material. The mounting bolts shall be equipped with quenched and Tempered Flat Washers, and the use of spring washers is strictly prohibited.
after 100 hours of continuous operation of the installed and put into operation rotary table bearing, comprehensively check whether the pre tightening torque of the mounting bolt meets the requirements, and repeat the above inspection every 500 hours of continuous operation in the future.
After the installation of the rotary table bearing, an appropriate amount of grease shall be filled, and the bearing shall be rotated while filling to make the grease evenly distributed. After working for a period of time, the rotary table bearing will inevitably lose some lubricating grease. Therefore, the lubricating grease of the rotary table bearing in normal operation should be supplemented every 50 ~ 100 hours.
during transportation, the bearing shall be placed horizontally on the vehicle, and measures shall be taken to prevent sliding and vibration, and auxiliary support shall be added if necessary.