2014年12月24日星期三

Thrust ball bearings running track installation methods judgment


When truck mounted crane bearing rotates when the raceway thrust ball bearing inner and outer rings and rolling elements due to rolling contact, so run track for the dark side, running track attached to the roller surface are not unusual, thus becomes load conditions can be learned, so when dismounting bearings, please pay attention and observe strict raceway running track.
Thrust ball bearings are correctly installed, affecting accuracy, longevity, performance. Therefore, the design and assembly department to adequately studied bearing installation. I hope to be in accordance with the operating standards for installation. Operating standards of the project generally as follows:
(1), cleaning bearings and related components
(2), size and finishing Check the connected components
(3), the installation
(4) After installation check the bearings
(5), supplying lubricant
Immediately prior to installation, open wind power bearing package. General grease lubrication, no cleaning, directly filled grease. Lubricating oil, do not clean the ordinary, however, the instrument used or high-speed bearings, etc.
Oil use clean wash, remove coating on the bearing rust inhibitor. Removing the bearing rust inhibitor, rust, it can not be placed in the air. For have a grease-enclosed bearing, can be used directly without washing.
four point contact ball slewing bearing installation method, because the bearing structure, with the condition varies, in general, due to multi-axis rotation, so the inner need interference fit. Cylindrical bore bearings, the use of press push, or by hot charging methods. Cone of the occasion, mounted directly on the tapered shaft or sleeve installation.
When mounted to the housing, usually with more clearance, the outer ring interference, usually pressed into the press or shrink fit method also cooling installation. With dry ice as coolant, shrink fit installation situations, moisture in the air will condense on the surface of the bearing. Therefore, proper corrosion protection.
If you look at the trajectory, then this will only burden that radial load to bear large axial load, to withstand the torque load on the bearing housing or extreme rigidity inequality. You can check whether the bearing loads and unexpected plus installation errors, such as whether the ANC and became prosecuted bearing loss for clues to the cause.

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