2014年11月24日星期一

Installation and maintenance of wheel bearings

Slewing ring bearings is a way to withstand the large axial load, radial load and overturning moment of large bearings. Wheel bearings generally come with mounting holes, internal gear or external gear, lubrication holes and seals, which enables a host compact design guide reliable, easy maintenance.Have toothed wheel bearings, the outer and inner tooth tooth four-point contact ball bearings, double row angular contact ball bearings, crossed cylindrical roller bearings,
tapered roller bearings and cross three-row cylindrical roller thin section angular contact bearings, and other kind of structure type. Where the four-point contact ball bearings with high static load capacity; Cross cylindrical roller bearings with high dynamic load capacity; cross-tapered roller bearings through preloaded make bearings with a larger supporting rigidity and high rotation accuracy.
Wheel bearings are widely used in lifting the machinery, mining machinery, construction machinery, port machinery, shipbuilding, machinery and mechanical precision radar and missile launchers and other large rotating equipment.
1, the turntable bearing installation    FAG wheel rolling mill bearing before installation, first host of the mounting surface inspection, require support should have sufficient strength to be machined connecting surfaces, smooth surface free of debris and burrs. For the flatness can not be machined to achieve the desired, the injection may be used to make high-intensity special plastic filler, to ensure the accuracy of the mounting surface and means for damping. FAG wheel bearing rings have hardened soft-band region, which in the end face of
the ferrule are marked "S", should be installed so that the soft band position often placed in non-load area or load area (plug hole is always located soft with Office).
When installing FAg wheel bearings, should act to advanced positioning, cross-tighten the mounting bolts and check bearing swivel case. Tighten the bolts should have sufficient preload, its preload bolt material should yield 70% limit. Mounting bolts should be equipped with tempered flat washer and spring washer is strictly prohibited.
2, FAG wheel bearings installed and put into operation and maintenance of wheel bearings after 100 hours of continuous operation, check the mounting bolts should be fully meets the requirements of tightening torque, after 500 hours of continuous operation repeat the inspection every. FAG wheel bearings installed should be filled with the right amount of grease, and should be filled side to side swivel bearing the grease evenly distributed.
Wheel bearings at work for some time, will inevitably lose some of the grease, so the normal operation of the wheel bearings at intervals of 50 to 100 hours after a grease should be added.
3, transport and storage of spindle bearing FAG wheel bearing during transport, should be placed on the vehicle, sliding and prevent proper measures to prevent vibration, plus auxiliary
support when necessary.

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