rolling mill bearing

rolling mill bearing work under sliding friction bearings. Sliding bearing work steady, reliable, no noise. Under the condition of fluid lubrication, sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability. But starting frictional resistance is bigger. The double direction thrust ball bearing parts of the shaft are called journal, and shaft neck matching parts called bush. In order to improve the bearing surface of the friction properties and in them on the surface of cast anti-friction material layer is called the bearing bush. Bearing and bearing liner material collectively known as the sliding bearing material. Sliding bearing applications generally under the condition of low speed and heavy loading conditions, or maintenance and charging of lubricating oil is difficult work.

Factors influencing the performance of thin-walled ball bearing effect

When there are clearance fit between mobile crane bearing outer ring and bearing seat hole, the existence of eccentric distance m between the bearing center O and the bearing seat center O ', as shown in Figure 1.

  Because of the existence of the gap, the outer ring of the bearing, isolated point supported state, at this time the thin wall bearings under external load, the outer ring will be deformation occurred, causing the ball bearing load distribution of rolling mill bearing body load distribution and the rigid support compared have changed greatly, at the same time effect the thin-walled ball bearing service life, stiffness properties.

The introduction of slewing ring

Wheel bearings, slewing ring, also known, is a way to withstand large axial load, radial load and overturning moment of large self aligning ball bearings  Wheel bearings are generally with the mounting holes in the gear or external gear, lubrication holes and sealing devices, which enable the host compact design guide reliable, and easy maintenance.
     Wheel bearings with or without gear, external gear teeth and inside the four-point contact ball bearings, double row angular contact ball bearings, cylindrical roller bearings cross, cross tapered roller bearings and three-row cylindrical roller bearings and other kind of structure types. 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 make through preloaded bearings with a larger supporting rigidity and high rotation accuracy.
     Wheel bearings are widely used on lifting machinery, mining machinery, construction machinery, port machinery, shipbuilding, machinery and mechanical precision radar and missile launchers and other large rotary device.
Depending on the turntable bearing structure type structure can be broadly divided into the following types:
A four-point contact ball bearing turntable
2, double four-point contact ball bearing turntable
3. Cross cylindrical roller wheel bearings
4. Cross tapered roller wheel bearings
5, three-row cylindrical roller bearing turntable

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.