Select roll bearing method

The size of the roll bearing is limited by the installation space of the rolling mill (the inner diameter of the bearing and the outer diameter depend on the diameter of the roll neck and the roll body). The bearing has a small cross section and is a thin-walled bearing, and they must also bear a large radial load. Therefore multi-row roller bearings are used.

    At present, four-row cylindrical roller bearings and four-row tapered roller bearings are mainly used, and double-row cylindrical roller bearings and double-row tapered rollers are also used. Most of the tapered roller bearings adopt hollow roller and post cage. In order to improve the lubrication condition of the bearing, the outer surface and the end surface of the bearing are respectively provided with oil grooves and oil holes. When the gap is matched with the roll neck, the inner hole surface of the inner ring of the bearing A spiral oil tank is opened on the top.

    The structural form of the roll bearing is determined according to different types of rolling mills, different working conditions and different structural configurations. In general, four-row cylindrical roller bearings are easy to obtain high machining accuracy, so they have high-speed rotation characteristics, and are easy to install and disassemble, and can be used to press the inner ring raceway surface and the roll after the inner ring is pressed into the roll neck. Simultaneous grinding, which is beneficial to improve rolling precision. It is mostly used for high-speed, high-precision rolling mill support rolls. Four-row tapered roller bearings have large bearing capacity and can withstand both radial and axial loads. They are suitable for low and medium speed rolling mills. .