Background technique

With the rapid development of economic construction in our country, metallurgical industry equipment continuously reform and upgrade, metallurgical production capacity and production efficiency continuously improve, at the same time, in order to further reduce production cost, its requirements for the use of rolling mill bearings are also getting higher and higher.

First of all, the rolling amount of each set of bearings is increasing, that is, the service life of bearings is improved. Secondly, with the continuous improvement of rolling speed, the requirement of rolling mill bearing speed is also increasing. In addition, in order to improve production efficiency and shorten roll changing cycle, the requirements of rolling mill bearing roll changing and maintenance convenience are also improved. At present, the aluminum foil rolling mill uses four row cylindrical roller bearings, which are inconvenient to install and maintain, have long roll changing cycle, serious heating under high-speed operation, and correspondingly low service life, which can not meet the requirements of the current high speed aluminum foil rolling mill for bearing use.

Utility model content

To solve the above technical problems, the utility model designs a four-row cylindrical roller bearing for high speed aluminum foil rolling mill.

1. The structure of four brass cage, each brass cage is installed in a row of rollers, cage end is installed with a stop ring, so as to form a rolling body and cage components, stop ring on the one hand can prevent the roller in the assembly and transportation process, on the other hand can reduce the cage axial movement. Compared with the traditional brass cage four-row cylindrical roller bearings with double jaw type, the component is simple in structure and convenient in installation. It is especially suitable for the occasion of high-speed rotation, and avoids the phenomenon of cage fracture caused by the inconsistent rotation speed of the two rows of rollers caused by the impact and lag of the traditional structure bearings in the process of high-speed rotation.

2. A movable partition ring is arranged between two columns of cylindrical rollers located in the outer ring of the same body; One end of the outer ring is installed with a flat retaining ring, the other end is installed with a middle retaining ring, constituting an outer component; There are oil grooves and oil openings between the outer ring and the movable insulation ring. The bearing external high-pressure oil mist or oil and gas enter the bearing through the oil groove and oil hole on the outer ring and the movable insulation ring. In addition, circular grooves are also opened on both sides of the oil groove on the movable separation ring to facilitate the lubricating oil mist or oil and gas to enter the contact part of the roller and the raceway. In order to prevent high pressure oil mist or oil and gas leakage, the outer ring is slotted and installed with a type 0 sealing ring. Compared with traditional structure bearings, the space between the two cages of the bearing is relatively wide, which is more conducive to a large number of high pressure oil mist or oil and gas entering the bearing to participate in lubrication. The inner diameter surface of the retaining ring of the bearing is also provided with an oil groove and an oil hole, which is more conducive to the outflow of excess lubricating oil mist or oil and gas, forming a lubrication cycle. In addition, in order to further improve its lubrication and cooling effect, the two ends of the outer ring are provided with a circular arc oil groove, which can further improve the efficiency of lubricating oil mist or oil and gas outflow and take away heat. Therefore, the bearing burning phenomenon caused by too fast temperature rise during high-speed rotation can be effectively avoided.

3. The outer ring of the bearing has no middle retaining edge, and there is no oil groove at the transition part of the raceway and the retaining edge. Instead, the movable baffle ring is adopted, which on the one hand avoids the breaking phenomenon of the retaining edge caused by the stress concentration of the oil groove when the bearing is affected. Thus improving the service life of bearings.

4. During assembly, the outer component is installed on the inner ring, and the inner ring and roll interference are installed together. The inner ring diameter of the traditional bearing is an installation chamfer, and the inner ring diameter surface of the bearing is an inclined plane.

Effect evaluation

The bearing structure of the utility model has the characteristics of good lubrication condition, small temperature rise, large bearing capacity, long service life and convenient installation and maintenance, which can well adapt to the working condition requirements of high-speed aluminum foil rolling mill, and the service performance and service life are significantly improved compared with the traditional four-row cylindrical roller bearing.