CN111237330A

CN111237330A - Four-row cylindrical roller bearing for rolling mill

Info

Publication number: CN111237330A
Application number: CN201811439126.3A
Authority: CN
Inventors: 刘萍萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2020-06-05

Abstract

The invention relates to a four-row cylindrical roller bearing for a rolling mill, wherein 2 rollers capable of freely rotating are clamped between two adjacent supporting columns in a bearing retainer, concave oil storage grooves are formed in two end surfaces of each roller, oil passing grooves are formed in edges of the supporting columns, curved surfaces matched with the rollers are formed on the surfaces, facing the rollers, of the supporting columns, lubricating grooves communicated with the oil passing grooves are axially formed in the bottoms of the curved surfaces of the supporting columns, and a bearing outer ring, a bearing inner ring, the retainer and the rollers are all made of steel materials. The bearing changes the original bearing outer ring middle flange into a rolling body bearing area, the roller is lengthened, the bearing dynamic load is improved by about 15 percent, and the service life is effectively prolonged; the steel retainer is adopted, so that the bearing is light in weight, high in strength, good in lubrication, suitable for high rotating speed, free of deformation in a high-temperature environment and enlarged in service area.

Description

Four-row cylindrical roller bearing for rolling mill

The invention relates to the technical field of bearings, in particular to a four-row cylindrical roller bearing for a rolling mill.

At present, people often use four-row cylindrical roller bearings with comb-shaped copper retainers in steel rolling production, under the condition of normal work of the bearings, the radial load of the bearings completely meets the requirement of rolling, the use effect is good, but the overtravel grooves formed in the outer rings of the bearings are more, the bearing load is smaller, the strength of the retainers is lower, and the lubrication state is not good.

When the rolling load of the bearing is larger, the impact load is larger, and the speed is higher, the bearing damage rate is increased along with the rolling load, and larger economic loss is brought to a steel mill.

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the four-row cylindrical roller bearing for the rolling mill is provided, and the defects of low bearing strength and poor lubricating effect when the bearing rolls steel with certain requirements are overcome.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a four-row cylindrical roller bearing for rolling mill, is enclosed by two the same bearing retainer juxtaposition at the bearing inner race, and two bearing retainer all are provided with corresponding bearing inner race, are provided with well shelves circle between two bearing inner races, and the outside limit of two bearing inner races is provided with both sides retaining ring, and the centre gripping can be from by pivoted roller between the two adjacent pillars in the bearing retainer, the quantity of the roller of centre gripping is 2 between two pillars, has the oil storage tank of indent on the roller both ends face, is provided with the oil groove on the edge of pillar. The oil storage tank can effectively store lubricating oil filled in the bearing, so that the end face of the roller can be kept lubricated all the time, and the service life of the roller is prolonged.

Furthermore, a curved surface matched with the roller is formed on one surface of the support column facing the roller, and a lubricating groove communicated with the oil passing groove is axially formed in the bottom of the curved surface of the support column. The design of the oil passing groove facilitates the contact of lubricating oil and the roller, and provides a lubricating groove to prolong the lubricating time of the roller.

Furthermore, the two bearing outer rings are provided with lubricating holes for filling lubricating oil.

Furthermore, the bearing outer ring, the bearing inner ring, the retainer and the roller are all made of steel materials.

The invention has the beneficial effects that: the invention provides a four-row cylindrical roller bearing for a rolling mill, which is characterized in that the middle edge of an outer ring of an original bearing is eliminated and is changed into a rolling element bearing area, rollers are lengthened, the dynamic load of the bearing is improved by about 15%, and the service life is effectively prolonged; an oil groove is designed on the support of the retainer, so that the bearing is lubricated more fully, the oil content of the bearing is higher, and 10% of lubricating grease can be stored; the steel retainer is adopted, so that the bearing is light in weight, high in strength, good in lubrication, suitable for high rotating speed, and free of deformation in a high-temperature environment, and the service surface of the bearing is enlarged.

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic half-section of a bearing;

fig. 2 is a schematic structural view of the cage.

Fig. 3 is a schematic view of the structure a-a in fig. 2.

Fig. 4 is an enlarged view of the layout at B in fig. 2.

Fig. 5 is a schematic view of the structure of the roller.

Wherein: 1. 1-1 parts of rollers, 2 parts of oil storage grooves, 2 parts of supporting columns, 2-1 parts of lubricating grooves, 2-2 parts of oil passing grooves, 3 parts of bearing inner rings, 4 parts of bearing outer rings, 4-1 parts of lubricating holes, 5 parts of side retainer rings, 8 parts of middle retainer rings.

The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the four-row cylindrical roller bearing for the rolling mill is characterized in that two identical bearing retainers are juxtaposed on a bearing inner ring 3, the two bearing retainers are both provided with corresponding bearing outer rings 4, a middle retaining ring 8 is arranged between the two bearing outer rings 4, two retaining rings 5 are arranged on the outer sides of the two bearing outer rings 4, and lubricating holes 4-1 for filling lubricating oil are formed in the two bearing outer rings 4;

rollers 1 capable of freely rotating are clamped between two adjacent support columns 2 in the bearing retainer, the number of the rollers 1 clamped between the two support columns 2 is 2, and two end faces of each roller 1 are provided with concave oil storage tanks 1-1; the oil storage tank 1-1 can effectively store lubricating oil filled in the bearing, so that the end face of the roller 1 is kept smooth all the time, and the service life of the roller 1 is prolonged.

A curved surface matched with the roller 1 is formed on one surface of the support column 2 facing the roller 1, an oil passing groove 2-2 is formed on the edge of the support column 2, and a lubricating groove 2-1 communicated with the oil passing groove 2-2 is axially formed at the bottom of the curved surface of the support column 2; the oil passing groove 2-2 is designed to facilitate the contact of lubricating oil with the roller 1, and the lubricating groove 2-1 is provided to prolong the lubricating time of the roller 1.

The bearing outer ring 4, the bearing inner ring 3, the retainer and the roller 1 are all made of steel materials.

The middle flange of the bearing outer ring 4 is cancelled, and the original region of the middle flange is changed into the rolling element bearing region, so that the roller 1 can be longer, the dynamic load of the bearing is improved by about 15%, and the service life is effectively prolonged; an oil groove 2-2 is designed on the retainer strut 2, so that the bearing is lubricated more fully, the oil content of the bearing is higher, and 10% of lubricating grease can be stored; the steel retainer is adopted, so that the bearing is light in weight, high in strength, good in lubrication, suitable for high rotating speed, free of deformation in a high-temperature environment and enlarged in service area.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The four-row cylindrical roller bearing for the rolling mill is characterized in that: the bearing retainer is characterized in that two identical bearing retainers are juxtaposed on a bearing inner ring (3), the two bearing retainers are provided with corresponding bearing outer rings (4), a middle retainer ring (8) is arranged between the two bearing outer rings (4), two side retainer rings (5) are arranged on the outer side edges of the two bearing outer rings (4), rollers (1) capable of freely rotating are clamped between two adjacent support columns (2) in the bearing retainers, the number of the rollers (1) clamped between the two support columns (2) is 2, oil storage grooves (1-1) with concave recesses are formed in the two end faces of the rollers (1), and oil storage grooves (2-2) are formed in the edges of the support columns (2).

2. The four-row cylindrical roller bearing for a rolling mill according to claim 1, characterized in that: one surface of the support post (2) facing the roller (1) is provided with a curved surface matched with the roller (1), and the bottom of the curved surface of the support post (2) is axially provided with a lubricating groove (2-1) communicated with the oil passing groove (2-2).

3. The four-row cylindrical roller bearing for a rolling mill according to claim 1, characterized in that: and the two bearing outer rings (4) are provided with lubricating holes (4-1) for filling lubricating oil.

4. The four-row cylindrical roller bearing for a rolling mill according to claim 1, characterized in that: the bearing outer ring (4), the bearing inner ring (3), the retainer and the roller (1) are all made of steel materials.