CN204371947U - A kind of thrust bearing of rolling mill working roller - Google Patents

Abstract

A rolling mill work roll thrust bearing is mainly used in the iron and steel industry, and is used at both ends of the Sendzimir work roll. It is composed of bearing outer ring, inner ring, cage, rolling body and flat retaining ring; the rolling body is single row cylindrical roller; the cage is a single claw cage structure; the inner ring is a single rib inner ring, and the flat retaining ring is set inside There is no side of the ring to form an open structure. The structure of single-row cylindrical roller and single-jaw cage reduces the processing difficulty of the cage. The cage adopts a special structure and utilizes the special relationship between it and the rib of the inner ring to achieve axial and radial bidirectional directions of the cage. The effect of positioning, it can run smoothly under the action of high-speed rotation and impact load. The inner ring adopts a single rib structure, which can not only provide axial and radial positioning of the cage, make the installation of the cage more convenient, but also increase the radial thickness of the cage and strengthen the strength of the cage.

Description

A rolling mill work roll thrust bearing

technical field

The utility model relates to a thrust bearing of a work roll of a rolling mill, which is mainly used in the iron and steel industry, and is used at both ends of the work roll of a Sendzimir rolling mill.

Background technique

The back-up roll bearings of the high-speed Sendzimir mill originally used full complement cylindrical roller bearings with retaining rings, which mainly bear radial impact loads and require high speed. Due to the structural characteristics of the bearing, the speed of the full complement cylindrical roller bearing is relatively low, there are retaining rings on both sides, and the lubrication conditions are poor. During use, rapid acceleration or deceleration often occurs, and the temperature rise of the bearing is high when it rotates at high speed. The transition fit with the shaft, the inner diameter of the inner ring and the shaft often have relative movement during operation, causing the temperature of the bearing to rise, the outer ring of the bearing often cracks and "locks", and the service life is short. And because the Sendzimir rolling mill requires high bearing precision and the bearing here is relatively small, the product precision cannot meet the requirements.

Contents of the invention

In order to solve the problems in the above-mentioned prior art, the present invention provides a high-speed Sendzimir rolling mill work roll thrust bearing

In order to achieve the above purpose, the technical solution adopted by the present invention to solve its technical problems is a rolling mill work roll thrust bearing, which is composed of a bearing outer ring, an inner ring, a cage, rolling elements and a flat retaining ring; the rolling elements are single row cylindrical roller bearings. The cage is a single claw cage structure; the inner ring is a single rib inner ring, and the flat retaining ring is set on the side of the inner ring without ribs, forming an open structure. Several oil holes are arranged on the peripheral wall of the inner ring, and the oil holes are through holes. The cage includes a grasping segment and a connecting ring segment, and the connecting ring segment is arranged in a groove-shaped space surrounded by the outer ring of the bearing and one side of the single rib.

According to the specific values such as the impact load and the working speed of the bearing, after analysis and calculation, an optimal technical solution is selected, the bearing structure is selected, and the most suitable main parameters are selected, including a thickened single-raceway outer ring and a single-rib inner ring. ring, a flat retaining ring, a single-jaw cage, and the diameter, length, and quantity of rolling elements. The rolling elements are put into the outer ring of the bearing and separated evenly, then the cage is put into the outer ring of the bearing, the rolling elements are evenly separated, then put into the inner ring from the same side, and finally put into the flat retaining ring from the other side to form a set Set of bearings.

After adopting the above scheme, compared with the existing technology, it has the following beneficial effects: the single-row cylindrical roller and single-claw cage structure reduces the processing difficulty of the cage, and the cage adopts a special structure, which is combined with the inner ring retainer The special relationship between the sides achieves the effect of axial and radial two-way positioning of the cage, and can run smoothly under high-speed rotation and impact loads. The inner ring adopts a single rib structure, which can not only provide axial and radial positioning of the cage, make the installation of the cage more convenient, but also increase the radial thickness of the cage and strengthen the strength of the cage. Increase the number of holes in the inner ring and the open structure of the single-rib inner ring plus retaining ring, which greatly increases the lubricating effect of the lubricant, and solves the problems of bearing inner diameter wear, bearing lockup, and short life. question.

Description of drawings

Fig. 1 is a structural diagram of a rolling mill work roll thrust bearing;

In the figure: 1. Bearing outer ring, 2. Inner ring, 3. Cage, 4. Rolling elements, 5. Flat retaining ring, 3.1. Catch section, 3.2. Connecting ring section.

Detailed ways

In order to gain an in-depth understanding of the structure of the rolling mill work roll thrust bearing, the description is as follows in conjunction with Figure 1: The rolling mill work roll thrust bearing is composed of bearing outer ring 1, inner ring 2, cage 3, rolling body 4 and flat retaining ring 5; rolling body 4 is a single-row cylindrical roller; the cage 3 is a single-claw cage structure; the inner ring 2 is a single rib inner ring, and the flat retaining ring 5 is set on the side of the inner ring 2 without ribs, forming an open structure. Several oil holes are arranged on the circumferential wall of the inner ring 2, and the oil holes are through holes. The cage 3 includes a grasping section 3.1 and a connecting ring section 3.2, and the connecting ring section 3.2 is arranged in a groove-shaped space surrounded by the bearing outer ring 1 and one side of the single rib.

According to the specific values such as the impact load and the working speed of the bearing, after analysis and calculation, an optimal technical solution is selected, the bearing structure is selected, and the most suitable main parameters are selected, including a thickened single-raceway outer ring and a single-rib inner ring. ring, a flat retaining ring, a single-jaw cage, and the diameter, length, and quantity of rolling elements. Among them, the rolling elements 4 are put into the bearing outer ring 1 and separated evenly, and then the cage 3 is put into the bearing outer ring 1, and the rolling elements 4 are evenly separated, and then put into the inner ring 2 from the same side, and finally put into the other side. The flat retaining ring 5 forms a complete set of bearings.

The structure of single-row cylindrical roller and single-jaw cage reduces the processing difficulty of the cage. The cage adopts a special structure and utilizes the special relationship between it and the rib of the inner ring to achieve axial and radial bidirectional directions of the cage. The effect of positioning, it can run smoothly under the action of high-speed rotation and impact load. The inner ring adopts a single rib structure, which can not only provide axial and radial positioning of the cage, make the installation of the cage more convenient, but also increase the radial thickness of the cage and strengthen the strength of the cage. Increase the number of holes in the inner ring and the open structure of the single-rib inner ring plus retaining ring, which greatly increases the lubricating effect of the lubricant, and solves the problems of bearing inner diameter wear, bearing lockup, and short life. question. High-speed Sendzimir rolling mill work roll thrust bearings not only meet the speed and load requirements well, but also significantly reduce problems such as outer ring fragmentation, inner diameter wear, bearing burnout, short life, and low precision.

Claims (3)

1. A rolling mill work roll thrust bearing, characterized in that it consists of bearing outer ring (1), inner ring (2), cage (3), rolling elements (4) and flat retaining ring (5); rolling elements (4) is a single-row cylindrical roller; the cage (3) is a single-jaw cage structure; the inner ring (2) is a single rib inner ring, and the flat retaining ring (5) is set on the inner ring side, forming an open structure. 2. A rolling mill work roll thrust bearing according to claim 1, characterized in that: several oil holes are arranged on the circumferential wall of the inner ring (2), and the oil holes are through holes. 3. A rolling mill work roll thrust bearing according to claim 1, characterized in that: the cage (3) includes a grasping section (3.1) and a connecting ring section (3.2), and the connecting ring section (3.2) is set In the groove-shaped space enclosed by the bearing outer ring (1) and one side of the single rib.