Thrust bearing of steel rolling mill

Abstract

The utility model provides a thrust bearing of a steel rolling mill. The thrust bearing comprises a middle shaft ring, a roller assembly, a first seat ring, a second seat ring and a middle space ring, the center shaft ring is composed of an inner ring part and an outer ring part. The outer ring part is arranged in the middle of the outer circumferential surface of the inner ring part; a middle space ring is arranged on the outer side of the outer ring part; the two end faces of the middle space ring make contact with the first seat ring and the second seat ring respectively. The number of the roller assemblies is two. The first roller assembly is arranged between the outer ring part and the first seat ring; and the second roller assembly is arranged between the outer ring part and the second seat ring. According to the thrust bearing of the steel rolling mill, a traditional loose rib structure is abandoned, the thrust bearing is of an integrated structure, machining and installation are convenient, the middle shaft ring is in interference fit with the shaft, the situation that the loose rib sinks to rub the shaft is avoided, the use condition is greatly improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and particularly relates to a thrust bearing for a steel rolling mill. Background Art

[0002] The main function of a steel thrust bearing is to bear unidirectional or bidirectional axial loads, that is, the force perpendicular to the axis of the bearing. It plays a crucial role in the field of steel rolling mills.

[0003] A structure of a thrust bearing for a steel rolling mill is applied to the thrust of the finishing support roll of a hot-rolled narrow strip. The installation of a traditional structure of a thrust bearing for a steel rolling mill is difficult. The inner diameter dimension of the flat retaining ring and the shaft are in clearance fit. During use, it will sink and rub against the shaft, seriously affecting the use and reducing the service life of the bearing. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a thrust bearing for a steel rolling mill. The thrust bearing for a steel rolling mill includes a middle shaft ring, a roller assembly, a first seat ring, a second seat ring and a middle spacer ring; the middle shaft ring is composed of an inner ring part and an outer ring part; an outer ring part is arranged in the middle of the outer circumferential surface of the inner ring part; a middle spacer ring is arranged on the outer side of the outer ring part; both end faces of the middle spacer ring are in contact with the first seat ring and the second seat ring respectively; there are two roller assemblies; the first roller assembly is arranged between the outer ring part and the first seat ring; the second roller assembly is arranged between the outer ring part and the second seat ring.

[0005] Further, the roller assembly is composed of a cage cover, a cage seat and rolling elements; the rolling elements are arranged in the cage seat; the cage seat is fixedly connected with the cage cover.

[0006] Further, the fixed connection is that threaded holes are arranged on the cage seat and the cage cover; the threaded holes are matched with screws.

[0007] Further, there are two rolling elements arranged in the cage seat.

[0008] Further, the rolling elements are cylindrical rollers.

[0009] Further, an oil storage groove is arranged at the connecting corner of the inner ring part and the outer ring part.

[0010] Further, the middle spacer ring is composed of a circular ring part and a convex platform part; a convex platform part is arranged in the middle of the inner circumferential surface of the circular ring part.

[0011] Further, a grease injection hole penetrating through the middle spacer ring is arranged at the middle position of the middle spacer ring.

[0012] Furthermore, the grease injection hole consists of a body part and an outwardly expanding part. The contour of the body part is cylindrical; the contour of the outwardly expanding part is frustum-shaped; the outwardly expanding part is arranged close to the outer peripheral surface of the middle spacer ring.

[0013] The assembly method of a thrust bearing for a steel rolling mill is characterized in that:

[0014] Step 1: Install the first raceway ring; first, fit the first raceway ring into the bearing housing.

[0015] Step 2: Assemble the first roller assembly; fit the rolling elements into the cage seat, then install the cage cover, and fasten the cage seat and the cage cover with screws to complete the installation of the roller assembly.

[0016] Step 3: Install the first roller assembly; also fit the first roller assembly onto the shaft and make it contact with the first raceway ring.

[0017] Step 4: Install the middle spacer ring; fit the middle spacer ring onto the shaft and install it outside the first roller assembly to make it contact with the first raceway ring.

[0018] Step 5: Install the middle shaft ring; heat the middle shaft ring and fit it onto the shaft to make it contact with the first roller assembly.

[0019] Step 6: Repeat the above Step 2; assemble the second roller assembly.

[0020] Step 7: Install the second roller assembly; pass the second roller assembly through the shaft and fit it onto the middle shaft ring to make it contact with the middle shaft ring.

[0021] Step 8: Install the second raceway ring; pass the second raceway ring through the shaft and fit it onto the middle shaft ring to make it contact with the second roller assembly.

[0022] Step 9: Complete the assembly.

[0023] The advantages of the present utility model are as follows: A thrust bearing for a steel rolling mill of the present utility model abandons the traditional flat retaining ring structure and adopts an integral structure, which is convenient for processing and installation. The middle shaft ring and the shaft are in interference fit, and the situation of the flat retaining ring sinking and rubbing against the shaft will not occur, greatly improving the service condition and extending the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is a schematic structural diagram of the middle shaft ring of the present utility model;

[0026] Figure 3 is a schematic structural diagram of the middle spacer ring of the present utility model;

[0027] In the figure: 1. Central axis ring; 2. Roller assembly; 3. First seat ring; 4. Second seat ring; 5. Middle spacer ring; 6. Inner ring part; 7. Outer ring part; 8. Cage cover; 9. Cage seat; 10. Rolling element; 11. Screw; 12. Oil storage groove; 13. Ring part; 14. Boss part; 15. Grease injection hole. Detailed implementation mode

[0028] The following combines the accompanying drawings and embodiments to elaborate on the present utility model:

[0029] Refer to the attached Figures 1-3 As shown, the present utility model provides a thrust bearing for a steel rolling mill, including a central axis ring 1, a roller assembly 2, a first seat ring 3, a second seat ring 4, and a middle spacer ring 5; the central axis ring 1 is composed of an inner ring part 6 and an outer ring part 7; an outer ring part 7 is arranged in the middle of the outer circumferential surface of the inner ring part 6; a middle spacer ring 5 is arranged on the outside of the outer ring part 7; both end faces of the middle spacer ring 5 are in contact with the first seat ring 3 and the second seat ring 4 respectively; there are two roller assemblies 2; the first roller assembly 2 is arranged between the outer ring part 7 and the first seat ring 3; the second roller assembly 2 is arranged between the outer ring part 7 and the second seat ring 4.

[0030] Furthermore, the roller assembly 2 is composed of a cage cover 8, a cage seat 9, and a rolling element 10; the rolling element 10 is arranged in the cage seat 9; the cage seat 9 is fixedly connected with the cage cover 8.

[0031] Furthermore, the fixed connection is that threaded holes are arranged on the cage seat 9 and the cage cover 8; the threaded holes are matched with the screws 11.

[0032] Furthermore, there are two rolling elements 10 arranged in the cage seat 9.

[0033] Furthermore, the rolling element 10 is a cylindrical roller.

[0034] Furthermore, an oil storage groove 12 is arranged at the connecting corner of the inner ring part 6 and the outer ring part 7.

[0035] Furthermore, the middle spacer ring 5 is composed of a ring part 13 and a boss part 14; a boss part 14 is arranged in the middle of the inner circumferential surface of the ring part 13.

[0036] It should be noted that a boss part 14 is arranged in the middle of the middle spacer ring 5, and both sides are concave to prevent the roller assembly 2 from knocking against the cage during operation and improve the service life of the roller assembly 2.

[0037] Furthermore, a grease injection hole 15 penetrating the middle spacer ring 5 is arranged at the middle position of the middle spacer ring 5.

[0038] It should be noted that the grease injection hole 15 is for regularly injecting grease into the bearing to keep the bearing operating well and improve the lubricity of the bearing.

[0039] Furthermore, the grease injection hole 15 consists of a body part and an outward-expanding part. The contour of the body part is cylindrical; the contour of the outward-expanding part is frustum-shaped; the outward-expanding part is arranged close to the outer peripheral surface of the middle spacer ring 5.

[0040] It should be noted that the outward-expanding part of the grease injection hole 15 is for more convenient grease injection and is not prone to liquid leakage.

[0041] Adopting the assembly method of the thrust bearing of the steel rolling mill, it is characterized in that:

[0042] Step 1: Install the first race 3; first, slip the first race 3 onto the bearing housing.

[0043] Step 2: Assemble the first roller assembly 2; slip the rolling elements 10 into the cage holder 9, then install the cage cover 8, and fasten the cage holder 9 and the cage cover 8 with screws 11 to complete the installation of the roller assembly 2.

[0044] Step 3: Install the first roller assembly 2; also slip the first roller assembly 2 onto the shaft and make it contact with the first race 3.

[0045] Step 4: Install the middle spacer ring 5; slip the middle spacer ring 5 onto the shaft and install it outside the first roller assembly 2, making it contact with the first race 3.

[0046] Step 5: Install the middle shaft ring 1; heat the middle shaft ring 1 and slip it onto the shaft, making it contact with the first roller assembly 2.

[0047] Step 6: Repeat the above Step 2; assemble the second roller assembly 2.

[0048] Step 7: Install the second roller assembly 2; pass the second roller assembly 2 through the shaft and slip it onto the middle shaft ring 1, making it contact with the middle shaft ring 1.

[0049] Step 8: Install the second race 4; pass the second race 4 through the shaft and slip it onto the middle shaft ring 1, making it contact with the second roller assembly 2.

[0050] Step 9: Complete the assembly.

[0051] It should be noted that there is a housing outside the bearing. After installing the roller assembly, the middle spacer ring needs to be installed. The housing restricts the middle spacer ring, and the middle spacer ring restricts the roller assembly to prevent the roller assembly from falling off when the middle shaft ring has not been installed, which will affect the installation of the middle shaft ring; after installing the roller assembly, it will move downward due to gravity. After installing the middle spacer ring, the amount of movement will not be large, making the installation more convenient.

[0052] The thrust bearing adopts a special structure. By utilizing the special relationship between the middle ring and the seat ring, the effect of two-way axial and radial positioning of the bearing is achieved, and it can operate smoothly under high-speed rotation and impact loads. The middle ring adopts an integral structure, which can not only provide axial and radial positioning for the bearing, making the bearing installation more convenient and efficient, but also improve the service life of the bearing and strengthen the strength of the bearing.

Claims

1. Thrust bearing for steel rolling mill, characterized in that: It includes a central axis ring, a roller assembly, a first seat ring, a second seat ring and a middle spacer ring; the central axis ring is composed of an inner ring part and an outer ring part; an outer ring part is arranged in the middle of the outer circumferential surface of the inner ring part; a middle spacer ring is arranged outside the outer ring part; both end faces of the middle spacer ring are in contact with the first seat ring and the second seat ring respectively; there are two roller assemblies; the first roller assembly is arranged between the outer ring part and the first seat ring; the second roller assembly is arranged between the outer ring part and the second seat ring.

2. The thrust bearing of the steel rolling mill according to claim 1, wherein: The roller assembly is composed of a cage cover, a cage seat and rolling elements; the rolling elements are arranged in the cage seat; the cage seat is fixedly connected with the cage cover.

3. The thrust bearing of a steel rolling mill according to claim 2, characterized in that: The fixed connection is that threaded holes are arranged on the cage seat and the cage cover; the threaded holes are matched with screws.

4. The thrust bearing of a steel rolling mill according to claim 2, wherein: There are two rolling elements arranged in the cage seat.

5. The thrust bearing of a steel rolling mill according to claim 3, wherein: The rolling elements are cylindrical rollers.

6. The thrust bearing of a steel rolling mill according to claim 1, characterized in that: An oil storage groove is arranged at the connecting corner of the inner ring part and the outer ring part.

7. The thrust bearing of a steel rolling mill according to any one of claims 1-6, characterized in that: The middle spacer ring is composed of a circular ring part and a boss part; a boss part is arranged in the middle of the inner circumferential surface of the circular ring part.

8. The thrust bearing for a steel rolling mill according to claim 7, wherein: A grease injection hole penetrating through the middle spacer ring is arranged at the middle position of the middle spacer ring.

9. The thrust bearing of a steel rolling mill according to claim 8, characterized in that: The grease injection hole consists of a body part and an outward expanding part, the contour of the body part is cylindrical; the contour of the outward expanding part is frustum-shaped; the outward expanding part is arranged close to the outer peripheral surface of the middle spacer ring.

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