Combination bearing suitable for ultra-high-speed working condition

Abstract

The utility model relates to the field of bearings, and particularly discloses a combined bearing suitable for an ultra-high-speed working condition. The combined bearing comprises a first bearing pack, a second bearing pack and a transition ferrule, the first bearing pack comprises a first inner ring and a first outer ring, a rolling body is arranged between the first inner ring and the first outer ring, the second bearing pack comprises a second inner ring and a second outer ring, and a rolling body is arranged between the second inner ring and the second outer ring; the inner diameter of the first inner ring is larger than the outer diameter of the second outer ring, the first inner ring is arranged on the outer side of the second outer ring in a sleeving mode, and the transition sleeve ring is arranged between the first inner ring and the second outer ring and is in interference fit with the first inner ring and the second outer ring. On the basis that the combined bearing adapts to the working condition of ultrahigh rotating speed, the machining and assembling difficulty is greatly reduced, and the machining cost and the matching difficulty are also greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of bearings, specifically to a combined bearing suitable for ultra-high speed operating conditions. Background Technology

[0002] Ball bearings are a type of rolling bearing. Rolling bearings typically consist of an inner ring, an outer ring, and rolling elements. The rolling elements are positioned between the inner and outer rings and are restrained by a cage. Ball bearings are primarily used to bear radial loads, but can also withstand certain axial loads.

[0003] Ball bearings can operate at high speeds, but excessively high speeds still accelerate the wear of rolling elements and raceways, reducing their service life. For ultra-high speed applications, Chinese utility model patent CN 2153670Y discloses a multi-inner-ring bearing, consisting of an outer ring, inner ring, rolling elements, and a cage. One or more intermediate rings are also provided between the outer and inner rings, and rolling elements and a cage are installed between each ring. The main advantage of this multi-inner-ring bearing is its longer service life compared to conventional ball bearings. If one set of rolling elements fails, the other set can continue operating, reducing downtime for maintenance. Furthermore, because the inner and outer rings are connected by at least two sets of rolling elements, the relative speed between them during operation is gradually buffered by each set of rolling elements. The operating speed of each set of rolling elements is much lower than that of a single rolling element in a conventional bearing. This significantly improves the overall maximum speed that the bearing can handle without altering the mechanical properties of the rolling elements and raceways.

[0004] However, the above-mentioned bearings also have certain shortcomings. For example, they require the design of special fixtures and molds for machining the inner rings, which increases the machining difficulty and cost. Compared with conventional bearings, the machining and assembly difficulty of the above-mentioned multi-inner-ring bearings is greatly increased, which limits the large-scale use of the above-mentioned multi-inner-ring bearings. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a combined bearing suitable for ultra-high speed conditions. While adapting to ultra-high speed conditions, it greatly reduces the difficulty of processing and assembly, as well as the processing cost and selection difficulty.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A combined bearing suitable for ultra-high speed working conditions includes a first bearing assembly, a second bearing assembly and a transition ring. The first bearing assembly includes a first inner ring and a first outer ring, and a rolling element is provided between the first inner ring and the first outer ring. The second bearing assembly includes a second inner ring and a second outer ring, and a rolling element is provided between the second inner ring and the second outer ring.

[0007] The inner diameter of the first inner ring is larger than the outer diameter of the second outer ring. The first inner ring is fitted outside the second outer ring. The transition ring is positioned between the first inner ring and the second outer ring and is interference-fitted with both the first inner ring and the second outer ring.

[0008] The combined bearing of this application, through the inner and outer arrangement of the first bearing group and the second bearing group, can gradually buffer the relative operating speed between the first outer ring and the second inner ring, thereby reducing the rotational speed of the rolling elements in the first bearing group and the second bearing group, and thus improving the overall ultra-high speed adaptability of the combined bearing.

[0009] Compared to existing multi-inner-ring bearings, the first and second bearing assemblies can be machined and assembled separately, and can even be assembled with existing conventional bearings by setting appropriate transition rings. This significantly reduces machining and assembly difficulty and production costs. Furthermore, by using transition rings of different thicknesses, they can be matched with bearings of different sizes and specifications, making the configuration of the combined bearings flexible and adaptable to a wider range of applications.

[0010] Preferably, the rolling elements in both the first and second bearing groups are arranged in a single row.

[0011] Preferably, the rolling elements in both the first and second bearing assemblies are arranged in double rows.

[0012] Preferably, the operating range of the rolling elements in the first bearing assembly is aligned with the operating range of the rolling elements in the second bearing assembly.

[0013] This ensures that the radial loads of the first and second bearing groups are aligned, avoiding uneven loading, reducing the torque caused by uneven loading, and ensuring the overall stable operation of the combined bearings.

[0014] Preferably, both the first bearing assembly and the second bearing assembly are deep groove ball bearings.

[0015] Preferably, both the first bearing assembly and the second bearing assembly are angular contact ball bearings.

[0016] Preferably, the outer side of the transition ring is provided with a first retaining ring and the inner side is provided with a second retaining ring. The first and second retaining rings are offset in the axial direction, and the space between the first and second retaining rings is the installation interval. The first bearing assembly and the second bearing assembly are both located in the installation interval in the axial direction.

[0017] The first and second retaining rings can help bear axial loads and prevent axial displacement between the first inner ring, the transition retaining ring, and the second outer ring under axial loads, thus ensuring the normal and stable operation of the combined bearing under axial loads.

[0018] Preferably, one side of the groove on the first outer ring is a first low side, and the first low side is located on the side of the first outer ring facing the first retaining ring.

[0019] The second outer ring has a second low stop edge on one side of the groove, which is located on the side of the second outer ring away from the second stop ring. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the combined bearing applicable to ultra-high speed conditions according to the first embodiment of this utility model;

[0021] Figure 2 This is an exploded view of the combined bearing of the first embodiment of this utility model, applicable to ultra-high speed operating conditions;

[0022] Figure 3 This is a schematic diagram of the combined bearing structure of the second embodiment of the present invention, applicable to ultra-high speed operating conditions;

[0023] Figure 4 This is a schematic diagram of the structure of the combined bearing applicable to ultra-high speed conditions according to the third embodiment of this utility model;

[0024] Figure 5 This is an exploded view of the combined bearing of the third embodiment of this utility model, applicable to ultra-high speed conditions. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Example 1

[0026] like Figure 1 and Figure 2 As shown, a combined bearing suitable for ultra-high-speed operating conditions includes a first bearing assembly 1, a second bearing assembly 3, and a transition ring 2. The first bearing assembly 1 includes a first inner ring 12 and a first outer ring 11, with rolling elements 4 disposed between the first inner ring 12 and the first outer ring 11. The second bearing assembly 3 includes a second inner ring 32 and a second outer ring 31, with rolling elements 4 disposed between the second inner ring 32 and the second outer ring 31. Specifically, both the first bearing assembly 1 and the second bearing assembly 3 are deep groove ball bearings.

[0027] like Figure 1 and Figure 2As shown, the inner diameter of the first inner ring 12 is larger than the outer diameter of the second outer ring 31. The first inner ring 12 is fitted outside the second outer ring 31. The transition ring 2 is disposed between the first inner ring 12 and the second outer ring 31 and is interference-fitted with the first inner ring 12 and the second outer ring 31 respectively.

[0028] like Figure 1 and Figure 2 As shown, in one specific implementation, the rolling elements 4 in both the first bearing assembly 1 and the second bearing assembly 3 are arranged in a single row. The operating range of the rolling elements 4 in the first bearing assembly 1 is aligned internally and externally with the operating range of the rolling elements 4 in the second bearing assembly 3. That is, the grooves of the rolling elements 4 in the first bearing assembly 1 are aligned internally and externally with the grooves of the rolling elements 4 in the second bearing assembly 3. This ensures that the radial loads of the first bearing assembly 1 and the second bearing assembly 3 are aligned, avoiding uneven loading, reducing torque caused by uneven loading, and ensuring the overall stable operation of the combined bearing.

[0029] The combined bearing of this application, through the inner and outer arrangement of the first bearing group 1 and the second bearing group 3, can gradually buffer the relative operating speed between the first outer ring 11 and the second inner ring 32, thereby reducing the rotational speed of the rolling elements 4 in the first bearing group 1 and the second bearing group 3, and thus improving the overall ultra-high speed adaptability of the combined bearing.

[0030] Compared to existing multi-inner-ring bearings, the first bearing assembly 1 and the second bearing assembly 3 can be machined and assembled separately. They can even be assembled with existing conventional bearings by setting appropriate transition rings 2, significantly reducing machining and assembly difficulty and production costs. Furthermore, by using transition rings 2 of different thicknesses, they can be matched with bearings of different sizes and specifications, making the configuration of the combined bearings flexible and adaptable to a wider range of applications. Example 2

[0031] like Figure 3 As shown, compared with Embodiment 1, the difference in this embodiment is that the rolling elements 4 in the first bearing group 1 and the second bearing group 3 are arranged in double rows. Example 3

[0032] like Figure 4 and Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the first bearing group 1 and the second bearing group 3 are both angular contact ball bearings.

[0033] like Figure 4 and Figure 5As shown, the outer side of the transition ring 2 is provided with a first retaining ring 21, and the inner side is provided with a second retaining ring 22. The first retaining ring 21 and the second retaining ring 22 are offset in the axial direction. The space between the first retaining ring 21 and the second retaining ring 22 is the installation range. The first bearing assembly 1 and the second bearing assembly 3 are both located in the installation range in the axial direction.

[0034] like Figure 4 and Figure 5 As shown, specifically, one side of the groove on the first outer ring 11 is a first low side, which is located on the side of the first outer ring 11 facing the first retaining ring 21. One side of the groove on the second outer ring 31 is a second low side, which is located on the side of the second outer ring 31 away from the second retaining ring 22.

[0035] The first retaining ring 21 and the second retaining ring 22 can help bear the axial load and prevent axial displacement between the first inner ring 12, the transition retaining ring and the second outer ring 31 under the action of axial load, so as to ensure the normal and stable operation of the combined bearing under the action of axial load.

[0036] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined bearing suitable for ultra-high speed operating conditions, characterized in that: It includes a first bearing assembly, a second bearing assembly, and a transition ring. The first bearing assembly includes a first inner ring and a first outer ring, and a rolling element is provided between the first inner ring and the first outer ring. The second bearing assembly includes a second inner ring and a second outer ring, and a rolling element is provided between the second inner ring and the second outer ring. The inner diameter of the first inner ring is larger than the outer diameter of the second outer ring. The first inner ring is fitted outside the second outer ring. The transition ring is positioned between the first inner ring and the second outer ring and is interference-fitted with both the first inner ring and the second outer ring.

2. The combined bearing according to claim 1, characterized in that: The rolling elements in both the first and second bearing groups are arranged in a single row.

3. The combined bearing according to claim 1, characterized in that: The rolling elements in both the first and second bearing assemblies are arranged in double rows.

4. The combined bearing according to claim 2 or 3, characterized in that: The operating range of the rolling elements in the first bearing assembly is aligned with the operating range of the rolling elements in the second bearing assembly.

5. The combined bearing according to claim 1, characterized in that: Both the first bearing group and the second bearing group are deep groove ball bearings.

6. The combined bearing according to claim 1, characterized in that: Both the first bearing group and the second bearing group are angular contact ball bearings.

7. The combined bearing according to claim 6, characterized in that: The outer side of the transition ring is provided with a first retaining ring, and the inner side is provided with a second retaining ring. The first and second retaining rings are offset in the axial direction, and the space between the first and second retaining rings is the installation range. The first bearing assembly and the second bearing assembly are both located in the installation range in the axial direction.

8. The combined bearing according to claim 7, characterized in that: The first low stop is a side stop on one side of the groove on the first outer ring, and the first low stop is located on the side of the first outer ring facing the first stop ring; The second outer ring has a second low stop edge on one side of the groove, which is located on the side of the second outer ring away from the second stop ring.

Images