Bearing structure

Abstract

The invention relates to the technical field of bearings, in particular to a bearing structure which comprises an annular outer layer, an annular middle layer and an annular inner layer, and the annular outer layer, the annular middle layer and the annular inner layer are coaxially arranged from outside to inside; a plurality of storage cavities are formed in the annular middle layer in the circumferential direction at intervals, solid lubricants are arranged in the storage cavities, lubricating channels are formed in the storage cavities, and the outlet ends of the lubricating channels are located on the inner surface of the annular inner layer. According to the bearing structure provided by the invention, during operation, due to centrifugal force or capillary action, the lubricant in the storage cavity can reach the inner surface of the annular inner layer along the outlet end of the lubricating channel, so that a lubricating film is formed between the rotating shaft and the inner surface of the annular inner layer, friction and abrasion are reduced, and meanwhile, the service life of the bearing structure is prolonged. Evaporation and flowing of the lubricating film can take away heat generated by friction, the cooling effect is achieved, self-lubricating and cooling of the bearing structure under the extreme working conditions of high speed, heavy load and the like can be achieved, the reliability is remarkably improved, and the service life is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a bearing structure. Background Art

[0002] In the prior art, the working environment of some bearings is usually relatively harsh. For example, they need to bear huge loads and high-frequency, intense vibrations. Therefore, such bearings must meet special performance requirements during design and selection.

[0003] However, existing bearings are prone to lubrication failure due to heat generated by friction under extreme working conditions such as high speed and heavy load, which in turn leads to bearing failure. Summary of the Invention

[0004] The present invention provides a bearing structure to solve the defect that existing bearings are prone to lubrication failure due to heat generated by friction under extreme working conditions such as high speed and heavy load, which in turn leads to bearing failure.

[0005] The present invention provides a bearing structure, including: an annular outer layer, an annular intermediate layer, and an annular inner layer. The annular outer layer, the annular intermediate layer, and the annular inner layer are coaxially arranged from outside to inside.

[0006] A plurality of storage cavities are circumferentially and spacedly arranged inside the annular intermediate layer. Solid lubricant is provided in the storage cavities. A lubrication channel is provided on the storage cavity, and the outlet end of the lubrication channel is located on the inner surface of the annular inner layer.

[0007] According to the bearing structure provided by the present invention, a plurality of the storage cavities are evenly and circumferentially spacedly arranged inside the annular intermediate layer.

[0008] According to the bearing structure provided by the present invention, adjacent storage cavities communicate with each other.

[0009] According to the bearing structure provided by the present invention, the annular intermediate layer includes a first cured layer, a shock-absorbing layer, and a second cured layer coaxially arranged from outside to inside. The storage cavity is located in the shock-absorbing layer. The shock-absorbing layer is fixedly connected to the annular outer layer through the first cured layer, and the shock-absorbing layer is fixedly connected to the annular inner layer through the second cured layer.

[0010] According to the bearing structure provided by the present invention, both the inner and outer surfaces of the shock-absorbing layer are wavy surfaces extending in the circumferential direction. The surface shape of the first cured layer facing the shock-absorbing layer side is adapted to the outer surface shape of the shock-absorbing layer, and the surface shape of the second cured layer facing the shock-absorbing layer side is adapted to the inner surface shape of the shock-absorbing layer.

[0011] According to the bearing structure provided by the present invention, the peaks on the outer surface of the shock-absorbing layer are arranged opposite to the peaks on the inner surface of the shock-absorbing layer, the troughs on the outer surface of the shock-absorbing layer are arranged opposite to the troughs on the inner surface of the shock-absorbing layer, and the storage cavity is located between the peaks on the outer and inner surfaces of the shock-absorbing layer.

[0012] According to the bearing structure provided by the present invention, the diameter of the lubrication channel is 0.25 mm to 0.75 mm.

[0013] According to the bearing structure provided by the present invention, the solid lubricant is graphite or molybdenum disulfide.

[0014] According to the bearing structure provided by the present invention, the annular outer layer comprises an auxetic honeycomb skeleton, and the auxetic honeycomb skeleton is filled with flexible energy-absorbing particles.

[0015] According to the bearing structure provided by the present invention, the annular inner layer is a non-metallic water lubrication layer.

[0016] The bearing structure provided by the present invention has an annular middle layer provided between an annular outer layer and an annular inner layer, and a plurality of storage cavities are provided in the annular middle layer at circumferential intervals. When the bearing structure is in operation, due to centrifugal force or capillary action, the lubricant in the storage cavity can reach the inner surface of the annular inner layer along the outlet end of the lubrication channel, thereby forming a lubricating film between the rotating shaft and the inner surface of the annular inner layer, reducing friction and wear. At the same time, the evaporation and flow of the lubricating film can take away the heat generated by friction, playing a cooling role, and can achieve self-lubrication and cooling of the bearing structure under extreme working conditions such as high speed and heavy load, thereby significantly improving reliability and service life.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional schematic diagram of a bearing structure provided by an embodiment of the present invention.

[0020] Figure 2 It is a partially enlarged schematic diagram of an annular intermediate layer in a bearing structure provided by an embodiment of the present invention.

[0021] Reference numerals: 100, annular outer layer; 110, auxetic honeycomb skeleton; 120, flexible energy-absorbing particles; 200, annular intermediate layer; 210, first curing layer; 220, shock-absorbing layer; 221, storage cavity; 222, lubrication channel; 223, wavy surface; 224, connecting channel; 230, second curing layer; 300, annular inner layer. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0026] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0027] The following combines Figure 1 and Figure 2 to describe the bearing structure provided by the present invention.

[0028] It should be noted that the bearing structure provided by the present invention can be applied not only to the support bearings of the propulsion systems of underwater vehicles such as ships, but also to technical fields such as aerospace, high-speed trains, wind power generation, and precision machine tools. Among them, when applied to the aerospace field, it can be used for aeroengines, spacecraft attitude control mechanisms, etc.; when applied to the high-speed train field, it can be used for train bearings, traction motor bearings, etc.; when applied to the wind power generation field, it can be used for wind turbine main shaft bearings, gearbox bearings, etc.; when applied to the precision machine tool field, it can be used for high-speed spindle bearings, feed system bearings, etc.

[0029] Refer to Figure 1 and Figure 2 As shown, the bearing structure provided by the embodiment of the present invention includes: an annular outer layer 100, an annular intermediate layer 200, and an annular inner layer 300. The annular outer layer 100, the annular intermediate layer 200, and the annular inner layer 300 are coaxially arranged from outside to inside.

[0030] A plurality of storage cavities 221 are circumferentially spaced along the inner side of the annular intermediate layer 200. Solid lubricant is provided in the storage cavities 221. A lubrication channel 222 is provided on the storage cavity 221. The outlet end of the lubrication channel 222 is located on the inner surface of the annular inner layer 300.

[0031] The bearing structure provided by the present invention, by arranging an annular intermediate layer 200 between an annular outer layer 100 and an annular inner layer 300, and arranging a plurality of storage cavities 221 at circumferential intervals in the annular intermediate layer 200, when the bearing structure is in operation, due to centrifugal force or capillary action, the lubricant in the storage cavity 221 can reach the inner surface of the annular inner layer 300 along the outlet end of the lubrication channel 222, thereby forming a lubricating film between the rotating shaft and the inner surface of the annular inner layer 300, reducing friction and wear, and at the same time, the evaporation and flow of the lubricating film can take away the heat generated by friction, playing a cooling role, and can achieve self-lubrication and cooling of the bearing structure under extreme working conditions such as high speed and heavy load, thereby significantly improving reliability and service life.

[0032] Specifically, the bearing structure includes an annular outer layer 100, an annular middle layer 200 and an annular inner layer 300. The annular outer layer 100 is located at the outermost layer of the bearing structure, is made of high-strength material, has a smooth surface, and is used to absorb and disperse external impact force; the annular inner layer 300 is located at the innermost layer of the bearing structure, and is sleeved on the rotating shaft when in use, and is used to provide rotation support for the rotating shaft; the annular middle layer 200 is located between the annular outer layer 100 and the annular inner layer 300, and a plurality of storage cavities 221 are arranged at intervals along the circumferential direction, and solid lubricants are arranged in the storage cavities 221. During the operation of the bearing structure, the lubricant can reach the inner surface of the annular inner layer 300 through the outlet end of the lubrication channel 222 under centrifugal force or capillary action, and form a lubricating film between the rotating shaft and the inner surface of the annular inner layer 300 to reduce friction and wear.

[0033] It should be noted that when abnormal friction occurs in the bearing structure, causing the internal temperature to rise, the bearing shell and other structures in the bearing expand and deform due to the heat. The lubricant in the storage cavity 221 can be squeezed out through the structural deformation and flow along the lubrication channel 222 to reach the bearing shell surface that needs lubrication (the inner surface of the annular inner layer 300).

[0034] At least one lubrication channel 222 is provided for each storage cavity 221, and the number of lubrication channels 222 provided for each storage cavity 221 can be single or multiple. When the number of lubrication channels 222 is single, the lubrication channel 222 is connected to the corresponding storage cavity 221; when the number of lubrication channels 222 is multiple, the multiple lubrication channels 222 are all connected to the corresponding storage cavity 221, and the multiple lubrication channels 222 can be arranged in a specific manner according to actual needs, for example, the multiple lubrication channels 222 are arranged in a circumferentially spaced manner to form a lubrication channel 222 group, or the multiple lubrication channels 222 are arranged in an axially spaced manner to form a lubrication channel 222 group, or the multiple lubrication channels 222 are arranged in a rectangular array or a circumferential array to form a lubrication channel 222 group.

[0035] The multiple storage cavities 221 can be arranged circumferentially in a uniform or non-uniform manner. When the multiple storage cavities 221 are arranged circumferentially in a uniform manner, the intervals between the multiple storage cavities 221 can be the same, so as to form a circumferentially uniformly distributed arrangement with a single storage cavity 221 as a storage cavity group; or the multiple storage cavities 221 can be arranged in a certain arrangement to form a storage cavity group, and multiple storage cavity groups are arranged at uniform intervals circumferentially within the annular intermediate layer 200. For example, four storage cavity groups are arranged at uniform intervals circumferentially within the annular intermediate layer 200, and each storage cavity group includes multiple storage cavities 221 arranged in a certain arrangement.

[0036] The multiple storage cavities 221 can be independent of each other, or some of the storage cavities 221 can be interconnected, or all of the storage cavities 221 can be interconnected. When the multiple storage cavities 221 are independent of each other, the storage cavities 221 are not interconnected, and the solid lubricants in each storage cavity 221 cannot flow between the storage cavities 221; when some of the storage cavities 221 are interconnected, for example, taking the multiple storage cavities 221 as a storage cavity group, the storage cavities 221 within the storage cavity group are interconnected, that is, the solid lubricants in the storage cavity group can flow between the individual storage cavities 221, while the storage cavities 221 between different storage cavity groups are not interconnected; when all of the storage cavities 221 are interconnected, the solid lubricants in all of the storage cavities 221 can flow between the storage cavities 221.

[0037] The size (volume) of the storage cavity 221 can be set according to actual requirements. For example, the size of the storage cavity 221 can be set according to the thickness of the annular intermediate layer 200, so as to enable the storage cavity 221 to store more solid lubricants on the premise of ensuring structural stability and processing simplicity, and meet the long-term operation requirements of the bearing structure.

[0038] See Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, a plurality of storage cavities 221 are arranged at uniform intervals circumferentially within the annular intermediate layer 200.

[0039] By arranging a plurality of storage cavities 221 at uniform intervals circumferentially within the annular intermediate layer 200, during the operation of the bearing structure, each storage cavity 221 can evenly export the lubricant to different positions on the inner surface of the annular inner layer 300, thereby improving the uniformity of the lubricating film formed between the rotating shaft and the inner surface of the annular inner layer 300.

[0040] See Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, adjacent storage cavities 221 are interconnected.

[0041] By setting adjacent storage cavities 221 to be interconnected, the solid lubricants in all the storage cavities 221 can flow among the storage cavities 221. The flow of the solid lubricant between different storage cavities 221 can be balanced, avoiding excessive or insufficient lubricant in a certain cavity, which helps to maintain the amount of lubricant in each storage cavity 221 within the same or a relatively small fluctuating range, thereby ensuring the stability and continuity of the lubrication effect, improving the lubrication efficiency of the bearing and reducing wear.

[0042] Specifically, in this embodiment, a connection channel 224 is provided between adjacent storage cavities 221, and adjacent storage cavities 221 are interconnected through the corresponding connection channel 224. When the bearing structure operates at high speed, the solid lubricant in the storage cavity 221 can flow between adjacent storage cavities 221 through the connection channel 224 under the action of centrifugal force, ensuring that the solid lubricants in all the storage cavities 221 are always in a balanced state.

[0043] See Figure 1 and Figure 2 As shown in

[0044] According to some embodiments of the present invention, the annular intermediate layer 200 includes a first cured layer 210, a shock-absorbing layer 220, and a second cured layer 230 that are coaxially arranged from outside to inside. The storage cavity 221 is located in the shock-absorbing layer 220. The shock-absorbing layer 220 is fixedly connected to the annular outer layer 100 through the first cured layer 210, and the shock-absorbing layer 220 is fixedly connected to the annular inner layer 300 through the second cured layer 230.

[0045] By setting the annular intermediate layer 200 in the form of a first cured layer 210, a shock-absorbing layer 220, and a second cured layer 230 that are coaxially arranged from outside to inside, the first cured layer 210 can fixedly connect the shock-absorbing layer 220 to the annular outer layer 100, and the second cured layer 230 can fixedly connect the shock-absorbing layer 220 to the annular inner layer 300, thereby stably fixing the shock-absorbing layer 220 between the annular outer layer 100 and the annular inner layer 300.

[0046] Specifically, the first cured layer 210 is coated or pressed on the outer surface of the shock-absorbing layer 220 and contacts the annular outer layer 100, and is hardened under high temperature or high pressure conditions to form a firm connection. Similarly, the second cured layer 230 is coated or pressed on the inner surface of the shock-absorbing layer 220 and contacts the annular inner layer 300, and is cured by heating or applying pressure to ensure a tight bond with the inner layer.

[0047] See Figure 2As shown, according to some embodiments of the present invention, both the inner and outer surfaces of the shock-absorbing layer 220 are wavy surfaces 223 extending circumferentially. The surface shape of the first curing layer 210 facing the shock-absorbing layer 220 is adapted to the outer surface shape of the shock-absorbing layer 220, and the surface shape of the second curing layer 230 facing the shock-absorbing layer 220 is adapted to the inner surface shape of the shock-absorbing layer 220.

[0048] By setting both the inner and outer surfaces of the shock-absorbing layer 220 as wavy surfaces 223, and setting the surfaces of the first curing layer 210 and the second curing layer 230 facing the shock-absorbing layer 220 to be adapted to the corresponding side surface shapes of the shock-absorbing layer 220, when abnormal friction occurs in the bearing structure, resulting in an increase in internal temperature and the thermal expansion and deformation of structures such as the bearing inner bearing bush, the wavy structure can enhance the extrusion effect of the first curing layer 210 and the second curing layer 230 on the shock-absorbing layer 220, enabling the solid lubricant in the storage cavity 221 to be smoothly extruded; at the same time, the wavy structure can also be used to increase the contact area and improve the curing connection strength between the shock-absorbing layer 220 and the annular outer ring and the annular inner ring.

[0049] See Figure 2 As shown, according to some embodiments of the present invention, the wave crests of the outer surface of the shock-absorbing layer 220 are arranged opposite to the wave crests of the inner surface of the shock-absorbing layer 220, and the wave troughs of the outer surface of the shock-absorbing layer 220 are arranged opposite to the wave troughs of the inner surface of the shock-absorbing layer 220. The storage cavity 221 is located between the wave crests of the outer surface and the inner surface of the shock-absorbing layer 220.

[0050] By arranging the storage cavity 221 between the wave crests of the outer surface and the inner surface of the shock-absorbing layer 220, while optimizing the extrusion effect of the first curing layer 210 and the second curing layer 230 on the shock-absorbing layer 220, a larger layout space can be reserved for the storage cavity 221, enabling the storage cavity 221 to store more solid lubricant.

[0051] According to some embodiments of the present invention, the diameter of the lubrication channel 222 is 0.25 mm to 0.75 mm.

[0052] By setting the diameter of the lubrication channel 222 to be 0.25 mm to 0.75 mm, it can be ensured that the solid lubricant in the storage cavity 221 of the bearing structure will not ooze out through the lubrication channel 222 in the non-working state, and at the same time, it can be ensured that the solid lubricant in the storage cavity 221 of the bearing structure can ooze out smoothly through the lubrication channel 222 in the working state.

[0053] Specifically, the diameter of the lubrication channel 222 can be set to 0.25 mm, 0.5 mm or 0.75 mm, etc.

[0054] According to some embodiments of the present invention, the solid lubricant is graphite or molybdenum disulfide.

[0055] By selecting graphite or molybdenum disulfide as solid lubricants, when the bearing structure is working, the graphite or molybdenum disulfide in the storage cavity 221 can smoothly seep out through the lubrication channel 222 to form a lubricating film between the inner surface of the annular inner layer 300 and the rotating shaft, thereby reducing the friction and wear between the annular inner layer 300 and the rotating shaft.

[0056] See also Figure 1 As shown, according to some embodiments of the present invention, the annular outer layer 100 includes a auxetic honeycomb skeleton 110 , and the auxetic honeycomb skeleton 110 is filled with flexible energy-absorbing particles 120 .

[0057] By configuring the annular outer layer 100 to be a combination of a tensile honeycomb skeleton 110 and flexible energy-absorbing particles 120, the annular outer layer 100 can absorb and disperse external impact forces. Meanwhile, the flexible energy-absorbing particles 120 can compensate for the displacement of the annular outer layer 100 in all directions and significantly improve the energy absorption effect.

[0058] Specifically, the auxetic honeycomb skeleton 110 is made of high-strength composite materials, such as carbon fiber, glass fiber, etc. The flexible energy-absorbing particles 120 are made of high-damping materials such as rubber.

[0059] According to some embodiments of the present invention, the annular inner layer 300 is a non-metallic water lubricating layer.

[0060] The annular inner layer 300 is made of a non-metallic water lubricating layer, which can provide a stable supporting effect and has strong wear resistance when it is in direct contact with the rotating shaft.

[0061] Specifically, the non-metallic water lubrication layer can adopt bearing materials such as PA (polyamide) or PEEK (polyetheretherketone).

[0062] It can be seen from the description of the above embodiments that the bearing structure provided by the present invention has at least the following advantages.

[0063] The bearing structure provided by the present invention, by arranging an annular intermediate layer 200 between an annular outer layer 100 and an annular inner layer 300, and arranging a plurality of storage cavities 221 at circumferential intervals in the annular intermediate layer 200, when the bearing structure is in operation, due to centrifugal force or capillary action, the lubricant in the storage cavity 221 can reach the inner surface of the annular inner layer 300 along the outlet end of the lubrication channel 222, thereby forming a lubricating film between the rotating shaft and the inner surface of the annular inner layer 300, reducing friction and wear, and at the same time, the evaporation and flow of the lubricating film can take away the heat generated by friction, playing a cooling role, and can achieve self-lubrication and cooling of the bearing structure under extreme working conditions such as high speed and heavy load, thereby significantly improving reliability and service life.

[0064] The bearing structure provided by the present invention has wavy surfaces 223 on both the inner and outer surfaces of the shock-absorbing layer 220, and the surfaces of the first curing layer 210 and the second curing layer 230 facing the shock-absorbing layer 220 are set to be adapted to the shapes of the corresponding surfaces of the shock-absorbing layer 220. When abnormal friction occurs in the bearing structure, resulting in an increase in the internal temperature and the thermal expansion and deformation of structures such as the inner bearing bush, the wavy structure can enhance the extrusion effect of the first curing layer 210 and the second curing layer 230 on the shock-absorbing layer 220, enabling the solid lubricant in the storage cavity 221 to be smoothly extruded; at the same time, the wavy structure can also increase the contact area and enhance the curing connection strength between the shock-absorbing layer 220 and the annular outer ring and the annular inner ring.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bearing structure, characterized in that: include: An annular outer layer, an annular middle layer and an annular inner layer, wherein the annular outer layer, the annular middle layer and the annular inner layer are coaxially arranged from outside to inside; A plurality of storage cavities are arranged in the annular middle layer at intervals along the circumferential direction. Solid lubricants are arranged in the storage cavities. Lubricating channels are arranged on the storage cavities. The outlet ends of the lubricating channels are located on the inner surface of the annular inner layer.

2. The bearing structure according to claim 1, characterized in that: A plurality of storage cavities are evenly spaced in the circumferential direction in the annular intermediate layer.

3. The bearing structure according to claim 2, characterized in that: Adjacent storage chambers are communicated with each other.

4. The bearing structure according to claim 1, characterized in that: The annular middle layer includes a first solidified layer, a shock-absorbing layer, and a second solidified layer coaxially arranged from outside to inside, the storage cavity is located in the shock-absorbing layer, the shock-absorbing layer is solidified and connected to the annular outer layer through the first solidified layer, and the shock-absorbing layer is solidified and connected to the annular inner layer through the second solidified layer.

5. The bearing structure according to claim 4, characterized in that: The inner and outer surfaces of the shock-absorbing layer are both wavy surfaces extending along the circumferential direction. The surface shape of the first solidified layer facing the shock-absorbing layer matches the outer surface shape of the shock-absorbing layer. The surface shape of the second solidified layer facing the shock-absorbing layer matches the inner surface shape of the shock-absorbing layer.

6. The bearing structure according to claim 5, characterized in that: The wave crests on the outer surface of the shock-absorbing layer are arranged opposite to the wave crests on the inner surface of the shock-absorbing layer, the wave troughs on the outer surface of the shock-absorbing layer are arranged opposite to the wave troughs on the inner surface of the shock-absorbing layer, and the storage cavity is located between the wave crests on the outer and inner surfaces of the shock-absorbing layer.

7. The bearing structure according to any one of claims 1 to 6, characterized in that: The diameter of the lubrication channel is 0.25 mm to 0.75 mm.

8. The bearing structure according to any one of claims 1 to 6, characterized in that: The solid lubricant is graphite or molybdenum disulfide.

9. The bearing structure according to any one of claims 1 to 6, characterized in that: The annular outer layer comprises a auxetic honeycomb framework, and the auxetic honeycomb framework is filled with flexible energy-absorbing particles.

10. The bearing structure according to any one of claims 1 to 6, characterized in that: The annular inner layer is a non-metallic water lubricating layer.

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