High-speed heavy-load roller bearing

Abstract

The invention discloses a high-speed heavy-load roller bearing which comprises a bearing ring, a retainer arranged on the inner side of the bearing ring and a rolling body arranged on the inner side of the retainer, and the bearing ring comprises a bearing inner ring and a bearing outer ring arranged on the radial outer side of the bearing inner ring; the rolling body is arranged between the bearing inner ring and the bearing outer ring in a rolling manner; the retainer comprises a retainer seat and a retainer beam arranged in the middle of the retainer seat; oil grooves are formed in the retainer seat and the retainer beam and are used for forming a uniform and stable oil film, so that the change of clearance caused by the change of the internal structure of the bearing is reduced; the arc-shaped first oil groove and the two groups of fishbone-shaped second oil grooves are matched for use, so that lubricating oil can form a layer of stable and uniform oil film in the bearing, and the oil film serves as a buffer layer between a rolling body and a raceway, so that the direct contact between metal parts is effectively reduced, and the service life of the bearing is prolonged. Therefore, the friction coefficient and the wear degree are greatly reduced.

Description

Technical Field

[0001] The invention relates to a roller bearing, in particular to a high-speed and heavy-load roller bearing. Background Art

[0002] There are many types of bearings, which are mainly divided into spherical plain bearings, bearing seats and linear bearings according to the mode of movement. Spherical plain bearings are mainly used for swinging, tilting and rotating movements; bearing seats are a combination of radial bearings and seats, which are easy to install and use; linear bearings are used for linear motion guides, including metal linear bearings and plastic linear bearings. In the field of bearing manufacturing, the continuous progress of material science and manufacturing technology is a key factor in promoting the development of the industry. In recent years, the research and development of new materials such as lightweight and high-strength materials, wear-resistant and corrosion-resistant materials, and high-temperature superhard materials have significantly improved the performance and life of bearings. At the same time, the application of advanced manufacturing processes such as 3D printing and laser cladding has also achieved more efficient and precise bearing manufacturing.

[0003] With the rapid development of technologies such as the Internet of Things, big data, and artificial intelligence, the bearing industry has also ushered in new opportunities for intelligent upgrades. The research and development and application of intelligent bearings enable users to remotely monitor and manage bearings in real time, improving the operating efficiency and reliability of equipment. Bearing clearance refers to the amount of movement when the inner or outer ring of the bearing is fixed when it is not installed on the shaft or bearing box, and then the unfixed side of the bearing is moved radially or axially. According to the direction of movement, the clearance can be divided into radial clearance and axial clearance. Summary of the invention

[0004] The present invention overcomes the deficiencies of the prior art and provides a high-speed and heavy-load roller bearing.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a high-speed heavy-load roller bearing, comprising: a bearing ring, a retaining frame arranged inside the bearing ring, and a rolling element arranged inside the retaining frame,

[0006] The bearing ring includes: a bearing inner ring and a bearing outer ring arranged radially outside the bearing inner ring; the rolling body is arranged rollingly between the bearing inner ring and the bearing outer ring;

[0007] The cage includes: a cage seat and a cage beam arranged in the middle of the cage seat; the cage seat and the cage beam are both provided with oil grooves, and the oil grooves are used to form a uniform and stable oil film to reduce the change of clearance caused by the change of the internal structure of the bearing;

[0008] In a preferred embodiment of the present invention, a first rolling groove is provided on the radial inner side of the outer ring of the bearing, and a part of the rolling body is rollingly disposed in the first rolling groove.

[0009] In a preferred embodiment of the present invention, a second rolling groove is provided on the radially outer side of the inner ring of the bearing, and part of the rolling body is rollingly disposed in the second rolling groove.

[0010] In a preferred embodiment of the present invention, the rolling body is a spherical rolling body or a cylindrical rolling body.

[0011] In a preferred embodiment of the present invention, the oil groove comprises a first oil groove and a second oil groove, and the first oil groove and the second oil groove are arranged and distributed in an alternating manner.

[0012] In a preferred embodiment of the present invention, the first oil groove is formed on two inner and outer side surfaces of the circumference of the retainer seat, and the first oil groove is formed in an arc shape.

[0013] In a preferred embodiment of the present invention, the second oil groove is formed on two inner and outer side surfaces of the circumference of the retaining frame beam. The second oil groove is formed in a fishbone shape on the retaining frame beam and points to the middle position of the retaining frame beam.

[0014] In a preferred embodiment of the present invention, two groups of second oil grooves are provided and are symmetrically arranged about the center of the retaining frame beam. The two groups of second oil grooves are used to increase the pumping capacity of the bearing during the rotation of the bearing.

[0015] In a preferred embodiment of the present invention, the cage beams are evenly arranged in the middle of the cage seat, the cage seat and the cage beams are assembled to form pockets, and the rolling bodies are arranged in the pockets.

[0016] In a preferred embodiment of the present invention, the first oil groove and the second oil groove are connected through the pocket hole. The connected first oil groove and the second oil groove allow the lubricating oil to circulate evenly inside the bearing, taking away the heat generated by friction and reducing the influence of thermal expansion on the clearance.

[0017] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0018] (1) The present invention provides a high-speed and heavy-load roller bearing. The first arc-shaped oil groove and two groups of second fishbone-shaped oil grooves are used in conjunction with each other, so that the lubricating oil can form a stable and uniform oil film inside the bearing. This oil film not only serves as a buffer layer between the rolling element and the raceway, effectively reducing the direct contact between the metal parts, thereby greatly reducing the friction coefficient and the degree of wear, but also plays an excellent heat dissipation role, which helps to control the temperature rise during the operation of the bearing and reduce the adverse effects of the clearance caused by thermal expansion. Regardless of whether the bearing is in the forward or reverse rotation state, the fishbone-shaped oil groove can ensure that the lubricating oil is efficiently transported to the key contact area between the rolling element and the raceway, maintaining a continuous lubrication effect. Moreover, the fishbone-shaped branch structure works in coordination like countless tiny pumps during the rotation of the bearing, which not only promotes the circulation of the lubricating oil, but also significantly improves the pumping efficiency of the lubrication system.

[0019] (2) The present invention provides a high-speed, heavy-load roller bearing. Through two sets of second oil grooves with reverse fishbone structures, it is ensured that no matter whether the bearing is in the forward or reverse rotation state, the lubricating oil can be efficiently and continuously transported to the space between the rolling element and the raceway to form a stable lubricating layer. This not only greatly improves the lubrication effect, but also promotes the circulation and pumping of the lubricating oil, effectively reduces the direct friction between metal parts, and extends the service life of the bearing. In addition, the use of cylindrical rolling elements increases the contact area between the rolling elements and the bearing rings, thereby enhancing the radial load-bearing capacity of the bearing, so that the bearing can exhibit more stable performance when subjected to heavy loads. At the same time, combined with the second oil groove that improves the lubrication effect, not only the bearing load-bearing capacity is further improved, but also the clearance changes caused by friction and wear are effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a cross-sectional structure of a bearing according to a preferred embodiment of the present invention;

[0023] In the figure: 1, bearing inner ring; 11, second rolling groove; 2, bearing outer ring; 21, first rolling groove; 3, cage beam; 31, second oil groove; 4, cage seat; 41, first oil groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0028] As shown in the figure, a high-speed and heavy-load roller bearing includes: a bearing ring, a retaining frame arranged inside the bearing ring, and a rolling element arranged inside the retaining frame.

[0029] It should be noted that the bearing ring is the main supporting structure of the bearing, and the bearing ring is further divided into an inner ring and an outer ring. The inner ring is located in the central part of the bearing and cooperates with the shaft to play a supporting and rotating role. The outer ring is located radially outside the inner ring of the bearing and cooperates with the bearing seat or housing to play a fixing and supporting role. The bearing as a whole is also provided with a cage, which is located between the inner ring and the outer ring of the bearing and is used to maintain the position and spacing of the rolling elements. The cage includes a cage seat and a cage beam. The cage seat is the basic part of the cage and provides support for the cage beam. The cage beam is evenly arranged in the middle of the cage seat and forms a pocket together with the cage seat. The bearing as a whole is also provided with rolling bodies, which are located in the pockets of the cage and are used to realize the rolling and rotation of the bearing. The rolling bodies are spherical rolling bodies or cylindrical rolling bodies. The cage seat and the cage beam are assembled to form pockets. The pockets are the accommodating spaces for the rolling bodies, ensuring the correct position and stable movement of the rolling bodies in the bearing. In the present application, the radial direction of the bearing is the direction of the diameter of the bearing cross section, and the axial direction is the direction of the line connecting the centers of the upper and lower circular bottom surfaces of the cylindrical bearing.

[0030] The bearing ring includes: a bearing inner ring and a bearing outer ring arranged outside the circumference of the bearing inner ring; the rolling body is arranged to roll between the bearing inner ring and the bearing outer ring;

[0031] In the present invention, a first rolling groove is opened on the inner side of the circumference of the bearing outer ring, and part of the rolling body is rolled in the first rolling groove. A second rolling groove is opened on the outer side of the circumference of the bearing inner ring, and part of the rolling body is rolled in the second rolling groove.

[0032] It should be noted that the inner ring of the bearing is located in the central part of the bearing and cooperates with the shaft to play a supporting and rotating role. The outer ring of the bearing is located radially outside the inner ring of the bearing and cooperates with the bearing seat or housing to play a fixing and supporting role. The first rolling groove is opened on the side surface inside the circumference of the outer ring of the bearing, and part of the rolling body is rolled in the first rolling groove to increase the contact area between the rolling body and the outer ring of the bearing and improve the radial load-bearing capacity of the bearing. The second rolling groove is opened on the side surface outside the circumference of the inner ring of the bearing, and part of the rolling body is rolled in the second rolling groove, which can also increase the contact area between the rolling body and the inner ring of the bearing and improve the radial load-bearing capacity of the bearing.

[0033] In roller bearings, the contact area between the rolling element (i.e. cylindrical roller or spherical roller) and the inner and outer rings of the bearing is an important factor affecting the bearing's load capacity. When the bearing is under load, pressure will be generated on the contact surface between the rolling element and the bearing ring (the inner and outer rings of the bearing). The larger the contact area, the more evenly these pressures can be distributed over a larger area, thereby reducing the pressure value per unit area. A smaller contact area will lead to excessive local pressure, which will lead to material deformation, wear and even fatigue damage, resulting in increased clearance, while a larger contact area can better disperse these pressures and improve the durability of the bearing. Among them, the bearing's load capacity refers to the maximum load it can safely bear. The increase in contact area means that the rolling element can more effectively disperse and withstand these loads, thereby improving the overall bearing capacity. In high-speed and heavy-load applications, a larger contact area helps ensure that the bearing can still maintain stable operation under extreme conditions. The contact area between the rolling element and the bearing ring will also affect the size of the rolling friction. Although rolling friction is much smaller than sliding friction, the increase in contact area helps to further reduce rolling friction and improve the operating efficiency of the bearing. Smaller rolling friction means less energy loss and lower heat generation. The increase in contact area also helps to improve the fatigue life of the bearing. Under cyclic loads, the contact area between the rolling element and the bearing ring will experience repeated stress and strain cycles. A larger contact area can more effectively disperse these stresses and reduce the risk of local fatigue damage, thereby extending the service life of the bearing. The increase in contact area also helps to improve the lubrication effect of the bearing. The formation of a proper oil film between the rolling element and the bearing ring is essential to reduce friction and wear. A larger contact area provides more space to accommodate lubricants and ensures the formation of a stable oil film during rolling.

[0034] When the contact area is small, extremely high local pressures are generated on the contact surface between the rolling element and the bearing ring when the bearing is loaded. These pressures far exceed the material's bearing capacity and cause significant elastic or plastic deformation in the contact area. Under the action of high local pressures, material deformation occurs in the contact area between the rolling element and the bearing ring, and excessive local pressures also accelerate the wear between the rolling element and the bearing ring. Under high pressure, the micro-convexities on the contact surface are more easily flattened, resulting in increased surface roughness, which further aggravates the wear process. Wear not only reduces the accuracy and performance of the bearing, but also generates a lot of heat and noise. Under cyclic loads, the contact area between the rolling element and the bearing ring undergoes repeated stress and strain cycles. When the contact area is small, these stresses and strains are concentrated in a smaller area, making the material more susceptible to fatigue failure. Fatigue failure is usually manifested as the formation and propagation of cracks, which eventually lead to the failure of the bearing. These material deformations, wear and fatigue failures all lead to an increase in the internal clearance of the bearing. The clearance is the gap between the inner and outer rings of the bearing and between the rolling elements and the inner and outer rings. The increase in clearance will reduce the stiffness and precision of the bearing, making it unable to effectively support and transmit loads. As the clearance increases, it may even lead to complete failure of the bearing.

[0035] When bearings need to withstand high-speed and heavy-load industrial applications, traditional smooth rolling surfaces may not meet the requirements. Therefore, U-shaped semi-enclosed first rolling grooves and second rolling grooves are opened on the circumferential sides of the outer ring and the inner ring of the bearing to increase the contact area between the rolling elements and the bearing rings. The design of these grooves allows the rolling elements to be more evenly distributed inside the bearing during the rolling process, thereby more effectively dispersing and bearing the load. The opening of the grooves can also change the contact stress distribution between the rolling elements and the bearing rings, making the stress more uniform and reducing the possibility of local overload and stress concentration. This helps to improve the fatigue life and overall reliability of the bearing.

[0036] Moreover, in the bearing, by providing the U-shaped semi-enclosed first rolling groove and the second rolling groove on the circumferential side of the outer ring and the inner ring of the bearing, the stable rolling of the rolling element (i.e., cylindrical roller) in the bearing can be significantly affected. The U-shaped semi-enclosed rolling groove provides a clear rolling path for the rolling element. The design of these grooves ensures that the rolling element can roll stably along the predetermined track in the bearing, reducing the deflection and shaking of the rolling element. The opening of the rolling groove increases the contact area between the rolling element and the bearing ring, which can more evenly distribute the load borne by the rolling element during the rolling process, reducing the unit. When the rolling element contacts the groove, the lubricating oil can be better distributed on the contact surface, forming a stable oil film, reducing the direct friction between the rolling element and the bearing ring, and further reducing wear and heat. In this way, by providing grooves on the outer ring and the inner ring of the bearing, the rolling track of the rolling element in the bearing is guided, making it more stable and controllable, avoiding the vibration and noise of the traditional smooth rolling surface under high-speed and heavy-load conditions due to the unstable rolling of the rolling element, and even causing premature failure of the bearing.

[0037] The rolling body is a spherical rolling body or a cylindrical rolling body. The cage beam is evenly arranged in the middle of the cage seat. The cage seat and the cage beam are assembled to form a pocket, and the rolling body is arranged in the pocket. The first oil groove and the second oil groove are arranged in a connected state through the pocket. The connected first oil groove and the second oil groove allow the lubricating oil to circulate evenly inside the bearing, taking away the heat generated by friction and reducing the influence of thermal expansion on the clearance.

[0038] It should be noted that the cage is a component used to fix and separate rolling elements in the bearing, wherein the cage is composed of two cage seats and a number of cage beams evenly arranged therein, the cage seats are arranged on both sides of the cage beams, and after these cage beams and cage seats are assembled and fixed, pockets are formed between the cage beams and the cage seats, and the rolling elements are arranged in these pockets. The cage seats are the main part of the cage, used to support and fix the cage beams, and the cage beams are evenly distributed on the cage seats to form pockets. The shape and size of the pockets match the rolling elements, so that the rolling elements can roll stably in them.

[0039] In the bearing of the present application, the first oil groove and the second oil groove are connected through the pocket hole, thereby ensuring that the lubricating oil can form an effective circulation path inside the bearing. The connected oil grooves enable the lubricating oil to be evenly distributed in various parts of the bearing, including the rolling element, the inner and outer rings, and the contact surface between them. This uniform distribution ensures that each rolling element can be fully lubricated, thereby reducing the friction coefficient and reducing energy loss. As the bearing runs, the rolling element will continuously roll in the pocket hole, while pushing the lubricating oil to circulate in the oil groove. This continuous circulation ensures that the rolling element and the contact surface can continue to obtain fresh lubricating oil, thereby maintaining the best lubrication state. In addition, sufficient lubrication can significantly reduce the wear between the rolling element and the inner and outer rings, because the lubricating oil can fill the tiny gap between them and form a protective film. This protective film can prevent direct contact between metal and metal, thereby extending the service life of the bearing. During the operation of the bearing, a large amount of heat will be generated due to friction and the movement of the rolling element. The lubricating oil will take away the heat generated by friction during the circulation process and transfer it to the outside of the bearing. This heat dissipation mechanism helps to reduce the temperature inside the bearing, thereby preventing thermal expansion and clearance changes. Clearance is one of the key factors in the accuracy and stability of bearing operation. When the lubricating oil circulates inside the bearing, it will take away the heat generated by friction. The connected oil grooves ensure that the lubricating oil can flow smoothly, thereby dissipating heat and cooling more effectively. This helps prevent the bearing from expanding due to overheating, and thus avoids excessive changes in clearance that affect the operating performance of the bearing.

[0040] At the same time, during the operation of the bearing, due to the friction between the rolling element and the inner and outer rings, a large amount of heat will be generated, causing the temperature inside the bearing to rise, which in turn causes the thermal expansion of the material. The thermal expansion will cause the internal clearance (the gap between the rolling element and the inner and outer rings) to change. When the clearance changes due to thermal expansion, the operating performance of the bearing will be significantly affected. For example, too large a clearance may cause the rolling element to shake too much during operation, reducing the rotation accuracy of the bearing; while too small a clearance may increase the friction between the rolling element and the inner and outer rings, generating additional heat and wear. The connected oil groove design, through its special structure and layout, enables the lubricating oil to form an effective circulation path inside the bearing. When the bearing is running, the lubricating oil will be pumped to each friction part to form a thin lubricating film to reduce the direct contact and friction between the rolling element and the inner and outer rings. At the same time, the lubricating oil will also take away the heat generated by friction, and through the connectivity of the oil groove, quickly transfer this heat to the outside of the bearing, thereby reducing the temperature inside the bearing. The connected oil groove design not only improves the lubrication performance of the bearing, but also significantly enhances its heat dissipation capacity. By dissipating heat, the oil groove reduces heat accumulation inside the bearing, thereby reducing the thermal expansion of the material. This means that the change in clearance is effectively controlled and the bearing can maintain a more stable operating state.

[0041] The cage includes: a cage seat and a cage beam arranged in the middle of the cage seat; the cage seat and the cage beam are both provided with oil grooves, and the oil grooves are used to form a uniform and stable oil film to reduce the change of clearance caused by the change of the internal structure of the bearing;

[0042] In the present invention, the oil groove includes a first oil groove and a second oil groove, and the first oil groove and the second oil groove are arranged and distributed in an alternating manner; the first oil groove is opened on the inner and outer side surfaces of the circumference of the retaining frame seat, and the first oil groove is opened in an arc shape; the second oil groove is opened on the inner and outer side surfaces of the circumference of the retaining frame beam, and the second oil groove is opened on the retaining frame beam in a fishbone shape and points to the middle position of the retaining frame beam; two groups of second oil grooves are provided, and are symmetrically arranged about the center of the retaining frame beam, and the two groups of second oil grooves are used to increase the pumping capacity of the bearing during the rotation of the bearing.

[0043] It should be noted that the first oil groove is opened on the retaining frame seat, and is opened on the surface of the inner side and the outer side of the retaining frame seat circumference, and the direction in which the first oil groove is opened is opened along the axial direction of the bearing. The first oil groove is opened in the shape of an arc-shaped groove, and the second oil groove is opened on the surface of the inner side and the outer side of the retaining frame beam circumference. There are two groups of second oil grooves, and the two groups of second oil grooves are symmetrically arranged on the retaining frame beam. Each group of second oil grooves is arranged in a herringbone shape, and the first oil groove is connected with the second oil groove through the pocket hole.

[0044] The first oil groove is located on both sides of the cage seat, along the axial direction of the bearing, providing a basic lubrication channel for the bearing. When the bearing rotates, the lubricating oil is transported between the rolling elements and the raceways through these oil grooves, which helps to reduce direct contact and initially reduce friction. Due to the arc design of the first oil groove, it can adapt to the circular motion of the bearing and ensure that a stable lubricating film can be formed at any rotational position. This helps to reduce the clearance changes caused by friction and wear; the second oil groove is designed as two sets of reverse fishbone shapes, located on the inner and outer sides of the cage beam. This design ensures that whether the bearing is rotating forward or reverse, the lubricating oil can be effectively transported between the rolling elements and the raceways to form a continuous lubrication effect, thereby avoiding the situation in actual applications where the bearing may need to switch frequently between forward and reverse rotation, or in some cases need to withstand reverse rotational force. The fishbone design increases the surface area of ​​the oil groove through multiple branches, which helps to capture more lubricating oil when the bearing rotates. The branches of the fishbone-shaped second oil groove work like tiny pumps when the bearing rotates, pumping lubricating oil from the bottom of the oil groove to between the rolling elements and the raceways. This pumping effect not only enhances the circulation of the lubricating oil, but also ensures that the lubricating oil can be evenly distributed in all parts of the bearing. In addition, two sets of reverse herringbone-shaped oil grooves are located on the inner and outer sides of the cage beam, which means that no matter whether the bearing is rotating forward or reverse, there is a set of oil grooves that can be in the "windward" position, that is, facing the direction of rotation. Therefore, in any direction of rotation, the lubricating oil can be effectively delivered to the rolling elements and raceways.

[0045] It should also be noted that the arc-shaped first oil groove and the two groups of herringbone-shaped second oil grooves ensure that the lubricating oil can form a uniform lubricating film on the contact surface of the rolling elements and raceways of the bearing. This coverage reduces direct contact between metals, thereby reducing friction and wear. In addition, the presence of lubricating oil significantly reduces the friction coefficient between the rolling elements and the raceways. The reduction in the friction coefficient means that under the same load, the friction force inside the bearing is reduced, thereby reducing energy loss and heat generation, and thus avoiding thermal expansion of the bearing itself, as well as wear. By reducing wear, the design of the first oil groove and the second oil groove helps to maintain the bearing clearance within the design range.

[0046] The lubricating oil circulates in the oil groove, so that a stable and uniform oil film is formed in the bearing. This oil film acts as a buffer layer between the rolling element and the raceway, reducing the clearance change caused by load changes or temperature changes. And by increasing the contact area between the rolling element and the bearing ring, the radial load capacity of the bearing is improved. The design of the first rolling groove and the second rolling groove allows the rolling element to have a larger contact surface between the inner ring and the outer ring of the bearing, so that the bearing can disperse the pressure more effectively when it is under heavy load, reduce the uneven change of the clearance, and improve the bearing's load capacity and reliability.

[0047] When the present invention is used, the inner ring of the bearing is located at the center of the bearing, cooperates with the shaft, and plays a role of support and rotation. A second rolling groove is provided on the side surface of the outer circumference of the inner ring of the bearing, and part of the rolling body is rolled in the second rolling groove. The outer ring of the bearing is located radially outside the inner ring of the bearing, and cooperates with the bearing seat or the housing, and plays a role of fixing and supporting. A first rolling groove is provided on the side surface of the inner circumference of the outer ring of the bearing, and part of the rolling body is rolled in the first rolling groove. The cage is located between the inner ring of the bearing and the outer ring of the bearing, and is used to maintain the position and spacing of the rolling body. The cage includes a cage seat and a cage beam evenly arranged in the middle of the cage seat. The cage seat is the basic part of the cage, and provides support for the cage beam. The cage beam and the cage seat together form a pocket hole, which is a accommodating space for the rolling body. The rolling body is located at the pocket hole of the cage, and is used to realize the rolling and rotation of the bearing. The rolling body can be a spherical rolling body or a cylindrical rolling body.

[0048] During operation, when the bearing rotates, the lubricating oil is transported to the space between the rolling element and the raceway through the first oil groove, forming a preliminary lubricating film. The fishbone-shaped second oil groove works like a tiny pump, pumping the lubricating oil from the bottom of the oil groove to the space between the rolling element and the raceway, forming a continuous lubrication effect. The rolling element rolls in the U-shaped semi-enclosed rolling groove, which is more evenly distributed inside the bearing, dispersing and bearing the load more effectively.

[0049] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A high-speed and heavy-loaded roller bearing, comprising: A bearing ring, a retaining frame arranged inside the bearing ring, and a rolling body arranged inside the retaining frame, characterized in that: The bearing ring comprises: a bearing inner ring and a bearing outer ring arranged radially outside the bearing inner ring; the rolling element is arranged to roll between the bearing inner ring and the bearing outer ring; The retainer includes: a retainer seat and a retainer beam arranged in the middle of the retainer seat; the retainer seat and the retainer beam are both provided with oil grooves, and the oil grooves are used to form a uniform and stable oil film to reduce the change of clearance caused by changes in the internal structure of the bearing.

2. A high-speed and heavy-loaded roller bearing according to claim 1, characterized in that: A first rolling groove is provided on the radial inner side of the outer ring of the bearing, and part of the rolling body is rollingly arranged in the first rolling groove.

3. According to claim 2, a high-speed and heavy-loaded roller bearing, characterized in that: A second rolling groove is provided on the radially outer side of the bearing inner ring, and part of the rolling body is rollingly arranged in the second rolling groove. The first rolling groove and the second rolling groove are both arranged in a U shape.

4. A high-speed and heavy-load roller bearing according to claim 1, characterized in that: The rolling body is a spherical rolling body or a cylindrical rolling body, and the rolling body is located in the first rolling groove and the second rolling groove, and the first rolling groove and the second rolling groove are respectively arranged to semi-enclose the upper half and the lower half of the rolling body.

5. A high-speed and heavy-load roller bearing according to claim 1, characterized in that: The oil groove comprises a first oil groove and a second oil groove, and the first oil groove and the second oil groove are arranged and distributed in an alternating manner.

6. A high-speed and heavy-loaded roller bearing according to claim 5, characterized in that: The first oil groove is formed on two inner and outer side surfaces of the retainer seat, and the first oil groove is formed in an arc shape.

7. A high-speed and heavy-loaded roller bearing according to claim 5, characterized in that: The second oil groove is formed on two inner and outer side surfaces of the circumference of the retaining frame beam. The second oil groove is formed on the retaining frame beam in a fishbone shape and points to the middle position of the retaining frame beam.

8. A high-speed and heavy-load roller bearing according to claim 5, characterized in that: There are two groups of the second oil grooves, which are symmetrically arranged about the center of the retaining frame beam. The two groups of the second oil grooves are used to increase the pumping capacity of the bearing during the rotation of the bearing.

9. A high-speed and heavy-load roller bearing according to claim 5, characterized in that: The cage beams are evenly arranged on the cage seat, the cage seat and the cage beams are assembled to form pockets, and the rolling bodies are arranged in the pockets.

10. A high-speed and heavy-load roller bearing according to claim 9, characterized in that: The first oil groove and the second oil groove are connected through the pocket hole, and the connected first oil groove and the second oil groove allow the lubricating oil to circulate evenly inside the bearing, take away the heat generated by friction, and reduce the influence of thermal expansion on the clearance.

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