Solid transfer lubricated hybrid transmission bearing and method of manufacture

Abstract

The application provides a solid transfer lubrication mixed transmission bearing and a manufacturing method, which comprises an outer sleeve ring, an inner sleeve ring, a retainer, rolling balls and lubricating balls, the retainer is arranged between the outer sleeve ring and the inner sleeve ring; at least one side of the retainer in the axial direction is provided with rolling ball pockets, a plurality of the rolling ball pockets are arranged in the circumferential direction of the retainer, the outer sleeve ring, the inner sleeve ring and the rolling ball pockets form a first space for accommodating the rolling balls, an isolation lubricating layer is arranged on the inner wall of the rolling ball pocket, the hardness of the rolling ball is greater than the hardness of the isolation lubricating layer; a lubricating ball pocket is arranged on the outer circumferential surface of the retainer, a plurality of the lubricating ball pockets are arranged in the circumferential direction of the retainer, the outer sleeve ring and the lubricating ball pocket form a second space for accommodating the lubricating balls. The application has a double lubrication effect, realizes solid transfer lubrication, can realize low friction coefficient sliding friction, and can realize dynamic compensation of rolling and sliding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing structure design, in particular to a solid transfer lubrication mixed transmission bearing and a manufacturing method. BACKGROUND

[0002] The use environment of bearings includes but is not limited to high temperature, high pressure, specific medium (water, inert gas, metal solution), impact, etc. The main functions of bearings are bearing and transmission, which need to meet the requirements of service life, ensure transmission accuracy, intermittent operation, etc. under the above working conditions.

[0003] The bearings in the prior art are generally composed of a sleeve ring, a rolling body and a retainer. The sleeve ring and the rolling body are made of high-temperature bearing steel, heat-resistant alloy steel, stainless bearing steel or ceramic (typical materials include G95Cr18 series, GH05 and Cr14Mo4V). The retainer is generally made of metal or engineering plastic. The above-mentioned bearings in the prior art can only be used alone under certain working conditions. Due to the characteristics of the material itself, impact resistance requires high toughness, and wear resistance requires high hardness and high strength of the material at high temperature. In order to meet the requirements of service life, the bearings need to be lubricated by plating and solid transfer lubrication to reduce the friction coefficient under the condition of oil-free lubrication.

[0004] The bearings in the prior art cannot simultaneously meet the requirements of high temperature resistance, radiation resistance, corrosion resistance, impact resistance, wear resistance, high precision, long service life and oil-free lubrication, and there is room for improvement. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a solid transfer lubrication mixed transmission bearing and a manufacturing method.

[0006] According to the solid transfer lubrication mixed transmission bearing provided by the present application, the retainer is arranged between the outer sleeve ring and the inner sleeve ring.

[0007] At least one side of the retainer in the axial direction is provided with a rolling ball pocket, a plurality of rolling ball pockets are arranged along the circumferential direction of the retainer, the outer sleeve ring, the inner sleeve ring and the rolling ball pocket form a first space for accommodating the rolling ball, and an isolation lubricating layer is arranged on the inner wall of the rolling ball pocket. The hardness of the rolling ball is greater than the hardness of the isolation lubricating layer.

[0008] The outer circumferential surface of the retainer is provided with a lubricating ball pocket, a plurality of lubricating ball pockets are arranged along the circumferential direction of the retainer, and the outer sleeve ring and the lubricating ball pocket form a second space for accommodating the lubricating ball.

[0009] Preferably, the rolling ball pockets are provided with a group on both sides of the retaining frame in the axial direction, and the inner rings are provided with a group on both sides of the outer ring in the axial direction, and the two groups of inner rings correspond to the two groups of rolling ball pockets one by one.

[0010] Preferably, the rolling ball pockets and the lubricating ball pockets are arranged alternately along the circumference of the retaining frame.

[0011] Preferably, a first coupling inclined surface is provided on the axial side surface of the outer ferrule, and a second coupling inclined surface is provided on the outer circumference of the inner ferrule, and the first coupling inclined surface is coupled to the second coupling inclined surface.

[0012] Preferably, the rolling ball is in point contact with the inner wall of the rolling ball pocket, and the rolling ball and the rolling ball pocket are in clearance fit;

[0013] A first raceway is provided on the inner wall of the outer ring, the rolling ball and the first raceway are in single-point contact, and the microscopic contact state between the rolling ball and the first raceway is elliptical elastic contact;

[0014] A second raceway is provided on the outer wall of the inner ring. The rolling ball and the second raceway are in single-point contact. The microscopic contact state between the rolling ball and the second raceway is elliptical elastic contact.

[0015] Preferably, the inner ring includes an outer circle, a second raceway and a sliding friction surface arranged in sequence along the axial direction. The sliding friction surface is in sliding contact with the outer ring and / or the retaining frame. This sliding contact state and the contact state of the inner ring, outer ring and steel ball under normal operation of the bearing produce a mutual compensation effect as the bearing wears during operation. The sliding contact surface can be adjusted to contact a smooth cylindrical hole and a smooth cylindrical shaft with an intermittent isolation layer. The retaining frame is provided with a channel connecting the sliding friction surface and the lubrication ball pocket hole; a guide hole is provided on the outer circle of the inner ring, and the guide hole connects the internal space of the bearing and the external space of the bearing.

[0016] Preferably, the outer ring comprises an impact-resistant outer ring body and a wear-resistant isolation layer, wherein the isolation layer covers the first raceway and the first coupling inclined surface and extends to the end surface area of ​​the outer ring body;

[0017] The inner ring includes an impact-resistant inner ring body and a wear-resistant isolation layer, wherein the isolation layer covers the second raceway and the sliding friction surface and extends to the end surface area of ​​the inner ring body;

[0018] The retainer comprises an impact-resistant retainer body and an isolation layer, wherein the isolation layer comprises a bonding layer, a strengthening layer and a lubricating layer which are sequentially arranged and combined with a base body.

[0019] Preferably, the hardness of the retaining frame is lower than the hardness of the rolling ball, and the hardness of the retaining frame is greater than the hardness of the lubricating ball.

[0020] According to the present invention, a method for manufacturing a solid transfer lubrication hybrid transmission bearing is provided, the manufacturing method comprising:

[0021] Install the lubricating balls into the lubricating ball pockets of the cage in sequence, insert the cage into the inner hole of the outer ring, install the rolling balls from one side of the inner hole of the outer ring in sequence, and then install the inner ring to complete the installation of one side of the bearing;

[0022] Install the rolling balls from the other side of the inner hole of the outer ring, and then install the inner ring to complete the installation on both sides of the bearing.

[0023] Preferably, after installation, fix the inner ring with a rotating shaft, press the end face, measure the axial and radial clearances of the outer ring, compare them with the design clearance, and adjust the bearing clearance value to the design value by grinding the contact surface of the inner ring.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention provides an isolation lubrication layer at the rolling ball pocket and a lubricating ball on the outer circumference of the cage, thereby achieving lubrication on the side of the cage and the middle of the outer circumference of the cage respectively, with a dual lubrication effect, and realizes lubrication by solid transfer lubrication phase, which can achieve sliding friction with a low friction coefficient and can realize dynamic compensation of rolling and sliding.

[0026] 2. The present invention adopts double semi-inner rings as the inner ring, which can realize the installation of rolling elements without gaps and ensure the consistency of the bearing rings. The integral inner ring cannot complete the installation of rolling elements and internal retaining frames without a gap. The outer ring adopts an integrated outer ring and does not use two rings to cooperate with the inner ring respectively. The main purpose is to ensure the integrity of the boundary and encapsulate the retaining frame inside to form a semi-sealed cavity, which can increase the lubrication effect of transfer lubrication.

[0027] 3. The present invention provides a guide hole on the outer circle of the inner ring, and the guide hole connects the inner space of the bearing and the outer space of the bearing. The guide hole provided on the inner ring enables the bearing to have an appropriate chip removal function. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0029] Figure 1 This is a schematic diagram mainly showing the overall structure of the bearing of the present invention;

[0030] Figure 2 This is a cross-sectional view mainly showing the overall structure of the bearing of the present invention;

[0031] Figure 3 This is an exploded view of the overall structure of the bearing mainly embodies the present invention;

[0032] Figure 4 This is an axial side schematic diagram mainly showing the overall structure of the outer ring of the present invention;

[0033] Figure 5 This is a cross-sectional view mainly showing the overall structure of the outer ring of the present invention;

[0034] Figure 6 This is a schematic diagram mainly showing the overall structure of the inner ferrule of the present invention;

[0035] Figure 7 This is an axial side schematic diagram mainly showing the overall structure of the cage of the present invention;

[0036] Figure 8 This is a side view schematic diagram of the overall structure of the retainer mainly embodied in the present invention;

[0037] Figure 9 This is a cross-sectional view mainly showing the overall structure of the retainer of the present invention.

[0038] As shown in the figure:

[0039] Outer ring 1 Cage 3

[0040] First coupling slope 11 Rolling ball pocket 31

[0041] First raceway 12 isolation lubrication layer 32

[0042] Inner ring 2 Lubrication ball pocket hole 33

[0043] Second coupling slope 21 Rolling ball 4

[0044] Second raceway 22 Lubricating ball 5

[0045] Diversion hole 23 DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0047] like Figure 1 、 Figure 2 as well as Figure 3As shown, a solid transfer lubrication hybrid transmission bearing according to the present invention includes an outer ring 1, an inner ring 2, a retainer 3, rolling balls 4, and lubricating balls 5. The retainer 3 is disposed between the outer ring 1 and the inner ring 2. A rolling ball pocket 31 is provided on at least one axial side of the retainer 3. Multiple rolling ball pockets 31 are arranged circumferentially along the retainer 3. The outer ring 1, inner ring 2, and rolling ball pockets 31 together form a first space for accommodating the rolling balls 4. An isolation lubricating layer 32 is provided on the inner wall of the rolling ball pocket 31. The rolling balls 4 have a harder hardness than that of the isolation lubricating layer 32. Multiple lubricating ball pockets 33 are provided on the outer circumferential surface of the retainer 3. The outer ring 1 and the lubricating ball pockets 33 together form a second space for accommodating the lubricating balls 5.

[0048] It is important to emphasize that the bearings described herein are suitable for use in low-speed, intermittent, high-temperature, and radiation-resistant operating conditions subject to impact loads. Through material combination and fabrication, these bearings possess excellent comprehensive performance under harsh operating conditions, including resistance to high temperatures, radiation, wear, and impact, high precision, dynamic compensation, and continuous solid-transfer lubrication.

[0049] In a preferred embodiment, a group of rolling ball pockets 31 are provided on both axial sides of the retaining frame 3, and a group of inner rings 2 are provided on both axial sides of the outer ring 1. The two groups of inner rings 2 correspond one to one with the two groups of rolling ball pockets 31.

[0050] The following contents are based on the corresponding quantities of each bearing structure: 11 outer rings, 22 inner rings, 31 retainers, 4 rolling balls, and 5 lubricating balls.

[0051] Under normal operating conditions, one inner ring 2 forms a contact rolling fit with a group of rolling balls 4 on the left side of the inner bore of the outer ring 1, and the other inner ring 2 forms a contact rolling fit with the rolling balls 4 on the right side of the inner bore of the outer ring 1. Furthermore, the number of rolling balls 4 in the bearing varies depending on the specific operating conditions of the bearing. This application provides a typical value of 15×2=30 (2 rows of rolling balls 4). The number of lubricating balls 5 is determined based on the structural distribution of the retaining frame 3. Its number is generally based on the number of rolling balls 4. This application provides a feasible typical value of 15, which is generally determined based on design calculations and stress analysis. It should be emphasized that this application does not specifically limit the number of rolling balls 4 or the number of lubricating balls 5.

[0052] In a preferred embodiment, the rolling ball pockets 31 and the lubricating ball pockets 33 are arranged alternately along the circumference of the cage 3 .

[0053] Specifically, if Figure 3 、 Figure 4 as well as Figure 5As shown, the outer ring 1 has a circular ring shape and is a smooth cylindrical surface. A first coupling bevel 11 and a first raceway 12 are machined on the inner wall of the inner bore of the outer ring 1. Specifically, the first coupling bevel 11 is provided on the axial side of the outer ring 1. Two first raceways 12 are arranged side by side, symmetrically on the left and right sides of the inner bore of the outer ring 1. The first raceways 12 encircle the inner bore of the outer ring 1, and the cross-section of the first raceway 12 along the axis of the outer ring 1 is a circular arc. More specifically, the radius of the first raceway 12 is greater than the radius of the rolling ball 4 to ensure single-point contact between the rolling ball 4 and the first raceway 12. The microscopic contact between the rolling ball 4 and the first raceway 12 is an elliptical elastic contact. The first coupling bevel 11 is provided at the opening of the inner bore of the outer ring 1 and forms a certain angle with the axis of the outer circumference of the outer ring 1.

[0054] The outer ring 1 includes an impact-resistant outer ring body and a wear-resistant isolation layer. The isolation layer covers the first raceway 12, the first coupling bevel 11 and extends to the end face area of ​​the outer ring body. More specifically, the outer ring 1 consists of an outer ring body and an isolation layer. The isolation layer of the outer ring 1 is located inside the outer ring body 1. The isolation layer of the outer ring 1 includes the first raceway 12, the first coupling bevel 11 and extends to the end face area. The isolation layer of the outer ring 1 is made of wear-resistant material and has high hardness and high strength. The preparation method of the isolation layer of the outer ring 1 mainly includes laser cladding, additive manufacturing, etc. The outer ring 1 body includes parts other than the isolation layer of the outer ring 1. The outer ring 1 body is made of a tough material that meets the impact requirements, taking into account the strength requirements under the design working conditions. Before preparing the isolation layer, the outer ring 1 body should have sufficient shape margin to offset the heat, force deformation, etc. caused by the preparation process.

[0055] The outer bearing ring 1 is made of high-temperature resistant bearing steel as its main body, has high structural toughness and is impact-resistant, and is provided with an isolation reinforcement layer at the raceway and sliding coupling to ensure its wear resistance under harsh operating conditions.

[0056] More specifically, Figure 3 and Figure 6 As shown, the inner ring 2 has a circular outer structure with a smooth cylindrical inner hole. The inner ring 2 comprises an outer circumference and a cylindrical portion. The diameter of the cylindrical portion is smaller than that of the outer circumference. A second coupling bevel 21 is provided on the outer circumference of the inner ring 2, forming a certain angle with the axis of the inner ring 2. The first coupling bevel 11 couples with the second coupling bevel 21. A second raceway 22 is provided on the outer wall of the junction of the outer circumference and the cylindrical portion of the inner ring 2. The rolling ball 4 and the second raceway 22 form a single-point contact, and the microscopic contact state between the rolling ball 4 and the second raceway 22 is elliptical elastic contact.

[0057] A second raceway 22 is provided on the inner ring 2, encircling the outer circumference of the inner ring 2. Its cross-section, along the axis of the inner ring 2, is an arc. The radius of the second raceway 22 is greater than that of the rolling ball 4, ensuring single-point contact between the rolling ball 4 and the arc-shaped raceway. Microscopically, the contact is an elliptical elastic contact.

[0058] The outer surface of the cylindrical part of the inner ring 2 is the sliding friction surface. The inner ring 2 includes an outer circle, a second raceway 22 and a sliding friction surface arranged in sequence along the axial direction. The sliding friction surface is in sliding contact with the outer ring 1 and / or the retaining frame 3. As the bearing rolls and the clearance changes, the initial gap of the sliding friction surface changes from large to small. When it wears to contact, the bearing is now a mixed transmission of sliding friction and rolling friction. At the same time, the solid lubricant in the retaining frame 3 is continuously and stably precipitated, and the rolling and sliding surfaces are lubricated at the same time. Under steady-state conditions such as low speed and high temperature, it has stable and continuous working ability.

[0059] The inner ring includes an impact-resistant inner ring body and a wear-resistant isolation layer. The isolation layer covers the second raceway 22, the sliding friction surface and extends to the end face area of ​​the inner ring body. The inner ring 2 consists of an inner ring body and an isolation layer. The isolation layer of the inner ring 2 covers the second raceway 22, the sliding friction surface and extends to the end face area. The isolation layer of the inner ring 2 is made of wear-resistant material and has high hardness and strength. The preparation methods of the isolation layer of the inner ring 2 mainly include laser cladding, additive manufacturing, etc. The inner ring 2 body is made of a tough material that meets the impact requirements and takes into account the strength requirements under the design working conditions. Before preparing the isolation layer, the inner ring 2 body should have sufficient external shape margin to offset the heat, stress deformation, etc. caused by the preparation process. A guide hole 23 is provided on the outer circle of the inner ring 2, and the guide hole 23 connects the internal space of the bearing and the external space of the bearing.

[0060] The inner ring 2 and outer ring 1 can be engaged by locking edges and lubricated by a solid transfer lubricant phase, achieving sliding friction with a low friction coefficient and enabling dynamic compensation of rolling and sliding. The guide holes 23 provided on the inner ring 2 enable the bearing to have an appropriate chip removal function.

[0061] Specifically, Figure 3 、 Figure 7 、 Figure 8 as well as Figure 9 As shown, the outer shape of the retainer 3 is annular, and pockets are distributed on the retainer 3. The pockets on the retainer 3 include rolling ball pockets 31 and lubricating ball pockets 33. The rolling ball pockets 31 are arranged in two rows on the retainer 3. Preferably, the number of rolling ball pockets 31 in the two rows is the same. The two rows of rolling ball pockets 31 are respectively arranged on the left and right sides of the retainer 3 axially. The two rolling ball pockets 31 are symmetrically arranged and surround the retainer 3 along the circumferential direction.

[0062] The ball pocket 31 is an open cylindrical structure, meaning its cylindrical surface is discontinuous, with one side open. During assembly, the ball pocket 31 engages with the ball 4, and the retainer 3 achieves coupling through contact between the surface of the ball pocket 31 and the outer surface of the ball 4. As the ball 4 rolls within the first and second raceways 12 and 22, the ball pocket 31 of the retainer 3 rotates circumferentially due to the contact stress of the ball 4. The ball 4 makes point contact with the inner wall of the ball pocket 31, while the ball 4 and the pocket 31 have a clearance fit. During bearing operation, the ball 4 collides and contacts within the retainer 3's ball pocket 31. The small clearance fit allows for easy control of the ball 4's center of mass trajectory, effectively controlling impact forces and optimizing contact stress.

[0063] Lubricating ball pockets 33 are distributed centrally along the outer circumference of the retainer 3, with the same number as the single-row rolling ball pockets 31. The lubricating ball pockets 33 feature an initial cylindrical shape with a spherical bottom, the diameter of which matches the diameter of the lubricating balls 5. The fit between the lubricating ball pockets 33 and the lubricating balls 5 varies depending on the operating medium. In aqueous media, the graphite lubricating balls 5 can fit into the pockets 33 with an interference fit, meaning they are pressed into the pockets 33. In aqueous media, powder detached from the solid graphite lubricating balls 5 diffuses and adheres to the rolling balls 4, achieving lubrication. In gaseous media, a small clearance fit can be employed. During operation of the retainer 3, the lubricating balls 5 generate friction with the pockets 33, releasing powder that not only lubricates the lubricating balls themselves but also diffuses through the gap between the retainer 3 and the bearing rings to the rolling balls 4 and the bearing ring raceways, achieving transfer lubrication. Furthermore, a channel connecting the sliding friction surface and the lubricating ball pocket hole 33 is provided on the retaining frame 3.

[0064] Cage 3 consists of a cage body and an isolation layer. It should be noted that the isolation lubricating layer 32, located on the inner wall of the ball pocket 31, is made of a material with a slightly lower hardness than both the cage body and the balls 4. During bearing operation, the isolation lubricating layer 32 makes contact with the balls 4 in a random manner, potentially with and without contact. This prevents the isolation lubricating layer 32 from rapidly consuming and potentially causing bearing failure.

[0065] During bearing operation, the isolation and lubrication layer 32 is in contact with the rolling ball 4. The rolling ball 4 has a higher hardness than the isolation and lubrication layer 32. Some of the material from the isolation and lubrication layer 32 is then removed from the surface of the rolling ball 4 and carried to the raceways of the inner and outer rings 1, lubricating both the rolling ball 4 and the raceways. The isolation and lubrication layer 32 is manufactured by mixing a material with a specific strength and lubricating properties, achieving a desired strength and lubrication performance. The appropriate strength controls the rate at which the lubricating layer is consumed, and the lubricating phase is used to lubricate the bearing. Methods for preparing the isolation and lubrication layer 32 include laser cladding and additive manufacturing.

[0066] The side of the pocket of retainer 3 is also laser-claded with a lubricating isolation layer. The isolation layer here is different from the isolation layer of the ring. The main function of the isolation layer of retainer 3 is not to improve wear resistance. The isolation layer of the pocket is mainly divided into three layers. The bonding layer combined with the substrate is the bonding layer, which is mainly used to improve the bonding strength. The outer layer is the strengthening layer, which is mainly used to improve its own strength to prevent corrosion and disintegration during long-term use. The outermost layer is the lubricating layer, which mainly uses a composite layer of strengthening and lubricating phases to ensure both lubrication function and medium wear resistance. The ratio of the strengthening phase and the lubricating phase is determined through experiments. The lubricating phase is not wear-resistant and is easily consumed too quickly. It needs to be neutralized with a strengthening phase to adjust its wear rate.

[0067] The hardness of the cage 3 is lower than that of the rolling balls 4 to ensure the integrity and wear resistance of the rolling balls 4 during contact wear. The hardness of the cage 3 is greater than that of the lubricating balls 5. Before the insulation layer is formed, sufficient external margin should be left for the cage 3 to offset deformation caused by heat and stress during the manufacturing process.

[0068] Cage 3 is positioned between the two inner ring halves and guided by rolling balls 4 to prevent bearing seizure under impact loads. The rolling balls 4 are lubricated by the cage's isolation lubrication layer 32 and by powder from lubricating balls 5 installed within the cage. The cage's material maintains a minimal hardness difference with the rolling balls 4. The rolling ball pockets 31 are open, leaving space on the other side for the inner ring 2. The cage's isolation lubrication layer 32 and lubricating ball pockets 33 provide solid-state lubrication.

[0069] For ease of understanding, the technical solution of this application provides a feasible implementation method:

[0070] The bearing structure includes an outer ring 1, two identical inner rings 2, a cage 3, 30 rolling balls 4, and 15 lubricating balls 5. The first raceway 12 and second raceway 22 on the left side of the outer ring 1, along with the ball pockets 31 on the left side of the cage 3, accommodate the 15 rolling balls 4. The first raceway 12 and second raceway 22 on the right side of the outer ring 1, along with the ball pockets 31 on the right side of the cage 3, accommodate the 15 rolling balls 4. The 15 lubricating ball pockets 33 in the center of the cage 3 also accommodate the 15 lubricating balls 5.

[0071] The guide hole 23 on the inner ring 2 is allowed to be designed in an inclined form according to the axial rotation direction and guide requirements, that is, there is a certain inclination angle between the hole axis and the bearing end face, and the size of the inclination angle must also be different according to the specific function. In this embodiment, the typical bearing inclination angle is 90°, which is suitable for guide and chip removal under normal working conditions. If the speed is increased or there is a cooling requirement, the inclination angle of the inner ring 2I can be set to positive and the inclination angle of the inner ring 2II can be set to negative, which can realize the optimization of the flow channel under the bearing rotation condition and enhance cooling.

[0072] The present invention also provides a method for manufacturing a solid transfer lubrication hybrid transmission bearing, which is used to manufacture the above-mentioned solid transfer lubrication hybrid transmission bearing. The manufacturing method includes:

[0073] Install the lubricating balls 5 into the lubricating ball pockets 33 of the retaining frame 3 in sequence, insert the retaining frame 3 into the inner hole of the outer ring 1, and install the rolling balls 4 from one side of the inner hole of the outer ring 1 in sequence, and then install the inner ring 2 to complete the installation of one side of the bearing.

[0074] Install the rolling ball 4 from the other side of the inner hole of the outer ring 1, and then install the inner ring 2 to complete the installation of both sides of the bearing.

[0075] After installation, fix the inner ring 2 with a rotating shaft, press the end face, measure the axial and radial clearances of the outer ring 1, compare them with the designed clearance, and adjust the bearing clearance value to the designed value by grinding the contact surface of the inner ring 2.

[0076] It should be noted that there are many ways to install bearings and external components. The typical method is that the outer ring 1 is installed in the bearing support seat, the end face is tightened and fixed by the bearing cover, and the inner ring 2 is installed on the rotating shaft and locked by round nuts and washers.

[0077] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application.

[0078] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A solid transfer lubrication hybrid transmission bearing, characterized in that: It comprises an outer ring (1), an inner ring (2), a retaining frame (3), a rolling ball (4) and a lubricating ball (5), wherein the retaining frame (3) is arranged between the outer ring (1) and the inner ring (2); A rolling ball pocket (31) is provided on at least one axial side of the retainer (3), and a plurality of rolling ball pockets (31) are arranged circumferentially of the retainer (3). The outer ring (1), the inner ring (2), and the rolling ball pocket (31) form a first space for accommodating a rolling ball (4). An isolation lubricating layer (32) is provided on the inner wall of the rolling ball pocket (31), and the hardness of the rolling ball (4) is greater than the hardness of the isolation lubricating layer (32). A lubricating ball pocket hole (33) is provided on the outer circumferential surface of the retainer (3), and a plurality of the lubricating ball pocket holes (33) are arranged circumferentially along the retainer (3). The outer ring (1) and the lubricating ball pocket holes (33) form a second space for accommodating the lubricating ball (5); In the water medium, the lubricating ball (5) of graphite material is fitted with the lubricating ball pocket (33) in an interference fit state, that is, the lubricating ball (5) is tightly fitted with the lubricating ball pocket (33) by pressing in, and in the water medium, powder peeled off from the lubricating ball (5) diffuses and adheres to the rolling ball (4) to achieve lubrication; or Under the gas medium, the lubricating ball (5) of graphite material and the lubricating ball pocket (33) are matched with a small gap. During the operation of the retaining frame (3), the lubricating ball (5) generates friction with the lubricating ball pocket (33). The powder peeled off not only lubricates itself, but also diffuses to the rolling ball (4) and the ring raceway through the gap between the retaining frame (3) and the ring, thereby realizing transfer lubrication. The rolling ball pocket holes (31) are provided with a group on both sides of the retaining frame (3) in the axial direction, and the inner ring (2) is provided with a group on both sides of the outer ring (1) in the axial direction, respectively. The two groups of inner rings (2) correspond to the two groups of rolling ball pocket holes (31) in a one-to-one manner. The outer ferrule (1) is provided with a first coupling bevel (11) on the axial side surface, and the outer circumferences of the two groups of inner ferrules (2) are respectively provided with a second coupling bevel (21), and the first coupling bevel (11) is coupled with the second coupling bevel (21); The inner ring (2) comprises an outer circle, a second raceway (22) and a sliding friction surface arranged in sequence along the axial direction, the sliding friction surface is in sliding contact with the outer ring (1) and the retaining frame (3), and the retaining frame (3) is provided with a channel connecting the sliding friction surface and the lubricating ball pocket hole (33); A guide hole (23) is provided on the outer circle of the inner ring (2), and the guide hole (23) communicates the inner space of the bearing with the outer space of the bearing.

2. The solid transfer lubrication hybrid transmission bearing according to claim 1, characterized in that: In a direction along the circumference of the retaining frame (3), the rolling ball pocket holes (31) and the lubricating ball pocket holes (33) are arranged alternately at intervals.

3. The solid transfer lubrication hybrid transmission bearing according to claim 1, characterized in that: The rolling ball (4) is in point contact with the inner wall of the rolling ball pocket (31), and the rolling ball (4) and the rolling ball pocket (31) are in clearance fit; A first raceway (12) is provided on the inner wall of the outer ring (1), the rolling ball (4) and the first raceway (12) are in single-point contact, and the microscopic contact state between the rolling ball (4) and the first raceway (12) is an elliptical elastic contact; A second raceway (22) is provided on the outer wall of the inner ring (2), the rolling ball (4) and the second raceway (22) are in single-point contact, and the microscopic contact state between the rolling ball (4) and the second raceway (22) is elliptical elastic contact.

4. The solid transfer lubrication hybrid transmission bearing according to claim 3, characterized in that: The outer ring (1) comprises an impact-resistant outer ring body and a wear-resistant isolation layer, wherein the isolation layer covers the first raceway (12), the first coupling bevel (11) and extends to the end face area of ​​the outer ring body; The inner ring (2) comprises an impact-resistant inner ring body and a wear-resistant isolation layer, wherein the isolation layer covers the second raceway (22), the sliding friction surface and extends to the end face area of ​​the inner ring body; The retainer (3) comprises an impact-resistant retainer body and an isolation layer, and the isolation layer of the retainer (3) comprises a bonding layer, a strengthening layer, and a lubricating layer which are sequentially arranged and combined with a base body.

5. The solid transfer lubrication hybrid transmission bearing according to claim 1, characterized in that: The hardness of the retaining frame (3) is lower than the hardness of the rolling ball (4), and the hardness of the retaining frame (3) is greater than the hardness of the lubricating ball (5).

6. A method for manufacturing a solid transfer lubrication hybrid transmission bearing, characterized in that: The solid transfer lubrication hybrid transmission bearing according to any one of claims 1 to 5 is manufactured by a method comprising: Install the lubricating balls (5) into the lubricating ball pockets (33) of the retainer (3) in sequence, insert the retainer (3) into the inner hole of the outer ring (1), install the rolling balls (4) from one side of the inner hole of the outer ring (1), and then install a set of inner rings (2) to complete the installation of one side of the bearing; Install the rolling balls (4) from the other side of the inner hole of the outer ring (1) in sequence, and then install the other set of inner rings (2) to complete the installation of both sides of the bearing.

7. The method for manufacturing a solid transfer lubrication hybrid transmission bearing according to claim 6, wherein: After installation, fix the inner ring (2) with the rotating shaft, press the end face, measure the axial and radial clearances of the outer ring (1), compare them with the design clearance, and adjust the bearing clearance value to the design value by grinding the contact surface of the inner ring (2).

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