Creep prevention device for rolling bearing raceway

Abstract

The utility model discloses a creep prevention device for rolling bearing seat circle relates to bearing technical field, including bearing body, the bearing body includes outer race, the cavity of outer race is sleeved and has inner race, the side wall top and bottom of inner race all are fixedly connected with first high strength support ring, the cavity of both ends first high strength support ring all are rotatably connected with a plurality of first roller beads, the inner side wall top and bottom of outer race all are set up with first limit rolling groove, both ends first high strength support ring and both ends first limit rolling groove position correspond, and every roller bead all with corresponding first limit rolling groove sliding connection. The utility model provides bearing body, reduces the generation of creep under the basis of reducing friction wear and vibration impact to reduce clearance, thereby solves the creep failure of existing rolling bearing seat circle because of friction wear, vibration impact and vicious circle of clearance and influences bearing life and equipment safety problem.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and specifically to a creep prevention device for rolling bearing races. Background Technology

[0002] A rolling bearing race is an annular component in a rolling bearing that mates with the shaft (inner ring) or the bearing housing (outer ring) to provide a rolling track for the rolling elements. Creep is a macroscopic, slow plastic deformation of the race material under continuous working stress (such as mating pressure and rolling element contact stress) and a specific temperature (usually >80℃), where the internal atoms slowly diffuse and the crystal dislocations slip, accumulating over a long period of time.

[0003] A search revealed the following publication (announcement) number: CN215171515U, entitled: "Anti-creep rolling bearing." This bearing employs a clearance fit between the rolling bearing and the housing bore, simplifying bearing assembly, eliminating press-fit fixtures, reducing assembly difficulty, and lowering assembly costs. It effectively eliminates variations in the effective clearance of the rolling bearing caused by the fit, simplifying rolling bearing selection calculations. A trapezoidal block is used to fix the outer ring of the rolling bearing, preventing creep under any operating conditions. The simple structure and reasonable design allow for easy assembly and disassembly of the rolling bearing and housing bore under various operating conditions and usage scenarios. It also eliminates uncertainties in the operating environment and potential creep under rapid acceleration and deceleration conditions, effectively reducing assembly costs and after-sales maintenance difficulty, while significantly improving the overall quality of the product.

[0004] The above technical solution has the following shortcomings; In the above scheme, during the actual use of rolling bearings, the seat ring, as the core load-bearing component, is prone to creep failure due to the coupling effect of multiple factors. The specific problems are as follows: First, creep caused by friction and wear: There is long-term relative sliding friction at the contact interface between the seat ring and the rolling element. Especially under heavy load conditions, the accumulation of frictional heat leads to local softening of the seat ring material, aggravated wear of the mating surface, and destruction of the original interference fit relationship, providing initial conditions for radial or axial creep of the seat ring and shortening the service life of the bearing. The second type of structural instability caused by vibration and impact: When the equipment is under high-frequency vibration or sudden impact conditions, the bearing race is subjected to periodic alternating loads. The clearance between the bearing race and the bearing housing will increase instantaneously due to vibration and impact. The bearing race cannot be stably positioned and is prone to accumulation of small displacements. Under long-term action, it will cause significant creep, resulting in a decrease in bearing rotation accuracy, and even causing abnormal noise and jamming of the equipment. The third vicious cycle of clearance changes: Seat ring creep will further expand the mating clearance, and the increased clearance will intensify the effects of friction, wear and vibration, forming a vicious cycle of "increased clearance - intensified creep - further expansion of clearance", which will eventually lead to bearing failure, increase equipment maintenance costs and downtime risks. Especially in key areas such as wind power and rail transportation, this problem can easily cause serious safety hazards. Existing seat ring structures lack effective technical solutions to suppress this vicious cycle. Utility Model Content

[0005] In view of the problems existing in the above-mentioned creep prevention devices for rolling bearing races, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a creep prevention device for rolling bearing races, which solves the problem of creep failure caused by friction wear, vibration impact and vicious cycle of clearance in existing rolling bearing races, affecting bearing life and equipment safety.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A creep prevention device for rolling bearing races includes a bearing body, the bearing body including an outer race, an inner shaft ring sleeved inside the cavity of the outer race, a first high-strength support ring fixedly connected to the top and bottom of the side wall of the inner shaft ring, a plurality of first roller balls rotatably connected to the cavities of the first high-strength support rings at both ends, a first limiting groove provided on the top and bottom of the inner side wall of the outer race, the positions of the first high-strength support rings at both ends corresponding to the first limiting grooves at both ends, and each roller ball slidably connected to the corresponding first limiting groove; One end of the outer race has a limiting groove and is slidably connected to a side limiting baffle. A sealing gasket is fixedly connected to the bottom of the side limiting baffle. An elastic gasket and a first side rotor protection plate are sequentially engaged between the side limiting baffle and the inner shaft ring. A second side rotor protection plate is fixedly connected to the bottom of the inner side wall of the outer race. Both ends of the inner shaft ring have second limiting grooves. The first side rotor protection plate and the second side rotor protection plate are slidably connected to the corresponding second limiting grooves.

[0008] Preferably, the outer bearing ring includes a high thermal conductivity aluminum alloy outer layer, a buffer center layer is fixedly connected to the inner wall of the high thermal conductivity aluminum alloy outer layer, and an alloy structural steel inner layer is fixedly connected to the inner wall of the buffer center layer.

[0009] Preferably, the inner ring includes a high-carbon chromium bearing steel outer layer, an inner layer of chromium-nickel-molybdenum alloy fixedly connected to the inner sidewall of the high-carbon chromium bearing steel outer layer, a buffer ring fixedly connected to the outer sidewall of the high-carbon chromium bearing steel outer layer, and an arc-shaped inner buffer ring fixedly connected to the inner sidewall of the chromium-nickel-molybdenum alloy inner layer through an opening.

[0010] Preferably, multiple corresponding reserved installation ports are provided between the limiting baffle and the side wall of the outer seat ring.

[0011] Preferably, both the first side rotor guard plate and the second side rotor guard plate include a second high-strength support ring, and multiple second roller balls are rotatably connected inside the cavities of the second high-strength support rings at both ends.

[0012] Furthermore, the buffer center layer includes a polyurethane elastic ring, and a spring steel sheet frame is fixedly connected to the outer wall of the polyurethane elastic ring.

[0013] Preferably, the inner wall of the outer bearing ring and the outer wall of the inner bearing ring are both coated with titanium nitride, and the surface of each of the first and second roller balls is coated with a polytetrafluoroethylene self-lubricating coating.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model utilizes an outer bearing ring with a composite structure of "high thermal conductivity aluminum alloy outer layer - buffer center layer - alloy structural steel inner layer". The high thermal conductivity outer layer quickly dissipates frictional heat to avoid high temperature-accelerated creep, the buffer center layer absorbs vibration impact to reduce deformation, and the alloy inner layer improves load-bearing and wear resistance. The inner bearing ring, combined with a high carbon chromium bearing steel outer layer and a chromium-nickel-molybdenum alloy inner layer, balances wear resistance and fatigue resistance. The buffer ring and the arc-shaped inner surface buffer ring reduce impact and assembly stress. The multi-structure synergy inhibits creep from the dimensions of heat, force, and wear, solving the problem that traditional bearing rings are prone to creep failure due to a single factor.

[0015] 2. This utility model utilizes a combination of a side limiting baffle and a sealing gasket to prevent the intrusion of external dust and moisture, thus avoiding impurities that accelerate wear. The first and second side rotor protection plates, through a second high-strength support ring and second rolling balls, protect the first rolling balls and assist the inner shaft ring in stable rotation through rolling friction. The titanium nitride coating on the outer seat ring and inner shaft ring, along with the polytetrafluoroethylene self-lubricating coating on the rolling balls, reduces friction loss and debris generation, preventing a vicious cycle of gaps. This all-round protection and wear-reducing design ensures long-term stable operation of the bearing and reduces creep-inducing factors.

[0016] 3. This utility model utilizes the outer seat ring limiting groove and reserved installation port to ensure precise assembly and firm fixation of the side limiting baffle, avoiding gap problems caused by assembly deviation. The polyurethane elastic ring and spring steel sheet frame of the buffer center layer combine high elasticity and structural stability, making it less prone to deformation and failure after long-term use. The self-lubricating coating on the ball bearing surface reduces dependence on lubricant and lowers maintenance frequency. The multiple designs not only ensure long-term assembly accuracy and buffering effect, but also reduce component wear and significantly extend the overall service life of the bearing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a partial three-dimensional disassembled schematic diagram of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Bearing housing; 2. Outer bearing ring; 3. Inner bearing ring; 4. First high-strength support ring; 5. First roller ball; 6. First limiting groove; 7. Limiting slot; 8. Side limiting baffle; 9. Sealing gasket; 10. Elastic gasket; 11. First side rotor protection plate; 12. Second side rotor protection plate; 13. Second limiting groove; 14. High thermal conductivity aluminum alloy outer layer; 15. Buffer center layer; 16. Alloy structural steel inner layer; 17. High carbon chromium bearing steel outer layer; 18. Chromium-nickel-molybdenum alloy inner layer; 19. Buffer ring; 20. Arc-shaped inner buffer ring; 21. Reserved installation port; 22. Second high-strength support ring; 23. Second roller ball; 24. Polyurethane elastic ring; 25. Spring steel sheet frame. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] This utility model discloses a creep prevention device for rolling bearing races.

[0022] This utility model provides, for example Figure 1-3 The creep prevention device for rolling bearing race shown includes a bearing body 1, which includes an outer race 2. An inner shaft ring 3 is sleeved inside the cavity of the outer race 2. A first high-strength support ring 4 is fixedly connected to the top and bottom of the side wall of the inner shaft ring 3. Multiple first roller balls 5 are rotatably connected inside the cavities of the first high-strength support rings 4 at both ends. A first limiting groove 6 is provided on the top and bottom of the inner side wall of the outer race 2. The positions of the first high-strength support rings 4 at both ends correspond to the positions of the first limiting grooves 6 at both ends. Each roller ball 5 is slidably connected to the corresponding first limiting groove 6. One end of the outer bearing ring 2 has a limiting groove 7 and is slidably connected to a side limiting baffle 8. A sealing gasket 9 is fixedly connected to the bottom of the side limiting baffle 8. An elastic gasket 10 and a first side rotor protection plate 11 are sequentially engaged between the side limiting baffle 8 and the inner shaft ring 3. A second side rotor protection plate 12 is fixedly connected to the bottom of the inner side wall of the outer bearing ring 2. Both ends of the inner shaft ring 3 have second limiting grooves 13. The first side rotor protection plate 11 and the second side rotor protection plate 12 are slidably connected to the corresponding second limiting grooves 13. The bearing body 1 provides the basic framework for the overall bearing structure, ensuring the coordinated operation of all components. The outer race 2 and inner race 3 form the core load-bearing structure of the rolling bearing, achieving relative rotation through a sleeve connection. The first high-strength support ring 4 provides stable mounting support for the first rolling ball 5, enhancing structural stability during ball rotation. The first rolling ball 5, through sliding connection with the first limiting groove 6, converts the sliding friction between the outer race 2 and inner race 3 into rolling friction, reducing friction loss. The first limiting groove 6 restricts the rolling trajectory of the first rolling ball 5, preventing ball deviation and avoiding localized wear caused by uneven friction, thereby reducing the risk of creep failure. The limiting slot 7 provides installation positioning for the side limiting baffle 8, ensuring quick and accurate docking. The side limiting baffle 8 seals the gap between the outer race 2 and inner race 3 from the end, preventing external impurities from entering. The sealing gasket 9 enhances the sealing between the side limiting baffle 8 and the outer race 2, preventing dust and moisture from entering the bearing and causing accelerated wear. The elastic washer 10 buffers the contact impact between the side limiting baffle 8 and the first side rotor protection plate 11, reducing vibration transmission. The first side rotor protection plate 11 cooperates with the second side rotor protection plate 12 to protect the first roller ball 5 from both the inner and outer sides. At the same time, through the sliding connection with the second limiting groove 13, it assists the inner shaft ring 3 to rotate stably, further reducing the probability of creep failure. This solves the problem of creep failure caused by friction wear, vibration impact and vicious cycle of gap in existing rolling bearing housings, which affects bearing life and equipment safety.

[0023] To enhance the thermal conductivity, cushioning, and structural strength of the outer race, such as Figure 2 As shown, the outer bearing race 2 includes a high thermal conductivity aluminum alloy outer layer 14, a buffer center layer 15 is fixedly connected to the inner wall of the high thermal conductivity aluminum alloy outer layer 14, and an alloy structural steel inner layer 16 is fixedly connected to the inner wall of the buffer center layer 15. The high thermal conductivity aluminum alloy outer layer 14 has excellent thermal conductivity, which can quickly dissipate the heat generated by the bearing operation and avoid high temperature accelerating the aging of components. The buffer center layer 15 absorbs vibration impact and reduces the deformation of the outer bearing race 2 caused by vibration. The alloy structural steel inner layer 16 improves the load-bearing strength and wear resistance of the inner wall of the outer bearing race 2, extends the service life of the outer bearing race, and reduces the risk of creep.

[0024] To improve the wear resistance, toughness, and impact resistance of the inner ring, such as Figure 2 As shown, the inner shaft ring 3 includes a high-carbon chromium bearing steel outer layer 17, a chromium-nickel-molybdenum alloy inner layer 18 fixedly connected to the inner wall of the high-carbon chromium bearing steel outer layer 17, a buffer ring 19 fixedly connected to the outer wall of the high-carbon chromium bearing steel outer layer 17, and an arc-shaped inner buffer ring 20 fixedly connected to the inner wall of the chromium-nickel-molybdenum alloy inner layer 18 through an opening. The high-carbon chromium bearing steel outer layer 17 has high hardness and strong wear resistance, which can adapt to long-term friction with the first roller ball 5. The chromium-nickel-molybdenum alloy inner layer 18 enhances the toughness and fatigue resistance of the inner shaft ring 3, preventing the inner shaft ring from breaking due to impact. The buffer ring 19 reduces the collision impact between the inner shaft ring 3 and the first roller ball 5. The arc-shaped inner buffer ring 20 buffers the fitting pressure between the inner shaft ring 3 and the shaft component, reducing creep failure caused by assembly stress.

[0025] To facilitate the fixed installation of the side limiting baffle and the outer seat ring, such as Figure 1 and 2 As shown, multiple corresponding reserved installation ports 21 are provided between the side walls of the limiting baffle 8 and the outer bearing ring 2. The reserved installation ports 21 facilitate the insertion of fasteners such as bolts to achieve a firm fixation between the side limiting baffle 8 and the outer bearing ring 2, preventing the side limiting baffle 8 from loosening and falling off when the bearing is running. At the same time, it ensures accurate installation position and avoids gap problems caused by assembly deviation.

[0026] To enhance the support and auxiliary rotation effect of the side rotor guard plate, such as Figure 2 and 3 As shown, both the first side rotor guard plate 11 and the second side rotor guard plate 12 include a second high-strength support ring 22. Multiple second roller balls 23 are rotatably connected inside the cavities of the second high-strength support rings 22 at both ends. The second high-strength support rings 22 provide stable support for the second roller balls 23, ensuring the structural strength of the guard plate. The second roller balls 23 reduce the frictional resistance between the guard plate and the second limiting groove 13 by rolling, assisting the inner shaft ring 3 to rotate smoothly, while avoiding excessive wear of the guard plate itself and extending the service life of the protective structure.

[0027] To improve the elasticity and structural stability of the buffer center layer, such as Figure 2 As shown, the buffer center layer 15 includes a polyurethane elastic ring 24, and a spring steel plate frame 25 is fixedly connected to the outer wall of the polyurethane elastic ring 24. The polyurethane elastic ring 24 has excellent elastic deformation capability, which can efficiently absorb vibration energy and reduce the vibration transmission of the outer seat ring 2. The spring steel plate frame 25 enhances the structural strength of the polyurethane elastic ring 24, prevents the buffer layer from deforming and failing after long-term use, and ensures stable buffering effect.

[0028] To reduce frictional wear between the bearing seat and the ball bearing, and to improve wear resistance and self-lubricating properties, such as... Figure 2 and 3 As shown, the inner wall of the outer race 2 and the outer wall of the inner shaft race 3 are both coated with titanium nitride. The surface of each first roller ball 5 and the second roller ball 23 is coated with a polytetrafluoroethylene self-lubricating coating. The titanium nitride coating has high hardness and strong wear resistance, which can reduce the friction and wear between the outer race 2, the inner shaft race 3 and the balls, and extend the service life of the race. The polytetrafluoroethylene self-lubricating coating has excellent self-lubricating properties, which can reduce the rolling resistance of the balls without the need for additional lubricant, while reducing the debris generated by wear, avoiding creep failure caused by vicious cycle of gaps, and ensuring long-term stable operation of the bearing.

[0029] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A creep prevention device for rolling bearing races, comprising a bearing body (1), characterized in that, The bearing body (1) includes an outer seat ring (2), an inner shaft ring (3) is sleeved inside the cavity of the outer seat ring (2), a first high-strength support ring (4) is fixedly connected to the top and bottom of the side wall of the inner shaft ring (3), and multiple first roller balls (5) are rotatably connected inside the cavities of the first high-strength support rings (4) at both ends. A first limiting groove (6) is opened at the top and bottom of the inner side wall of the outer seat ring (2), and the positions of the first high-strength support rings (4) at both ends correspond to the positions of the first limiting grooves (6) at both ends. Each roller ball (5) is slidably connected to the corresponding first limiting groove (6). One end of the outer seat ring (2) is provided with a limiting groove (7) and is slidably connected with a side limiting baffle (8). A sealing gasket (9) is fixedly connected to the bottom of the side limiting baffle (8). An elastic gasket (10) and a first side rotor protection plate (11) are sequentially engaged between the side limiting baffle (8) and the inner shaft ring (3). A second side rotor protection plate (12) is fixedly connected to the bottom of the inner side wall of the outer seat ring (2). A second limiting groove (13) is provided on both sides of the inner shaft ring (3). The first side rotor protection plate (11) and the second side rotor protection plate (12) are slidably connected to the corresponding second limiting groove (13).

2. The creep prevention device for rolling bearing races according to claim 1, characterized in that, The outer seat ring (2) includes a high thermal conductivity aluminum alloy outer layer (14), and a buffer center layer (15) is fixedly connected to the inner wall of the high thermal conductivity aluminum alloy outer layer (14), and an alloy structural steel inner layer (16) is fixedly connected to the inner wall of the buffer center layer (15).

3. The creep prevention device for rolling bearing races according to claim 1, characterized in that, The inner ring (3) includes a high carbon chromium bearing steel outer layer (17), the inner wall of the high carbon chromium bearing steel outer layer (17) is fixedly connected to a chromium nickel molybdenum alloy inner layer (18), the outer wall of the high carbon chromium bearing steel outer layer (17) is fixedly connected to a buffer ring (19), and the inner wall of the chromium nickel molybdenum alloy inner layer (18) is fixedly connected to an arc-shaped inner buffer ring (20) through an opening.

4. The creep prevention device for rolling bearing races according to claim 1, characterized in that, Multiple corresponding reserved installation ports (21) are provided between the side wall of the limiting baffle (8) and the outer seat ring (2).

5. The creep prevention device for rolling bearing races according to claim 1, characterized in that, Both the first side rotor guard plate (11) and the second side rotor guard plate (12) include a second high-strength support ring (22), and multiple second roller balls (23) are rotatably connected in the cavity of the second high-strength support ring (22) at both ends.

6. The creep prevention device for rolling bearing races according to claim 2, characterized in that, The buffer center layer (15) includes a polyurethane elastic ring (24), and a spring steel sheet frame (25) is fixedly connected to the outer wall of the polyurethane elastic ring (24).

7. The creep prevention device for rolling bearing races according to claim 1, characterized in that, The inner wall of the outer bearing ring (2) and the outer wall of the inner bearing ring (3) are both provided with titanium nitride coating, and the surface of each of the first roller ball (5) and the second roller ball (23) is provided with polytetrafluoroethylene self-lubricating coating.

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