A high-strength bearing that is less susceptible to damage
By using a multi-layered material structure and sealing component design, the problem of raceway surface damage in rolling bearings under heavy loads has been solved, resulting in high-strength bearings that are not easily damaged and extending their service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CIXI WENYE BEARING CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-10
AI Technical Summary
When subjected to heavy loads, existing rolling bearings are prone to localized plastic deformation in the contact area between the raceway and the rolling elements, resulting in indentations or microcracks on the raceway surface, which affects the service life of the bearing.
The design employs a multi-layer material structure, including an outer ring, sealing components, and multiple reinforcing layers. It utilizes materials such as ultra-clean high-carbon chromium steel and silicon nitride ceramics, and is connected through vacuum diffusion welding and hot isostatic pressing composite processes. Combined with sealing components and oil injection holes, it prevents the intrusion of external hard particles and maintains the cleanliness and lubrication of the raceway.
It effectively prevents the formation of indentations and pits on the raceway surface, improves the bearing's resistance to damage and service life, and extends the bearing's service life.
Smart Images
Figure CN224479194U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bearing technology, and in particular relates to a high-strength bearing that is not easily damaged. Background Technology
[0002] Bearings are key components used to support rotating mechanical bodies and reduce the coefficient of friction during their movement. They achieve relative movement between a shaft and a bearing seat through rolling or sliding. They are mainly divided into two categories: rolling bearings and sliding bearings. They are usually composed of components such as an inner ring, an outer ring, rolling elements, and a cage, and are widely used in various mechanical equipment, automobiles, aerospace, and industrial manufacturing fields.
[0003] When existing rolling bearings are subjected to heavy loads, the contact area between the raceway and the rolling elements is prone to local plastic deformation, which can lead to indentations or microcracks on the raceway surface. In particular, when hard external particles intrude into the lubricating medium, the raceway surface can be crushed into pits. These damages can accelerate bearing fatigue failure, cause the rolling element trajectory to deviate, exacerbate stress concentration at the raceway edge, and ultimately shorten the bearing's service life, making it unsuitable for use.
[0004] To address these issues, we provide a high-strength, durable bearing. Utility Model Content
[0005] The purpose of this invention is to provide a high-strength, durable bearing. By combining the outer ring and the sealing assembly, it solves the problem in the prior art where bearings undergo localized plastic deformation of the raceway under load, resulting in indentations or microcracks on the raceway surface and reducing the bearing's service life.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.
[0007] This utility model relates to a high-strength, durable bearing, comprising an outer ring, a sealing assembly on the inner wall of the outer ring, a retainer fitted on the surface of the sealing assembly, and balls slidably connected inside the retainer. The sealing assembly includes two inner rings, each extending into the interior of the outer ring on opposite sides and threaded together on opposite sides. Sealing rings are provided at the top and bottom of the outer ring, each slidably connected to an inner ring on opposite sides. The outer ring includes a bearing base layer, a base reinforcement layer fixedly connected to the surface of the bearing base layer, a pressure-resistant load-bearing layer fixedly connected to the surface of the base reinforcement layer, a hardening layer fixedly connected to the surface of the pressure-resistant load-bearing layer, and a surface wear-resistant and pressure-resistant layer fixedly connected to the surface of the hardening layer.
[0008] The present invention is further configured such that the surface of the inner ring is provided with threads, and the opposite sides of the two sealing rings are provided with limiting grooves for use with the inner rings. The threads on the surface of the inner rings enable the two inner rings to be connected to each other, and the two sealing rings are installed on the top and bottom of the outer ring. The limiting grooves enable the outer ring or the inner ring to rotate.
[0009] The present invention is further configured such that an oil injection hole is provided on the left side of the top of the outer ring, and a sealing post is threadedly connected to the inside of the oil injection hole. The oil injection hole can inject lubricating oil into the inside of the outer ring. The surface of the sealing post is threadedly connected to the inner wall of the oil injection hole, which can seal the oil injection hole. An internal hexagonal disassembly hole is provided on the top of the sealing post, which facilitates the disassembly and assembly of the sealing post.
[0010] The present invention is further configured such that the material of the bearing substrate layer is ultra-clean high-carbon chromium steel, and the material of the hardened layer is high-temperature bearing steel. Ultra-clean high-carbon chromium steel serves as the main substrate material of the bearing outer ring, providing an overall load-bearing foundation. High-temperature bearing steel can provide excellent high-temperature hardness and thermal stability, preventing the subsurface area from softening under heavy load temperature rise and inhibiting the spread of plastic deformation to deeper layers.
[0011] The present invention is further configured such that the material of the surface wear-resistant and pressure-resistant layer is silicon nitride ceramic, and the matrix reinforcement layer and the bearing matrix layer are connected by vacuum diffusion welding and hot isostatic pressing composite process. Silicon nitride ceramic can provide extremely high surface hardness and wear resistance, directly resist the crushing and contact stress of hard particles, and effectively prevent indentations and pits from forming on the raceway surface.
[0012] The present invention is further configured such that the matrix reinforcement layer includes a high-purity carburized steel layer, and a high-carbon chromium bearing steel layer is fixedly connected to the surface of the high-purity carburized steel layer. The high-purity carburized steel layer can improve the rigidity of the matrix support and effectively block fatigue cracks caused by internal defects. The high-carbon chromium bearing steel layer has high yield strength and compressive strength, bears most of the contact load, and resists plastic deformation in the raceway area.
[0013] The present invention is further configured such that the compressive load-bearing layer includes a martensitic aging steel layer, and a surface carburized steel layer is fixedly connected to the surface of the martensitic aging steel layer. The martensitic aging steel layer has a high elastic modulus and good fracture toughness. It releases local stress through reversible elastic deformation, assists in the recovery of the raceway shape after unloading, reduces the accumulation of residual stress, and the surface carburized steel layer can form a tough support base, absorb impact energy, prevent brittle cracks in the surface ceramic from propagating downwards, and provide necessary deformation buffer.
[0014] The present invention has the following beneficial effects.
[0015] 1. This utility model utilizes the outer ring and a surface wear-resistant and pressure-resistant layer to directly resist the crushing and contact stress of external hard particles, preventing indentations or pits from forming on the raceway. The hardened layer inhibits the spread of plastic deformation to deeper layers, and the pressure-resistant load-bearing layer releases local stress through reversible elastic deformation, assisting the raceway in quickly restoring its shape after unloading. The surface carburized steel layer forms a tough base to absorb impact energy and prevent the ceramic layer from cracking downwards. The matrix reinforcement layer blocks fatigue cracks caused by internal defects, and the bearing matrix layer provides a stable load-bearing foundation, all of which together improve damage resistance and service life.
[0016] 2. This utility model uses a sealing component to connect two inner ring threads to compress the sealing ring, sealing the gap between the outer and inner rings. This effectively prevents external hard particles from intruding into the lubricating medium. Combined with the oil injection hole for regular replenishment of lubricating oil, the raceway is kept clean and lubricated, preventing external hard particles from entering the inner ring and causing wear on the raceway during bearing operation, thus extending the bearing's service life. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.
[0018] Figure 1 A three-dimensional diagram of a high-strength, durable bearing;
[0019] Figure 2 This is a cross-sectional view of the outer ring of a high-strength, durable bearing.
[0020] Figure 3 A cross-sectional view of a sealing component in a high-strength, durable bearing;
[0021] Figure 4 This is a schematic diagram of the outer ring material composition in a high-strength, durable bearing.
[0022] Figure 5 This is a schematic diagram of the composition of the matrix reinforcement layer material in a high-strength, damage-resistant bearing.
[0023] Figure 6 This is a schematic diagram of the composition of the compressive load-bearing layer material in a high-strength, durable bearing.
[0024] In the attached diagram: 1. Outer ring; 2. Cage; 3. Ball; 4. Sealing assembly; 41. Inner ring; 42. Sealing ring; 11. Bearing base layer; 12. Base reinforcement layer; 13. Compressive load-bearing layer; 14. Hardened layer; 15. Surface wear-resistant and compressive-resistant layer; 5. Oil injection hole; 6. Sealing post; 121. High-purity carburized steel layer; 122. High-carbon chromium bearing steel layer; 131. Martensitic aging steel layer; 132. Surface carburized steel layer. Detailed Implementation
[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0026] Example 1
[0027] Please see Figure 1-6 This utility model is a high-strength and durable bearing, including an outer ring 1. A sealing component 4 is provided on the inner wall of the outer ring 1. A retainer 2 is fitted on the surface of the sealing component 4. A ball 3 is slidably connected inside the retainer 2. The sealing component 4 includes two inner rings 41. The opposite sides of the two inner rings 41 extend into the interior of the outer ring 1 and are threaded together. Sealing rings 42 are provided at the top and bottom of the outer ring 1. The opposite sides of the two sealing rings 42 are slidably connected to the inner rings 41. The outer ring 1 includes a bearing base layer 11. A base reinforcement layer 12 is fixedly connected to the surface of the bearing base layer 11. A pressure-resistant load-bearing layer 13 is fixedly connected to the surface of the base reinforcement layer 12. A hardening layer 14 is fixedly connected to the surface of the pressure-resistant load-bearing layer 13. A surface wear-resistant and pressure-resistant layer 15 is fixedly connected to the surface of the hardening layer 14.
[0028] Specifically: the two inner rings 41 can be connected to each other by threads. After the two inner rings 41 are connected to each other, they continue to compress the sealing ring 42, so that the two sealing rings 42 block the gap between the inner ring 41 and the outer ring 1, preventing hard particles from entering the interior of the outer ring 1 and avoiding wear on the inner raceway of the outer ring 1, which reduces its service life. The bearing base layer 11 can provide an overall load-bearing foundation and optimize the balance between cost and performance. The base reinforcement layer 12 can improve the rigidity of the base support and block fatigue cracks caused by internal defects. The pressure-resistant load-bearing layer 13 can release local stress through reversible elastic deformation and assist the surface layer in restoring its shape after unloading. The hardening layer 14 can inhibit the spread of deformation to the deeper layers and improve high-temperature stability. The surface wear-resistant and pressure-resistant layer 15 can directly resist the crushing of hard particles, inhibit the formation of indentations, and reduce rolling friction energy consumption.
[0029] Example 2
[0030] Please see Figure 1-6Based on Embodiment 1, the inner ring 41 has threads on its surface, and the two sealing rings 42 have limiting grooves on opposite sides that cooperate with the inner ring 41. The outer ring 1 has an oil injection hole 5 on the left side of its top, and the oil injection hole 5 is internally threaded with a sealing post 6. The bearing base layer 11 is made of ultra-clean high-carbon chromium steel, the hardened layer 14 is made of high-temperature bearing steel, and the surface wear-resistant and pressure-resistant layer 15 is made of silicon nitride ceramic. The base reinforcement layer 12 and the bearing base layer 11 are connected by vacuum diffusion welding and hot isostatic pressing composite process. The base reinforcement layer 12 includes a high-purity carburized steel layer 121, and a high-carbon chromium bearing steel layer 122 is fixedly connected to the surface of the high-purity carburized steel layer 121. The pressure-resistant and load-bearing layer 13 includes a maraging steel layer 131, and a surface carburized steel layer 132 is fixedly connected to the surface of the maraging steel layer 131.
[0031] Specifically: the threads on the surface of the inner ring 41 allow the two inner rings 41 to connect with each other, and the two sealing rings 42 are installed on the top and bottom of the outer ring 1. The limiting groove facilitates the rotation of the outer ring 1 or the inner ring 41. The oil injection hole 5 allows lubricating oil to be injected into the outer ring 1. The surface of the sealing post 6 is threaded to the inner wall of the oil injection hole 5, which can seal the oil injection hole 5. The top of the sealing post 6 has an internal hexagonal socket for easy installation and removal. Ultra-clean high-carbon chromium steel is used as the main body material of the bearing outer ring 1, providing an overall load-bearing foundation. High-temperature bearing steel can provide excellent high-temperature hardness and thermal stability, preventing softening of the subsurface area under heavy load temperature rise and inhibiting the spread of plastic deformation to deeper layers. Silicon nitride ceramic can improve... It provides extremely high surface hardness and wear resistance, directly resisting the crushing and contact stress of hard particles, effectively preventing indentations and pits on the raceway surface. The high-purity carburized steel layer 121 can improve the rigidity of the matrix support and effectively block fatigue cracks caused by internal defects. The high-carbon chromium bearing steel layer 122 has high yield strength and compressive strength, bearing most of the contact load and resisting plastic deformation in the raceway area. The martensitic aging steel layer 131 has high elastic modulus and good fracture toughness, releasing local stress through reversible elastic deformation, assisting in the recovery of the raceway shape after unloading, and reducing the accumulation of residual stress. The surface carburized steel layer 132 can form a tough support substrate, absorb impact energy, prevent brittle cracks in the surface ceramic from propagating downwards, and provide necessary deformation buffer.
[0032] The working principle of this utility model is as follows: rotating the two inner rings 41 causes them to compress the sealing ring 42, which in turn prevents external impurities from entering the raceway area inside the outer ring 1. The balls 3 roll along the raceway of the outer ring 1 under the guidance of the cage 2, avoiding wear on the raceway caused by external hard particles and improving the service life of the bearing. The wear-resistant and pressure-resistant surface layer 15 directly resists the crushing and contact stress of hard particles with ultra-high hardness, preventing the formation of surface indentations. The hardened layer 14 maintains high-temperature stability and inhibits the softening deformation of the subsurface. The martensitic aging steel layer 131 in the pressure-resistant load-bearing layer 13 releases local concentrated stress through elastic deformation, assisting the raceway to recover its shape after unloading. The surface carburized steel layer 132 absorbs impact energy and buffers the stress of the ceramic layer, blocking the propagation of brittle cracks. The high-purity carburized steel layer 121 of the matrix reinforcement layer 12 improves the rigidity of the matrix. The high-carbon chromium bearing steel layer 122 bears the main load and resists plastic deformation. The bearing matrix layer 11 provides an overall support foundation. The high-strength damage resistance function is achieved by utilizing the synergistic effect of multiple materials.
[0033] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.
Claims
1. A high-strength, durable bearing, comprising an outer ring (1), characterized in that: The inner wall of the outer ring (1) is provided with a sealing component (4), and a retainer (2) is sleeved on the surface of the sealing component (4). A ball bearing (3) is slidably connected inside the retainer (2). The sealing assembly (4) includes two inner rings (41), with one side of each inner ring (41) extending into the interior of the outer ring (1). The two inner rings (41) are threaded together on the opposite side. The top and bottom of the outer ring (1) are provided with sealing rings (42), and the opposite sides of the two sealing rings (42) are slidably connected to the inner rings (41). The outer ring (1) includes a bearing base layer (11), a base reinforcement layer (12) is fixedly connected to the surface of the bearing base layer (11), a pressure-resistant load-bearing layer (13) is fixedly connected to the surface of the base reinforcement layer (12), a hardening layer (14) is fixedly connected to the surface of the pressure-resistant load-bearing layer (13), and a surface wear-resistant and pressure-resistant layer (15) is fixedly connected to the surface of the hardening layer (14).
2. The high-strength, damage-resistant bearing according to claim 1, characterized in that: The inner ring (41) has a threaded surface, and the two sealing rings (42) have a limiting groove on opposite sides that cooperates with the inner ring (41).
3. The high-strength, damage-resistant bearing according to claim 1, characterized in that: An oil injection hole (5) is provided on the left side of the top of the outer ring (1), and a sealing post (6) is threaded inside the oil injection hole (5).
4. The high-strength, damage-resistant bearing according to claim 1, characterized in that: The material of the bearing substrate layer (11) is ultra-clean high-carbon chromium steel, and the material of the hardened layer (14) is high-temperature bearing steel.
5. A high-strength, damage-resistant bearing according to claim 1, characterized in that: The surface wear-resistant and pressure-resistant layer (15) is made of silicon nitride ceramic, and the substrate reinforcement layer (12) and the bearing substrate layer (11) are connected by vacuum diffusion welding and hot isostatic pressing composite process.
6. A high-strength, damage-resistant bearing according to claim 1, characterized in that: The substrate reinforcement layer (12) includes a high-purity carburized steel layer (121), and a high-carbon chromium bearing steel layer (122) is fixedly connected to the surface of the high-purity carburized steel layer (121).
7. A high-strength, damage-resistant bearing according to claim 1, characterized in that: The compressive load-bearing layer (13) includes a martensitic aging steel layer (131), and a surface carburized steel layer (132) is fixedly connected to the surface of the martensitic aging steel layer (131).