High-efficiency wear-resistant bearing with integrated heat dissipation channel

Abstract

The utility model provides a kind of high-efficiency wear-resistant bearing with integrated heat dissipation channel, it relates to bearing processing field, by the annular heat dissipation channel and built-in heat dissipation fin of two ends through integration processing ring in bearing outer ring side wall, substantially shorten heat transfer path and increase heat exchange area, effectively reduce bearing operating temperature, delay grease aging;Roller surface uses thick tungsten carbide wear-resistant coating significantly reduce wear rate;Anti-skid spline groove of bearing inner ring inner wall and spline structure of assembled shaft are accurately engaged, realize circumferential reliable fixing and facilitate dismounting, avoid relative sliding to stabilize transmission torque;Both reduce the heat source of friction and quickly export heat, so that bearing has the comprehensive advantage of high-efficiency heat dissipation, long-wearing, torque transmission stability, compact structure and strong adaptability, can substantially extend the service life of bearing more than 1.5 times, can stably adapt to metallurgy, mine and other heavy load, high speed, high wear and other harsh working conditions, improve the continuous operation ability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing, and in particular to a high-efficiency wear-resistant bearing with an integrated heat dissipation channel. Background Technology

[0002] As a core basic component of mechanical equipment, bearings play a crucial role in supporting the operation of shaft systems and transmitting loads. They are widely used in heavy-load, high-speed, and high-wear conditions such as metallurgical rolling mills, mining crushers, and slewing bearings of construction machinery.

[0003] Under the aforementioned harsh operating conditions, the bearing will generate a large amount of heat due to the friction between the rollers and the raceway during operation. If the heat cannot be dissipated in time, the bearing temperature will rise, which will not only accelerate the aging and failure of the lubricating grease, but also cause thermal deformation of the bearing components, affecting the operating accuracy. At the same time, the continuous friction between the rollers and the raceway can easily cause surface wear and peeling, which will significantly shorten the service life of the bearing.

[0004] To address these issues, existing technologies typically employ external heat dissipation devices, such as cooling fans, water-cooling jackets, or spraying wear-resistant coatings onto the roller surface to optimize bearing performance. However, existing wear-resistant bearings often use spraying or electroplating processes for their roller coatings, resulting in weak adhesion between the coating and the roller substrate. Under heavy impact loads, the coating is prone to peeling and cracking. Furthermore, the thickness control precision of some coatings is low; excessively thick coatings affect the fit between the roller and the raceway, while excessively thin coatings fail to provide effective wear protection. Simultaneously, the high surface roughness of the coating exacerbates raceway friction and wear, ultimately reducing the overall operational stability of the bearing. These technologies suffer from complex structures, poor adaptability, and limited effectiveness, failing to meet the comprehensive requirements of high-end equipment for efficient heat dissipation, durable wear resistance, and compact structure in bearings.

[0005] Therefore, there is an urgent need to develop an integrated heat dissipation and wear-resistant bearing structure. Utility Model Content

[0006] The purpose of this invention is to provide a high-efficiency wear-resistant bearing with an integrated heat dissipation channel. Through the synergistic design of the heat dissipation channel and the wear-resistant coating, the source of frictional heat generation is reduced and heat is quickly dissipated, giving the bearing the comprehensive advantages of high-efficiency heat dissipation, durable wear resistance, and stable torque transmission. The structure is compact and highly adaptable, which can significantly extend the service life of the bearing by more than 1.5 times. It can stably adapt to the harsh working conditions of heavy load, high speed, and high wear in metallurgy, mining, etc., and improve the continuous operation capability of equipment.

[0007] To achieve the above objectives, this utility model provides a high-efficiency wear-resistant bearing with an integrated heat dissipation channel, comprising an inner bearing ring, an outer bearing ring, rollers, and a cage disposed within an annular cavity formed by the inner and outer bearing rings. An annular heat dissipation channel is provided on the side wall of the outer bearing ring, with both ends of the channel communicating with the end faces of the outer bearing ring. Heat dissipation fins are provided on the inner wall of the annular heat dissipation channel. The cage has pockets that enclose the rollers, and the outer spherical surface of the rollers contacts the raceway of the outer bearing ring.

[0008] Preferably, the cross-section of the annular heat dissipation channel is rectangular, and the width of the rectangle is set to the thickness of the outer ring wall of the bearing. ~ .

[0009] Preferably, the heat dissipation fins are evenly arranged circumferentially along the annular heat dissipation channel, and the included angle between two adjacent heat dissipation fins is 15°-20°.

[0010] Preferably, the roller surface is provided with a tungsten carbide wear-resistant coating, the thickness of the tungsten carbide wear-resistant coating is set at 0.05mm-0.1mm, and the surface roughness Ra of the tungsten carbide wear-resistant coating is ≤0.8μm.

[0011] Preferably, the inner wall of the bearing inner ring is provided with an anti-slip spline groove, which extends axially along the bearing inner ring and engages with the spline structure of the assembly shaft.

[0012] Preferably, the outer diameter of the cage is smaller than the inner diameter of the outer ring of the bearing, and the inner diameter of the cage is larger than the outer diameter of the inner ring of the bearing.

[0013] Therefore, the present invention employs the aforementioned high-efficiency wear-resistant bearing with an integrated heat dissipation channel, and the technical effects are as follows: (1) This utility model integrates the heat dissipation channel and the high reliability wear-resistant coating in a coordinated design. The heat dissipation channel can quickly dissipate the heat generated by the friction between the coating and the raceway, and avoid the coating from softening and failing due to high temperature. The wear-resistant coating reduces the source of frictional heat generation. The two complement each other, so that the bearing has both efficient heat dissipation and durable wear resistance. It can stably adapt to the harsh working conditions of heavy load, high speed and high wear in metallurgy, mining and other industries, and improve the continuous operation capability of the equipment.

[0014] (2) In this utility model, the anti-slip spline groove provided along the axial direction on the inner wall of the bearing inner ring can precisely mesh with the spline structure of the shaft, realize the reliable circumferential fixation of the inner ring and the shaft, completely avoid the relative sliding between the two during operation, and ensure the stability of torque transmission; at the same time, the spline groove connection is more convenient to disassemble and assemble than the traditional interference fit, reducing the maintenance cost of the bearing.

[0015] (3) The tungsten carbide wear-resistant coating on the roller surface of this utility model is prepared by plasma cladding process. The coating and the substrate achieve metallurgical bonding with strong adhesion, and it is not easy to fall off or crack under heavy impact load. The coating thickness is precisely controlled at 0.05-0.1mm, and the surface roughness Ra≤0.8μm, which not only ensures excellent wear resistance and impact resistance, but also does not affect the fitting accuracy between the roller and the raceway. This coating can improve the wear resistance of the roller by 2-3 times, significantly reduce the wear rate between the roller and the raceway, and extend the overall service life of the bearing by more than 1.5 times.

[0016] (4) This utility model has an annular heat dissipation channel machined on the side wall of the bearing outer ring, and the two ends of the channel penetrate the axial end face of the outer ring to form an air convection channel, which can directly cool the bearing outer ring and shorten the heat transfer path; the heat dissipation fins set on the inner wall of the channel increase the heat exchange area and further enhance the heat dissipation effect. This integrated structure does not require additional heat dissipation accessories, has a compact structure, and strong adaptability. Compared with the traditional external heat dissipation method, the heat dissipation efficiency is improved by more than 40%, which can effectively reduce the bearing operating temperature, delay the aging of grease, and extend the bearing thermal stability operation time. Attached Figure Description

[0017] Figure 1 This is a diagram of the device for the high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to this utility model.

[0018] Attached image captions: 1. Bearing outer ring; 2. Annular heat dissipation channel; 3. Heat dissipation fins; 4. Roller; 5. Cage; 6. Bearing inner ring; 7. Spline groove. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1 like Figure 1As shown, this utility model provides a high-efficiency wear-resistant bearing with an integrated heat dissipation channel, including an inner bearing ring 6, an outer bearing ring 1, rollers 4, and a cage 5 disposed within an annular cavity formed by the inner bearing ring 6 and the outer bearing ring 1. An anti-slip spline groove 7 is provided on the inner wall of the inner bearing ring 6, extending axially along the inner bearing ring 6 and engaging with the spline structure of the mounting shaft; this achieves reliable circumferential fixation between the inner ring and the shaft, completely preventing relative sliding between the inner bearing ring 6 and the mounting shaft during operation, ensuring the stability of torque transmission; simultaneously, the spline groove 7 connection offers superior ease of assembly and disassembly compared to traditional interference fits, reducing bearing maintenance costs. An annular heat dissipation channel 2 is provided on the side wall of the outer bearing ring 1, the cross-section of which is rectangular, and the width of the rectangle is set to the thickness of the outer bearing ring 1. ~ The annular heat dissipation channel 2 is connected to the end face of the outer ring 1 of the bearing at both ends. Heat dissipation fins 3 are provided on the inner wall of the annular heat dissipation channel 2. The heat dissipation fins 3 are evenly distributed circumferentially along the annular heat dissipation channel 2, with an included angle of 15°-20° between adjacent heat dissipation fins 3. The outer diameter of the cage 5 is smaller than the inner diameter of the outer ring 1 of the bearing, while the inner diameter of the cage 5 is larger than the outer diameter of the inner ring 6 of the bearing. The cage 5 has pockets that enclose rollers 4, with the outer spherical surface of the rollers 4 contacting the raceway of the outer ring 1 of the bearing. The surface of the rollers 4 is coated with a tungsten carbide wear-resistant coating. The thickness of the tungsten carbide wear-resistant coating is set at 0.05mm-0.1mm, and the surface roughness Ra of the tungsten carbide wear-resistant coating is ≤0.8μm. The coating achieves metallurgical bonding with the substrate, resulting in strong adhesion and resistance to peeling and cracking under heavy impact loads. The thickness and surface roughness of the coating ensure excellent wear resistance and impact resistance without affecting the fitting accuracy between the rollers 4 and the raceway. This coating can improve the wear resistance of roller 4 by 2-3 times, significantly reduce the wear rate between roller 4 and raceway, and extend the overall service life of the bearing by more than 1.5 times.

[0022] The following research was conducted on the performance and service life of the rollers: Roller substrates are typically made of bearing steel (such as GCr15), with a hardness of approximately HRC60-62. Plasma-clad tungsten carbide coatings, however, can achieve a hardness of HRC75-80, representing an increase of over 20%. According to wear theory, material hardness is positively correlated with wear resistance; higher hardness translates to stronger resistance to adhesive and abrasive wear. Furthermore, the dense microstructure of the tungsten carbide coating eliminates the porosity defects found in ordinary spray coatings, resulting in a metallurgical bond strength (≥50MPa) far exceeding that of traditional spray coatings (≤20MPa). This prevents secondary wear caused by coating detachment, theoretically achieving a 2-3 times improvement in wear resistance.

[0023] The basis for the comparative test data: The comparison test under the same working conditions was used as the basis: a conventional bearing of the same model (without tungsten carbide coating) and the bearing of this application were selected for bench test. The test conditions were: radial load 200kN, speed 1500r / min, lubrication method grease lubrication, and continuous operation time 1000 hours.

[0024] The wear on the surface of conventional bearing rollers is about 0.12 mm, and obvious scratches appear on the raceway; the wear on the surface of the bearing rollers in this application is only 0.03-0.06 mm, and there is no obvious damage to the raceway surface. The wear resistance is improved by 2 to 4 times, and the middle value is 2 to 3 times.

[0025] Conventional bearings fail after 1200 hours of operation due to excessive roller wear; the bearings in this application still meet the accuracy requirements after 1800 hours of operation, extending their service life by more than 1.5 times.

[0026] Practical basis for working condition adaptability: In the actual application of mining crushers, there is a large amount of dust and impact load during equipment operation. The average service life of conventional bearings is about 6 months. The bearings of this application have a wear-resistant coating and heat dissipation channels that can reduce temperature rise. Under the same working conditions, the average service life can reach 9 to 10 months, which verifies the conclusion that the service life is extended by more than 1.5 times.

[0027] Therefore, this utility model adopts the above-mentioned high-efficiency wear-resistant bearing with integrated heat dissipation channel. Through the synergistic design of heat dissipation channel and wear-resistant coating, it reduces the source of frictional heat generation and quickly dissipates heat, giving the bearing the comprehensive advantages of high-efficiency heat dissipation, durable wear resistance and stable torque transmission. It has a compact structure and strong adaptability, which can significantly extend the service life of the bearing by more than 1.5 times. It can stably adapt to the harsh working conditions of heavy load, high speed and high wear in metallurgy, mining and other industries, and improve the continuous operation capability of equipment.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A high-efficiency wear-resistant bearing with an integrated heat dissipation channel, characterized in that, The bearing includes an inner ring, an outer ring, rollers, and a cage disposed within an annular cavity formed by the inner and outer rings. An annular heat dissipation channel is provided on the side wall of the outer ring, and both ends of the annular heat dissipation channel are connected to the end faces of the outer ring. Heat dissipation fins are provided on the inner wall of the annular heat dissipation channel. The cage is provided with pockets that enclose the rollers, and the outer spherical surface of the rollers contacts the raceway of the outer ring.

2. The high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to claim 1, characterized in that, The annular heat dissipation channel has a rectangular cross-section, and the width of the rectangle is set to the thickness of the outer ring wall of the bearing. ~ .

3. The high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to claim 1, characterized in that: The heat dissipation fins are evenly arranged around the annular heat dissipation channel, and the included angle between two adjacent heat dissipation fins is 15°-20°.

4. The high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to claim 1, characterized in that: The roller surface is provided with a tungsten carbide wear-resistant coating, the thickness of which is set between 0.05mm and 0.1mm, and the surface roughness Ra of which is ≤0.8μm.

5. The high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to claim 1, characterized in that: The inner wall of the bearing inner ring is provided with an anti-slip spline groove, which extends axially along the bearing inner ring and engages with the spline structure of the assembly shaft.

6. The high-efficiency wear-resistant bearing with an integrated heat dissipation channel according to claim 1, characterized in that: The outer diameter of the cage is smaller than the inner diameter of the outer ring of the bearing, and the inner diameter of the cage is larger than the outer diameter of the inner ring of the bearing.

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