Self-lubricating bearing

Abstract

This invention provides a self-lubricating bearing, comprising: an outer bearing ring forming the external support structure of the bearing; a self-lubricating bushing fixedly disposed on the inner surface of the outer bearing ring; a cage disposed inside the self-lubricating bushing; a plurality of rolling elements evenly spaced and supported by the cage; a sealing device disposed at both ends of the bearing; and end caps connected to the outer bearing ring and providing axial positioning. The self-lubricating bushing contains a solid lubricant, capable of continuously providing lubrication to the friction surfaces during operation. This invention, employing the aforementioned self-lubricating bearing, can operate stably within a wide temperature range (-100℃ to 300℃), achieving controlled release of the lubricant and automatically adjusting the lubricant supply according to changes in operating conditions. While ensuring good lubrication performance, it also possesses high load-bearing capacity (dynamic load density ≥200 N / mm²). 2 ) and long service life (L10 life ≥ 10,000 hours).

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a self-lubricating bearing. Background Technology

[0002] In modern mechanical equipment, bearings are core fundamental components, and their performance directly affects the overall efficiency, service life, and reliability of the equipment. Traditional rolling bearings mainly rely on external lubrication systems to provide lubricating oil or grease to maintain normal operation. This lubrication method has the following inherent drawbacks: Lubricant consumption issue: Lubricating oil or grease is continuously consumed and oxidized during operation, requiring regular replenishment or replacement. In continuous production equipment, downtime for maintenance can result in significant economic losses.

[0003] Poor environmental adaptability: In high-temperature environments (such as metallurgical equipment and engine systems), traditional lubricants are prone to oxidation and failure; in low-temperature environments (such as polar equipment and spacecraft), the viscosity of the lubricant increases, leading to difficulty in starting; in vacuum environments (such as space equipment), the lubricant will evaporate and contaminate optical components.

[0004] Contamination risk: Lubricant leakage may contaminate products, especially in industries with high cleanliness requirements such as food processing, pharmaceutical production, and electronics manufacturing, where this risk is particularly prominent.

[0005] Structural complexity: External lubrication systems require supporting equipment such as oil lines, pump stations, and cooling devices, which increases the complexity of the system and the potential for failure. Utility Model Content

[0006] The purpose of this invention is to provide a self-lubricating bearing that can operate stably within a wide temperature range (-100℃ to 300℃), achieves controlled release of lubricant, and automatically adjusts the lubricant supply according to changes in operating conditions. While ensuring good lubrication performance, it also possesses high load-bearing capacity (dynamic load density ≥200N / mm²). 2 ) and long service life (L10 life ≥ 10,000 hours).

[0007] To achieve the above objectives, this utility model provides a self-lubricating bearing, comprising: The outer ring of the bearing constitutes the external support structure of the bearing; A self-lubricating bushing is fixedly installed on the inner surface of the outer ring of the bearing; A retainer is disposed inside the self-lubricating bushing; Multiple rolling elements are evenly spaced and supported by the cage; Sealing devices are installed at both ends of the bearing; End cap, which connects to the outer ring of the bearing and provides axial positioning; The inner ring is located inside the cage. The self-lubricating bushing contains a solid lubricant that can continuously provide lubrication to the friction surfaces during operation.

[0008] Preferably, the self-lubricating bushing is made of a metal-based composite material, a polymer-based composite material, or a porous metal-impregnated lubricant material.

[0009] Preferably, the metal-based composite material is a copper-based alloy with added graphite and / or molybdenum disulfide solid lubricant.

[0010] Preferably, the cage is provided with a first support layer and a second support layer, the first support layer is fixedly connected to the first support layer, the first support layer is provided with a plurality of first positioning holes on one side of the bearing outer ring, and the second support layer is provided with a second positioning hole on the side, the second positioning hole and the first positioning hole are distributed at intervals.

[0011] Preferably, the rolling element is located in the first positioning hole and the second positioning hole, and the rolling element in the first positioning hole is tangent to the rolling element in the second positioning hole.

[0012] Preferably, the rolling element is a ball, a cylindrical roller, or a needle roller.

[0013] Preferably, the sealing device is a contact seal or a non-contact seal, and is made of rubber, polyurethane or PTFE material.

[0014] Preferably, the end cap is connected to the outer ring of the bearing by bolts or press-fitting.

[0015] Preferably, the inner surface of the self-lubricating bushing is provided with a lubricant storage groove or a porous structure.

[0016] Preferably, the outer surface of the bearing outer ring is provided with a mounting and positioning structure.

[0017] Therefore, the present invention employs the above-mentioned self-lubricating bearing, and the technical effects are as follows: Maintenance-free operation: Long-term maintenance-free operation is achieved by continuously releasing solid lubricant through self-lubricating bushings; Environmental adaptability: Suitable for special working conditions such as high temperature, low temperature, and vacuum; Pollution-free: Avoids lubricant leakage and pollution, meeting the requirements of the food, pharmaceutical and other industries; Compact structure: Integrated design, easy installation, and high reliability; Economic benefits: Reduced maintenance costs and extended service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a self-lubricating bearing according to the present invention.

[0019] Figure Labels 1. Bearing outer ring; 2. Self-lubricating bushing; 3. Cage; 4. Rolling elements; 5. Sealing device; 6. End cap; 7. Bearing inner ring. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] 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.

[0022] Example 1 like Figure 1 As shown, a self-lubricating bearing of the present invention includes an outer ring 1 and an inner ring 7, both made of 45# steel. The outer surface is machined with a mounting flange, which is interference-fitted with the equipment housing. The inner surface is machined with a sealing groove and an end cap mounting threaded hole.

[0023] The self-lubricating bushing 2 is made of copper-based graphite composite material and is fixed to the inner surface of the bearing outer ring 1 by press fitting. The inner surface of the bushing is machined with tiny lubricant storage grooves to enhance the lubrication effect.

[0024] The cage 3 is injection molded from nylon material and has a uniformly distributed pocket structure for separating the rolling elements.

[0025] The rolling element 4 is a ball made of GCr15 bearing steel with a polished surface to ensure smooth movement.

[0026] The sealing device 5 uses a contact-type sealing ring made of nitrile rubber, which is press-fitted into the sealing groove of the outer ring of the bearing.

[0027] End cap 6 is made of Q235 steel and is connected to the outer ring of the bearing by bolts, providing axial positioning and auxiliary sealing.

[0028] The cage 3 is provided with a first support layer and a second support layer. The first support layer is fixedly connected to the first support layer. The first support layer is provided with a plurality of first positioning holes on one side of the bearing outer ring. The second support layer is provided with a second positioning hole on the side. The second positioning holes and the first positioning holes are distributed at intervals.

[0029] The rolling element 4 is located in the first positioning hole and the second positioning hole, and the rolling element 4 in the first positioning hole is tangent to the rolling element 4 in the second positioning hole.

[0030] During assembly, first press the self-lubricating bushing 2 into the outer ring 1 of the bearing, then install the rolling element 4 into the pocket of the cage 3, then place the assembled cage-rolling element assembly into the bearing, and finally install the sealing device 5 and the end cover 6.

[0031] During operation, the solid lubricant in the self-lubricating bushing is gradually released under frictional heat and pressure, forming a stable transfer film on the shaft surface to achieve continuous and effective lubrication. The sealing device prevents external contaminants from entering, ensuring long-term reliable bearing operation.

[0032] Performance test results A series of performance tests were conducted on the manufactured bearing samples, and the results are as follows: Life test: under a load of 150 N / mm 2 At a speed of 3000 r / min, the L10 lifespan reached 12500 hours, exceeding the design target.

[0033] Temperature rise test: under extreme conditions (load 200 N / mm) 2 At a speed of 5000 r / min, the stable operating temperature is 85℃, with a temperature rise of 45K.

[0034] Friction coefficient: The friction coefficient ranges from 0.06 to 0.10 under different working conditions, showing stable performance.

[0035] Sealing performance: After 1000 hours of operation in a dusty environment, the internal cleanliness remains unchanged.

[0036] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0037] Therefore, this utility model adopts the above-mentioned self-lubricating bearing, which is maintenance-free, highly adaptable to the environment, and has a compact structure.

[0038] 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 self-lubricating bearing, characterized in that, include: The outer ring of the bearing constitutes the external support structure of the bearing; A self-lubricating bushing is fixedly installed on the inner surface of the outer ring of the bearing; A retainer is disposed inside the self-lubricating bushing; Multiple rolling elements are evenly spaced and supported by the cage; Sealing devices are installed at both ends of the bearing; End cap, which connects to the outer ring of the bearing and provides axial positioning; The inner ring is located inside the cage. The self-lubricating bushing contains a solid lubricant that can continuously provide lubrication to the friction surfaces during operation.

2. The self-lubricating bearing according to claim 1, characterized in that, The self-lubricating bushing is made of metal-based composite material, polymer-based composite material, or porous metal-impregnated lubricant material.

3. A self-lubricating bearing according to claim 1, characterized in that, The cage is provided with a first support layer and a second support layer. The first support layer is fixedly connected to the first support layer. The first support layer is provided with a plurality of first positioning holes on one side of the outer ring of the bearing. The second support layer is provided with a second positioning hole on the side. The second positioning hole and the first positioning hole are distributed at intervals.

4. A self-lubricating bearing according to claim 3, characterized in that, The rolling element is located in the first positioning hole and the second positioning hole, and the rolling element in the first positioning hole is tangent to the rolling element in the second positioning hole.

5. A self-lubricating bearing according to claim 1, characterized in that, The self-lubricating bushing is fixed to the inner surface of the bearing outer ring by press fitting or bonding.

6. A self-lubricating bearing according to claim 1, characterized in that, The rolling element is a ball, a cylindrical roller, or a needle roller.

7. A self-lubricating bearing according to claim 1, characterized in that, The sealing device is a contact seal or a non-contact seal, and is made of rubber, polyurethane or PTFE materials.

8. A self-lubricating bearing according to claim 1, characterized in that, The end cap is connected to the outer ring of the bearing by bolts or press-fitting.

9. A self-lubricating bearing according to claim 1, characterized in that, The inner surface of the self-lubricating bushing is provided with a lubricant storage groove or pore structure.

10. A self-lubricating bearing according to claim 1, characterized in that, The outer surface of the bearing outer ring is provided with a mounting and positioning structure.

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