A high-speed bearing

Abstract

This invention provides a high-speed bearing, comprising a first rotating shaft, a first bearing assembly, a second bearing assembly, and a bearing housing. The inner ring of the first bearing assembly rotates synchronously with the first rotating shaft, and the outer ring of the first bearing assembly rotates synchronously with the inner ring of the second bearing assembly. The outer ring of the second bearing assembly is connected to the bearing housing. A plurality of first permanent magnets are uniformly arranged circumferentially on the first rotating shaft, and a plurality of second permanent magnets are uniformly arranged circumferentially on the outer ring of the first bearing assembly. A plurality of magnetic conductors are uniformly arranged circumferentially on the inner wall of the bearing housing. Each magnetic conductor includes a U-shaped deflection portion. One side wall of the oppositely arranged side wall of the U-shaped deflection portion corresponds to the position of a first permanent magnet, and the other side wall corresponds to the position of a second permanent magnet. This invention provides a high-speed bearing that uses the U-shaped deflection portion of the magnetic conductor to redirect the magnetic field, causing the inner ring of the second bearing assembly to rotate in the same direction as the first rotating shaft. This increases the upper limit of the power input speed that the bearing can withstand, without reducing its lifespan. It also features low production costs and a wide range of applications.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a high-speed bearing. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.

[0003] Rolling bearings generally consist of four parts: an outer ring, an inner ring, rolling elements, and a cage. When the bearing rotates, there is rolling friction between the rolling elements and the outer and inner rings. The higher the speed, the greater the friction loss. Therefore, each bearing has its upper speed limit. Exceeding the upper speed limit will greatly reduce the bearing's lifespan and increase the company's operating costs.

[0004] Due to frictional losses during the rotation of a single bearing, each bearing has an upper limit on its rotational speed. Let's assume this upper limit is 90,000 revolutions per minute (RPM). By using two or more bearings in series, when the inner ring of one bearing rotates under the drive of the power mechanism, the remaining bearings rotate in the same direction due to friction. If the power input mechanism has a speed of 100,000 RPM, and assuming one bearing rotates at 50,000 RPM, then the other bearing will also rotate at 50,000 RPM. Both bearings operate within their acceptable speed range. Compared to a single-stage bearing, distributing the 100,000 RPM load across two or more bearings reduces bearing losses and increases the upper limit of the power input speed. However, the bearing speed driven by friction is unstable. It's possible for the bearing connected to the power mechanism to rotate faster while the others rotate very slowly. In this case, it's essentially still a single bearing working. The high-speed rotating bearing will overheat rapidly due to excessive speed, significantly reducing its lifespan and potentially causing momentary seizure. The performance of two-stage or multi-stage bearings cannot be fully realized.

[0005] Patent application number 201922190470.X discloses a high-speed bearing that uses two or more bearings connected in series and uses an independent power source to drive each bearing stage, thereby increasing the rotational speed of each bearing stage and raising the upper limit of the rotational speed that the high-speed bearing as a whole can withstand. However, since multiple drive devices are required to drive each bearing stage to rotate at high speed, the cost is relatively high, which is not conducive to its widespread adoption.

[0006] Therefore, how to increase the upper limit of bearing speed and extend bearing service life under the premise of low cost, so that bearings can be used in more high-speed working environments, is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art by providing a high-speed bearing.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a high-speed bearing, including a first rotating shaft, a first bearing assembly, a second bearing assembly, and a bearing housing. The inner ring of the first bearing assembly is disposed on the first rotating shaft and rotates synchronously with the first rotating shaft. The outer ring of the first bearing assembly rotates synchronously with the inner ring of the second bearing assembly. The outer ring of the second bearing assembly is fixedly connected to the bearing housing. A plurality of first permanent magnets are uniformly arranged circumferentially on the first rotating shaft. Any two adjacent first permanent magnets facing the same side have opposite polarities. A plurality of second permanent magnets are uniformly arranged circumferentially on the outer ring of the first bearing assembly. Any two adjacent second permanent magnets facing the same side have opposite polarities. A plurality of magnetic conductors are uniformly arranged circumferentially on the inner wall of the bearing housing to make the outer ring of the first bearing assembly rotate in the same direction as the first rotating shaft. The magnetic conductors include U-shaped turning portions. One of the two side walls of the U-shaped turning portions corresponds to the position of the first permanent magnet, and the other side wall corresponds to the position of the second permanent magnet.

[0009] According to Lin Jia's master's thesis "Research on Magnetic Gear Modulated by Magnetic Field" published in the 4th issue of the Master's Electronic Journal in 2014 at Harbin Institute of Technology in July 2012, section 2.2 - Analysis of the working principle of magnetic gears mentions a schematic diagram of the magnetic gear structure. In the first working mode of the four working modes, the inner rotor and the outer rotor keep rotating while the magnetic ring is stationary. Section 3.3 - Study on the steady-state torque characteristics of magnetic gears mentions the first working mode as an example. When the inner rotor rotates counterclockwise at a speed of Ω1, the outer rotor rotates clockwise at a speed of 4*Ω1 / 11.

[0010] Therefore, based on the principle of magnetic gears, multiple first permanent magnets are evenly arranged circumferentially on the first rotating shaft, and multiple second permanent magnets are evenly arranged circumferentially on the outer ring of the first bearing assembly. Multiple elongated magnetic conductors are arranged circumferentially on the bearing housing. When the first rotating shaft rotates, the outer ring of the first bearing assembly rotates proportionally in the opposite direction a certain number of times. Therefore, when the first rotating shaft rotates, the outer ring of the first bearing assembly rotates in the opposite direction. However, since the reverse rotation of the outer ring of the first bearing assembly introduces resistance to the operation of the entire high-speed bearing, affecting its performance, it is necessary to change the direction of rotation of the outer ring of the first bearing assembly so that it rotates at high speed in the same direction as the first rotating shaft, thereby maximizing the upper limit of the rotational speed that the high-speed bearing can withstand.

[0011] As simple Figure 16As shown, an experiment was conducted based on the principle of magnetic gears. The first multi-stage magnetic ring 9, the iron core 10, and the second multi-stage magnetic ring 11 were arranged sequentially from left to right. When viewed from left to right, when the first multi-stage magnetic ring 9 rotates clockwise, the second multi-stage magnetic ring 11 rotates counterclockwise. When the iron core 10 is bent upwards by 90° into an L-shape, the second multi-stage magnetic ring 11 moves with the bent end of the iron core 10. When the first multi-stage magnetic ring 9 rotates clockwise when viewed from left to right, the second multi-stage magnetic ring 11 still rotates counterclockwise when viewed from bottom to top. Furthermore, when the iron core 10 is bent into a 180° U-shape, the second multi-stage magnetic ring 11 still moves with the bent end of the iron core 10. When the first multi-stage magnetic ring 9 rotates clockwise when viewed from left to right, the second multi-stage magnetic ring 11 still rotates counterclockwise when viewed from right to left, but when viewed from left to right, the second multi-stage magnetic ring 11 rotates clockwise.

[0012] Therefore, this application redirects the magnetic field through the U-shaped deflection part of the magnetic conductor, causing the inner ring of the second bearing assembly to rotate in the same direction as the first shaft. Since the rotational speed of the inner ring of the second bearing assembly is increased, the workload of the first bearing assembly can be shared, the upper limit of the power input speed that the bearing as a whole can withstand is also increased, and the bearing life will not be reduced.

[0013] Furthermore, a connecting body is provided between the outer ring of the first bearing assembly and the inner ring of the second bearing assembly.

[0014] Furthermore, the inner ring of the second bearing assembly is fitted onto the outer ring of the first bearing assembly.

[0015] Furthermore, the outer ring of the first bearing assembly and the inner ring of the second bearing assembly are an integrated structure.

[0016] Furthermore, of the two opposing side walls of the U-shaped turning portion, one side wall has a clearance fit with the side wall of the first permanent magnet, and the other side wall has a clearance fit with the side wall of the second permanent magnet. The magnetic conductor adopts a single U-shaped structure, which is easy to process and has low production cost.

[0017] Furthermore, the magnetic conductor also includes a first extension section and a second extension section. The first extension section and the second extension section are respectively fixedly connected to the ends of the two side walls of the U-shaped turning part away from the bottom wall. The first extension section is in clearance fit with the outer peripheral wall of the first permanent magnet, and the second extension section is in clearance fit with the outer peripheral wall of the second permanent magnet. Through the first extension section and the second extension section, the magnetic conductor can get closer to the first and second permanent magnets without contacting them, resulting in good magnetic conductivity and sensitive response.

[0018] Furthermore, the magnetic conductor also includes a third extension section, which is fixedly connected to the end of any sidewall of the U-shaped turning portion that is away from the bottom wall. The third extension section is in clearance fit with the outer peripheral wall of the first or second permanent magnet, while the other sidewall of the U-shaped turning portion is in clearance fit with the sidewall of the second or first permanent magnet. Through the third extension section, the magnetic conductor moves closer to the first or second permanent magnet without contacting it, resulting in better magnetic conductivity and more sensitive response.

[0019] Furthermore, the plurality of magnetic conductors are twisted and tilted circumferentially along the inner wall of the bearing housing. Because there are gaps between the magnetic conductors, there will be a jerking sensation when the second bearing assembly rotates. After twisting the magnetic conductors, the magnetic conduction effect is better, and the inner ring of the second bearing assembly rotates more smoothly.

[0020] Furthermore, the plurality of first permanent magnets and / or second permanent magnets are twisted and tilted along the axial direction of the first rotating shaft. After the first permanent magnets and / or second permanent magnets are twisted and tilted, they can cooperate more smoothly with the twisted and tilted magnetic conductor, resulting in better magnetic conduction and smoother rotation of the inner ring of the second bearing assembly.

[0021] Furthermore, the inner ring of the second bearing assembly is connected to the second rotating shaft. With the second rotating shaft receiving power input, the second permanent magnet rotates synchronously as the shaft rotates. The magnetic field is redirected through a magnetic guide, causing the first and second permanent magnets to rotate in the same direction, thus outputting power to the first rotating shaft according to the speed ratio. Existing brushless drives can only complete 250,000 commutations per minute, or 250,000 revolutions per minute. Utilizing the high-speed advantage of the multi-ring bearing, an acceleration function is added, allowing existing drives or frequency converters to exceed their speed limit, reaching 350,000 revolutions per minute.

[0022] The beneficial effects of this invention are: the high-speed bearing provided by this invention uses a U-shaped deflection part of a magnetic conductor to deflect the magnetic field, so that the inner ring of the second bearing assembly rotates in the same direction as the first shaft; since the rotational speed of the inner ring of the second bearing assembly is increased, the workload of the first bearing assembly can be shared, the upper limit of the power input speed that the bearing as a whole can withstand is also increased, the bearing life is not reduced, the production cost is low, and the application range is wide. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure after removing the bearing housing in the first embodiment of the present invention;

[0026] Figure 3This is a schematic diagram of the structure of the magnetic conductor according to the first embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the first permanent magnet;

[0028] Figure 5 This is a schematic diagram of the structure of the second permanent magnet;

[0029] Figure 6 This is a structural schematic diagram of Embodiment 2;

[0030] Figure 7 This is a schematic diagram of the internal structure after removing the bearing housing in Embodiment 2;

[0031] Figure 8 This is a schematic diagram of the structure of the magnetic conductor in Embodiment 2;

[0032] Figure 9 This is a structural schematic diagram of Embodiment 3;

[0033] Figure 10 This is a schematic diagram of the internal structure after removing the bearing housing in Embodiment 3;

[0034] Figure 11 This is a schematic diagram of the structure of the magnetic conductor in Embodiment 3;

[0035] Figure 12 This is a structural schematic diagram of Embodiment 4;

[0036] Figure 13 This is a schematic diagram of the internal structure after removing the bearing housing in Embodiment 4;

[0037] Figure 14 This is a schematic diagram of the structure of the magnetic conductor in Embodiment 4;

[0038] Figure 15 This is a structural schematic diagram of Example 5;

[0039] Figure 16 This is a simplified diagram of the experiment.

[0040] In the figure: 1. First rotating shaft, 2. First bearing assembly, 3. Second bearing assembly, 4. Bearing seat, 5. Second rotating shaft, 6. First permanent magnet, 7. Second permanent magnet, 8. Magnetic conductor, 801. U-shaped turning part, 802. First extension section, 803. Second extension section, 804. Third extension section, 9. First multi-stage magnetic ring, 10. Iron core, 11. Second multi-stage magnetic ring. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0042] Example 1:

[0043] like Figure 1-5 As shown, a high-speed bearing of the present invention includes a first rotating shaft 1, a first bearing assembly 2, a second bearing assembly 3, and a bearing housing 4. The inner ring of the first bearing assembly 2 is disposed on the first rotating shaft 1 and rotates synchronously with the first rotating shaft 1. The outer ring of the first bearing assembly 2 rotates synchronously with the inner ring of the second bearing assembly 3. The outer ring of the second bearing assembly 3 is fixedly connected to the bearing housing 4. A plurality of first permanent magnets 6 are uniformly arranged circumferentially on the first rotating shaft 1, and any two adjacent first permanent magnets 6 have opposite polarities facing the same side. A plurality of second permanent magnets 7 are uniformly arranged circumferentially on the outer ring of the first bearing assembly 2, and any two adjacent second permanent magnets 7 have opposite polarities facing the same side. A plurality of magnetic conductors 8 are uniformly arranged circumferentially on the inner wall of the bearing housing 4 to cause the outer ring of the first bearing assembly 2 to rotate in the same direction as the first rotating shaft 1. The magnetic conductors 8 include a U-shaped turning portion 801. One of the two side walls of the U-shaped turning portion 801, which are arranged opposite to each other, corresponds to the position of the first permanent magnet 6, and the other side wall corresponds to the position of the second permanent magnet 7. The magnetic conductors 8 can be made of silicon steel.

[0044] A connecting body is provided between the outer ring of the first bearing assembly 2 and the inner ring of the second bearing assembly 3.

[0045] The U-shaped turning part 801 has two opposing side walls, one of which is in clearance fit with the side wall of the first permanent magnet 6, and the other side wall is in clearance fit with the side wall of the second permanent magnet 7.

[0046] Work process:

[0047] The first rotating shaft 1 is driven to rotate by the power mechanism. When the first rotating shaft 1 rotates, the first permanent magnet 6 rotates synchronously. The magnetic field is redirected by the magnetic conductor 8, so that the second permanent magnet 7 rotates in the same direction as the first permanent magnet 6. Therefore, when the first rotating shaft 1 rotates at high speed, it can drive the inner ring of the second bearing assembly 3 to rotate in the same direction.

[0048] Example 2:

[0049] like Figure 6-8 As shown, the difference between this embodiment and Embodiment 1 is that the magnetic conductor 8 further includes a first extension section 802 and a second extension section 803. The first extension section 802 and the second extension section 803 are respectively fixedly connected to the ends of the two side walls of the U-shaped turning part 801 away from the bottom wall. The first extension section 802 is in clearance fit with the outer peripheral wall of the first permanent magnet 6, and the second extension section 803 is in clearance fit with the outer peripheral wall of the second permanent magnet 7.

[0050] Example 3:

[0051] like Figure 9-11As shown, the difference between this embodiment and Embodiment 1 is that the plurality of magnetic conductors 8 are circumferentially torsionally tilted along the inner wall surface of the bearing seat 4. The plurality of first permanent magnets 6 and / or second permanent magnets 7 are axially torsionally tilted along the first rotating shaft 1.

[0052] Example 4:

[0053] like Figure 12-14 As shown, the difference between this embodiment and Embodiment 1 is that the magnetic conductor 8 further includes a third extension section 804. The third extension section 804 is fixedly connected to the end of any side wall of the U-shaped turning part 801 away from the bottom wall. The third extension section 804 is in clearance fit with the outer peripheral wall of one of the permanent magnets, the first permanent magnet 6 or the second permanent magnet 7. The other side wall of the U-shaped turning part 801 is in clearance fit with the side wall of the other permanent magnet.

[0054] Example 5:

[0055] like Figure 15 As shown, the difference between this embodiment and Embodiment 1 is that the inner ring of the second bearing assembly 3 is connected to the second rotating shaft 5.

[0056] Work process:

[0057] The second rotating shaft 5 is driven to rotate by the power mechanism. When the second rotating shaft 5 rotates, the second permanent magnet 7 rotates synchronously. The magnetic field is redirected by the magnetic conductor 8, so that the first permanent magnet 6 and the second permanent magnet 7 rotate in the same direction. The rotation speed ratio affects the speed of the first rotating shaft 1.

[0058] In this invention, directions and references (e.g., up, down, left, right, etc.) may be used only to aid in the description of features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0059] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of the present invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-speed bearing, characterized in that: The bearing assembly includes a first rotating shaft (1), a first bearing assembly (2), a second bearing assembly (3), and a bearing housing (4). The inner ring of the first bearing assembly (2) is mounted on the first rotating shaft (1) and rotates synchronously with the first rotating shaft (1). The outer ring of the first bearing assembly (2) rotates synchronously with the inner ring of the second bearing assembly (3). The outer ring of the second bearing assembly (3) is fixedly connected to the bearing housing (4). A plurality of first permanent magnets (6) are uniformly arranged circumferentially on the first rotating shaft (1). Any two adjacent first permanent magnets (6) have opposite polarities facing the same side. The outer ring of the bearing assembly (2) is uniformly provided with a plurality of second permanent magnets (7) along the circumferential direction. Any two adjacent second permanent magnets (7) have opposite polarities facing the same side. The inner wall of the bearing seat (4) is uniformly provided with a plurality of magnetic conductors (8) along the circumferential direction to make the outer ring of the first bearing assembly (2) rotate in the same direction as the first rotating shaft (1). The magnetic conductor (8) includes a U-shaped turning part (801). One of the two side walls of the U-shaped turning part (801) is positioned with the position of the first permanent magnet (6), and the other side wall is positioned with the position of the second permanent magnet (7). The plurality of magnetic conductors (8) are twisted and tilted circumferentially along the inner wall surface of the bearing seat (4); Multiple first permanent magnets (6) and / or second permanent magnets (7) are twisted and tilted along the first rotating shaft (1) axial direction; The magnetic conductor (8) further includes a first extension section (802) and a second extension section (803). The first extension section (802) and the second extension section (803) are respectively fixedly connected to the ends of the two side walls of the U-shaped turning part (801) away from the bottom wall. The first extension section (802) is in clearance fit with the outer peripheral wall of the first permanent magnet (6), and the second extension section (803) is in clearance fit with the outer peripheral wall of the second permanent magnet (7). The inner ring of the second bearing assembly (3) is connected to the second rotating shaft (5).

2. A high-speed bearing as described in claim 1, characterized in that: A connecting body is provided between the outer ring of the first bearing assembly (2) and the inner ring of the second bearing assembly (3).

3. A high-speed bearing as described in claim 1, characterized in that: The inner ring of the second bearing assembly (3) is fitted onto the outer ring of the first bearing assembly (2).

4. A high-speed bearing as described in claim 1 or 2, characterized in that: The outer ring of the first bearing assembly (2) and the inner ring of the second bearing assembly (3) are an integrated structure.

5. A high-speed bearing as described in claim 1, characterized in that: The U-shaped turning part (801) has two opposing side walls, one of which is in clearance fit with the side wall of the first permanent magnet (6), and the other side wall is in clearance fit with the side wall of the second permanent magnet (7).

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