Internal and external cylindrical magnetic suspension bearing device

Abstract

The invention discloses an inner and outer cylinder type magnetic suspension bearing device, and relates to the technical field of magnetic suspension bearings, the inner and outer cylinder type magnetic suspension bearing device comprises an outer cylinder shell, a coupling body and two adjusting end covers, the coupling body is located in the outer cylinder shell, an inner cylinder type magnet is installed on the outer wall of the coupling body, and an outer cylinder type magnet is arranged on the inner wall of the outer cylinder shell; repulsive force exists between the inner cylindrical magnets and the outer cylindrical magnets, the two adjusting end covers are connected to openings in the two ends of the outer cylindrical shell respectively, outer annular magnets are arranged on the adjusting end covers, inner annular magnets are fixed to the two ends of the coupling body respectively, and repulsive force exists between the outer annular magnets and the inner annular magnets. The adjusting end cover can move in the axial direction of the outer barrel shell. By adjusting the end cover to move in the axial direction of the outer cylinder shell, the distance between the inner ring type magnet and the outer ring type magnet is adjusted, the acting force between the outer ring type magnet and the inner ring type magnet can be changed, and therefore the position of the coupling body in the axial direction of the outer cylinder shell is adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic suspension bearing, in particular to an inner and outer cylindrical magnetic suspension bearing device. BACKGROUND

[0002] The bearing is an important basic component in industrial equipment, and the bearing market is currently mainly composed of traditional mechanical bearings. Since the outer ring structure and the inner ring structure of the traditional mechanical bearing are in contact, the traditional mechanical bearing inevitably has the characteristics of high wear, high energy consumption, large self-weight, large noise and complicated maintenance. In order to solve the problem of mechanical friction existing in the traditional mechanical bearing, the magnetic suspension bearing is developed in the prior art. The magnetic suspension bearing avoids a series of problems caused by mechanical friction by virtue of magnetic action so that the outer ring structure and the inner ring structure of the bearing are not directly in contact.

[0003] However, once the existing magnetic suspension bearing is installed, the driving structure connected to the inner ring or the outer ring of the magnetic suspension bearing may be axially deviated, so that the center point of the inner ring or the outer ring structure of the magnetic suspension bearing is deviated. If the deviation is too large, it will affect the normal use of the magnetic suspension bearing.

[0004] Therefore, there is an urgent need in the art for a new inner and outer cylindrical magnetic suspension bearing device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide an inner and outer cylindrical magnetic suspension bearing device to solve the problems existing in the prior art, which can adjust the relative position of the shaft coupling body inside the outer cylinder shell, avoid relative deviation between the two, and ensure the normal use of the device.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] The present application discloses an inner and outer cylindrical magnetic suspension bearing device, which comprises an outer cylinder shell, a shaft coupling body and two adjusting end covers. The shaft coupling body is located inside the outer cylinder shell, an inner cylinder magnet is installed on the outer wall of the shaft coupling body, an outer cylinder magnet is arranged on the inner wall of the outer cylinder shell, repulsion exists between the inner cylinder magnet and the outer cylinder magnet, two adjusting end covers are connected to the two end openings of the outer cylinder shell respectively, an outer ring magnet is arranged on each adjusting end cover, an inner ring magnet is fixed to each end of the shaft coupling body, repulsion exists between the outer ring magnet and the inner ring magnet, and the adjusting end cover can move along the axial direction of the outer cylinder shell.

[0008] Preferably, the outer cylinder magnet, the inner cylinder magnet, the outer ring magnet and the inner ring magnet are all ring structures.

[0009] Preferably, the outer cylinder type magnet, the inner cylinder type magnet, the outer ring type magnet and the inner ring type magnet are all connected by a plurality of magnetic material monomers along the annular direction.

[0010] Preferably, each of the magnetic material monomers is a tile-shaped magnet.

[0011] Preferably, each of the tile-shaped magnets is distributed along a Halbach array.

[0012] Preferably, the outer cylinder shell and the adjusting end cover are both made of magnetic shielding material.

[0013] Preferably, the center of the shaft body is provided with a center shaft hole, and the center shaft hole is used to install a connecting shaft.

[0014] Preferably, both ends of the outer cylinder shell are provided with shell threads, the adjusting end cover is provided with an end cover thread, and the shell thread is threadedly connected with the end cover thread.

[0015] Preferably, the shell thread is an internal thread, and the end cover thread is an external thread.

[0016] Preferably, the shell thread is an external thread, and the end cover thread is an internal thread.

[0017] The present application has the following technical effects relative to the prior art:

[0018] The present application drives the adjusting end covers on both sides to move along the axial direction of the outer cylinder shell, thereby changing the magnetic interaction force between the adjusting end covers on both sides and the shaft body, so as to drive the shaft body to relatively move along the axial direction of the outer cylinder shell, so as to adjust the center of the shaft body and the outer cylinder shell, so that the centers of the two always coincide, so as to avoid the relative deviation of the shaft body relative to the outer cylinder shell, and ensure the normal use of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a structure schematic view of the inner and outer cylinder type magnetic levitation bearing device of embodiment one.

[0021] Figure 2 It is a sectional view of the inner and outer cylinder type magnetic levitation bearing device of embodiment one.

[0022] Figure 3The exploded view of the inner and outer cylindrical magnetic suspension bearing device of the embodiment one;

[0023] Figure 4 The installation schematic view of the outer cylindrical magnet in the inner and outer cylindrical magnetic suspension bearing device of the embodiment one;

[0024] Figure 5 The connection relationship view of the shaft coupling in the inner and outer cylindrical magnetic suspension bearing device of the embodiment one;

[0025] Figure 6 The structure schematic view of the adjusting end cover in the inner and outer cylindrical magnetic suspension bearing device of the embodiment one;

[0026] Figure 7 The connection schematic view of the shell screw and the end cover screw in the inner and outer cylindrical magnetic suspension bearing device of the embodiment one;

[0027] Figure 8 The connection schematic view of the shell screw and the end cover screw in the inner and outer cylindrical magnetic suspension bearing device of the embodiment two;

[0028] In the figure: 1-the outer shell of the outer cylinder; 2-the adjusting end cover; 3-the outer cylindrical magnet; 4-the inner cylindrical magnet; 5-the outer ring magnet; 6-the inner ring magnet; 7-the shell screw; 8-the end cover screw; 9-the center shaft hole; 10-the shaft coupling; 11-the transverse magnet repulsion direction; 12-the longitudinal magnet repulsion direction. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] The purpose of the present application is to provide an inner and outer cylindrical magnetic suspension bearing device to solve the problems in the prior art, which can adjust the relative position of the shaft coupling inside the outer shell of the outer cylinder, avoid the relative deviation between the two, and ensure the normal use of the device.

[0031] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Embodiment one

[0033] As Figures 1-7As shown, this embodiment provides an inner and outer cylindrical magnetic levitation bearing device, including an outer cylindrical shell 1, a coupling 10 and two adjustable end caps 2, wherein the outer cylindrical shell 1 is a cylindrical structure, the coupling 10 is also a cylindrical structure, and a limit plate is provided at each end of the coupling 10. The diameter of the limit plate is larger than the diameter of the coupling 10. The coupling 10 and the limit plate are integrally formed, and it can be understood that the limit plate is a part of the coupling 10. The diameter of the coupling 10 is smaller than the diameter of the outer cylindrical shell 1. The coupling 10 is located inside the outer cylindrical shell 1, and in actual use, the axial direction of the coupling 10 is collinear with the axial direction of the outer cylindrical shell 1, and the centers of the two coincide. The inner cylindrical magnet 4 is mounted on the outer wall of the coupling 10 by bonding, and the limit plates at both ends of the coupling 10 can also position and limit the inner cylindrical magnet 4. An outer cylindrical magnet 3 is provided on the inner wall of the outer cylindrical shell 1. The inner diameter of the outer cylindrical magnet 3 is larger than the outer diameter of the inner cylindrical magnet 4. Figure 2 It can be seen from the figure that the horizontal length of the outer cylindrical magnet 3 is the same as the horizontal length of the inner cylindrical magnet 4. There is a repulsive force between the inner cylindrical magnet 4 and the outer cylindrical magnet 3. Figure 2 It can be seen from the figure that there is a longitudinal repulsive force between the inner cylindrical magnet 4 and the outer cylindrical magnet 3, namely Figure 2 The longitudinal magnetic repulsive force direction 12 in the outer cylindrical shell 1 is caused by the repulsive force between the inner cylindrical magnet 4 and the outer cylindrical magnet 3, so that the inner cylindrical magnet 4 is suspended in the outer cylindrical shell 1. The two adjustment end caps 2 are respectively connected to the left and right end openings of the outer cylindrical shell 1. Each adjustment end cap 2 is fixed with an outer ring magnet 5 by bonding. The two ends of the coupling body 10 are respectively fixed with an inner ring magnet 6 by bonding. There is a repulsive force between the outer ring magnet 5 and the inner ring magnet 6. The repulsive force between the outer ring magnet 5 and the inner ring magnet 6 is in the direction of Figure 3 The direction of the transverse magnetic repulsive force 11 in the outer cylindrical shell 1 is important to note that the adjusting end cap 2 can be installed at the end of the outer cylindrical shell 1. In addition, the adjusting end cap 2 can also be moved along the axial direction of the outer cylindrical shell 1. By changing the position of the adjusting end cap 2 on the outer cylindrical shell 1, the spacing between the inner ring magnet 6 and the outer ring magnet 5 on the corresponding side can be adjusted, and the force between the inner ring magnet 6 and the outer ring magnet 5 on the corresponding side can be further adjusted, thereby driving the coupling 10 to move axially relative to the outer cylindrical shell 1, thereby ensuring that the centers of the coupling 10 and the outer cylindrical shell 1 remain coincident.

[0034] The outer cylindrical shell 1 and the coupling 10 are respectively connected to two parts that need to rotate relative to each other. Due to the longitudinal repulsive force between the inner cylindrical magnet 4 and the outer cylindrical magnet 3, the coupling 10 is in a suspended state under the action of magnetic force, avoiding contact between the coupling 10 and the outer cylindrical shell 1, thereby effectively reducing mechanical friction. If the connecting shaft connected to the coupling 10 or the parts connected to the outer cylindrical shell 1 are offset in the axial direction due to external force or other reasons, the position of the two adjusting end caps 2 can be adjusted to change the distance between the two adjusting end caps 2 and the coupling 10, and further change the force between the outer ring magnets 5 on the two adjusting end caps 2 and the inner ring magnets 6 at both ends of the coupling 10, so as to drive the coupling 10 and the outer cylindrical shell 1 to move relative to each other, so that the center of the coupling and the center of the outer cylindrical shell 1 coincide again. For example, Figure 2 The middle direction is the standard. When the center of the coupling is located at the left end of the center of the outer cylinder shell 1, it is necessary to drive the left adjusting end cover 2 close to the coupling body 10, and the right adjusting end cover 2 away from the coupling body 10, that is, the left and right adjusting end covers 2 move to the right at the same time, and the specific distance of movement is adjusted according to actual conditions; when the center of the coupling is located at the right end of the center of the outer cylinder shell 1, it is necessary to drive the left adjusting end cover 2 away from the coupling body 10, and the right adjusting end cover 2 close to the coupling body 10, that is, the left and right adjusting end covers 2 move to the left at the same time, and the specific distance of movement is adjusted according to actual conditions.

[0035] In this embodiment, the outer cylindrical magnet 3, the inner cylindrical magnet 4, the outer ring magnet 5 and the inner ring magnet 6 are all annular structures. Figure 2 As can be seen from the figure, since the outer cylindrical magnet 3 and the inner cylindrical magnet 4 are longer in the horizontal direction, the outer cylindrical magnet 3 and the inner cylindrical magnet 4 are cylindrical structures. The outer ring magnet 5 and the inner ring magnet 6 are shorter in the horizontal direction, so the outer ring magnet 5 and the inner ring magnet 6 are annular structures. However, the axial directions of the outer cylindrical magnet 3, the inner cylindrical magnet 4, the outer ring magnet 5 and the inner ring magnet 6 are always collinear. It should be noted that the axial direction mentioned in this embodiment is Figure 2 Horizontal direction in .

[0036] In this embodiment, the outer cylindrical magnet 3, inner cylindrical magnet 4, outer ring magnet 5, and inner ring magnet 6 are each formed from multiple magnetic material units connected in a circular manner. Adjacent magnetic material units are bonded together. Because the outer cylindrical magnet 3 (or inner cylindrical magnet 4), outer ring magnet 5, and inner ring magnet 6 have different axial lengths, the lengths of their respective magnetic material units also differ.

[0037] In the present embodiment, each of the magnetic material monomers in any one of the outer cylinder magnet 3, the inner cylinder magnet 4, the outer ring magnet 5, and the inner ring magnet 6 is a tile-shaped magnet, that is, the cross section of each of the magnetic material monomers is tile-shaped, and the only difference is that the axial length of the tile-shaped magnet in the outer cylinder magnet 3 and the inner cylinder magnet 4 is longer than the axial length of the tile-shaped magnet in the outer ring magnet 5 and the inner ring magnet 6.

[0038] In other embodiments, the cross section of each of the magnetic material monomers in any one of the outer cylinder magnet 3, the inner cylinder magnet 4, the outer ring magnet 5, or the inner ring magnet 6 can not all be tile-shaped magnets, but can also be magnets of other cross-sectional shapes, as long as the final assembled ring structure is formed.

[0039] In the present embodiment, each tile-shaped magnet is distributed along a Halbach array. The purpose of using this distribution is to concentrate the magnetic field of the outer cylinder magnet 3, the inner cylinder magnet 4, the outer ring magnet 5, and the inner ring magnet 6 on one side, that is, the magnetic field of the outer cylinder magnet 3 is concentrated on the inner side of the outer cylinder magnet 3, the magnetic field of the inner cylinder magnet 4 is concentrated on the outer side of the inner cylinder magnet 4, the magnetic field of the outer ring magnet 5 is concentrated on the side close to the inner ring magnet 6, and the magnetic field of the inner ring magnet 6 is concentrated on the side close to the outer ring magnet 5, thereby enhancing the interaction force between the outer cylinder magnet 3 and the inner cylinder magnet 4, and the interaction force between the outer ring magnet 5 and the inner ring magnet 6.

[0040] In other embodiments, the outer cylinder magnet 3 and the inner cylinder magnet 4 can also be a whole cylindrical structure, and the outer ring magnet 5 and the inner ring magnet 6 are a circular ring structure. In this case, a multi-pole magnetization method can be used, so that the magnetic pole direction of the outer cylinder magnet 3, the inner cylinder magnet 4, the outer ring magnet 5, and the inner ring magnet 6 is also distributed according to the Halbach array, so that the magnetic field is also concentrated on one side.

[0041] In the present embodiment, the material of the outer cylinder shell 1 and the adjusting end cover 2 is a magnetic shielding material. The reason for using a magnetic shielding material is to use the shielding effect of carbon steel to concentrate the magnetic field inside the outer cylinder shell 1, thereby enhancing the magnetic field strength. The magnetic shielding material includes but is not limited to existing bearing steel or carbon steel.

[0042] In the present embodiment, the center of the shaft coupling body 10 is provided with a center shaft hole 9, and the center shaft hole 9 can be connected to the connecting shaft by a key connection.

[0043] In the present embodiment, the two ends of the outer cylinder shell 1 are provided with shell threads 7, and the adjusting end cover 2 is provided with end cover threads 8, and the shell threads 7 are threadedly connected to the corresponding end cover threads 8.

[0044] In the present embodiment, as shown in FIG. 1, the outer cylinder shell 1 is provided with a plurality of adjusting end covers 2, and the adjusting end covers 2 are arranged in the circumferential direction of the outer cylinder shell 1. Figure 7As shown, the housing thread 7 is an internal thread, and the end cap thread 8 is an external thread. When the adjustable end cap 2 is connected to the outer cylindrical housing 1, the portion of the adjustable end cap 2 with the end cap thread 8 is simply inserted into the interior of the outer cylindrical housing 1 and threadedly connected to the housing thread 7. To adjust the axial position of the adjustable end cap 2, simply rotate the adjustable end cap 2 to adjust the spacing between the adjustable end cap 2 and the coupling 10.

[0045] Example 2

[0046] like Figure 8 As shown, this embodiment provides an inner and outer cylindrical magnetic bearing device. The technical features provided by this embodiment are basically the same as those disclosed in Example 1, with the following differences:

[0047] In this embodiment, the housing thread 7 is an external thread, and the end cap thread 8 is an internal thread. When connecting the adjustable end cap 2 to the outer cylindrical housing 1, simply insert the portion of the outer cylindrical housing 1 provided with the housing thread 7 into the interior of the adjustable end cap 2 and threadably connect it to the end cap thread 8. To adjust the axial position of the adjustable end cap 2, simply rotate the adjustable end cap 2 to adjust the spacing between the adjustable end cap 2 and the coupling 10.

[0048] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0050] If the present application discloses or relates to mutually fixedly connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachably fixedly connected (for example, connected using bolts or screws), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming process) (obviously, integral forming process cannot be used).

[0051] In addition, the terms used to represent the positional relationship or shape in any technical solution disclosed by the present application include states or shapes similar, similar or close to them, unless otherwise stated.

[0052] Any component provided by the present application can be assembled from multiple individual components, or can be a single component manufactured by integral forming process.

[0053] It should be understood that the structure, proportion, size, etc. shown in the drawings of the present application are only used to illustrate the content disclosed in the specification, to enable those skilled in the art to understand and read, and do not define the limiting conditions for the implementation of the present application, therefore, they do not have technical substantive significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0054] It should be noted that the same reference numerals in the embodiments of the present application represent the same component or the same part.

[0055] Any adaptive change according to actual needs is within the scope of protection of the present application.

[0056] The present application uses specific examples to explain the principles and implementation methods of the present application, and the above examples are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation method and application range will be changed. In view of the above, the content of the present specification should not be understood as a limitation of the present application.

Claims

1. An inner and outer cylindrical magnetic bearing device, characterized in that: The invention comprises an outer cylindrical shell (1), a coupling (10) and two adjusting end covers (2), wherein the coupling (10) is located inside the outer cylindrical shell (1), an inner cylindrical magnet (4) is installed on the outer wall of the coupling (10), an outer cylindrical magnet (3) is provided on the inner wall of the outer cylindrical shell (1), and a repulsive force exists between the inner cylindrical magnet (4) and the outer cylindrical magnet (3), and the two adjusting end covers (2) are respectively connected to the openings at both ends of the outer cylindrical shell (1), and each adjusting end cover (2) is provided with an outer ring magnet (5), and an inner ring magnet (6) is fixed at each end of the coupling (10), and a repulsive force exists between the outer ring magnet (5) and the inner ring magnet (6), and the adjusting end cover (2) can move along the axial direction of the outer cylindrical shell (1).

2. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: The outer cylindrical magnet (3), the inner cylindrical magnet (4), the outer ring magnet (5) and the inner ring magnet (6) are all annular structures.

3. The inner and outer cylindrical magnetic bearing device according to claim 2, characterized in that: The outer cylindrical magnet (3), the inner cylindrical magnet (4), the outer ring magnet (5) and the inner ring magnet (6) are all formed by connecting a plurality of magnetic material monomers in a circular direction.

4. The inner and outer cylindrical magnetic bearing device according to claim 3, characterized in that: Each of the magnetic material monomers is a tile-shaped magnet.

5. The inner and outer cylindrical magnetic bearing device according to claim 4, characterized in that: The tile-shaped magnets are distributed along the Hailbeck array.

6. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: The outer cylindrical shell (1) and the regulating end cover (2) are both made of magnetic shielding material.

7. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: A central shaft hole (9) is provided at the center of the coupling body (10), and the central shaft hole (9) is used for installing a connecting shaft.

8. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: Both ends of the outer cylindrical shell (1) are provided with shell threads (7), the adjustment end cover (2) is provided with end cover threads (8), and the shell threads (7) are threadedly connected to the end cover threads (8).

9. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: The shell thread (7) is an internal thread, and the end cover thread (8) is an external thread.

10. The inner and outer cylindrical magnetic bearing device according to claim 1, characterized in that: The shell thread (7) is an external thread, and the end cover thread (8) is an internal thread.

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