Magnetic suspension bearing with cooling structure

Abstract

The utility model discloses a magnetic suspension bearing with a cooling structure, which comprises a bearing outer ring and a bearing inner ring, a radial magnetic suspension component and an axial magnetic suspension component are arranged between the bearing outer ring and the bearing inner ring, and a spiral cooling water channel is arranged in the bearing outer ring. According to the magnetic suspension bearing with the cooling structure, the spiral cooling water channel is formed in the bearing outer ring, cooling water in the cooling water channel can directly take away heat generated in the working process of the magnetic suspension bearing, the cooling effect is good, and the situation that the service life of the magnetic suspension bearing is shortened due to poor heat dissipation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and more specifically, to a magnetic suspension bearing with a cooling structure. Background Art

[0002] Magnetic bearings are a new type of bearing that utilizes magnetic force to achieve contactless operation. They offer a range of excellent qualities, including non-contact operation, no need for lubrication or sealing, low vibration, long service life, and low maintenance costs. Magnetic bearings can be categorized into two types based on their principle: active magnetic bearings and passive magnetic bearings. Due to the superior performance of the active magnetic bearing, they are gaining increasing industrial application. Active magnetic bearings utilize electromagnetic force to maintain stable suspension, while the axis center position can be controlled by a control system. They consist of a displacement sensor, a controller, a power amplifier, and an electromagnetic actuator. Their operating principle is as follows: the displacement sensor monitors the axis position and transmits this information to the control system. The control system determines the necessary control signals and sends them to the power amplifier, which converts them into an increased current in the electromagnetic actuator, causing the rotating axis to be positioned at the center of the bearing actuator.

[0003] Patent document CN221723237U discloses a magnetic levitation bearing, comprising a cylindrical inner casing; a magnet is coaxially mounted in the center of the inner casing, with a primary radial bearing seat and a secondary radial bearing seat coaxially mounted in the inner casing at each end of the magnet. The outer ends of the primary radial bearing seat and the secondary radial bearing seat are respectively limited and pressed by the primary protective bearing seat and the secondary protective bearing seat at the end of the inner casing, and the inner ends of the primary radial bearing seat and the secondary radial bearing seat are both provided with coils. The utility model has a two-stage, front and rear two-stage, two-stage magnetic levitation structure that can maintain the stable suspension state of the shaft in an extremely efficient manner during operation, with high fault tolerance and lower control difficulty. The secondary magnetic levitation causes the control output to act on the two-stage coils simultaneously, amplifying the state control effect, thereby structurally ensuring that the control accuracy is improved.

[0004] The existing magnetic bearing has a heat dissipation structure on the bearing seat, which cannot directly dissipate the heat of the bearing, resulting in poor heat dissipation effect. Long-term use can easily lead to a reduction in the service life of the magnetic bearing.

[0005] Therefore, it is necessary to propose a magnetic suspension bearing with a cooling structure to solve the problems existing in the prior art, that is, the heat dissipation effect is poor and long-term use easily leads to a reduction in the service life of the magnetic suspension bearing. Utility Model Content

[0006] The Summary of the Utility Model introduces a series of simplified concepts that will be further described in the Detailed Description of the Utility Model. The Summary of the Utility Model of the Utility Model does not intend to limit the key features and essential technical features of the claimed technical solution, nor does it intend to determine the scope of protection of the claimed technical solution.

[0007] To solve the above problems, the utility model provides a magnetic levitation bearing with a cooling structure, including a bearing outer ring and a bearing inner ring, a radial magnetic levitation component and an axial magnetic levitation component are arranged between the bearing outer ring and the bearing inner ring, and a spiral cooling water channel is arranged inside the bearing outer ring.

[0008] Preferably, both ends of the cooling water channel are respectively communicated with a water inlet and a water outlet provided on the outer circumference of the bearing outer ring.

[0009] Preferably, the openings of the water inlet and the water outlet are both provided with sealing grooves, and sealing rings are provided in the sealing grooves.

[0010] Preferably, the radial magnetic levitation assembly includes a stator unit detachably arranged in the outer ring of the bearing, the stator unit being a circular ring structure with teeth arranged in an array along the circumferential direction on the inner wall, and the coil windings being arranged on the teeth;

[0011] Two groups of radial magnetic levitation components are symmetrically arranged on both sides of the axial magnetic levitation component.

[0012] Preferably, a ventilation duct arranged axially along the bearing outer ring is provided inside the bearing outer ring and spaced apart from the cooling water channel. A plurality of ventilation ducts are arranged in a circumferential array along the axis of the bearing outer ring, and the positions of the ventilation ducts correspond to the gaps between adjacent teeth.

[0013] Preferably, a fan is provided on a side of the radial magnetic levitation assembly away from the center of the bearing outer ring, and the fan is fixedly provided on the outer circumference of the bearing inner ring.

[0014] Preferably, the fan includes a fixing ring, which is fixedly connected to the inner ring of the bearing. The fixing ring is fixedly connected to the fan body through webs arranged in an array along the circumferential direction. The fan body includes an inner ring and an outer ring. Blades are fixedly arranged between the inner ring and the outer ring, and multiple blades are evenly arranged along the circumferential direction of the inner ring.

[0015] Preferably, the two ends of the outer ring of the bearing are detachably connected to the end covers, and an air guide groove is provided on the inner side wall of the end cover along the radial direction of the end cover. The plurality of air guide grooves are arranged in a circular array with the center of the end cover as the center, and the number of the air guide grooves is the same as the number of the ventilation ducts and is arranged accordingly.

[0016] Preferably, the axial magnetic levitation assembly includes a connecting plate fixedly arranged in the middle of the inner wall of the bearing outer ring, and a plurality of ventilation holes are provided on the side wall of the connecting plate.

[0017] Preferably, the sealing ring is made of rubber, silicone or polyurethane.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The magnetic levitation bearing with a cooling structure described in the utility model has a spiral cooling water channel inside the outer ring of the bearing. The cooling water in the cooling water channel can directly take away the heat generated during the operation of the magnetic levitation bearing, which has a good cooling effect and prevents the service life of the magnetic levitation bearing from being reduced due to poor heat dissipation.

[0020] The magnetic bearing with cooling structure described in the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a structural diagram of a magnetic bearing with a cooling structure disclosed in the present utility model;

[0023] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0024] Figure 3 This is a schematic structural diagram of the bearing outer ring disclosed in the present utility model;

[0025] Figure 4 It is a schematic cross-sectional structural diagram of the magnetic levitation assembly disclosed in the present utility model from the right side;

[0026] Figure 5 This is a schematic structural diagram of the fan disclosed in the present utility model;

[0027] Figure 6 This is a schematic structural diagram of the end cover disclosed in the present utility model;

[0028] Figure 7 This is a structural schematic diagram of the connecting plate disclosed in the present utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0030] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0031] like Figure 1-7 As shown, a magnetic levitation bearing with a cooling structure includes a bearing outer ring 1 and a bearing inner ring 2, a radial magnetic levitation component 3 and an axial magnetic levitation component 4 are arranged between the bearing outer ring 1 and the bearing inner ring 2, and a spiral cooling water channel 5 is arranged inside the bearing outer ring 1.

[0032] Furthermore, both ends of the cooling water channel 5 are respectively communicated with a water inlet 6 and a water outlet 7 provided on the outer circumference of the bearing outer ring 1 .

[0033] Furthermore, a sealing groove 8 is provided at the openings of the water inlet 6 and the water outlet 7 , and a sealing ring 9 is provided in the sealing groove 8 .

[0034] Furthermore, the radial magnetic levitation assembly 3 includes a stator unit 10 detachably disposed in the bearing outer ring 1. The stator unit 10 is a circular structure with teeth 11 arranged in an array along the circumferential direction on the inner wall. The coil winding is arranged on the teeth 11.

[0035] Two groups of radial magnetic levitation components 3 are symmetrically arranged on both sides of the axial magnetic levitation component 4.

[0036] Furthermore, a ventilation duct 12 is provided inside the bearing outer ring 1 and is spaced apart from the cooling water channel 5 and arranged axially along the bearing outer ring 1 . A plurality of ventilation ducts 12 are arranged in a circular array along the axis of the bearing outer ring 1 , and the positions of the ventilation ducts 12 correspond to the gaps between adjacent teeth 11 .

[0037] Furthermore, a fan 13 is provided on a side of the radial magnetic levitation assembly 3 away from the center of the bearing outer ring 1 , and the fan 13 is fixedly provided on the outer circumference of the bearing inner ring 2 .

[0038] Furthermore, the fan 13 includes a fixing ring 22, which is fixedly connected to the bearing inner ring 2. The fixing ring 22 is fixedly connected to the fan body via webs 14 arranged in an array along the circumferential direction. The fan body includes an inner ring 15 and an outer ring 16. Blades 17 are fixedly arranged between the inner ring 15 and the outer ring 16. A plurality of blades 17 are evenly arranged along the circumference of the inner ring 15.

[0039] Two fans 13 are symmetrically arranged outside the two radial magnetic levitation assemblies 3 .

[0040] Furthermore, the two ends of the bearing outer ring 1 are detachably connected to the end cover 18, and an air guide groove 19 is provided on the inner side wall of the end cover 18 along the radial direction of the end cover 18. A plurality of air guide grooves 19 are arranged in a circular array with the center of the end cover 18 as the center. The number of air guide grooves 19 is the same as the number of ventilation ducts 12 and is arranged accordingly.

[0041] Furthermore, the axial magnetic levitation assembly 4 includes a connecting plate 20 fixedly arranged at the middle portion of the inner wall of the bearing outer ring 1 , and a plurality of ventilation holes 21 are provided on the side wall of the connecting plate 20 .

[0042] Furthermore, the sealing ring 9 is made of rubber, silicone or polyurethane.

[0043] The working principle of the above technical solution is:

[0044] The magnetic levitation bearing in the prior art cools the bearing seat, which increases heat transfer and has poor heat dissipation effect. The magnetic levitation bearing with a cooling structure described in the utility model includes a bearing outer ring 1 and a bearing inner ring 2. A radial magnetic levitation component 3 and an axial magnetic levitation component 4 are arranged between the bearing outer ring 1 and the bearing inner ring 2. A spiral cooling water channel 5 is arranged inside the bearing outer ring 1. The cooling water channel 5 is connected to the water channel on the bearing seat. The cooling water in the cooling water channel 5 can promptly take away the heat generated by the magnetic levitation bearing during operation, and the heat dissipation efficiency is high.

[0045] A ventilation duct 12 is provided inside the bearing outer ring 1 and spaced apart from the cooling water channel 5, and is arranged along the axial direction of the bearing outer ring 1. A plurality of ventilation ducts 12 are arranged in a circular array along the axis of the bearing outer ring 1. The position of the ventilation duct 12 corresponds to the gap between adjacent teeth 11. The center of the plurality of blades 17 of the fan 13 forms a circular ring that coincides with the center of the plurality of ventilation ducts 12. The wind blown out by the blades of the fan 13 on the left can enter the ventilation duct 12. The fan 13 is symmetrically provided at the other end of the bearing outer ring 1 to suck the air in the ventilation duct 12 and then blow the air to the guide on the end cover 18. The air passes through the air guide groove 19 on the right end cover 18, enters the space between the teeth 11 and the inner space between the bearing outer ring 1 and the bearing inner ring 2, passes through the ventilation holes on the connecting plate 20, and passes through the air guide groove 19 on the left end cover 18 again. It enters the ventilation duct through the left fan 13, forming an air circulation, taking away the heat between the bearing outer ring 1 and the bearing inner ring 2 and on the radial magnetic levitation component 3 and the axial magnetic levitation component 4 on the bearing inner ring 2. After entering the ventilation duct 12, the heat is transferred to the bearing outer ring 1, and then the heat is taken away by the cooling water, thereby improving the heat dissipation efficiency of the magnetic suspension bearing.

[0046] The inner ring 15 and the outer ring 16 of the fan body can better enable the blades to blow air into the ventilation duct 12.

[0047] The radial magnetic levitation assembly 3 and the axial magnetic levitation assembly 4 both include a stator unit fixedly arranged on the bearing outer ring 1 and a rotor unit fixedly arranged on the bearing inner ring 2. The rotor unit and the stator unit are arranged correspondingly. The radial magnetic levitation assembly 3 and the axial magnetic levitation assembly 4 are prior art, such as the bearing stator and rotor of the magnetic levitation bearing disclosed in CN220687849U or CN202011555742, which will not be repeated here.

[0048] A positioning device can be installed on the outer circumference of the bearing outer ring 1 to ensure that when the magnetic bearing is installed on the bearing seat, the cooling water channel 5 is aligned with the water channel on the bearing seat, ensuring the normal flow of cooling water. Because the cooling water pressure is relatively low during the cooling process, sealing rings 9 are installed on the water inlet 6 and outlet 7 to ensure a seal between the magnetic bearing and the bearing seat, preventing cooling water leakage and preventing it from affecting the operation of the magnetic bearing.

[0049] The radial magnetic levitation component 3 can be detachably arranged inside the bearing outer ring 1, and can be connected using screws or retaining rings. The end cover 18 can be connected to the end face of the bearing outer ring 1 using screws. Multiple threaded holes can be evenly arranged on the end face of the bearing outer ring 1 along the circumferential direction, and a through hole is opened on the end cover 18 at a position opposite to the threaded hole for the screw to pass through.

[0050] End covers 18 are provided at both ends of the bearing outer ring 1 to keep the interior of the bearing relatively closed, preventing the entry of dust and other debris, and preventing debris from entering the air gap between the stator unit and the rotor unit of the high-speed rotating magnetic bearing, causing damage to the magnetic bearing.

[0051] Beneficial effects of the above technical solution:

[0052] The magnetic levitation bearing with a cooling structure described in the utility model has a spiral cooling water channel inside the outer ring of the bearing. The cooling water in the cooling water channel can directly take away the heat generated during the operation of the magnetic levitation bearing, which has a good cooling effect and prevents the service life of the magnetic levitation bearing from being reduced due to poor heat dissipation.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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 simplifying the description, 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 should not be understood as a limitation to the present invention.

[0054] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0055] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A magnetic bearing with a cooling structure, characterized in that: The invention comprises a bearing outer ring (1) and a bearing inner ring (2), wherein a radial magnetic levitation component (3) and an axial magnetic levitation component (4) are arranged between the bearing outer ring (1) and the bearing inner ring (2), and a spiral cooling water channel (5) is arranged inside the bearing outer ring (1).

2. The magnetic bearing with a cooling structure according to claim 1, characterized in that: The two ends of the cooling water channel (5) are respectively communicated with a water inlet (6) and a water outlet (7) provided on the outer circumference of the bearing outer ring (1).

3. The magnetic bearing with a cooling structure according to claim 2, characterized in that: The openings of the water inlet (6) and the water outlet (7) are both provided with sealing grooves (8), and sealing rings (9) are arranged in the sealing grooves (8).

4. The magnetic bearing with a cooling structure according to claim 1, characterized in that: The radial magnetic levitation assembly (3) comprises a stator unit (10) detachably arranged in the outer ring of the bearing (1); the stator unit (10) is a circular ring structure with teeth (11) arranged in an array along the circumferential direction on the inner wall; and coil windings are arranged on the teeth (11); Two groups of radial magnetic levitation components (3) are symmetrically arranged on both sides of the axial magnetic levitation component (4).

5. The magnetic bearing with a cooling structure according to claim 4, characterized in that: A ventilation duct (12) is provided inside the bearing outer ring (1) and spaced apart from the cooling water channel (5) along the axial direction of the bearing outer ring (1). A plurality of ventilation ducts (12) are arranged in a circumferential array along the axis of the bearing outer ring (1). The positions of the ventilation ducts (12) correspond to the gaps between adjacent teeth (11).

6. The magnetic bearing with a cooling structure according to claim 5, characterized in that: A fan (13) is provided on one side of the radial magnetic levitation component (3) away from the center of the bearing outer ring (1), and the fan (13) is fixedly arranged on the outer circumference of the bearing inner ring (2).

7. The magnetic bearing with a cooling structure according to claim 6, characterized in that: The fan (13) includes a fixed ring (22), the fixed ring (22) is fixedly connected to the bearing inner ring (2), the fixed ring (22) is fixedly connected to the fan body through webs (14) arranged in an array along the circumferential direction, the fan body includes an inner ring (15) and an outer ring (16), blades (17) are fixedly arranged between the inner ring (15) and the outer ring (16), and a plurality of blades (17) are evenly arranged along the circumferential direction of the inner ring (15); Two fans (13) are symmetrically arranged outside the two radial magnetic levitation components (3).

8. The magnetic bearing with a cooling structure according to claim 7, characterized in that: The two ends of the bearing outer ring (1) are detachably connected to the end covers (18), and an air guide groove (19) is provided on the inner side wall of the end cover (18) along the radial direction of the end cover (18). The plurality of air guide grooves (19) are arranged in a circular array with the center of the end cover (18) as the center. The number of the air guide grooves (19) is the same as the number of the ventilation ducts (12) and is arranged accordingly.

9. The magnetic bearing with a cooling structure according to claim 8, characterized in that: The axial magnetic levitation assembly (4) comprises a connecting plate (20) fixedly arranged at the middle of the inner wall of the bearing outer ring (1), and a plurality of ventilation holes (21) are provided on the side wall of the connecting plate (20).

10. The magnetic bearing with a cooling structure according to claim 3, characterized in that: The sealing ring (9) is made of rubber, silica gel or polyurethane material.

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