Magnetic bearing heat dissipation device for vacuum magnetic suspension flywheel

Abstract

The utility model provides a magnetic bearing heat dissipation device for a vacuum magnetic suspension flywheel, and belongs to the technical field of flywheel energy storage. The magnetic pole is arranged on one side of the axial magnet yoke, the electromagnetic coil is fixedly arranged on the magnetic pole, and the heat dissipation base is arranged on the side, away from the magnetic pole, of the axial magnet yoke. Heat generated by the electromagnetic coil is conducted to the magnetic pole, the magnetic pole conducts the heat to the axial magnet yoke, the axial magnet yoke dissipates the heat into the atmosphere through the heat dissipation base, and the situation that the temperature of the magnetic bearing for the flywheel is too high in the using process is avoided. According to the heat dissipation capacity of the heat dissipation base, if the heat dissipation capacity of the heat dissipation base needs to be improved, the heat dissipation base can be made of aluminum alloy and copper materials with good heat conductivity.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel energy storage, in particular to a magnetic bearing heat dissipation device for a vacuum magnetic suspension flywheel. Background Art

[0002] Electromagnetic bearings are a device that uses electromagnetic force to suspend the rotor and can support the flywheel without contact. They have the advantages of being frictionless, long-lasting, and stable in operation. During operation, electromagnetic bearings apply a certain current to the magnetic bearing coil to generate electromagnetic attraction to achieve the suspended state of the flywheel rotor. Among them, if the flywheel is to be used as an energy storage medium, it must have a certain weight. In order for the flywheel to reach a suspended state, a certain current must be applied to the coil to keep the flywheel in a stable state. Under long-term operating conditions, the electromagnetic bearing will inevitably generate high heat, affecting the stable operation of the magnetic bearing. Conventional magnetic bearings dissipate heat by adding air ducts to the entire structure for heat dissipation, but the vacuum magnetic levitation flywheel magnetic bearing structure cannot use cooling air for heat dissipation.

[0003] Therefore, there is an urgent need for a device that can dissipate heat from the magnetic bearings of a vacuum magnetic levitation flywheel. Utility Model Content

[0004] In view of this, the present invention provides a heat dissipation base on the axial magnetic yoke to promote the transfer of heat generated by the electromagnetic coil and reduce the temperature of the axial magnetic yoke.

[0005] The technical solution of the present utility model is implemented as follows: a magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel includes an axial magnetic yoke, a magnetic pole and an electromagnetic coil, the magnetic pole is arranged on one side of the axial magnetic yoke, the electromagnetic coil is fixed on the magnetic pole, and also includes a heat dissipation base, which is arranged on the side of the axial magnetic yoke away from the magnetic pole.

[0006] On the basis of the above technical solution, preferably, a first hole is provided on the axial magnetic yoke, a fourth hole is provided on the magnetic pole, the radius of the first hole is equal to that of the fourth hole, and the axes of the first hole and the fourth hole coincide with each other.

[0007] On the basis of the above technical solution, preferably, a plurality of coil slots are provided in the magnetic pole, each of the coil slots is closed at the end, and the electromagnetic coil is provided in the coil slot.

[0008] On the basis of the above technical solution, preferably, the coil slot is filled with potting glue, and the potting glue fixes the electromagnetic coil in the coil slot.

[0009] On the basis of the above technical solution, preferably, a second hole is provided on the heat dissipation base, the radius of the second hole is equal to the radius of the first hole, and the axes of the first hole and the second hole coincide with each other.

[0010] On the basis of the above technical solution, preferably, the heat dissipation base is provided with a heat dissipation sealing cover, and the heat dissipation sealing cover is provided on a side of the heat dissipation base away from the axial magnetic yoke.

[0011] On the basis of the above technical solution, preferably, a first sealing strip and a second sealing strip are provided between the heat dissipation base and the heat dissipation sealing cover, the first sealing strip is provided around the heat dissipation base, and the second sealing strip is provided around the second hole.

[0012] On the basis of the above technical solution, preferably, a third hole is provided on the heat dissipation sealing cover, the radius of the third hole is equal to the radius of the second hole, and the axes of the third hole and the second hole coincide with each other.

[0013] On the basis of the above technical solution, preferably, the heat dissipation base is further provided with a heat dissipation flow channel, the heat dissipation flow channel is evenly arranged on the heat dissipation base, and a coolant is provided in the heat dissipation flow channel.

[0014] On the basis of the above technical solution, preferably, the heat dissipation base is further provided with a first communication port and a second communication port, and both the first communication port and the second communication port are connected to the heat dissipation channel.

[0015] The utility model provides a magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel, which has the following beneficial effects compared with the prior art:

[0016] The heat generated by the electromagnetic coil is transferred to the magnetic pole, which then transfers this heat to the axial magnetic yoke. The axial magnetic yoke then dissipates the heat into the atmosphere through the heat dissipation base, thus preventing the flywheel magnetic bearing from overheating during use. Based on the heat dissipation capacity of the heat dissipation base, it can be improved by using aluminum alloys and copper materials with better thermal conductivity.

[0017] The electromagnetic coil is arranged in the coil slot, which plays a role in protecting the electromagnetic coil and avoiding damage to the electromagnetic coil or short circuit or open circuit during use;

[0018] The potting compound uses AB component epoxy resin glue to fix the electromagnetic coil in the coil slot. The potting compound has good thermal conductivity and insulation, which can fully ensure that the heat generated by the electromagnetic coil when it is energized is transferred to the magnetic pole, while avoiding the risk of short circuit or open circuit of the electromagnetic coil.

[0019] A heat dissipation channel is set up in the heat dissipation base, and coolant is injected into the channel to improve the heat dissipation capacity of the heat dissipation base. Through water cooling, the electromagnetic bearing can achieve rapid heat exchange, reduce the temperature rise of the electromagnetic coil caused by continuous operation, and achieve the purpose of long-term stable operation of the magnetic bearing;

[0020] The first connecting port and the second connecting port are respectively a water inlet and a water return port. The coolant enters the heat dissipation channel from the first connecting port and then flows out from the second connecting port. Coolant with a lower temperature is always injected into the heat dissipation channel to improve the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a three-dimensional diagram of the partial structure of a magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to the present invention;

[0023] Figure 2 This is a cross-sectional view of a magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to the present invention;

[0024] Figure 3 This is a partial structural diagram of a magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to the present invention;

[0025] Figure 4 This is a schematic diagram of the water flow in the heat dissipation channel of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1-4 As shown, a heat dissipation device for a magnetic bearing used in a vacuum magnetic levitation flywheel comprises an axial magnetic yoke 1, a magnetic pole 11, and an electromagnetic coil 2. The magnetic pole 11 is disposed on one side of the axial magnetic yoke 1, and the electromagnetic coil 2 is fixedly mounted on the magnetic pole 11. The device also comprises a heat dissipation base 3 disposed on the side of the axial magnetic yoke 1 away from the magnetic pole 11. The heat generated by the electromagnetic coil 2 is transferred to the magnetic pole 11, which then transfers this heat to the axial magnetic yoke 1. The axial magnetic yoke 1 dissipates the heat to the atmosphere through the heat dissipation base 3, thereby preventing the flywheel magnetic bearing from overheating during use. Based on the heat dissipation capacity of the heat dissipation base 3, it can be improved by processing it from aluminum alloys or copper materials with good thermal conductivity.

[0028] The axial magnetic yoke 1 is provided with a first hole 12, and the magnetic pole 11 is provided with a fourth hole 111. The first hole 12 and the fourth hole 111 have the same radius and their axes coincide with each other. The first hole 12 and the fourth hole 111 serve as the suspension channel of the magnetic levitation flywheel.

[0029] The magnetic pole 11 is provided with a plurality of coil slots 112, each of which is closed at the end, and the electromagnetic coil 2 is disposed in the coil slot 112. The electromagnetic coil 2 is disposed in the coil slot 112 to protect the electromagnetic coil 2 and prevent damage to the electromagnetic coil 2 or short circuit or open circuit during use.

[0030] The coil slot 112 is filled with potting compound 4, which secures the electromagnetic coil 2 within the coil slot 112. The potting compound 4 not only secures the electromagnetic coil 2 but also conducts heat generated by the electromagnetic coil 2 to the magnetic pole 11. The potting compound 4, made of an AB component epoxy resin, secures the electromagnetic coil 2 within the coil slot 112. The potting compound 4 has excellent thermal conductivity and insulation properties, ensuring that heat generated by the electromagnetic coil 2 when energized is conducted to the magnetic pole 11 while preventing the risk of short circuits or disconnections in the electromagnetic coil 2.

[0031] The heat dissipation base 3 is provided with a second hole 34 . The radius of the second hole 34 is equal to the radius of the first hole 12 , and the axes of the first hole 12 and the second hole 34 coincide with each other.

[0032] The heat sink 3 is provided with a heat dissipation sealing cover 35, which is located on the side of the heat sink 3 away from the axial magnetic yoke 1. The heat dissipation sealing cover 35 protects the heat sink 3. The heat sink 3 and the heat dissipation sealing cover 35 are fastened together by bolts to achieve a sealing effect.

[0033] The heat dissipation base 3 and the axial magnetic yoke 1 can be fixed by bolts or by welding or other means that can transfer heat, and a layer of thermal conductive silicone grease is applied to the contact surfaces of the two to ensure that the two contact surfaces have good thermal conductivity. The heat generated by the electromagnetic coil 2 in the axial magnetic yoke 1 during operation can be dissipated in time through the heat dissipation base 3, thereby achieving the purpose of cooling.

[0034] To enhance the heat dissipation capability of the heat dissipation base 3, the base 3 is further provided with heat dissipation channels 33, which are evenly distributed throughout the base 3 and contain a coolant. Due to the high specific heat capacity of water, the heat dissipation channels 33 are provided within the base 3 and are filled with coolant to enhance the heat dissipation capability of the base 3. This water cooling method enables rapid heat exchange within the electromagnetic bearing, reduces the temperature rise of the electromagnetic coil 2 caused by continuous operation, and ensures the long-term stable operation of the magnetic bearing.

[0035] Because the heat dissipation channel 33 is filled with liquid, to prevent leakage from the heat dissipation channel 33 during long-term use, which could damage internal equipment and cause accidents, a first sealing strip 351 and a second sealing strip 352 are installed between the heat dissipation base 3 and the heat dissipation sealing cover 35. The first sealing strip 351 surrounds the heat dissipation base 3, while the second sealing strip 352 surrounds the second hole 34. This enhances sealing and prevents liquid leakage from the heat dissipation channel 33, which could cause safety accidents. Both the first sealing strip 351 and the second sealing strip 352 are fluororubber sealing rings.

[0036] The heat dissipation sealing cover 35 is provided with a third hole 353 . The radius of the third hole 353 is equal to the radius of the second hole 34 , and the axes of the third hole 353 and the second hole 34 coincide with each other.

[0037] The heat dissipation base 3 is further provided with a first communication port 31 and a second communication port 32 , both of which are connected to the heat dissipation channel 33 .

[0038] The first communication port 31 and the second communication port 32 are respectively a water inlet and a water return port. The coolant enters the heat dissipation channel 33 from the first communication port 31 and then flows out from the second communication port 32. Figure 4 As shown, the arrows indicate the circulation direction of the coolant, and coolant with a lower temperature is always injected into the heat dissipation channel 33 to improve the cooling effect.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel, comprising an axial magnetic yoke (1), a magnetic pole (11) and an electromagnetic coil (2), wherein the magnetic pole (11) is arranged on one side of the axial magnetic yoke (1), and the electromagnetic coil (2) is fixedly arranged on the magnetic pole (11), characterized in that: The heat dissipation device further comprises a heat dissipation base (3), which is arranged on a side of the axial magnetic yoke (1) away from the magnetic pole (11); a first hole (12) is arranged on the axial magnetic yoke (1), and a fourth hole (111) is arranged on the magnetic pole (11); the first hole (12) and the fourth hole (111) have the same radius, and the axes of the first hole (12) and the fourth hole (111) coincide with each other; a second hole (34) is arranged on the heat dissipation base (3), the radius of the second hole (34) is equal to the radius of the first hole (12), and the axes of the first hole (12) and the second hole (34) coincide with each other; the heat dissipation base (3) is provided with a heat dissipation sealing cover (35), and the heat dissipation sealing cover (35) is provided on a side of the heat dissipation base (3) away from the axial magnetic yoke (1); a heat dissipation flow channel (33) is further provided on the heat dissipation base (3), and the heat dissipation flow channel (33) is evenly arranged on the heat dissipation base (3), and a coolant is provided in the heat dissipation flow channel (33).

2. The magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to claim 1, characterized in that: A plurality of coil slots (112) are provided in the magnetic pole (11), each coil slot (112) is closed at the end, and the electromagnetic coil (2) is provided in the coil slot (112).

3. The magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to claim 2, characterized in that: The coil slot (112) is filled with potting glue (4), and the potting glue (4) fixes the electromagnetic coil (2) in the coil slot (112).

4. The magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to claim 1, wherein: A first sealing strip (351) and a second sealing strip (352) are provided between the heat dissipation base (3) and the heat dissipation sealing cover (35); the first sealing strip (351) is provided around the heat dissipation base (3), and the second sealing strip (352) is provided around the second hole (34).

5. The magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to claim 1, characterized in that: A third hole (353) is provided on the heat dissipation sealing cover (35), the radius of the third hole (353) is equal to the radius of the second hole (34), and the axes of the third hole (353) and the second hole (34) coincide.

6. The magnetic bearing heat dissipation device for a vacuum magnetic levitation flywheel according to claim 1, characterized in that: The heat dissipation base (3) is further provided with a first communication port (31) and a second communication port (32), and both the first communication port (31) and the second communication port (32) are connected to the heat dissipation channel (33).

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