JP6535210B2 - Superconducting Magnetic Bearing for Superconducting Flywheel Storage System - Google Patents

Description

  The present invention relates to a superconducting magnetic bearing (SMB) for a superconducting flywheel power storage system.

  Even with conventional superconducting magnetic bearings, it has been possible to generate a strong magnetic field that raises the heavy load of several ton-class flywheels.

JP, 2008-249130, A JP 2012-007708 A

  However, no measures have been taken in case the refrigerator is shut down due to a power failure or the like, and there is also a problem that low heat intrusion and vibration measures based on long-term continuous operation are not sufficient.

  In view of the above situation, the present invention can float the flywheel without losing the function of SMB by the coil power supply having the uninterruptible power (UPS) function for a certain period of time, even when the refrigerator is stopped. An object of the present invention is to provide a superconducting magnetic bearing for a superconducting flywheel power storage system.

The present invention achieves the above object by
[1] In a superconducting magnetic bearing for a superconducting flywheel storage system, a stator coil portion formed by winding a high temperature superconducting wire whose electric resistance becomes zero at liquid nitrogen temperature or less in the superconducting flywheel storage system and rare gas helium of the refrigerant A superconducting magnetic bearing comprising an inner vessel containing the inner vessel and an outer vessel and a refrigerator for maintaining a vacuum space for minimizing heat penetration into the inner vessel; a cooling mechanism adjacent to the stator coil portion; To connect the thermal anchor of the current lead that supplies the current from the power supply with the function of the uninterruptible power supply to the stator coil portion adjacent to the cooling mechanism, and also when the refrigerator is stopped It is characterized in that it is possible to continue driving .

  [2] The superconducting magnetic bearing for a superconducting flywheel power storage system according to the above [1], wherein the main material of the cold storage mechanism is made of copper or a copper alloy.

  [4] In the superconducting magnetic bearing for a superconducting flywheel power storage system according to the above [1], the heat transfer with a gasket flange made of copper and having a thickness of 2 mm is possible so that the vacuum seal and heat transfer inside and outside the inner tank can be compatible. A member is incorporated.

  [5] In the superconducting magnetic bearing for a superconducting flywheel power storage system according to the above-mentioned [1], explosive bonding made of SUS / copper or SUS / aluminum so that the vacuum seal and heat transfer inside and outside the inner tank can be compatible It is characterized by being made of wood.

  [6] In the superconducting magnetic bearing for a superconducting flywheel power storage system according to the above [1], the pancake and the cooling plate constituting the stator coil are mutually fastened and the interaction between the superconducting bulk on the rotor side and the stator coil It is characterized in that it has a mechanism capable of transmitting a load (reaction force) generated along with it to the normal temperature part.

  [7] In the superconducting magnetic bearing for a superconducting flywheel power storage system according to the above-mentioned [6], a mechanism capable of transmitting the load (reaction force) generated with the interaction of the superconducting bulk on the rotor side and the stator coil to a room temperature part It is characterized in that a heat insulating member with low heat penetration and high strength is installed in part.

  [8] The superconducting magnetic bearing for a superconducting flywheel power storage system according to [7] above, characterized in that the heat insulating member is a rod member in which an alumina fiber having a diameter of 7 to 25 μm is solidified with an epoxy resin.

  [9] A superconducting magnetic bearing for a superconducting flywheel power storage system according to the above [1], characterized in that a separated space of 2 mm or less is provided around the rotor portion and a welding bellows is disposed on the outer peripheral portion.

  [10] The superconducting magnetic bearing for a superconducting flywheel power storage system according to the above [1], characterized in that a support member (swaying stopper) having high thermal insulation is installed from the outer tank container.

  According to the present invention, even if the refrigerator stops in the event of a power failure, etc., it becomes possible to safely carry out soft landing while supporting a large load of several ton class flywheel and stop rotation, etc. It is possible to realize a superconducting magnetic bearing that is compatible with operation.

It is a block diagram of the superconducting magnetic bearing for the superconducting flywheel electrical storage system which shows the Example of this invention. It is a schematic block diagram of the superconducting magnetic bearing for superconducting flywheel electrical storage systems. It is a current lead (PL) anchor block diagram of the superconducting magnetic bearing for superconducting flywheel electrical storage systems. It is an explanatory view of a stator coil and a cold storage member of a superconducting magnetic bearing for a superconducting flywheel power storage system. It is explanatory drawing of the heat contact structure of ICF (heat transfer member with a gasket flange) of the superconducting magnetic bearing for superconducting flywheel electrical storage systems. It is explanatory drawing of the thermal contact structure by a explosive bonding material. It is explanatory drawing of a steady stop mechanism structure. It is a cold-cooling characteristic figure of the SMB structure of this invention.

  A superconducting magnetic bearing for a superconducting flywheel storage system according to the present invention is a superconducting coil storage system for a superconducting flywheel storage system, including a stator coil portion formed by winding a high temperature superconducting wire whose electric resistance is zero at liquid nitrogen temperature or less and rare gas helium of the refrigerant. A superconducting magnetic bearing comprising an inner vessel containing the inner vessel and an outer vessel and a refrigerator for maintaining a vacuum space for minimizing heat penetration into the inner vessel; a cooling mechanism adjacent to the stator coil portion; Was set up.

  Hereinafter, embodiments of the present invention will be described in detail.

  1 is a block diagram of a superconducting magnetic bearing for a superconducting flywheel storage system showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a superconducting magnetic bearing for a superconducting flywheel storage system, and FIG. 3 is a superconductor for a superconducting flywheel storage system Current lead (PL) anchor configuration diagram of magnetic bearing, Fig. 4 is an explanatory view of stator coil and cold storage member of superconducting magnetic bearing for superconducting flywheel storage system, Fig. 5 is ICF (gasket of superconducting magnetic bearing for superconducting flywheel storage system) FIG. 6 is an explanatory view of a heat contact structure by a detonation material, and FIG. 7 is an explanatory view of a shake mechanism structure.

  In these figures, 1 is a rotor, 2 is a bellows joint, 3 is a heat insulation rod, 4 is an inner vessel, 5 is an outer vessel, 6 is a reaction force transmission mechanism, 7 is a current lead thermal anchor, and 8 is a stator coil Reference numeral 9 is a cold storage mechanism, 10 is an ICF / bombardment material, 11 is a steadying mechanism, and 12 is a refrigerator.

Further, in FIG. 2, 13 is a coil storage container, 14 is a coil cold insulating member, 15 is a current lead (PL) consisting of PL (+) 15A and PL (-) 15B, 16 is a PL vacuum terminal, and 17 is UPS always. An energizing power source 18 is a thermal contact portion.
Further, in FIG. 3, 20 is a cold insulating member (copper, copper alloy), 21 is a heat anchor member, 22 is a PL anchor, and 23 is a cooling plate (heat transfer flexible).
Further, in FIG. 4, 8A is a coil winding portion, 8B is a stator coil, and 8C is a coil case. Here, the stator coil 8B and the coil insulating member 14 made of copper are stacked and mutually fastened with a bolt or the like.
Further, in FIG. 5, 31 is an ICF main body, 32 is a vacuum seal fixing flange, 33 is a vacuum seal portion, 23A is a heat transfer flexible (refrigerator side), and 23B is a heat transfer flexible (coil side). Here, the copper ICF realizes a configuration in which both vacuum separation and heat transfer can be achieved.
Moreover, in FIG. 6, the explosive bonding material which consists of aluminum 24 and SUS25 implement | achieves the structure which can make a vacuum separation and heat transfer compatible.
Further, in FIG. 7, 41 is an FRP rod (heat insulation member), 42 is a disc spring, 43 is a vacuum seal (O ring), 44 is a low temperature side contact member, 45 is an FRP pipe (heat insulation member), 46 is a rod fixing nut , 47 is a fixing member, and 48 is a vacuum cap. Here, the anti-vibration mechanism realizes a configuration capable of achieving both the vibration reduction of the inner tank and the heat insulation from the outer tank.

  As described above, in the present invention, the stator coil portion 8 constructed by winding the high temperature superconducting wire whose electric resistance is zero at the liquid nitrogen temperature or less and the rare gas helium of the refrigerant thereof in the superconducting flywheel electric storage system In a superconducting magnetic bearing comprising a tank container 4 and an outer tank container 5 and a refrigerator 12 for maintaining a vacuum space for minimizing heat penetration into the inner tank container 4, cooling is performed adjacent to the stator coil portion 8 The mechanism 9 was provided. The main material of the cooling mechanism 9 is made of copper or copper alloy.

  In addition, the current lead thermal anchor 7 is connected to the cooling mechanism 9 of the stator coil portion 8.

  Therefore, in the stator coil structure, even if the refrigerator is stopped, the flywheel power can be levitated without losing the function of the SMB by the coil power supply having the UPS function for a fixed time necessary for soft landing. it can.

  In addition, with the stator coil portion 8 and the inner vessel 4 for containing the rare gas helium of the refrigerant, with a gasket flange made of copper and having a thickness of 2 mm so that the vacuum seal and heat transfer inside and outside the inner vessel 4 can be compatible. The heat transfer member 10 was incorporated.

  In the inner tank 4 containing the stator coil portion 8 and the rare gas helium of the refrigerant, an explosive bonding material made of SUS / aluminum is provided so that the vacuum seal and heat transfer inside and outside the inner tank 4 can be compatible.

  A mechanism capable of mutually fastening the stator coil portion 8 and the dilute cake of the refrigerant and the cooling plate, and transmitting the load (reaction force) generated with the interaction of the superconducting bulk on the rotor side and the stator coil portion 8 to the normal temperature portion Have.

  The heat insulating member with low heat penetration and high strength is installed in a part of the mechanism capable of transmitting the load (reaction force) generated due to the interaction between the superconducting bulk on the rotor side and the stator coil portion 8 to the normal temperature portion. In other words, the configuration is compatible with the reaction force transmission applied to the stator coil and the low heat penetration.

  The heat insulating rod 3 (rod member) was manufactured by solidifying an alumina fiber with a diameter of 7 to 25 μm with an epoxy resin as a heat insulating member with low heat penetration and high strength. Therefore, the heat insulation rod 3 can be obtained with high heat insulation and high strength.

  Also, as a labyrinth structural member for the purpose of low heat penetration of the superconducting magnetic bearing rotor (heat insulation shaft), a separated space of 2 mm or less is provided around the rotor portion 1, and the bellows joint (welded bellows) 2 is disposed on the outer peripheral portion. I did it.

  Moreover, the anti-vibration mechanism 11 which consists of a supporting member with high thermal insulation from the outer tank container 5 and a spring part which can absorb a thermal contraction difference was installed. In this way, vibration measures of the inner tank housing the stator coil of the SMB are also taken.

  FIG. 8 is a diagram showing a cold storage characteristic of the SMB configuration of the present invention, and even if the refrigerator is stopped, as shown in FIG.

  The present invention is not limited to the above-described embodiments, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

  The superconducting magnetic bearing for the superconducting flywheel energy storage system of the present invention can float the flywheel without losing the SMB function by the coil power supply having the UPS function for a certain period of time even when the refrigerator is stopped. It can be used as a superconducting magnetic bearing for a flywheel power storage system.

DESCRIPTION OF SYMBOLS 1 rotor part 2 bellows joint 3 heat insulation rod 4 inner tank container 5 outer tank container 6 reaction force transmission mechanism 7 electric current lead thermal anchor 8 stator coil part 8A coil winding part 8B stator coil 8C coil case 9 cooling mechanism 10 transmission with gasket flange Heat transfer member consisting of heat member / explosive bond member 11 Anti-slip mechanism 12 Refrigerator 13 Coil storage container 14 Coil cold storage member 15 Current lead (PL)
15A PL (+)
15B PL (-)
16 PL Vacuum Terminal 17 UPS with UPS Constant Power Supply 18 Thermal Contact Part 20 Cold Insulating Member (Copper, Copper Alloy)
21 thermal anchor member 22 PL anchor 23 cooling plate (heat transfer flexible)
23A heat transfer flexible (refrigerator side)
23B Heat transfer flexible (coil side)
24 Aluminum 25 SUS
31 ICF main body 32 vacuum seal fixing flange 33 vacuum seal portion 41 FRP rod (heat insulating member)
42 Disc spring 43 Vacuum seal (O ring)
44 Low temperature side contact member 45 FRP pipe (heat insulation member)
46 rod fixing nut 47 fixing member 48 vacuum cap

Claims (9)

A stator coil portion formed by winding a high temperature superconducting wire whose electric resistance becomes zero at liquid nitrogen temperature or less and an inner tank container containing rare gas helium of the refrigerant in a superconducting flywheel electric storage system, and an inner tank container In a superconducting magnetic bearing comprising an outer vessel and a refrigerator for maintaining a vacuum space for minimizing heat penetration, a current- saving mechanism is provided adjacent to the stator coil portion, and a current from a power supply having an uninterruptible power supply function. And a thermal anchor of a current lead for supplying the stator coil portion to the stator coil portion adjacently connected to the cooling mechanism, and operation of the superconducting magnetic bearing can be continued even when the refrigerator is stopped. Superconducting magnetic bearings for wheel storage systems.   The superconducting magnetic bearing for a superconducting flywheel electric storage system according to claim 1, wherein the main material of the cold storage mechanism is made of copper or a copper alloy.   In the superconducting magnetic bearing for a superconducting flywheel electric storage system according to claim 1, a heat transfer member with a gasket flange made of copper and having a thickness of 2 mm is incorporated so that the vacuum seal and heat transfer inside and outside the inner vessel can be compatible. A superconducting magnetic bearing for a superconducting flywheel storage system characterized in that   The superconducting magnetic bearing for the superconducting flywheel electric storage system according to claim 1, wherein the heat transfer can be compatible with the vacuum seal inside and outside of the inner vessel and made of SUS / copper or SUS / aluminum. A superconducting magnetic bearing for a superconducting flywheel electric storage system characterized by The superconducting magnetic bearing for a superconducting flywheel storage battery system according to claim 1, wherein the pancake and the cooling plate constituting the stator coil are mutually fastened, and a load generated with the interaction of the superconducting bulk on the rotor side and the stator coil. A superconducting magnetic bearing for a superconducting flywheel power storage system characterized by having a mechanism capable of transmitting a weight to a normal temperature part. A superconducting flywheel energy storage superconducting magnetic bearing system according to claim 5, the adiabatic member on a part of the transmission mechanism capable of loading heavy generated along with the interaction of the rotor side of the superconducting bulk and stator coil to room temperature unit A superconducting magnetic bearing for a superconducting flywheel storage system characterized in that it is installed. The superconducting magnetic bearing for a superconducting flywheel electric storage system according to claim 6 , wherein the heat insulating member comprises a rod member in which an alumina fiber having a diameter of 7 to 25 m is solidified with an epoxy resin. Magnetic bearing.   A superconducting magnetic bearing for a superconducting flywheel electric storage system according to claim 1, wherein a separated space of 2 mm or less is provided around the rotor portion and a welding bellows is disposed on the outer peripheral portion thereof. Magnetic bearing. In claim 1 superconducting fly superconducting magnetic bearing wheel power storage system according superconducting flywheel energy storage system for a superconducting magnetic bearings, characterized in that they have installed the outer tub container or al supporting lifting member.

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