JP2016211714A - Superconductive magnetic bearing for superconductive flywheel power storage system - Google Patents

Abstract

Provided is a superconducting magnetic bearing for a superconducting flywheel power storage system, which can float a flywheel without losing the SMB function by a coil power supply having a UPS function for a certain period of time even when the refrigerator is stopped. To do.
In a superconducting flywheel power storage system, a stator coil portion 8 formed by winding a high-temperature superconducting wire that has an electric resistance of zero below a liquid nitrogen temperature, and an inner tank container 4 that stores the rare gas helium of the refrigerant, In the superconducting magnetic bearing including the outer tank container 5 and the refrigerator for maintaining the vacuum space for minimizing heat intrusion into the inner tank container 4, the cold insulation mechanism 9 is provided adjacent to the stator coil portion 8.
[Selection] Figure 1

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 was possible to generate a strong magnetic field that levitated a heavy load of a flywheel of several tons.

JP 2008-249130 A JP 2012-007708 A

  However, no countermeasures have been taken in the event that the refrigerator is stopped due to a power failure or the like, and there has been a problem that low heat penetration and vibration countermeasures based on long-term continuous operation are not sufficient.

  In view of the above situation, the present invention can float a flywheel without losing the function of SMB by a coil power supply having an 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.

In order to achieve the above object, the present invention provides
[1] In a superconducting magnetic bearing for a superconducting flywheel power storage system, in the superconducting flywheel power storage system, a stator coil portion formed by winding a high-temperature superconducting wire having an electric resistance of zero below the liquid nitrogen temperature and the rare gas helium of the refrigerant In a superconducting magnetic bearing comprising an inner tank container for storing a vacuum, an outer tank container for maintaining a vacuum space for minimizing heat intrusion into the inner tank container, and a refrigerator, a cold insulation mechanism adjacent to the stator coil portion It is characterized by providing.

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

  [3] The superconducting magnetic bearing for a superconducting flywheel power storage system according to [1], wherein a thermal anchor of a current lead is connected adjacent to the cold insulation mechanism.

  [4] In the superconducting magnetic bearing for the superconducting flywheel power storage system according to [1] above, heat transfer with a gasket flange made of copper having a thickness of 2 mm made of copper so that both the inner and outer vacuum seals and heat transfer are compatible. It is characterized by incorporating a member.

  [5] The superconducting magnetic bearing for the superconducting flywheel power storage system according to [1] above, wherein the inner vessel is made of SUS / copper or SUS / aluminum so that heat transfer can be achieved with an internal and external vacuum seal. It consists of materials.

  [6] In the superconducting magnetic bearing for the superconducting flywheel power storage system according to [1], the pancake and the cooling plate constituting the stator coil are fastened to each other, and the interaction between the superconducting bulk on the rotor side and the stator coil is achieved. It has a mechanism capable of transmitting the accompanying load (reaction force) to the room temperature part.

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

  [8] The superconducting magnetic bearing for a superconducting flywheel power storage system according to [7], wherein the heat insulating member is a rod member obtained by solidifying an alumina fiber having a diameter of 7 to 25 μm with an epoxy resin.

  [9] The superconducting magnetic bearing for a superconducting flywheel power storage system according to [1], wherein a space of 2 mm or less is provided around the rotor portion, and a welding bellows is disposed on the outer periphery thereof.

  [10] The superconducting magnetic bearing for a superconducting flywheel power storage system according to [1] above, wherein a support member (anti-sway) having high heat insulation is installed from the outer tank container.

  According to the present invention, even if the refrigerator stops due to a power failure or the like, it is possible to safely stop the rotation by soft landing while supporting the heavy load of a flywheel of several tons class, etc. A superconducting magnetic bearing that can be operated is realized.

It is a block diagram of the superconducting magnetic bearing for superconducting flywheel electrical storage systems 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 a superconducting magnetic bearing for a superconducting flywheel power storage system. It is explanatory drawing of the stator coil of the superconducting magnetic bearing for superconducting flywheel electrical storage systems, and a cold insulation member. It is explanatory drawing of the thermal 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 an explosive material. It is explanatory drawing of a steadying mechanism structure. It is a cold insulation characteristic figure of the SMB structure of this invention.

  A superconducting magnetic bearing for a superconducting flywheel power storage system according to the present invention includes a stator coil portion formed by winding a high-temperature superconducting wire that has an electric resistance of zero below a liquid nitrogen temperature in the superconducting flywheel power storage system, and a rare gas helium of the refrigerant. In a superconducting magnetic bearing comprising an inner tank container for storing a vacuum, an outer tank container for maintaining a vacuum space for minimizing heat intrusion into the inner tank container, and a refrigerator, a cold insulation mechanism adjacent to the stator coil portion It was made to provide.

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

  FIG. 1 is a configuration diagram of a superconducting magnetic bearing for a superconducting flywheel energy storage system according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a superconducting magnetic bearing for a superconducting flywheel energy storage system, and FIG. FIG. 4 is an explanatory diagram of a stator coil and a cooling member of a superconducting magnetic bearing for a superconducting flywheel power storage system, and FIG. 5 is an ICF (gasket of a superconducting magnetic bearing for a superconducting flywheel power storage system. FIG. 6 is an explanatory diagram of a thermal contact configuration using an explosive material, and FIG. 7 is an explanatory diagram of an anti-sway mechanism configuration.

  In these drawings, 1 is a rotor part, 2 is a bellows joint, 3 is a heat insulating rod, 4 is an inner tank container, 5 is an outer tank container, 6 is a reaction force transmission mechanism, 7 is a current lead thermal anchor, and 8 is a stator coil. , 9 is a cold insulation mechanism, 10 is an ICF / explosive material, 11 is a steadying mechanism, and 12 is a refrigerator.

In FIG. 2, 13 is a coil storage container, 14 is a coil cooling member, 15 is a current lead (PL) composed of PL (+) 15A and PL (−) 15B, 16 is a PL vacuum terminal, and 17 is always equipped with a UPS. An energizing power source 18 is a thermal contact portion.
In FIG. 3, 20 is a cold insulation member (copper, copper alloy), 21 is a heat anchor member, 22 is a PL anchor, and 23 is a cooling plate (heat transfer flexible).
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 copper coil cooling member 14 are laminated and mutually fastened with bolts 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 capable of achieving both vacuum separation and heat transfer.
Further, in FIG. 6, the explosive material made of aluminum 24 and SUS25 realizes a configuration that can achieve both vacuum separation and heat transfer.
In FIG. 7, 41 is an FRP rod (heat insulating 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 insulating member), and 46 is a rod fixing nut. , 47 is a fixing member, and 48 is a vacuum cap. Here, the steady rest mechanism realizes a configuration that can achieve both vibration reduction of the inner tank while insulating from the outer tank.

  As described above, according to the present invention, in the superconducting flywheel power storage system, the stator coil portion 8 configured by winding the high-temperature superconducting wire having an electric resistance of zero below the liquid nitrogen temperature and the refrigerant containing the rare gas helium are accommodated. 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 intrusion into the inner tank container 4, a cold insulation is provided adjacent to the stator coil portion 8. A mechanism 9 is provided. The main material of the cold insulation mechanism 9 is made of copper or a copper alloy.

  Further, the current lead thermal anchor 7 is connected to the cold insulation mechanism 9 of the stator coil portion 8.

  Therefore, in the stator coil structure, even if the refrigerator stops, the flywheel can be levitated without losing the SMB function by the coil power supply having the UPS function for a certain time required for soft landing. it can.

  In addition, in the inner tank container 4 that stores the stator coil portion 8 and the rare gas helium of the refrigerant, a copper flange flange with a thickness of 2 mm made of copper is provided so as to achieve both heat transfer and vacuum sealing inside and outside the inner tank container 4. A heat transfer member 10 was incorporated.

  The inner tank container 4 that stores the stator coil portion 8 and the rare gas helium as the refrigerant has an explosive material made of SUS / aluminum so as to achieve both heat transfer and vacuum sealing inside and outside the inner tank container 4.

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

  A 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 by the interaction between the superconducting bulk on the rotor side and the stator coil portion 8 to the normal temperature portion. That is, it is configured to achieve both 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 having a diameter of 7 to 25 μm with an epoxy resin, a heat insulating member having low heat penetration and high strength. Therefore, the heat insulation rod 3 with high heat insulation and high strength can be obtained.

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

  In addition, an anti-sway mechanism 11 including a support member having high heat insulating properties and a spring portion capable of absorbing the heat shrinkage difference is installed from the outer tank container 5. In this way, measures against vibrations in the inner tank that houses the SMB stator coil were also taken.

  FIG. 8 is a cooling characteristic diagram of the SMB configuration of the present invention, and even if the refrigerator stops, it can be operated for nearly two and a half hours as shown in FIG.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The superconducting magnetic bearing for the superconducting flywheel power storage system of the present invention can float the flywheel without losing the SMB function by a coil power supply having a 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 Thermal insulation rod 4 Inner tank container 5 Outer tank container 6 Reaction force transmission mechanism 7 Current lead heat 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 made of heat member / explosive material 11 Stabilizing mechanism 12 Refrigerator 13 Coil storage container 14 Coil cooling member 15 Current lead (PL)
15A PL (+)
15B PL (-)
16 PL vacuum terminal 17 Continuously energized power supply with UPS 18 Thermal contact part 20 Cooling member (copper, copper alloy)
21 Heat 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 body 32 Vacuum seal fixing flange 33 Vacuum seal part 41 FRP rod (heat insulation 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 (10)

  In the superconducting flywheel power storage system, a stator coil portion configured by winding a high-temperature superconducting wire that has an electric resistance of zero below the liquid nitrogen temperature, an inner tank container that stores the rare gas helium of the refrigerant, and the inner tank container For a superconducting flywheel power storage system, characterized in that in the superconducting magnetic bearing comprising an outer tank container and a refrigerator for maintaining a vacuum space for minimizing heat intrusion, a cold insulation mechanism is provided adjacent to the stator coil section. Superconducting magnetic bearing.   2. A superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein the main material of the cold insulation mechanism is made of copper or a copper alloy.   2. A superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein a thermal anchor of a current lead is connected adjacent to the cold insulation mechanism.   The superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein a heat transfer member with a gasket flange made of copper and having a thickness of 2 mm is incorporated so that a vacuum seal inside and outside the inner tank container can be compatible with heat transfer. A superconducting magnetic bearing for a superconducting flywheel power storage system.   The superconducting magnetic bearing for the superconducting flywheel power storage system according to claim 1, wherein the inner tank container is made of an explosive material made of SUS / copper or SUS / aluminum so that heat transfer can be achieved with a vacuum seal inside and outside the inner vessel. A superconducting magnetic bearing for a superconducting flywheel power storage system.   The superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein the pancake and the cooling plate constituting the stator coil are fastened to each other, and the load generated due to the interaction between 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 (reaction force) to a normal temperature part.   7. A superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 6, wherein a low heat is applied to a part of a mechanism capable of transmitting a load (reaction force) generated due to an interaction between the superconducting bulk on the rotor side and the stator coil to a normal temperature part. A superconducting magnetic bearing for a superconducting flywheel power storage system, wherein an intruding and high-strength heat insulating member is installed.   8. The superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 7, wherein the heat insulating member is a rod member obtained by solidifying an alumina fiber having a diameter of 7 to 25 [mu] m with an epoxy resin. Magnetic bearing.   2. A superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein a space of 2 mm or less is provided around the rotor portion and a welding bellows is disposed on the outer periphery thereof. Magnetic bearing.   The superconducting magnetic bearing for a superconducting flywheel power storage system according to claim 1, wherein a support member (anti-sway) having high heat insulation is installed from the outer tank container.

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