JP2017096430A - Superconductive magnetic bearing for superconductive flywheel storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superconductive magnetic bearing of a load supporting body for the superconductive magnetic bearing in which a large-scaled supporting tower exclusive for a power generating motor is not required by making a constitution of a system in which an applied floating force acts to tension side, i.e. a hanging-up float can be carried and further the device can be substantially simplified and an arrangement of a freezer on the superconductive magnetic floating mechanism is placed on the upper part of the device and efficient maintenance work can be attained.SOLUTION: In this invention, a superconductive magnetic bearing for a superconductive flywheel storage device is constituted in such a way that each of a center of a superconductive bulk 2 and a center of a rotating shaft is coincided to each other, an applied magnetic field is applied to the supper conductive bulk 2 and there are arranged a load supporting body 1 comprised of an alumina rod for hanging-up a flywheel 4 and a heat insulation pipe, and a superconductive coil 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a superconducting magnetic bearing for a superconducting flywheel power storage device, and more particularly to a superconducting magnetic bearing for a superconducting flywheel power storage device that can be lifted and floated.

  Conventionally, a superconducting magnetic bearing has been designed with a superconducting magnetic bearing for a superconducting flywheel power storage device in which the applied levitation force acts on the compression side, that is, can be pushed up, in a load support composed of a REBCO coil and a REBCO bulk. .

  FIG. 3 is a schematic diagram of a conventional superconducting flywheel power storage device incorporating a superconducting magnetic bearing, FIG. 4 is a front view of the conventional superconducting flywheel power storage device substituted for a drawing, and FIG. It is a photograph.

  In these drawings, 101 is a shaft member, 102 is a superconducting coil disposed in the lower part, 103 is a superconducting bulk disposed to face the superconducting coil 102, 104 is a lower vacuum container (outer tank container), and 105 is a shaft member. A flywheel fixed to 101, 106 is an upper vacuum container (outer tank container), 107 is a vacuum seal, 108 is a generator motor provided at the upper end of the shaft member 101, 109 is a refrigerator, and 110 is a compressor.

  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, if the refrigerator stops due to a power outage, etc., it must work in a limited space in the lower pit part of the flywheel device with a height of several meters. However, there was a problem that the regular maintainability was not good.

  Moreover, as shown in FIG.4 and FIG.5, the large support and the tower only for generator motors are required, and also, as shown in FIG. 1, arrangement | positioning of the high voltage | pressure piping to a superconducting magnetic levitation mechanism will be dozens of meters. There was a problem.

  In view of the above situation, the present invention constitutes a superconducting magnetic bearing for a superconducting flywheel power storage device in which the applied levitation force acts on the pulling side, that is, can be lifted and levitated, and does not require a large support dedicated for the generator motor Therefore, the superconducting magnetic bearing for the superconducting flywheel power storage device can be simplified, and the placement of the refrigerator on the superconducting magnetic levitation mechanism is at the top of the device, so that maintenance efficiency can be improved. The purpose is to provide.

In order to achieve the above object, the present invention provides
[1] In a superconducting magnetic bearing for a superconducting flywheel power storage device, a load support composed of an alumina rod and a heat insulating pipe that suspends the flywheel by applying an applied magnetic field to the superconducting bulk by aligning the center of the superconducting bulk with the center of the rotating shaft. The body and the superconducting coil are arranged.

  [2] In the superconducting magnetic bearing for a superconducting flywheel power storage device as described in [1] above, a superconducting large bulk having a diameter of 120 mm or more and a superconducting small bulk having a diameter of 100 mm or less are built in the upper portion of the load support. Features.

  [3] The superconducting magnetic bearing for a superconducting flywheel power storage device according to [1] above, wherein the load support is composed of an FRP rod and an FRP thin-walled pipe having excellent heat insulation and high strength.

  [4] The superconducting magnetic bearing for a superconducting flywheel power storage device according to [3] above, wherein the FRP rod having excellent heat insulation and high strength is made of an alumina fiber and an epoxy resin.

  [5] The superconducting magnetic bearing for a superconducting flywheel power storage device according to [3], wherein the FRP thin-walled pipe is made of glass fiber cloth and epoxy resin.

  According to the present invention, a superconducting magnetic bearing for a superconducting flywheel power storage device does not require a large support or backlash dedicated to a generator motor, greatly simplifies the device, and is a refrigerator for a superconducting magnetic levitation mechanism. Since the arrangement of the upper part is the upper part of the apparatus, maintenance efficiency can be improved.

It is a schematic diagram of a superconducting flywheel power storage device provided with the superconducting magnetic bearing of the present invention. It is a longitudinal cross-sectional view of the superconducting magnetic bearing for superconducting flywheel power storage devices of the present invention. It is a schematic diagram of a conventional non-lifting type superconducting flywheel power storage device incorporating a superconducting magnetic bearing. It is a front photograph of the conventional superconducting flywheel power storage device substituted for a drawing. It is a top view photograph of the conventional superconducting flywheel power storage device substituted for a drawing.

  A superconducting magnetic bearing for a superconducting flywheel power storage device according to the present invention is a load support comprising an alumina rod and a heat insulating pipe, each of which has a superconducting bulk and a center of a rotating shaft that coincide with each other, applies an applied magnetic field to the superconducting bulk, and lifts the flywheel. A body and a superconducting coil are arranged.

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

  FIG. 1 is a schematic diagram of a superconducting flywheel power storage device provided with a superconducting magnetic bearing of the present invention.

  In this figure, 1 is a load support made of high-strength alumina rod and heat insulation pipe, 2 is a superconducting bulk fixed to the upper end of the load support 1, and 3 is a superconducting bulk 2 and an axis. A superconducting coil that generates a strong magnetic field that applies an applied magnetic field to the superconducting bulk 2 and generates a strong magnetic field that lifts the load support 1, 4 is a flywheel fixed to the load support 1, and 5 is a vacuum container (outer tank container). , 6 is a vacuum seal, 7 is a generator motor provided at the lower end of the rotating shaft of the flywheel 4, 8 is an upper vacuum vessel, 9 is an inner tank vessel, 10 is a refrigerator, and 10A is a compressor.

  Incidentally, the vacuum seal 6 exists only between the flywheel 4 and the generator motor 7. There is no partition between the superconducting magnetic bearing portion (inside the inner tank) and the vacuum vessel 5 of the flywheel 4, and it is observed with dilute helium gas of about 10 Pa (about 1/10000 of atmospheric pressure). The refrigerator 10 directly cools the inner tank container 9, and the bulks are cooled with helium gas.

  FIG. 2 is a longitudinal sectional view of a superconducting magnetic bearing for a superconducting flywheel power storage device according to the present invention.

  In this figure, 11 is an excellent heat insulating and high strength alumina rod (diameter 24 mm), 12 is an upper flange made of SUS, 13 is a superconducting large bulk fixed to the alumina rod 11 and mainly responsible for levitation force, and 14A and 14B are superconducting. Superconducting small bulk fixed to the lower part of the large bulk and mainly responsible for guiding force, 15A to 15C are superconducting large by aligning the axis with the superconducting large bulk 13 and the superconducting small bulks 14A and 14B fixed to the lower part of the superconducting large bulk. An applied magnetic field is applied to the bulk 13 and the superconducting small bulks 14A and 14B, and the alumina rod 11 is lifted by the repulsive force (high temperature superconducting coil made of REBCO-based superconductor), 16 is a lower flange, and 17 is the alumina rod 11 Fixing bolt provided at the lower end, 18 is a GFRP thin-walled pipe constituting the load support 1 A.

  As described above, the superconducting magnetic bearing for the superconducting flywheel power storage device according to the present invention has the superconducting large bulk 13 and the superconducting small bulks 14A and 14B fixed to the lower part of the superconducting large bulk 13 in the same axis. An applied magnetic field was applied to the bulk 13 and the superconducting small bulks 14A and 14B, and the load support 1 and the superconducting coils 15A to 15C for lifting the flywheel 4 were arranged.

  According to the present invention, a large-scale support or wobble dedicated to a generator motor as shown in FIGS. 4 and 5 is unnecessary, and the apparatus can be greatly simplified. Further, since the refrigerator is arranged on the superconducting magnetic levitation mechanism at the upper part of the apparatus, maintenance efficiency can be improved.

  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 present invention eliminates the need for large-scale superconducting magnetic bearing support and backlash, and can be simplified. Further, the present invention can be used as a superconducting magnetic bearing for a superconducting flywheel power storage device that can simplify the arrangement of the refrigerator in the superconducting magnetic levitation mechanism and can improve the efficiency of maintenance.

DESCRIPTION OF SYMBOLS 1 Load support body 2 Superconducting bulk 3 Superconducting coil 4 Flywheel 5 is a vacuum container (outer tank container)
6 Vacuum seal
7, 17 Generator motor 8 Upper vacuum vessel 9 Inner tank vessel 10 Refrigerator 10A Compressor 11 Alumina rod 12 Upper flange 13 Superconducting large bulk 14A, 14B Superconducting small bulk 15A-15C Superconducting coil 16 Lower flange (flywheel rotating shaft)
18 GFRP thin-walled pipe constituting the load support

Claims (5)

  The superconducting bulk and the center of the rotating shaft are made to coincide with each other, an applied magnetic field is applied to the superconducting bulk, and a load support body and a superconducting coil composed of an alumina rod and a heat insulating pipe for lifting a flywheel are arranged. A superconducting magnetic bearing for a superconducting flywheel power storage device.   The superconducting magnetic bearing for a superconducting flywheel power storage device according to claim 1, wherein a superconducting large bulk having a diameter of 120 mm or more and a superconducting small bulk having a diameter of 100 mm or less are built in the upper part of the heat-insulating load support. Superconducting magnetic bearing for superconducting flywheel power storage device.   2. The superconducting magnetic bearing for a superconducting flywheel power storage device according to claim 1, wherein the heat insulating load support is composed of a high strength FRP rod and a thin FRP pipe with excellent heat insulating properties. Superconducting magnetic bearing for equipment.   4. The superconducting magnetic bearing for a superconducting flywheel power storage device according to claim 3, wherein the FRP rod having excellent heat insulation and high strength is made of alumina fiber and epoxy resin. bearing.   4. A superconducting magnetic bearing for a superconducting flywheel power storage device according to claim 3, wherein the FRP thin pipe is made of glass fiber cloth and epoxy resin.

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