JP2011176905A - Non-contact unit cooling device by radiation of flywheel for power storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact unit cooling device by radiation of a flywheel for power storage which reduces an energy loss by a windage loss caused by conduction cooling of a lean gas, improves efficiency of a flywheel system, and reduces labor for pressure adjustment at introduction of the lean gas through heat transfer by radiation. <P>SOLUTION: The non-contact unit cooling device by radiation of a flywheel for power storage includes a rotation-side heat exchanger plate 22 mounted to a rotating shaft 24 of the flywheel for power storage and a fixed-side heat exchanger plate 28 opposing the rotation-side heat exchanger plate 22, thus increasing a heat transfer area by radiation between the rotation-side heat exchanger plate 22 and the fixed-side heat exchanger plate 28. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a non-contact part cooling device, and more particularly to a non-contact part cooling device by radiation of a power storage flywheel.

Conventionally, a system using a superconductor has been developed as a bearing for a power storage flywheel that converts surplus power into kinetic energy, accumulates it, and takes it out as electrical energy when necessary. At this time, it is necessary to cool the superconductor of the flywheel that floats without contact.
FIG. 6 is a schematic diagram of a conventional superconducting power storage flywheel.
In the superconducting power storage flywheel shown in FIG. 6, a power storage flywheel 105 whose drive power is connected to and separated from the generator / motor 113 via an electromagnetic clutch 114 is provided in the low-temperature / vacuum vessel 101 by the vacuum pump 110. The rotating shaft 106 is cooled by the refrigerator 111 and the cooling plate 102 and is placed in a low temperature / lean gas atmosphere. The floating bulk body 107 and the guiding bulk bodies 108 and 109, and the floating superconducting coil In the cooling device for the superconducting magnetic bearing maintained in a non-contact state by the superconducting coil 104 and the guide superconducting coils 104 and 104 ′, heat transfer by gas molecule conduction becomes dominant from the pressure region where heat transfer by radiation is dominant. A pressure is set in the vicinity of the pressure to cool the magnetic bearing.

JP 2009-264495 A

In the above-described conventional conductive cooling with a rare gas (see Patent Document 1), the wind loss due to the rare gas becomes an energy loss, which may reduce the efficiency of the flywheel system.
In addition, when introducing the dilute gas, it is necessary to finely adjust the pressure in order to prevent heat loss while ensuring heat transfer.

  In view of the above situation, the present invention reduces an energy loss due to windage loss due to conduction cooling of a rare gas, and can reduce labor related to pressure adjustment at the time of introducing a rare gas. An object of the present invention is to provide a non-contact part cooling device by radiation of the above.

In order to achieve the above object, the present invention provides
[1] In a non-contact part cooling apparatus by radiation of a power storage flywheel, a rotation side heat transfer plate attached to a rotating shaft of the power storage flywheel, and a fixed side heat transfer plate facing the rotation side heat transfer plate The heat transfer area by radiation between the rotation side heat transfer plate and the fixed side heat transfer plate is increased.

[2] In the non-contact part cooling apparatus by radiation of the power storage flywheel according to [1], the rotation side heat transfer plate is a plurality of rotation side cylindrical heat transfer plates fixed to a rotation lid, The fixed-side heat transfer plate is a plurality of fixed-side cylindrical heat transfer plates arranged to face the plurality of rotation-side cylindrical heat transfer plates.
[3] In the non-contact part cooling apparatus by radiation of the power storage flywheel as described in [2] above, the plurality of rotating side cylindrical heat transfer plates and the plurality of fixed side cylindrical heat transfer plates are matted black It is characterized by painting.

[4] In the non-contact part cooling apparatus by radiation of the power storage flywheel as described in [1] above, the rotation side heat transfer plates are a plurality of rotation side disk-shaped heat transfer plates arranged in multiple stages on a rotation shaft. And the fixed-side heat transfer plate is a plurality of fixed-side heat transfer plates facing the plurality of rotation-side disc-shaped heat transfer plates.
[5] In the non-contact part cooling apparatus by radiation of the power storage flywheel as described in [4] above, the surfaces of the plurality of rotating side disk-shaped heat transfer plates, the plurality of fixed side heat transfer plates, and the fixed side heat transfer It is characterized in that the inner surface of the thermal chamber is matte and painted black.

  According to the present invention, in a flywheel for power storage, heat transfer energy can be secured and the superconductor can be cooled without increasing energy loss due to windage, and by using radiant heat transfer, a lean gas can be obtained. It is possible to reduce labor related to pressure adjustment at the time of introduction.

1 is an overall configuration diagram of a power storage flywheel according to the present invention. It is a block diagram of the cryostat of the flywheel for electric power storage which concerns on this invention. It is a figure which shows the non-contact part cooling device by radiation of the flywheel for electric power storage which shows 1st Example of this invention. It is a figure which shows the non-contact part cooling device by radiation of the flywheel for electric power storage which shows 2nd Example of this invention. It is a top view which shows the state which opened the stationary-side heat-transfer chamber and stationary-side heat-transfer plate of the non-contact part cooling device by radiation of the electric power storage flywheel which shows 2nd Example of this invention. It is a schematic diagram of the conventional flywheel for superconducting power storage.

  The non-contact part cooling device by radiation of the power storage flywheel according to the present invention includes a rotation side heat transfer plate attached to a rotation shaft of the power storage flywheel, and a fixed side heat transfer plate facing the rotation side heat transfer plate. And the heat transfer area by radiation between the rotation side heat transfer plate and the fixed side heat transfer plate is increased.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an overall configuration diagram of a power storage flywheel according to the present invention, and FIG. 2 is a configuration diagram of a cryostat of the power storage flywheel.
In these drawings, 1 is an electric motor / generator, 2 is a non-contact magnetic force torque transmission component, 2A is a surface plate of the non-contact magnetic force torque transmission component, 3 is a vacuum vessel, 4 is a vacuum chamber (insulation bath), 5 Is a shield container, 5A is a lid of the radiation shield tank, 5B is an anchor for temperature fixing point, 6 is a radiation shield tank (intermediate temperature tank), 7 is an inner tank container, 8 is an inner tank (cryogenic bath), and 8A is an inner The central part of the tank, 8B is the room temperature part of the inner tank, 8C is the temperature gradient conduit part, 9 is the upper magnetic support device (high temperature superconducting magnetic bearing), 10 is the flywheel, 11 is the rotating shaft, 12 is the lower magnetic support device (high temperature superconductivity) (Magnetic bearing), 13 is a high-temperature superconducting power lead, 14 is a cryogenic refrigerator, 16 is an inner tank vacuum ventilation / gas replacement device, 17 is a baffle plate, and 21 and 41 are non-contact part cooling devices by radiation according to the present invention. It is.

FIG. 3 is a view showing a non-contact part cooling device by radiation of a power storage flywheel according to the first embodiment of the present invention, and FIG. 3 (a) is a perspective view showing the non-contact part cooling device before setting. FIG. 3B is a perspective view showing the non-contact portion cooling device after being set.
As shown in FIGS. 3 (a) and 3 (b), the non-contact part cooling device 21 includes a rotation side heat transfer plate (cooled side) 22 and a fixed side heat transfer plate (cooling side) facing the rotation side heat transfer plate (cooled side). 28. The fixed-side heat transfer plate 28 includes a first fixed-side cylindrical heat transfer plate 29, a second fixed-side cylindrical heat transfer plate 30, and a third fixed-side cylindrical heat transfer plate 31 that are concentric. The inner tank 32 and the outer tank 33 are arrange | positioned on the outer side. The rotation-side heat transfer plate 22 includes a rotation lid 23, a first rotation-side cylindrical heat transfer plate 25 formed around the rotation shaft 24 below the rotation lid 23, and a second rotation-side cylinder. The heat transfer plate 26 and the third rotation side cylindrical heat transfer plate 27 are arranged concentrically.

  Since heat transfer by radiation is proportional to the heat transfer area, as shown in FIG. 3, a plurality of fixed side cylindrical heat transfer plates with respect to a plurality of rotation side cylindrical heat transfer plates (cooled side) 25-27. (Cooling side) 29 to 31 are alternately laminated in a non-contact manner to expand the heat transfer area from the rotation side heat transfer plate (cooled side) 22 to the fixed side heat transfer plate (cooling side) 28. And the amount of heat transfer can be greatly increased. Further, the rotating side cylindrical heat transfer plates 25 to 27 and the fixed side cylindrical heat transfer plates 29 to 31 are matted and painted black, thereby improving the radiation rate and further increasing the heat transfer amount.

FIG. 4 is a view showing a non-contact part cooling device by radiation of a power storage flywheel according to a second embodiment of the present invention, and FIG. 4 (a) is a perspective view showing the non-contact part cooling device before setting. 4 (b) is a view showing the non-contact portion cooling device after being set, and FIG. 5 is a plan view showing a state where the fixed-side heat transfer chamber and the fixed-side heat transfer plate of the non-contact portion cooling device are opened. is there.
As shown in FIGS. 4 (a) and 4 (b), the non-contact part cooling device 41 includes a multi-stage fixed-side heat transfer plate (cooling side) 49 to 52, and a fixed-side transfer composed of these. It consists of a thermal chamber 48. That is, the fixed side heat transfer chamber 48 includes the first fixed side heat transfer plate 49, the second fixed side heat transfer plate 50, the third fixed side heat transfer plate 51, and the fourth fixed side heat transfer plate 52. The outer tub 53 is arranged on the outer side. A plurality of rotation-side heat transfer plates (cooled side) 42 are accommodated in a fixed-side heat transfer chamber 48 composed of the first to fourth fixed-side heat transfer plates (cooling side) 49 to 52. The rotation-side heat transfer plate 42 includes a rotation shaft 43, a first rotation-side disc-shaped heat transfer plate 44 formed around the rotation shaft 43, and a second rotation-side disc-shaped heat transfer plate. 45, a third rotating disk-shaped heat transfer plate 46, and a fourth rotating disk-shaped heat transfer plate 47.

  When the rotation-side heat transfer plate 42 is disposed in the fixed-side heat transfer chamber 48, the first to fourth fixed-side heat transfer plates 49 to 52 are preliminarily centered on the pivot portion 54 as shown in FIG. Open With respect to the first to fourth fixed-side heat transfer plates 49 to 52 in this state, the first to fourth rotation-side disk-shaped heat transfer plates 44 to 47 arranged in a step shape on the rotation shaft 43 are alternately arranged. The first to fourth fixed-side heat transfer plates 49 to 52 are set by the retaining member 55 and then placed in the outer tub 53 as shown in FIG.

  As described above, the rotation-side heat transfer plates (covers) are formed by alternately stacking the rotation-stage disk-shaped heat transfer plates 44 to 47 between the plurality of stages of the fixed-side heat transfer plates 49 to 52 in a non-contact manner. The heat transfer area from the (cooling side) 42 to the fixed side heat transfer chamber (cooling side) 48 can be expanded, and the amount of heat transfer can be greatly increased. Furthermore, the surface of these rotary side disk-shaped heat transfer plates 44 to 47 and the corresponding fixed side heat transfer plates 49 to 52 is matted and painted black, thereby improving the radiation rate and further increasing the amount of heat transfer. Can be made.

Thus, by installing the non-contact part cooling device by radiation of the present invention in the space of the middle part of the conventional power storage flywheel or the space formed by extending the upper and lower ends of the power storage flywheel, The heat generated in the superconducting bulk body can be effectively cooled.
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 non-contact part cooling device by radiation of the power storage flywheel of the present invention can be used as a non-contact part cooling device that can improve the efficiency of the flywheel system.

DESCRIPTION OF SYMBOLS 1 Electric motor / generator 2 Non-contact magnetic force torque transmission component 3 Vacuum container 4 Vacuum tank (heat insulation tank)
5 Shield container 5A Radiation shield tank cover 5B Anchor for temperature fixed point 6 Radiation shield tank (intermediate temperature tank)
7 Inner tank container 8 Inner tank (cryogenic bath)
8A Inner tank center 8B Inner tank (Cryogenic tank)
8C Temperature gradient conduit 9 Upper magnetic support device (high temperature superconducting magnetic bearing)
10 Flywheel 11 Rotating shaft 12 Lower magnetic support device (high temperature superconducting magnetic bearing)
13 High temperature superconducting power lead 14 Cryogenic refrigerator 21, 41 Non-contact part cooling device by radiation 22 Rotating side heat transfer plate (cooled side)
23 Rotating lid 24, 43 Rotating shaft 25 First rotating side cylindrical heat transfer plate 26 Second rotating side cylindrical heat transfer plate 27 Third rotating side cylindrical heat transfer plate 28 Fixed side heat transfer plate (cooling side) )
29 1st fixed side cylindrical heat transfer plate 30 2nd fixed side cylindrical heat transfer plate 31 3rd fixed side cylindrical heat transfer plate 32 Inner tank 33, 53 Outer tank 42 Multiple stages of rotation side heat transfer plates (Cooled side)
44 1st rotation side disk-shaped heat transfer plate 45 2nd rotation side disk-shaped heat transfer plate 46 3rd rotation side disk-shaped heat transfer plate 47 4th rotation side disk-shaped heat transfer plate 48 fixed Side heat transfer chamber (cooling side)
49 1st fixed side heat transfer plate 50 2nd fixed side heat transfer plate 51 3rd fixed side heat transfer plate 52 4th fixed side heat transfer plate 54 Pivoting part 55 Fastening member

Claims (5)

(A) a rotating side heat transfer plate attached to the rotating shaft of the power storage flywheel;
(B) comprising a stationary heat transfer plate facing the rotating heat transfer plate,
(C) A non-contact part cooling device by radiation of a power storage flywheel, wherein a heat transfer area by radiation between the rotating side heat transfer plate and the fixed side heat transfer plate is increased.   The non-contact part cooling apparatus by radiation of the flywheel for power storage according to claim 1, wherein the rotation side heat transfer plate is a plurality of rotation side cylindrical heat transfer plates fixed to a rotation lid, and the fixed side heat transfer A non-contact part cooling device by radiation of a power storage flywheel, wherein the plate is a plurality of fixed-side cylindrical heat transfer plates arranged opposite to the plurality of rotation-side cylindrical heat transfer plates.   The non-contact part cooling apparatus by radiation of the flywheel for power storage according to claim 2, wherein the plurality of rotating side cylindrical heat transfer plates and the plurality of fixed side cylindrical heat transfer plates are matted and painted black. The non-contact part cooling device by the radiation of the flywheel for power storage characterized.   The non-contact part cooling apparatus by radiation of the flywheel for power storage according to claim 1, wherein the rotation side heat transfer plates are a plurality of rotation side disk-shaped heat transfer plates arranged in multiple stages on a rotation shaft, and the fixed The non-contact portion cooling apparatus by radiation of a power storage flywheel, wherein the side heat transfer plate is a plurality of fixed side heat transfer plates facing the plurality of rotating disk-shaped heat transfer plates.   The non-contact part cooling device by radiation of the flywheel for power storage according to claim 4, wherein the plurality of rotating side disk-shaped heat transfer plates, the surfaces of the plurality of fixed side heat transfer plates, and the inside of the fixed side heat transfer chamber Non-contact part cooling device by radiation of power storage flywheel, characterized in that the surface is matte and painted black.