JP3477524B2 - Rotation loss measurement method for superconducting bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Electric power converted to kinetic energy of flywheel and stored
Rotation loss measurement of superconducting bearing part provided in storage device
MethodAbout. [0002] BACKGROUND OF THE INVENTION Electricity storage
As a device, the present applicant firstly describes a rotating body and a rotating body.
A flywheel provided on a fixed basis and a rotating body
Placed around the rotor and fixed part
Drive motor consisting of a fixed stator and a rotating body
An annular permanent magnet portion provided concentrically and fixedly;
An annular superconductor section arranged to face the permanent magnet section
A power storage device with a superconducting bearing
(See JP-A-4-370417). In such a power storage device, when a power failure occurs,
Kinetic energy stored in the flywheel
In order to remove the superconducting bearing efficiently,
It is necessary to reduce rolling loss. [0004] However, a rotation loss measuring device for a superconducting bearing portion is used.
At present, there is no device. Therefore, fly ho
Kinetic energy stored in eel as electrical energy
Annular permanent magnets in superconducting bearings for efficient extraction
To determine the optimal specifications for the stone and annular superconductor
Drive the actual power storage device and stop the motor
The kinetic energy stored in the flywheel is converted to electric energy
The work to be taken out as a hook
Various specifications of magnet and annular superconductor are changed
There is a need. As a result, the problem of troublesome work
is there. [0005] An object of the present invention is to solve the above-mentioned problem.
Rotation loss measurement of conductive bearingsMethodIs to provide. [0006] SUMMARY OF THE INVENTION A superconducting shaft according to the present invention
Rotation loss measurement of receiving partMethodIs concentric with the rotating body
Facing the annular permanent magnet and permanent magnet attached to
The ring superconductor attached to the fixed part
A superconducting bearing part, which is axially separated from the superconducting bearing part and
Rotation provided at two different height positions
Controls the position of the body in two orthogonal radial directions
Radial magnetic bearing part and rotating body against the fixed part
A magnet for floating in a non-contact state and a rotor provided on the rotating body
And fixed around the rotor
Drive motor consisting of a stator and rotating body
And a rotation speed sensor that detects the speed.Equipment
Method for measuring the rotational loss of the superconducting bearing.
And the magnet rotates the rotating body in a non-contact state to the fixed part.
After rotating, the rotating body is fixed by the radial magnetic bearing.
Determine the relative position in the radial direction with respect to the fixed part,
Activate the rotary drive motor to rotate the rotating body at a predetermined speed.
After rotating, stop the motor and rotate the rotating body freely.
The change in rotation speed at this time is detected by a rotation speed sensor.
Calculating a first rotational loss using the data;
On the other hand, the rotating body is kept in non-contact with the fixed part by the magnet.
After floating, the rotating body is
Determine the relative position in the radial direction with respect to the
To cool the superconductor in the annular superconductor part of the superconducting bearing
While maintaining the superconducting state, the rotary drive motor is activated.
After rotating the rotating body at the same speed as above,
Is stopped and the rotating body rotates freely, and the rotation speed at this time
Degree change is detected by the rotation speed sensor, and the data is used
Determining a second rotation loss, and a second rotation loss
Superconducting bearing part by reducing the first rotational loss from
Characterized by the rotation loss ofThings. [0007] [Function] It is configured as described above.Rotation loss measurement method
According to the above, the rotational loss of the superconducting bearing was measured as follows.
Is determined. That is, the rotating body is fixed to the fixed part by the magnet.
After floating in a non-contact state, the radial magnetic bearing
Position relative to the fixed part of the rotating body in the radial direction
Position, and then activate the rotary drive motor to
Is rotated at a predetermined rotation speed. Then the motor was stopped
And rotate the rotating body freely.
Detected by the rotation speed sensor, and the first
Find the rolling loss. On the other hand, a rotating body is fixed to a fixed portion by a magnet.
After floating in a non-contact state, the bearing
Radial position relative to fixed part of rotating body
And then superconductivity of the annular superconductor part of the superconducting bearing part
The body is cooled and kept in a superconducting state.
Activate the motive to rotate the rotating body at the same speed as above.
You. After that, stop the motor and rotate the rotating body freely.
The change in rotation speed at this time is detected by a rotation speed sensor.
Then, a second rotation loss is obtained using the data. Then, the second rotation loss is converted to the first rotation loss.
By reducing the loss, the rotational loss of the superconducting bearing
Can be [0010] Embodiments of the present invention will be described below with reference to the drawings.
explain. FIG. 1 shows the present invention.Used in the method ofSuperconductivity
1 schematically shows the entire configuration of a rotation loss measuring device for a bearing unit. In FIG. 1, the rotation loss of the superconducting bearing is measured.
The setting device consists of a vertical shaft-shaped rotating body (1) and a
Conductive bearing (2) and axial superconducting bearing (3)
And the two superconducting bearings (2) and (3)
Rotating body provided at two different height positions
Controls two radial positions orthogonal to each other in (1)
The radial magnetic bearings (4) and (5) and the rotating body (1)
Permanent magnet that floats in a non-contact state with a fixed part not shown
Between stone (6) (7) and two radial magnetic bearings (4) (5)
Rotor (8) and fixed part provided on the rotating body (1)
And a stator arranged around the rotor (8)
(9) Rotary drive motor (10) and rotating body (1)
A rotation speed sensor (11) for detecting a rotation speed. The upper and lower portions of the rotating body (1) are fixed to the rotating body (not shown).
Touch-down bearings (12) and (13) are located between
Have been. Lower than the lower touchdown bearing (13)
At the height position, a horizontal annular plate (14) around the rotating body (1)
Are provided in a fixed manner. Then, the rotation speed sensor (1
1) is to detect the rotation speed of the horizontal annular plate (14).
It is arranged below the annular plate (14). For mounting a permanent magnet on the upper end of the rotating body (1)
The horizontal disk (15) is detachably fixed. Horizontal disk
A rising wall (16) is formed integrally with the periphery of (15).
On the inner surface of the rising wall (16) of the horizontal disk (15), the rotating body (1)
The first annular permanent magnet (17) is detachably mounted concentrically with
Have been killed. The annular permanent magnet part (17) is made of, for example, copper.
And is detachably fixed to the inner peripheral surface of the rising wall (16).
A vertical cylindrical body (18). Of vertical cylindrical body (18)
The lower end is integrally formed with an inward flange (19).
Inside the vertical cylinder (18), on the inward flange (19)
A plurality of annular permanent magnets (20) are raised via an annular spacer (21).
Arranged downward and fixed to vertical cylindrical body (18)
Have been. The lower surface of the horizontal disk (15) is concentric with the rotating body (1).
The second annular permanent magnet portion (22) is detachably mounted
ing. The annular permanent magnet part (22) is made of, for example, copper.
Horizontal ring detachably fixed to the lower surface of the horizontal disk (15)
The lower surface of the horizontal annular plate (23) having the
A plurality of annular grooves (24) are formed concentrically with the rolling element (1).
In each of these grooves (24), an annular permanent magnet (25) is provided.
Fitted and fixed. A first annular superconductor is attached to a fixing portion (not shown).
The part (26) is detachable so that it is concentric with the rotating body (1).
Installed. The first annular superconductor portion (26) has an annular shape.
Of the horizontal part (27) and the inner peripheral edge of the horizontal part (27).
A vertical portion that extends and faces the first annular permanent magnet portion (17)
(28). Of the toroid (29)
An annular hollow portion (30) is formed in the vertical portion (28), in which the vertical hollow portion is formed.
A cylindrical type 2 superconductor (31) is arranged. Ring (2
9), the cooling flow is connected so as to communicate with the hollow part (30) inside.
The body supply pipe (32) and the discharge pipe (33) are connected. cold
The cooling fluid supply pipe (32) and the discharge pipe (33)
It is connected to a cooling device or the like via a temperature control unit.
Then, the cooling fluid supply pipe (32) and the hollow portion (3
0) and the cooling fluid discharge pipe (33), for example, liquid nitrogen
Cooling fluid consisting of element is circulated, filling the hollow part (30).
The superconductor (31) is cooled by the applied cooling fluid. Further, below the second annular permanent magnet portion (22),
In addition, a second annular superconductor portion (3
4) is detachably mounted so that it is concentric with the rotating body (1).
Have been killed. The second annular superconductor portion (34) has a horizontal annular shape.
It has a body (35). Annular hollow part (36) in horizontal annular body (35)
Is formed, and a horizontal annular type 2 superconductor (37) is formed therein.
Are located. Annular body (35), internal hollow part (36)
The cooling fluid supply pipe (38) and the discharge pipe so as to communicate with the
(39) is connected. Cooling fluid supply pipe (38) and drain
The outlet pipe (39) is cooled via a temperature control unit (not shown).
It is connected to devices and the like. And cooled by the cooling device
Fluid supply pipe (38), hollow part (36) and cooling fluid discharge pipe (39)
Circulates a cooling fluid, for example, consisting of liquid nitrogen.
Is superposed by the cooling fluid filled in the hollow part (36).
The conductor (37) is cooled. Then, the first annular permanent magnet portion (17) and the first
Radial superconducting bearing with the annular superconductor part (26)
A second annular permanent magnet section (22) and a second annular permanent magnet section (22).
Axial superconducting bearing with annular superconductor section (34)
The unit (3) is configured. The two radiuses of the rotating body (1) which are orthogonal to each other
If the axes extending in the direction of the axis are the X axis and the Y axis,
The radial magnetic bearings (4) and (5) are
A magnetic bearing (A) and a control-type magnetic bearing in the Y-axis (B)
Consisting of The magnetic bearings (A) and (B) of both magnetic bearings (4) and (5)
Aspirate the rotating body (1) from both sides on the X and Y axes respectively
(A1) (A2) (A3) (A4) (B
1) (B2), (B3) and (B4) are provided. Electromagnet (A1)-(A4) (B1)-
In the vicinity of (B4), one radial displacement sensor
(X1) (X2) (X3) (X4) (Y1) (Y2) (Y3) (Y4)
You. In each magnetic bearing (A) (B), two displacement sensors (X1) (X
2) (X3) (X4) sandwiches the rotating body (1) from both sides in the X-axis direction,
The displacement of the rotating body (1) in this portion in the X-axis direction is detected. Remaining
The two displacement sensors (Y1) (Y2) (Y3) (Y4) are the rotating body (1)
Are sandwiched from both sides in the Y-axis direction, and the Y
Detects axial displacement. Below the rotating body (1), an elevating body (4)
0) is provided. The lower surface of the rotating body (1) and the lifting body (4
The permanent magnets (6) and (7) are
You. The lower end of the permanent magnet (6) attached to the rotating body (1),
Same as the upper end of the permanent magnet (7) attached to the lifting body (40)
Polarized magnetism. Then, lift the lifting body (40)
The magnetic repulsion of the two permanent magnets (6) and (7)
The rotating body (1) floats with respect to the fixed part
Swelling. Next, the rotational loss of the superconducting bearing is measured.
The method will be described. First, the lifting body (40) is raised.
And two permanent magnets (6), a rotating body (1) and a lifting body (40)
The rotating body (1) is moved against the fixed part by the magnetic repulsion of (7).
Two radial magnetic axes after levitating in a non-contact state
Radial to fixed part of rotating body (1) by receiving parts (4) (5)
Determine the relative position of the directions. Next, the electric motor for rotary drive
Activate (10) to rotate the rotating body (1) at the specified speed.
You. After that, stop the motor (10) and free the rotating body (1).
Rotate and change the rotation speed at this time.
1) and use the data to determine the first rotational loss
You. In the same manner as described above, the rotating body (1) is fixed.
After floating in a non-contact state against the fixed part, two radius
The magnetic bearings (4) and (5) of the rotating
The relative position in the radial direction. Then, Raji
The first annular superconductor part (26) of the Al-direction superconducting bearing part (2)
And the second annular superconducting part of the axial superconducting bearing part (3)
Hollow part (30) (36) of annular body (29) (35) in conductor part (34)
A cooling fluid is circulated inside each
(31) (37) is cooled to the type 2 superconducting state, and in this state
Hold. Furthermore, the rotation drive motor (10) is operated.
The rotating body (1) is rotated at the same speed as above. afterwards,
Stop the motor (10) and rotate the rotating body (1) freely.
The rotation speed change at the time of is detected by the rotation speed sensor (11),
A second rotation loss is obtained using the data. Then, from the second rotation loss to the first rotation loss,
Loss of superconducting bearings (2) and (3)
Is required. In the above embodiment, the radial superconductivity
In the first annular permanent magnet part (17) of the body bearing part (2), a horizontal disk
Vertical cylindrical shape fixed to the inner peripheral surface of the rising wall (16) of (15)
An annular permanent magnet (20) is arranged on the inner peripheral surface of the body (18).
In measuring rotation loss, the motor (10)
Even when (1) is rotated at high speed, the permanent magnet
(20) is prevented from being destroyed. Radial superconductivity
The bearing (2) is mounted on the rising wall (16) of the horizontal disk (15)
The first annular permanent magnet portion and the second annular permanent magnet portion
A first annular permanent magnet portion,
Outside the vertical cylindrical body fixed to the outer peripheral surface of the rising wall (16)
With an annular permanent magnet arranged on the peripheral surface, rotation loss
If the rotating body (1) is rotated at high speed when measuring loss, centrifugal force
Can destroy permanent magnets,
Or come off. In the above embodiment, the elevating body (40) is also
A permanent magnet (7) is attached.
May be attached. FIG. 2 shows the rotation loss measurement of the present invention.MethodBy
Power Storage Using Superconducting Bearings with Measured Rotational Loss
The device is shown. In FIG. 2, the power storage device is not shown.
Vertical rotating body (50) placed in a vacuum chamber
And a non-fixedly provided intermediate portion at the height of the rotating body (50).
Flywheel (51) made of magnetic material, fixed not shown
The first and the first provided between the section and the flywheel (51)
A second two superconducting bearings (52) (53) and a flywheel
A rotating body (50) provided above and below (51), respectively.
The position of two radial directions perpendicular to each other
High-speed radial bearings (54) and (55) and rotating body (50)
Rotary drive motor such as high frequency motor to rotate (56)
And radial to the fixed part of the rotating body (50) at the start of operation
Initial positioning to determine the direction and axial position
Between the upper and lower ends of the rotating mechanism (50) and the fixed part.
Touch-down bearings (58) and (59)
I have. The flywheel (51) is provided with a horizontal disc-shaped portion (60).
And formed integrally with the rotating body (50) concentrically around its periphery
It consists of a cylindrical rising part (61),
A first annular permanent magnet (6) is formed concentrically with the rotating body (50) on the inner peripheral surface.
2) is provided. The first annular permanent magnet portion (62)
On the inner peripheral surface of the rising portion (61) of the wheel (51)
A plurality of annular grooves (63) are formed at intervals, and each annular groove (63) is formed.
The annular permanent magnet (64) is fitted and fixed in the groove (63).
Are formed. The horizontal disc-shaped portion (60) of the flywheel (51)
On the lower surface, the second annular permanent magnet portion (6) is concentric with the rotating body (50).
5) is provided. The second annular permanent magnet part (65)
Rotating body (50) on the lower surface of the horizontal disk-shaped part (60) of the wheel (51)
A plurality of annular grooves (66) are formed concentrically with the respective annular grooves.
An annular permanent magnet (67) is fitted and fixed in (66).
Is formed. First and second annular permanent magnet portions
The annular permanent magnets of (62) and (65) respectively rotate the rotating body (50).
To prevent the magnetic flux distribution around the axis from changing due to rotation
Is provided. A first annular superconductor is attached to a fixing portion (not shown).
The part (68) is provided so as to be concentric with the rotating body (50).
I have. The first annular superconductor portion (68) includes an annular horizontal portion (69).
And extend downward along with the inner peripheral edge of the horizontal portion (69), and
A vertical portion (70) opposed to the one annular permanent magnet portion (62);
And an annular body (71). At the vertical part (70) of the annular body (71)
An annular hollow portion (72) is formed, in which a vertical cylindrical second type is formed.
A superconductor (73) is arranged. Ring (71), of which
Cooling fluid supply pipe (74) so as to communicate with the hollow part (72)
And the discharge pipe (75) are connected. Cooling fluid supply pipe
(74) and the discharge pipe (75) are connected to a temperature control unit (not shown).
Connected to a cooling device or the like via a port. And cooling
Cooling fluid supply pipe (74), hollow part (72) and cooling
Via the fluid discharge pipe (75), for example,
Cooling fluid is circulated and filled in the hollow part (72)
The superconductor (73) is cooled by the fluid. Further, below the second annular permanent magnet portion (65),
In addition, a second annular superconductor portion (7
6) is provided so as to be concentric with the rotating body (50).
You. The second annular superconductor section (76) has a horizontal annular body (77).
I have. An annular hollow part (78) is formed in the horizontal annular body (77).
A horizontal annular type 2 superconductor (79) is placed in this
ing. The annular body (77) communicates with the hollow part (78) inside
The cooling fluid supply pipe (80) and the discharge pipe (81)
Has been continued. Cooling fluid supply pipe (80) and discharge pipe (81)
Is connected to a cooling device via a temperature control unit (not shown).
It is connected. Then, the cooling fluid is supplied by the cooling device.
Via pipe (80), hollow (78) and cooling fluid discharge pipe (81)
The cooling fluid, for example, composed of liquid nitrogen
The superconductor by the cooling fluid filled in the hollow part (78).
(79) is cooled. The first and second annular superconductor portions (68) and (76)
Type 2 superconductors (73) and (79) are made of yttrium-based
Conductor, eg YBa_TwoCu_ThreeO_7-xConsisting of bulk
Of normal conducting particles (Y_TwoBa₁Cu₁) Uniformly mixed
Environment in which a type 2 superconducting state appears
Under the magnetic flux from the permanent magnets (64, 67)
Has the property of restricting And both superconductivity
In the bodies (73) and (79), the magnetic flux of the permanent magnets (64) and (67) is
At a distance where the rotor (50) rotates.
Is located at a position where the distribution of the penetrating magnetic flux does not change.
You. Then, the first annular permanent magnet portion (62) and the first
The first superconducting bearing portion (52) by the annular superconducting portion (68)
And a second annular permanent magnet portion (65) and a second annular super magnet.
The second superconducting bearing portion (53) is constituted by the conductor portion (76).
Have been. Two radials orthogonal to each other of the rotating body (50)
If the axes extending in the direction of the axis are the X axis and the Y axis,
The radial magnetic bearings (54) and (55) are
Control type magnetic bearing (A) and Y axis direction control type magnetic bearing (B)
And Magnetic bearings (A) (B) of both magnetic bearings (54) (55)
Indicates that the rotating body (50) is on both sides on the X axis and the Y axis, respectively.
(A1) (A2) (A3)
(A4), (B1), (B2), (B3) and (B4). Electromagnet (A1)-(A4)
In the vicinity of (B1) to (B4), one radial direction change
Position sensors (X1) (X2) (X3) (X4) (Y1) (Y2) (Y3) (Y4)
ing. In each magnetic bearing (A) (B), two displacement sensors (X
1) (X2) (X3) (X4) sandwich the rotating body (50) from both sides in the X-axis direction.
The displacement of the rotating body (50) in this part in the X-axis direction is detected.
You. The remaining two displacement sensors (Y1) (Y2) (Y3) (Y4)
The body (50) is sandwiched from both sides in the Y-axis direction, and the rotating body (5
The displacement in the Y-axis direction 0) is detected. The rotary drive motor (56) is a flywheel.
In the part surrounded by the rising part (61) of (51), the rotating body (5
0) and the rotor (84)
A stator (85) arranged around the motor (84). The initial positioning mechanism (57) is configured as follows.
Have been. That is, the rotation body (50)
A tapered hole (not shown) narrowed toward
I have. An elevating body (82) is provided below the rotating body (50).
And is directed downward at the center of the upper end surface of the lifting body (82).
A narrowed tapered hole (not shown) is formed.
In the tapered hole of the elevating body (82), insert a vertical
A ball (83) having a diameter is arranged. And going up and down
Body (82), and a tapered hole of the rotating body (50) and the elevating body (82),
The ball (83) constitutes the initial positioning mechanism (57)
I have. In such a configuration, the power in the stopped state
The storage device is put into operation as follows. First, the vacuum chamber was evacuated.
Then, the lifting body (82) of the initial positioning mechanism (57) is raised.
Axial and radial directions of the rotating body (50)
Direction positioning. The magnetic bearings (54) and (55)
Even in this case, the rotary body (50) is positioned in the radial direction.
Once the rotating body (50) is positioned in this way, the cooling device
The cooling fluid is circulated through each hollow part (72) (78)
Cool the superconductors (73) and (79) and maintain them in the second class superconducting state
You. Then, the permanent magnets (64) (6) of each superconducting bearing (52) (53)
Most of the magnetic flux emitted from (7) is inside the superconductors (73) (79)
And is constrained (pinning phenomenon).
Here, each superconductor (73) (79) has normal conductor particles inside.
Into the superconductors (73) and (79) because
The distribution of the invading magnetic flux is constant, so that
Permanent magnets (64) and (67) penetrate the pins erected on conductors (73) and (79).
The superconductors (73) and (79) have permanent magnets
The rotating body (50) is restrained together with (64) and (67). Accordingly
The rotating body (50) floats in a very stable
Will be supported in the axial and radial directions.
You. At this time, the magnetic flux that has entered the superconductors (73) (79)
As long as the flux distribution is uniform and invariant with respect to the rotation axis,
It does not become a resistance to hinder. The superconductors (73) (79) are cooled
In the second superconducting state, a supporting force is generated,
Lower the elevating body (82) of the initial positioning mechanism (57), and
Eliminate support by Support by initial positioning mechanism (57)
When there is no more, the rotating body (50) descends slightly due to its own weight,
The magnetic force of the superconducting bearings (52) (53),
Stop at a position that balances the pinning force. And rotation
The body (50) is rotated at high speed by the motor (56),
Is converted to kinetic energy of the flywheel (51) and stored
Is done. In the above power storage device, the first superconductor
In the first annular permanent magnet portion (62) of the bearing portion (52), a flywheel is provided.
Annular permanent magnet (64) on the inner peripheral surface of the rising portion (61) of the
Are arranged, so that the rotating body (50) is
Even when rotating at high speed, the permanent magnet (64)
It is prevented from being destroyed. Also, outside the rising part (61)
The peripheral surface is reinforced with CFRP (composite fiber reinforced plastic) etc.
It is more effective if done. First superconducting bearing
Is installed on the outer peripheral surface of the rising portion (61) of the flywheel (51).
The first annular permanent magnet portion which is
A first annular permanent magnet portion comprising a first annular superconductor portion;
Has an annular permanent magnet fixed to the rising part
When the rotating body (50) is rotated at high speed during power storage,
The ring-shaped permanent magnet may be destroyed by the
Or deviate from 1). FIG. 3 to FIG. 9 show super electric power in a power storage device.
7 shows a modification of the guide bearing portion. In the following description, FIG.
The same components and parts as those shown
A duplicate description will be omitted. 3 to 9.
Is a rotating body, flywheel, permanent magnet and superconductor
Only the schematic is shown. In FIG. 3, the horizontal direction of the flywheel (51)
Below the disk-shaped part (60), the fixed part
A permanent magnet (90) is arranged. Flywheel (51) water
Below each annular permanent magnet (67) mounted on the flat disk (60)
The ends are magnetized with the same polarity and are horizontally annular.
The upper end of the permanent magnet (90) is the same as the lower end of the annular permanent magnet (67).
It has unipolar magnetism. Therefore, the rotating body (50)
Is also caused by the magnetic repulsion between the permanent magnets (90) and (67).
Supported in the axial direction. In FIG. 4, the horizontal direction of the flywheel (51)
On the upper surface of the disk-shaped portion (60), a plurality of rings are concentrically arranged with the rotating body (50).
An annular groove (91) is formed, and an annular permanent magnet is formed in each annular groove (91).
A stone (92) is fitted and fixed to form a ring-shaped permanent magnet.
A part (93) is formed. Also, the flywheel (51)
Rotate to the fixed part in the part surrounded by the rising part (61)
An annular superconductor portion (94) is provided concentrically with the body (50).
You. The superconductor portion (94) is made of meat concentric with the rotating body (50).
A thick second cylindrical superconductor (95) is provided. So
Then, the outer peripheral surface of the superconductor portion (94) and the
The first superconducting bearing portion (96) is formed by the magnet portion (62).
The permanent magnet between the lower surface of the superconductor part (94) and the horizontal disc-shaped part (60)
The stone portion (93) forms the second superconducting bearing portion (97).
I have. That is, the superconductor (95) is composed of two superconducting bearings.
(96) Also serves as the superconductor of (97). In FIG. 5, the flywheel (100) is
The flat disk-shaped part (101) and its periphery are integrally formed and rotated
It consists of a hanging part (102) concentric with the body (50). Hula
On the upper surface of the horizontal disk-shaped part (101) of the wheel (100).
A plurality of annular grooves (103) are formed concentrically with the body (50).
An annular permanent magnet (104) is fitted into the annular groove (103) and fixed.
The first permanent magnet part (111) is formed by the
ing. Also, a vertical space is provided on the inner peripheral surface of the hanging part (102).
A plurality of annular grooves (105) are formed at
An annular permanent magnet (106) is fitted and fixed in (105)
Thereby, the second permanent magnet portion (112) is formed.
Above the horizontal disk (101) of the flywheel (100)
And an annular superconductor section (107) is provided in the fixed section.
You. The annular superconductor part (107) is a horizontal annular second-class superconductor
(108). Also, the flywheel (100)
In the part surrounded by the lower part (102), the rotating body (5
An annular superconductor portion (109) is provided concentrically with (0).
The superconductor part (109) is a cylinder concentric with the rotating body (50).
A second type superconductor (110). And the first
The first magnet part (111) and the annular superconductor part (107)
A superconducting bearing part (113) is formed, and a second permanent magnet part (112) is formed.
And a second superconducting bearing (1)
14) is configured. In FIG. 5, the flywheel (10
Above the horizontal disk-shaped part (101)
Replaces the superconductor section (107) with the superconductor (108).
A horizontal annular permanent magnet may be arranged. This place
To the flywheel (100) on the horizontal disc (101)
The upper end of each of the annular permanent magnets (104)
The lower end of a horizontal annular permanent magnet
The magnetic part has a different polarity from the upper end of the annular permanent magnet (104).
Shall be taken. Therefore, the rotating body (50) is
Magnets (104)
It is supported in the direction. In FIG. 6, the water of the flywheel (100)
On the lower surface of the flat disk-shaped part (101), a plurality of concentric
Annular grooves (115) are formed, and a ring is formed in each annular groove (115).
The permanent magnet (116) is fitted and fixed
A permanent magnet portion (117) is formed. Also flywheel
In the area surrounded by the hanging part (102) of the
An annular superconductor (118) is provided concentrically with the rotating body (50).
Have been. Superconductor (118) is concentric with rotating body (50)
A large-sized cylindrical second-class superconductor (119)
I have. Then, the upper surface of the superconductor section (118) and the horizontal disk
The first superconducting shaft is formed by the permanent magnet portion (117) of the shape portion (101).
A receiving portion (120) is formed, and is perpendicular to the outer peripheral surface of the superconductor portion (118).
The second superconducting shaft is formed by the permanent magnet portion (112) of the lower portion (102).
A receiving portion (121) is formed. That is, the superconductor (11
9) serves as the superconductor for the two superconducting bearings (120) and (121).
I'm sleeping. In FIG. 7, the flywheel (125)
The horizontal disk part (126) and the center part of the height are horizontal disk parts (1
26) and formed concentrically with the rotating body (50)
And a cylindrical portion (127). Flywheel (12
5) Concentric with the rotating body (50) on the upper surface of the horizontal disk-shaped part (126)
A plurality of annular grooves (128) are formed in a
8) Make sure that the ring-shaped permanent magnet (129) is
Thus, a permanent magnet portion (130) is formed. Also the yen
On the inner peripheral surface of the upper half and lower half of the cylindrical part (127),
A plurality of annular grooves (131) and (132) are
The annular permanent magnet (13) is formed in each annular groove (131) (132).
3) The permanent magnet part is
(135) and (136) are formed. Lower half of cylindrical part (127)
In the part surrounded by, the fixed part is concentric with the rotating body (50)
An annular superconductor portion (137) is provided at the bottom. Superconductor section
(137) is a cylindrical type 2 superconcentric with the rotating body (50).
A conductor (138) is provided. And the permanent magnet part (136)
And superconductor section (137) constitute superconducting bearing section (139)
Have been. Also, the cylindrical part (1
27) In the part surrounded by the upper half of
An annular superconductor section (140) is provided concentrically with (50).
You. Superconductor part (140) is concentric with rotating body (50)
It is provided with a thick cylindrical second-class superconductor (141).
You. Then, the lower surface of the superconductor section (140) and the horizontal disc-shaped section (1
The superconducting bearing (142) is formed by the permanent magnet (130) of (26).
The outer peripheral surface of the superconductor part (140) and the cylindrical part (127)
The superconducting bearing (14)
3) is formed. That is, the superconductor (141) is
Also serves as the superconductor for the two superconducting bearings (142, 143)
You. In FIG. 8, the water of the flywheel (125)
On the lower surface of the flat disk-shaped part (126), a plurality of concentric
Annular grooves (144) are formed, and a ring is formed in each annular groove (144).
The permanent magnet (145) is fitted and fixed
A permanent magnet portion (146) is formed. Above cylindrical part (127)
In the part surrounded by the half, the fixed part is the same as the rotating body (50).
An annular superconductor portion (147) is provided in a core shape. Superconductivity
The body part (147) has a cylindrical second shape concentric with the rotating body (50).
A seed superconductor (148). Then, the permanent magnet part (1
The superconducting bearing (149) is formed by the superconductor (147) and the superconductor (147).
It is configured. Also, the flywheel (125)
Around the lower part of the part (127)
An annular superconductor section (150) is provided concentrically with the rolling element (50).
I have. The superconductor (150) is concentric with the rotating body (50).
A thick cylindrical second-class superconductor (151).
You. Then, the upper surface of the superconductor part (150) and the horizontal disk-shaped part (1
The superconducting bearing (152) is formed by the permanent magnet (146) of (26).
The outer peripheral surface of the superconductor part (150) and the cylindrical part (127)
The superconducting bearing (15
3) is formed. That is, the superconductor (151) is
Also serves as the superconductor of the two superconducting bearings (152, 153)
You. In FIG. 9, the water of the flywheel (125)
On both upper and lower surfaces of the flat disk-shaped part (126),
A plurality of annular grooves (128) and (144) are formed concentrically, and each annular groove is formed.
The annular permanent magnets (129) and (145) are fitted into the grooves (128) and (144).
The permanent magnets (130) and (146) are shaped
Has been established. In the upper half and lower half of the cylindrical part (127)
In the enclosed part, the rotating body (50) is
The annular superconductor portions (140) and (150) are provided concentrically.
Each superconductor section (140) (150) is concentric with the rotating body (50).
Equipped with thick cylindrical second-class superconductors (141) and (151)
ing. Then, the upper and lower surfaces of the horizontal disc
The lower surfaces of the magnets (130) and (146) and the superconductor (140) and the superconductor
The superconducting bearings (142) and (152) are formed by the upper surface of the conductor (150).
It is configured. Also, the upper half of the cylindrical portion (127) and
The lower permanent magnet part (135) (136) and each superconductor part (140) (15
The superconducting bearing portions (143) and (153) are formed by the outer peripheral surface of (0).
ing. That is, each superconductor (141) (151)
Also serves as superconductor for conductive bearings (142) (143) (152) (153)
You. In FIGS. 2 to 9, the flywheel
A permanent magnet part that constitutes the superconducting bearing part is provided
However, to further increase the stored energy, permanent magnets
The rotating body is separate from the flywheel where the
The flywheel may be fixedly provided. Ma
Also, in FIGS. 2 to 9, the flywheel has a superconducting shaft.
Although a permanent magnet part constituting the receiving part is provided,
In addition, a member for providing a permanent magnet portion and a flywheel
May be separately provided in a fixed manner. Furthermore, the figure
1, 2, 4, and 6 to 9, the rotating body is
Super in both the radial and axial directions
It is designed to be supported by conductive bearings,
In either direction, the magnetic repulsion of the permanent magnet or the magnetic
It is supported by magnetic bearings using attractive force
Is also good. [0051] The rotation loss of the superconducting bearing of the present invention is measured.
MethodAccording to the above, as described above, the rotation of the superconducting bearing portion
The superconducting bearing is provided because the loss can be determined.
Before incorporating it into a real device, for example, a power storage device,
Annular permanent magnet part and annular superconductivity constituting the conductive bearing part
The optimal specification of the body can be determined. Therefore,
An actual device equipped with a superconducting bearing as in the past,
For example, the power storage device can be replaced by a ring-shaped permanent
Operation with various specifications of magnet and annular superconductor
It is not necessary to use a ring-shaped permanent
Work to determine the optimal specifications for the magnet and annular superconductor
Becomes easier.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically showing an entire configuration of a rotation loss measuring device for a superconducting bearing used in a method of the present invention. FIG. 2 is a perspective view schematically showing an overall configuration of a power storage device including a superconducting bearing portion whose rotation loss has been measured by the method according to the present invention. FIG. 3 is a partial vertical sectional view schematically showing a first modification of a superconducting bearing portion of the power storage device. FIG. 4 is a partial vertical sectional view schematically showing a second modification of the superconducting bearing of the power storage device. FIG. 5 is a partial vertical sectional view schematically showing a third modification of the superconducting bearing of the power storage device. FIG. 6 is a partial vertical sectional view schematically showing a fourth modification of the superconducting bearing of the power storage device. FIG. 7 is a partial vertical sectional view schematically showing a fifth modification of the superconducting bearing of the power storage device. FIG. 8 is a partial vertical sectional view schematically showing a sixth modification of the superconducting bearing of the power storage device. FIG. 9 is a partial vertical sectional view schematically showing a seventh modification of the superconducting bearing of the power storage device. [Description of References] (1) Rotating body (2) Radial superconducting bearing (3) Axial superconducting bearing (4) Radial magnetic bearing (5) Radial magnetic bearing (6) Permanent magnet (7) Permanent magnet (8) Rotor (9) Stator (10) Rotary drive motor (11) Rotation speed sensor (17) First annular permanent magnet section (22) Second annular permanent magnet section (26) First annular Superconductor section (34) Second annular superconductor section

Continuation of the front page (72) Ryoichi Takahata 3-5-8 Minamisenba, Chuo-ku, Osaka-shi Koyo Seiko Co., Ltd. (72) Inventor Hirotoyo Miyagawa 3-5-8 Minamisenba, Chuo-ku, Osaka-shi Koyo Seiko JP-A-6-129427 (JP, A) JP-A-4-272507 (JP, A) JP-A-6-81841 (JP, A) JP-A-5-10328 (JP, A A) Hikaru Hei 2-101124 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01L 3/26 F16C 32/04

Claims (1)

(57) [Claim 1] A rotating body, an annular permanent magnet portion concentrically attached to the rotating body, and an annular superconductor portion attached to the fixed portion so as to face the permanent magnet portion. A superconducting bearing portion comprising: a superconducting bearing portion; and a radial magnetic bearing portion which is provided at two different height positions axially separated from the superconducting bearing portion and controls two mutually orthogonal radial positions of the rotating body. A magnet for floating the rotating body in a non-contact state with respect to the fixed portion, a rotation driving motor including a rotor provided on the rotating body and a stator provided on the fixed portion and arranged around the rotor, and a rotating body. A rotational speed sensor for detecting the rotational speed of the
A method for measuring the rotational loss of a bearing, in which a rotating body is lifted up in a non-contact state with a fixed part by a magnet.
After that, the fixed part of the rotating body is
Determine the relative position in the radial direction with respect to, then rotate
Activates the drive motor to rotate the rotating body at a specified speed.
After that, stop the motor and rotate the rotating body freely,
The rotation speed change at this time is detected by a rotation speed sensor, and
The first rotation loss is obtained by using the data of
After floating, the rotating body is
Determine the relative position in the radial direction with respect to the
To cool the superconductor in the annular superconductor part of the superconducting bearing
While maintaining the superconducting state, the rotary drive motor is activated.
After rotating the rotating body at the same speed as above,
Is stopped and the rotating body rotates freely, and the rotation speed at this time
Degree change is detected by the rotation speed sensor, and the data is used
Determining a second rotational loss and subtracting the first rotational loss from the second rotational loss.
And the rotation loss of the superconducting bearing is determined by
Method for measuring rotation loss of superconducting bearing part.