JPH0239169B2 - CHOKOSOKUKAITENFURAIHOIIRUNOENERUGINYUSHUTSURYOKUSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an energy input/output device for a flywheel that rotates at an extremely high speed.

[Prior art] When an energy storage flywheel is rotated at an ultra-high speed, surplus energy is stored in the form of rotational energy and taken out for use when needed, the flywheel rotates at an ultra-high speed. , it is extremely difficult to extract energy efficiently; for example, even if you try to connect it directly to a generator, the rotor of the generator cannot withstand ultra-high speed rotation, and if you use a speed reduction mechanism etc. to slow down the rotation, the energy transfer will be difficult. A significant drop in efficiency is inevitable.

[Problems to be Solved by the Invention] The present invention provides a structure for withstanding the ultra-high-speed rotation required of a flywheel that rotates at ultra-high speed when a rotating machine that functions as a generator or an electric motor is incorporated into the flywheel. It is an object of the present invention to provide an energy input/output device that is useful for highly efficient energy conversion in energy conversion rotating machines.

[Means for Solving the Problems] In order to achieve the above object, the energy input/output device of the present invention is provided with a large number of sliding guide grooves that open in the radial direction on the outer periphery of a hub on the rotating shaft, and In an ultra-high-speed rotating flywheel in which a sliding member is inserted into an annular fiber-reinforced plastic rim, the sliding member is formed of a permanent magnet, and a permanent magnet is placed inside the sliding member. It is characterized by a stator having a coil that generates power or rotational force through interaction with magnets.

[Operations and Effects] In the energy input/output device having the above configuration, a sliding member that connects the hub and rim on the rotating shaft is formed of a permanent magnet, and a sliding member is provided inside the sliding member for interaction with the permanent magnet. Since the stator is equipped with a coil that generates power or rotational force, if the rotational energy of the rim that constitutes the flywheel is converted into electric energy by the sliding member and the coil, it functions as a generator, and vice versa. If the coil applies electromagnetic rotational force to the sliding member, it functions as an electric motor.

When the generator and electric motor are operated as any rotating machine, as the rotational speed increases, a large force based on centrifugal force acts on the rim etc.
The rim expands in diameter in the radial direction, but due to this deformation, the sliding member fitted into the sliding guide groove of the hub is displaced in a radial direction and pulled out from the hub, preventing damage to each part, and also preventing the sliding member from being damaged. The force with which the rim contacts the inner circumference of the rim increases, which makes it possible to adjust the radial stress in the rim to the compressive stress side, thus making it sufficient to withstand rotation at extremely high speeds. .

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

In Figures 1 and 2, reference numeral 1 denotes a rotating shaft that rotates using surplus energy, etc. The outer peripheral surface of an aluminum hub 2 attached to the shaft 1 is machined into a gear shape, and the outer circumferential surface of the hub 2 is machined into a gear shape. In addition, a large number of slide guide grooves 3 opening in the radial direction are provided, and a circumferential slide guide groove 4 is provided on the outer peripheral surface thereof.
In addition, a large number of slide guide grooves 3, for example, 24 or
The 36 sliding members 5 are composed of permanent magnets, and in order to rotate integrally with the hub 2, sliding guide protrusions 7 are provided in the radial direction on the inner surface of the rim abutment surface 6 facing the outer periphery of the hub 2. The guide protrusion 7 is fitted into the sliding guide grooves 3 and 4 of the hub 2.

The plurality of sliding members 5 are formed by press-fitting annular rims 11, 11 made of fiber-reinforced plastic on the outside with circumferential protrusions 9 in between, and connecting each sliding member 5 to the rims 11, 11. and are configured to rotate together due to the frictional force acting between them. It is preferable that each of the rims 11 is constructed by integrating an inner rim 12 made of glass fiber reinforced plastic (GFRP) and an outer rim 13 made of carbon fiber reinforced plastic (CFRP), for example. These said inner and outer rims 12,1
3, each radial width D ₁ , D ₂ and their ratio
D ₁ /D ₂ is the specific gravity of the constituent material of both rims 12 and 13;
The optimum value is determined by strength, elasticity, etc. Furthermore, as is clearly shown in FIG. 1, in order to incorporate the flywheel formed as described above into a rotating machine for energy conversion, an inner side of the sliding member 5 is provided so as to interact with the permanent magnets constituting it. A stator 16 having a coil 17 for generating power or rotational force is arranged.

The stator 16 can not only be in a stationary state but also be configured to be rotatable by any means, and has a shaft hole 18 in its center portion into which the rotating shaft 1 is inserted. Drilled boss 1
A coil 17 is provided on the outer periphery of a hub 20 extending radially from the hub 9 .

The gap 21 between the outer circumferential surface of the coil 17 and the inner circumferential surface of the sliding member 5 is created by considering that the sliding member 5 is displaced in the radial direction due to centrifugal force as the sliding member 5 rotates. It is formed to be as narrow as possible.

In the flywheel configured as described above, when the rotating shaft 1 is rotated by surplus energy, the sliding member 5 and the rim 11 that engage with the hub 2 on the rotating shaft 1 rotate, and the above energy is thereby rotated. Stored in the flywheel in the form of axial energy.
Further, the sliding member 5 (permanent magnet) can be rotationally driven together with the rim 11 by electromagnetic force or the like.
This allows energy to be stored in the flywheel.

Furthermore, the rotating mechanism can function both as a generator and as an electric motor. When functioning as a generator, rotation of the flywheel generates an electromotive force in the coil 17 of the stator 16 to generate electricity. The power generation described above is performed extremely efficiently because the flywheel does not slow down even if it is rotating at an extremely high speed.

When the flywheel is rotated at high speed as a rotor, a significantly large centrifugal force acts on the rim 11, and this centrifugal force causes the sliding member 5 to move between the sliding guide protrusion 7 and the sliding guide grooves 3 and 4. By being guided in a radial direction away from the hub 2 and pressing against the inner peripheral surface of the rim 11, the radial stress within the rim 11 is converted into compressive stress.
Damage to the flywheel is prevented.

Furthermore, when the above-mentioned rotating machine is used as an electric motor, it is sufficient to generate an electromagnetic force for rotating the sliding member 5 (permanent magnet) by passing a current through the coil 17, as in a general-purpose electric motor. This causes the sliding member 5 and the rim 11 to rotate.
By rotating the sliding member 5 and the rim 11 at an ultra-high speed, it can be used as an ultra-high-speed, high-output motor, but by rotating the stator 16, the relative rotational speed with respect to the flywheel can be reduced. It is also possible to lower the rotational speed, thereby extracting mechanical power at low rotational speeds.

[Effects of the Invention] As described above, according to the input/output device of the present invention, it is possible to obtain unprecedented high-speed rotation in a compact size, and especially when used as an ultra-high-speed electric motor,
With a rim diameter of 200mm, it is possible to achieve rotations of around 75,000rpm. Furthermore, since the entire rotating machine can be housed in a vacuum chamber, there is no need for complicated vacuum sealing.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a main part of an embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view with the stator omitted. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Hub, 4... Sliding guide groove, 5... Sliding member, 11... Rim, 16...
Stator, 17...coil.

Claims (1)

[Claims] 1. In an ultra-high-speed rotating flywheel in which a large number of sliding guide grooves opening in the radial direction are provided on the outer periphery of a hub on a rotating shaft, and sliding members attached to an annular fiber-reinforced plastic rim are inserted into these grooves. , the above-mentioned sliding member is formed of a permanent magnet, and a stator having a coil that generates power or rotational force by interaction with the permanent magnets constituting the sliding member is arranged inside the sliding member. An energy input/output device featuring an ultra-high-speed rotating flywheel.