JPH0742231Y2 - Electromagnetic induction prime mover - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electromagnetic induction prime mover applied to ships, underwater vehicles, and the like.

[Conventional technology]

The principle of a conventional electromagnetic propulsion device for a ship or the like will be described with reference to FIGS. 6 and 7.

In FIGS. 6 and 7, 51 and 52 are electromagnets (or superconducting electromagnets) that generate a magnetic field, 53 is a power source for exciting the electromagnets 51 and 52, and 54 is seawater that receives an electromagnetic force. 55,5
6 is provided between the electromagnets 51, 52 so as to face each other.
The magnetic field generated by the
An electrode for flowing a current I (the direction is the direction of the arrow shown in FIG. 7) perpendicular to the seawater 54 into the seawater 54, and 57 for supplying a current to the electrodes 55, 56. Power source.

In the above, a current is supplied from the power source 53 to the electromagnets (or superconducting electromagnets) 51, 52 for generating a magnetic field to generate a large magnetic field in the seawater 54, and a current intersecting this magnetic field is applied to the electrode 5
An electromagnetic force F (the direction is the direction of the arrow shown in FIG. 6) is generated by flowing the seawater 54 from 5,56. This electromagnetic force F can move the seawater 54.

In the electromagnetic propulsion system of a ship, the devices shown in FIGS. 6 and 7 are installed in a part of the hull, and the propulsive force of the hull can be obtained by the reaction of the electromagnetic force acting on the seawater 54.

[Problems to be solved by the device]

In a conventional electromagnetic propulsion device for a ship or the like, when an electromagnetic force is generated in seawater, a large current (for example, several thousand
A) need to be flushed. In this case, the electric resistance of seawater is very large, and accordingly, the power loss during energization of seawater is very large, and the efficiency of the electromagnetic propulsion system is greatly reduced.

Further, due to this low efficiency, the size and weight of the entire apparatus have been increased. (In order to obtain the required propulsive force, it is necessary to increase the magnetic field and the electric current, resulting in an increase in the size and weight of the electromagnet, electrode, power source, etc.) The present invention is intended to solve the above problems. It is a thing.

[Means for Solving the Problems]

The electromagnetic induction motor of the present invention is a cylindrical electromagnet that generates a magnetic field penetrating the inside, an inner cylinder that has blades radially arranged on the outer peripheral surface and has rotating shafts at both ends. Section, an outer cylindrical section which is arranged so as to enclose the inner cylindrical section and the wing and is joined to the rotary shaft via a shaft seal section and a bearing section, an inner peripheral surface of the outer cylindrical section and an outer peripheral surface of the inner cylindrical section. One electrode and the other electrode, respectively, one power source connected between the same electrode and the other electrode and the other power source connected to the electromagnet, and the outer cylinder part and the inner cylinder part It is characterized by having a liquid metal filled between the two.

[Action]

In the above, a current is supplied to the electromagnet from one power source to generate a magnetic field penetrating the electromagnet. Further, an electric current is supplied from one power source, and an electric current is caused to flow between the one electrode filled with the liquid metal and the other electrode. Since the current flowing in the liquid metal flows in the direction intersecting with the magnetic field, the liquid metal receives an electromagnetic force generated by the action of the current and the magnetic field, and the force is transmitted to the blade of the inner cylinder portion and the inner cylinder portion Rotate.

Since the liquid metal has an extremely small electric resistance as compared with seawater which receives an electromagnetic force in a conventional electromagnetic propulsion device such as a ship, the power loss can be significantly reduced.

As described above, in the present invention, the power loss can be significantly reduced, so that the efficiency of the prime mover can be improved and the apparatus such as the electromagnet, the electrode and the power source can be made compact and the weight can be reduced.

〔Example〕

 One embodiment of the present invention is shown in FIGS.

1 and 2, 1 is a cylindrical electromagnet (or superconducting electromagnet) that generates a magnetic field, and the direction of the generated magnetic field (magnetic flux density B) is the direction of the arrow shown in FIG. A power source 2 is connected to the electromagnet 1 and supplies a current for exciting the electromagnet 1. Reference numeral 8 denotes an outer cylindrical portion (casing) provided in the cylindrical electromagnet 1 and having an inner cylindrical portion 7 therein.

Reference numeral 3 is a liquid metal filled between the inner tubular portion 7 and the outer tubular portion 8 and made of sodium, potassium, mercury or the like, and 4,5 are provided on the inner surface of the outer tubular portion 8 and the outer surface of the inner tubular portion 7, respectively. With the electrodes provided, a current I orthogonal to the magnetic field generated by the electromagnet 1
(The direction is the direction of the arrow shown in FIG. 2) is poured into the liquid metal 3. 6 is a power supply for supplying a current to the electrodes 4 and 5.
A plurality of blades 9 are radially installed on the outer peripheral surface of the inner tubular portion 7, and are insulated from the electrodes 5 installed on the outer peripheral surface thereof. Further, the outer cylinder portion 8 itself is fixed to the outside so as not to rotate. 10 is a rotary shaft connected to the inner cylinder portion 7,
A propeller (such as a propeller) is connected to either one of the shafts 10. 11 is because liquid metal 3 does not leak outside,
A shaft seal and a bearing portion for the rotating shaft 10 to rotate smoothly.

In the above, when the electromagnet 1 is excited by the current supplied from the power source 2 to generate a magnetic field and then the current I supplied from the power source 6 is passed through the electrodes 4 and 5, the liquid metal 3 is changed to the arrow in FIG. It receives an electromagnetic force F in the tangential direction of the clockwise circumference as shown.
The blade 9 provided on the inner cylinder portion 7 has a small gap between the electrodes 4 and therefore the leakage of the liquid metal 3 is small.
By the action of, the blade 9 can obtain a rotational force. As a result, the rotary shaft 10 also rotates together with the inner cylinder portion 7 to which the blades 9 are connected, and the propulsion device (propeller or the like) obtains propulsive force.

In this embodiment, the number of revolutions of the thruster can be controlled by the current I flowing through the electrodes 4 and 5.

Further, when comparing the seawater that generates the electromagnetic force in the conventional electromagnetic propulsion device and the liquid metal that generates the electromagnetic force in this embodiment,
Liquid metal has a much smaller electrical resistance. For example,
The electrical conductivity (specific resistance / m, that is, the reciprocal of resistance) is about 4 / m at room temperature for seawater, and about 2 × 10 ⁶ / m at room temperature for liquid metal containing 22% sodium and 78% potassium. However, liquid metal exhibits about 1 million times the electrical conductivity with respect to seawater, and the power loss when liquid metal is energized is a negligibly small value compared to the case of seawater.

Further, the melting point of the liquid metal of 22% sodium and 78% potassium is about -13 ° C, and the liquid metal does not solidify in a normal room temperature atmosphere.

As described above, in the electromagnetic induction prime mover of the present embodiment using the liquid metal, the power loss during energization can be significantly reduced, and the efficiency can be improved.

FIG. 3 shows an example in which the present embodiment is applied to a ship and an underwater vehicle, and two electromagnetic induction motors 21 and 22 are arranged in series to obtain a large propulsive force. 23 is a ship,
Alternatively, a hull of an underwater vehicle, 24 is a rotating shaft for transmitting a rotational force, and 25 is a propeller such as a propeller.

Another embodiment of the present invention is shown in FIG.

In this embodiment shown in FIG. 4, a propeller 31 such as a propeller is directly attached to the inside of the inner cylinder portion 7 of the embodiment shown in FIGS. 1 and 2, and 32 is the inner cylinder portion 7. And a support portion for fixing the propeller 31. In this embodiment, the entire device becomes more compact.

FIG. 5 is an explanatory view showing a state in which the electromagnetic induction motor 43 of another embodiment shown in FIG. 4 is installed in the underwater vehicle 41, and 42 indicates a seawater passage provided in the underwater vehicle. There is.

[Effect of device]

In the electromagnetic induction motor of the present invention, the cylindrical electromagnet generates a magnetic field, and the current flowing between the electrodes provided on the inner peripheral surface of the outer cylindrical portion and the outer peripheral portion of the inner cylindrical portion intersects with the magnetic field to cause the liquid to flow. By applying electromagnetic force to metal and transmitting that force to the wing to rotate the inner cylinder, power loss is greatly reduced compared to conventional electromagnetic propulsion devices such as ships that apply electromagnetic force to seawater. Therefore, the efficiency of the prime mover can be improved, and the apparatus such as the electromagnet, the electrode, and the power supply can be made compact and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is an illustration of an embodiment of the present invention, and FIG. 2 is an illustration of FIG.
II-II arrow view, FIG. 3 is an explanatory view of the above-mentioned one embodiment attached to a ship, and FIG. 4 is an illustration of another embodiment of the present invention,
In illustration of the state FIG. 5 is fitted with the other embodiments in water traveling body, (a) shows the cross sectional view, V _b -V _b in (b) is (a)
FIG. 6 is an explanatory view of a conventional device, and FIG. 7 is a view taken in the direction of arrows VII-VII in FIG. 1 ... electromagnet, 2 ... power supply, 3 ... liquid metal, 4,5 ...
Electrodes, 6 ... Power supply, 7 ... Inner tube, 8 ... Outer tube, 9 ...
… Wings, 10 …… Rotating shafts, 11 …… Shaft seals and bearings, 21,2
2 …… electromagnetic induction motor, 23 …… hull, 24 …… rotating shaft, 25,
31 ... Propeller, 32 ... Support, 41 ... Underwater vehicle, 42 ...
… Seawater passages, 43 …… Electromagnetic induction motors.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Soki 1-1 1-1 Atsunoura-machi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Shigeru Sugano 1-1 Atsunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Masatoshi Sente 1-1, Atsunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries Ltd. Nagasaki Shipyard

Claims (1)

[Scope of utility model registration request] 1. A cylindrical electromagnet for generating a magnetic field penetrating through the inside, an inner cylinder portion provided in the electromagnet, having blades radially arranged on an outer peripheral surface, and having rotary shafts at both ends, An outer cylinder part which is arranged so as to enclose the inner cylinder part and the wing and is joined to the rotary shaft through a shaft seal part and a bearing part, respectively provided on the inner peripheral surface of the outer cylinder part and the outer peripheral surface of the inner cylinder part. One electrode and the other electrode, one power supply connected between the same electrode and the other electrode and the other power supply connected to the electromagnet,
And an electromagnetic induction motor equipped with the liquid metal filled between the outer cylinder part and the inner cylinder part.