JPS63247196A - Hybrid type magnetically propelled ship - Google Patents

Abstract

PURPOSE:To reduce a leakage magnetic field and improve propelling efficiency by providing both external magnetic field type electromagnetic propelling device and an internal magnetic field type electromagnetic propelling device on one ship and separately and independently operating each of them. CONSTITUTION:An external magnetic field type electromagnetic propelling device and an internal magnetic field type electromagnetic propelling device are installed in a hybrid type magnetically propelled ship. The external magnetic field type electromagnetic propelling device consists of a racetrack type superconductive magnet 12 having linear parts in the longitudinal direction of ship and electrodes 13, and the internal magnetic field type electromagnetic propelling device consists of a saddle type superconductive magnet 22 and electrodes 23. Thereby, during navigation on the open sea, the superconductive magnet 12 is excited to make a sea water electric current flow in the electrodes 13, enabling effective operation as an external magnetic field type magnetically propelled ship. Also, at the time of sailing in a harbor, the saddle type magnet 22 is excited to carry out navigation as an internal magnetic field type magnetically propelled ship, removing a leakage magnetic field.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetically propelled ship, which can achieve high propulsion efficiency in the open ocean, and where the effect of magnetic fields on other ships, port facilities, etc. is a problem. In this area, the present invention relates to a hybrid electromagnetic propulsion ship that can navigate with less leakage of magnetic fields to the outside.

[Conventional technology]

As shown in Fig. 2, an electromagnetically propelled ship is constructed by an interaction between a magnetic field B generated near the bottom of the ship by a magnetic field generating electromagnet 2 installed inside the ship's hull 1, and a seawater current J passed between a pair of electrodes 3 installed at the bottom of the ship. The propulsion force is the reaction force F (generated in the magnetic field generating electromagnet) of the force F' that pushes away the seawater generated by the magnetic field, and can be roughly divided into two types, AC type and DC type, depending on the generated magnetic field.

In the AC type, thrust is obtained by interaction with the seawater current induced by the AC magnetic field in the seawater, so electrodes for applying seawater current are not required, but the DC type has higher propulsion efficiency. Furthermore, electromagnetic propulsion vessels can be classified into external magnetic field type and internal magnetic field type depending on the range of the magnetic field generated.

FIG. 3 shows a cross section of an example of an external magnetic field type electromagnetic propulsion vessel. By optimizing the shape of the ship's bottom 1, the magnetic lines of force 21 generated by the magnetic field generating supercurrent 2 and the electric lines of force 31 in the seawater when energized by the seawater current-carrying electrode 3 can be made to intersect at right angles over a wide range. , this provides high propulsion efficiency.

Figures 4 and 5 show an example of an internal magnetic field type electromagnetic propulsion vessel. FIG. 4 is an outline of the hull cross section, and FIG. 5 is a duct cross section. FIG. 5 shows an example in which the electromagnet is a superconducting magnet. In this system, the electromagnetic force acting area 10 is limited to a narrow area inside the duct, and high propulsion efficiency cannot be expected. On the other hand, by covering the outer periphery of the duct with a magnetic shield, magnetic shielding from the outside can be easily achieved.

[Problem that the invention seeks to solve]

In order to put an electromagnetic propulsion ship into practical use, it is first necessary to increase the propulsion efficiency.
It is necessary to conduct various studies on highly efficient methods, such as adopting a C-type external magnetic field type. However, in the case of the external magnetic field type, the magnetic field has a wide area of action, so in ports etc., interaction with other ships and magnetic materials such as port equipment becomes a problem. Therefore, it is impossible to navigate within the port. In addition, the internal magnetic field type, which can easily shield external magnetic field leakage, is not welcome as a practical ship due to efficiency issues, except in some special cases.

An object of the present invention is to provide a means for solving the conflicting problems of propulsion efficiency and leakage magnetic field of electromagnetic propulsion vessels.

[Means for solving problems]

The above object can be achieved by providing two ships with both an external magnetic field type electromagnetic propulsion device and an internal magnetic field type electrode propulsion device so that they can be freely operated separately and independently.

[Effect]

When navigating the open ocean where there is no magnetic material around, efficient navigation can be achieved by operating only the external magnetic field type propulsion system, and it is recommended to use magnetic shielding in areas where ships are congested, in ports, etc. If the ship navigates using only the internal magnetic field type propulsion system, the surrounding area will not be affected by the magnetic field.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows a cross section near the center of the hybrid electromagnetic propulsion vessel in the longitudinal direction. The external magnetic field type electromagnetic propulsion device is composed of a racetrack type superconducting magnet 12 and an electrode 13 having a straight section in the longitudinal direction of the ship, and the distribution of magnetic lines of force and electric lines of force 31 is as shown in FIG. The internal magnetic field type electrode propulsion device is comprised of a saddle-shaped super-electromagnet 22 and an electrode 23 in a duct 4 provided near the bottom of the ship. magnetic field lines 21
, and the electric lines of force 31 have a distribution as shown in FIG. The duct has an inlet at the bottom of the front of the hull and an outlet at the rear of the hull.

According to this embodiment, during ocean navigation, the superconducting magnet 1
2 (in persistent current mode)) By applying a seawater current through the electrode 13, it is possible to operate efficiently as an external magnetic field type electromagnetic propulsion vessel, and it is possible to navigate in areas where there is a risk of affecting other vessels or magnetic materials. At this time, the superconducting magnet 12 is demagnetized, the superconducting spiral magnet 22 is energized, and the electrode 2
By energizing 3, the magnetic field will not leak to the surroundings if it is operated as an internal magnetic field type electromagnetic propulsion ship. In particular, in the case of this example, since a superconducting magnet was used as the conductive magnet for generating the magnetic field, once the magnet is excited, a power source for magnet excitation is no longer required, and the energy required to generate the magnetic field is It has the advantage of not being necessary.

In the figure, 4 is a duct, 5 is a sea surface, 6 is an insulating vacuum tank, 7 is liquid helium, and 8 is a radiation shield.

〔Effect of the invention〕

According to the present invention, the open ocean can be navigated efficiently as an external magnetic field type electromagnetic propulsion vessel, and the internal magnetic field type electromagnetic propulsion vessel can navigate inside a harbor without leaking the magnetic field to the outside.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the present invention near the center of the hull in the longitudinal direction; Fig. 2 is a perspective view illustrating the principle of an electromagnetic propulsion vessel;
Figure 3 is a sectional view of an external magnetic field type electromagnetic propulsion vessel, Figure 4 is a sectional view showing an outline of an internal magnetic field type electromagnetic propulsion vessel, and Figure 5 is a sectional view showing details of the duct part in Figure 4. be.

Claims (1)

[Scope of Claims] 1. In an electromagnetic propulsion ship that obtains propulsion through the interaction between a magnetic field in seawater created by a magnetic field generating electromagnet installed inside the ship and a seawater current flowing from an electrode provided on the surface of the ship, near the bottom of the ship. An external magnetic field type electromagnetic propulsion device that applies a magnetic field to a wide range of seawater and generates propulsive force by applying a seawater current, and a magnetic field is applied only to the inside of a duct installed near the bottom of the ship, and a seawater current is applied inside the duct. A hybrid electromagnetic propulsion vessel characterized by being equipped with an internal magnetic field type electromagnetic propulsion device that generates propulsion by energizing and injecting seawater in a duct. 2. A hybrid electromagnetic propulsion ship according to claim 1, wherein the magnetic field generating electromagnets of the external magnetic field type electromagnetic propulsion device and the internal magnetic field type electromagnetic propulsion device are superconducting electromagnets.