JPS59190083A - Propulsive force generator - Google Patents

Abstract

PURPOSE:To improve propulsion efficiency by fixing a hydrofoil to a rolling member extended above the sea surface from an ocean structure and rolling the hydrofoil up and down by means of a rolling member. CONSTITUTION:Rolling rods 5, 6 extending back and fro are fixed rotatably around a shaft 7 on an upper deck 4 of a vessel. Sliders 11 are fixed movably in the axial direction at the rear ends of each rolling member 5, 6 while foil supporting members 12, 13 are provided rollably back and fro on the slider 11. A hydrofoil 16 is pivoted to the foil supporting members 12, 13. A motor 27 is rotated with proper speed through a switch 34 while the rotary direction is exchanged with proper period to reciprocate the hydrofoil 16 up and down with predetermined amplitude and period through a pinion 29, rack 26, power transmission rod 24, rolling members 5, 6 and foil supporting members 12, 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ffI force generator for use in marine structures such as ships.

It is a well-known fact that the efficiency of the helical propulsors, which are currently widely used in ships, can be improved by making them larger in diameter and rotating at lower speeds to lower the wheel speed. However, especially for vessels such as wide and shallow water vessels, the diameter of the helical propulsion device cannot be increased beyond a certain limit due to water limitations, resulting in a reduction in propulsion efficiency.

An object of the present invention is to provide an efficient thrust generating device that solves the above problems.

The thrust generating device of the first invention includes a swinging member that is installed in a marine structure so as to be able to rotate about a substantially horizontal axis and extends above the sea surface, and a portion of the swinging member that extends above the sea surface. A vertically movable wing support member whose upper part is connected to the sea surface and whose lower part is submerged under the sea surface, a hydrofoil attached almost horizontally to the underwater part of the wing support member, and a swinging member that swings upward 1. It is equipped with a wing drive device.

The thrust generating device of the second invention includes a swinging member installed in a marine structure so as to be able to rotate around a substantially horizontal axis and protruding above the sea surface, and a swinging member = 4- on the sea surface. Hydrofoils that are installed almost horizontally in the underwater part of the wing support member, such as a vertically movable wing support member whose upper part is connected to the part that overhangs in the direction and whose lower part is submerged below the sea surface, and a swinging member. It is equipped with a wing drive device that swings the structure up and down, and a fixed hydrofoil that is installed almost horizontally in the underwater part of the marine structure.

The thrust generating device of the third invention is configured such that the offshore structure can rotate about a substantially horizontal axis. A movable upper wing support member whose upper part is connected to the upper part and whose lower part is submerged under the sea surface, a hydrofoil attached almost horizontally to the underwater part of the wing support member, and a swinging member that swings up and down. A device comprising a driving device for moving the offshore structure, a position-adjustable weight mounted on the swinging member, and an adjustable-position elastic body installed between the offshore structure and the swinging member. It is.

It is known that forces are generated in the waves (on a nearly horizontally blown hydrofoil moving from the trailing edge to the leading edge of the wing).

It is also known that by reciprocating the horizontal 'J'K EQ up and down underwater, a 111 force can be generated from the trailing edge of the wing toward the leading edge.

Therefore, according to the present invention, the swinging member is swung up and down by the blade drive device. By reciprocating the hydrofoil below -F via the wing support member, it is possible to avoid generating an llf force on the hydrofoil. When this invention is applied to a ship, the span of the hydrofoil can be made equal to or even larger than the width of the ship, so a larger restraining area can be secured compared to a helical propulsion device. The degree of load can be significantly lowered (thereby, the propulsion efficiency can be improved).

In addition, when this invention is applied to other marine structures floating at a fixed position on the sea surface, the hydrofoils can be moved back and forth upward to eliminate drifting forces such as wave source force. By generating a strong thrust force, it is possible to prevent marine structures from drifting and to reliably hold them in a fixed position. In addition, when there are waves in the sea, the wave energy is converted to thrust, and the waves also generate thrust on the hydrofoil, so it is possible to reduce part or all of the thrust generation energy to wave energy. It is possible. In this case, if the hydrofoil is not driven by a blade drive device and is fixed at a fixed position or supported elastically so that it can freely move up and down, thrust can be generated using wave energy alone.

According to the second invention, fixed hydrofoils are installed almost horizontally in the underwater part of the marine structure, so that waves can also be generated on this hill. In addition to improving efficiency, this blade can also reduce the oscillation of marine structures. In particular, in the case of ships, fixed hydrofoils extend out from the outside of the ship.ii! It is desirable that the wings be foldable for safety and convenience when entering and exiting the port and when berthing.

According to the third aspect of the invention, the swinging member is provided with a weight whose position is adjustable, and ? 10 Since an elastic body whose position can be adjusted is provided between the structure and the swinging member, the load on the blade drive device can be reduced, as will be explained next. For example, in order to efficiently propel a large ship, it is necessary to move large hydrofoils back and forth at low speeds, so the large fluctuations in inertia caused by the back and forth movement of the hydrofoils must be reduced in some way. It is necessary to absorb it. If the blade drive device is to withstand the inertia force fluctuations by directly directing the blade drive device to the inertia force fluctuations, a large-capacity blade drive device d is required. According to the third invention, the vibration system is configured by providing an elastic body between the marine structure and the swinging member, and the spring constant and inertia of the vibration system are adjusted by adjusting the positions of the elastic body and the weight. This allows the elastic body to absorb the fluctuations in inertia caused by the reciprocating movement of the hydrofoil, allowing the blade drive device to supply only the power needed to generate thrust. It is possible to reduce the load on In addition, as mentioned above, when the hydrofoil is used as a wing drive device to allow the hydrofoil to move freely up and down without any drive, and to generate thrust from wave energy alone, wave energy can be absorbed most efficiently. Adjust the spring constant of the vibration system a3J: and W4 so that 11i)'? I can do it.

In particular, in the case of a ship, it is desirable to provide two hydrofoils symmetrically on the left and right sides with respect to the center line of the ship, and to connect the wing support members of each hydrofoil to rocking members that are driven separately. If the left and right hydrofoils can be driven separately in this way, the hull can be turned using the hydrofoils.

In addition, in order to secure as large a suspension surface as possible, it is desirable to extend a portion of the hydrofoil outward from the outer surface of the hull. It is desirable to make it possible.

For example, the hydrofoil may be fixed to a wing support member and be configured to perform only vertical and reciprocating movement (CC), but in addition to vertical and reciprocating movement, the hydrofoil may also rotate around a substantially horizontal axis to change the angle of attack (
It is desirable to also perform pitching. In this way, even more effective Iit force can be expected to be generated. In order to enable pitching of the hydrofoil, for example, the front part of the hydrofoil is attached to a wing support member so as to be able to rotate around a substantially horizontal axis, and the rear part of the hydrofoil is elastically supported by this wing support member, or Alternatively, the front part d5 and the rear part of the hydrofoil may be attached to separate wing support members (the front and rear wing support members may be connected to swinging members that are driven separately).

The present invention will be described in detail below with reference to the drawings.

1 and 2 show a ship equipped with a thrust generating device according to the present invention.

Fixed hydrofoils (3) are installed symmetrically on both left and right sides (2) of the front part of the hull (1). It extends horizontally to the hull (1) and can be folded vertically upwards at the recessed part of the hull (1) for storage.

The hydrofoil (3) may be folded by suitable means, such as a hydraulic cylinder.

On the upper deck (4) of the ship, four rod-shaped swinging members (5) and (6) extending in the fore-and-aft direction are attached, two on each side. Each swinging member (5) (6) is attached to a platform (8) t on the upper deck (4) so as to be able to rotate around a support shaft (7) extending horizontally in the left-right direction. )(
6) The rear end of the ship extends above the sea surface (10) behind the stern end (9). A slider (11) is attached to the rear end of each swing member (5) (6) so as to be movable in the axial direction, and the upper ends of the four vertical rod-shaped wing support members (12) (13) extend in the left-right direction. It is attached to each slider (11) so that it can rotate by 12 degrees around the horizontal axis. At the upper part of the stern end (9), each swinging member (5) (
6) Extends horizontally just below tc/one arm (14)
(15) are provided, and each wing support member (12) (1
3) passes through vertical guide holes provided in the six arms (14) and (15) so as to be vertically movable.

The two inner wing support members (12) in the left-right direction are located at the stern end (9
), and the two outer wing support members (13) are located rearward from these, and each wing support member <12)
The lower part of (13> is submerged below the sea surface (10). Immediately behind the stern end (9) and below the sea surface (10), two approximately horizontal hydrofoils (16) are arranged symmetrically, As shown below, the left wing (16) is attached to the left wing support member (12).
(13), and the two I (1B) on the right side are attached to the lower ends of the two right wing support members (12) (13), respectively. The upper surface is attached to the lower end of the front wing support member (12) so that it can rotate about a horizontal axis extending in the left-right direction.A slider (
17) is taken so that it can be moved back and forth, and each slider (1
7) is attached to the lower end of the rear wing support member (13) so that it can rotate about a horizontal axis extending in the left-right direction. Also, a portion of each hydrofoil (16) is attached to the outside of the hull. These overhanging parts (18), which extend outward from the side surfaces (2), can be folded vertically upward and stored, as in the case of a fixed hydrofoil (3). .

Weights (19) whose positions can be adjusted in the axial direction are attached to the front and rear sides of the support 1llIl (7) of each swinging part U(5)(6).In addition, each swinging part IJ (5)(6
) A slider (20) whose position can be adjusted in the axial direction is attached to the front side of the wing support member slider (11), and the slider (20) whose position can be adjusted in the longitudinal direction is installed on the upper deck (4) directly below each slider (20). Four movable platforms (21) are attached that can move the vehicle. Then, each moving table (21) and the slider (2
0), a spring (elastic body>(22)) is provided to constitute a vibration system.

A slider (23) is attached to the front side of the spring slider (20) of each swing member (5) (6) so as to be movable in the axial direction, and the upper ends of the four vertical power transmission rods (24) Able to rotate around a horizontal axis extending in the left and right direction J: Attached to each slider (23).Each power transmission rod (24)
The metal rod (25) hangs down into the engine room (25) through a vertical guide hole provided in the upper deck (4) so as to be vertically movable.
24) = 15- A cover (26) is installed at the lower end.

Four DC motors (27) are installed in the engine room (25), and these Tanabata shafts (28) have pinions that mesh with the racks (26) of the corresponding power transmission rods (24). (29) and a flywheel (30) are fixed. In addition, the engine room (25) has an engine (31).
A power generation l1N (32) driven by this is installed, and four motors (27) are connected to the generator (32) via changeover switches (33). , and these constitute a driving device, and the four swinging members (5) and (6) are driven separately and independently.

That is, the motor (27) is switched by the changeover switch (33).
) at an appropriate speed and switching the direction of rotation at an appropriate period, the power transmission rod (24), swinging member 16-(5)(6) and wing support member ( 12> (13) reciprocates downward F with a constant amplitude and period. By changing the rotation speed and rotation direction switching period of each motor (27), the corresponding blade support portion vJ' ( 1
2> The amplitude and period of the vertical column 1u movement in (13) can be changed separately.

In the above ship, the rotation speed and rotation direction switching period of the motor (27) are set appropriately using the changeover switch (33), and the weights (19) and springs of each swinging member (5) and (6) are set appropriately. By adjusting the position of (22) and appropriately changing the spring constant and inertia of the vibration system, you can do it underwater!
(1G) performs up-and-down reciprocating movement and bidding with appropriate amplitude, period, and phase difference, thereby making the hydrofoil (
16) A forward thrust is generated. Since the spring constant and inertia of the vibration system can be changed separately, the hydrofoil (1
G) can be made to perform up-and-down reciprocation and pitching, and once the entire vibration system is synchronized, the small engine (31) can drive the large hydrofoil (16). Note that when the ship is traveling straight, the movement of the hydrofoils (16) is adjusted so that the thrust generated on the left and right hydrofoils (16) is equal to each other.

Furthermore, by changing the size of the thrusts generated on the left and right hydrofoils (16), the hull (1) can be turned left and right. Of course, the left and right hydrofoils (16) can also serve as rudders. In addition, a fixed hydrofoil (3) is installed at the front of the hull (1), so the stern end <9
), it is possible to reduce oscillations such as vertical movement, pitching, and rolling of the hull (1) in balance with the movement of the hydrofoil (16) of the hull (1).

If there are waves, thrust can be generated using wave energy alone, as shown below.

1j, that is, in this case, the blade drive device is set in a free state so that each swinging member <5) (6) can freely swing up and down. If you do this, you'll be in the water! (1G)
The waves cause vertical and reciprocating movement and pitching, which generates forward thrust.

At this time, the spring constant and inertia of the vibration system are adjusted so as to absorb wave energy most efficiently.

FIG. 3 shows an embodiment different from the one described in "-", in which the hydrofoil (34) has one swinging member (35) or a plurality of swinging members (35) swinging in synchronization with each other. It is attached to the wing (4) via the wing support member (36).
The front part of 34) is attached to the wing support member (36) via a horizontal bin (37) extending in the left-right direction
It is rotatably attached to the bottom end of the.

A horizontal auxiliary member (38) is provided at the bottom of the wing support member (36).
is fixed, and the tip of the auxiliary member (38) and 1 m (34)
A spring (39) is provided between the rear part and the rear part. The hydrofoil (34) is normally supported horizontally by a spring (39). The rest is the same as in the above embodiment, and the same parts are given the same reference numerals. In the above, when the wing support member (36) reciprocates up and down due to the vertical swing of the swinging member (35), the hydrofoil (34) also reciprocates up and down, but the hydrofoil (34) Since the hydrofoil (34) is rotatably and elastically supported by the wing support member (36) by the spring (39), pitching occurs in the hydrofoil (34) at the same time as it moves up and down. In addition, the swinging member (
Even when the hydrofoil (35) is made to be able to swing freely up and down without being driven by the blade drive device 20-, the hydrofoil (34) performs vertical reciprocation and pitching simultaneously due to the waves.

[Brief explanation of drawings]

Figures 1 and 2 show one embodiment of the present invention, in which Figure 1 is a partially cutaway side view of a ship, Figure 2 is a plan view of the same, and Figure 3 is another embodiment of the present invention. FIG. 2 is an enlarged vertical sectional view of a main part showing an example. (1)...Hull, (2)...Hull outer surface, (3)...
...Hydrofoil, <5) (6) (35)...Swinging member, (10)...Sea surface, (12> (13)
(36)...Wing support member, (16) (34)...
Hydrofoil, <18)...Hydrofoil overhanging part, (19)・
... Weight, (22) ... Spring (elastic body) Patent applicant Hitachi Zosen Corporation

Claims (9)

[Claims] (1) The offshore structure is designed so that it can rotate around a substantially horizontal axis. It is equipped with a wing support member whose lower part is submerged under the sea surface and is movable up and down, a hydrofoil attached almost horizontally to the underwater part of the wing support member, and a wing drive equipment that allows the swinging member to swing up and down. A power generating device. (2) The offshore structure is designed to be able to rotate around a substantially horizontal axis; a swinging member that extends above the sea surface with a U-shape; and an upper portion connected to the portion of the swinging member that extends above the sea surface. A wing support member whose lower part is submerged in the sea surface T and is movable up and down; an underwater part of the wing support member; a hydrofoil mounted almost horizontally; a wing drive device that swings the swinging member up and down; A thrust generator equipped with a fixed hydrofoil installed almost horizontally in the underwater part of an offshore structure. (3) The thrust generating device according to claim 2, wherein the fixed hydrofoil is provided in an outwardly projecting manner on the outer surface of the marine structure and is foldable. (4) A rocking member that is mounted on the offshore structure so as to be able to rotate around a substantially horizontal axis and extends above the sea surface, and an upper portion of the rocking member that is connected to the part that extends above the sea surface. a vertically movable wing support member whose lower part is submerged below the sea surface; a hydrofoil that is attached almost horizontally to the underwater part of the wing support member;
A blade drive device that swings the swinging member up and down, a weight attached to the swinging member that can be adjusted, and a structure installed between the swinging member such as an offshore structure. Off-force firing bulldog with adjustable I/R bullet 1 (1 body). (5) The hydrofoil is located 2 h to the right of the center line of the offshore structure.
The blade support members of each hydrofoil are connected to swinging members that are driven separately. IIl force generator according to. (6) A portion of the hydrofoil protrudes outward from the outer surface of the marine structure, and the protruding portion of the hydrofoil is foldable in 4Rs. Claim 4 or 5 The thrust generator described in . (7) The thrust generating device according to any one of Claims 4 and 6, wherein the hydrofoil is fixed to the wing support member. (8) The front part of the hydrofoil is attached to the wing support member so that the rotation around the approximately horizontal axis that changes the angle of attack is C. 1. The H1 force generating device according to any one of claims 4 to 6, which is supported by H1. (9) A claim in which the front and rear parts of the hydrofoil are each taken up by separate IQ holding members, and each of the front and rear wing support members is connected to a swinging member that is driven separately. The thrust generating device according to any one of items 4 to 6.