A hull tail anti-roll hydrofoil device and working method

Abstract

A hydrofoil device and working method for anti-rolling at the tail of a hull, belonging to the technical field of ship anti-rolling. The anti-rolling device is arranged at the tail of the hull using a hydrofoil mounting seat, and includes a horizontal hydrofoil, a vertical hydrofoil, a hydrofoil rotating mechanism and a hydrofoil mounting seat. The hydrofoil rotating mechanism can drive the hydrofoil as a whole to rotate around the rotating axis of the hydrofoil rotating mechanism. When the ship is sailing normally, the vertical wing is in a vertical state to reduce the roll of the ship; when the ship needs emergency braking, the hydrofoil as a whole is rotated backward at an appropriate angle to make the tail of the horizontal hydrofoil close to the water surface to achieve an emergency braking effect; when the ship enters a port or passes through shallow sea areas and does not need passive hydrofoil anti-rolling, the hydrofoil as a whole will be rotated to a horizontal position or above the horizontal position, and the entire hydrofoil will leave the water surface. The device solves the problem of violent swaying motion of the ship in high sea conditions, and can efficiently reduce the pitch and heave of the ship, making the ship safer and more comfortable during navigation.

Description

Technical Field

[0001] The invention belongs to the field of ship anti-rolling devices, and in particular relates to a ship stern anti-rolling hydrofoil device. Background Art

[0002] When a ship is sailing in high sea conditions, it is easy to produce large-scale rolling motion under the influence of environmental loads such as waves, which greatly reduces the operability, safety and comfort of the ship. In order to reduce the adverse effects of the rolling motion generated by the ship during navigation on the comfort and structural safety of the ship, various anti-rolling devices have come into being. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a hydrofoil device for reducing the roll of a ship at the stern to reduce the roll motion of the ship under high sea conditions.

[0004] The technical solution of the present invention is as follows: a hydrofoil device for anti-rolling at the tail of a hull, which comprises a hull and a hydrofoil mechanism, wherein the tail of the hull is connected to the hydrofoil mechanism via a hydrofoil mounting seat and a hydrofoil rotating mechanism;

[0005] A reduction motor is arranged on the hydrofoil mounting seat fixed at the stern of the hull, and the reduction motor drives the worm; the reduction motor is arranged in the hydrofoil rotating mechanism, and the hydrofoil rotating mechanism adopts a rotating shaft passing through the sleeve and the two ends are respectively fixed on the end plate, the sleeve is fixed on the hydrofoil mounting seat, and a worm gear is arranged in the middle of the rotating shaft, and the worm gear is meshed with the worm gear to drive the end plate to rotate;

[0006] The two end plates are respectively fixedly connected to the vertical hydrofoils in the hydrofoil mechanism, and the two horizontal hydrofoils in the hydrofoil mechanism form a V-shaped structure. The angle at the connection between the vertical hydrofoil and the horizontal hydrofoil is 80 degrees, the water-facing side of the horizontal hydrofoil is the flat wing beveled edge, and the water-receiving side of the horizontal hydrofoil is the flat wing straight edge, and the angle between the flat wing beveled edge and the flat wing straight edge is 15 degrees.

[0007] A working method of a hydrofoil device for anti-rolling at the rear of a hull, wherein the anti-rolling device is divided into three working states, namely, a passive anti-rolling state, an emergency braking state, and an out-of-water idle state:

[0008] a. Passive anti-roll state: the reduction motor drives the worm to rotate in the forward direction, driving the worm wheel and the rotating shaft to rotate clockwise, so that the vertical hydrofoils fixed on the end plates on both sides of the rotating shaft are in a vertical position, and the passive anti-roll state is achieved; the hydrofoil rotation mechanism controls the vertical hydrofoil to be in a vertical position, and the horizontal hydrofoil will generate an angle of attack relative to the incoming flow direction as the ship pitches, generating a force that hinders the ship's pitching motion, thereby achieving passive anti-roll state;

[0009] b. Out-of-water idle state: the reduction motor drives the worm to rotate in the opposite direction, driving the worm wheel and the rotating shaft to rotate counterclockwise, thereby causing the vertical hydrofoils fixed on the end plates on both sides of the rotating shaft to rotate counterclockwise; when the vertical hydrofoils rotate to a horizontal position or above, the horizontal hydrofoils leave the water surface and enter the out-of-water idle state;

[0010] c. Emergency braking state:

[0011] When entering the emergency braking state from the passive anti-roll state, the reduction motor drives the worm to rotate in the opposite direction, driving the worm wheel and the rotating shaft to rotate counterclockwise, and the vertical hydrofoil rotates around the rotating shaft at an appropriate angle to make the tail of the horizontal hydrofoil close to the water surface; at this time, the horizontal hydrofoil acts on the water surface to generate fluid resistance to achieve emergency braking;

[0012] When entering the emergency braking state from the idle state out of water, the reduction motor drives the worm to rotate forward, driving the worm wheel and the rotating shaft to rotate clockwise, and the vertical hydrofoil rotates around the rotating shaft at an appropriate angle to make the tail of the horizontal hydrofoil close to the water surface; at this time, the horizontal hydrofoil acts on the water surface to generate fluid resistance to achieve emergency braking;

[0013] At this time, the horizontal hydrofoil interacts with the water surface, generating fluid resistance to achieve emergency braking.

[0014] The hydrofoil mounting seat is arranged at the stern of the ship, and the hydrofoil rotating mechanism can drive the hydrofoil mechanism to rotate around the rotating axis of the hydrofoil rotating mechanism, so that the hydrofoil as a whole can be maintained at any angle position.

[0015] The beneficial effects of the present invention are as follows: the ship stern hydrofoil anti-rolling device is divided into three working states, namely, anti-rolling state, emergency braking state and out-of-water idle state.

[0016] When the hydrofoil anti-roll device is in the anti-roll state, the hydrofoil rotation mechanism controls the vertical hydrofoil to be in a vertical position, and the horizontal hydrofoil will generate an angle of attack relative to the incoming flow direction as the ship pitches, and generate a force to hinder the ship's pitch motion, thereby achieving an anti-roll effect. In the emergency braking state, the hydrofoil is rotated backward by a certain angle so that the tail of the horizontal hydrofoil is close to the water surface. At this time, the horizontal hydrofoil acts as a water baffle, generating great fluid resistance to achieve an emergency braking effect. When the ship enters the port or passes through shallow waters and does not need hydrofoil anti-roll, the hydrofoil will rotate to a horizontal position or above, and the horizontal hydrofoil will leave the water surface and enter an idle state out of the water.

[0017] The device drives the worm to rotate through the motor, and drives the turbine to drive the shaft to realize the swing angle of the anti-roll device. Since the worm gear has a self-locking function, the mechanism can stop at any position. The device solves the problem of violent swaying of ships in high sea conditions, and can effectively reduce the pitch and heave of the ship, making the ship safer and more comfortable during navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure diagram of a hydrofoil device for anti-rolling at the stern of a ship.

[0019] Figure 2 The present invention is a partial cross-sectional view of a hydrofoil device for anti-rolling at the stern of a ship.

[0020] Figure 3 yes Figure 2 A is an enlarged view of the middle image.

[0021] Figure 4 It is a side view of a hydrofoil device for anti-rolling at the stern of a ship.

[0022] Figure 5 It is a bottom view of a hydrofoil device for anti-rolling at the stern of a ship.

[0023] Figure 6 It is a roll reduction state diagram of a hydrofoil device at the stern of a ship.

[0024] Figure 7 It is a diagram of the idle state of the hydrofoil device at the rear of the hull when it is out of water.

[0025] Figure 8 It is a diagram of the emergency braking state of the hydrofoil device at the rear of the hull.

[0026] Fig. 9 The present invention is a working principle diagram of a anti-roll hydrofoil of a stern anti-roll hydrofoil device of a hull.

[0027] In the figure: 1, horizontal hydrofoil, 2, vertical hydrofoil, 3, hydrofoil rotation mechanism, 4, hydrofoil mounting seat, 5, hull, 6, hydrofoil mechanism, 7, sleeve, 8, reduction motor, 9, worm, 10, worm gear, 11, rotating shaft, 12, end plate; V, incoming flow velocity at the hydrofoil, f1, horizontal hydrofoil lift in the roll reduction state, f2, horizontal hydrofoil lift in the emergency braking state. DETAILED DESCRIPTION

[0028] like Figures 1 to 5 The hull tail anti-roll hydrofoil device shown comprises a horizontal hydrofoil 1, a vertical hydrofoil 2, a hydrofoil rotating mechanism 3 and a hydrofoil mounting seat 4. The tail of the hull 5 is connected to the hydrofoil mechanism 6 through the hydrofoil mounting seat 4 and the hydrofoil rotating mechanism 3.

[0029] A reduction motor 8 is arranged on the hydrofoil mounting seat 4 fixed at the rear of the hull 5, and the reduction motor 8 drives the worm 9; the reduction motor 8 is arranged in the hydrofoil rotating mechanism 3, and the hydrofoil rotating mechanism 3 adopts a rotating shaft 11 to pass through the two ends of the sleeve 7 and are respectively fixed on the end plate 12, the sleeve 7 is fixed on the hydrofoil mounting seat 4, and a worm gear 10 is arranged in the middle of the rotating shaft 11, and the worm gear 10 is meshed with the worm 9 to drive the end plate 12 to rotate (such as Figure 2 , Figure 3 as shown).

[0030] The two end plates 12 are respectively fixedly connected to the vertical hydrofoil 2 in the hydrofoil mechanism 6, and the V-shaped structure formed by the two horizontal hydrofoils 1 in the hydrofoil mechanism 6, and the angle between the vertical hydrofoil 2 and the horizontal hydrofoil 1 is 80 degrees (such as Figure 4 As shown in FIG. 1 ), the water-facing side of the horizontal hydrofoil 1 is the flat wing oblique edge 1b, the water-receiving side of the horizontal hydrofoil 1 is the flat wing straight edge 1a, and the angle between the flat wing oblique edge 1b and the flat wing straight edge 1a is 15 degrees (as shown in FIG. 1 ). Figure 5 as shown).

[0031] The anti-roll device has three working states: passive anti-roll state, emergency braking state and water-out idle state:

[0032] a. Passive anti-roll state: the reduction motor 8 drives the worm 9 to rotate forward, driving the worm wheel 10 and the rotating shaft 11 to rotate clockwise, so that the vertical hydrofoils 2 fixed on the end plates 12 on both sides of the rotating shaft 11 are in a vertical position, and the passive anti-roll state is achieved; the hydrofoil rotation mechanism controls the vertical hydrofoil to be in a vertical position, and the horizontal hydrofoil 1 will generate an angle of attack relative to the incoming flow direction as the ship pitches, generating a force that hinders the ship's pitching motion, thereby achieving passive anti-roll;

[0033] b. Out-of-water idle state: the reduction motor 8 drives the worm 9 to rotate in the opposite direction, driving the worm wheel 10 and the rotating shaft 11 to rotate counterclockwise, thereby causing the vertical hydrofoil 2 fixed on the end plates 12 on both sides of the rotating shaft 11 to rotate counterclockwise; when the vertical hydrofoil 2 rotates to a horizontal position or above, the horizontal hydrofoil 1 leaves the water surface and enters the out-of-water idle state;

[0034] c. Emergency braking state:

[0035] When entering the emergency braking state from the passive anti-roll state, the reduction motor 8 drives the worm 9 to rotate in the opposite direction, driving the worm wheel 10 and the rotating shaft 11 to rotate counterclockwise, and the vertical hydrofoil 2 rotates around the rotating shaft 11 at an appropriate angle to make the tail of the horizontal hydrofoil 1 close to the water surface; at this time, the horizontal hydrofoil 1 acts on the water surface to generate fluid resistance to achieve emergency braking;

[0036] When entering the emergency braking state from the idle state out of water, the reduction motor 8 drives the worm 9 to rotate forward, driving the worm wheel 10 and the rotating shaft 11 to rotate clockwise, and the vertical hydrofoil 2 rotates around the rotating shaft 11 at an appropriate angle to make the tail of the horizontal hydrofoil 1 close to the water surface; at this time, the horizontal hydrofoil 1 acts on the water surface, generating fluid resistance to achieve emergency braking.

[0037] Figure 6 When the hydrofoil anti-rolling device is in the passive anti-rolling state, the vertical hydrofoil 2 is in a vertical position, and the horizontal hydrofoil 1 will produce an angle of attack relative to the incoming flow direction as the ship pitches, and generate a force to hinder the ship's pitching motion, thereby achieving an anti-rolling effect. Fig. 9As shown, the hull 5 moves forward at a speed V and generates a pitch angle of 5 degrees. Since the horizontal hydrofoil 1 moves in unison with the hull 5, the horizontal hydrofoil 1 generates a 5-degree angle of attack. Due to the action of the water flow, the horizontal hydrofoil generates a lift f1, thereby suppressing the pitch motion of the ship. Figure 5 The figure shows the case where the bow of the ship is raised at an angle of 5 degrees. Similarly, it can be seen that this device will also have the same anti-rolling effect when the bow of the ship is buried.

[0038] like Figure 7 As shown, in the emergency braking state, the hydrofoil mechanism 6 is rotated backward by a certain angle to make the tail of the horizontal hydrofoil close to the water surface. At this time, the horizontal hydrofoil acts as a water baffle, generating fluid resistance f2 under the action of water flow to achieve emergency braking.

[0039] like Figure 8 As shown, when the ship enters the port or passes through shallow sea areas and does not need hydrofoil anti-rolling, the hydrofoil structure 6 will rotate to a horizontal position or above, and the horizontal hydrofoil will leave the water surface and enter an idle state out of water.

[0040] The device drives the worm to rotate through the motor, and drives the turbine to drive the rotating shaft to realize the swing angle of the anti-sway device. Since the worm gear has a self-locking function, the mechanism can stop at any position.

Claims

1. A method for operating a hydrofoil device for stern roll reduction of a hull, characterized in that: The device comprises a hull (5) and a hydrofoil mechanism (6), wherein the tail of the hull (5) is connected to the hydrofoil mechanism (6) via a hydrofoil mounting seat (4) and a hydrofoil rotating mechanism (3); A reduction motor (8) is arranged on a hydrofoil mounting seat (4) fixed at the rear of the hull (5), and the reduction motor (8) drives a worm (9); the reduction motor (8) is arranged in a hydrofoil rotating mechanism (3), and the hydrofoil rotating mechanism (3) adopts a rotating shaft (11) passing through two ends of a sleeve (7) and respectively fixed on an end plate (12), the sleeve (7) is fixed on the hydrofoil mounting seat (4), and a worm gear (10) is arranged in the middle of the rotating shaft (11), and the worm gear (10) meshes with the worm gear (9) to drive the end plate (12) to rotate; The end plates (12) on both sides are respectively fixedly connected to the vertical hydrofoil (2) in the hydrofoil mechanism (6); the two horizontal hydrofoils (1) in the hydrofoil mechanism (6) form a V-shaped structure; the angle between the vertical hydrofoil (2) and the horizontal hydrofoil (1) is 80 degrees; the water-facing side of the horizontal hydrofoil (1) is a flat wing oblique edge (1b); the water-receiving side of the horizontal hydrofoil (1) is a flat wing straight edge (1a); and the angle between the flat wing oblique edge (1b) and the flat wing straight edge (1a) is 15 degrees; The device has three working states: passive anti-roll state, emergency braking state and water-out idle state: a. Passive anti-roll state: the reduction motor (8) drives the worm (9) to rotate in the forward direction, driving the worm wheel (10) and the rotating shaft (11) to rotate clockwise, so that the vertical hydrofoils (2) fixed to the end plates (12) on both sides of the rotating shaft (11) are in a vertical position, thereby achieving a passive anti-roll state; the hydrofoil rotating mechanism controls the vertical hydrofoil to be in a vertical position, and the horizontal hydrofoil (1) will generate an angle of attack relative to the incoming flow direction as the ship pitches, thereby generating a force that hinders the ship's pitching motion, thereby achieving passive anti-roll state; b. Out-of-water idle state: the reduction motor (8) drives the worm (9) to rotate in the opposite direction, thereby driving the worm wheel (10) and the rotating shaft (11) to rotate counterclockwise, thereby causing the vertical hydrofoils (2) fixed to the end plates (12) on both sides of the rotating shaft (11) to rotate counterclockwise; when the vertical hydrofoils (2) rotate to a horizontal position or above, the horizontal hydrofoils (1) leave the water surface and enter the out-of-water idle state; c. Emergency braking state: When entering the emergency braking state from the passive anti-roll state, the reduction motor (8) drives the worm (9) to rotate in the opposite direction, driving the worm wheel (10) and the rotating shaft (11) to rotate counterclockwise, and the vertical hydrofoil (2) rotates around the rotating shaft (11) at an appropriate angle so that the tail of the horizontal hydrofoil (1) approaches the water surface; at this time, the horizontal hydrofoil (1) acts on the water surface to generate fluid resistance to achieve emergency braking; Alternatively, when entering the emergency braking state from the idle state out of water, the reduction motor (8) drives the worm (9) to rotate in the forward direction, driving the worm wheel (10) and the rotating shaft (11) to rotate clockwise, and the vertical hydrofoil (2) rotates around the rotating shaft (11) to an appropriate angle so that the tail of the horizontal hydrofoil (1) approaches the water surface; at this time, the horizontal hydrofoil (1) acts on the water surface to generate fluid resistance to achieve emergency braking.

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