Energy-saving type air duct device for ship and using method of energy-saving type air duct device

Abstract

The invention discloses an energy-saving air duct device for a ship and a using method thereof.The energy-saving air duct device comprises a duct body part and a rotating shaft arranged in the duct body part, the duct body part comprises a fixed-section duct body unit and a plurality of variable-section duct body units arranged above the fixed-section duct body unit, and each variable-section duct body unit is defined by four arc-shaped plates; the adjacent arc-shaped plates are rotationally connected; and a variable cross-section cylinder unit driving mechanism is arranged between the rotating shaft and the variable cross-section cylinder unit. When the wind direction is the same as the sailing direction of the ship, by changing the shape of the cross section of each variable-cross-section cylinder unit, the cross section of each variable-cross-section cylinder unit is in an ellipse-like shape and has the maximum projection area in one direction, the angle of the whole cylinder part is adjusted through the rotating shaft, and the maximum projection area faces the windward direction. Therefore, the variable cross-section cylinder unit has the maximum wind catching area in the windward direction, and the maximum wind catching area bears wind pressure so as to provide larger boosting force for the ship.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship energy-saving equipment, in particular to an energy-saving wind cylinder device for a ship and a use method thereof. BACKGROUND

[0002] In the existing ship, especially the ocean-going ship, in order to save fuel consumption, some energy-saving equipment capable of providing auxiliary power for the ship is usually installed on the ship.

[0003] Among them, the rotating cylinder wind sail is a new type of wind sail energy-saving device, and the core component of the device is a rotatable cylinder, which is installed on the deck of the ship and vertically placed; the working principle of the rotating cylinder wind sail is based on the Magnus effect; when the ship encounters a transverse wind (the wind direction is perpendicular to the ship form direction) during the sailing process, the transverse airflow changes the velocity field of the fluid around the rotating cylinder due to the existence of viscous force; according to Bernoulli's principle, the change of airflow velocity will cause the change of pressure field in the flow field, and the greater the flow velocity, the smaller the pressure; the airflow velocity difference on both sides of the cylinder will cause a pressure difference on both sides of the cylinder, and the pressure difference will form a boost force along the sailing direction on the ship, thereby providing auxiliary power for the ship, reducing the consumption of fuel, and achieving energy-saving effect.

[0004] However, the existing rotating cylinder wind sail can only generate a lateral force perpendicular to the wind direction, which makes the rotating working mode of the rotating cylinder wind sail unable to provide a boost force in the forward direction of the ship when the wind direction is the same as the sailing direction of the ship. When the wind direction is the same as the sailing direction of the ship, although the wind force in the sailing direction of the ship will also generate a certain thrust on the rotating cylinder in the static state, the boost effect on the ship is not obvious due to the small wind receiving area of the rotating cylinder on the windward surface, and the energy-saving effect is poor. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art, and to provide an energy-saving wind cylinder device for a ship and a use method thereof.

[0006] The purpose of the present application is achieved by the following technical scheme: an energy-saving wind cylinder device for a ship, comprising a cylinder part and a rotating shaft arranged in the cylinder part, the cylinder part comprising a fixed cross-section cylinder unit, a plurality of variable cross-section cylinder units arranged above the fixed cross-section cylinder unit, the variable cross-section cylinder unit being enclosed by four arc-shaped plates and being rotatably connected between adjacent arc-shaped plates; a variable cross-section cylinder unit driving mechanism is arranged between the rotating shaft and the variable cross-section cylinder unit, and the variable cross-section driving mechanism changes the cross-sectional shape of the variable cross-section cylinder unit to switch the energy-saving wind cylinder device between the rotating cylinder working mode and the wind sail working mode.

[0007] As preferred, the cross section of the variable cross section cylinder unit is circular when the energy-saving wind cylinder device is in the rotating cylinder working mode; the variable cross section cylinder unit has a maximum wind catching area in the windward direction when the energy-saving wind cylinder device is in the sail working mode, and the wind pressure is borne through the maximum wind catching area to provide boost force for the ship.

[0008] As preferred, the adjacent two circular arc plates are rotationally connected through a connecting shaft; the variable cross section driving mechanism comprises a variable cross section driver arranged between the connecting shaft and the rotating shaft, and the connecting shaft is driven to move along the radial direction of the rotating shaft through the variable cross section driver.

[0009] As preferred, the variable cross section driver is a multi-section electric push rod.

[0010] As preferred, one side of the circular arc plate is provided with a first rotational connecting piece, the other side of the circular arc plate is provided with a second rotational connecting piece, and the first rotational connecting piece and the second rotational connecting piece are both provided with shaft holes; the first rotational connecting piece on one of the adjacent two circular arc plates is connected with the second rotational connecting piece on the other circular arc plate through a rotating shaft.

[0011] As preferred, an angle locking mechanism is arranged between the adjacent two circular arc plates, the angle locking mechanism comprises a first sliding fitting piece and a second sliding fitting piece, and the first sliding fitting piece and the second sliding fitting piece are respectively arranged on the adjacent two circular arc plates; the second sliding fitting piece is in the shape of a circular arc, and the first sliding fitting piece is provided with a circular arc sliding groove matched with the second sliding fitting piece; the first sliding fitting piece is provided with a locking execution component, and the locking execution component is located at one side of the circular arc sliding groove; the locking execution component is composed of a first material layer and a second material layer, the first material layer is located at one side of the second material layer close to the circular arc sliding groove; the thermal expansion coefficient of the first material layer is greater than that of the second material layer; the locking execution component is provided with a heat conducting component, and a heating wire is wound on the heat conducting component; when the energy-saving wind cylinder device is in the rotating cylinder working mode, the second sliding fitting piece extends into the circular arc sliding groove of the first sliding fitting piece, and the locking execution component compresses the second sliding fitting piece to make the angle locking mechanism in a locked state.

[0012] As preferred, the fixed cross section cylinder unit and the rotating shaft are connected through a support column.

[0013] As preferred, the rotating shaft is a hollow shaft, a hollow area for passing a cable is arranged in the rotating shaft, and a cable hole is arranged on the rotating shaft; the lower end of the rotating shaft is connected with the driving motor.

[0014] As preferred, the lower end of the rotating shaft is provided with a first pulley, the driving motor is provided with a second pulley, and the first pulley and the second pulley are connected through a transmission belt.

[0015] The application relates to a method for using an energy-saving wind cylinder device for a ship, and the specific method is as follows: When the wind direction is perpendicular to the ship sailing direction, the energy-saving wind cylinder device is switched to the rotating cylinder working mode, the section shape of the variable-section cylinder unit is circular through the variable-section driving mechanism, the cylinder part is rotated through the rotating shaft, when the wind direction is consistent with the ship sailing direction, the section shape of the variable-section cylinder unit is changed through the variable-section driving mechanism so that the energy-saving wind cylinder device is in the wind sail working mode, and the angle of the variable-section cylinder unit is adjusted so that the variable-section cylinder unit has the maximum wind catching area in the windward direction.

[0016] The application has the beneficial effects that when the transverse wind perpendicular to the ship sailing direction is received, the energy-saving wind cylinder device is switched to the rotating cylinder working mode, the section shape of the variable-section cylinder unit is circular at the moment, the fixed-section cylinder unit and the variable-section cylinder unit are synchronously rotated at a certain speed, the boost force along the ship sailing direction is generated by utilizing the Magnus effect and the Bernoulli principle, thereby saving the ship fuel; when the wind direction is consistent with the ship sailing direction, the energy-saving wind cylinder device is switched to the wind sail working mode by changing the section shape of the variable-section cylinder unit, the section of the variable-section cylinder unit is in the elliptical shape after the section shape of the variable-section cylinder unit is changed, so that the variable-section cylinder unit has the maximum projection area in one direction, the angle of the whole cylinder part is adjusted through the rotating shaft and the maximum projection area is oriented to the windward direction, so that the variable-section cylinder unit has the maximum wind catching area in the windward direction, the wind pressure is borne through the maximum wind catching area, thereby providing the larger boost force for the ship. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of the application.

[0018] Figure 2 The figure is a sectional view of the application.

[0019] Figure 3 The figure is a structural schematic diagram of the variable-section cylinder unit.

[0020] Figure 4 The figure is a structural schematic diagram of the variable-section driving mechanism.

[0021] Figure 5 The figure is a structural schematic diagram of the circular arc plate.

[0022] Figure 6 The figure is a front view of the circular arc plate.

[0023] Figure 7 The figure is Figure 6 The figure is a sectional view in the A-A direction.

[0024] Figure 8 The figure is Figure 7 The figure is an enlarged view of the B part.

[0025] Figure 9 Fig. 2 is a schematic diagram of the present application in the wind turbine mode. Figure 10 Fig. 3 is a schematic diagram of the present application in the wind turbine mode.

[0026] Figure 11 Fig. 4 is a schematic diagram of the present application in the rotary drum mode.

[0027] Figure 12 Fig. 5 is a schematic diagram of the present application in the wind turbine mode.

[0028] In the figure: 1, fixed cross-section cylinder unit, 2, variable cross-section cylinder unit, 3, rotating base, 4, mounting base, 5, bearing, 6, rotating shaft, 6-1, cable hole, 7, first pulley, 8, driving motor, 9, second pulley, 10, transmission belt, 11, ship deck, 12, support column, 13, circular arc plate, 13-1, first rotating connecting piece, 13-2, second rotating connecting piece, 13-3, first sliding fitting piece, 13-4, second sliding fitting piece, 13-5, locking execution part, 13-5a, first material layer, 13-5b, second material layer, 13-6, heat conducting part, 13-7, electric heating wire, 14, variable cross-section driver, 15, connecting shaft. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0030] Those skilled in the art should understand that in the disclosure of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the present application.

[0031] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0032] AsFigures 1 to 12 As shown in the drawings, an energy-saving wind cylinder device for a ship comprises a cylinder part and a rotating shaft 6 arranged in the cylinder part, the cylinder part comprises a fixed cross-section cylinder unit 1, a plurality of variable cross-section cylinder units 2 arranged above the fixed cross-section cylinder unit 1, the variable cross-section cylinder unit 2 is enclosed by four arc-shaped plates, and the adjacent arc-shaped plates are rotationally connected; a variable cross-section driving mechanism is arranged between the rotating shaft 6 and the variable cross-section cylinder unit 2, and the variable cross-section driving mechanism changes the cross-sectional shape of the variable cross-section cylinder unit 2 to switch the energy-saving wind cylinder device between a rotating cylinder working mode and a sail working mode.

[0033] When the energy-saving wind cylinder device is in the rotating cylinder working mode, the variable cross-section cylinder unit 2 is circular; when the energy-saving wind cylinder device is in the sail working mode, the variable cross-section cylinder unit 2 has a maximum wind catching area in the windward direction, and the wind pressure is borne through the maximum wind catching area to provide a boost force for the ship.

[0034] In the present application, when a transverse wind perpendicular to the ship sailing direction is received, the energy-saving wind cylinder device switches to the rotating cylinder working mode, at this time, the cross-sectional shape of the variable cross-section cylinder unit 2 is circular; and the fixed cross-section cylinder unit 1 and the variable cross-section cylinder unit 2 rotate synchronously at a certain speed, a boost force along the ship sailing direction is generated by utilizing the Magnus effect and the Bernoulli principle, thereby saving the fuel of the ship, as shown in the drawings. Figure 11

[0035] When the wind direction is the same as the ship sailing direction, the energy-saving wind cylinder device is switched to the sail working mode by changing the cross-sectional shape of the variable cross-section cylinder unit 2, after the cross-sectional shape of the variable cross-section cylinder unit 2 is changed, the cross section of the variable cross-section cylinder unit 2 is in an elliptical shape, and the shape is more flat (more close to a flat plate), so that it has a maximum projection area in one direction, the angle of the entire cylinder part is adjusted by the rotating shaft 6, and the maximum projection area is directed to the windward direction, so that the variable cross-section cylinder unit 2 has a maximum wind catching area in the windward direction, and the wind pressure is borne through the maximum wind catching area to provide a greater boost force for the ship. Compared with the traditional rotating cylinder sail, the present application can capture more wind energy by the variable cross-section mode when the wind direction is the same as the ship sailing direction, and can more fully utilize the wind energy, thereby improving the auxiliary boost force, saving fuel consumption, reducing the emission of pollutants such as carbon dioxide, and improving the energy-saving effect of the ship.

[0036] The present application can flexibly switch the working mode according to the change of the wind direction, whether it is a transverse wind or a wind in the same direction as the sailing direction, the wind energy can be obtained through the corresponding working mode to provide a propelling force for the ship, the applicable wind direction range of the wind cylinder device is expanded, and the sailing performance and energy-saving effect of the ship under different weather conditions are improved.

[0037] ​The two adjacent circular arc plates 13 are rotationally connected through the connecting shaft 15.

[0038] A group of variable cross-section drivers 14 are arranged in each of the four directions of the rotating shaft 6, and the interval angle between the adjacent two groups of variable cross-section drivers 14 is 90 degrees.

[0039] The variable cross-section cylinder unit 2 is surrounded by four arc-shaped plates, and the edges of the adjacent arc-shaped plates are connected through the connecting shaft 15, thereby forming a hinged connection structure, so that the adjacent arc-shaped plates can be flexibly rotated, thereby laying the foundation for the variable cross-section cylinder unit 2 to change the cross-sectional shape.

[0040] When the push rod of the variable cross-section driver 14 extends to the radial outside of the rotating shaft 6, it will push the connecting shaft 15 to move away from the rotating shaft 6; since the connecting shaft 15 is rotationally connected with the arc-shaped plate, the outward movement of the connecting shaft 15 will push and pull the edge of the arc-shaped plate, forcing the arc-shaped plate to rotate with the adjacent connecting shaft 15 as the fulcrum.

[0041] When the push rod of the variable cross-section driver 14 retracts to the radial inside of the rotating shaft 6, it will pull the connecting shaft 15 to move close to the rotating shaft 6; the inward movement of the connecting shaft 15 will pull the edge of the arc-shaped plate, forcing the arc-shaped plate to rotate inward with the adjacent connecting shaft 15 as the fulcrum.

[0042] Through the cooperative action of the four groups of variable cross-section drivers 14, the cross-sectional shape of the variable cross-section cylinder unit 2 is switched between a circular shape and an elliptical shape, thereby realizing the switching between the rotating drum working mode and the sail working mode. The switching between the rotating drum working mode and the sail working mode is as shown in Figure 9 .

[0043] When in the sail working mode, the ratio of the maximum width to the minimum width of the cross section of the variable cross-section cylinder unit 2 is 2-2.4.

[0044] In this embodiment, the variable cross-section driver 14 is a multi-section electric push rod.

[0045] One side of the circular arc plate 13 is provided with a first rotation connecting piece 13-1, and the other side of the circular arc plate 13 is provided with a second rotation connecting piece 13-2, and the first rotation connecting piece 13-1 and the second rotation connecting piece 13-2 are both provided with shaft holes; the first rotation connecting piece 13-1 on one of the two adjacent circular arc plates 13 is connected with the second rotation connecting piece 13-2 on the other circular arc plate 13 through the rotating shaft 6; and the connecting shaft 15 is inserted into the shaft holes of the first rotation connecting piece 13-1 and the second rotation connecting piece 13-2.

[0046] Further, an angle locking mechanism is arranged between the two adjacent circular arc plates 13, which comprises a first sliding fitting part 13-3 and a second sliding fitting part 13-4, and the first sliding fitting part 13-3 and the second sliding fitting part 13-4 are arranged on the two adjacent circular arc plates 13 respectively; the second sliding fitting part 13-4 is in the shape of a circular arc, and the first sliding fitting part 13-3 is provided with a circular arc sliding groove matched with the second sliding fitting part 13-4; the first sliding fitting part 13-3 is provided with a locking execution part 13-5, which is located on one side of the circular arc sliding groove; the locking execution part 13-5 is composed of a first material layer 13-5a and a second material layer 13-5b, and the first material layer 13-5a is located on the side of the second material layer 13-5b close to the circular arc sliding groove; the thermal expansion coefficient of the first material layer 13-5a is greater than that of the second material layer 13-5b; the locking execution part 13-5 is provided with a heat conducting part 13-6, and a rear electric heating wire 13-7 is wound on the heat conducting part 13-6; when the energy-saving wind cylinder device is in the rotating cylinder working mode, the second sliding fitting part 13-4 extends into the circular arc sliding groove of the first sliding fitting part 13-3, and the locking execution part 13-5 compresses the second sliding fitting part 13-4 to make the angle locking mechanism in a locked state.

[0047] When the energy-saving wind cylinder device is in the rotating cylinder working mode, the second sliding fitting part 13-4 extends into the circular arc sliding groove of the first sliding fitting part 13-3, and the locking execution part 13-5 compresses the second sliding fitting part 13-4 at room temperature to make the angle locking mechanism in a locked state, and through the locking effect of the angle locking mechanism, the relative rotation between the adjacent circular arc plates 13 is prevented, the circular cross-sectional shape of the variable cross-section cylinder unit 2 in the rotating cylinder working mode is ensured to be stable, so that the normal work of the variable cross-section cylinder unit 2 based on the Magnus effect is ensured, and stable auxiliary power is provided for the ship. The compression effect of the locking execution part 13-5 can fill the small gap between the second sliding fitting part 13-4 and the circular arc sliding groove, avoid the loosening of the parts caused by vibration during the navigation of the ship, and ensure that the variable cross-section cylinder unit 2 stably maintains the circular structure.

[0048] When the energy-saving wind cylinder device needs to switch from the rotating drum working mode to the sail working mode, the relative rotation between the arc plates 13 is required; at this time, the electric heating wire 13-7 is powered on and heats the heat conducting component 13-6, and after the heat conducting component 13-6 is heated, the heat is transmitted to the locking execution component 13-5, so that the temperature of the locking execution component 13-5 rises; with the rise of the temperature, the first material layer 13-5a (close to the side of the arc sliding groove) and the second material layer 13-5b (far from the side of the sliding groove) are asymmetrically deformed due to the difference in the thermal expansion coefficient; since the thermal expansion coefficient of the first material layer 13-5a is much larger than that of the second material layer 13-5b, the thermal expansion amount of the first material layer 13-5a will be significantly larger than that of the second material layer 13-5b under the same temperature rise, causing the locking execution component 13-5 to bend as a whole in the direction away from the arc sliding groove, so that the extrusion force of the locking execution component 13-5 on the second sliding fitting 13-4 disappears, so that the angle locking mechanism is in an unlocked state, and the second sliding fitting 13-4 can freely slide in the arc sliding groove, and the relative rotation of adjacent arc plates 13 is no longer constrained by the locking force, and the adjacent arc plates 13 can smoothly rotate under the action of the variable cross-section driving mechanism, so as to facilitate adjustment to the cross-section shape required by the corresponding working mode.

[0049] When switching to the rotating drum working mode, the power supply of the electric heating wire 13-7 is cut off, and after the electric heating wire 13-7 stops heating, the temperature of the locking execution component 13-5 drops to room temperature, and with the drop of the temperature, the locking execution component 13-5 gradually returns to the initial state (i.e., the locking execution component 13-5 bends as a whole in the direction close to the arc sliding groove), so that the locking execution component 13-5 presses the second sliding fitting 13-4 tightly, and the angle locking mechanism is in a locked state.

[0050] In addition, the design of the angle locking mechanism avoids the rotation or displacement of the arc plates 13 under unintended conditions, reducing the wear and damage of the components caused by loosening or shaking. For example, during the navigation of the ship, various wind and wave conditions may be encountered, causing jolting and vibration. If there is no angle locking mechanism, the connection between the arc plates 13 may gradually loosen, affecting the performance and service life of the wind cylinder device; the angle locking mechanism can effectively prevent the above-mentioned situation from occurring, improve the reliability and durability of the entire device, and reduce the maintenance cost and frequency.

[0051] In this embodiment, the heat conducting component 13-6 is made of copper alloy.

[0052] The fixed cross-section cylinder unit 1 is connected to the rotating shaft 6 through the support column 12. The rigid connection between the fixed cross-section cylinder unit 1 and the internal rotating shaft 6 is realized through the support column 12; when the rotating shaft 6 rotates, it will drive the fixed cross-section cylinder unit 1 to rotate synchronously.

[0053] The rotating shaft 6 is a hollow shaft, a hollow area for passing a cable is arranged in the rotating shaft 6, and a cable hole 6-1 is arranged on the rotating shaft 6; the lower end of the rotating shaft 6 is connected with the driving motor 8. A cable hole 6-1 is further arranged on the rotating shaft 6. One end of the cable for supplying power to the electric heating wire 13-7 is connected with the electric heating wire 13-7, and the other end of the cable passes into the hollow area in the rotating shaft 6 through the cable hole 6-1, then passes out of the lower end of the rotating shaft 6 and is connected with the power supply device on the ship, so that the electric heating wire 13-7 is supplied with power through the power supply device. In order to avoid the problem of rotating winding of the cable in the process of rotating the rotating shaft 6, a slip ring can be arranged at the lower end of the rotating shaft 6. The slip ring is a component for realizing current and signal transmission between a rotating component and a fixed component, and the core structure thereof is a rotating ring (fixed at the lower end of the rotating shaft 6 and synchronously rotating with the rotating shaft 6) and a fixed brush (connected with the power supply device on the ship through a cable and kept stationary). When the rotating shaft 6 drives the rotating ring to rotate, the fixed brush always keeps in contact with the rotating ring, and current can be stably transmitted through the path of “fixed brush→rotating ring→cable in the hollow area of the rotating shaft→electric heating wire”, so that the problem of cable winding is completely avoided.

[0054] The lower end of the rotating shaft 6 is provided with a first pulley 7, the driving motor 8 is provided with a second pulley 9, and the first pulley 7 and the second pulley 9 are connected through a transmission belt 10. The second pulley 9 is driven to rotate by the driving motor 8, and the first pulley 7 and the rotating shaft 6 are driven to rotate by the second pulley 9 through the transmission belt 10.

[0055] The lower end of the fixed cross-section cylinder unit 1 is provided with a rotating base 3, the rotating base 3 is arranged on a mounting base 4, the mounting base 4 is located on the deck of the ship, and a bearing 5 is arranged between the rotating base 3 and the mounting base 4.

[0056] A use method of the energy-saving wind cylinder device for the ship is as follows: When the wind direction is perpendicular to the sailing direction of the ship, the energy-saving wind cylinder device is switched to the rotating cylinder working mode, the cross-sectional shape of the variable cross-section cylinder unit 2 is circular through the variable cross-section driving mechanism, the cylinder part is rotated through the rotating shaft 6, and when the wind direction is consistent with the sailing direction of the ship, the cross-sectional shape of the variable cross-section cylinder unit 2 is changed through the variable cross-section driving mechanism so that the energy-saving wind cylinder device is in the sail working mode, and the angle of the variable cross-section cylinder unit 2 is adjusted so that the variable cross-section cylinder unit 2 has the maximum wind catching area in the windward direction.

[0057] The present application is not limited to the above-mentioned best mode, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any change in shape or structure, any technical solution with the same or similar to the present application falls within the protection scope of the present application.

Claims

1. An energy-saving ventilation duct device for ships, characterized in that, The device includes a cylindrical body and a rotating shaft located within the cylindrical body. The cylindrical body includes a fixed cross-section cylindrical unit and several variable cross-section cylindrical units located above the fixed cross-section cylindrical units. Each variable cross-section cylindrical unit is formed by four arc-shaped plates, which are rotatably connected to adjacent arc-shaped plates. A variable cross-section drive mechanism is provided between the rotating shaft and the variable cross-section cylindrical units. The variable cross-section drive mechanism changes the cross-sectional shape of the variable cross-section cylindrical units to switch the energy-saving wind tunnel device between a rotating cylinder working mode and a sail working mode.

2. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, When the energy-saving wind tunnel device is in the rotating drum working mode, the cross-sectional shape of the variable cross-section cylinder unit is circular; when the energy-saving wind tunnel device is in the sail working mode, the variable cross-section cylinder unit has the maximum wind-catching area in the windward direction, and the wind pressure is borne by the maximum wind-catching area to provide thrust for the ship.

3. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, The two adjacent arc plates are rotatably connected by a connecting shaft; the variable cross-section drive mechanism includes a variable cross-section driver disposed between the connecting shaft and the rotating shaft, which drives the connecting shaft to move radially along the rotating shaft.

4. The energy-saving ventilation duct device for ships according to claim 3, characterized in that, The variable cross-section actuator is a multi-segment electric actuator.

5. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, A first rotating connector is provided on one side of the arc plate, and a second rotating connector is provided on the other side of the arc plate. Both the first and second rotating connectors are provided with shaft holes. In two adjacent arc plates, the first rotating connector on one arc plate is connected to the second rotating connector on the other arc plate by a rotating shaft.

6. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, An angle locking mechanism is provided between two adjacent arc plates. The angle locking mechanism includes a first sliding engagement component and a second sliding engagement component, which are respectively disposed on the two adjacent arc plates. The second sliding engagement component is arc-shaped, and the first sliding engagement component has an arc groove adapted to the second sliding engagement component. A locking actuation component is provided on the first sliding engagement component, located on one side of the arc groove. The locking actuation component is composed of a first material layer and a second material layer, with the first material layer located on the side of the second material layer closer to the arc groove. The coefficient of thermal expansion of the first material layer is greater than that of the second material layer. A heat-conducting component is provided on the locking actuation component, and a heating wire is wound on the heat-conducting component. When the energy-saving duct device is in the rotating duct working mode, the second sliding fit part extends into the arc groove of the first sliding fit part, and the locking actuator presses the second sliding fit part to make the angle locking mechanism in a locked state.

7. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, This includes a fixed-section cylindrical unit connected to the rotating shaft via a support column.

8. The energy-saving ventilation duct device for ships according to claim 1, characterized in that, The shaft is a hollow shaft with a hollow area inside for the cable to pass through, and a cable hole is provided on the shaft; the lower end of the shaft is connected to the drive motor.

9. The energy-saving ventilation duct device for ships according to claim 8, characterized in that, The lower end of the rotating shaft is provided with a first pulley, and the drive motor is provided with a second pulley. The first pulley and the second pulley are connected by a transmission belt.

10. A method of using an energy-saving ventilation duct device for ships, based on the energy-saving ventilation duct device for ships according to claim 1, characterized in that, The specific method is as follows: When the wind direction is perpendicular to the ship's sailing direction, the energy-saving wind duct device switches to the rotating drum working mode. The cross-sectional shape of the variable cross-section cylinder unit is made circular through the variable cross-section drive mechanism. The cylinder part is rotated through the rotating shaft. When the wind direction is in the same direction as the ship's sailing direction, the cross-sectional shape of the variable cross-section cylinder unit is changed through the variable cross-section drive mechanism so that the energy-saving wind duct device is in the sail working mode. The angle of the variable cross-section cylinder unit is adjusted so that the variable cross-section cylinder unit has the maximum wind-catching area in the windward direction.

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