Ship rotating air duct equipment and control method thereof

Abstract

The invention discloses ship rotating air duct equipment and a control method thereof.The ship rotating air duct equipment comprises a rotating shaft, a first rotating drum part and a second rotating drum part are arranged outside the rotating shaft, the second rotating drum part comprises two arc-shaped fixed outer plate units, and foldable outer plate units are arranged between the two sides of the two fixed outer plate units correspondingly; the foldable outer plate unit is hinged to the fixed outer plate unit; a first driver is arranged between the fixed outer plate unit and the rotating shaft, and a second driver is arranged between the foldable outer plate unit and the rotating shaft; the second driver drives the foldable outer plate unit to be switched between the folded state and the unfolded state. According to the invention, in a normal wind speed environment, the second rotary drum part is switched to a circular cross section state; in the strong wind environment, the state of the cross section of the second rotary drum part is switched to be in a jujube pit shape, the cross wind acting force borne by the rotary drum parts is reduced, and the stability and safety of ship navigation are improved.

Description

Technical Field

[0001] This invention relates to the field of marine energy-saving equipment technology, and in particular to marine rotating ventilation duct equipment and its control method. Background Technology

[0002] In modern shipbuilding, especially for ocean-going vessels, auxiliary power energy-saving devices are commonly used to reduce fuel consumption in order to achieve energy conservation and emission reduction goals. The rotary sail, as a new type of sail energy-saving device, has a core component that is a cylindrical structure that can rotate around a vertical axis, vertically mounted on the ship's deck. The working principle of the rotary sail is based on the Magnus effect: when a ship encounters a crosswind (perpendicular to the ship's direction of travel), the crosswind flows over the rotating cylinder surface. Due to fluid viscosity, the velocity distribution of the flow field around the cylinder changes. According to Bernoulli's principle, changes in fluid velocity lead to changes in the pressure field, with higher velocity resulting in lower pressure. The pressure difference created by the airflow velocity difference on both sides of the cylinder is converted into a thrust along the ship's direction of travel, thus providing auxiliary propulsion power and achieving the goal of reducing fuel consumption and improving energy efficiency. However, the core of existing rotary sail devices is a towering cylindrical structure (usually tens of meters high). When a ship encounters strong crosswinds, this towering cylindrical structure will bear significant lateral aerodynamic forces, thereby generating a large overturning moment on the hull. If this overturning moment exceeds the ship's stability limit, it will seriously threaten the stability and safety of the ship's navigation. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a ship rotating wind tunnel device and its control method.

[0004] The objective of this invention is achieved through the following technical solution: a ship-mounted rotating wind tunnel device, comprising a rotating shaft, a first rotating cylinder component and a second rotating cylinder component disposed outside the rotating shaft, the second rotating cylinder component comprising two fixed outer plate units in an arc shape, and a foldable outer plate unit disposed between the two sides of the two fixed outer plate units; the foldable outer plate units are hinged to the fixed outer plate units; a first driver is disposed between the fixed outer plate units and the rotating shaft, and a second driver is disposed between the foldable outer plate units and the rotating shaft; the first driver drives the fixed outer plate units to move radially along the rotating shaft to change the distance between the two fixed outer plate units; the second driver drives the foldable outer plate units to switch between a folded state and an unfolded state.

[0005] Preferably, when the second rotating drum component is in the working state, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating drum component is circular; when the second rotating drum component is in the windproof state, the foldable outer plate unit switches to the folded state so that the cross-section of the second rotating drum component is shaped like a date pit.

[0006] Preferably, the foldable outer panel unit includes two arc-shaped foldable panel assemblies connected by a connector, and the connector is hinged to the arc-shaped foldable panel assemblies; the arc-shaped foldable panel assemblies are hinged to adjacent fixed outer panel units; one end of the second driver is connected to the connector, and the other end of the second driver is connected to a rotating shaft; the second driver drives the connector to move radially along the rotating shaft to switch the state of the foldable outer panel unit.

[0007] Preferably, the arc-shaped folding panel assembly includes a frame component, a fixed shaft, and an arc-shaped panel. The frame component includes two fixed beams, and the fixed shaft is disposed between the ends of the two fixed beams. The two sides of the arc-shaped panel are respectively connected to the fixed shaft. The frame component is provided with a switching mechanism for changing the protrusion direction of the arc-shaped panel. When the foldable outer panel unit is in an unfolded state, the arc-shaped panel switches to a first protrusion state. When the foldable outer panel unit is in a folded state, the arc-shaped panel switches to a second protrusion state.

[0008] Preferably, the switching mechanism includes a bracket mounted on a fixed beam, a motor mounted on the bracket, and a lead screw connected to the motor; a slider slidably mounted on the bracket, a lead screw nut mounted on the slider, and the lead screw nut connected to the lead screw; a push block mounted on the slider; a longitudinal rib plate located in the middle of the arc-shaped plate, with a groove on the longitudinal rib plate, and the push block extending into the groove; the push block is moved by the motor, thereby causing the longitudinal rib plate located in the middle of the arc-shaped plate to move, thereby changing the convex direction of the arc-shaped plate.

[0009] Preferably, the arc-shaped plate is a circular arc-shaped plate structure, and the arc-shaped plate unit is made of spring steel.

[0010] Preferably, a second connecting sleeve is provided on each side of the arc-shaped plate, and the second connecting sleeve is sleeved on the fixed shaft; a first connecting sleeve is provided on the side of the fixed outer plate unit, and the second connecting sleeve is sleeved on the fixed shaft.

[0011] Preferably, the inner side of the fixed outer plate unit is provided with reinforcing ribs.

[0012] Preferably, the first rotating drum component is connected to the rotating shaft via a connecting column.

[0013] The control method for ship's rotating ventilation duct equipment is as follows: During navigation, when the wind speed is less than the wind speed threshold, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating cylinder component is circular, and the rotating shaft drives the first and second rotating cylinder components to rotate synchronously. When the wind speed exceeds the wind speed threshold, when the second rotating cylinder component is in a sheltered state, the foldable outer plate unit switches to the folded state so that the cross-section of the second rotating cylinder component is shaped like a date pit, and the angle of the second rotating cylinder component is adjusted by the rotating shaft so that the projected area of ​​the second rotating cylinder component in the wind direction is minimized.

[0014] The beneficial effects of this invention are as follows: In normal wind speed environments (i.e., crosswind speed below the wind speed threshold), by switching the second rotating cylinder component to a circular cross-section and rotating it via a shaft, it can achieve a propulsion-boosting energy-saving effect based on the Magnus effect and Bernoulli principle, thereby enhancing the ship's propulsion power. In strong wind environments (crosswind speed below the wind speed threshold), by switching the cross-section of the second rotating cylinder component to a date-shaped form, the crosswind force on the rotating cylinder component is reduced, thereby reducing the overturning moment of the ship's rotating wind tunnel equipment and improving the stability and safety of ship navigation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the second rotating drum component.

[0018] Figure 4 This is a structural schematic diagram of the foldable outer panel unit.

[0019] Figure 5 This is a schematic diagram of the resulting curved folded plate assembly.

[0020] Figure 6 for Figure 5 Enlarged view of section A.

[0021] Figure 7 This is a structural schematic diagram of the connector.

[0022] Figure 8 This is a schematic diagram of the arc-shaped folding plate assembly switching from the first protruding state to the second protruding state.

[0023] Figure 9 This is a structural diagram of a fixed outer panel unit.

[0024] Figure 10 This is a schematic diagram of the second rotating drum component switching from the working state to the windproof state.

[0025] Figure 11This is a schematic diagram showing the state of the second rotating drum component in a strong wind environment after it has switched to the windproof state.

[0026] In the diagram: 1. First rotating drum component, 2. Second rotating drum component, 3. Rotating shaft, 4. Top plate, 5. Fixed outer plate unit, 5-1. Reinforcing rib, 5-2. First connecting sleeve, 6. Arc-shaped folding plate assembly, 6-1. Fixed beam, 6-2. Fixed shaft, 6-3. Arc-shaped plate, 6-4. Second connecting sleeve, 6-5. Longitudinal stiffener, 6-6. Bracket, 6-7. Motor, 6-8. Slide groove, 6-9. Slider, 6-10. Lead screw nut, 6-11. Lead screw, 6-12. Push block, 6-13. Groove, 7. First driver, 8. Second driver, 9. Connector, 9-1. Connecting hole, 10. Connecting column. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] like Figures 1 to 11As shown, the ship's rotating wind tunnel equipment includes a rotating shaft 3, with a first rotating cylinder component 1 and a second rotating cylinder component 2 disposed outside the rotating shaft 3. The second rotating cylinder component 2 includes two fixed outer plate units 5 in the shape of arcs, and foldable outer plate units are respectively disposed between the two sides of the two fixed outer plate units 5. The foldable outer plate units are hinged to the fixed outer plate units 5. A first driver 7 is disposed between the fixed outer plate units 5 and the rotating shaft 3, and a second driver 8 is disposed between the foldable outer plate units and the rotating shaft 3. The first driver 7 drives the fixed outer plate units 5 to move radially along the rotating shaft 3 to change the distance between the two fixed outer plate units 5. The second driver 8 drives the foldable outer plate units to switch between a folded state and an unfolded state.

[0031] The first rotating cylinder component 1 is an integral cylindrical component. The first rotating cylinder component 1 is connected to the rotating shaft 3 through the connecting column 10, and the first rotating cylinder component 1 and the rotating shaft 3 are arranged coaxially.

[0032] Multiple second rotating drum components 2 are provided and arranged sequentially along the axial direction of the rotating shaft 3. The second rotating drum components 2 are located above the first rotating drum component 1.

[0033] The process of the second rotating drum component 2 switching from the working state to the windproof state is as follows: Figure 10 As shown. When the second rotating cylinder component 2 is in the working state, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating cylinder component 2 is circular. When the second rotating cylinder component 2 is in the working state, the outer diameter of the second rotating cylinder component 2 is the same as the outer diameter of the first rotating cylinder component 1, so that the ship's rotating wind duct equipment as a whole has a cylindrical structure with a uniform radius from bottom to top. When the second rotating cylinder component 2 is in the working state, it drives the first rotating cylinder component 1 and the second rotating cylinder component 2 to rotate synchronously through the rotating shaft 3; when the crosswind speed does not exceed the dangerous wind speed (wind speed threshold), the rotation of the first rotating cylinder component 1 and the second rotating cylinder component 2 generates a thrust along the ship's forward direction, thereby achieving the effect of boosting propulsion and saving energy for the ship.

[0034] When the second rotating cylinder component 2 is in a sheltered state, the foldable outer panel unit switches to a folded state so that the cross-section of the second rotating cylinder component 2 is oval-shaped. In the sheltered state, the cross-section of the second rotating cylinder component 2 has a longer width in one direction and a shorter width in the other direction, with the two ends of the longer width direction forming sharp angles. When the crosswind speed exceeds the dangerous wind speed (wind speed threshold), the second rotating cylinder component 2 is switched from the working state to the sheltered state, making the cross-section of the second rotating cylinder component 2 oval-shaped. The angle of the second rotating cylinder component 2 is adjusted by the rotating shaft 3 to minimize the projected area of ​​the second rotating cylinder component 2 in the wind direction (e.g., Figure 11As shown in the figure, the long axis of the jujube-shaped cross-section is parallel to the wind direction; this will effectively reduce the projected area perpendicular to the wind direction, thereby greatly reducing wind resistance; and the jujube-shaped cross-section has a more streamlined shape, allowing the airflow to pass around the second rotating cylinder component 2 more smoothly and with less resistance, reducing separation vortices and turbulence, thereby further reducing the lateral force on the second rotating cylinder component 2, reducing the overturning moment of the entire ship's rotating wind turbine equipment, and improving the safety and stability of ship navigation.

[0035] In this invention, under normal wind speed conditions (i.e., crosswind speed below the wind speed threshold), by switching the second rotating cylinder component 2 to a circular cross-section and rotating it via the rotating shaft 3, it achieves a propulsion-boosting energy-saving effect based on the Magnus effect and Bernoulli principle, thereby enhancing the ship's propulsion power. When facing strong winds (crosswind speed below the wind speed threshold), by switching the cross-section of the second rotating cylinder component 2 to a date-shaped configuration, the crosswind force on the rotating cylinder component is reduced, thereby reducing the overturning moment of the ship's rotating wind tunnel equipment and improving the stability and safety of the ship's navigation.

[0036] Specifically, the foldable outer panel unit includes two arc-shaped foldable panel assemblies 6, which are connected by a connector 9. The connector 9 is hinged to the arc-shaped foldable panel assemblies 6. The arc-shaped foldable panel assemblies 6 are hinged to the adjacent fixed outer panel unit 5. One end of the second driver 8 is connected to the connector 9, and the other end of the second driver 8 is connected to the rotating shaft 3. The second driver 8 drives the connector 9 to move radially along the rotating shaft 3 to switch the state of the foldable outer panel unit.

[0037] The connector 9 has two connecting holes 9-1. The fixed shaft 6-2 on the arc-shaped folding plate assembly 6 passes through the connecting holes 9-1 on the connector 9. The connection between the connector 9 and the arc-shaped folding plate assembly 6 is achieved through the hole-shaft cooperation, thereby realizing the relative rotation between the two arc-shaped folding plate assemblies 6. The state switching of the foldable outer plate unit is realized through the relative rotation between the two arc-shaped folding plate assemblies 6.

[0038] Two arc-shaped folding plate assemblies 6 are connected to the second driver 8 via a connector 9 in the middle of them. One end of the arc-shaped folding plate assembly 6 is connected to the fixed outer plate unit 5, and the other end is connected to the connector 9. The second driver 8 drives the connector 9 to move radially along the rotating shaft 3. Through the radial movement of the connector 9, the two arc-shaped folding plate assemblies 6 are simultaneously rotated around the hinge point of the fixed outer plate unit 5, thereby realizing the unfolding or folding process of the foldable outer plate unit.

[0039] When the foldable outer panel unit is in the unfolded state, the arc-shaped folding plate assembly 6 and the fixed outer panel unit 5 together form a complete circular structure, making the cross-section of the second rotating cylinder component 2 circular. At this time, the arc-shaped folding plate assembly 6 and the center of the arc of the fixed outer panel unit 5 coincide.

[0040] When the foldable outer panel unit switches from the unfolded state to the folded state, the second driver 8 drives the connector 9 to move radially inward toward the rotating shaft 3, causing the arc-shaped folding plate assembly 6 to fold inward and the two arc-shaped folding plate assemblies 6 to overlap; at the same time, the first driver 7 drives the two fixed outer panel units 5 to move closer to each other, so that the two sides of the two fixed outer panel units 5 reach the minimum distance. At this time, the cross-section of the entire second rotating cylinder component 2 is shaped like a date pit.

[0041] In this embodiment, the second actuator 8 is an electric cylinder. The second actuator 8 is arranged radially along the rotating shaft 3. The first actuator is an electric cylinder, and the first actuator is arranged radially along the rotating shaft.

[0042] The arc-shaped folding panel assembly 6 includes a frame component, a fixed shaft 6-2, and an arc-shaped plate 6-3. The frame component includes two fixed beams 6-1, and the fixed shaft 6-2 is located between the ends of the two fixed beams 6-1. The two sides of the arc-shaped plate 6-3 are respectively connected to the fixed shaft 6-2. The frame component is provided with a switching mechanism for changing the protrusion direction of the arc-shaped plate 6-3. When the foldable outer panel unit is in the unfolded state, the arc-shaped plate 6-3 switches to the first protrusion state; when the foldable outer panel unit is in the folded state, the arc-shaped plate 6-3 switches to the second protrusion state.

[0043] The arc-shaped plate 6-3 has an arc-shaped structure. Since both sides of the arc-shaped plate 6-3 are connected to the fixed shaft 6-2, it exhibits a certain curvature under the constraint of the frame components. Applying a pushing force to the middle of the arc-shaped plate 6-3 can change its convex direction. When the switching mechanism applies a force in one direction to the middle of the arc-shaped plate 6-3, it will exhibit a first convex state under that force; when the switching mechanism applies a force in the opposite direction, it will exhibit a second convex state. This switching process is as follows: Figure 8 As shown.

[0044] When the second rotating drum component 2 is in working condition, the arc plate 6-3 needs to cooperate with the fixed outer plate unit 5 to form a complete circular structure. At this time, the arc plate 6-3 is in the first convex state, and the convex direction of the middle part of the arc plate 6-3 faces the outside of the second rotating drum component 2.

[0045] When the second rotating cylinder component 2 needs to switch to the windproof state, the arc-shaped folding plate assembly 6 needs to fold inward. During the folding process, the two arc-shaped folding plate assemblies 6 need to be retracted inward toward the rotating shaft 3 to a stacked state. If the convex direction of the arc-shaped plate 6-3 does not change at this time (i.e., it still maintains the first convex state), the two arc-shaped plate 6-3 folding assemblies will collide and interfere during the folding process due to the outward convex structure of the arc-shaped plate 6-3. As a result, the two arc-shaped plate 6-3 folding assemblies cannot be retracted to a tightly stacked state. Ultimately, the cross-section of the second rotating cylinder component 2 cannot be switched to a perfect oval shape, which is not conducive to reducing the wind resistance of the second rotating cylinder component 2 in strong winds.

[0046] In this invention, to solve this problem, the arc-shaped plate 6-3 adopts a "switchable convex direction" structural design. When the arc-shaped folding plate assembly 6 is folded, the arc-shaped plate 6-3 is switched from the first convex state (outward convex) to the second convex state (inward convex) by the convex direction of the cover plate arc-shaped plate 6-3. This makes the two arc-shaped plates 6-3 form a "concave-opposite" structural state, allowing the arc-shaped folding plate assembly 6 to be folded into a tightly overlapping state, avoiding interference between the two arc-shaped plates 6-3 due to the convex state, and enabling the cross-section of the second rotating cylinder component 2 to achieve a perfect jujube shape. Under this shape, the wind resistance of the second rotating cylinder component 2 in strong winds can be reduced to the greatest extent, improving the stability of ship navigation.

[0047] The curved plate 6-3 is made of a metal material with good elasticity. In this embodiment, the curved plate 6-3 unit is made of spring steel. The use of a metal material (spring steel) with good elasticity in the curved plate 6-3 gives it the characteristic of "growing significantly under external force and stabilizing in its current state after the external force is removed"; when the switching mechanism pushes the middle of the curved plate 6-3, the curved plate 6-3 can elastically bend around the two fixed shafts 6-2, transitioning from the first convex state (outward convex) to the second convex state (inward convex); when the force of the switching mechanism disappears, the curved plate 6-3 can also maintain its current convex shape by relying on the elasticity of the material itself (no additional locking structure required).

[0048] Specifically, the switching mechanism includes a bracket 6-6 mounted on a fixed beam 6-1, a motor 6-7 mounted on the bracket 6-6, and a lead screw 6-11 connected to the motor 6-7; a slider 6-9 slidably mounted on the bracket 6-6, and a lead screw nut 6-10 mounted on the slider 6-9, which is connected to the lead screw 6-11; a push block 6-12 mounted on the slider 6-9; a longitudinal stiffener 6-5 located in the middle of the arc-shaped plate 6-3, and a groove 6-13 located in the longitudinal stiffener 6-5, into which the push block 6-12 extends; the motor 6-7 drives the push block 6-12 to move, thereby causing the longitudinal stiffener 6-5 located in the middle of the arc-shaped plate 6-3 to move and change the convex direction of the arc-shaped plate 6-3.

[0049] The bracket 6-6 is perpendicular to the fixed beam 6-1, and the axis of the bracket 6-6 is consistent with the switching direction of the protrusion of the arc plate 6-3. The bracket 6-6 is provided with a sliding groove 6-8, and the slider 6-9 is connected in the sliding groove 6-8 and can slide along the sliding groove 6-8.

[0050] When the arc-shaped plate 6-3 switches from the first convex state (outward convexity) to the second convex state (inward convexity), the motor 6-7 drives the lead screw 6-11 to rotate in one direction, thereby causing the push block 6-12 to move radially inward toward the rotating shaft 3. The movement of the push block 6-12 will cause the longitudinal stiffener 6-5 in the middle of the arc-shaped plate 6-3 to move radially inward toward the arc-shaped plate 6-3, thus changing the convex direction of the arc-shaped plate 6-3. Conversely, when the arc-shaped plate 6-3 switches from the second convex state (inward convexity) to the first convex state (outward convexity), the motor 6-7 drives the lead screw 6-11 to rotate in the opposite direction, and the push block 6-12 will cause the longitudinal stiffener 6-5 in the middle of the arc-shaped plate 6-3 to move radially outward toward the arc-shaped plate 6-3, thereby changing the convex direction of the arc-shaped plate 6-3.

[0051] A second connecting sleeve 6-4 is provided on each side of the arc-shaped plate 6-3. The second connecting sleeve 6-4 is sleeved on the fixed shaft 6-2. Through the cooperation between the second connecting sleeve 6-4 and the fixed shaft 6-2, a rotatable connection is achieved between the side of the arc-shaped plate 6-3 and the fixed shaft 6-2. A first connecting sleeve 5-2 is provided on the side of the fixed outer plate unit 5, and a second connecting sleeve 6-4 is sleeved on the fixed shaft 6-2. Through the cooperation between the first connecting sleeve 5-2 and the fixed shaft 6-2, a rotatable connection is achieved between the fixed outer plate unit 5 and the arc-shaped folding plate assembly 6.

[0052] A reinforcing rib 5-1 is provided on the inner side of the fixed outer panel unit 5. The reinforcing rib 5-1 is arranged along the transverse direction of the fixed outer panel unit 5, and the fixed outer panel unit 5 is reinforced by the reinforcing rib 5-1 to improve the deformation resistance of the fixed outer panel unit 5.

[0053] The rotating shaft 3 has a hollow structure, and the hollow area inside can be used to lay cables. A circular top plate 4 is provided at the upper end of the rotating shaft 3.

[0054] A control method for a ship's rotating ventilation duct equipment, the specific method is as follows: During navigation, when the wind speed is less than the wind speed threshold, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating cylinder component 2 is circular, and the rotating shaft 3 drives the first rotating cylinder component 1 and the second rotating cylinder component 2 to rotate synchronously. When the wind speed exceeds the wind speed threshold, when the second rotating cylinder component 2 is in a sheltered state, the foldable outer plate unit switches to the folded state so that the cross-section of the second rotating cylinder component 2 is shaped like a date pit, and the angle of the second rotating cylinder component 2 is adjusted by the rotating shaft 3 so that the projected area of ​​the second rotating cylinder component 2 in the wind direction is minimized.

[0055] The wind speed threshold can be set according to the actual conditions of the vessel.

[0056] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A ship's rotating ventilation duct equipment, characterized in that, The device includes a rotating shaft, and a first rotating cylinder component and a second rotating cylinder component are disposed outside the rotating shaft. The second rotating cylinder component includes two fixed outer plate units in the shape of arcs, and a foldable outer plate unit is disposed between the two sides of the two fixed outer plate units. The foldable outer plate units are hinged to the fixed outer plate units. A first driver is disposed between the fixed outer plate units and the rotating shaft, and a second driver is disposed between the foldable outer plate units and the rotating shaft. The first driver drives the fixed outer plate units to move radially along the rotating shaft to change the distance between the two fixed outer plate units. The second driver drives the foldable outer panel unit to switch between folded and unfolded states.

2. The ship rotating ventilation duct equipment according to claim 1, characterized in that, When the second rotating drum component is in the working state, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating drum component is circular; when the second rotating drum component is in the windproof state, the foldable outer plate unit switches to the folded state so that the cross-section of the second rotating drum component is shaped like a date pit.

3. The ship rotating ventilation duct equipment according to claim 1, characterized in that, The foldable outer panel unit includes two arc-shaped foldable panel assemblies connected by a connector, which is hinged to the arc-shaped foldable panel assemblies. The arc-shaped foldable panel assemblies are hinged to adjacent fixed outer panel units. One end of the second driver is connected to the connector, and the other end of the second driver is connected to a rotating shaft. The second driver drives the connector to move radially along the rotating shaft to switch the state of the foldable outer panel unit.

4. The ship rotating ventilation duct equipment according to claim 3, characterized in that, The arc-shaped folding panel assembly includes a frame component, a fixed shaft, and an arc-shaped panel. The frame component includes two fixed beams, and the fixed shaft is located between the ends of the two fixed beams. The two sides of the arc-shaped panel are respectively connected to the fixed shaft. The frame component is provided with a switching mechanism for changing the protrusion direction of the arc-shaped panel. When the foldable outer panel unit is in the unfolded state, the arc-shaped panel switches to the first protrusion state; when the foldable outer panel unit is in the folded state, the arc-shaped panel switches to the second protrusion state.

5. The ship rotating ventilation duct equipment according to claim 4, characterized in that, The switching mechanism includes a bracket mounted on a fixed beam, a motor mounted on the bracket, and a lead screw connected to the motor; a slider slidably mounted on the bracket, and a lead screw nut mounted on the slider, the lead screw nut being connected to the lead screw; a push block mounted on the slider; a longitudinal rib plate located in the middle of the arc-shaped plate, with a groove on the longitudinal rib plate, the push block extending into the groove; the motor drives the push block to move, thereby causing the longitudinal rib plate located in the middle of the arc-shaped plate to move, thus changing the convex direction of the arc-shaped plate.

6. The ship rotating ventilation duct equipment according to claim 4, characterized in that, The arc-shaped plate is a circular arc-shaped plate structure, and the arc-shaped plate unit is made of spring steel.

7. The ship rotating ventilation duct equipment according to claim 4, characterized in that, The two sides of the arc-shaped plate are respectively provided with second connecting sleeves, which are sleeved on the fixed shaft; the side of the fixed outer plate unit is provided with a first connecting sleeve, and the second connecting sleeve is sleeved on the fixed shaft.

8. The ship rotating ventilation duct equipment according to claim 1, characterized in that, The inner side of the fixed outer plate unit is provided with reinforcing ribs.

9. The ship rotating ventilation duct equipment according to claim 1, characterized in that, The first rotating drum component is connected to the rotating shaft via a connecting column.

10. A control method for a ship's rotating ventilation duct equipment, based on the ship's rotating ventilation duct equipment as described in claim 2, characterized in that, The specific method is as follows: When the wind speed is less than the wind speed threshold during the ship's navigation, the foldable outer plate unit switches to the unfolded state so that the cross-section of the second rotating cylinder component is circular, and the rotating shaft drives the first rotating cylinder component and the second rotating cylinder component to rotate synchronously. When the wind speed exceeds the wind speed threshold, when the second rotating cylinder component is in a sheltered state, the foldable outer panel unit switches to a folded state so that the cross-section of the second rotating cylinder component is shaped like a date pit. The angle of the second rotating cylinder component is adjusted by the rotating shaft so that the projected area of ​​the second rotating cylinder component in the wind direction is minimized.

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