Rotary drum sail device with double-end-plate structure

Abstract

The invention provides a rotary drum sail device. The rotating cylinder sail device comprises a base, a cylinder inner supporting piece, a rotating outer cylinder, an upper end plate and a lower end plate. The in-cylinder support is fixed to an upper portion of the base. The rotary outer cylinder is of a cylindrical structure. And the rotary outer cylinder is positioned above the base. And the rotary outer cylinder is sleeved outside the in-cylinder supporting piece. The rotating outer cylinder is rotatably connected to the in-cylinder support about an axis of rotation. And the outer contour of the upper end plate is circular. The upper end plate is fixed to the upper end of the rotating outer cylinder. And the upper end plate and the rotary outer cylinder are coaxially arranged. The outer diameter of the upper end plate is larger than that of the rotary outer cylinder. The lower end plate is an annular plate. And the lower end plate is positioned above the base. And the lower end plate is sleeved outside the lower end of the rotary outer cylinder. And the lower end plate and the rotary outer cylinder are coaxially arranged. The outer diameter of the lower end plate is larger than that of the rotary outer cylinder. The vortex at the lower part of the rotary outer cylinder can be reduced, and the conversion rate of airflow energy is improved.

Description

Technical Field

[0001] This application generally relates to the technical field of wind-assisted propulsion, and more specifically to a rotating cylinder sail device. Background Art

[0002] The requirements for ship carbon emissions and energy efficiency are becoming increasingly strict, and the market has a strong demand for energy efficiency improvement technologies and products. Among them, wind energy is one of the typical clean energies. Applying the wind-assisted navigation technology can provide clean power for ships, reduce the power output required by the main engine during navigation, significantly reduce fuel consumption, and reduce pollutant emissions, achieving the purpose of energy conservation and emission reduction. As an efficient technical means for ships to efficiently utilize wind energy and save energy and reduce carbon, the rotating cylinder sail device is gradually becoming the focus of the industry. The rotating cylinder sail device is a sail that utilizes the Magnus effect. The Magnus effect refers to that when a rotating object moves in a flow field, due to the velocity difference at different positions in the flow field, a force perpendicular to the rotation direction will be generated on the surface of the object. In the rotating cylinder sail device, this force is the lateral force that pushes the ship forward or changes its course. However, although the rotating cylinder sail device in the related technology can generate a lateral force by utilizing the Magnus effect, it may not be able to fully utilize the energy of the air flow, resulting in relatively large energy losses.

[0003] Therefore, it is necessary to provide a rotating cylinder sail device to at least partially solve the above problems. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further detailed in the Detailed Description section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To at least partially solve the above problems, this application provides a rotating cylinder sail device, which includes:

[0006] A base;

[0007] An inner cylinder support member fixed to the upper part of the base;

[0008] A rotating outer cylinder, which is a cylindrical structure. The rotating outer cylinder is located above the base, the rotating outer cylinder is sleeved outside the inner cylinder support member, and the rotating outer cylinder is rotatably connected to the inner cylinder support member around a rotation axis;

[0009] An upper end plate, the outer contour shape of the upper end plate is circular, the upper end plate is fixed to the upper end of the rotating outer cylinder, the upper end plate is coaxially arranged with the rotating outer cylinder, and the outer diameter of the upper end plate is greater than the outer diameter of the rotating outer cylinder; and

[0010] A lower end plate, which is an annular plate, is located above the base. The lower end plate is sleeved outside the lower end of the rotating outer cylinder, and the lower end plate is coaxially arranged with the rotating outer cylinder, and the outer diameter of the lower end plate is greater than the outer diameter of the rotating outer cylinder.

[0011] Optionally, the inner peripheral surface of the lower end plate is fixed to the rotating outer cylinder.

[0012] Optionally, the outer diameter of the lower end plate is greater than the outer diameter of the upper end plate.

[0013] Optionally, the lower end plate is fixed to the base, and the inner peripheral surface of the lower end plate is spaced apart from the rotating outer cylinder in the radial direction of the rotating outer cylinder.

[0014] Optionally, the rotating cylinder sail device further includes an end plate bracket, and the lower end plate is fixed to the base through the end plate bracket.

[0015] Optionally, the outer diameter of the lower end plate is greater than or equal to 1.2 times the outer diameter of the rotating outer cylinder.

[0016] Optionally, the lower end plate is not lower than the lower end surface of the rotating outer cylinder.

[0017] Optionally, the rotating cylinder sail device further includes a rotation limiting member, which is correspondingly arranged with the lower end of the rotating outer cylinder. The rotation limiting member is connected between the rotating outer cylinder and the lower end plate or between the rotating outer cylinder and the base or between the rotating outer cylinder and the inner cylinder support member, and the rotation limiting member is used to prevent the rotating outer cylinder from contacting the lower end plate in the radial direction of the rotating outer cylinder.

[0018] Optionally, the rotating cylinder sail device further includes a driving disk and a motor. The driving disk is arranged inside the rotating outer cylinder, and the driving disk is rotatably arranged above the inner cylinder support member around the rotation axis. The outer peripheral surface of the driving disk is connected to the inner wall of the rotating outer cylinder, and the motor is drivingly connected to the driving disk.

[0019] Optionally, the motor is located above the inner cylinder support member, and the axis of the motor coincides with the rotation axis.

[0020] According to the rotating cylinder sail device provided by the present application, by arranging an upper end plate at the upper end of the rotating outer cylinder and a lower end plate at the lower end of the rotating outer cylinder, the eddy current formed at the lower part of the rotating outer cylinder can be reduced, thereby reducing the loss of air flow energy caused by the eddy current, and further improving the conversion rate and utilization rate of air flow energy. Description of the Drawings

[0021] The following drawings of the embodiments of the present application are hereby incorporated as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the principles of the present application. In the drawings,

[0022] Figure 1 Schematic diagram of the structure of a rotor sail device according to a first preferred embodiment of the present application;

[0023] Figure 2 Schematic diagram of the structure of a rotor sail device according to a second preferred embodiment of the present application;

[0024] Figure 3A This is a vortex diagram obtained by CFD simulation calculation of a rotor sail device without a lower end plate in the prior art;

[0025] Figure 3B This is a surface pressure diagram obtained by CFD simulation calculation of a rotor sail device without a lower end plate in the prior art;

[0026] Figure 4A To correspond Figure 2 A vortex diagram obtained by CFD simulation calculation of the rotor sail device of the embodiment shown;

[0027] Figure 4B To correspond Figure 2 A surface pressure diagram of the rotor sail device of the embodiment shown obtained through CFD simulation calculation;

[0028] Figure 5A To correspond Figure 1 A vortex diagram obtained by CFD simulation calculation of the rotor sail device of the embodiment shown;

[0029] Figure 5B To correspond Figure 1 A surface pressure diagram of the rotor sail device of the embodiment shown obtained through CFD simulation calculation;

[0030] Figure 6 This is a comparison chart of lift coefficients of a prior art rotor sail device without a lower end plate, a first embodiment of the present application rotor sail device, and a second embodiment of the present application rotor sail device when the lower end plates have different diameters;

[0031] Figure 7 This is a comparison chart of the drag coefficients of a rotor sail device without a lower end plate in the prior art, a rotor sail device in the first embodiment of the present application, and a rotor sail device in the second embodiment with lower end plates having different diameters;

[0032] Figure 8Torque coefficient comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application, where the lower end plates have different diameters;

[0033] Figure 9 Thrust comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application at a wind speed of 5 m / s;

[0034] Figure 10 Thrust comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application at a wind speed of 10 m / s;

[0035] Figure 11 Thrust comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application at a wind speed of 15 m / s;

[0036] Figure 12 Thrust comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application at a wind speed of 20 m / s; and

[0037] Figure 13 Thrust comparison diagrams of the rotary cylinder sail device without a lower end plate in the prior art, the rotary cylinder sail device of the first embodiment in the present application, and the rotary cylinder sail device of the second embodiment in the present application at a wind speed of 25 m / s.

[0038] Explanation of reference numerals:

[0039] 101: Base 102: Inner cylinder support

[0040] 103: Rotating outer cylinder 104: Upper end plate

[0041] 105: Lower end plate 106: Driving disc

[0042] 107: Motor 205: Lower end plate

[0043] 208: End plate support AX1: Axis of rotation Detailed description of the invention

[0044] In the following description, numerous specific details are given to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without one or more of these details. In other instances, some well-known technical features are not described in order to avoid obscuring the embodiments of the present application.

[0045] To thoroughly understand the embodiments of the present application, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art.

[0046] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present application. The singular forms "a", "an", and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof.

[0047] The ordinal numbers such as "first" and "second" cited in the present application are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" does not imply the existence of a "second component" by itself, and the term "second component" does not imply the existence of a "first component" by itself. It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used in the present application are for illustrative purposes only and are not limitations.

[0048] The terms "center", "parallel", "perpendicular", "aligned", "symmetric", etc. used in the present application do not have to be precise but may include typical engineering tolerances.

[0049] Hereinafter, specific embodiments of the present application will be described in more detail with reference to the accompanying drawings, which show representative embodiments of the present application and do not limit the present application.

[0050] The existing rotary cylinder sail device mainly sets end plates at the upper part to enhance the Magnus effect through the end plates. However, there are still some problems in the design of the existing rotary cylinder sail device in practical applications. First, the existing rotary cylinder sail device only sets end plates at the upper part of the rotating outer cylinder. Although this design can utilize the Magnus effect to generate lateral force, it may not be able to fully utilize the energy of the airflow, resulting in relatively large energy loss.

[0051] How to reduce the eddy current loss of the rotating cylinder sail device and improve the energy conversion efficiency, and design an efficient rotating cylinder sail device suitable for engineering promotion has become an urgent problem to be solved.

[0052] The first embodiment

[0053] Referring to Figure 1 , to at least partially solve the above problems, the first embodiment of the present application provides a rotating cylinder sail device. The rotating cylinder sail device includes a base 101, an inner cylinder support 102, a rotating outer cylinder 103, an upper end plate 104, and a lower end plate 105. The inner cylinder support 102 is fixed to the upper part of the base 101. The rotating outer cylinder 103 is a cylindrical structure. The rotating outer cylinder 103 is located above the base 101. The rotating outer cylinder 103 is sleeved outside the inner cylinder support 102. The rotating outer cylinder 103 is rotatably connected to the inner cylinder support 102 about the rotation axis AX1. The outer contour shape of the upper end plate 104 is circular. The upper end plate 104 is fixed to the upper end of the rotating outer cylinder 103. The upper end plate 104 is coaxially arranged with the rotating outer cylinder 103. And the outer diameter of the upper end plate 104 is larger than the outer diameter of the rotating outer cylinder 103. The lower end plate 105 is an annular plate. The lower end plate 105 is located above the base 101. The lower end plate 105 is sleeved outside the lower end of the rotating outer cylinder 103. The lower end plate 105 is coaxially arranged with the rotating outer cylinder 103. And the outer diameter of the lower end plate 105 is larger than the outer diameter of the rotating outer cylinder 103.

[0054] According to the rotating cylinder sail device provided by the first embodiment of the present application, by providing the upper end plate 104 at the upper end of the rotating outer cylinder 103 and the lower end plate 105 at the lower end of the rotating outer cylinder 103, the eddy current formed at the lower part of the rotating outer cylinder 103 can be reduced, thereby reducing the loss of air flow energy caused by the eddy current, and further improving the conversion rate and utilization rate of air flow energy, so as to achieve the purpose of improving the Magnus effect.

[0055] This rotating cylinder sail device can be applied to a ship to provide a boosting force for the ship, thereby helping to save the energy consumption of the ship. In the state where the rotating cylinder sail device is applied to the ship, the rotation axis AX1 is usually parallel to the height direction or the vertical direction of the ship when the rotating cylinder sail device is working.

[0056] In the prior art, because the lower portion of rotating outer cylinder 103 is not provided with a lower end plate 105 such as that described in the present application, but only with an upper end plate 104 such as that described in the present application, vortices are easily generated in the lower portion of rotating outer cylinder 103, preventing much of the airflow energy from being fully utilized through the Magnus effect, resulting in significant airflow energy loss. Compared to the prior art, the provision of lower end plate 105 in the present application helps reduce vortices and turbulence formed in the lower portion of rotating outer cylinder 103, thereby allowing more airflow energy to be utilized through the Magnus effect, thereby helping to reduce airflow energy loss and thereby improving energy conversion efficiency.

[0057] In the first embodiment of the present application, the inner circumference of the lower end plate 105 is fixed to the rotating outer cylinder 103. During the rotation of the rotating outer cylinder 103, both the lower end plate 105 and the upper end plate 104 rotate together with the rotating outer cylinder 103. The synchronous rotation of the lower end plate 105 and the rotating outer cylinder 103 further helps to suppress or reduce eddy currents, thereby further improving the airflow energy loss caused by eddy currents and thereby improving the conversion rate and utilization rate of airflow energy.

[0058] Furthermore, the outer diameter of the lower end plate 105 is greater than the outer diameter of the upper end plate 104. In this case, this is beneficial to enhancing the vortex elimination effect of the rotor sail device and improving the lift coefficient.

[0059] The rotor sail device also includes a drive disc 106 and a motor 107. The drive disc 106 is disposed within the rotating outer cylinder 103 and is rotatably disposed above the inner support member 102 about the rotation axis AX1. The outer circumference of the drive disc 106 is connected to the inner wall of the rotating outer cylinder 103. The motor 107 is transmission-connected to the drive disc 106. The drive disc 106 not only helps maintain the radial position of the rotating outer cylinder 103 relative to the inner support member 102, but also serves as a transmission element, achieving a transmission connection between the motor 107 and the rotating outer cylinder 103, thereby transmitting torque to the rotating outer cylinder 103 and driving the rotating outer cylinder 103 to rotate.

[0060] Furthermore, the motor 107 is located above the inner support member 102. The axis of the motor 107 coincides with the rotation axis AX1. Compared to placing the motor 107 inside the inner support member 102, placing the motor 107 above the inner support member 102 helps reduce the structural complexity of the inner support member 102 and maintain its structural strength. Furthermore, it helps to improve the ease of installation of the motor 107. Since the axis of the motor 107 coincides with the rotation axis AX1, the center of gravity of the motor 107 is centrally located, which helps to improve the stability of the rotor sail device when applied to a ship.

[0061] like Figure 1As shown, in the rotating cylinder sail device according to the first embodiment, a lower end plate 105 that can rotate with the rotating outer cylinder 103 is provided at the bottom of the rotating outer cylinder 103. The lower end plate 105 has a diameter not less than that of the upper end plate 104 and is fixedly attached to the bottom of the rotating outer cylinder 103 coaxially with the rotating outer cylinder 103. The fixing method of the lower end plate 105 varies according to the material of the rotating outer cylinder 103. For example, when the rotating outer cylinder 103 is made of a composite material, the lower end plate 105 can also be made of a composite material and fixed by processes such as hand lay-up.

[0062] Second Embodiment

[0063] Figure 2 Schematically shown is the rotating cylinder sail device according to the second embodiment of the present application. Except for the connection method between the lower end plate 205 and the rotating outer cylinder 103, the rotating cylinder sail device according to the second embodiment has substantially the same structure as the rotating cylinder sail device according to the first embodiment. Among them, structures with the same function are given the same or similar reference numerals. Therefore, for the sake of brevity of description, only the distinguishing features will be introduced in detail here.

[0064] Similar to the rotating cylinder sail device of the first embodiment, the rotating cylinder sail device according to the second embodiment includes a base 101, an inner cylinder support 102, a rotating outer cylinder 103, and an upper end plate 104.

[0065] In the rotating cylinder sail device according to the second embodiment, the lower end plate 205 is fixed to the base 101. And the inner peripheral surface of the lower end plate 205 is spaced apart from the rotating outer cylinder 103 in the radial direction of the rotating outer cylinder 103.

[0066] The rotating cylinder sail device according to the second embodiment further includes an end plate support 208. The lower end plate 205 is fixed to the base 101 through the end plate support 208. During the rotation of the rotating outer cylinder 103, the upper end plate 104 rotates with the rotating outer cylinder 103, and the lower end plate 205 does not rotate with the rotating outer cylinder 103. In this embodiment, the driving torque required for the rotating cylinder sail device is basically the same as that without the lower end plate 205, and the energy saving of the rotating cylinder sail device is relatively good. At the same time, a certain vortex elimination effect can also be achieved through the lower end plate 205, thereby increasing the lift coefficient and further improving the conversion rate of airflow energy.

[0067] Furthermore, the inner peripheral surface of the lower end plate 205 is in clearance fit with the rotating outer cylinder 103 along the outer peripheral surface of the rotating outer cylinder 103. In this embodiment, the friction between the lower end plate 205 and the rotating outer cylinder 103 can be reduced, thereby reducing the obstruction of the lower end plate 205 to the rotation of the rotating outer cylinder 103 during rotation.

[0068] Further, the outer diameter of the lower end plate 205 is greater than or equal to 1.2 times the outer diameter of the rotating outer cylinder 103. This helps to further increase the lift coefficient, thereby further increasing the Magnus force.

[0069] Further, the lower end plate 205 is not lower than the lower end face of the rotating outer cylinder 103. Compared with the case where the lower end plate 205 is lower than the lower end face of the rotating outer cylinder 103, it is beneficial to improve the stability of the vortex elimination effect.

[0070] Further, the rotating cylinder sail device further includes a rotating limiting member (not shown). The rotating limiting member is correspondingly arranged at the lower end of the rotating outer cylinder 103. The rotating limiting member is connected between the rotating outer cylinder 103 and the lower end plate 205 or between the rotating outer cylinder 103 and the base 101 or between the rotating outer cylinder 103 and the in-cylinder support member 102. The rotating limiting member is used to prevent the rotating outer cylinder 103 from contacting the lower end plate 205 in the radial direction of the rotating outer cylinder 103.

[0071] For example, the rotating limiting member is a bearing. The bearing is sleeved outside the rotating outer cylinder 103. And in the radial direction, the bearing is located between the rotating outer cylinder 103 and the lower end plate 205. The bearing includes an outer ring and an inner ring that can rotate relative to each other. The inner ring is fixed to the rotating outer cylinder 103. The outer ring is fixed to the lower end plate 205. During the rotation of the rotating outer cylinder 103, the bearing can reduce the frictional resistance between the rotating outer cylinder 103 and the lower end plate 205, and at the same time, can maintain the position of the rotating outer cylinder 103 relative to the lower end plate 205 in the radial direction, which is beneficial to preventing the lower end of the rotating outer cylinder 103 from undergoing radial displacement or swing during rotation.

[0072] As Figure 2 shown, for the rotating cylinder sail device according to the second embodiment, a lower end plate 205 is fixedly provided at the bottom of the rotating outer cylinder 103. The lower end plate 205 has a diameter not less than that of the upper end plate 104 and is coaxially arranged with the rotating outer cylinder 103 at the bottom of the rotating outer cylinder 103. The lower end plate 205 is fixed to the base 101 through an end plate bracket 208. A gap is left between the lower end plate 205 and the rotating outer cylinder 103. The lower end plate 205 adopts different fixing methods according to the material of the base 101. For example, when the base 101 is made of steel, the lower end plate 205 can also be made of steel and fixed by bolts or welding.

[0073] A wind speed and direction sensor is also provided on the vessel using the rotor sail device of the present application. The wind speed and direction sensor is used to detect wind speed and wind direction. The wind speed and direction sensor is connected to a control device. The control device includes a control unit and a control panel connected thereto. The control unit uses a single-chip microcomputer such as the STM32 series, GD32 series, STC's 51 core series, or Huada Semiconductor's HC32M140. The wind speed and direction sensor in this embodiment can use a PH series anemometer produced by Wuhan New HP Technology Co., Ltd., which is used to measure instantaneous wind speed and direction and average wind speed and direction. The wind speed and direction sensor transmits the detected real-time data to the control device. The control device controls the rotation of the motor 107 according to the vessel's heading and wind speed, thereby controlling the state of the rotor sail device and achieving auxiliary propulsion of the vessel.

[0074] The operating principle of the rotor sail device of the present embodiment is as follows: When a vessel is traveling and encounters a crosswind, the wind acts on the outer circumference of the rotating outer cylinder 103, generating a torque that rotates the outer cylinder 103. Simultaneously, the motor 107 assists the rotation of the outer cylinder 103, generating a forward Magnus force to assist the vessel's propulsion. Under the control of a control device, the motor 107 controls the speed and direction of the rotating outer cylinder 103 based on wind direction and speed data detected by wind speed and direction sensors installed on the vessel, thereby assisting the vessel's propulsion and reducing fuel consumption.

[0075] According to the present invention, the rotor sail device, when applied to a vessel, is mounted on the hull structure via a base 101. A rotating outer cylinder 103 is provided with an upper and lower end plate, respectively, an upper end plate 104 and a lower end plate 205. The upper end plate 104 rotates along with the rotating outer cylinder 103, while the lower end plate 205 can rotate with the rotating outer cylinder 103 or remain fixed to the base 101 and independent of the rotating outer cylinder 103. The addition of the lower end plate 205 reduces eddy currents and enhances the Magnus effect.

[0076] The following uses a rotor sail device of a specific size to simulate and display the vortex structure and surface pressure distribution of the rotor sail device in the prior art, the rotor sail device of the first embodiment of the present application, and the rotor sail device of the second embodiment of the present application. The diameter of the rotating outer cylinder 103 is set to 4 meters and the height is set to 24 meters. The diameter of the upper end plate 104 is set to 8 meters. The length and width of the base 101 are set to 5.6 meters respectively. The height of the base 101 is set to 4.2 meters. The wind speed is set to 25 meters per second. The peripheral speed ratio is set to 2. Thus, it is obtained Figure 3A 、 4A and Figure 5A The vortex diagram, Figure 3B 、 4B and Figure 5B Surface pressure diagram.

[0077] As Figure 3A and Figure 3B shown, in the existing technology, in addition to the pointed vortices caused at the top of the rotating cylinder sail device, horseshoe vortices are also generated at the base 101. The generation of these vortices changes the flow structure of the fluid at the bottom of the rotating cylinder sail device and the surface pressure distribution of the rotating cylinder sail device, reducing the value and range of the low-pressure area at the bottom, interfering with the generation of lift in the bottom area, and increasing the local resistance, which has a greater impact on the aerodynamic performance of the bottom surface of the rotating cylinder sail device and thus has a greater impact on the overall thrust coefficient of the rotating cylinder sail device.

[0078] As Figure 4A and Figure 4B shown, compared with the existing technology without a lower end plate, the lower end plate 205 fixed to the base 101 significantly reduces the vortices caused at the base 101. Compared with Figure 3A and Figure 3B , this reduces the influence of the vortices on the low-pressure area at the bottom of the rotating cylinder sail device, thereby expanding the value and range of the low-pressure area at the bottom and thus being beneficial to the increase of lift.

[0079] As Figure 5A and Figure 5B shown, compared with the existing technology without a lower end plate, the lower end plate 105 rotating with the rotating outer cylinder 103 significantly reduces the vortices caused at the base 101 during rotation. Compared with Figure 4A and Figure 4B , this further reduces the influence of the vortices on the low-pressure area at the bottom of the rotating cylinder sail device, thereby further expanding the value and range of the low-pressure area at the bottom, and thus the lift will also be further increased.

[0080] The aerodynamic characteristics of the rotating cylinder sail device are mainly the lift coefficient, drag coefficient, and torque coefficient at different speed ratios. Referring below to Figures 6 to 8 , the diameter of the lower end plate is taken as 4 m, 4.8 m, 6.4 m, 8 m, and 9.6 m respectively, and the lift coefficient, drag coefficient, and torque coefficient of the rotating cylinder sail device in three cases of no lower end plate, the lower end plate 105 fixed to the rotating outer cylinder 103, and the lower end plate 205 fixed to the base 101 are compared.

[0081] As Figure 6 shown, for the rotating cylinder sail device with the lower end plate 105 fixed to the rotating outer cylinder 103, the lift coefficient increases with the increase of the diameter of the lower end plate 105. For the rotating cylinder sail device with the lower end plate 205 fixed to the base 101, its lift coefficient is higher than that of the rotating cylinder sail device without the lower end plate 205 when the diameter of the lower end plate 205 is greater than 5 m.

[0082] As Figure 7As shown, for the rotating cylinder sail device with the lower end plate 105 fixed to the rotating outer cylinder 103, the value of its drag coefficient first increases and then decreases. The drag coefficient reaches its maximum value when the diameter of the lower end plate 105 is about 6.4 meters, and the drag coefficient gradually decreases after the diameter of the lower end plate 105 exceeds 6.4 meters. For the rotating cylinder sail device with the lower end plate 205 fixed to the base 101, its drag coefficient begins to increase when the diameter of the lower end plate 205 is greater than 4.8 meters, and the drag coefficient is greater than that without the lower end plate 205 in all cases.

[0083] As Figure 8 shown, for the rotating cylinder sail device with the lower end plate 105 fixed to the rotating outer cylinder 103, its torque coefficient increases with the increase in the diameter of the lower end plate 105. For the rotating cylinder sail device with the lower end plate 205 fixed to the base 101, its torque coefficient is basically the same as that without the lower end plate.

[0084] Figures 9 to 13 Schematically shows the influence of different wind conditions on the thrust of three rotating cylinder sail devices: the rotating cylinder sail device without a lower end plate in the prior art, the rotating cylinder sail device of the first embodiment of the present application, and the rotating cylinder sail device of the second embodiment of the present application. It is assumed that the diameters and heights of the rotating outer cylinders 103, the diameters of the upper end plates 104, and the lengths, widths, and heights of the bases 101 of the three rotating cylinder sail devices are the same. The diameter of the lower end plate 105 of the rotating cylinder sail device of the first embodiment of the present application is the same as the diameter of the lower end plate 205 of the rotating cylinder sail device of the second embodiment. In the figure, "rotating lower end plate" corresponds to the rotating cylinder sail device of the first embodiment of the present application. "Non-rotating lower end plate" in the figure corresponds to the rotating cylinder sail device of the second embodiment of the present application. "Without lower end plate" in the figure corresponds to the rotating cylinder sail device without a lower end plate in the prior art.

[0085] Referring to Figures 9 to 13 any of the figures in, it can be seen that: at the same wind speed, by comparing the thrusts of the rotating cylinder sail device of the first embodiment of the present application, the rotating cylinder sail device of the second embodiment of the present application, and the rotating cylinder sail device without a lower end plate in the prior art at different wind direction angles, it can be known that the thrust of the rotating cylinder sail device with a lower end plate is greatly improved compared to the thrust of the rotating cylinder sail device without a lower end plate. At the same time, the thrust generated by the rotating cylinder sail device of the first embodiment of the present application is greater than the thrust of the rotating cylinder sail device of the second embodiment of the present application.

[0086] Referring to Figures 9 to 13 , for the same rotating cylinder sail device, as the wind speed increases, the generated thrust also increases. And at each wind speed, the thrust of the rotating cylinder sail device of the first embodiment of the present application is greater than the thrust of the rotating cylinder sail device of the second embodiment of the present application.

[0087] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit this application. Terms such as "arranged" as used herein can mean either that one component is directly attached to another component or that one component is attached to another component through an intermediate component. Features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0088] This application has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and exemplary purposes only and are not intended to limit this application to the scope of the described embodiments. Those skilled in the art can understand that according to the teachings of this application, more variations and modifications can be made, and these variations and modifications all fall within the scope claimed by this application.

Claims

1. A rotary cylinder sail device, characterized in that, The rotating cylinder sail device includes: A base; An inner cylinder support member fixed to the upper part of the base; A rotating outer cylinder which is a cylindrical structure, located above the base, sleeved outside the inner cylinder support member, and rotatably connected to the inner cylinder support member around a rotation axis; An upper end plate with a circular outer contour shape, fixed to the upper end of the rotating outer cylinder, coaxially arranged with the rotating outer cylinder, and the outer diameter of the upper end plate is larger than the outer diameter of the rotating outer cylinder; and A lower end plate which is an annular plate, located above the base, sleeved outside the lower end of the rotating outer cylinder, coaxially arranged with the rotating outer cylinder, and the outer diameter of the lower end plate is larger than the outer diameter of the rotating outer cylinder.

2. The rotary cylinder sail device according to claim 1, characterized in that, The inner circumferential surface of the lower end plate is fixed to the rotating outer cylinder.

3. The rotating cylinder sail device according to claim 2, characterized in that The outer diameter of the lower end plate is larger than the outer diameter of the upper end plate.

4. The rotating cylinder sail device according to claim 1, characterized in that The lower end plate is fixed to the base, and the inner circumferential surface of the lower end plate is spaced apart from the rotating outer cylinder in the radial direction of the rotating outer cylinder.

5. The rotating cylinder sail device according to claim 4, characterized in that The rotating cylinder sail device further includes an end plate support, and the lower end plate is fixed to the base through the end plate support.

6. The rotating cylinder sail device according to claim 4, characterized in that The outer diameter of the lower end plate is greater than or equal to 1.2 times the outer diameter of the rotating outer cylinder.

7. The rotary cylinder sail device according to claim 4, characterized in that, The lower end plate is not lower than the lower end face of the rotating outer cylinder.

8. The rotating cylinder sail device according to claim 4, characterized in that The rotating cylinder sail device further includes a rotation limiting member correspondingly arranged with the lower end of the rotating outer cylinder, connected between the rotating outer cylinder and the lower end plate or between the rotating outer cylinder and the base or between the rotating outer cylinder and the inner cylinder support member, and the rotation limiting member is used to prevent the rotating outer cylinder from contacting the lower end plate in the radial direction of the rotating outer cylinder.

9. The rotating cylinder sail device according to any one of claims 1 to 8, characterized in that The rotating cylinder sail device further includes a driving disc and a motor. The driving disc is arranged inside the rotating outer cylinder and rotatably arranged above the inner cylinder support member around the rotation axis. The outer peripheral surface of the driving disc is connected to the inner wall of the rotating outer cylinder, and the motor is drivingly connected to the driving disc.

10. The rotating cylinder sail device according to claim 9, characterized in that The motor is located above the inner cylinder support member, and the axis of the motor coincides with the rotation axis.

Images