Rotary drum sail structure with guide fins and using method of rotary drum sail structure

Abstract

The drum sail structure comprises a main body module and an adjusting module, the adjusting module is installed on the main body module, the main body module comprises a fixed cover plate, an air duct and a driving mechanism, the fixed cover plate comprises an upper fixed cover plate and a lower fixed cover plate, the air duct is arranged between the upper fixed cover plate and the lower fixed cover plate, and the driving mechanism is arranged between the upper fixed cover plate and the lower fixed cover plate. A transmission shaft is arranged in the axial direction of the air duct and rotationally connected with the centers of the upper fixing cover plate and the lower fixing cover plate, and a driving mechanism is arranged at the lower end of the lower fixing cover plate. The adjusting module comprises a rotating shaft, guide fins and a control module, the guide fins are symmetrically arranged on the two sides of the air duct, and the guide fins are connected with the upper fixing cover plate and the lower fixing cover plate through the rotating shaft arranged in the axial direction. According to the drum sail, the deflection angle is effectively changed through the arrangement of the flow guide fins, target optimization is conducted on thrust and a flow field, rectification is conducted on the turbulence working condition, and the working capacity of the drum sail under the full working condition is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a rotary sail structure with guide vanes and a use method thereof. Background Art

[0002] With the IMO's upgraded requirements for green and low-carbon shipping industry, domestic and foreign academic and industrial circles have carried out a lot of research and application demonstrations on wind-assisted propulsion systems. Rotating sails are increasingly used in ocean-going ships due to their small footprint, high propulsion efficiency, and strong ability to withstand severe wind conditions.

[0003] The drum sail was proposed by German engineer Anton Flettner in 1920. Under the action of the incoming flow, the rotating cylinder will be subjected to a lateral force perpendicular to the incoming flow direction. By adjusting the rotation direction and speed of the rotor, a thrust along the length of the ship can be generated in the state of crosswind or oblique wind, which can propel the ship forward. Based on the Magnus principle, when the direction of the rotating angular velocity vector of a rotating object in a viscous fluid is inconsistent with the direction of the object's motion velocity vector, an axial force will be applied to the plane formed by them. Using the Bernoulli principle in fluid mechanics to explain, when the wind tube rotates, the fluid speed on one side is accelerated and the fluid speed on the other side is slowed down, which will cause a pressure difference on both sides, thereby generating a driving force perpendicular to the direction of the airflow. The magnitude of the driving force is related to the drum speed, the angle and area of ​​the airflow. However, when existing ships are sailing, the drum sail will be subjected to a large lateral wind load, which affects the operating characteristics of the wind tube, increases the power consumption and mechanical vibration of the wind tube, and reduces the safety and stability of the use of the wind tube. By adding guide vanes, this patent can effectively increase the thrust of the wind tube, reduce the energy consumption of the wind tube, reduce the lateral wind load intensity of the wind tube, improve the energy efficiency ratio of the rotary sail, and utilize wind power more efficiently, which is of great significance to the green and energy-saving development of ships. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a rotary sail structure with guide vanes and a method of use. The present invention effectively changes the deflection angle through the setting of guide vanes, optimizes the thrust and flow field, rectifies turbulent conditions, and improves the working capacity of the rotary sail under all working conditions.

[0005] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0006] A rotary sail structure with guide vanes comprises a main body module and an adjustment module, wherein the adjustment module is installed on the main body module, wherein the main body module comprises a fixed cover plate, a wind tube and a driving mechanism, wherein the fixed cover plate comprises an upper fixed cover plate and a lower fixed cover plate, wherein a wind tube is arranged between the upper fixed cover plate and the lower fixed cover plate, wherein a transmission shaft is arranged in the axial direction of the wind tube, wherein the transmission shaft is respectively rotatably connected with the center of the upper fixed cover plate and the lower fixed cover plate, wherein a driving mechanism is arranged at the lower end of the lower fixed cover plate, wherein the driving shaft of the driving mechanism is connected with the transmission shaft, wherein the driving mechanism drives the wind tube to rotate between the upper fixed cover plate and the lower fixed cover plate by driving the transmission shaft; wherein the adjustment module comprises a rotating shaft, a guide vane and a control module, wherein guide vanes are symmetrically arranged on both sides of the wind tube, wherein the guide vane is arranged between the upper fixed cover plate and the lower fixed cover plate, wherein the guide vane is respectively connected with the upper fixed cover plate and the lower fixed cover plate by a rotating shaft arranged in the axial direction, wherein the rotating shaft drives the guide vane to rotate to adjust the deflection angle of the guide vane, and wherein the control module controls the rotation angle of the rotating shaft.

[0007] Furthermore, the upper fixed cover plate has the same structure as the lower fixed cover plate, the upper fixed cover plate is circular as a whole, and the wind tube is cylindrical as a whole.

[0008] Furthermore, the guide vane is in the shape of an airfoil as a whole, and a rotating shaft is arranged at the front end of the airfoil; the power source for the rotating shaft is the exhaust gas turbine of the main engine of the ship or the main generator of the ship.

[0009] Furthermore, the driving mechanism is a variable frequency motor or a speed regulating gear box.

[0010] Furthermore, the control module is a single chip microcomputer or a computer integrated circuit, and the airflow detection module is installed on the upper part of the drum sail to detect wind speed and direction.

[0011] A method for using a rotary sail with guide vanes, the method specifically comprising the following steps:

[0012] S1, prepare a rotary sail structure with guide vanes, including a main body module and an adjustment module, the adjustment module is installed on the main body module, the main body module includes a fixed cover plate, a wind tube and a driving mechanism, the fixed cover plate includes an upper fixed cover plate and a lower fixed cover plate, a wind tube is arranged between the upper fixed cover plate and the lower fixed cover plate, a transmission shaft is arranged in the axial direction of the wind tube, the transmission shaft is respectively connected to the center of the upper fixed cover plate and the lower fixed cover plate for rotation, a driving mechanism is arranged at the lower end of the lower fixed cover plate, the driving shaft of the driving mechanism is connected to the transmission shaft, the driving mechanism drives the wind tube to rotate between the upper fixed cover plate and the lower fixed cover plate by driving the transmission shaft; the adjustment module includes a rotating shaft, guide vanes and a control module, guide vanes are symmetrically arranged on both sides of the wind tube, the guide vanes are arranged between the upper fixed cover plate and the lower fixed cover plate, the guide vanes are respectively connected to the upper fixed cover plate and the lower fixed cover plate by a rotating shaft arranged in the axial direction, the rotating shaft drives the guide vanes to rotate to adjust the deflection angle of the guide vanes, and the control module controls the rotation angle of the rotating shaft;

[0013] S2, after the drum sail is installed on the ship, during the operation of the ship, the airflow detection module detects the wind direction and strength of the airflow at the drum sail, and transmits the detection signal to the control module, and the control module controls the driving mechanism to change the rotation speed of the wind tube according to the received detection signal;

[0014] The airflow detection module detects the wind direction and strength of the airflow, and the control module changes the speed of the driving mechanism, thereby driving the rotary sail to rotate. The thrust detection module detects and feedbacks the thrust generated by the wind tube, and optimizes the control through the control module. The control module inputs the adjustment signal to the speed regulating gear or frequency conversion motor of the driving mechanism to rotate, change the speed of the wind tube, and after feedback adjustment by the thrust detector, it is used as a control link for closed-loop control.

[0015] S3, when the wind tube rotates, the thrust detection module detects the thrust generated when the wind tube rotates, and feeds back the thrust detection signal to the control module, and the control module controls the driving structure to adjust the speed of the wind tube according to the received inference detection signal;

[0016] The thrust detection module is connected to the drum sail, and specifically a strain gauge type can be used. The thrust of the drum sail is converted by measuring the strain gauge strain-stress conversion, which can be used to calculate the power saving calculation problem of the drum sail, which is currently lacking.

[0017] S4, the control module inputs the adjustment signal to the speed regulating gear or frequency conversion motor of the driving mechanism to rotate, change the deflection angle of the guide vane, and after feedback adjustment by the thrust detector, it is used as a control link for closed-loop control.

[0018] Based on the above technical solution, the present invention has achieved the following technical advantages through practical application of a rotary sail structure with guide vanes and a method of using the rotary sail structure:

[0019] 1. The present invention provides a method for using a rotary sail with guide vanes, which effectively changes the deflection angle by setting the guide vanes, optimizes the thrust and flow field, rectifies the turbulent working conditions, and improves the working capacity of the rotary sail under all working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a rotary sail in a rotary sail structure with guide vanes according to the present invention.

[0021] Figure 2 The present invention is a structural diagram of guide vanes in a rotary sail structure with guide vanes.

[0022] Figure 3 The present invention discloses a control flow chart of a rotary sail in a rotary sail structure with guide vanes.

[0023] Figure 4 The present invention discloses a streamline distribution diagram of a cross section of a rotary sail in a rotary sail structure with guide vanes.

[0024] Figure 5 It is a comparison diagram of the lift of the guide vanes in a rotary sail structure with guide vanes according to the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] like Figure 1-5As shown, the present invention belongs to a rotary sail structure with guide vanes, characterized in that it includes a main body module and an adjustment module, the adjustment module is installed on the main body module, the main body module includes a fixed cover plate, a wind tube 4 and a driving mechanism 1, the fixed cover plate includes an upper fixed cover plate 5 and a lower fixed cover plate 2, the wind tube 4 is arranged between the upper fixed cover plate 5 and the lower fixed cover plate 2, the wind tube 4 is arranged with a transmission shaft 7 in the axial direction, the transmission shaft 7 is respectively connected to the center of the upper fixed cover plate 5 and the lower fixed cover plate 2 for rotation, the lower end of the lower fixed cover plate 2 is provided with a driving mechanism 1, and the driving shaft of the driving mechanism 1 Connected with the transmission shaft 7, the driving mechanism 1 drives the air duct 4 to rotate between the upper fixed cover plate 5 and the lower fixed cover plate 2 by driving the transmission shaft 7; the adjustment module includes a rotating shaft 8, a guide vane 3 and a control module, the air duct 4 is symmetrically provided with guide vanes 3 on both sides, the guide vanes 3 are arranged between the upper fixed cover plate 5 and the lower fixed cover plate 2, the guide vanes 3 are respectively connected to the upper fixed cover plate 5 and the lower fixed cover plate 2 by providing a rotating shaft 8 in the axial direction, the rotating shaft 8 drives the guide vanes 3 to rotate to adjust the deflection angle of the guide vanes 3, and the control module controls the rotation angle of the rotating shaft 8.

[0027] The upper fixed cover plate 5 has the same structure as the lower fixed cover plate 2 . The upper fixed cover plate 5 is circular in shape, and the wind tube 4 is cylindrical in shape. The diameter of the upper fixed cover plate 5 is 2-4 times the diameter of the wind tube 4 .

[0028] The guide vane 3 is in the shape of an airfoil as a whole, and a rotating shaft 8 is disposed at the front end of the airfoil; the rotating shaft 8 is powered by an exhaust gas turbine of a main engine of the ship or a main generator of the ship itself.

[0029] The driving mechanism 1 is a variable frequency motor or a speed regulating gear box.

[0030] The control module is a single chip microcomputer or a computer integrated circuit, and the airflow detection module is installed on the upper part of the rotary sail to detect the wind speed and direction.

[0031] A method for using a rotary sail with guide vanes, the method specifically comprising the following steps:

[0032] S1, prepare a rotary sail structure with guide vanes, including a main body module and an adjustment module, the adjustment module is installed on the main body module, the main body module includes a fixed cover plate, a wind tube 4 and a driving mechanism 1, the fixed cover plate includes an upper fixed cover plate 5 and a lower fixed cover plate 2, the wind tube 4 is arranged between the upper fixed cover plate 5 and the lower fixed cover plate 2, the wind tube 4 is arranged with a transmission shaft 7 in the axial direction, the transmission shaft 7 is respectively connected to the center of the upper fixed cover plate 5 and the lower fixed cover plate 2 for rotation, the lower end of the lower fixed cover plate 2 is provided with a driving mechanism 1, the driving shaft of the driving mechanism 1 is connected to the transmission shaft 7 is connected, the driving mechanism 1 drives the air duct 4 to rotate between the upper fixed cover plate 5 and the lower fixed cover plate 2 by driving the transmission shaft 7; the adjusting module includes a rotating shaft 8, a guide vane 3 and a control module, the air duct 4 is symmetrically provided with guide vanes 3 on both sides, the guide vanes 3 are provided between the upper fixed cover plate 5 and the lower fixed cover plate 2, the guide vanes 3 are respectively connected with the upper fixed cover plate 5 and the lower fixed cover plate 2 by providing a rotating shaft 8 in the axial direction, the rotating shaft 8 drives the guide vanes 3 to rotate to adjust the deflection angle of the guide vanes 3, and the control module controls the rotation angle of the rotating shaft 8;

[0033] S2, after the drum sail is installed on the ship, during the operation of the ship, the airflow detection module detects the wind direction and strength of the airflow at the drum sail, and transmits the detection signal to the control module, and the control module controls the driving mechanism 1 to change the rotation speed of the wind tube 4 according to the received detection signal;

[0034] The airflow detection module detects the wind direction and strength of the airflow, and the control module changes the speed of the driving mechanism 1, thereby driving the rotary sail to rotate. The thrust detection module detects and feedbacks the thrust generated by the wind tube 4, and optimizes the control through the control module. The control module inputs the adjustment signal to the speed regulating gear or frequency conversion motor of the driving mechanism 1 to rotate, change the speed of the wind tube 4, and after feedback adjustment by the thrust detector, it is used as a control link for closed-loop control.

[0035] S3, when the wind tube 4 rotates, the thrust detection module detects the thrust generated when the wind tube 4 rotates, and feeds back the thrust detection signal to the control module, and the control module controls the driving structure to adjust the speed of the wind tube 4 according to the received inference detection signal;

[0036] The thrust detection module is connected to the drum sail, and specifically a strain gauge type can be used. The thrust of the drum sail is converted by measuring the strain gauge strain-stress conversion, which can be used to calculate the power saving calculation problem of the drum sail, which is currently lacking.

[0037] S4, the control module inputs the adjustment signal to the speed regulating gear or frequency conversion motor of the driving mechanism 1 to rotate, change the deflection angle of the guide vane 3, and after feedback adjustment by the thrust detector, it is used as a control link for closed-loop control.

[0038] Thrust detection is used to verify energy saving power, can be used to calculate the EEDI of the entire flight, and conduct economic and efficiency analysis for future route optimization.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A rotary sail structure with guide vanes, characterized in that: The invention comprises a main body module and an adjustment module, wherein the adjustment module is installed on the main body module, the main body module comprises a fixed cover plate, a wind tube and a driving mechanism, the fixed cover plate comprises an upper fixed cover plate and a lower fixed cover plate, a wind tube is arranged between the upper fixed cover plate and the lower fixed cover plate, a transmission shaft is arranged in the axial direction of the wind tube, the transmission shaft is respectively connected to the center of the upper fixed cover plate and the lower fixed cover plate for rotation, a driving mechanism is arranged at the lower end of the lower fixed cover plate, the driving shaft of the driving mechanism is connected to the transmission shaft, and the driving mechanism drives the wind tube to rotate between the upper fixed cover plate and the lower fixed cover plate by driving the transmission shaft; the adjustment module comprises a rotating shaft, a guide vane and a control module, guide vanes are symmetrically arranged on both sides of the wind tube, the guide vanes are arranged between the upper fixed cover plate and the lower fixed cover plate, the guide vanes are respectively connected to the upper fixed cover plate and the lower fixed cover plate by a rotating shaft arranged in the axial direction, the rotating shaft drives the guide vanes to rotate to adjust the deflection angle of the guide vanes, and the control module controls the rotation angle of the rotating shaft.

2. A rotary sail structure with guide vanes according to claim 1, characterized in that: The upper fixed cover plate has the same structure as the lower fixed cover plate. The upper fixed cover plate is circular as a whole, and the wind tube is cylindrical as a whole.

3. A rotary sail structure with guide vanes according to claim 1, characterized in that: The guide vane is in the shape of an airfoil as a whole, and a rotating shaft is arranged at the front end of the airfoil; the power source for the rotating shaft is the exhaust gas turbine of the main engine of the ship or the main generator of the ship.

4. A rotary sail structure with guide vanes according to claim 1, characterized in that: The driving mechanism is a variable frequency motor or a speed regulating gear box.

5. The rotary sail structure with guide vanes according to claim 1, characterized in that: The control module is a single chip microcomputer or a computer integrated circuit, and the airflow detection module is installed on the upper part of the rotary sail to detect the wind speed and direction.

6. A method for using a rotary sail with guide vanes, characterized in that: The method specifically comprises the following steps: S1, prepare a rotary sail structure with guide vanes, including a main body module and an adjustment module, the adjustment module is installed on the main body module, the main body module includes a fixed cover plate, a wind tube and a driving mechanism, the fixed cover plate includes an upper fixed cover plate and a lower fixed cover plate, a wind tube is arranged between the upper fixed cover plate and the lower fixed cover plate, a transmission shaft is arranged in the axial direction of the wind tube, the transmission shaft is respectively connected to the center of the upper fixed cover plate and the lower fixed cover plate for rotation, a driving mechanism is arranged at the lower end of the lower fixed cover plate, the driving shaft of the driving mechanism is connected to the transmission shaft, the driving mechanism drives the wind tube to rotate between the upper fixed cover plate and the lower fixed cover plate by driving the transmission shaft; the adjustment module includes a rotating shaft, guide vanes and a control module, guide vanes are symmetrically arranged on both sides of the wind tube, the guide vanes are arranged between the upper fixed cover plate and the lower fixed cover plate, the guide vanes are respectively connected to the upper fixed cover plate and the lower fixed cover plate by a rotating shaft arranged in the axial direction, the rotating shaft drives the guide vanes to rotate to adjust the deflection angle of the guide vanes, and the control module controls the rotation angle of the rotating shaft; S2, after the drum sail is installed on the ship, during the operation of the ship, the airflow detection module detects the wind direction and strength of the airflow at the drum sail, and transmits the detection signal to the control module, and the control module controls the driving mechanism to change the rotation speed of the wind tube according to the received detection signal; The wind direction and strength of the airflow are detected by the airflow detection module (9), and the rotation speed of the driving mechanism (1) is changed by the control module (11), thereby driving the rotary drum sail to rotate. The thrust detection module (10) detects and feeds back the thrust generated by the wind tube (4), and optimizes and controls it through the control module (11). The control module (11) inputs an adjustment signal to the speed regulating gear or frequency conversion motor of the driving mechanism (1) to rotate, thereby changing the rotation speed of the wind tube. After feedback adjustment by the thrust detector (10), it is used as a control link to perform closed-loop control. S3, when the wind tube rotates, the thrust detection module detects the thrust generated when the wind tube rotates, and feeds back the thrust detection signal to the control module, and the control module controls the driving structure to adjust the speed of the wind tube according to the received inference detection signal; The thrust detection module is connected to the drum sail, and specifically a strain gauge type can be used. The thrust of the drum sail is converted by measuring the strain gauge strain-stress conversion, which can be used to calculate the power saving calculation problem of the drum sail, which is currently lacking. S4, the control module (11) inputs a regulating signal to the speed regulating gear or frequency conversion motor of the driving mechanism (1) to rotate, thereby changing the deflection angle of the guide vane (3), and after feedback adjustment by the thrust detector (10), a closed-loop control is performed as a control link.

Images