Wind power propulsion systems and ships

Abstract

This disclosure relates to a wind-powered propulsion system 4 comprising a wind-powered engagement unit 6, a first hydraulic actuator 8 positioned to generate a first tilting force for tilting the wind-powered engagement unit, and a main hydraulic control configuration 10 for controlling the first hydraulic actuator. A bypass configuration 30 is connected to a second pressure chamber 28 of the actuator 8. The bypass configuration is separated from the main hydraulic control configuration. The wind-powered propulsion system is configured for tilting the wind-powered engagement unit using a second tilting force generated independently of the main hydraulic control configuration. The bypass configuration 30 is configured to guide hydraulic fluid from the second pressure chamber 28 when tilting the wind-powered engagement unit using the second tilting force.

Description

Technical Field

[0001] The present disclosure relates to a wind propulsion system and a ship.

Background Art

[0002] Sails have long been known as a means for propelling a ship. Conventionally, flexible sails made of fabric have been mounted on a mast to utilize the power of the wind to propel a ship.

[0003] Modern ships generally use fossil fuels and combustion engines to propel the ship. The use of wind propulsion has been proposed to reduce the overall consumption of fossil fuels. For this purpose, one or more wind engagement units can be used. In addition to the common flexible sheet-formed sails, such wind engagement units can be equipped with various types of rigid or flexible sails, such as wing sails, rotor sails, wind turbines, or similar means.

[0004] The magnitude of the propulsion power generated by the wind engagement unit is related to several interrelated factors, but the wind engagement area of the wind engagement unit, that is, the area of the wind engagement unit that engages with the wind in a manner that gives propulsion force to the ship and is thus exposed to wind loads, and other shapes and aerodynamic characteristics are the main performance indicators.

[0005] For the purpose of controlling the generated propulsion power, one or more aspects of the wind engagement unit may be controllable. Some wind engagement units may be controllable between an effective position and an ineffective position. In the effective position, the wind engagement unit generates propulsion power. In the ineffective position of the wind engagement unit, no propulsion power is generated, or the generated propulsion power is at least greatly reduced.

[0006] For example, a wind-powered engagement unit equipped with sails or rotor sails of various types of rigidity can be tilted from an upright position. In the upright position, the wind-powered engagement unit may be in an effective position, and when fully tilted, the wind-powered engagement unit is in its ineffective position.

[0007] A control configuration, including a hydraulic power actuator, may be arranged to control the appearance of the wind-engaged unit, including its tilt. [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] In some vessels, the safety measure that should be taken may be the tilting of the wind engagement unit of the wind propulsion system. For example, strong winds may require the wind engagement unit to be positioned in its tilted, inactive position to ensure the safe navigation of the vessel. Also, passing under a bridge may require the tilting of the wind engagement unit.

[0009] It is advantageous to achieve a wind propulsion system that includes a wind engagement unit that ensures the inclination of the wind engagement unit. Specifically, it is desirable to enable the inclination of the wind engagement unit of the wind propulsion system even if the main control configuration of the wind propulsion system malfunctions. To better address one or more of these concerns, one or more wind propulsion systems and vessels having the features set forth in one or more of the independent claims are provided. [Means for solving the problem]

[0010] In one embodiment, a wind-powered propulsion system is provided, comprising a wind-powered engagement unit, a first hydraulic actuator positioned to generate a first tilting force for tilting the wind-powered engagement unit, and a main hydraulic control configuration for controlling the first hydraulic actuator. The first hydraulic actuator comprises a first pressure chamber for receiving hydraulic fluid to generate a first tilting force, and a second pressure chamber for receiving hydraulic fluid to generate a force opposite to the first tilting force. The main hydraulic control configuration is configured to direct the hydraulic fluid into or out of the first and second pressure chambers. The wind-powered propulsion system further comprises a bypass configuration connected to a second pressure chamber, the bypass configuration being separated from the main hydraulic control configuration. The wind-powered propulsion system is configured for tilting the wind-powered engagement unit using a second tilting force generated independently of the main hydraulic control configuration. The bypass configuration is configured to guide the hydraulic fluid out of the second pressure chamber when tilting the wind-powered engagement unit using the second tilting force.

[0011] The wind-powered propulsion system includes a bypass configuration connected to a second pressure chamber, the bypass configuration is separated from the main hydraulic control configuration, the wind-powered propulsion system is configured for tilting a wind-powered engagement unit using a second tilting force generated independently of the main hydraulic control configuration, and the bypass configuration is configured to guide the hydraulic fluid from the second pressure chamber when the wind-powered engagement unit is tilted using the second tilting force. Thus, the wind-powered engagement unit can tilt independently of the main hydraulic control configuration. Therefore, the wind-powered engagement unit can tilt even if the main hydraulic control configuration malfunctions.

[0012] More specifically, the bypass configuration is separated from the main hydraulic control configuration and configured to guide the hydraulic fluid from the second pressure chamber. Therefore, if the main hydraulic control configuration malfunctions, the hydraulic fluid can be guided from the second pressure chamber when the second tilting force is used to tilt the wind-engaged unit. Consequently, the main hydraulic control configuration is not required to guide the hydraulic fluid from the second pressure chamber.

[0013] In a further embodiment, a vessel is provided that is equipped with a wind propulsion system according to any one of the embodiments and / or models discussed herein.

[0014] As a result, the wind engagement unit of the wind propulsion system included in the ship can be tilted even if the main hydraulic control configuration malfunctions, as described above.

[0015] The wind propulsion system is configured to contribute at least to the propulsion of the vessel on which it is installed. The vessel referred to herein as "ship" is typically a vessel used for the maritime transport of goods and / or passengers. However, the vessel may instead be a leisure yacht.

[0016] A wind-powered propulsion system may be referred to as a propulsion system instead in this specification.

[0017] As previously mentioned, a wind propulsion system includes a wind engagement unit, that is, a unit adapted for engagement with wind to propel a vessel.

[0018] According to the embodiment, the wind-engaged unit may comprise or consist of a wing sail, rotor sail, turbo sail, or similar device. In other words, the wind-engaged unit is of a kind that comprises one or more rigid components that may need to be tilted in certain circumstances, such as supporting a structure, mast, and / or sail by itself.

[0019] A first hydraulic actuator is positioned to tilt the wind-powered engagement unit under the control of a primary first hydraulic actuator. In the fully tilted position, the wind-powered engagement unit is deactivated and contributes little to no to propelling the ship. A first hydraulic actuator may also be positioned to raise the wind-powered engagement unit to an upright position. In the upright position, the wind-powered engagement unit can be activated and contribute to propelling the ship, and some wind-powered engagement units can be deactivated when upright by being positioned in a non-propulsion configuration. This may be possible, for example, with wing sails.

[0020] When the hydraulic fluid is directed towards the first pressure chamber of the first hydraulic actuator by the main hydraulic control configuration, the first hydraulic actuator generates a first tilting force.

[0021] The force opposite to the first tilting force may be a force that lifts the wind-powered engagement unit. Therefore, when the hydraulic fluid is directed by the main hydraulic control configuration into the second pressure chamber of the first hydraulic actuator, the first hydraulic actuator generates a force opposite to the first tilting force, i.e., a force that lifts the wind-powered engagement unit.

[0022] The wind-powered propulsion system may include two or more first hydraulic actuators for tilting and lifting the wind-powered engagement unit.

[0023] As mentioned above, the main hydraulic control configuration is configured to direct the hydraulic fluid into or out of the first and second pressure chambers. This means that the main hydraulic control configuration may include one or more of the following: a hydraulic pump, flow control valves, control logic, etc.

[0024] Under normal operating conditions, the main hydraulic control configuration performs the tilting and lifting of the wind-driven engagement unit.

[0025] The main hydraulic control configuration may comprise a user interface or communicate with a user interface. Personnel on the ship provide inputs to the main hydraulic control configuration via the user interface to tilt and lift the wind engaging unit.

[0026] The main hydraulic control configuration can control further aspects of the wind engaging unit and / or further aspects of the wind propulsion system.

[0027] The fact that the bypass configuration is separated from the main hydraulic control configuration means that hydraulic fluid can be led from the main hydraulic control configuration through the bypass configuration from a second pressure chamber. In other words, the flow of hydraulic fluid through the bypass configuration is independent of the main hydraulic control configuration. The main hydraulic control configuration does not control the flow of hydraulic fluid through the bypass configuration. The bypass configuration may be included in the same equipment frame as the main hydraulic control configuration but has components, piping, and / or controls separated from the main hydraulic control configuration.

[0028] Therefore, when the main hydraulic control configuration malfunctions, tilting of the wind engaging unit by the second tilting force is feasible because hydraulic fluid can be led from the second pressure chamber through the bypass configuration. That is, the hydraulic fluid in the second pressure chamber of the first hydraulic actuator needs to be guided from the second pressure chamber to tilt the wind engaging unit.

[0029] One or more hydraulic fluid conduits may be shared by the bypass configuration and the main hydraulic control configuration, but the hydraulic fluid flow control device of the bypass configuration is separated from the hydraulic fluid flow control device of the main hydraulic control configuration.

[0030] As previously stated, the second tilting force is generated independently of the main hydraulic control configuration. For example, the second tilting force may include force components generated by natural forces, such as gravity, aerodynamic forces such as wind or headwinds, and ship motion generated by waves. The second tilting force may also include force components generated by hydraulics or machinery, such as by a hydraulic pump separated from the main hydraulic control configuration, by a hydraulic or mechanical jack, or by a winch.

[0031] Therefore, in some embodiments, the second tilting force can be generated independently of the first hydraulic actuator. In other embodiments, the second tilting force can be generated at least partially by the first hydraulic actuator, although it is still independent of the main hydraulic control configuration.

[0032] The wind-powered engagement unit or at least a portion thereof may be movable in addition to being tiltable. For example, the wind-powered propulsion system may have a base, and the wind-powered engagement unit or a portion thereof may be displaceable relative to the base. For example, the wind-powered engagement unit or a movable portion thereof may be displaceable relative to the base in order to control the direction and / or magnitude of the thrust force generated by the wind-powered engagement unit. Such displacement relative to the base may be controlled by a main hydraulic control configuration.

[0033] The wind-driven engagement unit may include a wing sail, which may comprise a main wing sail having an airfoil shape and flaps having airfoil shapes. Optionally, the wing sail may have two or more flaps.

[0034] In this embodiment, the first hydraulic actuator controls the tilt of the entire wing sail.

[0035] Further hydraulic actuators may be provided to control the position of the flaps relative to the main wing sail. Such further hydraulic actuators may be controlled by the main hydraulic control configuration.

[0036] Such further hydraulic actuators may be, for example, hydraulic cylinders or hydraulic motors.

[0037] Further features and advantages of the present invention will become apparent when considering the appended claims and the following detailed description.

[0038] Various aspects and / or embodiments of the present invention, including their specific features and advantages, will be readily apparent from the example embodiments discussed in the following detailed description and accompanying drawings. [Brief explanation of the drawing]

[0039] [Figure 1a] This is a diagram of a ship according to an embodiment. [Figure 1b] This is a diagram of a ship according to an embodiment. [Figure 2] This is a schematic diagram of a portion of a wind power propulsion system according to an embodiment. [Figure 3a] This is a schematic top view of the wind power engagement unit. [Figure 3b] This is a schematic top view of the wind power engagement unit. [Figure 3c] This is a schematic top view of the wind power engagement unit. [Figure 3d] This is a schematic top view of the wind power engagement unit. [Modes for carrying out the invention]

[0040] Herein, aspects and / or embodiments of the present invention are described more fully. Similar reference numerals refer to similar elements from beginning to end. Well-known functions or structures are not necessarily described in detail for the sake of brevity and / or clarity.

[0041] Figures 1a and 1b show a vessel 2 according to an embodiment. Figure 1b shows the bow end of the vessel 2.

[0042] The vessel 2 comprises a wind propulsion system 4 according to any one of the embodiments and / or models discussed herein, particularly with reference to Figures 2 to 4.

[0043] The vessel 2 may be equipped with two or more wind propulsion systems. In the illustrated embodiment, the vessel 2 is equipped with three wind propulsion systems 4, 4', and 4''. The wind propulsion systems 4, 4', and 4'' may be of the same type or different types.

[0044] Vessel 2 may be equipped with one or two wind power propulsion systems, or fewer than three wind power propulsion systems, or more than three wind power propulsion systems, such as in the range of four to twelve wind power propulsion systems.

[0045] The wind propulsion system 4 comprises a wind engagement unit 6, a first hydraulic actuator 8 (see Figure 1b), and a main hydraulic control configuration 10 for controlling the first hydraulic actuator 8. The first hydraulic actuator 8 is positioned to generate a first tilting force for tilting the wind engagement unit 6. The first tilting force is generated by the first hydraulic actuator 8 under the control of the main hydraulic control configuration 10.

[0046] The wind power engagement unit 6 is located on the deck structure of the ship 2.

[0047] The main hydraulic control configuration 10 is schematically shown in Figures 1a and 1b. The first hydraulic actuator 8 and the main hydraulic control configuration 10 are discussed in more detail later with reference to Figure 2.

[0048] In Figure 1a, the wind-powered engagement unit 6 is shown in an upright or raised position. The upright or raised position of the wind-powered engagement unit 6 may be an effective position where the wind-powered engagement unit 6 is positioned to contribute to the propulsion of the vessel 2. According to some embodiments, the wind-powered engagement unit 6 may also be positioned in an ineffective manner, i.e., not contributing to the propulsion of the vessel 2, even in the upright position.

[0049] In Figure 1b, the wind-powered engagement unit 6 is shown in an inclined position. The inclined position may be substantially horizontal, or substantially parallel to the extension of the ship's hull or deck. The inclined position of the wind-powered engagement unit 6 is an ineffective position in which the wind-powered engagement unit 6 does not contribute, at least to a significant degree, to the propulsion of the ship 2.

[0050] When the substantially horizontal position is viewed projected onto a vertical plane extending between the bow and stern of the ship 2, the longitudinal axis L of the wind engagement unit 6 is positioned at an angle within ±15 degrees with respect to the waterline W of the ship 2.

[0051] The wind propulsion system 4 is configured for the tilting of the wind engagement unit 6, which utilizes a second tilting force generated independently of the main hydraulic pressure control configuration 10.

[0052] In the illustrated embodiment, the wind engagement unit 6 is a wing sail 6'. However, according to an alternative embodiment, the wind engagement unit 6 may be a rotor sail, turbo sail, or similar device comprising one or more rigid components that can be tilted by a first hydraulic actuator.

[0053] A rotor sail can utilize the so-called Magnus effect and may, for example, be equipped with a Flettner rotor. A turbo sail is sometimes called a suction sail. Other similar devices may be equipped with, for example, a wind turbine.

[0054] The wing sail 6' comprises a main wing sail 12 having an airfoil shape and a flap 14 having an airfoil shape.

[0055] Therefore, in some embodiments, the wind-powered engagement unit 6 may comprise a main member 12 and an auxiliary member 14, as shown in the illustrated embodiment. The wind-powered propulsion system 4 includes a second hydraulic actuator positioned to generate a first moving force for moving the auxiliary member 14 relative to the main member 12, as will be seen later with reference to Figure 2.

[0056] The main hydraulic control configuration 10 is arranged to control the second hydraulic actuator. For example, the main hydraulic control configuration 10 is configured to control the second hydraulic actuator to generate a first moving force.

[0057] The wind propulsion system 4 is configured to move the auxiliary member 14 relative to the main member 12 by utilizing a second moving force that is generated independently of the main hydraulic pressure control configuration 10.

[0058] The first hydraulic actuator 8 controls the tilt of the entire wing sail 6', that is, the tilt of the entire wing sail 6' including the main member / main wing sail 12 and the auxiliary member / flap 14.

[0059] Figure 2 schematically shows a portion of the wind power propulsion system 4 according to an embodiment.

[0060] The wind propulsion system 4 in the embodiment of Figure 2 is very similar to the wind propulsion system 4 in the embodiments of Figures 1a and 1b. Therefore, the above considerations for the embodiments of Figures 1a and 1b should also be referred to.

[0061] Here too, propulsion system 4 can be included in the category of a ship.

[0062] Here too, the wind propulsion system 4 comprises a wind engagement unit 6, a first hydraulic actuator 8, and a main hydraulic control configuration 10 for controlling the first hydraulic actuator 8. The first hydraulic actuator 8 is positioned to generate a first tilting force to tilt the wind engagement unit 6 under the control of the main hydraulic control configuration 10.

[0063] The first hydraulic actuator 8 may be a hydraulic cylinder. Therefore, a tilting system for tilting a wind-powered engagement unit, which includes a hydraulic actuator, is known. Thus, a further detailed examination of the components of the tilting system is not necessary here.

[0064] Here too, the wind propulsion system 4 is configured for the inclination of the wind engagement unit 6, which utilizes a second inclination force generated independently of the main hydraulic pressure control configuration 10.

[0065] Here too, the wind-powered engagement unit 6 comprises a main member 12, an auxiliary member 14, and a second hydraulic actuator 18 that generates a first moving force to move the auxiliary member 14 relative to the main member 12 under the control of the main hydraulic control configuration 10.

[0066] Tank 16 is provided for receiving the hydraulic fluid and for supplying the hydraulic fluid to the hydraulic components of the propulsion system 4.

[0067] The main hydraulic control configuration 10 includes, at least, a hydraulic pump, valves for controlling the flow of hydraulic fluid to the first hydraulic actuator 8 and the second hydraulic actuator 18, and the flow of hydraulic fluid from the first hydraulic actuator 8 and the second hydraulic actuator 18, as well as various hydraulic components, such as electronic control logic 20 for controlling various hydraulic components.

[0068] The hydraulic pump pressurizes a hydraulic fluid, such as hydraulic oil, which is directed to or from the first hydraulic actuator 8 and the second hydraulic actuator 18, through the main hydraulic control configuration 10 under the control of a valve.

[0069] Valves for controlling the flow of hydraulic fluid may include so-called counterbalancing valves 21, 23, 24, 25, or other corresponding load-holding hydraulic configurations, configured to maintain back pressure in hydraulic fluid piping connected to or from the first actuator 8 and the second actuator 18, in order to prevent loss of control over loads in the hydraulic actuators, that is, to maintain the set positions of the wind engagement unit 6 and / or auxiliary member 14 during use of the propulsion system 4.

[0070] The electronically controlled logic 20 comprises one or more computing devices that can take the form of substantially any suitable type of processing circuit or microcomputer, such as a digital signal processing circuit (DSP), a central processing unit (CPU), a processing unit, a processing circuit, a processor, an application-specific integrated circuit (ASIC), a microprocessor, or other processing logic, which can interpret and execute instructions. The formula computing devices used herein may represent processing circuits comprising multiple processing circuits, such as any, some, or all of those described above. The electronically controlled logic 20 may include a memory device. The computing device is connected to the memory device, which provides the computing device with stored program code and / or stored data that the computing device needs to enable the computing device to perform calculations, for example. The computing device may be adapted to store some or the final results of calculations in the memory device. The memory device may comprise a physical device used to store data or programs, i.e., a set of instructions, on a temporary or permanent basis.

[0071] The electronic control logic 20 is connected in particular to valves (not shown) to control the flow of hydraulic fluid to and from the first hydraulic actuator 8 and the second hydraulic actuator 18. The electronic control logic 20 may have or be able to communicate with a user interface 22. The user interface 22 may be located on the bridge of the vessel for staff to control the wind propulsion system 4. The electronic control logic 20 and / or the user interface 22 may be connected to remote control via satellite, mobile network, or internet connection.

[0072] More specifically, the first hydraulic actuator 8 comprises a first pressure chamber 26 for receiving hydraulic fluid to generate a first inclination force, and a second pressure chamber 28 for receiving hydraulic fluid to generate a force opposite to the first inclination force. The main hydraulic control configuration 10 is configured to direct the hydraulic fluid into or out of the first pressure chamber 26 and the second pressure chamber 28.

[0073] The direction of the first tilting force is indicated by a broad arrow in the first hydraulic actuator 8. According to some embodiments, the second tilting force is also in the direction of the broad arrow.

[0074] When applied, each of the first and second tilting forces tilts the wind-powered engagement unit 6. When the wind-powered engagement unit 6 is tilted, the hydraulic fluid needs to be released from the second pressure chamber 28.

[0075] When the first tilting force is generated by the first hydraulic actuator 8 under the control of the main hydraulic control configuration 10, the main hydraulic control configuration 10 also directly or indirectly controls the associated counterbalance valve 23 by initializing the pressure difference according to the type of counterbalance valve in order to release the hydraulic fluid from the second pressure chamber 28.

[0076] The wind propulsion system 4 further comprises a bypass configuration 30 connected to a second pressure chamber 28. The bypass configuration 30 is separated from the main hydraulic pressure control configuration 10.

[0077] More specifically, the bypass configuration 30 bypasses at least the counterbalance valve 23 or other load-holding hydraulic configuration of the main hydraulic control configuration 10, which is connected to the second pressure chamber 28.

[0078] The bypass configuration 30 is configured to guide the hydraulic fluid from the second pressure chamber 28 when tilting the wind power engagement unit 6 using a second tilting force generated independently of the main hydraulic pressure control configuration 10.

[0079] The wind propulsion system 4 may include additional hydraulic tilt actuators for tilting the wind engagement unit 6. Such additional hydraulic tilt actuators may be controlled in a manner similar to those disclosed herein, with reference to the first hydraulic actuator 8.

[0080] Contrary to the illustrated embodiment, the alternative first hydraulic actuator may be extended to tilt the wind-powered engagement unit, or it may be retracted to lift the wind-powered engagement unit 6. In such embodiments, the bypass configuration 30 would function in the corresponding manner.

[0081] According to some embodiments, such as the illustrated embodiment, the bypass configuration 30 comprises a second pressure chamber 28, a hydraulic passage 32 connecting to a tank 16 for hydraulic fluid, and a controllable valve 34 located in the hydraulic passage 32, the controllable valve 34 being configured to open and close the hydraulic passage 32. In this method, the bypass configuration 30 may be configured to guide the hydraulic fluid out of the second pressure chamber 28 when the wind-driven engagement unit 6 is tilted using the second tilting force.

[0082] The controllable valve 34 can be controlled independently of the main hydraulic pressure control configuration 10.

[0083] The controllable valve 34 may be controlled manually, for example, by turning a lever or a knob. Alternatively, as shown in the figure, the controllable valve 34 may be controlled via an autonomous control configuration 36. The autonomous control configuration 36 can also be operated by emergency power, such as a battery or a separately powered generator. Thus, personnel can operate the autonomous control configuration 36 to tilt the wind-powered engagement unit 6.

[0084] Furthermore, the controllable valve 34 may be adjustable between a closed position and an open position to control, for example, the flow of hydraulic fluid through the hydraulic passage 32.

[0085] Since the wind propulsion system 4 is configured to tilt the wind engagement unit 6 using a second tilting force generated independently of the main hydraulic pressure control configuration 10, the hydraulic pump of the main hydraulic pressure control configuration 10 is not required to tilt the wind engagement unit 6 if the main hydraulic pressure control configuration 10 malfunctions.

[0086] According to some embodiments, such as the illustrated embodiment, the hydraulic passage 32 includes or forms a flow restrictor 38, which limits the maximum flow rate of hydraulic fluid through the hydraulic passage 32 such that the hydraulic pressure in the second pressure chamber 28 generates a hydraulic pressure opposite to the second tilting force in order to limit the tilting speed of the wind-powered engagement unit 6. In this method, the wind-powered engagement unit 6 can be prevented from tilting at an uncontrollable speed even though the tilt is not controlled by the main hydraulic control configuration 10 if the main hydraulic control configuration 10 malfunctions.

[0087] Therefore, in other words, the tilting movement of the wind-engaged unit 6 caused by the second tilting force is restricted.

[0088] One or more hydraulic fluid pipes or conduits may be shared by the bypass configuration 30 and the main hydraulic control configuration 10, but the hydraulic fluid flow control devices of the bypass configuration 30, such as the controllable valve 34 and the flow restrictor 38, are separated from the hydraulic fluid flow control devices of the main hydraulic control configuration 10, such as the counterbalance valve 23 and the hydraulic pump.

[0089] According to some embodiments, the second gradient force may include a gravitational force component.

[0090] For example, when the wind-powered engagement unit 6 begins to tilt, and the center of gravity of the wind-powered engagement unit 6 is pivoted beyond the pivot axis around which the wind-powered engagement unit 6 is pivoted, gravity can become a force that tilts the wind-powered engagement unit 6 to its inactive position.

[0091] A further alternative may be that, as gravity tilts the wind-engaging unit 6, the ship, following the waves at sea, positions the center of gravity of the wind-engaging unit 6 to the side of its pivot axis.

[0092] According to some embodiments, the second gradient force may include an aerodynamic force component.

[0093] For example, wind blowing on the wind-powered engagement unit 6 can exert a force on it that will contribute at least partially to the tilt of the wind-powered engagement unit 6. The wind can, for example, initiate the tilt of the wind-powered engagement unit 6, and gravity can also contribute to the tilt after the initial tilting motion.

[0094] The wind blowing onto the wind-engaging unit 6 can be a headwind because the ship is propelled by further propulsion devices, such as the combustion engines that drive the propellers. Alternatively, the ship can turn into the true wind so that the true wind blows onto the wind-engaging unit 6. The headwind can also be called the apparent wind, that is, the wind is actually experienced by the wind-engaging unit 6 and is defined by adding the motion of the ship 1 (speed, heading, rolling, etc.) to the true wind.

[0095] Alternatively, the tilting movement of the wind-engaged unit 6 may be initiated through a capsizing moment generated by the motion of the vessel, that is, through an eccentric inertial force acting on the wind-engaged unit 6 due to the motion of the vessel.

[0096] According to some embodiments, the wind propulsion system 4 may include a hydraulic pump 40 separated from the main hydraulic control configuration 10, the hydraulic pump 40 being configured to supply a hydraulic fluid to the first pressure chamber 26 in order to generate a second tilt force.

[0097] In this method, if, for example, the main hydraulic pressure control configuration 10 malfunctions, personnel can start a hydraulic pump 40 that is separated from the main hydraulic pressure control configuration 10 in order to generate a second gradient force.

[0098] According to some embodiments, such as the illustrated embodiment, the wind-powered engagement unit 6 comprises a main member 12 and an auxiliary member 14. The wind-powered propulsion system 4 comprises a second hydraulic actuator 18 positioned to generate a first propulsion force for moving the auxiliary member 14 relative to the main member 12. The second hydraulic actuator 18 comprises a third pressure chamber 42 for receiving hydraulic fluid to generate the first propulsion force and a fourth pressure chamber 44 for receiving hydraulic fluid to generate a force opposite to the first propulsion force. The main hydraulic control configuration 10 is configured to direct the hydraulic fluid to and from the third and fourth pressure chambers 42 and 44. The wind-powered propulsion system 4 further comprises a further bypass configuration 46 connected to the fourth pressure chamber 44, the further bypass configuration 46 being separated from the main hydraulic control configuration 10. The wind propulsion system 4 is configured to move the auxiliary member 14 relative to the main member 12 by utilizing a second moving force generated independently of the main hydraulic pressure control configuration 10. A further bypass configuration 46 is configured to guide the hydraulic fluid from the fourth pressure chamber 44 when the auxiliary member 14 is moved using the second moving force. In this method, the auxiliary member 14 can be moved relative to the main member 12 independently of the main hydraulic pressure control configuration 10. Therefore, the auxiliary member 14 can be moved relative to the main member 12 even if the main hydraulic pressure control configuration 10 is malfunctioning.

[0099] When the first moving force is generated by the second hydraulic actuator 18 under the control of the main hydraulic control configuration 10, the main hydraulic control configuration 10 also controls the associated counterbalance valve 24 or other hydraulic configuration holding a corresponding load in order to expel the hydraulic fluid from the fourth pressure chamber 44.

[0100] The direction of the first moving force is indicated by a broad arrow in the second hydraulic actuator 18. According to some embodiments, the second moving force is also in the direction of the broad arrow.

[0101] A further bypass configuration 46 is separated from the main hydraulic control configuration 10 and configured to guide the hydraulic fluid from the fourth pressure chamber 44. Therefore, if the main hydraulic control configuration 10 malfunctions, the hydraulic fluid can be guided from the fourth pressure chamber 44 when the second moving force is used to move the auxiliary member 14 relative to the main member 12. Consequently, the main hydraulic control configuration 10 is not required to guide the hydraulic fluid from the fourth pressure chamber 44.

[0102] More specifically, the further bypass configuration 46 bypasses at least the counterbalance valve 24 or other corresponding load-holding hydraulic configuration of the main hydraulic control configuration 10 connected to the fourth pressure chamber 44.

[0103] For example, if the wind-powered engagement unit 6 is equipped with a wing sail 6', its flap 14 may be folded relative to the main wing sail 12 in order to prepare the wing sail 6' for its inclination. More broadly speaking, the auxiliary member 14 may be moved relative to the main member 12. Such movement can be achieved by a first moving force and a second moving force. Under normal operating conditions, the first moving force is controlled by the main hydraulic control configuration 10. If the main hydraulic control configuration 10 malfunctions, the second moving force is used to move the auxiliary member 14 relative to the main member 12.

[0104] According to some embodiments, the second mobile force may include an aerodynamic force component.

[0105] For example, wind blowing on the auxiliary member 14 can exert a force on the auxiliary member 14 that contributes at least partially to the bending of the auxiliary member relative to the main member 12. The wind can initiate the bending of the auxiliary member 14, and gravity can also contribute to the bending during the tilting movement of the entire wind-engaged unit 6, as will be seen later.

[0106] The wind blowing on the wind-engaging unit 6 may be a headwind, as the ship is propelled by further propulsion devices, such as a combustion engine driving a screw. Alternatively, the wind-engaging unit 6 as a whole may be pivotable around a vertical axis (not shown) so that the aerodynamic force component provided by the wind blowing at sea can be utilized to bend the auxiliary member 14 relative to the main member 12. A further alternative is that the ship may turn into the true wind so that the true wind blows onto the auxiliary member 14, for example, to bend the auxiliary member 14 relative to the main member 12.

[0107] For how the second moving force, including aerodynamic forces, is used to fold the auxiliary member 14 relative to the main member 12, please refer to Figures 3a to 3d and also see below.

[0108] According to some embodiments, the second propulsion force may include a gravitational force component.

[0109] For example, if the auxiliary member 14 is angled toward the main member 12, and configured to bend toward that side, then the partially or fully inclined position of the wind engagement unit 6 will cause gravity to bend the auxiliary member 14 toward the main member 12. In other words, the center of gravity of the auxiliary member 14 is positioned lateral to the pivot axis around which the auxiliary member 14 pivots.

[0110] According to some embodiments, such as the illustrated embodiment, the further bypass configuration 46 comprises a further hydraulic passage 48 connecting the fourth pressure chamber 44 to a tank 16 for the hydraulic fluid, and a further controllable valve 50 located in the further hydraulic passage 48, the further controllable valve 50 being configured to open and close the further hydraulic passage 48. In this method, the further bypass configuration 46 may be configured to guide the hydraulic fluid out of the fourth pressure chamber 44 when the auxiliary member 14 is moved relative to the main member 12, such as by using a second moving force to bend the auxiliary member 14 relative to the main member 12.

[0111] The additional controllable valve 50 can be controlled independently of the main hydraulic pressure control configuration 10.

[0112] Further controllable valves 50 may be controlled manually, for example, by turning a lever or a knob. Alternatively, as shown in the figure, further controllable valves 50 may be controlled via an autonomous control configuration 36. Thus, personnel may operate the autonomous control configuration 36 to move the auxiliary member 14 relative to the main member 12.

[0113] Furthermore, additional controllable valves 50 may be adjustable between a closed position and an open position to control, for example, the flow of hydraulic fluid through an additional hydraulic passage 48.

[0114] Since the wind propulsion system 4 is configured to move the auxiliary member 14 relative to the main member 12 using a second moving force generated independently of the main hydraulic pressure control configuration 10, the hydraulic pump of the main hydraulic pressure control configuration 10 is not required to move the auxiliary member 14 relative to the main member 12 if the main hydraulic pressure control configuration 10 malfunctions.

[0115] According to some embodiments, such as the illustrated embodiment, the further hydraulic passage 48 comprises or forms a flow restrictor 52, which limits the maximum flow rate of the hydraulic fluid through the further hydraulic passage 48 such that the hydraulic pressure in the fourth pressure chamber 44 generates a hydraulic pressure opposite to the second moving force in order to limit the speed of movement of the auxiliary member 14. In this method, the auxiliary member 14 can be prevented from moving at an uncontrollable speed even though the movement of the auxiliary member 14 relative to the main member 12 is not controlled by the main hydraulic control configuration 10 when the main hydraulic control configuration 10 is malfunctioning.

[0116] In other words, the speed at which the auxiliary member 14 moves, brought about by the second moving force, is limited.

[0117] One or more hydraulic fluid pipes or conduits may be shared by a further bypass configuration 46 and the main hydraulic control configuration 10, but hydraulic fluid flow control devices of the further bypass configuration 46, such as further controllable valves 50 and flow restrictors 52, are separated from hydraulic fluid flow control devices of the main hydraulic control configuration 10, such as counterbalance valves 24 or other corresponding load-holding hydraulic configurations and hydraulic pumps.

[0118] According to some embodiments, such as the illustrated embodiment, the bypass configuration 30 includes a branch conduit 54 connected to the third pressure chamber 42 to generate a second moving force by directing the hydraulic fluid from the second pressure chamber 28 of the first hydraulic actuator 8 to the third pressure chamber 42 of the second hydraulic actuator 18. In this method, when the wind-engaged unit 6 is tilted using the second tilting force and the hydraulic fluid is guided through the bypass configuration 30, the hydraulic fluid can be directed to the second hydraulic actuator 18 and its third pressure chamber 42 to generate a second moving force via the second hydraulic actuator 18, independently of the main hydraulic control configuration 10.

[0119] An additional controllable valve 56 may be positioned in the branch conduit 54 to direct the hydraulic fluid through the branch conduit 54. Preferably, the branch conduit 54 is connected upstream of the controllable valve 34 to the rest of the bypass configuration 30 so that the flow of hydraulic fluid through the branch conduit 54 is also controllable by the controllable valve 34.

[0120] The bypass configuration 30 can be connected to the first pressure chamber 26 of the first hydraulic actuator 8. The conduit 58 can form part of the connection between the hydraulic passage 32 and the first pressure chamber 26. Thus, when the wind-driven engagement unit 6 is tilted using the second tilting force, the hydraulic fluid can be drawn from the bypass configuration 30 into the first pressure chamber 26.

[0121] Similarly, a further bypass configuration 46 may be connected to a third pressure chamber 42 of the second hydraulic actuator 18. A further conduit 60 may form part of the connection between the further hydraulic passage 48 and the third pressure chamber 42. Thus, when the auxiliary member 14 is moved relative to the main member 12 using the second moving force, the hydraulic fluid can be drawn from the further bypass configuration 46 into the third pressure chamber 42.

[0122] According to some embodiments, the wind propulsion system 4 may include an additional hydraulic pump 41 separated from the main hydraulic control configuration 10, the additional hydraulic pump 41 being configured to supply hydraulic fluid to a third pressure chamber 42 in order to generate a second inclination force.

[0123] In this method, if, for example, the main hydraulic pressure control configuration 10 malfunctions, personnel can start an additional hydraulic pump 41, which is separated from the main hydraulic pressure control configuration 10, to generate a second gradient force.

[0124] When the main hydraulic control configuration 10 is controlling the first hydraulic actuator 8 and the second hydraulic actuator 18, check valves may be provided to prevent the hydraulic fluid from flowing to the bypass configuration 30 and the further bypass configuration 46. For example, as shown in the figure, check valves may be located in the branch conduit 54, conduit 58, and further conduit 60.

[0125] Figures 3a to 3d schematically show the top view of the wind power engagement unit 6.

[0126] Figures 3a to 3d show a series of folds of the auxiliary member 14 relative to the main member 12 of the wind power engagement unit 6.

[0127] The wind-engaged unit 6 may be a wing sail 6', as discussed above. Therefore, the main member 12 may be a main wing sail 12, and the auxiliary member 14 may be a flap 14. A second hydraulic actuator 18 is directed to move the auxiliary member 14 relative to the main member 12.

[0128] In each of Figures 3a to 3d, the wind direction is indicated by three arrows. The figures show how the second moving force, as an aerodynamic force component, can be used to bend the auxiliary member 14 relative to the main member 12.

[0129] Wind contributes to the aerodynamic force component. Figures 3a to 3d show how wind blows onto the auxiliary member 14 when the wind-engaged unit 6 is rotated. The wind-engaged unit 6 can be rotated by a dedicated mechanism. Alternatively, the ship supporting the wind-engaged unit 6 may be steered so that the wind-engaged unit 6 is rotated relative to the wind.

[0130] The second moving force extends the second hydraulic actuator 18 until the auxiliary member 14 is bent relative to the main member 12.

[0131] It will be understood that the foregoing is illustrative of various examples of embodiments and that the present invention is defined solely by the appended claims. Those skilled in the art will understand that the exemplary embodiments may be modified and that different features of the exemplary embodiments may be combined to create embodiments other than those described herein without departing from the scope of the present invention as defined in the appended claims. [Explanation of symbols]

[0132] 2 ships 4, 4', 4" force propulsion system 6 Wind-powered engagement unit 6' Wing Sail 8. First hydraulic actuator 10 Main hydraulic pressure control configuration 12. Main wing sail, main components 14. Flap, auxiliary member 16 tanks 18. Second hydraulic actuator 20 Electronic Control Logic 21, 23, 24, 25 Counterbalance valve 22 User Interface 26 First pressure chamber 28. Second pressure chamber 30 Bypass Configuration 32 Hydraulic passage 34 Controllable valves 36 Autonomous control configuration 38 Flow Control Section 40 Hydraulic pump 41. Further hydraulic pumps 42 Third pressure chamber 44. The fourth pressure chamber 46 Further bypass configurations 48 Further hydraulic passages 50 Further controllable valves 52 Flow control section 54 Branch conduit 56 Additional controllable valves 58 Conduit 60 Further conduits L Longitudinal axis W water line

Claims

1. A wind-powered propulsion system (4) comprising a wind-powered engagement unit (6), a first hydraulic actuator (8) arranged to generate a first tilting force for tilting the wind-powered engagement unit (6), and a main hydraulic control configuration (10) for controlling the first hydraulic actuator (8), The first hydraulic actuator (8) comprises a first pressure chamber (26) for receiving hydraulic fluid to generate the first inclination force, and a second pressure chamber (28) for receiving hydraulic fluid to generate a force opposite to the first inclination force, The main hydraulic pressure control configuration (10) is configured to direct the hydraulic fluid toward or toward the first and second pressure chambers (26, 28), The wind propulsion system (4) further comprises a bypass configuration (30) connected to the second pressure chamber (28), and the bypass configuration (30) is separated from the main hydraulic pressure control configuration (10). The wind power propulsion system (4) is configured for the inclination of the wind power engagement unit (6) which utilizes a second inclination force generated independently of the main hydraulic pressure control configuration (10), The bypass configuration (30) is configured to guide the hydraulic fluid from the second pressure chamber (28) when the wind-powered engagement unit (6) is tilted using the second tilting force, in the wind-powered propulsion system (4).

2. The wind propulsion system (4) according to claim 1, wherein the bypass configuration (30) comprises a hydraulic passage (32) connecting the second pressure chamber (28) to a tank (16) for a hydraulic fluid, and a controllable valve (34) positioned in the hydraulic passage (32), the controllable valve (34) being configured to open and close the hydraulic passage (32).

3. The wind propulsion system (4) according to claim 2, wherein the hydraulic passage (32) comprises or forms a flow restricting section (38) which limits the maximum flow rate of the hydraulic fluid through the hydraulic passage (32) such that the hydraulic pressure in the second pressure chamber (28) generates a hydraulic pressure opposite to the second tilting force in order to limit the tilting speed of the wind power engagement unit (6).

4. The wind power engagement unit (6) comprises a main member (12) and an auxiliary member (14), The wind propulsion system (4) includes a second hydraulic actuator (18) positioned to generate a first moving force for moving the auxiliary member (14) relative to the main member (12), The second hydraulic actuator (18) comprises a third pressure chamber (42) for receiving hydraulic fluid to generate the first moving force, and a fourth pressure chamber (44) for receiving hydraulic fluid to generate a force opposite to the first moving force, The main hydraulic pressure control configuration (10) is configured to direct the hydraulic fluid toward or toward the third and fourth pressure chambers (42, 44), The wind propulsion system (4) further comprises a further bypass configuration (46) connected to the fourth pressure chamber (44), the further bypass configuration (46) being separated from the main hydraulic pressure control configuration (10), The wind propulsion system (4) is configured to move the auxiliary member (14) relative to the main member (12) by utilizing a second moving force that is generated independently of the main hydraulic pressure control configuration (10). The wind propulsion system (4) according to any one of claims 1 to 3, wherein the further bypass configuration (46) is configured to guide a hydraulic fluid from the fourth pressure chamber (44) when the auxiliary member (14) is moved using the second moving force.

5. The wind propulsion system (4) according to claim 4, wherein the further bypass configuration (46) comprises a further hydraulic passage (48) connecting the fourth pressure chamber (44) to a tank (16) for a hydraulic fluid, and a further controllable valve (50) positioned in the further hydraulic passage (48), the further controllable valve (50) being configured to open and close the further hydraulic passage (48).

6. The wind propulsion system (4) according to claim 5, wherein the further hydraulic passage (48) comprises or forms a flow restrictor (52) which limits the maximum flow rate of the hydraulic fluid through the further hydraulic passage (48) such that the hydraulic pressure in the fourth pressure chamber (44) generates a hydraulic pressure opposite to the second moving force in order to limit the speed of movement of the auxiliary member (14).

7. The wind propulsion system (4) according to any one of claims 4 to 6, wherein the bypass configuration (30) includes a branch conduit (54) connected to the third pressure chamber (42) in order to generate the second propulsion force by directing the hydraulic fluid from the second pressure chamber (28) of the first hydraulic actuator (8) to the third pressure chamber (42) of the second hydraulic actuator (18).

8. The wind propulsion system (4) according to any one of claims 4 to 7, wherein the second propulsion force includes an aerodynamic force component.

9. The wind propulsion system (4) according to any one of claims 4 to 8, wherein the second propulsion force includes a gravitational force component.

10. The wind propulsion system (4) according to any one of claims 4 to 9, wherein the second tilting force includes a gravitational force component.

11. The wind propulsion system (4) according to any one of claims 4 to 10, wherein the second tilting force includes an aerodynamic force component.

12. The wind propulsion system (4) includes a hydraulic pump (40) that is separated from the main hydraulic control configuration (10), The wind propulsion system (4) according to any one of claims 1 to 11, wherein the hydraulic pump (40) is configured to supply a hydraulic fluid to the first pressure chamber (26) in order to generate the second tilting force.

13. The wind propulsion system (4) includes a further hydraulic pump (41) separated from the main hydraulic control configuration (10), The wind propulsion system (4) according to any one of claims 4 to 9, wherein the further hydraulic pump (41) is configured to supply a hydraulic fluid to the third pressure chamber (42) in order to generate the second propulsion force.

14. The wind-powered engagement unit (6) comprises or consists of a wing sail (6'), a rotor sail, a turbo sail, or a similar device, according to any one of claims 1 to 13, the wind-powered propulsion system (4).

15. A vessel (2) equipped with a wind power propulsion system (4) according to any one of claims 1 to 14.

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