Energy saving combination and ship comprising same

Abstract

The application discloses an energy-saving combined device and a ship comprising the same, which comprises a plurality of first flow guides arranged at intervals and at least one second flow guide, each of the first flow guides is arranged along the radial direction of a propeller, the second flow guide is arranged along the circumferential arc of a stern, at least part of the second flow guide is arranged at the front end of the first flow guide in a first direction, and at least part of the first flow guide is located in the corresponding angular range of the arc-shaped extension of the second flow guide; the second flow guide comprises a first side and a second side arranged in the first direction in sequence, and the first side and / or the second side is arranged obliquely relative to the radial surface of the propeller. The energy-saving combined device and the ship comprising the same reduce the separation of the water flow at the tail of the ship body, improve the uniformity of the flow field in front of the propeller, make the propeller generate greater thrust, improve the propelling efficiency of the ship, and improve the energy-saving effect. Moreover, the two flow guides are simple in structure and easy to manufacture, and the processing and installation costs are reduced.

Description

Technical Field

[0001] This invention relates to the technical field of ships, and particularly to an energy-saving combination device and a ship including the same. Background Technology

[0002] In the shipping industry, fuel cost is one of the main operating costs. Energy conservation and environmental protection are topics of common concern in the shipping industry, and they are becoming increasingly important under the EEDI (Energy Efficiency Design Index). At the stern of the ship, an energy-saving appendage device is usually installed in front of the propeller (where appendage refers to the energy-saving device being attached to the hull) to improve the matching with the propeller, improve propulsion efficiency, and achieve the goal of energy conservation and emission reduction.

[0003] However, in existing technologies, the energy-saving appendages in front of the propeller are either too simple to effectively improve propulsion efficiency, or their complex structure leads to complicated processing and installation, increasing ship manufacturing costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing energy-saving appendage devices in front of the ship propeller, which cannot effectively improve the ship's propulsion efficiency and whose complex structure leads to increased costs. The present invention provides an energy-saving combination device and a ship including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An energy-saving combination device is installed at the stern of a ship, and a propeller is also installed at the stern. At least a portion of the energy-saving combination device is located at the front end of the propeller along a first direction from the bow to the stern. The energy-saving combination device includes a plurality of first guide elements spaced circumferentially along the stern, and each first guide element extends radially along the propeller.

[0007] The energy-saving combination device further includes at least one second flow guide, which extends in a circumferential arc along the stern of the ship. At least a portion of the second flow guide is located at the front end of the first flow guide along the first direction, and at least a portion of the first flow guide is located within the angle range corresponding to the arc extension of the second flow guide.

[0008] The second guide includes a first side and a second side arranged sequentially in the first direction, wherein the first side and / or the second side are inclined relative to the radial surface of the propeller.

[0009] In this design, through the aforementioned energy-saving combination device, water flows from both sides of the hull towards the stern, passing sequentially through the second guide member and the first guide member in the first direction to the propeller. The inclined second guide member forms an angle with the incoming flow from the hull, reducing water separation at the stern and improving the uniformity of the flow field in front of the propeller. Compared to a single guide member or a non-inclined guide member, the combination of two guide members extending in different directions further generates water flow favorable to propeller propulsion, resulting in greater propeller thrust. This improves the compatibility with the propeller, enhances the ship's propulsion efficiency, and increases energy savings. Furthermore, the two guide members are manufactured separately, resulting in a simple structure, ease of manufacturing, and reduced processing and installation costs. The inclined, arc-shaped second guide member, compared to a straight guide member, reduces its volume, thereby lowering manufacturing costs.

[0010] Preferably, the propeller includes a vertical plane perpendicular to the radial plane and extending from the bottom of the ship to the deck, and the energy-saving assembly is positioned on the hull in the opposite direction to the direction of rotation of the propeller relative to the vertical plane.

[0011] In this design, the energy-saving device is positioned on the hull in the opposite direction to the propeller's rotation relative to the vertical plane. Specifically, if the propeller rotates clockwise, the energy-saving device is located on the left side of the vertical plane; if the propeller rotates counterclockwise, it is located on the right side. This arrangement allows water to flow from both sides of the hull towards the stern. As water passes through the energy-saving device, it generates a flow opposite to the propeller's rotation, which helps increase the propeller's thrust, thereby further improving the ship's propulsion efficiency and energy-saving effect.

[0012] Preferably, the second guide member further includes a third side and a fourth side respectively disposed at the starting end and the ending end of the rotation direction of the propeller; the third side and / or the fourth side are inclined relative to the axis of the propeller.

[0013] In this design, the third and fourth sides of the second guide are also inclined as described above, which further reduces the separation of water flow at the stern of the hull, improves the uniformity of the flow field in front of the propeller, and is conducive to improving propulsion.

[0014] Preferably, the inclination angle of the first side relative to the radial surface is a first inclination angle, and the inclination angle of the second side relative to the radial surface is a second inclination angle, wherein the first inclination angle is different from the second inclination angle.

[0015] And / or,

[0016] The tilt angle of the third side relative to the axis of the propeller is the third tilt angle, and the tilt angle of the fourth side relative to the axis of the propeller is the fourth tilt angle. The third tilt angle is different from the fourth tilt angle.

[0017] In this scheme, the first and second sides of the second guide member adopt the above-mentioned different tilt angles, and / or the third and fourth sides of the second guide member adopt the above-mentioned different tilt angles, which can achieve different angles with the incoming flow, thus more effectively reducing the separation of water flow at the stern of the hull, improving the uniformity of the flow field in front of the propeller, and helping to improve the propulsion force.

[0018] Preferably, the ratio of the diameter of the second guide member at different positions in the first direction to the diameter of the propeller matches the surface profile of the hull;

[0019] And / or, the ratio of the length of the third side and the fourth side along the propeller axis to the diameter of the propeller is matched with the surface profile.

[0020] In this design, the diameter of the arc-shaped second guide at different positions is adjusted in proportion to the propeller diameter, and / or the lengths of the third and fourth sides of the second guide are adjusted in proportion to the propeller diameter to achieve matching with the hull surface profile. This makes it easier to determine the diameter and length during manufacturing and reduces manufacturing difficulty.

[0021] Preferably, the first guide member includes a fifth side and a sixth side arranged sequentially along the first direction, and each of the first guide members is inclined about the sixth side as an axis and is inclined in the same direction relative to the radial surface of the propeller.

[0022] In this design, the first guide element is inclined in the same direction as described above, so that the water flow converges from both sides of the hull to the stern. When the water flows through the first guide element, it can generate a water flow that is opposite to the rotation of the propeller, which is beneficial to improving the propeller's propulsion force, thereby further improving the ship's propulsion efficiency and energy-saving effect.

[0023] Preferably, the inclination angle of the second side relative to the radial surface is a second inclination angle;

[0024] The first guide member includes a fifth side and a sixth side arranged sequentially along the first direction, and the fifth side has an inclination angle relative to the radial surface of a fifth inclination angle.

[0025] The difference between the second tilt angle and the fifth tilt angle does not exceed the set angle error.

[0026] In this scheme, the difference between the second and fifth tilt angles does not exceed the set angle error, so that the tilt angles of the second and fifth sides through which the water flows tend to be consistent, which is conducive to the smooth flow of water and makes it less likely for water flow to separate.

[0027] Preferably, the first distance between the endpoint of the first side along the path of rotation and the stern end face is set to match the surface profile of the second guide connecting to the hull;

[0028] Alternatively, the second distance between the endpoint of the first side along the path of the propeller's rotation direction and the bottom of the hull is set to match the surface profile of the second guide member where it connects to the hull.

[0029] In this scheme, the first distance is matched with the hull surface profile, and / or the second distance is matched with the hull surface profile, so as to better adjust the position of the second guide element according to the different hull surface profiles, so that the water flow curve changes smoothly, reduce water flow separation, improve the uniformity of the flow field in front of the propeller, and thus improve the propulsion force.

[0030] Preferably, the ratio of the first distance to the diameter of the propeller is a first ratio, the first ratio being matched with the surface profile, and the first ratio being in the range of 0.1 to 1.0;

[0031] And / or, the ratio of the second distance to the diameter of the propeller is a second ratio, the second ratio being matched with the surface profile, the second ratio being in the range of 0.3 to 0.7.

[0032] In this design, the position of the second guide component is determined by its proportional relationship with the propeller diameter. By adjusting the proportional size, the first distance, the second distance, and the hull surface lines are matched, which reduces the difficulty of adjustment to achieve the matching, makes it easier to process and install, and reduces costs.

[0033] A vessel comprising an energy-saving assembly as described above, the energy-saving assembly being mounted at the stern, and at least a portion of the energy-saving assembly being disposed at the front end of the propeller along a first direction from bow to stern.

[0034] In this scheme, the ship is equipped with the aforementioned energy-saving combination device, which reduces the separation of water flow at the stern of the hull, improves the uniformity of the flow field in front of the propeller, generates water flow that is beneficial to the propeller's propulsion, and enables the propeller to generate greater thrust; thereby improving the matching with the propeller, enhancing the ship's propulsion efficiency, and improving the energy-saving effect.

[0035] The positive and progressive effects of this invention are as follows: the energy-saving combination device and the ship including it, through the aforementioned inclined second guide member, reduce the separation of water flow at the stern of the hull and improve the uniformity of the flow field in front of the propeller. Furthermore, the cooperation of the two guide members extending in different directions further generates water flow that is beneficial to the propeller's propulsion, enabling the propeller to generate greater thrust; thereby improving the matching with the propeller, enhancing the ship's propulsion efficiency, and improving energy-saving effects. Moreover, the two guide members are manufactured separately, resulting in a simple structure, ease of manufacturing, and reduced processing and installation costs; the inclined arrangement of the arc-shaped second guide member, compared to a straight guide member, reduces the volume of the second guide member, thereby reducing production and manufacturing costs. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the energy-saving combination device installed at the stern of a ship according to an embodiment of the present invention (view 1).

[0037] Figure 2 This is a schematic diagram of the energy-saving combination device installed at the stern of a ship according to an embodiment of the present invention (viewpoint two).

[0038] Figure 3 This is a side view (showing dimensional relationships) of the second flow guide component according to an embodiment of the present invention.

[0039] Figure 4 This is a side view (showing the tilt angle) of the second guide member according to an embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the energy-saving combination device according to an embodiment of the present invention (view from the stern to the bow).

[0041] Figure 6 This is a schematic diagram of the propeller thrust curve when the ship is not equipped with the energy-saving combination device, according to an embodiment of the present invention.

[0042] Figure 7 This is a schematic diagram of the propeller thrust curve when the energy-saving combination device is installed on a ship according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] Hull 4

[0045] Stern 6

[0046] Propeller 3

[0047] Energy-saving combination device 7

[0048] First direction A

[0049] First guide component 2

[0050] First first guide element 2-1

[0051] Second first guide element 2-2

[0052] The third first guide element 2-3

[0053] Fifth side 21

[0054] Fifth tilt angle A3

[0055] Sixth side 22

[0056] Second flow guide 1

[0057] First side 11

[0058] The diameter D1 at the inlet of the second guide member

[0059] The diameter D2 at the outlet of the second guide component on the second side 12

[0060] Third side 13

[0061] The length L2 of the third side

[0062] Fourth side 14

[0063] The length L1 of the fourth side

[0064] First tilt angle A1

[0065] Second tilt angle A2′

[0066] Third tilt angle B2

[0067] The fourth tilt angle B1 and the direction of propeller rotation B

[0068] The direction from the stern to the bow is the X-axis; the direction from the center of the ship to the port side is the Y-axis.

[0069] The direction from the bottom of the ship to the deck is the Z-axis. Detailed Implementation

[0070] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0071] like Figure 1-7As shown, this embodiment provides an energy-saving combination device 7, and also provides a ship equipped with the energy-saving combination device 7. The energy-saving combination device 7 is installed at the stern of the hull 4, and is located at the front end of the propeller 3 at the stern 6 along a first direction A from the bow to the stern 6. "First direction A" is the direction in which water flows from the bow (not shown in the figure) to the stern 6 when the ship is moving forward, which is opposite to the direction of the ship's forward movement. "Front end" refers to the initial end of the first direction A, that is, the end closer to the bow. Generally, the shape of the hull 4 gradually tapers from both sides of the hull 4 towards the stern 6, therefore, the water flow also converges from both sides of the hull 4 to the stern 6 located in the middle.

[0072] In this embodiment, to better illustrate the position of the energy-saving combination device 7 on the hull 4, the rotation direction B of the propeller 3 is described as right-handed. A coordinate system with three mutually perpendicular directions (X, Y, and Z axes) is defined. The X-axis points from the stern 6 to the bow (i.e., the direction opposite to the first direction A), and the Y-axis points from the center of the ship to the left side ("left side" refers to the direction from the center of the ship to the left side). Figure 5 On the left side of the diagram, "midship" refers to the position parallel to both sides of the hull and located in the middle; the Z-axis is the direction from the bottom of the ship towards the deck. The X-axis is parallel to the axis of propeller 3, and the Y-axis and Z-axis also form the radial plane of propeller 3. The X-axis and Z-axis form the vertical plane of hull 4, which is perpendicular to the radial plane and parallel to the two sides of hull 4.

[0073] The energy-saving combination device 7 includes a plurality of first guide members 2 and at least one second guide member 1 arranged circumferentially along the stern 6. Each first guide member 2 extends radially along the propeller 3. The second guide member 1 extends circumferentially in an arc shape along the stern 6. At least a portion of the second guide member 1 is located at the front end of the first guide member 2 along a first direction, and at least a portion of the first guide member 2 is located within the angle range corresponding to the arc extension of the second guide member 1. The second guide member 1 includes a first side 11 and a second side 12 arranged sequentially in the first direction. The first side 11 and / or the second side 12 are inclined relative to the radial surface of the propeller 3.

[0074] Specifically, such as Figure 1 As shown, in this embodiment, the first guide element 2 is an airfoil blade, and the energy-saving combination device 7 includes three blades, all of which are welded to the conical surface of the stern 6; from Figure 5From a perspective of [the image / viewpoint], in order from left to right, the first first guide element 2-1 on the far left has an angle of 90° with the Z-axis, the second first guide element 2-2 has an angle of 50° with the Z-axis, and the third first guide element 2-3 on the far right has an angle of 20° with the Z-axis. In other embodiments, the number of first guide elements 2 can be adjusted accordingly based on different hull shapes 4 and the required flow guidance effect. Preferably, the number of first guide elements 2 is between 2 and 5. The shape of the first guide elements 2 can also be adjusted accordingly, and can be blade-shaped or fin-shaped, etc.

[0075] In this embodiment, considering manufacturing costs, the energy-saving combination device 7 includes only one second flow guide 1. Specifically, the second flow guide 1 is an arc-shaped structural component, welded to the conical surface of the stern 6. It extends in an arc shape around the circumference of the conical hull 4 at the stern 6 and is inclined relative to the radial surface of the propeller 3, with its circumferential surface appearing semi-circular or semi-elliptical. In other embodiments, depending on the different shapes of the hull 4 and the required flow guiding effect, the energy-saving combination device 7 with this design may also include multiple second flow guides 1. These multiple second flow guides 1 can be spaced apart along the circumference of the stern 6, or a single second flow guide 1 can extend in an arc along the circumference of the stern 6 to form a complete tubular structure. Therefore, this arc-extended and inclined second flow guide 1 is also called an inclined duct. The arc-shaped extension path of the second flow guide 1 can also be adjusted accordingly to meet the requirements of the flow guiding effect, and is not necessarily a regular circular structure.

[0076] In this embodiment, the second guide element 1, the first guide element 2, and the propeller 3 are arranged sequentially at intervals along the first direction A. The two guide elements can be processed and installed separately, reducing manufacturing difficulty and cost. In other embodiments, as needed, the first guide element 2 can also be partially overlapped with the propeller 3 along the first direction A, and the second guide element 1 can also be partially overlapped with the first guide element 2 along the first direction A.

[0077] In this embodiment, as Figure 5 As shown, the distribution of the three first guide elements 2 on the radial surface of the propeller 3 is basically within the angle range corresponding to the arc extension of the second guide element 1, so as to achieve a better matching effect between the two guide elements. In other embodiments, depending on the shape of the hull 4 and the need for the guiding effect, some of the first guide elements 2 may be located outside the angle range corresponding to the arc extension of the second guide element 1.

[0078] In this embodiment, both the first side 11 and the second side 12 are inclined relative to the radial surface of the propeller 3, so as to form a certain angle with the incoming flow at different positions on the arc-shaped surface of the second guide 1, thereby reducing the separation of water flow at the stern of the hull 4 and improving the uniformity of the flow field in front of the propeller 3. In other embodiments, as needed, only one side may be inclined, instead of both sides being inclined.

[0079] In this embodiment, the energy-saving combination device 7, through the above-described configuration, directs water flow from both sides of the hull 4 towards the stern 6, passing successively through the second guide member 1 and the first guide member 2 to the propeller 3. The inclined second guide member 1 forms an angle with the incoming flow from the hull 4 to the second guide member 1, reducing water flow separation at the stern of the hull 4 and improving the uniformity of the flow field in front of the propeller 3. Compared to a single guide member or a non-inclined guide member, the combination of two guide members extending in different directions further generates water flow beneficial to the propeller 3's propulsion, resulting in greater thrust from the propeller 3; thus improving the compatibility with the propeller, enhancing the ship's propulsion efficiency, and improving energy-saving effects. Furthermore, the two guide members are manufactured separately, resulting in a simple structure, ease of manufacturing, and reduced processing and installation costs; the curved second guide member 1, with its inclined configuration, reduces its volume compared to a straight guide member, thereby reducing manufacturing costs.

[0080] like Figure 6 As shown, when the energy-saving combination device 7 is not installed at the stern 6, the thrust of propeller 3 is 37.4N when propeller 3 operates at the same speed. However, as... Figure 7 As shown, when the energy-saving combination device 7 is installed at the stern 6, the thrust of the propeller 3 can reach 43.3N at the same rotational speed.

[0081] In this configuration, the energy-saving combination device 7 is positioned on the hull 4 in a direction opposite to the vertical plane and the rotation direction of the propeller 3. For example, as... Figure 5 As shown, in this embodiment, since the rotation direction B of the propeller 3 is right-handed, the energy-saving combination device 7 (including the first guide member 2 and the second guide member 1) is located on the left side of the vertical plane. However, in other embodiments, if the rotation direction B of the propeller 3 is left-handed, the energy-saving combination device 7 is located on the right side of the vertical plane.

[0082] The energy-saving combination device 7 is configured such that the water flow converges from both sides of the hull 4 to the stern 6. When the water flows through the energy-saving combination device 7, it generates a water flow that rotates in the opposite direction to the propeller 3, which helps to increase the propulsion force of the propeller 3, thereby further improving the propulsion efficiency and energy-saving effect of the ship.

[0083] Among them, such as Figure 2-4As shown, the second guide member 1 also includes a third side 13 and a fourth side 14 respectively disposed at the starting end and the ending end of the propeller 3 in the direction of rotation; the third side 13 and / or the fourth side 14 are inclined relative to the axis of the propeller 3. Specifically, in this embodiment, both the third side 13 and the fourth side 14 are inclined relative to the axis of the propeller 3. In other embodiments, only one side of the third side 13 and the fourth side 14 may be inclined relative to the axis of the propeller 3, but it is a better choice to set both the third side 13 and the fourth side 14 inclined relative to the axis of the propeller 3, which can further reduce the separation of water flow at the stern of the hull 4, improve the uniformity of the flow field in front of the propeller 3, and help improve the propulsion force.

[0084] Wherein, the tilt angle of the first side 11 relative to the radial surface is the first tilt angle A1, the tilt angle of the second side 12 relative to the radial surface is the second tilt angle A2′, and the first tilt angle A1 is different from the second tilt angle A2′; and / or, the tilt angle of the third side 13 relative to the axis of the propeller 3 is the third tilt angle B2, and the tilt angle of the fourth side 14 relative to the axis of the propeller 3 is the fourth tilt angle B1, and the third tilt angle B2 is different from the fourth tilt angle B1.

[0085] Specifically, such as Figure 4 As shown, the first tilt angle is A1, the second tilt angle is A2′ (A2′ and the tilt angle A2 of the second side 12 relative to the horizontal plane form a 90-degree right angle), the third tilt angle is B2, and the fourth tilt angle is B1. Depending on the different surface lines of the hull 4, A1 varies within a range of ±30 degrees, and A2 varies within a range of 30 to 90 degrees. However, A1 and A2′ use different angles, and B1 and B2 use different angles. The first side 11 and the second side 12 of the second guide member 1 use the above-mentioned different tilt angles, and / or the third side 13 and the fourth side 14 of the second guide member 1 use different tilt angles, all of which can achieve different angles with the incoming flow. This can more effectively reduce the separation of water flow at the stern of the hull 4, improve the uniformity of the flow field in front of the propeller 3, and help improve the propulsion force. In other embodiments, depending on the surface profile of the hull 4, only one pair of inclination angles (i.e., A1 and A2′ constitute one pair of inclination angles, and B1 and B2 constitute another pair of inclination angles) may use different inclination angles, rather than both pairs of inclination angles necessarily using different inclination angles.

[0086] The second tilt angle A2′ is greater than the first tilt angle A11, which makes the second side 12 located at the end of the water flow better match the flow curve of the water flow converging from both sides of the hull 4 to the stern 6, which helps to reduce the separation of the water flow at the stern of the hull 4.

[0087] Among them, such as Figure 1 and Figure 5 As shown, the first guide member 2 includes a fifth side 21 and a sixth side 22 arranged sequentially along the first direction A. Each first guide member 2 is inclined about the sixth side 22 as its axis and is inclined in the same direction relative to the radial surface of the propeller 3. Figure 5 As shown, in this embodiment, the propeller 3 is right-handed, so all three first guide members 2 are tilted to the right and upward relative to the radial surface of the propeller 3. Depending on the shape of the hull 4, the tilt angles of the three first guide members 2 may be different, but the tilt direction is the same. The first guide members 2 are tilted in the same direction as described above, so that the water flow from both sides of the hull 4 to the stern 6 can be generated when passing through the first guide member 2, which can generate a water flow that rotates in the opposite direction to the propeller 3, which is beneficial to improving the propulsion force of the propeller 3, thereby further improving the propulsion efficiency and energy saving effect of the ship.

[0088] The fifth side 21 has an inclination angle of A3 relative to the radial surface, and the difference between the second and fifth inclination angles does not exceed a set angle error. Specifically, as shown in... Figure 2 As shown, the fifth tilt angle A3 of each first guide member 2 at its fifth side 21 is designed to be approximately the same as the second tilt angle A2′. The difference between the two angles is controlled within a set angle error range. Depending on the shape of the hull 4, this set angle error will vary, but it is usually a small angle error value (e.g., ±5 degrees) to achieve the effect of tilt matching. In this design, the second tilt angle A2′ and the fifth tilt angle A3 are approximately the same, so that the tilt angles of the second side 12 and the fifth side 21 through which the water flows tend to be consistent, which is conducive to the smooth flow of water and makes it less likely for water flow separation to occur.

[0089] Specifically, the first distance L0 between the endpoint of the first side 11 along the rotational path and the end face of the stern 6 is set to match the surface profile of the second guide 1 connecting to the hull 4; the second distance H0 between the endpoint of the first side 11 along the rotational path and the bottom of the hull is set to match the surface profile of the inclined guide connecting to the hull 4. This energy-saving combination device 7, employing such a matching relationship, can better adjust the position of the second guide 1 according to the different surface profiles of the hull 4, resulting in smoother water flow curve changes, reduced water flow separation, and improved uniformity of the flow field in front of the propeller 3, thereby increasing propulsion.

[0090] Furthermore, in order to better quantify the dimensional ratio between the first distance L0 and the second distance H0, such as Figure 2As shown, in this embodiment, both the first distance L0 and the second distance H0 can be referenced to the diameter of the propeller 3. That is, the ratio of the first distance to the diameter of the propeller 3 is defined as the first ratio. In this embodiment, the first ratio matching the surface profile is 0.48, i.e., L0 = 0.48D. Depending on the different surface profiles of the hull 4, the first ratio can vary between 0.1 and 1.0. Similarly, the ratio of the second distance to the diameter of the propeller 3 is the second ratio. In this embodiment, the second ratio matching the surface profile is 0.49, i.e., H0 = 0.49D. Depending on the different surface profiles of the hull 4, the second ratio can vary between 0.3 and 0.7.

[0091] The second guide component 1 is positioned according to its ratio to the diameter of the propeller 3. By adjusting the ratio, the first distance, the second distance and the surface line of the hull 4 are matched, which reduces the difficulty of adjustment to achieve matching, makes it easy to process and install, and reduces costs.

[0092] Whether both the first distance L0 and the second distance H0 need to be matched according to the hull surface morphology can be selected and adjusted accordingly based on the different hull surface morphologies or the needs of the flow guidance effect. That is, only the first distance or only the second distance can be matched with the hull surface morphology within the above-mentioned proportional range.

[0093] Specifically, the ratio of the diameter of the second guide member 1 at different positions in the first direction to the diameter of the propeller 3 matches the surface profile; and / or, the ratio of the lengths of the third side 13 and the fourth side 14 along the axis of the propeller 3 to the diameter of the propeller 3 also matches the surface profile. Specifically, as shown... Figure 3 As shown, the diameter at the inlet of the inclined duct (second guide member 1) is D1 = 0.54 * D, and the inlet of the inclined duct is its starting end along the first direction; the diameter at the outlet of the inclined duct is D2 = 0.55 * D, and the outlet of the inclined duct is its ending end along the first direction; the length of the fourth side of the upper part of the inclined duct is L11 = 0.23 * D, and the length of the third side 13 of the lower part of the duct is L2 = 0.5 * L1. The ratio of the above diameter parameters D1, D2 and length parameters L1, L2 to the propeller diameter D can be set according to different line shapes of the hull 4 surface, and usually the ratio value can vary between 0.1 and 1.0. Since the second guide member 1 extends in an arc shape, the second guide member 1 has multiple diameters at different positions in the first direction, and is not limited to the diameter at the inlet. The diameters at different positions match the line shape of the hull 4 surface, so the diameters at different positions may be different, but all vary between 0.1 and 1.0. Meanwhile, since the second guide element 1 has a certain thickness, the cross-section along its thickness direction is scaled using the same ratio based on the same matching rules mentioned above.

[0094] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An energy-saving combination device, installed at the stern of a ship, the stern also having a propeller installed thereon, at least a portion of the energy-saving combination device being disposed at the front end of the propeller along a first direction from bow to stern, the energy-saving combination device comprising a plurality of first guide members circumferentially spaced along the stern, each first guide member extending radially along the propeller, characterized in that, The energy-saving combination device further includes at least one second flow guide, which extends in a circumferential arc along the stern of the ship. At least a portion of the second flow guide is located at the front end of the first flow guide along the first direction, and at least a portion of the first flow guide is located within the angle range corresponding to the arc extension of the second flow guide. The second guide includes a first side and a second side arranged sequentially in the first direction, wherein the first side and / or the second side are inclined relative to the radial surface of the propeller; Along the first direction, the second flow guide, the first flow guide, and the propeller are arranged at intervals in sequence; The second guide member further includes a third side and a fourth side respectively disposed at the starting end and the ending end of the rotation direction of the propeller; the third side and / or the fourth side are inclined relative to the axis of the propeller.

2. The energy-saving combination device as described in claim 1, characterized in that, The propeller includes a vertical plane perpendicular to the radial plane and extending from the bottom of the ship to the deck, and the energy-saving assembly is positioned on the hull in the opposite direction to the direction of rotation of the propeller relative to the vertical plane.

3. The energy-saving combination device as described in claim 1, characterized in that, The first side has an inclination angle relative to the radial surface as a first inclination angle, and the second side has an inclination angle relative to the radial surface as a second inclination angle. The first inclination angle is different from the second inclination angle. And / or, The tilt angle of the third side relative to the axis of the propeller is the third tilt angle, and the tilt angle of the fourth side relative to the axis of the propeller is the fourth tilt angle. The third tilt angle is different from the fourth tilt angle.

4. The energy-saving combination device as described in claim 1, characterized in that, The ratio of the diameter of the second guide member at different positions in the first direction to the diameter of the propeller is matched with the surface profile of the hull; And / or, the ratio of the length of the third side and the fourth side along the propeller axis to the diameter of the propeller is matched with the surface profile.

5. The energy-saving combination device as described in claim 1, characterized in that, The first guide member includes a fifth side and a sixth side arranged sequentially along the first direction. Each of the first guide members is inclined about the sixth side as an axis and is inclined in the same direction relative to the radial surface of the propeller.

6. The energy-saving combination device as described in claim 1, characterized in that, The inclination angle of the second side relative to the radial surface is the second inclination angle; The first guide member includes a fifth side and a sixth side arranged sequentially along the first direction, and the fifth side has an inclination angle relative to the radial surface of a fifth inclination angle. The difference between the second tilt angle and the fifth tilt angle does not exceed the set angle error.

7. The energy-saving combination device as described in claim 1, characterized in that, The first distance between the endpoint of the first side along the path of the propeller's rotation direction and the stern end face is set to match the surface profile of the second guide member connected to the hull; Alternatively, the second distance between the endpoint of the first side along the path of rotation and the bottom of the ship is set to match the surface profile of the second guide connecting to the hull.

8. The energy-saving combination device as described in claim 7, characterized in that, The ratio of the first distance to the diameter of the propeller is a first ratio, which matches the surface profile, and the range of the first ratio is 0.1 to 1.0; And / or, the ratio of the second distance to the diameter of the propeller is a second ratio, the second ratio being matched with the surface profile, the second ratio being in the range of 0.3 to 0.

7.

9. A ship, characterized in that, The vessel includes an energy-saving combination device as described in any one of claims 1-8, the energy-saving combination device being installed at the stern, and at least a portion of the energy-saving combination device being located at the front end of the propeller along a first direction from bow to stern.

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