Energy-saving conduit

Abstract

The utility model provides an energy-saving conduit, the energy-saving conduit is installed on the upstream of a propeller at the tail of a ship body, the energy-saving conduit comprises a nearly semi-annular pipe assembly, the pipe assembly comprises a main body part and an extension part, the main body part is located in the middle of the pipe assembly in the circumferential direction, and the extension part is located in the middle of the pipe assembly in the circumferential direction. The two ends of the main body part in the circumferential direction extend outwards to form extension parts. According to the energy-saving guide pipe, the main body part and the extension parts in the pipe assembly are integrally arranged, so that the structure of the pipe assembly is relatively complete, the extension parts are formed by extending the two ends of the main body part in the circumferential direction, and the pipe assembly is installed in an offset mode, so that the wake flow of a stern can be improved, the power received by a propeller is reduced, and the energy-saving effect is finally achieved; wherein the pipe assembly replaces the rectification effect of part of the guide vanes, so that the number of the guide vanes is reduced, and the manufacturing cost and the maintenance and repair difficulty of the energy-saving guide pipe are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving conduits, in particular to an energy-saving conduit. Background Art

[0002] In the context of reducing carbon emissions from ship operations, energy-saving ducts have become the mainstream energy-saving equipment on the market due to their significant energy-saving effects and convenient modification methods. However, the inflow angle of each component of the energy-saving duct has a significant impact on its energy-saving effect. The level of production and installation manufacturers directly affects the operational energy-saving effect of the energy-saving duct.

[0003] The energy-saving catheter shapes currently under development are as follows: Figure 5 and 6 As shown, the duct can be broadly divided into "conventional duct" and "ray-type duct." Both consist of a duct structure and three or more guide vanes. During the design phase, the inflow angles of the multiple guide vanes need to be precisely set. However, during the production phase, limitations in the processing and installation environment will affect the installation accuracy of these design variables, thereby affecting the actual operation of the ship.

[0004] It can be seen that the above existing energy-saving conduits have the following disadvantages:

[0005] Complex structure: Energy-saving ducts on the market usually consist of multiple ducts and more than three guide vanes, which not only increases manufacturing costs but also increases the difficulty of maintenance and repair;

[0006] Complex installation and positioning: The inflow angle of each component significantly affects the energy-saving effect of the energy-saving duct. Therefore, the duct must be installed with high precision. However, the actual installation site environment is simple, which makes it difficult to control the duct's posture.

[0007] Therefore, in order to solve the above problems, the present invention proposes an energy-saving conduit that can reduce manufacturing costs and the difficulty of maintenance and repair, while also reducing the difficulty of installation. Utility Model Content

[0008] In order to solve the technical problems existing in the above-mentioned existing energy-saving conduits, the utility model provides an energy-saving conduit.

[0009] According to one purpose of the present invention, the present invention provides an energy-saving duct, which is installed upstream of a propeller at the rear of a ship. The energy-saving duct includes:

[0010] A nearly semi-annular tube assembly comprising a main body and an extension portion, wherein the main body is located in the middle of the tube assembly in the circumferential direction, and both ends of the main body extend outwardly to form extension portions, the ends of the extension portions being connected to the port and starboard sides of the stern of the hull, respectively, and a deflection angle being set between the axis of the tube assembly and the mid-longitudinal section of the hull;

[0011] A guide vane is provided, wherein an angle of attack is set between the guide vane and the stern wake, and the guide vane is connected between the tube assembly and the stern of the hull.

[0012] Preferably, the offset distance between the axis of the tube assembly and the axis of the stern of the hull ranges from 0.15 times to 0.45 times the radius of the propeller at the stern of the hull.

[0013] Preferably, the deflection angle between the axis of the tube assembly and the longitudinal section of the hull is not greater than 15°.

[0014] Preferably, the radial cross-section of the tube assembly is in the shape of a sector ring, and the angle of the sector ring is not less than 90°.

[0015] Preferably, the number of the guide vanes does not exceed 3, and adjacent guide vanes are spaced apart along the circumference of the tube assembly.

[0016] Preferably, the two radial side surfaces of the tube assembly are an inner side surface and an outer side surface, respectively, the radial cross-sectional dimension of the outer side surface of the tube assembly gradually decreases as it approaches the propeller at the tail end of the hull, and the radial cross-sectional dimension of the inner side surface of the tube assembly gradually increases as it approaches the axial ends of the tube assembly.

[0017] Preferably, the guide vane includes: a light guide vane, one end of the light guide vane in the length direction is connected to the stern of the hull located inside the tube assembly, and the other end of the light guide vane in the length direction passes through the tube assembly to the radial outside of the tube assembly.

[0018] Preferably, the guide vane further comprises: a conventional guide vane, one end of the conventional guide vane in the length direction is connected to the stern of the hull located inside the tube assembly, and the other end of the conventional guide vane in the length direction is connected to the tube assembly.

[0019] Preferably, the radial cross-section of the tube assembly is fan-shaped, the angle of the fan-shaped ring is close to 90°, the guide vanes include two conventional guide vanes and one ray guide vane, and in the circumferential direction of the tube assembly, one conventional guide vane is provided on each side of the ray guide vane.

[0020] Preferably, the guide vane is connected to the central position of the tube assembly in the axial direction, and in the axial direction of the tube assembly, the end of the tube assembly and the end of the guide vane are spaced apart;

[0021] One end of the conventional guide vane connected to the tube assembly extends to the inner side of the tube wall of the tube assembly, and one end of the conventional guide vane connected to the tube assembly is flush with the outer side surface of the tube assembly.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The energy-saving duct integrates the main body and the extension part of the pipe assembly to make the pipe assembly structure relatively complete. The extension part is formed by extending the two ends of the main body in the circumferential direction, and the pipe assembly is installed offset. A deflection angle is set between the pipe assembly and the mid-longitudinal section of the hull, so that the water flow entering the propeller disk surface is accelerated and pre-swirled, which can improve the wake at the stern, reduce the power received by the propeller, and ultimately achieve energy saving effects.

[0024] The tube assembly replaces part of the guide vane's rectifying effect, thereby reducing the number of guide vanes, thereby reducing the manufacturing cost of the energy-saving duct and the difficulty of maintenance and repair;

[0025] The end of the extension part is in direct contact with the hull, making the installation of the energy-saving duct relatively simple. The energy-saving duct with fewer components has fewer welding areas, which can reduce the installation difficulty and the risk of welding deformation of the energy-saving duct.

[0026] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of an energy-saving conduit according to the present invention from one viewing angle;

[0028] Figure 2 This is a schematic diagram of the energy-saving conduit as a whole from another perspective of the present invention;

[0029] Figure 3 This is a cross-sectional schematic diagram of an energy-saving conduit according to the present invention;

[0030] Figure 4 This is a schematic diagram of one embodiment of an energy-saving duct guide vane according to the present invention;

[0031] Figure 5 It is a schematic diagram of the prior art "ray-type catheter";

[0032] Figure 6 This is a schematic diagram of a conventional catheter in the prior art. DETAILED DESCRIPTION

[0033] The following description is intended to fully illustrate the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0034] See also Figure 1-4 The utility model provides a technical solution: an energy-saving conduit, comprising:

[0035] The energy-saving duct is installed upstream of the propeller 100 at the stern of the hull, and is characterized in that the energy-saving duct includes:

[0036] A nearly semi-annular tube assembly 200 includes a main body 201 and an extension 202. The main body 201 is located in the middle of the tube assembly 200 in the circumferential direction. Both ends of the main body 201 extend outward to form extensions 202. The ends of the extensions 202 are respectively connected to the port and starboard sides of the stern 100 of the hull. A deflection angle is set between the axis of the tube assembly 200 and the mid-longitudinal section of the hull.

[0037] The guide vane 300 has an attack angle set between the guide vane 300 and the stern wake, and the guide vane 300 is connected between the pipe assembly 200 and the stern 100 of the hull.

[0038] The energy-saving duct is formed by integrating the main body 201 and the extension 202 in the tube assembly 200, so that the structure of the tube assembly 200 is relatively complete. The extension 202 is formed by extending the two ends of the main body 201 in the circumferential direction, and the tube assembly 200 is installed offset. A deflection angle is set between the tube assembly 200 and the mid-longitudinal section of the hull, so that the water flow entering the propeller disk surface is accelerated and pre-swirled, which can improve the wake of the stern 100 of the hull and reduce the power received by the propeller, ultimately achieving an energy-saving effect.

[0039] The tube assembly 200 replaces part of the guide vanes for rectifying effect, reducing the number of guide vanes, thereby reducing the manufacturing cost of the energy-saving duct and the difficulty of maintenance and repair;

[0040] The end of the extension portion 202 is in direct contact with the hull, making the energy-saving duct relatively simple to install. The energy-saving duct with fewer components has fewer welding areas, which can reduce the installation difficulty and welding deformation risk of the energy-saving duct.

[0041] Furthermore, the two radial side surfaces of the tube assembly 200 are respectively an inner side surface 200a and an outer side surface 200b. The radius of the tube assembly 200 gradually decreases from the water inlet to the outlet, that is, the tube assembly 200 is approximately nozzle-shaped, and the cross-section of the tube assembly 200 has an airfoil profile. In other words, the radial cross-sectional dimension of the outer side surface 200b of the tube assembly 200 gradually decreases as it approaches the propeller of the stern 100 of the hull, while the radial cross-sectional dimension of the inner side surface 200a of the tube assembly 200 gradually increases as it approaches the axial ends of the tube assembly 200. That is, the inner wall thickness of the tube assembly 200 at the axial ends is less than the thickness at the axial center. Furthermore, the axial ends of the tube assembly 200 are respectively a first end and a second end, the first end being closer to the propeller of the stern 100 of the hull, and the angle between the inner side surface 200a of the first end and the outer side surface 200b of the first end is no greater than the angle between the inner side surface 200a of the second end and the outer side surface 200b of the second end. Preferably, the angle between the first end inner side surface 200a and the first end outer side surface 200b is smaller than the angle between the second end inner side surface 200a and the second end outer side surface 200b.

[0042] Furthermore, the offset distance between the axis of the tube assembly 200 and the axis of the stern portion 100 is in a range of 0.15 to 0.45 times the radius of the propeller of the stern portion 100 .

[0043] Furthermore, the deflection angle between the axis of the tube assembly 200 and the longitudinal section of the hull is no greater than 15°.

[0044] Furthermore, the radial cross-section of the tube assembly 200 is in the shape of a sector ring, and the angle of the sector ring is not less than 90°.

[0045] Furthermore, the number of the guide vanes 300 is no more than 3, and adjacent guide vanes 300 are arranged at intervals along the circumference of the tube assembly 200. Preferably, the number of the guide vanes 300 is 2 to 3.

[0046] The guide vane 300 includes: a light guide vane 301, one end of the light guide vane 301 in the length direction is connected to the hull tail 100 located inside the tube assembly 200, and the other end of the light guide vane 301 in the length direction passes through the tube assembly 200 to the radial outside of the tube assembly 200.

[0047] The guide vane 300 further includes a conventional guide vane 302 , one end of which in the length direction is connected to the hull tail 100 located inside the tube assembly 200 , and the other end of which in the length direction is connected to the tube assembly 200 .

[0048] In one embodiment, see Figure 4 The number of the guide vanes 300 is 3, the radial cross-section of the tube assembly 200 is fan-shaped, the angle of the fan-shaped is close to 90°, the guide vanes 300 include two conventional guide vanes 302 and one ray guide vane 301, and in the circumferential direction of the tube assembly 200, one conventional guide vane 302 is provided on each side of the ray guide vane 301.

[0049] In another embodiment, see Figure 1-3 , so the guide vane 300 includes a light guide vane 301.

[0050] It should be noted that the existing ray-type duct, that is, the energy-saving duct with the guide vanes extending out of the duct structure, has a cantilever beam structure and a high probability of vibration during the operation of the ship, which will damage the duct and even cause the duct to fall off. The energy-saving duct proposed in this technical solution, on the one hand, replaces part of the guide vane function through the extension part 202, and has a smaller number. On the other hand, the end of the extension part 202 is directly connected to the hull, thereby improving the overall stability performance and avoiding vibration during the operation of the ship.

[0051] Preferably, the light guide vanes 301 are correspondingly arranged on the main body 201 .

[0052] To enhance the stability of the energy-saving duct, the guide vane 300 is further connected to the axial center of the tube assembly 200. The end of the tube assembly 200 and the end of the guide vane 300 are spaced apart in the axial direction of the tube assembly 200. Furthermore, the end of the conventional guide vane 302 connected to the tube assembly 200 extends to the inside of the tube wall of the tube assembly 200. Furthermore, the end of the conventional guide vane 302 connected to the tube assembly 200 is flush with the outer surface 200b of the tube assembly 200. This achieves a stable connection between the guide vane 300 and the tube assembly 200, wherein the space between the end of the tube assembly 200 and the end of the guide vane 300 provides support for the relative position of the two in the axial direction of the tube assembly 200. Furthermore, the end of the extension 202 connected to the stern 100 extends to the inside of the stern 100, and the end of the guide vane 300 connected to the stern 100 extends to the inside of the stern 100. This ensures the stability of the connection between the energy-saving duct and the hull. Preferably, the pipe assembly 200 and the stern 100 are welded and fixed, forming an integrated design.

[0053] In summary, the axis of the tube assembly 200 is arranged eccentrically with respect to the axis of the stern, and the end of the tube assembly 200 is directly welded to the hull. The tube assembly 200 can play a certain role in guiding the flow, thereby replacing the guide vanes 300 located on the port and starboard sides; the guide vanes 300 generate pre-swirl upstream of the propeller in the opposite direction of the propeller's rotation. The tube assembly 200 and the guide vanes 300 in the energy-saving duct work together to improve the stern wake, reduce the power received by the propeller, and ultimately achieve an energy-saving effect.

[0054] The entire energy-saving duct structure is streamlined, greatly improving the production and processing efficiency of the duct. In addition, the number of guide vanes 300 is reduced, which limits the cantilever beam structure of the extended tube assembly 200, effectively reducing the vibration of the energy-saving duct caused by wake flow, propellers, etc., and extending the service life of the energy-saving duct.

[0055] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The scope of patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. An energy-saving duct installed upstream of a propeller at the stern of a ship (100), characterized in that: The energy-saving conduit comprises: A nearly semi-annular pipe assembly (200) includes a main body (201) and an extension (202), wherein the main body (201) is located in the middle of the pipe assembly (200) in the circumferential direction, and both ends of the main body (201) extend outward to form extensions (202), and the ends of the extensions (202) are respectively connected to the port and starboard sides of the stern (100) of the hull, and a deflection angle is provided between the axis of the pipe assembly (200) and the mid-longitudinal section of the hull; A guide vane (300) is connected between the tube assembly (200) and the stern of the hull (100), and an angle of attack is set between the guide vane (300) and the stern wake.

2. An energy-saving conduit according to claim 1, characterized in that: The offset distance between the axis of the tube assembly (200) and the axis of the stern (100) of the hull is in the range of 0.15 to 0.45 times the radius of the propeller of the stern (100) of the hull.

3. An energy-saving conduit according to claim 1, characterized in that: The deflection angle between the axis of the pipe assembly (200) and the longitudinal section of the hull is not greater than 15°.

4. The energy-saving conduit according to claim 1, characterized in that: The radial cross section of the tube assembly (200) is in the form of a sector ring, and the angle of the sector ring is not less than 90°.

5. An energy-saving conduit according to claim 4, characterized in that: The number of the guide vanes (300) does not exceed 3, and adjacent guide vanes (300) are arranged at intervals along the circumference of the tube assembly (200).

6. The energy-saving conduit according to claim 1, characterized in that: The two radial side surfaces of the tube assembly (200) are respectively an inner side surface (200a) and an outer side surface (200b); the radial cross-sectional dimension of the outer side surface (200b) of the tube assembly (200) gradually decreases in a manner close to the propeller at the stern of the hull (100); and the radial cross-sectional dimension of the inner side surface (200a) of the tube assembly (200) gradually increases in a manner close to the axial ends of the tube assembly (200).

7. The energy-saving conduit according to claim 5, characterized in that: The guide vane (300) comprises a light guide vane (301), one end of the light guide vane (301) in the length direction is connected to the hull tail (100) located inside the tube assembly (200), and the other end of the light guide vane (301) in the length direction passes through the tube assembly (200) to the radial outer side of the tube assembly (200).

8. An energy-saving duct according to claim 7, characterized in that: The guide vane (300) further comprises: a conventional guide vane (302), wherein one end of the conventional guide vane (302) in the length direction is connected to the hull tail (100) located inside the pipe assembly (200), and the other end of the conventional guide vane (302) in the length direction is connected to the pipe assembly (200).

9. The energy-saving conduit according to claim 8, characterized in that: The radial cross-section of the tube assembly (200) is in the shape of a fan ring, and the angle of the fan ring is close to 90 degrees. The guide vane (300) includes two conventional guide vanes (302) and one ray guide vane (301). In the circumferential direction of the tube assembly (200), one conventional guide vane (302) is respectively provided on both sides of the ray guide vane (301).

10. The energy-saving conduit according to claim 8, characterized in that: The guide vane (300) is connected to the central position of the tube assembly (200) in the axial direction, and in the axial direction of the tube assembly (200), the end of the tube assembly (200) and the end of the guide vane (300) are spaced apart; One end of the conventional guide vane (302) connected to the tube assembly (200) extends to the inner side of the tube wall of the tube assembly (200), and one end of the conventional guide vane (302) connected to the tube assembly (200) is flush with the outer side surface (200b) of the tube assembly (200).

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