Modular submerged waterjet propelled self-propelled ship model

Abstract

The present application relates to a kind of modularization submerged water jet propulsion self-propelled ship model, including ship body, submerged water jet propeller, propeller fixed base, ship body support frame and ship body channel supplement module;Ship body tail portion preset propeller installation groove;Propeller fixed base lower end is closely attached with submerged water jet propeller guide pipe and is welded, its upper end is from propeller installation groove upper end and is fixedly connected with ship body support frame, for carrying out self-propelled test;The upper end of ship body channel supplement module lower end surface is from propeller installation groove upper end and is fixedly connected with ship body support frame, for replacing propeller fixed base and submerged water jet propeller, carries out the ship resistance performance test without propeller.The present application is modularized by design, replaceable, not only reduce processing difficulty and cost, while realizing the convenient installation of propeller;And corresponding self-propelled performance and resistance performance test can be carried out on the same ship model.

Description

Technical Field

[0001] This invention relates to the field of ship model testing technology, specifically to a modular submersible waterjet propulsion self-propelled ship model. Background Technology

[0002] Submersible waterjet propulsion is a type of pump-driven propulsion system consisting of an impeller, guide vanes, and ducts. It enables efficient propulsion over a wide speed range while exhibiting superior vibration and noise performance, making it a novel propulsion method suitable for green, low-carbon, and environmentally friendly surface vessels. The stern configuration and integrated installation methods of this type of propulsion differ significantly from conventional propeller and stern-plate waterjet propulsion systems. Furthermore, its hull-propulsion interaction characteristics and the resulting stern flow field variations also differ from other propulsion methods. Analyzing and predicting the hydrodynamic performance of submersible waterjet propulsion vessels through scaled-down model tests is a crucial step and technical support for conducting integrated optimization design and efficient propulsion mechanism research on this type of propulsion technology.

[0003] The submersible waterjet propulsion unit is integrated and installed in an inner groove at the bottom of the stern. The upper end of the propulsion duct needs to be embedded in the hull groove, and the flow surface of the inner groove should smoothly transition with the inner wall of the propulsion duct. If the "stern-submersible waterjet propulsion" integrated machining method is used to manufacture a self-propelled ship model, an additional propulsion-free ship model needs to be manufactured for drag performance testing. This makes it difficult to effectively guarantee the geometric consistency of the hull during drag and self-propulsion test analysis. The integrated machining solution for self-propelled ship models also suffers from problems such as large size, multiple dimensions, high precision requirements, and high manufacturing costs. If the stern and submersible waterjet propulsion units are machined separately, the assembly of the stern and propulsion integrated structure is complex, and ship model manufacturing faces challenges in the assembly method and installation positioning of the propulsion unit and hull. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology cannot effectively realize the submersible waterjet propulsion and the sub-component processing and positioning assembly of the stern of the hull, and cannot conduct resistance performance and self-propulsion performance tests on the same ship model. The present invention provides a modular submersible waterjet propulsion self-propelled ship model that is easy to assemble, has a moderate manufacturing cost, and can conduct resistance performance and self-propulsion performance tests on the same ship model, thus providing technical support for hydrodynamic performance testing of submersible waterjet propulsion ship models.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A modular submersible waterjet propulsion self-propelled boat model includes a hull and a submersible waterjet propulsion unit, as well as a propulsion unit mounting base, a hull support frame, and a hull channel completion module. The stern of the hull has a pre-set propulsion mounting slot at the propulsion mounting position. The propulsion unit mounting base is a hollow structure with openings at both the top and bottom. Its lower end is tightly fitted and welded to the duct of the submersible waterjet propulsion unit to form a closed-end integral structure. The upper end of the propulsion unit mounting base extends from the upper end of the propulsion mounting slot and is fixedly connected to the hull support frame, which is fixedly installed inside the hull. This allows for the rapid installation of the submersible waterjet propulsion system onto the hull, enabling self-propulsion testing. The hull channel filling module is a hollow structure with an open top and a closed bottom. Its lower end surface is adapted to the stern profile of the hull to form a complete bottom shell. The upper end of the hull channel filling module extends from the upper end of the propulsion mounting slot and is fixedly connected to the hull support frame, thereby enabling the rapid installation of the hull channel filling module onto the hull. This allows for the replacement of the integral structure formed by the propulsion fixing base and the submersible waterjet propulsion system, enabling hull drag performance testing without propulsion.

[0007] In the above scheme, the cross-section of the thruster mounting slot is square; the outer contour of the cross-section of the thruster fixing base is square and adapted to the thruster mounting slot; the outer contour of the hull channel filling module is square and adapted to the thruster mounting slot.

[0008] In the above scheme, there are two sets of hull support frames, which are distributed along the length of the ship on the front and rear sides of the propeller fixing base or the hull channel filling module. Each set of hull support frames includes two upper support arms and one lower crossbeam. The two upper support arms are fixedly connected to the inner walls of the two sides of the hull, and the left and right ends of the lower crossbeam are fixedly connected to the bottom of the two upper support arms, respectively. The front and rear side walls of the propeller fixing base or the hull channel filling module are fixedly connected to the lower crossbeams on the front and rear sides, respectively.

[0009] In the above scheme, the front and rear side walls of the thruster fixing base and the hull channel filling module are provided with a number of bolt holes, and the corresponding position of the lower end crossbeam is provided with matching bolt holes. The thruster fixing base or hull channel filling module is fixedly connected to the lower end crossbeam by bolts.

[0010] In the above scheme, the upper support arm of the hull support frame is fixedly connected to the inner wall of the hull by bolts, or the hull support frame is pre-set inside the hull during the model making process.

[0011] In the above scheme, the upper edge of the propeller mounting slot is higher than the waterline at the stern to ensure that water does not enter the stern of the model ship.

[0012] In the above scheme, the outer wall of the propeller fixing base is closely fitted with the inner wall of the propeller mounting groove, and the water contact surfaces of both are smoothly transitioned.

[0013] In the above scheme, there are two submersible waterjet propulsion units, located on the port and starboard sides respectively and arranged symmetrically; two propulsion unit mounting slots, two propulsion unit fixing bases, and two hull channel filling modules are respectively provided and arranged symmetrically on the left and right sides respectively.

[0014] In the above scheme, the submersible waterjet propulsion device includes a guide tube, guide vanes and an impeller, and the propulsion device fixing base is made of the same metal material as the guide tube and guide vanes of the submersible waterjet propulsion device.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The submersible waterjet propulsion self-propelled ship model of the present invention, through its modular and replaceable structural design, not only reduces the processing difficulty and cost of the submersible waterjet propulsion self-propelled ship model, but also realizes the convenient installation of the stern propeller of the submersible waterjet propulsion self-propelled ship model; and allows for corresponding self-propulsion performance and resistance performance tests on the same ship model, effectively ensuring the consistency of hull geometry in resistance and self-propulsion test analysis, while reducing test costs.

[0017] 2. The present invention has moderate manufacturing cost and convenient assembly, and is also applicable to the comparative test of self-propelled ship models for multi-scheme comparative analysis of submersible waterjet propulsion. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the stern structure of the submersible waterjet propulsion self-propelled boat model of the present invention;

[0020] Figure 2 This is a schematic diagram of the assembly of a submersible waterjet propulsion unit and its mounting base.

[0021] Figure 3 This is a schematic diagram of the structure of the propeller mounting base used for self-propelled testing;

[0022] Figure 4 This is a structural schematic diagram of the hull channel filling module used for hull resistance performance testing;

[0023] Figure 5 This is a schematic diagram of the propeller mounting slot reserved in the hull;

[0024] Figure 6 A top view of the stern with a reserved slot for the propeller installation.

[0025] In the diagram: 10. Hull; 11. Propeller mounting slot;

[0026] 20. Submersible waterjet propulsion system; 21. Guide tube; 22. Guide vane; 23. Impeller;

[0027] 30. Thruster mounting base;

[0028] 40. Hull support frame; 41. Upper support arm; 42. Lower crossbeam;

[0029] 50. Hull channel filling module. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1-5 As shown, this is a modular submersible waterjet propulsion self-propelled boat model provided by an embodiment of the present invention. It adopts a modular component design and manufacturing, including a hull 10, a submersible waterjet propeller 20, a propeller mounting base 30, a hull support frame 40, and a hull channel completion module 50. During manufacturing, a propeller mounting slot 11 is pre-set at the propeller mounting position at the stern of the hull 10. The propeller mounting base 30 is a hollow structure with openings at both the top and bottom. Its lower end is tightly fitted and welded to the conduit 21 of the submersible waterjet propeller 20 to form a closed-end integral structure. The upper end of the propeller mounting base 30 extends from the upper end of the propeller mounting slot 11 and is fixedly connected to the hull support frame 40, which is fixedly installed inside the hull 10, thereby achieving rapid installation of the submersible waterjet propeller 20 and the hull 10 for self-propelled testing. The hull channel filling module 50 is a hollow structure with an open top and a closed bottom. Its lower end face is adapted to the stern profile of the hull 10 to form a complete bottom shell of the hull. The upper end of the hull channel filling module 50 extends from the upper end of the propeller mounting slot 11 and is fixedly connected to the hull support frame 40, thereby realizing the rapid installation of the hull channel filling module 50 and the hull 10. It is used to replace the integral structure formed by the propeller fixing base 30 and the submersible water jet propulsion 20 and to carry out the drag performance test of the hull 10.

[0032] The submersible waterjet propulsion unit 20 is a pump-type propulsion unit, including a duct 21, guide vanes 22, and an impeller 23. The impeller 23 is a rotating component, driven to rotate by a drive shaft connected to the main engine within the hull 10. The guide vanes 22 and duct 21 are stationary components, fixedly connected. In this embodiment, there are two submersible waterjet propulsion units 20, located symmetrically on the port and starboard sides. Two propulsion unit mounting slots 11, two propulsion unit fixing bases 30, and two hull channel filling modules 50 are correspondingly provided, also arranged symmetrically on the left and right sides.

[0033] Further optimizations include making the propeller mounting slot 11 square in cross-section for easy installation, disassembly, and positioning; the outer contour of the propeller fixing base 30 is square to fit the propeller mounting slot 11; and the outer contour of the hull channel filling module 50 is square to fit the propeller mounting slot 11.

[0034] Further optimization involves using the hull support frame 40 module to connect and fix the thruster fixing base 30 module or the hull channel supplement module 50. In this embodiment, there are two sets of hull support frames 40, distributed along the length of the ship on the front and rear sides of the thruster fixing base 30 or the hull channel supplement module 50. Each set of hull support frames 40 includes two upper support arms 41 and one lower crossbeam 42. The two upper support arms 41 are fixedly connected to the inner walls of both sides of the hull 10, and the left and right ends of the lower crossbeam 42 are fixedly connected to the bottom of the two upper support arms 41, respectively. The front and rear side walls of the thruster fixing base 30 or the hull channel supplement module 50 are fixedly connected to the lower crossbeams 42 on their front and rear sides, respectively.

[0035] Further optimization involves providing several bolt holes on the front and rear side walls of the thruster fixing base 30 and the hull 10 channel filling module, and corresponding bolt holes on the lower crossbeam 42. The thruster fixing base 30 or the hull channel filling module 50 is fixedly connected to the lower crossbeam 42 by bolts.

[0036] Further optimization involves fixing the upper support arm 41 of the hull support frame 40 to the inner wall of the hull 10 with bolts, or pre-setting the hull support frame 40 inside the hull 10 during the model making process.

[0037] Further optimization involves placing the upper edge of the propeller mounting slot 11 at a height higher than the stern waterline to facilitate waterproofing of the model ship.

[0038] Further optimization has been achieved, with the outer wall of the thruster fixing base 30 closely fitting the inner wall of the thruster mounting groove 11, and both having a smooth transition on their water-contacting surfaces.

[0039] Further optimization involves the submersible waterjet propulsion unit 20, including the propulsion base 30, which is made of the same metal material as the guide tube 21 and guide vanes 22 of the submersible waterjet propulsion unit 20. In this embodiment, the guide vanes 22 and guide tube 21 can be made of lightweight metals such as aluminum alloy. The guide vanes 22 and guide tube 21 can be integrally machined or machined separately and then welded together. The impeller 23 can be manufactured using metal five-axis engraving or 3D printing.

[0040] The modular submersible waterjet propulsion self-propelled ship model designed in this invention can achieve self-propulsion test comparisons of different submersible waterjet propeller schemes by replacing the submersible waterjet propeller 20 and the propeller fixing base 30 module, without the need to re-process the hull support frame 40 and the hull 10. When conducting drag performance tests on the hull 10 corresponding to the submersible waterjet propulsion ship model, the propeller fixing base 30 and the submersible waterjet propeller 20 are disassembled, and a hull channel supplement module 50 with a closed lower end face is installed and connected and fixed to the hull support frame 40. The assembled hull 10 has no propeller and can be used for ship model drag performance tests.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0042] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A modular submersible waterjet propulsion self-propelled boat model, comprising a hull and a submersible waterjet propulsion system, characterized in that, It also includes a propulsion mounting base, a hull support frame, and a hull channel filling module; The stern of the hull has a pre-set propeller mounting slot at the propeller mounting position; The propeller mounting base is a hollow structure with openings at both the top and bottom. Its lower end is tightly attached to and welded to the duct of the submersible waterjet propeller to form an integral structure with a closed lower end. The upper end of the propeller mounting base extends from the upper end of the propeller mounting slot and is fixedly connected to the hull support frame fixedly installed inside the hull, thereby realizing the rapid installation of the submersible waterjet propeller to the hull for conducting self-propelled tests. The hull channel filling module is a hollow structure with an open top and a closed bottom. Its lower end face is adapted to the stern profile of the hull to form a complete bottom shell of the hull. The upper end of the hull channel filling module extends from the upper end of the propeller mounting slot and is fixedly connected to the hull support frame, thereby realizing the rapid installation of the hull channel filling module and the hull. It is used to replace the integral structure formed by the propeller fixing base and the submersible waterjet propeller, and to carry out hull drag performance tests without propellers.

2. The modular submersible waterjet propulsion self-propelled ship model according to claim 1, characterized in that, The cross-section of the thruster mounting slot is square; the outer contour of the cross-section of the thruster fixing base is square and adapted to the thruster mounting slot; the outer contour of the hull channel filling module is square and adapted to the thruster mounting slot.

3. The modular submersible waterjet propulsion self-propelled ship model according to claim 2, characterized in that, There are two sets of hull support frames, distributed along the length of the ship on the front and rear sides of the propeller fixing base or the hull channel filling module; each set of hull support frames includes two upper support arms and one lower crossbeam. The two upper support arms are fixedly connected to the inner walls of the two sides of the hull, and the left and right ends of the lower crossbeam are fixedly connected to the bottom of the two upper support arms, respectively; the front and rear side walls of the propeller fixing base or the hull channel filling module are fixedly connected to the lower crossbeams on the front and rear sides, respectively.

4. The modular submersible waterjet propulsion self-propelled ship model according to claim 3, characterized in that, The thruster fixing base and the hull channel filling module have several bolt holes on their front and rear side walls. The corresponding position of the lower crossbeam has matching bolt holes. The thruster fixing base or the hull channel filling module is fixedly connected to the lower crossbeam by bolts.

5. The modular submersible waterjet propulsion self-propelled ship model according to claim 3, characterized in that, The upper support arm of the hull support frame is fixedly connected to the inner wall of the hull by bolts, or the hull support frame is pre-set inside the hull during the model making process.

6. The modular submersible waterjet propulsion self-propelled ship model according to claim 1, characterized in that, The upper edge of the propeller mounting slot is at a height higher than the waterline at the stern to ensure that water does not enter the stern of the model ship.

7. The modular submersible waterjet propulsion self-propelled ship model according to claim 1, characterized in that, The outer wall of the thruster mounting base is in close contact with the inner wall of the thruster mounting groove, and the water-contacting surfaces of both are smoothly transitioned.

8. The modular submersible waterjet propulsion self-propelled ship model according to claim 1, characterized in that, There are two submersible waterjet propulsion units, located on the port and starboard sides respectively and arranged symmetrically; two propulsion unit mounting slots, two propulsion unit fixing bases, and two hull channel filling modules are respectively provided and arranged symmetrically on the left and right sides respectively.

9. The modular submersible waterjet propulsion self-propelled ship model according to claim 1, characterized in that, The submersible waterjet propulsion device includes a guide tube, guide vanes, and an impeller. The propulsion device mounting base is made of the same metal material as the guide tube and guide vanes of the submersible waterjet propulsion device.

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