Bow thruster with rectifier fins

Abstract

The application relates to a bow side pushing device with a flow regulating wing plate, belonging to the technical field of ship auxiliary propulsion, which is installed in a pre-opened nose bow of a ship and comprises a side pushing mechanism and two side flow regulating mechanisms. The side pushing mechanism mainly comprises a mounting cylinder as a bearing main body, and chamfers are arranged at the openings of the two ends of the mounting cylinder, and two groups of mounting holes are symmetrically and equidistantly arranged in the two chamfers, each group of mounting holes comprising three holes communicating with a ship cabin. A single flow regulating mechanism comprises a connecting rod, a mounting rod and a bearing plate, the connecting rod being a solid long circular shaft rod, one end of which is connected with a ship cabin driving device and can slightly rotate around the axis, and the two sides of the device are matched with adjustable flow regulating mechanisms, which can straighten the water flow passing through the opening of the mounting cylinder, inhibit the flow separation and large-scale vortex at the trailing edge of the mounting cylinder, eliminate the low-pressure differential resistance behind the opening, greatly reduce the additional resistance of the ship during navigation and reduce the energy consumption of the ship during navigation.

Description

Technical Field

[0001] This invention relates to the field of ship auxiliary propulsion technology, specifically to a bow thruster with a fairing vane. Background Technology

[0002] Ships typically have a bow thruster hull at the bow to house the bow thruster, which assists in berthing and unberthing at docks and low-speed turning. The thruster hull penetrates the hull plating, disrupting the smooth streamline of the hull. Seawater flowing through the hull opening is prone to flow separation, creating large-scale eddies at the trailing edge of the opening. These eddies consume propulsion energy, create a low-pressure zone behind the opening, generating aft pressure drag and increasing the ship's drag. They also significantly reduce the efficiency of the bow thruster and can cause problems such as hull vibration and excessive underwater noise.

[0003] To address the shortcomings of existing technologies, this invention designs a bow thruster with a fairing wing. Summary of the Invention

[0004] This invention provides a bow thruster with a flow straightener, which solves the problems of the bow thruster cylinder opening disrupting the hull streamline, causing water flow separation when passing through the opening, generating vortices at the trailing edge, resulting in increased ship navigation resistance, decreased thrust efficiency, and also causing hull vibration and excessive underwater noise.

[0005] This invention provides the following technical solution: a bow thruster with a fairing vane, installed inside a pre-drilled perforation in the bow of a ship, comprising: The side thruster mechanism is located inside the bow of the ship, with openings on both sides and a hollow center; Two sets of rectifier mechanisms, each with three long strip-shaped components, are located downstream of the side thrust mechanism; The side thrust mechanism includes a mounting cylinder, two chamfered sides, and two sets of mounting holes. The mounting cylinder is a transversely through cylindrical steel structure with uniform wall thickness. Both ends are fluid inlets and outlets, and the top of the cylinder has a pre-reserved wiring through hole. The chamfered sides have annular inclined transition structures that process the sharp cylinder opening into a smooth arc-shaped bevel, which is integrally formed into the openings on both sides of the mounting cylinder. The two sets of mounting holes are circular through holes, with three holes in each set arranged in a row, and two sets symmetrically arranged. The holes penetrate the side wall of the mounting cylinder and connect to the interior of the ship's cabin. Each of the aforementioned rectifier mechanisms includes a connecting rod, a mounting rod, and a bearing plate. The connecting rod is a solid long cylindrical shaft, one end of which is connected to the ship's cabin drive equipment and can rotate slightly around its own axis. The mounting rod is detachably fixed to the outside of the connecting rod, and the other end is welded to the bearing plate. The bearing plate is a long, flat plate-like component with a hollow body, arranged on the outer surface of the ship's bow and on both sides of the mounting hole.

[0006] As a preferred embodiment of the present invention, an expansion groove is provided on one side of the outer surface of a single bearing plate. The expansion groove is a long groove that can be fitted with an extension plate to expand the effective area of ​​the bearing plate.

[0007] As a preferred embodiment of the present invention, the rectifier mechanism further includes: The beveled section is formed at the outer end of each of the bearing plates away from the cylinder, with the outer corner of the bearing plate having a beveled structure that smoothly narrows the end of the plate.

[0008] As a preferred embodiment of the present invention, the rectifier mechanism further includes: The partition plate, consisting of multiple vertical thin steel plates welded into the internal cavity of the support plate, divides the support plate into multiple independent sealed cavities.

[0009] As a preferred embodiment of the present invention, the rectifier mechanism further includes: Multiple springs, one end of which is connected to the bottom of the sealed cavity, and the other end of which faces the opening of the sealed cavity; Multiple movable rods, which are slender straight rods, are connected at the bottom to the corresponding spring ends, forming a sealed space for each sealing cavity.

[0010] As a preferred embodiment of the present invention, the rectifier mechanism further includes: The arc-shaped column is an arc-shaped column that approximates a sphere. Its outer surface has a smooth, rounded transition and is fixed to the top of the movable rod. Under normal conditions, the outer arc surface is in close contact with the outer wall of the bow of the ship.

[0011] As a preferred embodiment of the present invention, the side-pushing mechanism further includes: Two sets of propellers are arranged in pairs on the left and right sides inside the mounting cylinder, with the drive shaft passing upward through the opening at the top of the cylinder to connect to the drive source inside the cabin.

[0012] As a preferred embodiment of the present invention, the side-pushing mechanism further includes: Protective grilles are installed on both sides of the outer surface of the mounting cylinder, completely covering the cylinder inlet and outlet, and located outside the propeller. Compared with the prior art, the present invention has the following beneficial effects: 1) The device is equipped with adjustable rectifiers on both sides, which can straighten the water flow through the opening of the installation cylinder, suppress the flow separation and large-scale eddies at the rear edge of the installation cylinder, eliminate the low pressure differential resistance behind the opening, greatly reduce the additional resistance when the ship is sailing, and reduce the energy consumption of the ship. 2) When the connecting rod is adjusted, the spring pusher keeps the arc-shaped column close to the hull, providing multi-point support, enhancing the fairing's resistance to water flow impact, and making the operation more stable; 3) The support plate is equipped with an expansion slot, which can expand the plate size as needed to adapt to different waters and different ship types and hydrodynamic requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the side-pushing mechanism of the present invention; Figure 3 This is a schematic diagram of the rectifier mechanism of the present invention; Figure 4 This is a schematic diagram of the movable rod of the present invention; Figure 5 This is a schematic diagram of the partition plate of the present invention; Figure 6 This is a schematic diagram of the spring of the present invention.

[0014] In the diagram: 1. Side thrust mechanism; 101. Mounting cylinder; 102. Propeller; 103. Protective grid; 104. Chamfer; 105. Mounting hole; 2. Rectifying mechanism; 21. Connecting rod; 22. Mounting rod; 23. Bearing plate; 24. Expansion groove; 25. Beveled section; 26. Movable rod; 27. Arc-shaped column; 28. Partition plate; 29. ​​Sealing cavity; 210. Spring. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-6 A bow thruster with a fairing is installed inside the bow of the ship and includes a thruster mechanism 1 and fairing mechanisms 2 on both sides.

[0017] Specifically, the side thrust mechanism 1 mainly consists of an installation cylinder 101 as the main support. Chamfers 104 are provided at the openings at both ends of the installation cylinder 101, and two sets of mounting holes 105 are symmetrically and equidistantly installed in the chamfers 104 on both sides. Each set of mounting holes 105 includes three holes communicating with the hull. The two-sided flow straightening mechanism 2 consists of a connecting rod 21, a mounting rod 22, and a support plate 23. Each set of flow straightening mechanism 2 includes three independently controllable long, flat plates. The connecting rod 21 is located in the mounting hole 105 and connected to a drive device installed inside the hull. It can drive the connecting rod 21 to slightly rotate other components to adapt to the water flow direction. The support plate 23 is connected to the outside of the connecting rod 21 via the mounting rod 22. The mounting rod 22 is welded to the support plate 23, and the mounting rod 22 can be removed from the connecting rod 21 for maintenance or replacement.

[0018] In one specific embodiment, please refer to Figures 3-6 On the outer surface of the bearing plate 23, a bearing plate 23 is provided. The plate can be extended according to the hydrodynamic analysis to adapt to different water areas. At the end of the bearing plate 23, a beveled section 25 is provided to minimize the end separation vortex caused by the wing itself.

[0019] In one specific embodiment, please refer to Figures 4-6 Inside the support plate 23, a partition plate 28 is provided, which divides the interior of the support plate 23 into multiple sealed cavities 29. In each sealed cavity 29, a movable rod 26 with its bottom connected to the support plate 23 is installed, and at the end of each movable rod 26, an arc-shaped column 27 that is close to a sphere is installed. Under normal conditions, each arc-shaped column 27 is in contact with the nose. When the connecting rod 21 drives the support plate 23 to rotate, the arc-shaped column 27 moves with the support plate 23, causing the movable rod 26 to compress the spring 210. This allows each arc-shaped column 27 to fit against the nose, thereby improving the overall stability and water flow resistance of the support plate 23.

[0020] In one specific embodiment, please refer to Figures 1-2 On both sides of the interior of the mounting cylinder 101, a propeller 102 is provided, and both propellers 102 are connected to the drive source located inside the ship through holes pre-drilled on the top of the mounting cylinder 101 that communicate with the interior of the ship. On both sides of the outer surface of the mounting cylinder 101, protective grilles 103 are installed to block the propellers 102.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bow thruster with a fairing vane, installed inside a pre-drilled perforation in the bow of a ship, characterized in that, include: The side thrust mechanism (1) is located inside the bow of the ship, with openings on both sides and a hollowed-out middle section; Two sets of rectifier mechanisms (2), each set having three long strip plate-shaped parts, are located downstream of the side push mechanism (1); The side thrust mechanism (1) includes an installation cylinder (101), two chamfers (104) on both sides and two sets of installation holes (105). The installation cylinder (101) is a transverse through cylindrical steel structure with uniform wall thickness. Both ends are fluid inlet and outlet, and the top of the cylinder has a reserved wiring through hole. The chamfers (104) on both sides are annular inclined transition structures, which process the sharp cylinder mouth into a smooth arc inclined surface and are integrally formed on the openings on both sides of the installation cylinder (101). The two sets of installation holes (105) are circular through holes, with three holes in a row in each set, and two sets are symmetrically arranged. The holes penetrate the side wall of the installation cylinder (101) and connect to the interior of the cabin. Each of the rectification mechanisms (2) includes a connecting rod (21), a mounting rod (22), and a bearing plate (23). The connecting rod (21) is a solid long cylindrical shaft, one end of which is connected to the ship's cabin drive equipment and can rotate slightly around its own axis. The mounting rod (22) is detachably fixed to the outside of the connecting rod (21), and the other end is welded to the bearing plate (23). The bearing plate (23) is a long flat plate component with a hollow plate body, arranged on the outer surface of the ship's bow and on both sides of the mounting hole (105).

2. The bow thruster with a fairing blade according to claim 1, characterized in that: An expansion groove (24) is provided on one side of the outer surface of a single bearing plate (23). The expansion groove (24) is a long groove that can be fitted with an extension plate to expand the effective area of ​​the bearing plate (23).

3. The bow thruster with a fairing blade according to claim 1, characterized in that: The rectifier mechanism (2) further includes: The beveled section (25) is formed at the outer end of each of the bearing plates (23) away from the cylinder. The outer corner of the bearing plate is beveled to smoothly narrow the end of the plate.

4. The bow thruster with a fairing blade according to claim 1, characterized in that: The rectifier mechanism (2) further includes: The partition plate (28) consists of multiple vertical thin steel plates welded into the cavity inside the bearing plate (23). The partition plate (28) divides the bearing plate (23) into multiple independent sealed cavities (29).

5. The bow thruster with a fairing blade according to claim 1, characterized in that: The rectifier mechanism (2) further includes: Multiple springs (210) are connected at one end to the bottom of the sealing cavity (29) and at the other end to the opening of the sealing cavity (29); Multiple movable rods (26), which are slender straight rods, are connected at the bottom to the end of the corresponding spring (210) to form a sealed space for each sealing cavity (29).

6. The bow thruster with a fairing blade according to claim 1, characterized in that: The rectifier mechanism (2) further includes: The arc-shaped column (27) is an arc-shaped column that is approximately spherical. Its outer surface has a smooth arc transition and is fixed to the top of the movable rod (26). Under normal conditions, the outer arc surface is in close contact with the outer wall of the bow of the ship.

7. The bow thruster with a fairing blade according to claim 1, characterized in that: The side-pushing mechanism (1) further includes: Two sets of propellers (102) are arranged in pairs on the left and right sides inside the mounting cylinder (101), and the drive shaft passes through the opening at the top of the cylinder to connect to the drive source inside the cabin.

8. The bow thruster with a fairing blade according to claim 1, characterized in that: The side-pushing mechanism (1) further includes: The protective grilles (103) on both sides are installed on the outer surfaces of the two ends of the mounting cylinder (101), completely covering the cylinder inlet and outlet, and located outside the propeller (102).

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