Ultra large container propeller for complex sea conditions

Abstract

The utility model discloses a super large container propeller suitable for complex sea conditions relates to ship propulsion system technical field. It includes the hub body, is equipped with the central shaft sleeve, the anti -impact protection subassembly and the flow guide mechanism on the hub body, and the multiple connecting seat on the central shaft sleeve is annular array with the hub body as the axle, and the blade of installing with the flow guide wing and both sides flow guide protruding is installed on the connecting seat, the anti -impact protection subassembly contains titanium alloy wear -resistant layer of blade leading edge and blade tip, and the polyurethane elastic buffer pad between blade root and connecting seat. The utility model discloses through the flow guide structure cooperation optimization flow field, the anti -impact performance of protection subassembly strengthens, and the connecting seat gives consideration to the strength and light weight, effectively solve the problem of low propelling efficiency, poor fatigue resistance, insufficient adaptability of existing propeller, realize high -efficient steady propulsion under complex sea conditions, prolong the service life and reduce the maintenance cost, and adapt to the operation demand of super large container ship.

Description

Technical Field

[0001] This utility model relates to the field of ship propulsion system technology, specifically to an ultra-large container propeller adapted to complex sea conditions. Background Technology

[0002] As is well known, ultra-large container ships, as core equipment in ocean shipping, need to operate for extended periods in complex sea conditions such as wind, waves, eddies, and impacts from floating debris. The stability and efficiency of their propulsion systems directly affect transportation efficiency and operating costs. Currently, existing ultra-large container ship propellers have many technical shortcomings in practical applications: Traditional propeller blades are prone to water flow separation on their surface, and the eddy current phenomenon is prominent, resulting in turbulent water flow. This not only reduces propulsion efficiency but also increases ship energy consumption. The blades lack effective flow guiding structure design, which cannot guide the water flow in an orderly manner, further aggravating flow field interference and causing significant fluctuations in propulsion efficiency under complex sea conditions.

[0003] The leading edge and tip of the blade are subjected to external forces such as wave impact and floating object collision for a long time. Traditional protective structures are not wear-resistant and impact-resistant enough, and are prone to wear, deformation or even breakage. There is no effective buffer structure between the blade root and the connecting seat. The vibration load generated during operation is directly transmitted, which makes the connection prone to fatigue cracks and shortens the overall service life of the propeller.

[0004] Furthermore, traditional elastic buffer pads are mostly made of ordinary rubber, which has poor resistance to seawater corrosion, a short service life, and requires frequent replacement, increasing maintenance costs. These problems collectively make it difficult for existing ultra-large container ship propellers to simultaneously meet the requirements of efficient propulsion, impact resistance, and long-term stable operation, thus limiting the operational efficiency of ultra-large container ships in complex sea conditions. These technical issues urgently need to be addressed. Utility Model Content

[0005] (a) Technical problems to be solved In view of the problems of low propulsion efficiency, poor impact and fatigue resistance, insufficient seawater corrosion resistance and high maintenance cost of existing propellers, this utility model provides an ultra-large container propeller that can adapt to complex sea conditions.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an ultra-large container propeller adapted to complex sea conditions, comprising a hub body, a central bushing, an impact-resistant protection component, and a flow guiding mechanism on the hub body, a connecting seat on the central bushing, blades on the connecting seat, flow guiding vanes and flow guiding protrusions on the blades, the flow guiding protrusions being disposed on both sides of the blades, multiple connecting seats being provided and arranged in a circular array around the hub body as the axis, the impact-resistant protection component comprising a titanium alloy wear-resistant layer covering the leading edge and tip of the blades, and an elastic buffer pad between the blade root and the connecting seat.

[0007] Furthermore, the flow guiding mechanism includes a flow guide cover, a connecting frame is provided between the flow guide cover and the hub body, and the flow guide cover is provided with flow guiding holes.

[0008] Furthermore, the flow guide hole is a louvered flow guide hole.

[0009] Furthermore, the connecting seat has a hollow structure, and the connecting seat has an internal annular reinforcing rib and a carbon fiber interlayer.

[0010] Furthermore, the width of the guide protrusions is 2-3 mm, the spacing is 50-80 mm, and they extend along the span of the blade.

[0011] Furthermore, the elastic cushioning pad is made of polyurethane composite material with a thickness of 3-5 mm.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides an ultra-large container propeller that can adapt to complex sea conditions, and has the following beneficial effects: This ultra-large container propeller, adapted to complex sea conditions, effectively manages water flow on the blade surface, suppresses water separation, reduces eddy current generation, and optimizes the blade flow field environment by setting guide protrusions on both sides of the blade and setting guide vanes on the blade, in conjunction with the synergistic effect of the guide mechanism. In particular, the louvered guide holes can dynamically adjust the opening area or direction according to different sea conditions to adapt to changes in water flow speed and direction, further reducing wake diffusion loss and flow field interference, making the propulsion efficiency more stable under complex sea conditions, and effectively reducing ship energy consumption.

[0013] The titanium alloy wear-resistant layer covering the leading edge and tip of the blades, with its high hardness, can effectively resist external forces such as wave impact and floating object collision, reducing blade wear and damage. The polyurethane composite elastic buffer pad between the blade root and the connecting seat can fully absorb vibration and impact energy through elastic deformation, reduce vibration load transmission, and avoid fatigue cracks at the connection. The two work together to form all-round protection, significantly extending the overall service life of the propeller and reducing the frequency of failure maintenance.

[0014] The overall structural design fully considers the diversity of complex sea conditions. The guide protrusion extends along the blade span to constrain the water flow throughout and prevent local separation. The guide mechanism is rigidly connected to the hub body through the connecting frame to avoid vibration during high-speed rotation. The elastic buffer pad made of polyurethane composite material has excellent resistance to seawater corrosion, a long service life, and reduces maintenance costs. The coordinated operation of all structures enables the propeller to stably adapt to the high power requirements of ultra-large container ships and maintain efficient and stable operation under complex conditions such as wind, waves, and eddies, making it highly practical. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a frontal half-sectional view of the structure of this utility model; Figure 4 This is a top half-sectional view of the structure of this utility model.

[0016] In the figure: 1. Hub body; 2. Central bushing; 3. Connecting seat; 4. Blade; 5. Guide vane; 6. Guide protrusion; 7. Titanium alloy wear-resistant layer; 8. Elastic buffer pad; 9. Guide fairing; 10. Connecting frame; 11. Guide hole; 12. Annular reinforcing rib; 13. Carbon fiber sandwich. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1 to 4This utility model is a super-large container propeller adapted to complex sea conditions, including a hub body 1. The hub body 1 is provided with a central bushing 2, an impact-resistant protection component, and a flow guiding mechanism. The central bushing 2 is provided with a connecting seat 3. The connecting seat 3 is provided with blades 4. The blades 4 are provided with flow guiding vanes 5 and flow guiding protrusions 6. The flow guiding protrusions 6 are located on both sides of the blades 4. There are multiple connecting seats 3 arranged in a ring array with the hub body 1 as the axis. The impact-resistant protection component includes a titanium alloy wear-resistant layer 7 covering the leading edge and tip of the blades 4 and an elastic buffer pad 8 between the root of the blades 4 and the connecting seat 3. In use, the whole is connected to the ship's power system through the hub body 1. The central bushing 2 transmits power to the ring array of connecting seats 3, thereby driving the blades 4 to rotate to generate propulsion. When facing complex sea conditions such as wind, waves, eddies, and impacts from floating objects, the guide protrusions 6 and guide vanes 5 on both sides of the blade 4 guide the water flow in an orderly manner, reducing losses caused by water separation and eddies. The titanium alloy wear-resistant layer 7 and elastic buffer pad 8 in the impact-resistant protection component resist the loads from wave impacts, floating object impacts, and vibrations, respectively. The guide mechanism further optimizes the stability of the wake, ultimately achieving a synergistic effect of efficient propulsion and structural protection. The hub body 1 integrates the central bushing 2, the impact-resistant protection component, and the guide mechanism. As the basic support of the overall structure, it connects the ship's power system to the blade 4 and distributes the overall force, ensuring a stable connection between the propeller and the ship's power system, and bearing the radial and axial loads generated by the rotation of the blade 4. The central bushing 2 is set on the hub body 1 and is used to connect the ship's power shaft. Through its cooperation with the power shaft, it transmits the main engine torque to the connecting seat 3 and the blade 4, efficiently transmitting power, reducing power loss, and adapting to the high power requirements of ultra-large container ships. Multiple connecting seats 3 are arranged in a ring array around the hub body 1 as the axis, used to connect the central bushing 2 and the blades 4. The ring array distribution ensures that the blades 4 are subjected to uniform force, avoiding local stress concentration. Simultaneously, it serves as the connection medium between the blades 4 and the hub body 1, ensuring the concentricity of the blades 4 during rotation, improving the torsional strength of the overall structure, and adapting to variable loads under complex sea conditions. The blades 4, mounted on the connecting seats 3, are the core components generating propulsion. During rotation, they cut the water flow, converting mechanical energy into water flow thrust, directly providing forward propulsion for the ship. Their structural design, in conjunction with the guide protrusions 6 and guide vanes 5, determines the propulsion efficiency. The guide vanes 5, located on the blades 4 and extending along the span of the blades 4, streamline the water flow on the blade surface, reducing water flow turbulence and eddy current generation, lowering water flow resistance, and improving propulsion efficiency, especially under eddy current conditions. The guide protrusions 6 are located on both sides of the blades 4, using the protrusions to alter the water flow boundary layer, suppressing water flow separation, reducing cavitation generation, optimizing the flow field on the blade surface, reducing the risk of cavitation corrosion, and simultaneously reducing eddy current losses.The impact protection component includes a titanium alloy wear-resistant layer 7 covering the leading edge and tip of the blade 4 and an elastic buffer pad 8 between the root of the blade 4 and the connecting seat 3. The titanium alloy wear-resistant layer 7 resists wave impact and direct impact from floating objects due to its high hardness, reducing wear and impact damage to the leading edge and tip of the blade 4 and extending its service life. The elastic buffer pad 8 absorbs vibration and impact energy through deformation, reducing vibration transmission between the blade 4 and the connecting seat 3 and reducing the risk of fatigue cracks.

[0019] In this design, the flow guiding mechanism includes a flow guide shroud 9, with a connecting frame 10 between the flow guide shroud 9 and the hub body 1. The flow guide shroud 9 has flow guiding holes 11. The flow guide shroud 9 is fixed to the outer periphery of the hub body 1 via the connecting frame 10, forming an annular flow channel. The flow guiding holes 11 allow some water flow to pass through, breaking the vortex circulation of the wake. The flow guide shroud 9 constrains the wake behind the propeller, reducing water flow diffusion losses; the flow guiding holes 11 divert part of the water flow, reducing wake interference, especially when wind and waves cause water flow turbulence, further improving propulsion efficiency; the connecting frame 10 ensures a rigid connection between the flow guide shroud 9 and the hub body 1, preventing vibration during high-speed rotation.

[0020] In this design, the guide hole 11 is a louvered flow hole. The louvered flow hole can change its opening area or direction by adjusting the angle of the blades (4) to adapt to different sea conditions and water flow speeds and directions. Compared to a fixed guide hole 11, it can dynamically adapt to complex conditions such as wind, waves, and eddies. For example, the opening area can be increased to reduce resistance during strong winds and waves, and decreased to enhance the guiding effect during calm water flow, resulting in smaller fluctuations in propulsion efficiency.

[0021] In this design, the connecting seat 3 has a hollow structure, with annular reinforcing ribs 12 and carbon fiber interlayer 13 inside. The hollow structure reduces the weight of the connecting seat 3, achieving lightweight design; the annular reinforcing ribs 12 improve shear strength; and the carbon fiber interlayer 13 enhances fatigue resistance while absorbing vibration. The overall weight reduction lowers power consumption; the increased torsional strength prevents deformation of the connecting seat 3 during high power transmission; and the carbon fiber interlayer 13 reduces vibration transmission, extends the connection life between the connecting seat 3 and the blade 4, and reduces the risk of bolt loosening.

[0022] In this design, the guide protrusions 6 have a width of 2-3 mm and a spacing of 50-80 mm, extending along the spanwise direction of the blade 4. This spanwise extension constrains the water flow on the blade 4 surface throughout its length, preventing local separation and uniformly guiding the water flow. This precisely optimizes the flow field of the blade 4, reduces cavitation generation and eddy current losses, and steadily improves propulsion efficiency.

[0023] In this design, the elastic buffer pad 8 is made of polyurethane composite material with a thickness of 3-5 mm. Polyurethane composite material has a moderate elastic modulus, which can absorb impact energy, such as the instantaneous load generated by wave impact, through elastic deformation. This improves the absorption efficiency of impact loads and reduces the peak stress at the root of blade 4. Polyurethane material is resistant to seawater corrosion and has a long service life. Simultaneously, it ensures that the rigid connection between blade 4 and connecting seat 3 is not excessively affected during the buffering process, reducing the loss of power transmission efficiency.

[0024] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-large container propeller adapted to complex sea conditions, characterized in that: The device includes a hub body (1), a central bushing (2), an impact protection component and a flow guiding mechanism on the hub body (1), a connecting seat (3) on the central bushing (2), a blade (4) on the connecting seat (3), a flow guiding wing (5) and a flow guiding protrusion (6) on the blade (4), the flow guiding protrusion (6) being disposed on both sides of the blade (4), and multiple connecting seats (3) arranged in a ring array with the hub body (1) as the axis. The impact protection component includes a titanium alloy wear-resistant layer (7) covering the leading edge and tip of the blade (4) and an elastic buffer pad (8) between the root of the blade (4) and the connecting seat (3).

2. The ultra-large container propeller adapted to complex sea conditions according to claim 1, characterized in that, The flow guiding mechanism includes a flow guide cover (9), a connecting frame (10) is provided between the flow guide cover (9) and the hub body (1), and a flow guide hole (11) is provided on the flow guide cover (9).

3. The ultra-large container propeller adapted to complex sea conditions according to claim 2, characterized in that, The flow guide hole (11) is a louvered flow hole.

4. The ultra-large container propeller adapted to complex sea conditions according to claim 1, characterized in that, The connecting seat (3) is a hollow structure, and the connecting seat (3) has a built-in annular reinforcing rib (12) and a carbon fiber interlayer (13).

5. The ultra-large container propeller adapted to complex sea conditions according to claim 1, characterized in that, The width of the guide protrusion (6) is 2-3 mm, the spacing is 50-80 mm, and it extends along the span of the blade (4).

6. The ultra-large container propeller adapted to complex sea conditions according to claim 1, characterized in that, The elastic cushioning pad (8) is made of polyurethane composite material with a thickness of 3-5 mm.

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