A new spoke type propeller mechanism

Abstract

The utility model discloses a novel spoke formula propeller blade mechanism relates to propeller technical field, including many pieces propeller blade and flange plate, propeller blade root installs on flange plate, the root width of propeller blade is less than the tail width of propeller blade, and the whole of propeller blade gradually increases from root to tail; One support ring is fixed on the propeller blade, and the center of the support ring is coaxial with the flange plate, the root of adjacent propeller blade is staggered and fixed and installed on the upper end or lower end of the flange plate, compared with prior art, the utility model discloses a blade gradually wide structure and the interaction of blade and support ring, and the lift conversion efficiency is high, and the structural stability is strong and energy loss is low.

Description

Technical Field

[0001] This utility model relates to the field of propeller technology, and in particular to a novel spoke-type propeller blade mechanism. Background Technology

[0002] Existing propeller blades generally employ a uniform blade width or a reverse gradient structure with a wider root and narrower tail. According to physical principles, when a propeller rotates, the angular velocity is consistent across all parts of the same diameter, but the linear velocity increases linearly with the radius. This means the linear velocity in the outer blade region is much higher than in the inner region. The area distribution of traditional blades is completely mismatched with this linear velocity gradient. The outer region, i.e., the tail of the blade, has the highest linear velocity but only a small fluid interaction area, while the inner region, i.e., the root of the blade, occupies a larger structural area. This prevents the high linear velocity advantage of the outer region from being effectively converted into force through sufficient interaction area, severely limiting hydrodynamic conversion efficiency and ultimately resulting in insufficient lift or thrust output.

[0003] Traditional blades rely primarily on the strength and thickness of their own materials to resist external forces during rotation, lacking specific support and reinforcement structures. Under high-speed rotation, blades must simultaneously withstand the combined effects of centrifugal force and fluid pressure, easily leading to irreversible bending deformation. On the one hand, this deformation process consumes a large amount of driving energy, resulting in wasted energy. On the other hand, blade deformation disrupts its designed hydrodynamic profile, causing turbulent fluid flow and further exacerbating lift or thrust loss, creating a vicious cycle of energy consumption, deformation, and performance degradation.

[0004] Traditional blades often employ rectangular or planar structural designs, which have poor geometric stability and are unable to withstand the long-term, high-frequency alternating effects of centrifugal force and fluid pressure. During long-term operation, fatigue cracks are prone to gradually develop in stress concentration areas such as the blade root and middle. As the service life increases, these cracks continue to propagate, further reducing the structural strength and hydrodynamic efficiency of the blade. This can also lead to safety hazards such as blade breakage and detachment, seriously affecting the propeller's operational safety and service life, and increasing equipment maintenance costs and downtime risks. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a novel spoke-type propeller blade mechanism that can achieve a synergistic improvement in linear velocity utilization efficiency, structural stability and lift conversion efficiency.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: This novel spoke-type propeller blade mechanism includes multiple propeller blades and a flange. The root of the propeller blade is mounted on the flange, and the width of the root of the propeller blade is smaller than the width of the tail of the propeller blade. The propeller blade as a whole gradually increases in size from the root to the tail. A support ring is fixed on the propeller blade, and the center of the support ring is coaxial with the flange. The roots of adjacent propeller blades are staggered and fixedly mounted on the upper or lower end of the flange.

[0007] In the above-mentioned technical solution of a novel spoke-type propeller blade mechanism, a more specific technical solution may be: the propeller blades are at least three, and each propeller blade is evenly distributed along the flange.

[0008] In some possible implementations, the support ring is fixedly installed at a position two-thirds of the length of each propeller blade from the root forward, forming an integral support frame; the gap between every two adjacent propeller blades and the arc segment corresponding to the support ring together form a closed triangular area.

[0009] In some possible implementations, the root of each propeller blade is mounted to the upper or lower end face of the flange via its respective hinge joint.

[0010] In some possible implementations, the hinge joint includes a connecting plate with through holes on both sides. A pair of ear plates are vertically arranged on the surface of the connecting plate between the two through holes. A hinge pivot is connected between the pair of ear plates. The hinge pivot is sleeved on the pivot plate. The pivot plate's support feet are sleeved on the hinge pivot. The pivot plate has two screw holes.

[0011] In some possible implementations, the connecting plate of the hinge joint is mounted on the upper or lower end face of the flange by screws, and the rotating plate of the hinge joint is connected to the root of the propeller blade by screws.

[0012] In some possible implementations, the support ring is fixed to the propeller blade by a screw, which is fixed 1cm-1.5cm away from the edge of the windward side of the propeller blade.

[0013] In some possible implementations, the ratio of the root tip width of the propeller blade to the tail tip width of the propeller blade is 1:2.5-3, and the leeward side of the propeller blade is arc-shaped from the root to the tail.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. High lift conversion efficiency: Because the root width of the propeller blade is smaller than the tail width, the blade gradually increases from the root to the tail. The blade area distribution is adapted to the linear velocity distribution. The high-speed area of ​​the outer ring fully utilizes the hydrodynamic efficiency through a larger working area. Compared with traditional blades, the lift conversion efficiency loss is reduced by more than 40%.

[0015] 2. Strong structural stability: Because this utility model adopts a spoke-type support ring and blades to form an integral support frame, each pair of adjacent helical blades and the corresponding arc segment of the support ring together form a triangular structure. The geometric stability of the triangular structure combined with the ring support effectively suppresses blade deformation. Compared with traditional unsupported blades, deformation loss is reduced by more than 40%, while avoiding blade fatigue damage and extending service life.

[0016] 3. Low energy loss: The spoke-type support structure reduces blade deformation, thereby reducing the wasted work consumed by deformation and converting more fluid forces into effective lift or forward thrust, significantly improving energy utilization efficiency.

[0017] 4. Easy assembly and simple structure: The connection between the propeller blades and the flange and support ring is simple and reliable, which facilitates mass production and maintenance, reduces the cost of use, and is suitable for a variety of scenarios, with broad application prospects. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the reverse side of this utility model.

[0019] Figure 2 This is a front perspective view of the present invention.

[0020] Figure 3 yes Figure 2 A magnified view from direction A.

[0021] Figure 4 This is a schematic diagram of the hinge joint structure of this utility model.

[0022] Explanation of markings in the diagram: 1. Propeller blade, 2. Shaft, 3. Flange, 4. Support ring, 5. Hinge joint, 5-1. Connecting plate, 5-2. Through hole, 5-3. Ear plate, 5-4. Hinge shaft, 5-5. Screw hole, 5-6. Screw. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1 , Figure 2The embodiment shown proposes a novel spoke-type propeller blade mechanism, including six propeller blades 1 and a flange 3 with a rotating shaft 2. The roots of the six propeller blades are evenly mounted on the flange 3. The root width of the propeller blade 1 is smaller than the tail width of the propeller blade. The propeller blades gradually increase in width from the root to the tail. The tail of the blade with the highest linear velocity has a larger fluid contact area, while the root of the blade with the lower linear velocity adopts a narrow design to avoid redundant fluid resistance, achieving an optimal fit between high linear velocity and large contact area. Compared with traditional blades of equal width or wide root and narrow tail, the hydrodynamic capture efficiency is improved by 40%. The thrust or lift output is significantly enhanced. A support ring 4 is fixed on the propeller blade 1, and the center of the support ring is coaxial with the flange 3. The roots of adjacent propeller blades 1 are staggered and fixed to the upper or lower ends of the flange 3. The staggered layout makes the blades more evenly stressed and avoids local overload of the flange. The support ring 4 is fixed to each propeller blade 1 at a position two-thirds of its length from the root by screws 6, forming an integral support frame. The screws are fixed 1cm-1.5cm away from the edge of the windward side of the propeller blade, which ensures the connection strength and avoids damaging the hydrodynamic characteristics of the blade, achieving a synergy of structural reinforcement and energy saving. The gap between every two adjacent propeller blades and the corresponding arc segment of the support ring together form a closed triangular area. Utilizing the geometric stability of the triangle and the ring support force, it effectively resists centrifugal force, fluid pressure and vibration impact during high-speed rotation. The maximum deformation of the blade is only 20%-30% of that of traditional blades, completely solving the problem of hydrodynamic profile damage caused by deformation of traditional blades. Figure 3 As shown, the root of each propeller blade is mounted on the upper or lower end face of the flange 3 via its own hinge joint 5, as... Figure 4As shown, the hinge joint includes a connecting plate 5-1 with through holes 5-2 on both sides. A pair of ear plates 5-3 are vertically arranged on the surface of the connecting plate between the two through holes. A hinge shaft 5-4 is connected between the pair of ear plates. A rotating plate 5-5 is sleeved on the hinge shaft. The support feet of the rotating plate are sleeved on the hinge shaft 5-4. Two screw holes 5-6 are opened on the rotating plate. The connecting plate 5-1 of the hinge joint 5 is installed on the upper or lower end face of the flange 3 by screws 6. The rotating plate 5-5 of the hinge joint 5 is connected to the root of the propeller blade by screws 6. By connecting the blade through the hinge joint, the blade angle can be finely adjusted and self-adapted. It can not only adapt to the hydrodynamic requirements under different working conditions, but also compensate for processing errors during assembly and improve assembly accuracy. At the same time, the hinge is connected by screws through the connecting plate and the rotating plate, which makes disassembly and assembly convenient and facilitates later maintenance and blade replacement. The ratio of the root tip width to the tail tip width of the propeller blade is 1:2.5-3. This ratio design adapts the blade's mass distribution to the stress distribution, reduces rotational inertia load, further improves structural operational stability, and avoids local fatigue damage caused by uneven mass distribution. The leeward side of the propeller blade is arc-shaped from the root to the tail. This arc shape optimizes the fluid flow trajectory, reduces airflow or water flow separation, and lowers pressure drag and eddy current loss.

[0026] When this mechanism is in operation, the flange drives the propeller blades and the spoke-type support ring to rotate synchronously. As the propeller blades gradually increase in size from the root to the tail, and the area gradually increases from the inside to the outside, the tail of the blade with a higher linear velocity has a larger fluid action area. According to the principles of fluid mechanics, the action area or distance of fluid flowing over the blade is positively correlated with the linear velocity. The larger blade area in the outer ring area and the higher linear velocity work together to generate a greater fluid force. According to Newton's second law, the fluid force is transmitted through the blades to the spoke-type support ring, and then through the synergistic effect of the ring and the blades to the flange, ultimately being converted into upward lift or forward thrust. The near-closed triangular region formed by the spoke-type support ring and the adjacent two blade structures utilizes the geometric stability of the triangle to effectively resist the centrifugal force and fluid pressure generated when the blades rotate at high speed, significantly reducing blade deformation, reducing energy loss caused by blade deformation, and ensuring maximum lift conversion efficiency.

[0027] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A novel spoke-type propeller blade mechanism, comprising multiple propeller blades and a flange, wherein the roots of the propeller blades are mounted on the flange, characterized in that: The width at the root of the propeller blade is smaller than the width at the tail of the propeller blade, and the propeller blade as a whole gradually increases in width from the root to the tail. A support ring is fixed on the propeller blade, and the center of the support ring is coaxial with the flange. The roots of adjacent propeller blades are staggered and fixedly installed at the upper or lower end of the flange.

2. The novel spoke-type propeller blade mechanism according to claim 1, characterized in that: The propeller blades are at least three in number, and each propeller blade is evenly distributed along the flange.

3. A novel spoke-type propeller blade mechanism according to claim 1 or 2, characterized in that: The support ring is fixedly installed at a position two-thirds of the length of each propeller blade from the root forward, forming an integral support frame; the gap between every two adjacent propeller blades and the arc segment corresponding to the support ring together form a closed triangular area.

4. The novel spoke-type propeller blade mechanism according to claim 3, characterized in that: Each propeller blade is mounted at its root to the upper or lower end face of the flange via its respective hinge joint.

5. A novel spoke-type propeller blade mechanism according to claim 4, characterized in that: The hinge joint includes a connecting plate with through holes on both sides. A pair of ear plates are vertically arranged on the surface of the connecting plate between the two through holes. A hinge pivot is connected between the pair of ear plates. The hinge pivot is sleeved with the pivot plate. The pivot plate's support feet are sleeved on the hinge pivot. The pivot plate has two screw holes.

6. A novel spoke-type propeller blade mechanism according to claim 5, characterized in that: The connecting plate of the hinge joint is mounted on the upper or lower end face of the flange by screws, and the rotating plate of the hinge joint is connected to the root of the propeller blade by screws.

7. A novel spoke-type propeller blade mechanism according to claim 3, characterized in that: The support ring is fixed to the propeller blade by a screw, which is installed 1cm-1.5cm away from the edge of the windward side of the propeller blade.

8. A novel spoke-type propeller blade mechanism according to claim 7, characterized in that: The ratio of the width at the root end of the propeller blade to the width at the tail end of the propeller blade is 1:2.5-3, and the leeward side of the propeller blade is arc-shaped from the root to the tail.

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