Deformable surface resistance reduction device based on bionic tegillarca granosa

Abstract

The utility model discloses a deformable surface resistance reduction device based on bionic tegillarca granosa. The device comprises a deformable plate body structure module, the deformable plate body structure module comprises a main plate and a plurality of adjustable structures arranged on the main plate, and the adjustable structures are used for forming a dynamically adjustable resistance reduction surface; and the driving adjusting mechanism module is used for controlling the form of the adjustable structure so as to dynamically adjust the surface flow field characteristics of the deformable plate body structure module, and the real-time variable drag reduction effect is achieved. By simulating the concave-convex shape of the surface of the scapharca granosa shell, dynamic switching between a smooth surface and a groove surface is achieved through unfolding and folding of the corrugated plates, the surface shape can be adjusted in real time according to fluid parameters, and compared with a traditional fixing structure, the drag reduction efficiency is improved.

Description

A Deformable Surface Drag Reduction Device Based on Bionic Clam Technical Field

[0001] This utility model belongs to the field of drag reduction and noise reduction, and relates to a biomimetic non-smooth surface device, specifically a deformable surface drag reduction device based on a biomimetic clam. Background Technology

[0002] In contemporary industrial systems, fluid dynamics challenges permeate various engineering fields. From the aerodynamic layout design of aerospace vehicles and the optimization of hydrodynamic performance of marine vessels to the aerodynamic improvement of ground transportation vehicles such as automobiles and high-speed trains, the core issue always revolves around how to effectively reduce fluid resistance and noise pollution. Traditional technological approaches mainly focus on passive control methods such as surface smoothing coatings and streamlined design of external components, but these are limited by the physical constraints of fixed geometries, resulting in significant bottlenecks in adaptability to complex flow field environments.

[0003] Fluid adaptation mechanisms developed during biological evolution have provided innovative paradigms for the engineering field. Taking the array of dermal fins on shark skin, the serrated edges of owl wings, and the nodular protrusions on humpback whale pectoral fins as examples, these non-smooth surface structures can significantly reduce drag and noise during motion by modulating boundary layer flow patterns. Specifically, non-smooth surface microstructures can induce the formation of ordered vortex systems in fluid media, suppressing turbulent bursts by delaying boundary layer separation, thereby reducing pressure drag. Simultaneously, this non-uniform interface can alter the reflection path of sound waves, allowing incident sound energy to be converted into heat energy through multiple scattering and dissipation within the complex surface structure, achieving efficient attenuation of broadband noise. In the field of hydraulic machinery, similar structures can also effectively suppress the generation and collapse of cavitation bubbles by optimizing the pressure distribution on the blade surface, thus improving equipment operational stability.

[0004] Although biomimetic non-smooth surface technology has undergone principle verification in fields such as aerospace and marine engineering, current research still faces key technological barriers. Existing biomimetic structures are mostly static designs with fixed parameters, making it difficult to respond in real time to changes in dynamic parameters such as incoming flow velocity, turbulence intensity, and sound wave frequency. This results in a significant decrease in their drag reduction and noise reduction effectiveness as operating conditions fluctuate. Therefore, developing intelligent biomimetic surface systems with adaptive deformation capabilities, and dynamically adjusting the microstructure morphology to match real-time flow field characteristics, has become a core research direction for overcoming the application bottlenecks of traditional biomimetic technologies. Summary of the Invention

[0005] This invention addresses the severe wear of fluid transport machinery and the shortcomings of non-smooth wear-resistant technologies by providing a deformable surface drag-reduction device based on a biomimetic clam, thereby solving the problems mentioned in the background art.

[0006] The technical solution adopted by this utility model is as follows:

[0007] A deformable surface drag reduction device based on biomimetic cockles, comprising:

[0008] A deformable plate structure module, comprising a main board and multiple adjustable structures disposed on the main board, wherein the adjustable structures are used to form a dynamically adjustable drag-reducing surface;

[0009] A drive adjustment mechanism module is used to control the shape of the adjustable structure to dynamically adjust the surface flow field characteristics of the deformable plate structure module, thereby achieving a real-time variable drag reduction effect.

[0010] Furthermore, the adjustable structure includes:

[0011] The receiving slots are evenly distributed on the main board;

[0012] An adjusting plate is disposed within the receiving groove;

[0013] A deformable plate, connected to the adjusting plate, is used to form a dynamically adjustable surface structure, which can be formed into a raised or recessed shape as needed.

[0014] Furthermore, the drive adjustment mechanism module includes:

[0015] The worm gear is installed in the mounting slots on both sides of the main board;

[0016] The worm gear meshes with the worm.

[0017] A connecting pipe connects the worm gear and the threaded rod;

[0018] A threaded rod is fixedly connected to the adjusting plate and is used to adjust the shape of the deformable plate by lifting or lowering it.

[0019] Furthermore, the worm gear center hole is interference-fitted with the connecting pipe, the bottom end of the connecting pipe is rotatably connected to the bottom surface of the mounting groove through a deep groove ball bearing, and the top end extends into the receiving groove and forms a threaded transmission pair with the threaded rod through an internal threaded hole.

[0020] Furthermore, the two ends of the deformable plate are rotatably connected to the adjusting plate and the support block by connecting plates, and the top of the support block is flush with the top of the receiving groove, ensuring that the surface of the main board remains flat and smooth when the deformable plate is stored.

[0021] Furthermore, the worm gear is driven by a servo motor, which achieves synchronous rotation of the worm gear through a chain and a chain to control the convex or concave shape of the deformable plate.

[0022] Furthermore, the deformable plate has positioning plates at both ends, and the connecting plate has a locking groove corresponding to the positioning plate. The positioning plate is fixed to the connecting plate by locking bolts and wing nuts, which facilitates the disassembly and replacement of the deformable plate.

[0023] Furthermore, the deformable plate is a corrugated plate.

[0024] Furthermore, the device has multiple operating states:

[0025] When there is no fluid or low load, the adjusting plate is flush with the top of the receiving tank and the corrugated plate is fully retracted.

[0026] Under medium flow rate conditions, the regulating plate moves downward, and the corrugated plate forms a groove of medium depth;

[0027] In high-speed fluid or strong turbulence conditions, the regulating plate is raised to the highest position, the corrugated plate is fully deployed, and the adjacent grooves between the corrugated plates are connected to form a biomimetic clam shell-shaped non-smooth surface.

[0028] This invention offers significant advantages: by simulating the uneven surface of a clam shell, the expansion and contraction of the corrugated plate dynamically switches between smooth and grooved surfaces, allowing for real-time adjustment of the surface morphology based on fluid parameters. This results in improved drag reduction efficiency compared to traditional fixed structures. The modular integrated design allows for the combination and installation of multiple independently driven receiving slot units as needed, making it suitable for engineering surfaces of varying sizes, such as aircraft wings and ship hulls, offering excellent scalability. The worm gear-worm wheel-thread transmission system features a self-locking function, eliminating the need for continuous power supply once the target shape is achieved, effectively reducing operating energy consumption. The expanded corrugated plate grooves not only disrupt the fluid boundary layer but also suppress turbulent pulsation. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the structure of this utility model;

[0030] Figure 2 is a schematic diagram of the chain connection of this utility model;

[0031] Figure 3 is a schematic diagram of one state of the adjustment plate of this utility model;

[0032] Figure 4 is a schematic diagram of another state of the adjustment plate of this utility model;

[0033] Figure 5 is a schematic diagram of another state of the adjustment plate of this utility model;

[0034] Figure 6 is a schematic diagram of the installation of the corrugated plate of this utility model;

[0035] Figure 7 is a schematic diagram of the installation of the wing nut of this utility model. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions.

[0038] This utility model includes a deformable plate structure module and a drive adjustment mechanism module; the deformable plate structure module consists of a main plate with arrayed receiving slots and an adjustment plate and a corrugated plate set in the slots, forming an adjustable protruding drag-reducing surface; the drive adjustment mechanism module is used to control the height of the adjustment plate and the undulation amplitude of the corrugated plate, thereby dynamically adjusting the flow field characteristics of the plate surface and achieving a real-time variable drag-reducing wear effect.

[0039] In some embodiments, mounting slots are symmetrically arranged on both sides of the plate, and a first worm gear and a second worm gear are rotatably connected inside, achieving synchronous rotation by a servo motor; the bottom of the receiving slots evenly distributed on the top surface of the plate forms a rotatable connection structure with the corrugated plate through an L-shaped support block.

[0040] In some embodiments, the drive adjustment mechanism module includes a worm gear assembly that meshes with a worm gear, each worm gear forming a transmission connection with a threaded rod through a connecting pipe; the top end of the threaded rod is fixed to an adjustment plate, and the corrugated plate is expanded or retracted by the lifting and lowering of the adjustment plate.

[0041] In some embodiments, the worm gear center hole is interference-fitted with the connecting pipe, the bottom end of the connecting pipe is rotatably connected to the bottom surface of the mounting groove through a deep groove ball bearing, and the top end extends into the receiving groove and forms a threaded transmission pair with the threaded rod through an internal threaded hole.

[0042] In some embodiments, the two ends of the corrugated plate are connected to the adjusting plate and the L-shaped support block by a cylindrical pin through a connecting plate, and the top of the support block is flush with the top of the receiving groove to ensure that the surface of the corrugated plate remains flat and smooth when it is stored.

[0043] The basic structural design of this utility model is as follows: The motherboard is made of a rigid, high-density material and is driven by a mechanical structure inside, combined with a stepper motor and a microcontroller chip. This allows it to adaptively change the protrusion amplitude and surface smoothness of the wear-resistant surface according to the detected fluid movement pattern inside the device.

[0044] Example:

[0045] As shown in Figure 1, this utility model includes a plate body 1 with multiple receiving slots 5. Mounting slots 7 are provided on both sides of the plate body. A first worm gear 15 is rotatably connected to one mounting slot 7, and a second worm gear 16 is rotatably connected to the other mounting slot. A motor 2 is fixedly connected to one end of the plate body. The output shaft of the motor 2 passes through the plate body 1 and is fixedly connected to the first worm gear 15. Multiple meshing worm wheels 13 are provided on one side of both the first worm gear 15 and the second worm gear 16. A connecting tube 8 is fixedly inserted into each of the multiple worm wheels 13. The bottom end of the connecting tube is connected to... The inner wall of the mounting groove 7 is rotatably connected. The top end of the connecting pipe 8 passes through the mounting groove 7 and extends into the receiving groove 6. A threaded rod 10 is threaded into one end of the extending connecting pipe 8. An adjusting plate 12 is provided in the mounting groove 7. The top end of the threaded rod 10 is fixedly connected to the adjusting plate 12. Support blocks 9 are fixedly connected to the inner walls on both sides of the receiving groove 5. A corrugated plate 11 is provided between the support block 9 and the adjusting plate 12. A connecting plate 14 is fixedly connected to both ends of the corrugated plate 11. The connecting plate 14 is rotatably connected to the adjusting plate 12 and the support block 9 through a shaft pin 6.

[0046] As shown in Figure 2, a chain disc 3 is fixedly sleeved at one end of the first worm 15 and the second worm 16. The two chain discs 3 are connected by a chain 4. The plate 1 has an opening corresponding to the chain 4. The top of the support block 9 is set parallel to the top of the receiving groove 5.

[0047] As shown in Figure 6, both ends of the corrugated plate 11 are fixed with positioning plates 17. The connecting plate 14 is provided with a locking groove corresponding to the positioning plate 17. Multiple locking bolts 18 are fixedly connected in the locking groove. The positioning plate is provided with a through hole corresponding to the locking bolt 18. The positioning plate 17 is sleeved on the locking bolt 18. The top of the locking bolt 18 is threaded with a wing nut 19 (as shown in Figure 7). By the positioning plate 17 being sleeved on the locking bolt 18 and the wing nut 19 being screwed onto the top of the locking bolt, rotation is prevented. The wing nut 19 is used to press the positioning plate 17 to achieve the fixation between the corrugated plate 11 and the connecting plate 14. Moreover, the corrugated plate 11 is easy to disassemble and assemble when it is replaced in the future.

[0048] The device exhibits three different states under different operating conditions.

[0049] As shown in Figure 3, under no-fluid or low-load conditions, the adjusting plate is flush with the top of the receiving tank, the corrugated plate is fully retracted, and the plate surface is smooth. At this time, the motor stops working, and the worm gear transmission system uses the self-locking characteristic of the worm wheel to fix the position of the adjusting plate, without the need for continuous power supply. This smooth surface reduces the initial resistance when stationary or at low speeds, making it easier to clean and maintain the equipment.

[0050] As shown in Figure 4, when a medium-velocity fluid is present, such as during ship cruising or aircraft subsonic flight, the motor is first started to drive the output shaft to rotate the first worm gear in the forward direction. At the same time, the chain disk on the first worm gear is connected to the second worm gear through the chain, causing the second worm gear to rotate as well. When the first and second worm gears rotate together, the worm wheel meshing on one side will also rotate. At this time, the connecting pipe will also rotate. Simultaneously, the threaded rod inserted into the connecting pipe will push the adjusting plate downward, forming a medium-depth groove. The two ends of the adjusting plate will pull the corrugated plates to unfold, forming a groove between adjacent corrugated plates. This semi-unfolded groove structure interferes with the fluid boundary layer, suppresses turbulent bursts, reduces frictional resistance, and also scatters low- and mid-frequency noise, initially achieving a synergistic effect of drag reduction and noise reduction.

[0051] As shown in Figure 5, under high-speed fluid or strong turbulent conditions, such as high-speed ship navigation or supersonic aircraft flight, the motor is first started, causing the output shaft to drive the first worm to rotate in the opposite direction. Simultaneously, the chain on the first worm, connected by a chain, causes the second worm to rotate as well. When the first and second worms rotate together, the worm wheel meshing on one side will also rotate. At this time, the connecting pipe will rotate, and the threaded rod inserted into the connecting pipe will push the adjusting plate upwards to its highest position. The corrugated plate fully unfolds, and adjacent grooves connect to form a biomimetic clam-shell-like non-smooth surface. The motor continues to run until the threaded rod reaches its upper limit of travel, at which point the worm-worm wheel system self-locks again, exposing the porous material filling layer on the corrugated plate, significantly reducing pressure resistance and achieving wideband noise attenuation.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A deformable surface drag reduction device based on biomimetic cockles, characterized in that, include: A deformable plate structure module includes a main board and multiple adjustable structures disposed on the main board. The adjustable structures are used to form a dynamically adjustable drag-reducing surface. A drive adjustment mechanism module is used to control the shape of the adjustable structures to dynamically adjust the surface flow field characteristics of the deformable plate structure module and achieve a real-time variable drag reduction effect.

2. The deformable surface drag reduction device according to claim 1, characterized in that, The adjustable structure includes: a receiving groove evenly distributed on the main board; an adjustment plate disposed within the receiving groove; and a deformable plate connected to the adjustment plate to form a dynamically adjustable surface structure, wherein the surface structure can form a raised or recessed shape as needed.

3. The deformable surface drag reduction device according to claim 2, characterized in that, The drive adjustment mechanism module includes: a worm gear, which is disposed in the mounting slots on both sides of the main board; a worm wheel, which meshes with the worm gear; a connecting pipe, which connects the worm wheel and the threaded rod; and a threaded rod, which is fixedly connected to the adjustment plate and is used to drive the deformable plate to adjust its shape by lifting or lowering.

4. The deformable surface drag reduction device according to claim 3, characterized in that, The worm gear center hole is interference-fitted with the connecting pipe. The bottom end of the connecting pipe is rotatably connected to the bottom surface of the mounting groove through a deep groove ball bearing. The top end extends into the receiving groove and forms a threaded transmission pair with the threaded rod through an internal threaded hole.

5. The deformable surface drag reduction device according to claim 2, characterized in that, The two ends of the deformable plate are rotatably connected to the adjusting plate and the support block by connecting plates, and the top of the support block is flush with the top of the receiving groove, ensuring that the surface of the main board remains flat and smooth when the deformable plate is stored.

6. The deformable surface drag reduction device according to claim 3, characterized in that, The worm gear is driven by a servo motor, which achieves synchronous rotation of the worm gear through a chain and a chain to control the convex or concave shape of the deformable plate.

7. The deformable surface drag reduction device according to claim 5, characterized in that, The deformable plate has positioning plates at both ends, and the connecting plate has a locking groove corresponding to the positioning plate. The positioning plate is fixed to the connecting plate by locking bolts and wing nuts, which facilitates the disassembly and replacement of the deformable plate.

8. The deformable surface drag reduction device according to claim 7, characterized in that, The deformable plate is a corrugated plate.

9. The deformable surface drag reduction device according to claim 8, characterized in that, The device has multiple operating states: when there is no fluid or low load, the adjusting plate is flush with the top of the receiving tank and the corrugated plate is fully retracted; when the fluid has a medium flow rate, the adjusting plate moves down and the corrugated plate forms a groove of medium depth; when the fluid has a high flow rate or strong turbulence, the adjusting plate rises to the highest position, the corrugated plate is fully extended, and the adjacent grooves between the corrugated plates connect to form a biomimetic clam shell-like non-smooth surface.

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