Propeller cavitation elimination jet flow structure and adjusting method

Abstract

The invention discloses a propeller cavitation elimination jet flow structure and an adjusting method, and belongs to the field of water area aircrafts, the jet flow structure comprises two independent jet flow structure forms: one is a propeller hollow-core rotating shaft high-pressure water pumping type jet flow structure, and the other is a propeller hollow-core rotating shaft high-pressure water pumping type jet flow structure; pressurized clean water is conveyed to each water spraying system of the propeller body through a multi-path or single-path water conveying channel by an external independent high-pressure water pumping system, so that cavitation elimination, cavitation elimination, resistance reduction, noise control and power boosting are realized; and the other structure is a propeller rotation self-suction type jet flow structure, water flow is automatically sucked by utilizing water pressure difference generated by rotation of the propeller and is sprayed out in branches, and the effects of cavitation elimination, cavitation hazard elimination and rotation speed increase are achieved. The area of the propeller does not need to be increased, cavitation diseases can be effectively eliminated, loads and high-temperature risks of the rotating shaft and the bearing are reduced, and the comfort, safety, hydrodynamic performance and propulsive efficiency of the aircraft are improved.

Description

Technical Field

[0001] This invention relates to the field of watercraft technology, and in particular to a propeller cavitation elimination jet structure and adjustment method. Background Technology

[0002] As the core propulsion component of surface ships, underwater vehicles, and other aquatic vehicles, the propeller's performance directly determines the vehicle's speed, propulsion efficiency, and operational safety. When a vehicle is traveling at high speed, the high-speed rotation of the propeller blades causes a sharp increase in the water flow velocity on the back of the blades, resulting in the pressure in a local area dropping below the saturated vapor pressure of water. This, in turn, triggers the boiling and vaporization of the water, forming a large number of cavitation bubbles.

[0003] These cavitation bubbles, carried by the water flow to the high-pressure area, will rapidly collapse, generating strong shock waves and instantaneous high temperatures that continuously impact the surface of the propeller blades, causing damage such as pits, cracks, and even material peeling, severely shortening the propeller's service life. On the other hand, the collapse of the bubbles is accompanied by significant noise and vibration, which not only reduces the comfort of the aircraft but may also interfere with the normal operation of the precision instruments and equipment on board, affecting navigation safety.

[0004] Currently, the industry's solutions to propeller cavitation problems mainly focus on optimizing the geometry of propeller blades, selecting high-strength anti-cavitation materials, or limiting the operating speed of the aircraft. However, these methods have obvious limitations: optimizing the blade shape is difficult and has limited applicability; high-strength materials are expensive and cannot fundamentally suppress cavitation; limiting the speed directly sacrifices the aircraft's sailing efficiency and makes it difficult to meet the requirements of high-speed navigation.

[0005] Therefore, there is an urgent need for a technical solution that can eliminate or alleviate propeller cavitation problems without significantly increasing the operating costs of the aircraft. Summary of the Invention

[0006] The purpose of this invention is to address the problem that existing propeller-driven surface vessels, underwater vehicles, and other water vehicles are prone to cavitation bubbles on the back of the propeller blades when traveling at high speeds due to local pressure dropping below the saturated vapor pressure of water. The collapse of these bubbles can cause blade damage, noise and vibration, as well as reduce propulsion efficiency and increase the load on the shaft and bearings. Therefore, this invention proposes a propeller cavitation elimination jet structure and adjustment method.

[0007] To achieve the above objectives, the present invention employs the following technology: a propeller cavitation elimination jet structure and adjustment method, wherein the jet structure can adopt any one of the following two independent structures: The propeller hollow shaft high-pressure pump-water type propeller jet structure includes a high-pressure pump-water system, a hollow shaft water injection system, and a slurry water spraying system, which are independent of the original water vehicle power. The hollow shaft water injection system includes a high-pressure water injection sleeve set outside the hollow shaft and a high-pressure regulating water valve located on the high-pressure water injection sleeve. The propeller slurry is set at the end of the hollow shaft through the propeller shaft. The hollow shaft and the propeller shaft are provided with a water delivery channel mechanism and a high-pressure water channel mechanism that are interconnected. The slurry water spraying system includes a cavitation elimination water spraying component connected to the high-pressure water channel mechanism and a cavitation elimination water spraying component that can provide additional power for propeller rotation. The propeller rotation self-inhalation propeller jet structure includes a sandwich propeller slurry based on the original water-based vehicle power drive. When the propeller slurry rotates, it draws in high-pressure water through the water intake port on the water-facing side. The propeller slurry also has defoaming jet slits and pressure equalizing jet holes to eliminate propeller cavitation and increase propeller speed.

[0008] As a further description of the above technical solution: the cavitation elimination water spray assembly includes a defoaming high-pressure water channel opened on the propeller impeller, and a defoaming high-pressure water nozzle connected to the defoaming high-pressure water channel.

[0009] As a further description of the above technical solution: the cavitation elimination water spray assembly includes a high-pressure water channel on the back of the propeller blade, which is opened on the back of the propeller blade, and a high-pressure water nozzle on the back of the propeller blade that is connected to the high-pressure water channel on the back of the propeller blade. It also includes a high-pressure water channel on the front of the propeller blade, and a high-pressure water nozzle on the front of the propeller blade that is connected to the high-pressure water channel on the front of the propeller blade.

[0010] As a further description of the above technical solution: the cross-sectional shape of the defoaming high-pressure water nozzle, the high-pressure water nozzle on the back of the propeller and the high-pressure water nozzle on the front of the propeller includes, but is not limited to, triangle, square and rectangle.

[0011] As a further description of the above technical solution: the water conveying channel mechanism and the high-pressure water channel mechanism adopt an independent multi-channel design. The internal water injection chamber of the high-pressure water injection jacket is divided into water injection jacket channels corresponding to the independent multi-channels by a sealing ring. The number of high-pressure regulating water valves corresponds to the number of water injection jacket channels. The independent multi-channel design realizes the precise control of the branch circuit in the slurry spraying system.

[0012] As a further description of the above technical solution: the water conveying channel mechanism and the high-pressure water channel mechanism adopt a single-channel design, wherein the internal water injection chamber of the high-pressure water injection jacket is sealed by a sealing ring, and the number of high-pressure regulating water valves corresponds to the single-channel design, thereby realizing centralized control of the branch channels in the slurry spraying system through the single-channel design.

[0013] As a further description of the above technical solution: a plurality of interlayer connecting blocks are provided in the interlayer of the propeller slurry to ensure the structural stability of the interlayered propeller slurry.

[0014] A method for adjusting the propeller cavitation elimination jet structure, adaptable to two independent jet structures, including any one of the following two adjustment methods: Method 1: Based on a high-pressure pump-water propeller jet structure with a hollow propeller shaft, including the following steps: S1. Based on the parameters of the watercraft and the cavitation elimination requirements, preset the pump pressure and flow parameters of the high-pressure pump water system, as well as the adjustment accuracy of the high-pressure regulating water valve. S2. Based on the propeller model and cavitation elimination requirements, preset the parameters such as water pressure and water volume of the cavitation elimination water spray component. S3. Based on the propeller model and requirements for cavitation elimination, power enhancement, and noise reduction, preset parameters such as water pressure, water volume, and number of water spray components for the cavitation elimination water spray assembly on the back of the propeller. S4. Based on the propeller model and requirements for power enhancement and noise reduction, preset parameters such as water pressure, water volume and number of water spray components for the power enhancement and noise reduction water spray components on the front of the propeller. S5. Start the high-pressure pump water system to draw in clean water through the bottom filtration and suction system and pressurize it to the preset pressure. S6. High-pressure water is controlled by a high-pressure regulating water valve to transport high-pressure water through the high-pressure water injection jacket, hollow rotating shaft, propeller shaft water conveying channel mechanism and high-pressure water channel mechanism to the corresponding components of the slurry spraying system; S7. High-pressure water sprayed by the water jet assembly eliminates air bubbles on the back of the propeller by eliminating cavitation, and high-pressure water sprayed by the water jet assembly eliminates cavitation problems and provides additional power.

[0015] Method 2: Based on a propeller-driven self-intake propeller jet structure, including the following steps: S1. Based on the propeller model and cavitation requirements, preset the water inlet width, defoaming jet slit width, and pressure equalizing jet hole type and quantity. S2. The propeller is rotated by the original power of the water vehicle. The water flow is drawn into the propeller jacket by the pressure difference between the high pressure on the water-facing side and the negative water pressure on the back of the blade. S3. The water is drawn in and sprayed out through the defoaming jet slit to eliminate cavitation, and then sprayed out through the pressure equalization jet hole to eliminate cavitation and increase the rotation speed.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By using high-pressure pump-type active pressurized jet or self-suction type differential pressure self-suction jet, it directly acts on the low-pressure area and cavitation-prone area on the back of the propeller blade. This can not only flush away the cavitation bubbles that have been generated and inhibit the formation of bubbles, but also eliminate the shock wave and high-temperature damage caused by bubble collapse. This solves the problems of blade pitting and cracking caused by propeller cavitation and greatly extends the service life of the propeller. High-pressure water flow can change the hydrodynamic environment of the front and back of the propeller, reducing rotational resistance. At the same time, the booster water jet system on the front and back can provide additional thrust, increasing the propeller speed and the maximum speed of the aircraft without increasing the propeller area. In addition, high-pressure water flow can change the noise characteristics of the front and back of the propeller, effectively reducing or eliminating vibration and noise generated by cavitation, improving the comfort of the aircraft and the stability of precision instruments. The injection of additional thrust can reduce the torque of the propeller hollow shaft, thereby reducing the working load on the shaft and fixed bearings, avoiding problems such as high temperature and wear caused by high load, improving the operational reliability of the aircraft propulsion system, and reducing maintenance costs and the probability of downtime. Attached Figure Description

[0017] Figure 1 A cross-sectional schematic diagram of the propeller blade in this invention is shown; Figure 2 This invention shows a cross-sectional schematic diagram of the defoaming nozzle on the water-facing side of the propeller blade and the front and back nozzle structures. Figure 3 A cross-sectional schematic diagram of the propeller blade nozzle structure on both sides of the present invention is shown; Figure 4 A schematic diagram of the structure of the propeller reverse jet nozzle of the present invention is shown; Figure 5 A schematic diagram of the propeller nozzles on both sides of the present invention is shown. Figure 6 The diagram shows the structural schematics of the front and back nozzles of the propeller of the present invention; Figure 7 This invention shows a schematic cross-sectional view of the main assembly of the multi-channel high-pressure water input type. Figure 8 This is a schematic top view cross-sectional view of the multi-channel high-pressure water input assembly of the present invention; Figure 9 A cross-sectional schematic diagram of the single-channel high-pressure water input propeller of the present invention is shown; Figure 10 A schematic diagram of the back jet nozzle structure of the single-channel high-pressure water input propeller of the present invention is shown; Figure 11 A schematic diagram of the front jet nozzle structure of the single-channel high-pressure water input propeller of the present invention is shown; Figure 12 This invention shows a schematic cross-sectional view of the main assembly of a single-channel high-pressure water input type. Figure 13 A schematic diagram of the back jet nozzle structure of the self-inhaling propeller in this invention is shown. Figure 14 A schematic cross-sectional view of the propeller-rotating self-inhaling sandwich propeller mechanism of the present invention is shown; Figure 15 A schematic cross-sectional view of the inlet of the self-inhaling sandwich propeller of the present invention is shown.

[0018] Legend: A. Propeller body; Aa. Propeller back side; Ab. Propeller front side; Ac. Water-facing side; Ad. Interlayer connecting block; B. Propeller shaft; B.1. Propeller shaft defoaming high-pressure water channel; B.2. Propeller shaft back high-pressure water channel; B.3. Propeller shaft front high-pressure water channel; C. Hollow propeller shaft; C.1. Propeller hollow shaft defoaming high-pressure water channel; C.2. Propeller hollow shaft back high-pressure water channel; C.3. Propeller hollow shaft front high-pressure water channel; D. High-pressure water injection jacket; D.1. High-pressure water injection jacket defoaming high-pressure water channel; D.2. High-pressure water injection jacket back high-pressure water channel; D.3. High-pressure water injection jacket front high-pressure water channel; E. High-pressure regulating water valve; E.1. High-pressure regulating water valve defoaming high-pressure water channel; E.2. High-pressure regulating water valve back high-pressure water channel; E.3. High-pressure regulating water valve front high-pressure water channel; F. Propeller shaft power input end; 1. Defoaming high-pressure water channel; 1.1. Defoaming high-pressure water nozzle; 1.2. Defoaming high-pressure water flow; 2. Propeller back high-pressure water channel; 2.1. Propeller back high-pressure water nozzle; 2.2. Propeller back high-pressure water flow; 3. Propeller front high-pressure water channel; 3.1. Propeller front high-pressure water nozzle; 3.2. Propeller front high-pressure water flow; 4. Sealing ring; 5. Limiting ring; 6. Thrust roller bearing; 7. Defoaming water channel; 7.1. Defoaming spray slit; 7.2. Defoaming water flow; 8. Water intake port; 8.1. Pressure equalizing spray hole; 8.2. Spray water flow. Detailed Implementation

[0019] 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.

[0020] Example 1: Reference Figures 1-8This embodiment provides a propeller cavitation elimination jet structure and adjustment method. The jet structure adopts a propeller hollow shaft high-pressure pump water type propeller jet structure with a multi-channel design, including a high-pressure pump water system, a hollow shaft water injection system, and a slurry water injection system, which are independent of the original water vehicle power. The high-pressure pump water system includes a bottom filtration and water intake system and a high-pressure water delivery pipeline. The bottom filtration and water intake system is fixed in the water-bearing area of ​​the vehicle's bottom and is used to draw in clean water. The hollow shaft water injection system includes a high-pressure water injection sleeve D set outside the hollow shaft C, and a high-pressure regulating water valve E located on the high-pressure water injection sleeve D. One end of the high-pressure water delivery pipeline is connected to the bottom filtration and water intake system, and the other end is sealed to the high-pressure regulating water valve E. The high-pressure regulating water valve E adopts a multi-channel independent control valve corresponding to the multi-channel, including a high-pressure regulating water valve defoaming high-pressure water channel E.1, a high-pressure regulating water valve back high-pressure water channel E.2, and a high-pressure regulating water valve front high-pressure water channel E.3, which respectively control the water pressure and flow rate of different functional channels. The hollow shaft C and the propeller shaft B are equipped with interconnected water supply channel mechanisms and high-pressure water channel mechanisms. The high-pressure water injection sleeve D is fixed to the inner wall of the installation chamber by the limiting ring 5, and the high-pressure water injection sleeve D is kept from longitudinal displacement with the hollow propeller shaft C by the thrust roller bearing 6 to ensure stable installation position. The water injection chamber inside the high-pressure water injection sleeve D is divided into three independent water injection sleeve channels by the sealing ring 4: high-pressure water injection sleeve defoaming high-pressure water channel D.1, high-pressure water injection sleeve back high-pressure water channel D.2, and high-pressure water injection sleeve front high-pressure water channel D.3. The three independent water injection sleeve channels correspond to the defoaming, back cavitation elimination and front noise reduction functions, respectively, and each water injection sleeve channel is connected to the output end of the corresponding high-pressure regulating water valve E. Propeller A is mounted at the end of hollow shaft C via propeller shaft B. Propeller A is powered by the propeller shaft's power input end F. The water delivery mechanism includes a high-pressure water channel C.1 for defoaming on the hollow propeller shaft, a high-pressure water channel C.2 on the back of the hollow propeller shaft, and a high-pressure water channel C.3 on the front of the hollow propeller shaft. The high-pressure water channel mechanism includes high-pressure water channels B.1 and B.2 on the back of the propeller shaft, which correspond one-to-one with the water delivery mechanism of hollow shaft C. The system includes a high-pressure water channel B.3 on the front of the propeller shaft, which is connected to the corresponding channel inside the propeller slurry A. The slurry spraying system includes a cavitation elimination spraying assembly and a cavitation elimination spraying assembly. The cavitation elimination spraying assembly consists of a defoaming high-pressure water channel 1 and a defoaming high-pressure water nozzle 1.1. The defoaming high-pressure water channel 1 extends along the interior of the propeller slurry A, and its input end is connected to the high-pressure water channel B.1. The defoaming high-pressure water nozzle 1.1 is located on the water-facing edge of the back of the propeller slurry A, and its width is adapted to the propeller size. The cavitation elimination spraying assembly includes... The system includes a high-pressure water channel 2 on the back of the propeller, a high-pressure water nozzle 2.1 on the back of the propeller, a high-pressure water channel 3 on the front of the propeller, and a high-pressure water nozzle 3.1 on the front of the propeller. The high-pressure water channel 2 on the back of the propeller is connected to the high-pressure water channel B.2. The high-pressure water nozzles 2.1 on the back of the propeller are evenly distributed in the low-pressure area on the back of the propeller blades A. The high-pressure water channel 3 on the front of the propeller is connected to the high-pressure water channel B.3. The high-pressure water nozzles 3.1 on the front of the propeller blades A are located on the front of the propeller blades A. The number of nozzles matches the number of propeller blades. The defoaming high-pressure water nozzle 1.1 sprays out... The defoaming high-pressure water jet 1.2 directly flushes away air bubbles generated on the water-facing side of the propeller back, preventing air bubbles from contacting the blade surface and causing cavitation; the high-pressure water nozzle 2.1 on the back of the propeller sprays high-pressure water jet 2.2, filling the low-pressure area on the back of the blades and eliminating cavitation, while the reaction force of the water flow provides additional assistance for propeller rotation; the high-pressure water nozzle 3.1 on the front of the propeller sprays high-pressure water jet 3.2, changing the hydrodynamic environment on the front of the blades, reducing rotational resistance, and disrupting the noise propagation path, thus achieving noise characteristic changes and noise reduction effects; The cross-sectional shapes of the defoaming high-pressure water nozzle 1.1, the propeller back high-pressure water nozzle 2.1, and the propeller front high-pressure water nozzle 3.1 include, but are not limited to, various shapes such as triangle, square, and rectangle.

[0021] Example 2: Reference Figures 9-12Unlike Embodiment 1, the water delivery channel mechanism and high-pressure water channel mechanism of this jet structure adopt a single-channel design. The high-pressure pump water system includes a bottom filtration and water intake system and a high-pressure water delivery pipeline. Its matching high-pressure regulating water valve E is a single-channel control valve, used for centralized control of the on / off of high-pressure water and pressure regulation. The internal water injection chamber of the high-pressure water injection sleeve D is an integral structure, which is sealed as a whole by the sealing ring 4. Its input end is connected to the single-channel high-pressure regulating water valve E. A single-channel propeller hollow shaft defoaming high-pressure water channel C.1 is opened inside the hollow shaft C. This channel is sealed and connected to the water injection chamber of the high-pressure water injection sleeve D. A single-channel propeller shaft defoaming high-pressure water channel B.1 is opened inside the propeller shaft B. It is connected to the single-channel channel of the hollow shaft C. This high-pressure water channel is also connected to the defoaming high-pressure water channel 1, the back high-pressure water channel and the front high-pressure water channel inside the propeller body A. All nozzles share the same pressure of high-pressure water, without the need for separate channel adjustment.

[0022] Example 3: Reference Figures 13-15 This embodiment provides a propeller cavitation elimination jet structure and adjustment method. The jet structure adopts a propeller rotation self-intake type propeller jet structure, including a sandwich propeller slurry A based on the original water vehicle power drive. When the propeller slurry A rotates, it draws in high-pressure water through the water intake port on the water-facing side Ac. The propeller slurry A also has defoaming jet slits and pressure equalizing jet holes to eliminate propeller cavitation and increase propeller speed. Several sandwich connecting blocks are provided in the sandwich of the propeller slurry A to ensure the structural stability of the sandwich propeller slurry A.

[0023] After the watercraft starts, its original power drives the propeller A to rotate at high speed. The water flow at the water-facing side Ac of the propeller generates high pressure due to the rotation of the blades, while a negative water pressure is formed on the back of the blades. Under the pressure difference between the high and negative water pressures, the external water flow is automatically drawn into the interlayer space of the propeller through the water intake 8 at the water-facing side Ac. The water flow drawn into the interlayer space is ejected through the defoaming spray slit 7.1 on the defoaming water channel 7, forming a continuous defoaming water flow 7.2, which directly covers the water-facing edge on the back of the propeller and eliminates cavitation in this area. Another path flows through the interlayer space to the pressure equalization spray hole 8.1, where it is ejected as a high-pressure water flow 8.2, filling the low-pressure area on the back of the blades and suppressing the generation and collapse of cavitation bubbles. At the same time, the reaction force of the high-pressure water flow reduces the propeller's rotational resistance, increases the propeller speed, and thus increases the maximum speed of the vehicle.

[0024] It should be noted that before assembling the jet structure of the present invention, the specific parameters of the jet structure need to be scientifically designed based on the flow rate and power of the pump pressure equipment, the diameter of the water delivery pipe, the diameter of the hollow propeller shaft, the flow rate and power of the high-pressure regulating water valve E, the flow rate of the high-pressure water injection sleeve D, the torque and hollow diameter of the hollow propeller shaft C, the water delivery channel inside the propeller, the width and flow rate of the defoaming gaps on the propeller blades, the number, gaps, and flow rate of the propeller cavitation elimination and auxiliary water spray system, and the changes in the frontal noise characteristics of the propeller and the number, gaps, and flow rate of the noise elimination and auxiliary water spray system.

[0025] The adjustment method for a propeller jet structure based on a hollow propeller shaft and a high-pressure pump-water type propeller jet structure includes the following steps: S1. Based on the parameters of the watercraft and the cavitation elimination requirements, preset the pump pressure and flow parameters of the high-pressure pump water system, as well as the adjustment accuracy of the high-pressure regulating water valve E. S2. Based on the propeller model and cavitation elimination requirements, preset the parameters such as water pressure and water volume of the cavitation elimination water spray component. S3. Based on the propeller model and requirements for cavitation elimination, power enhancement, and noise reduction, preset parameters such as water pressure, water volume, and number of water spray components for the cavitation elimination water spray assembly on the back of the propeller. S4. Based on the propeller model and requirements for power enhancement and noise reduction, preset parameters such as water pressure, water volume and number of water spray components for the power enhancement and noise reduction water spray components on the front of the propeller. S5. Start the high-pressure pump water system to draw in clean water through the bottom filtration and suction system and pressurize it to the preset pressure. S6. High-pressure water is controlled by the high-pressure regulating water valve E to transport high-pressure water through the water conveying channel mechanism and the high-pressure water channel mechanism of the high-pressure water injection sleeve D, the hollow rotating shaft C, and the propeller shaft B to the corresponding components of the slurry spraying system. S7. High-pressure water sprayed by the water jet assembly eliminates air bubbles on the back of the propeller by eliminating cavitation, and high-pressure water sprayed by the water jet assembly eliminates cavitation problems and provides additional power.

[0026] Based on a propeller-rotating self-intake propeller jet structure, the adjustment method for this jet structure includes the following steps: S1. Based on the propeller model and cavitation requirements, pre-determine the width of the water inlet 8, the width of the defoaming jet slit 7.1, and the shape and quantity of the pressure equalizing jet holes 8.1. S2. Using the prime mover of the water vehicle to drive the propeller A to rotate, the water flow is drawn into the propeller interlayer by the pressure difference between the high pressure on the water-facing side Ac and the negative water pressure on the back of the blade. S3. The water is drawn in and sprayed out through the defoaming jet slit 7.1 to eliminate cavitation, and then sprayed out through the pressure equalization jet hole 8.1 to eliminate cavitation and increase the rotation speed.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A propeller cavitation elimination jet structure, characterized in that, The jet structure can be selected from one of the following two independent structures based on the actual application and environmental requirements: The propeller hollow shaft high-pressure pump-water type propeller jet structure includes a high-pressure pump-water system, a hollow shaft water injection system, and a slurry water spraying system, which are independent of the original water vehicle power. The hollow shaft water injection system includes a high-pressure water injection sleeve (D) set outside the hollow shaft (C) and a high-pressure regulating water valve (E) located on the high-pressure water injection sleeve (D). The propeller slurry (A) is set at the end of the hollow shaft (C) through the propeller shaft (B). The hollow shaft (C) and the propeller shaft (B) are provided with a water delivery channel mechanism and a high-pressure water channel mechanism that are interconnected. The slurry water spraying system includes a cavitation elimination water spraying component that is connected to the high-pressure water channel mechanism and a cavitation elimination water spraying component that can provide additional power for propeller rotation. The propeller rotation self-inhalation propeller jet structure includes a propeller body (A) based on the original water vehicle power drive. The propeller body (A) adopts a sandwich design. When the propeller body (A) rotates, it draws in high-pressure water through the water intake port (8) on the water-facing side (Ac). The propeller body (A) also has defoaming jet slits (7.1) and pressure equalization jet holes (8.1) to eliminate propeller cavitation and increase propeller speed.

2. The propeller cavitation elimination jet structure according to claim 1, characterized in that, The cavitation elimination water spray assembly includes a defoaming high-pressure water channel (1) opened on the propeller impeller (A) and a defoaming high-pressure water nozzle (1.1) connected to the defoaming high-pressure water channel (1).

3. The propeller cavitation elimination jet structure according to claim 2, characterized in that, The cavitation elimination water spray assembly includes a high-pressure water channel (2) on the back of the propeller propeller (A) and a high-pressure water nozzle (2.1) on the back of the propeller propeller (2) connected to the high-pressure water channel (2). It also includes a high-pressure water channel (3) on the front of the propeller propeller (A) and a high-pressure water nozzle (3.1) on the front of the propeller propeller (2) connected to the high-pressure water channel (2).

4. The propeller cavitation elimination jet structure according to claim 3, characterized in that, The cross-sectional shapes of the defoaming high-pressure water nozzle (1.1), the high-pressure water nozzle on the back of the propeller (2.1), and the high-pressure water nozzle on the front of the propeller (3.1) include, but are not limited to, triangles, squares, and rectangles.

5. A propeller cavitation elimination jet structure according to claim 3, characterized in that, The water delivery channel mechanism and the high-pressure water channel mechanism adopt an independent multi-channel design. The internal water injection chamber of the high-pressure water injection jacket (D) is divided into water injection jacket channels corresponding to the independent multi-channels by the sealing ring (4). The number of high-pressure regulating water valves (E) corresponds to the number of water injection jacket channels. The independent multi-channel design realizes the precise control of the branch in the slurry spraying system.

6. A propeller cavitation elimination jet structure according to claim 3, characterized in that, The water conveying channel mechanism and the high-pressure water channel mechanism adopt a single-channel design. The internal water injection chamber of the high-pressure water injection sleeve (D) is sealed by a sealing ring (4), and the number of high-pressure regulating water valves (E) corresponds to the single-channel design. The single-channel design realizes the centralized control of the branch channels in the slurry spraying system.

7. A propeller cavitation elimination jet structure according to claim 4, characterized in that, The number and parameters of the high-pressure water nozzle (2.1) on the back of the propeller and the high-pressure water nozzle (3.1) on the front of the propeller can be designed according to actual needs.

8. The propeller cavitation elimination jet structure according to claim 1, characterized in that, The propeller slurry (A) has several interlayer connecting blocks (Ad) in its interlayer to ensure the structural stability of the interlayer propeller slurry (A).

9. A method for adjusting the propeller cavitation elimination jet structure according to any one of claims 1-8, characterized in that, This method is compatible with two independent jet structures, including any one of the following two adjustment methods: Method 1: Based on a high-pressure pump-water propeller jet structure with a hollow propeller shaft, including the following steps: S1. Based on the parameters of the water vehicle and the cavitation elimination requirements, preset the pump pressure and flow parameters of the high-pressure pump water system, as well as the adjustment accuracy of the high-pressure regulating water valve (E). S2. Based on the propeller model and cavitation elimination requirements, preset the parameters such as water pressure and water volume of the cavitation elimination water spray component. S3. Based on the propeller model and requirements for cavitation elimination, power enhancement, and noise reduction, preset parameters such as water pressure, water volume, and number of water spray components for the cavitation elimination water spray assembly on the back of the propeller. S4. Based on the propeller model and requirements for power enhancement and noise reduction, preset parameters such as water pressure, water volume and number of water spray components for the power enhancement and noise reduction water spray components on the front of the propeller. S5. Start the high-pressure pump water system to draw in clean water through the bottom filtration and suction system and pressurize it to the preset pressure. S6. High-pressure water is controlled by the high-pressure regulating water valve (E) to transport high-pressure water through the water delivery channel mechanism and high-pressure water channel mechanism of the high-pressure water injection sleeve (D), hollow rotating shaft (C), and propeller shaft (B) to the corresponding components of the slurry spraying system; S7. High-pressure water sprayed by the water jet assembly eliminates air bubbles on the back of the propeller by eliminating cavitation, and high-pressure water sprayed by the water jet assembly eliminates cavitation problems and provides additional power. Method 2: Based on a propeller-driven self-intake propeller jet structure, including the following steps: S1. Based on the propeller model and cavitation requirements, pre-determine the width of the water inlet (8), the width of the defoaming jet slit (7.1), and the hole type and quantity of the pressure equalizing jet (8.1); S2. Using the prime mover of the water vehicle to drive the propeller (A) to rotate, the water flow is drawn into the propeller interlayer through the pressure difference between the high pressure on the water-facing side (Ac) and the negative water pressure on the back of the blade. S3. The water is drawn in and sprayed out through the defoaming jet slit (7.1) to eliminate cavitation, and then sprayed out through the pressure equalization jet hole (8.1) to eliminate cavitation and increase the rotation speed.

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