Wide-speed-range propelling device

Abstract

The invention relates to the related technical field of propelling devices, in particular to a wide-speed-range propelling device which comprises a flow guide cover and a mandrel, and the flow guide cover is arranged around the mandrel to form a flow channel for medium conveying; the rotor assembly is arranged in the flow channel and is used for generating propelling power; the stator assembly is arranged in the flow channel and comprises adjustable blades and an adjusting mechanism used for adjusting working parameters of the blades, and the adjusting mechanism can independently or cooperatively adjust attack angle parameters of the blades and / or distance parameters between the blades and the rotor assembly; the driving device is used for providing power for the adjusting mechanism; the propelling efficiency of the propelling device under different navigational speed working conditions is improved by adjusting attack angle parameters and / or spacing parameters of the blades. The wide-speed-range propelling device can work with high propelling efficiency under different navigational speed working conditions, and meanwhile the cruising ability of an aircraft is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of propulsion devices, and particularly to a wide-speed-range propulsion device. Background Art

[0002] The pump-jet propeller has characteristics such as high efficiency and low noise, and is mainly applied to the military field. Currently, except for China and India, the United States, the United Kingdom, France, and Russia have used it for nuclear submarine propulsion. The United States proposed in 1944 to reduce the speed of the flow through the blades by pump injection to improve the performance of the propeller. The United Kingdom took the lead in installing a pump-jet structure on the "Trafalgar"-class nuclear submarines in the 1980s. The pump-jet propeller includes a rotor structure, a duct structure, and a stator structure.

[0003] For the existing pump-jet designs, most designs still focus on the design and innovation of the propeller blades as the main improvement and power enhancement directions, as well as the research on the flow-guiding design of the fairing and the rear and front placement of the stator. The existing designs still face the problem that the high-efficiency propulsion speed range is relatively small in terms of improving the efficiency of the propeller, and it cannot meet the working requirements of high-efficiency propulsion under various working conditions of the vehicle. In order to ensure the smooth propulsion under various conditions, certain concessions have been made in terms of energy conservation. At the same time, under more severe working conditions, the existing propeller designs still face problems such as stall and cavitation, and it is difficult to guarantee the safety of the crew on board.

[0004] Therefore, there is an urgent need for a propulsion device that can achieve high-efficiency propulsion in a wide speed range. Summary of the Invention

[0005] The purpose of the present invention is to provide a wide-speed-range propulsion device, which can solve the problem that the existing propulsion device has a relatively small high-efficiency propulsion speed range and cannot meet the working requirements of high-efficiency propulsion under various working conditions of the vehicle as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A wide-speed-range propulsion device, including a fairing and a core shaft, the fairing is arranged around the core shaft to form a flow channel for medium transportation;

[0007] A rotor assembly arranged in the flow channel, used to generate propulsion power;

[0008] A stator assembly arranged in the flow channel, including adjustable blades and an adjustment mechanism for adjusting the working parameters of the blades, the adjustment mechanism can independently or cooperatively adjust the angle-of-attack parameter of the blades and / or the spacing parameter between the blades and the rotor assembly;

[0009] A driving device, used to provide power for the adjustment mechanism;

[0010] Among them, by adjusting the angle of attack parameter and / or the spacing parameter of the blades, the propulsion efficiency of the propulsion device under different ship speeds is improved.

[0011] Optionally, the adjusting mechanism includes:

[0012] A base sleeve, slidably sleeved on the mandrel, with a groove track and a positioning port on its surface;

[0013] A rotating disk, cooperating with the groove track through a cylindrical coupling shaft;

[0014] A positioning slider, telescopically arranged inside the rotating disk;

[0015] A power device, used to control the telescopic movement of the positioning slider;

[0016] Among them, when the positioning slider extends, it cooperates with the positioning port to achieve spacing adjustment, and when it retracts, the angle of attack adjustment is achieved through the movement of the cylindrical coupling shaft in the groove track.

[0017] Optionally, the driving device is one of a hydraulic cylinder, an electric push rod or a linear motor, arranged on one side of the stator assembly, and used to push the base sleeve to move along the mandrel.

[0018] Optionally, the meridian plane of the fairing is an airfoil structure, including a symmetric airfoil or an asymmetric airfoil.

[0019] Optionally, the rotor assembly includes variable-section airfoil blades with a quantity of not less than 3.

[0020] Optionally, the stator assembly includes 3 - 9 adjustable-angle blades, and the angle adjustment range is ±45°.

[0021] Optionally, the mandrel is a hollow structure, and a control circuit and a power transmission device are arranged inside.

[0022] Optionally, it further includes a sensor module, used to monitor the flow velocity, pressure and blade angle parameters in the flow channel in real time.

[0023] Optionally, it further includes a control system, used to automatically adjust the working parameters of the blades according to the feedback signal of the sensor module.

[0024] Optionally, the propulsion device is applicable to the propulsion system of a submarine, an underwater vehicle or a ship.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: A wide-speed-range propulsion device provided by the present invention can achieve high propulsion efficiency under different ship speed conditions by adjusting the stator blade angle and spacing, and at the same time improve the endurance of the vehicle, thus solving the problem that the high-efficiency propulsion speed range of the existing propulsion device is small and it cannot meet the working requirements of the vehicle to achieve high-efficiency propulsion under various conditions. Brief Description of the Drawings

[0026] Figure 1 FIG. is a schematic diagram of the overall structure of a wide-speed-range propulsion device of the present invention;

[0027] Figure 2 is Figure 1 a schematic diagram of the structure of the stator assembly of the wide-speed-range propulsion device shown;

[0028] Figure 3 is Figure 1 a schematic diagram of the structure of the adjustment mechanism of the wide-speed-range propulsion device shown;

[0029] Figure 4 is Figure 1 a schematic diagram of the partial structure of the adjustment mechanism of the wide-speed-range propulsion device shown;

[0030] Figure 5 is Figure 1 a schematic diagram of the partial structure of the adjustment mechanism of the wide-speed-range propulsion device shown. Detailed Description of the Invention

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The inventors of the present invention found through research on problems such as the limited seagoing speed at the highest propulsion efficiency of existing pump-jet thrusters that the speed of the optimal propulsion efficiency is related to the angle of the stator blades and the distance between the stator blades and the rotor blades. Therefore, by adjusting according to different angles of the stator blades and the distance between the stator blades and the rotor blades, the optimal propulsion efficiency at different seagoing speeds can be obtained, thereby expanding the optimal speed range of the optimal propulsion efficiency and achieving the purpose of wide-speed-range high-efficiency propulsion.

[0033] Please refer to Figures 1-5The present invention provides a wide-speed range propulsion device, which includes a fairing 1 and a core shaft 2. The fairing 1 is arranged around the core shaft 2 to form a flow channel for medium transportation. The rotor assembly 3 is arranged in the flow channel. The rotor assembly 3 is used to generate propulsion power. The stator assembly 4 is arranged in the flow channel and is located at one end of the rotor assembly 3. The stator assembly 4 includes adjustable blades 42 and an adjustment mechanism 41. The adjustment mechanism 41 is used to adjust the working parameters of the blades 42. The adjustment mechanism 41 can independently or collaboratively adjust the angle of attack parameters of the blades 42 and / or the spacing parameters between the blades and the rotor assembly 3. The drive device 5 is used to provide power to the adjustment mechanism 41. Among them, by adjusting the angle of attack parameters and / or the spacing parameters of the blades 42, the propulsion efficiency of the propulsion device under different speed conditions can be improved, so that the wide-speed range propulsion device provided by the present invention can achieve the optimal propulsion efficiency at different seaworthy speeds, thereby expanding the optimal speed range of the optimal propulsion efficiency, and achieving the purpose of high-efficiency propulsion in a wide speed range.

[0034] Specifically, the adjustment mechanism 41 includes a base sleeve 411, a rotating disk 412, a positioning slider 413 and a power device 414. The base sleeve 411 is slidably sleeved on the core shaft 2. The surface of the base sleeve 411 is provided with a groove track 4111 and a positioning port 4112. The rotating disk 412 cooperates with the groove track 4111 through a cylindrical coupling 4121. The positioning slider 413 is telescopically arranged in the rotating disk 412. The power device 414 is used to control the telescopic action of the positioning slider 413. When the positioning slider 413 is extended, it cooperates with the positioning port 4112 to achieve spacing adjustment, and when it is retracted, the angle of attack is adjusted by the movement of the cylindrical coupling 4121 in the groove track 4111. This structural design has the advantages of simple structure, no excessive interaction of mechanical devices, and convenient maintenance and management.

[0035] In a specific embodiment, the driving device 5 is any one of a hydraulic cylinder, an electric push rod or a linear motor. Optionally, the driving device 5 is disposed on one side of the stator assembly 4. The driving device 5 is used to push the base sleeve 411 to move along the mandrel 2. It is understandable that the driving device 5 can also be other structures, such as being connected to the base sleeve 411 through a transmission member to drive the base sleeve 411 to move along the mandrel 2.

[0036] Alternatively, if Figure 1As shown in the figure, the propulsion device of the present invention includes a fairing 1, a core shaft 2, a rotor assembly 3, a stator assembly 4, and a driving device 5. The fairing 1 is cylindrical, and its meridian plane is an airfoil structure. Optionally, the airfoil structure of the fairing 1 may include a symmetric airfoil or an asymmetric airfoil. A flow channel is formed between the core shaft 2 and the fairing 1. The rotor assembly 3 is installed on the core shaft 2 and sucks water into the flow channel by rotation. Optionally, the rotor assembly 3 includes variable-section airfoil blades with a number of not less than 3. The stator assembly 4 is installed on the core shaft 2 and is used to control the water inflow and provide a balancing moment. Optionally, the stator assembly 4 includes 3-9 adjustable-angle blades 42. The angle adjustment range is ±45°. The rotation mechanism 41 of the stator assembly 4 includes a base sleeve 411, a rotating disk 412, a positioning slider 413, and a power device 414. The base sleeve 411 moves along the core shaft 2, and the rotating disk 412 is fixed to the groove track 4111 through a cylindrical coupling 4121. The positioning slider 413 is controlled by the power device 414 to expand and contract, realizing the rotation or distance adjustment of the stator blade 42.

[0037] As Figure 3 shown in the figure, when the angle of the stator blade 42 needs to be adjusted, the positioning slider 413 retracts, and the driving device 5 pushes the base sleeve 411 to move back and forth. Since the cylindrical coupling 4121 of the rotating disk 412 moves along the groove track 4111, the stator blade 42 remains in its original position, but the rotating disk 412 drives the blade 42 to rotate, realizing the angle of attack adjustment. This mode is applicable to scenarios where the propulsion efficiency at different speeds needs to be optimized.

[0038] As Figure 4 shown in the figure, when the distance between the stator blade 42 and the rotor assembly 3 needs to be adjusted, the positioning slider 413 drops and is fixed to the positioning port 4112. The driving device 5 pushes the base sleeve 411 to move back and forth. Since the rotating disk 412 cannot rotate, the stator blade 42 moves back and forth with the base sleeve 411, realizing the distance adjustment. This mode is applicable to severe working conditions such as avoiding stall or no-load operation.

[0039] By combining the adjustment of the angle and distance of the stator blade 42, the propulsion device can maintain high-efficiency propulsion at different speeds. For example, in low-speed working conditions, increase the angle of attack of the stator blade 42 and reduce the distance; in high-speed working conditions, reduce the angle of attack and increase the distance.

[0040] In an alternative embodiment, the mandrel 2 has a hollow structure, and a control circuit and a power transmission device (not shown in the figure) are provided inside the mandrel 2. This design can make the structure more compact and optimize space utilization. On the one hand, it can save installation space: by integrating the control circuit and the power transmission device inside, it avoids the entanglement of external pipelines, making the overall structure of the propulsion device more compact, especially suitable for submarines or underwater vehicles with limited space. On the other hand, it can improve the cleanliness of the flow channel: without additional external pipelines, it ensures that the fluid flow in the flow channel is not disturbed, reducing hydraulic losses (it can be measured that the turbulent noise can be reduced by 5%-8%). At the same time, it can also improve the protection performance. The hollow mandrel, as a sealed cavity, can effectively protect the internal circuits and pipelines from external water pressure (up to more than 10 MPa), corrosion or collision, and the reliability is increased by more than 50%.

[0041] In another alternative embodiment, it further includes a control system (not shown in the figure) and a sensor module (not shown in the figure). The sensor module is used to monitor the flow rate, pressure and blade angle parameters in the flow channel in real time. The control system is used to automatically adjust the working parameters of the blade 42 according to the feedback signal of the sensor module. By monitoring the working conditions in real time through the sensor module, the control system can automatically select the optimal parameters.

[0042] A wide-speed-range propulsion device provided by the present invention is applicable to the propulsion systems of submarines, underwater vehicles or ships, and can achieve high propulsion efficiency under different speed conditions by adjusting the angles and spacings of the stator blades, while improving the endurance of the vehicle, thus solving the problem that the high-efficiency propulsion speed range of the existing propulsion device is small and it cannot meet the working requirements of high-efficiency propulsion under various conditions of the vehicle.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wide speed range propulsion device, characterized in that: include: A flow guide cover and a core shaft, wherein the flow guide cover is arranged around the core shaft to form a flow channel for medium transportation; A rotor assembly disposed in the flow channel for generating propulsion power; A stator assembly disposed in the flow channel includes adjustable blades and an adjustment mechanism for adjusting operating parameters of the blades, wherein the adjustment mechanism can independently or collaboratively adjust an angle of attack parameter of the blades and / or a spacing parameter between the blades and the rotor assembly; A driving device, used to provide power to the adjusting mechanism; Among them, the propulsion efficiency of the propulsion device under different speed conditions is improved by adjusting the angle of attack parameters and / or spacing parameters of the blades.

2. The wide speed range propulsion device according to claim 1, characterized in that: The regulating mechanism comprises: The base sleeve is slidably mounted on the core shaft, and a groove track and a positioning opening are provided on the surface of the base sleeve; A rotating disk, which cooperates with the groove track through a cylindrical coupling; A positioning slider is telescopically arranged in the rotating disk; A power device, used to control the telescopic movement of the positioning slide block; When the positioning slide block is extended, it cooperates with the positioning opening to achieve spacing adjustment, and when it is retracted, the angle of attack is adjusted by the movement of the cylindrical coupling in the groove track.

3. The wide speed range propulsion device according to claim 2, characterized in that: The driving device is one of a hydraulic cylinder, an electric push rod or a linear motor, which is arranged on one side of the stator assembly and is used to push the base sleeve to move along the core shaft.

4. The wide speed range propulsion device according to claim 1, characterized in that: The meridian surface of the deflector is an airfoil structure, including a symmetrical airfoil or an asymmetrical airfoil.

5. The wide speed range propulsion device according to claim 1, characterized in that: The rotor assembly includes no less than three variable-section airfoil blades.

6. The wide speed range propulsion device according to claim 1, characterized in that: The stator assembly includes 3 to 9 blades with adjustable angles, and the angle adjustment range is ±45°.

7. The wide speed range propulsion device according to claim 1, characterized in that: The core shaft is a hollow structure, and a control circuit and a power transmission device are arranged inside.

8. The wide speed range propulsion device according to claim 1, characterized in that: It also includes a sensor module for real-time monitoring of flow velocity, pressure and blade angle parameters in the flow channel.

9. The wide speed range propulsion device according to claim 8, characterized in that: It also includes a control system for automatically adjusting the working parameters of the blade according to the feedback signal of the sensor module.

10. The wide speed range propulsion device according to any one of claims 1 to 9, characterized in that: The propulsion device is suitable for a propulsion system of a submarine, an underwater vehicle or a ship.

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