A combined submarine propulsion system for suppressing gap leakage

Abstract

This invention discloses a combined submarine propulsion device for suppressing gap leakage, comprising a pump casing, impellers, and a pump inlet. A ring of impeller front cover plates is provided around the impellers, fixedly connected to the outer periphery of the impellers without gaps, and rotating with the impellers. A radial gap exists between the impeller front cover plates and the pump casing, forming a leakage channel. Multiple sets of external magnet assemblies are uniformly arranged on the pump casing along the flow direction of the leakage channel, and multiple sets of internal magnet assemblies are uniformly arranged on the impeller front cover plates along the flow direction of the leakage channel. The external and internal magnet assemblies are positioned correspondingly and have opposite polarities, thereby generating magnetic induction lines. This invention, by modifying the impeller components with the addition of a front cover plate and a magnetic structure, utilizes the principle of electromagnetic induction to suppress leakage flow in the submarine propulsion device, reducing leakage and noise, and improving the efficiency and stealth of the submarine propulsion device.

Description

Technical Field

[0001] This invention relates to a novel marine submarine propulsion device, specifically a combined submarine propulsion device for suppressing gap leakage. Background Technology

[0002] Among all equipment used for exploring marine resources, underwater vehicles (UVs) possess unique advantages. They can submerge in the seawater for close-range and relatively accurate observation and photography, and can also perform salvage and construction operations. Since the 21st century, UVs have gradually gained importance in scientific research, and research on related technologies has become an increasingly prominent focus. Their role in the military fields of various countries is also becoming increasingly important.

[0003] Submersibles possess excellent navigational performance, including outstanding stability and seaworthiness. These superior performance characteristics enable them to function as military vessels capable of both deep-sea navigation and maneuvering freely in shallow waters. The maneuverability of a submersible determines its operational stability and maneuverability. The rapid advancements in the performance requirements of modern military weaponry and surface warships are, in effect, demands on the maneuverability and maneuverability of submersibles.

[0004] The superior performance of underwater vehicles is inseparable from advanced propulsion systems. Pump-jet propulsion systems with tapered vectoring nozzles can delay cavitation, reduce noise, and improve propulsion efficiency. Therefore, pump-jet propulsion systems have wider applications in military applications such as high-speed torpedoes and underwater vehicles. Pump-jet propulsion underwater vehicles are an important component of modern underwater vehicles. In future naval warfare, the key to victory will not only be advanced weaponry, but also high-performance pump-jet underwater vehicles. Therefore, further optimization is still needed in the research and manufacturing of pump-jet propulsion underwater vehicles.

[0005] Current pump-jet vectoring propulsion submarines suffer from problems such as high noise and low efficiency. Traditional vectoring thrusters, such as... Figure 1 As shown, 101 is the inlet, 102 is the blade, 103 is the pump casing, 104 is the guide vane, 105 is the guide cap, and 106 is the outlet. When the vector thruster is working, seawater enters through the inlet at 101, is accelerated by the high-speed rotation of the blade at 102, and is forced to flow axially, passing sequentially through the guide vane at 104, the guide cap at 105, and the outlet at 106. Most of the seawater flows along the blade from the front to the back of the blade, while a small amount of seawater flows through the gap between the blade at 102 and the pump casing at 103, deviating from the predetermined trajectory, forming a high-speed jet, generating noise, increasing leakage, and reducing pumping efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a combined submarine propulsion device for suppressing gap leakage, which optimizes and modifies the thruster using principles of fluid dynamics and electromagnetics to achieve low noise and high efficiency.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A combined submarine drive device for suppressing gap leakage includes a pump casing and blades disposed inside the pump casing. The pump casing has a pump inlet. A blade front cover plate is disposed around the blade. The blade front cover plate is fixedly connected to the outer periphery of the blade and there is no gap between the two. The blade front cover plate rotates together with the blade. The blade front cover plate and the pump casing have a gap in the radial direction, and a leakage flow channel is formed at the gap.

[0009] Multiple sets of external magnet assemblies are evenly arranged on the pump casing along the flow direction of the leakage channel, and multiple sets of internal magnet assemblies are evenly arranged on the front cover plate of the blade along the flow direction of the leakage channel. The positions of the external magnet assemblies and the internal magnet assemblies are corresponding and their polarities are opposite, thereby generating magnetic induction lines.

[0010] After seawater enters through the leakage channel, it cuts the magnetic induction lines generated by the outer and inner magnet components.

[0011] Furthermore, each set of external magnet assemblies consists of multiple external magnet pieces distributed along the circumference, and the external magnet pieces are fixed to the inner surface of the pump casing;

[0012] Each internal magnet assembly consists of multiple internal magnet pieces distributed along the circumference, which are fixed to the outer surface of the blade's front cover plate.

[0013] The outer magnet and the inner magnet are positioned opposite each other and have opposite polarities.

[0014] Furthermore, the outer magnet is embedded and fixed on the inner surface of the pump housing, so that the inner surface of the pump housing remains flat; the inner magnet is embedded and fixed on the outer surface of the blade front cover plate, so that the outer surface of the blade front cover plate remains flat.

[0015] Furthermore, the outer magnet is embedded and fixed on the inner surface of the pump housing, and the outer magnet protrudes from the inner surface of the pump housing;

[0016] The inner magnet is embedded and fixed on the outer surface of the blade front cover plate, and the inner magnet protrudes from the outer surface of the blade front cover plate.

[0017] Furthermore, each set of external magnet assemblies consists of an external magnet ring arranged along the circumference, and the external magnet ring is fixed to the inner surface of the pump casing;

[0018] Each set of inner magnet assemblies consists of an inner magnet ring arranged along the circumference, and the inner magnet ring is fixed to the outer surface of the blade front cover plate;

[0019] The outer magnetic ring and the inner magnetic ring are positioned opposite each other and have opposite polarities.

[0020] Furthermore, the outer magnet ring is embedded and fixed on the inner surface of the pump casing, so that the inner surface of the pump casing remains flat; the inner magnet ring is embedded and fixed on the outer surface of the blade front cover plate, so that the outer surface of the blade front cover plate remains flat.

[0021] Furthermore, the outer magnet ring is embedded and fixed on the inner surface of the pump housing, and the outer magnet ring protrudes from the inner surface of the pump housing;

[0022] The inner magnet ring is embedded and fixed on the outer surface of the blade front cover plate, and the inner magnet ring protrudes from the outer surface of the blade front cover plate.

[0023] Furthermore, the blade front cover plate is coaxially arranged with the pump casing, so that the blade front cover plate and the pump casing have equally spaced gaps in the radial direction, forming equally spaced leakage channels.

[0024] Furthermore, it also includes a monitoring system, which includes an ammeter, an upper wire connected to the front cover plate of the blades, and a lower wire connected to the pump casing. The upper and lower wires are respectively connected to the ammeter.

[0025] The beneficial effects of this invention are:

[0026] 1. This invention, by modifying the impeller component by adding a front cover plate and a magnetic structure, utilizes the principle of electromagnetic induction to suppress leakage flow in the submarine propulsion device, thereby reducing leakage and noise. This has significant value in improving the efficiency and stealth of the submarine propulsion device.

[0027] Since there is no gap between the blade and the blade cover, there is no tip clearance leakage. However, a new gap is added between the blade front cover and the pump casing. This part is the leakage channel for the leakage flow (seawater). When the leakage flow (seawater) passes through this leakage channel, it cuts the magnetic induction lines and generates the Lenz effect. The Ampere force induced by the induced current hinders the leakage of seawater, thereby improving efficiency and reducing the noise caused by the high-speed jet.

[0028] 2. The present invention also adds a monitoring system to monitor the fluid motion state inside the drive device, which can grasp the internal flow pattern of the drive device in real time under different motion conditions or during the transition of conditions, which is of great significance to the safety and stability of the submarine.

[0029] The monitoring system of this invention uses an ammeter to monitor the induced current and calculates the velocity of the fluid in the gap by measuring the magnitude of the induced current, thereby obtaining the leakage amount. This is the first design to estimate the leakage amount of a pump gap using the electromagnetic induction phenomenon, providing important support for future research and optimization of vector thrusters. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a pump-jet vector propulsion submarine in the prior art;

[0031] Figure 2 This is a schematic diagram of the present invention;

[0032] Figure 3 This is a schematic diagram illustrating the principle of the present invention.

[0033] Figure 2 and Figure 3 In the middle: 101: Pump inlet; 102: Blade; 201: Pump casing; 202: Blade front cover plate; 203: Outer magnet assembly; 204: Inner magnet assembly; 205: Leakage channel; 206: Magnetic induction line; 207: Upper wire connecting the ammeter and the blade front cover plate; 208: Lower wire connecting the ammeter and the pump casing; 209: Ammeter.

[0034] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Example 1:

[0037] like Figure 2 As shown, this embodiment discloses a combined submarine drive device for suppressing gap leakage, including a pump casing 201, a pump inlet 101, and blades 102, wherein: the pump casing 201 serves as the outer casing of the pump system, the pump inlet 101 serves as the inlet for external fluid to enter the pump system, and the blades 102 serve as the main medium for the pump system to transfer energy to seawater.

[0038] A blade front cover plate 202 is provided around the blade 102. The blade front cover plate 202 is fixedly connected to the outer periphery of the blade 101 and there is no gap between them. The blade front cover plate 202 rotates together with the blade 102.

[0039] The blade front cover plate 202 is coaxially arranged with the pump casing 201 and has equally spaced gaps in the radial direction, forming a leakage channel 205 at the gap.

[0040] Multiple sets of external magnet assemblies 203 are evenly arranged on the pump casing 201 along the flow direction of the leakage channel, and multiple sets of internal magnet assemblies 204 are evenly arranged on the front cover plate 202 of the blade along the flow direction of the leakage channel. The positions of the external magnet assemblies 203 and the internal magnet assemblies 204 are corresponding and their polarities are opposite (N pole to S pole, or S pole to N pole), thereby generating magnetic induction lines 206 at the leakage channel, providing magnetic field conditions for the occurrence of Ampere force.

[0041] Specifically, in this embodiment, each set of external magnet assemblies 203 consists of multiple external magnet pieces distributed along the circumference, and the external magnet pieces are fixed to the inner surface of the pump housing 201. Each set of internal magnet assemblies 204 consists of multiple internal magnet pieces distributed along the circumference, and the internal magnet pieces are fixed to the outer surface of the blade front cover plate 202. The external magnet pieces and internal magnet pieces are positioned oppositely and have opposite polarities.

[0042] The outer and inner magnets are fixed by embedding. The outer magnet is embedded in the inner surface of the pump housing 201, keeping the inner surface of the pump housing 201 flat; the inner magnet is embedded in the outer surface of the blade front cover 202, keeping the outer surface of the blade front cover 202 flat. This planar fixing method reduces noise. Depending on the application scenario of the submersible, if lower noise requirements are even higher, the planar fixing method of this embodiment will be selected.

[0043] This invention adds a blade front cover plate 202 to the traditional vector thruster and adds a magnetic structure between the blade front cover plate 202 and the pump casing 201. This magnetic structure is used to provide a gap magnetic field. Since there is no gap between the blade 101 and the blade cover plate 202, there is no tip gap leakage. However, a new gap is added between the blade front cover plate 202 and the pump casing 201. This part is the leakage channel 205 for the leakage flow (seawater). When the leakage flow (seawater) passes through the leakage channel 505, it cuts the magnetic induction lines, generating the Lenz effect. The Ampere force induced by the induced current hinders the leakage of seawater, thereby improving efficiency and reducing noise caused by high-speed jet.

[0044] Specifically, the principle by which leaked (seawater) cuts magnetic induction lines when passing through leak channel 505 is as follows: Figure 3 As shown, the outer magnet assembly 203 and the inner magnet assembly 204 generate magnetic induction lines 206 at the leakage channel 205, forming a uniformly distributed magnetic field. When seawater passes through the leakage channel 205, it is equivalent to cutting the magnetic induction lines 206. According to Faraday's law of electromagnetic induction, a conductor cutting magnetic induction lines will generate an induced current. The induced current is conducted circumferentially along the pump's rotation axis. Due to the presence of the induced current, the magnetic field exerts an Ampere force on the seawater. This force acts in the opposite direction to the flow, thus suppressing leakage within the gap channel. When the submarine moves at high speed, the fluid velocity at the gap increases, generating a larger Ampere force, which resists the high-speed jet generated by the micro-scale gap, reducing noise caused by the high-speed jet and improving stealth. At the same time, due to the reduction in leakage, the propulsion efficiency will increase.

[0045] In addition, this embodiment also includes a monitoring system, specifically comprising: an upper wire 207 connected to the front cover plate 202 of the blade, and a lower wire 208 connected to the pump casing 201. The upper wire 207 and the lower wire 208 conduct the induced current out of the system and transmit it to the ammeter 209. The velocity of the seawater passing through the leakage channel can be calculated based on the pointer deflection of the ammeter (I (current intensity) = B (magnetic induction intensity) × L (conductor length, circumference of the center of the gap) * v (seawater flow velocity) / R (ammeter resistance)). Therefore, the leakage amount can be estimated by the change in the ammeter, thereby understanding the internal flow of the pump system.

[0046] This allows for monitoring of the fluid motion state inside the drive unit, enabling real-time understanding of the internal flow patterns under different operating conditions or during condition transitions. This is of great significance for further understanding the internal flow mechanism of vector thrusters and is also crucial for the safety and stability of submarines.

[0047] The induced current is monitored by observing the pointer changes of ammeter 209, and the velocity of the interstitial fluid is calculated from the magnitude of the induced current, thus obtaining the leakage rate. Monitoring the leakage rate is of great significance for further understanding the internal flow mechanism of vector thrusters.

[0048] Example 2:

[0049] The difference between this embodiment and Embodiment 1 lies in the different fixing methods of the outer magnet assembly and the inner magnet assembly.

[0050] In this embodiment, after the outer magnet is inlaid and fixed, it should protrude from the inner surface of the pump housing. After the inner magnet is inlaid and fixed, it should protrude from the outer surface of the front cover plate of the blade.

[0051] The protruding fixing method described above provides better flow obstruction. Depending on the application scenario of the submersible, if greater flow obstruction is required, the protruding fixing method of this embodiment should be selected.

[0052] Example 3:

[0053] The difference between this embodiment and Embodiment 1 lies in the different compositions of the outer magnet assembly and the inner magnet assembly.

[0054] In this embodiment, each set of external magnet assemblies 203 consists of an external magnet ring arranged along the circumference. The external magnet ring is embedded and fixed on the inner surface of the pump housing 201, and the inner surface of the pump housing 201 is kept as a plane.

[0055] In this embodiment, each set of inner magnet assembly 204 consists of an inner magnet ring arranged along the circumference. The inner magnet ring is fixed to the outer surface of the blade front cover plate 202, and the outer surface of the blade front cover plate 202 is kept as a plane.

[0056] The outer magnetic ring and the inner magnetic ring are positioned opposite each other and have opposite polarities.

[0057] Example 4:

[0058] The difference between this embodiment and Embodiment 2 lies in the different compositions of the outer magnet assembly and the inner magnet assembly.

[0059] In this embodiment, each set of external magnet assemblies 203 consists of an external magnet ring arranged along the circumference. The external magnet ring is embedded and fixed on the inner surface of the pump housing 201, and the external magnet ring protrudes from the inner surface of the pump housing 201.

[0060] In this embodiment, each set of inner magnet assembly 204 consists of an inner magnet ring arranged along the circumference. The inner magnet ring is fixed to the outer surface of the blade front cover plate 202, and the inner magnet ring protrudes from the outer surface of the blade front cover plate 202.

[0061] The outer magnetic ring and the inner magnetic ring are positioned opposite each other and have opposite polarities.

[0062] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0063] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A combined submarine drive device for suppressing gap leakage, comprising a pump casing and blades disposed within the pump casing, the pump casing having a pump inlet, characterized in that: A blade front cover plate is provided around the blade. The blade front cover plate is fixedly connected to the outer edge of the blade and there is no gap between them. The blade front cover plate rotates together with the blade. There is a gap between the blade front cover plate and the pump casing in the radial direction, and a leakage flow channel is formed at the gap. Multiple sets of external magnet assemblies are evenly arranged on the pump casing along the flow direction of the leakage channel, and multiple sets of internal magnet assemblies are evenly arranged on the front cover plate of the blade along the flow direction of the leakage channel. The positions of the external magnet assemblies and the internal magnet assemblies are corresponding and their polarities are opposite, thereby generating magnetic induction lines. After seawater enters through the leakage channel, it cuts the magnetic induction lines generated by the outer and inner magnet components.

2. The combined submarine propulsion device for suppressing gap leakage according to claim 1, characterized in that: Each set of external magnet assemblies consists of multiple external magnet pieces distributed along the circumference, and the external magnet pieces are fixed to the inner surface of the pump casing; Each internal magnet assembly consists of multiple internal magnet pieces distributed along the circumference, which are fixed to the outer surface of the blade's front cover plate. The outer magnet and the inner magnet are positioned opposite each other and have opposite polarities.

3. A combined submarine propulsion device for suppressing gap leakage according to claim 2, characterized in that: The outer magnet is embedded and fixed on the inner surface of the pump casing, so that the inner surface of the pump casing remains flat; the inner magnet is embedded and fixed on the outer surface of the blade front cover plate, so that the outer surface of the blade front cover plate remains flat.

4. A combined submarine propulsion device for suppressing gap leakage according to claim 2, characterized in that: The outer magnet is embedded and fixed on the inner surface of the pump casing, and the outer magnet protrudes from the inner surface of the pump casing. The inner magnet is embedded and fixed on the outer surface of the blade front cover plate, and the inner magnet protrudes from the outer surface of the blade front cover plate.

5. A combined submarine propulsion device for suppressing gap leakage according to claim 1, characterized in that: Each set of external magnet assemblies consists of an external magnet ring arranged along the circumference, and the external magnet ring is fixed to the inner surface of the pump casing; Each set of inner magnet assemblies consists of an inner magnet ring arranged along the circumference, and the inner magnet ring is fixed to the outer surface of the blade front cover plate; The outer magnetic ring and the inner magnetic ring are positioned opposite each other and have opposite polarities.

6. A combined submarine propulsion device for suppressing gap leakage according to claim 5, characterized in that: The outer magnet ring is embedded and fixed on the inner surface of the pump casing, so that the inner surface of the pump casing remains flat; the inner magnet ring is embedded and fixed on the outer surface of the blade front cover plate, so that the outer surface of the blade front cover plate remains flat.

7. A combined submarine propulsion device for suppressing gap leakage according to claim 5, characterized in that: The outer magnet ring is embedded and fixed on the inner surface of the pump casing, and the outer magnet ring protrudes from the inner surface of the pump casing. The inner magnet ring is embedded and fixed on the outer surface of the blade front cover plate, and the inner magnet ring protrudes from the outer surface of the blade front cover plate.

8. A combined submarine propulsion device for suppressing gap leakage according to any one of claims 1-7, characterized in that: The blade front cover plate is coaxially arranged with the pump casing, so that the blade front cover plate and the pump casing have equally spaced gaps in the radial direction, forming equally spaced leakage channels.

9. A combined submarine propulsion device for suppressing gap leakage according to any one of claims 1-7, characterized in that: It also includes a monitoring system, which includes an ammeter, an upper wire connected to the front cover plate of the blades, and a lower wire connected to the pump casing. The upper and lower wires are respectively connected to the ammeter.

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