Pod type gas-liquid two-phase pump jet propeller

Abstract

The invention provides a pod type gas-liquid two-phase pump jet propeller, which belongs to the technical field of ships and underwater propulsion, and comprises a pod type shell, paddles, a stator and a bubble generating chamber, the paddle, the stator and the bubble generating chamber are located on the same central axis, the stator is fixedly installed in the front end of the pod type shell and connected with the motor, the motor is connected with the rotating shaft, the rotating shaft is connected with the propeller hub, the paddle is installed on the rotating shaft, the bubble generating chamber is horizontally installed in the middle section of the propeller, and the bubble generating chamber is communicated with the gas channel. The gas channel is installed in the connector, the connector is connected with the pod type shell, and the nozzle is installed at the tail end of the pod type shell. The invention has the stamping effect advantage under the high-speed working condition and the pump jet propulsion characteristic under the low-speed working condition, has the characteristics of high propulsion efficiency, strong cavitation inhibition, wide working condition application range and the like, and is particularly suitable for carrying platforms such as bathyscapes, special ships and the like which need to consider both concealment and power performance.

Description

Technical Field

[0001] The invention belongs to the technical field of ships and underwater propulsion, and particularly relates to a pod-type gas-liquid two-phase pump-jet propulsor. Background Art

[0002] Podded propulsion is a new type of propulsion device. By installing the propeller in a separate pod, it reduces interference from the ship's structure on the propulsion system, improving propulsion efficiency and operational flexibility. Compared with traditional ship propulsion systems, podded propulsion offers greater maneuverability and adaptability, particularly in complex waters. It can provide more precise and stable propulsion, leading to its widespread use in special environments such as offshore and polar navigation.

[0003] The main advantage of podded propulsion is its adjustable mounting angle, which allows the propeller's operating direction to be adjusted within a certain range, thereby achieving more efficient navigation control without changing the overall structure of the ship. However, traditional podded propulsion still faces problems such as bubble generation and flow field instability. Especially under high-load operation, bubble generation can affect propulsion efficiency and even cause system noise problems.

[0004] As a new propulsion technology, the gas-liquid two-phase pump-jet propulsor can effectively reduce the impact of bubbles and improve the propulsor's operating efficiency. Through the optimized design of the gas-liquid two-phase flow, this propulsor can achieve smoother fluid dynamics during ship operation and reduce vortices and noise caused by bubble impact. However, traditional gas-liquid two-phase pump-jet propulsors still have the problem of being large and heavy. Especially in pod-type designs, how to reduce the weight and volume of the equipment while ensuring propulsion efficiency is a current research focus. Summary of the Invention

[0005] The purpose of the present invention is to provide a pod-type gas-liquid two-phase pump-jet propulsor, which improves the flow state of the fluid entering and leaving the propeller by optimizing the gas-liquid two-phase mixing mode, and reduces the instability of the flow field and pressure fluctuations.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A pod-type gas-liquid two-phase pump-jet propeller comprises: a pod-type shell, in which blades, a stator and a bubble generating chamber are installed, the blades, the stator and the bubble generating chamber are located on the same central axis, the stator is fixedly installed inside the front end of the pod-type shell, the stator is connected to the motor, the motor is connected to the rotating shaft, the rotating shaft is connected to the propeller hub, the blades are installed on the rotating shaft, the bubble generating chamber is horizontally installed in the middle section of the propeller, the bubble generating chamber is connected to the gas channel, the gas channel is installed inside the connector, the connector is connected to the pod-type shell, and a nozzle is installed at the tail end of the pod-type shell.

[0008] Furthermore, the bubble generating chamber is a hollow cylindrical structure, a wall surface of the bubble generating chamber is provided with a plurality of perforations, and a gap exists between the outer wall of the bubble generating chamber and the inner cavity of the pod-type shell.

[0009] Furthermore, the perforations on the wall of the bubble generating chamber have various pore diameters to further enhance the gas-liquid mixing effect.

[0010] Furthermore, the plurality of through holes provided on the wall surface of the bubble generating chamber are evenly distributed along the rotation axis and perpendicular to the wall surface of the bubble generating chamber, and the diameter of the through holes is 2 mm to 5 mm.

[0011] Furthermore, the bubble generating chamber is sealedly connected to the inner cavity of the pod-type housing.

[0012] Furthermore, the inner wall openings at both ends of the pod-type shell are in a trumpet shape, the diameter of one end of the pod-type shell is gradually expanding, and the diameter of the other end of the pod-type shell is contracting, the pod-type shell corresponding to the bubble generating chamber is cylindrical, and the water inlet diameter of the expanding end of the pod-type shell is larger than the water outlet diameter of the contracting end, so as to improve the power output of the propeller.

[0013] Furthermore, the connecting member is rotationally connected to the pod-type housing to control the propeller to achieve 360° rotation.

[0014] Furthermore, the nozzle is in a gradually expanding trumpet shape.

[0015] Furthermore, the nozzle is made of flexible material and is a nozzle with adjustable opening size, thereby improving the adaptability of the propeller.

[0016] Furthermore, the gas channel is connected to the hollow area, and there are two gas channels, which facilitates the control of gas flow.

[0017] The beneficial effects of the present invention are:

[0018] This invention utilizes an innovative gas-liquid two-phase flow system to effectively reduce the bubbles and vortices found in traditional propellers, thereby improving propulsion efficiency. The introduction of gas-liquid two-phase flow allows the propeller to maintain high operating stability under various operating conditions, reducing energy loss and noise caused by bubble generation.

[0019] By optimizing the gas-liquid two-phase mixing method, this invention improves the flow state of fluid entering and leaving the propeller, reducing flow field instability and pressure fluctuations. This design helps to increase the propeller's service life and maintenance efficiency, reducing damage and repair costs caused by vibration and bubble problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 It is a structural schematic diagram of the present invention.

[0021] Attachment Figure 2 It is a schematic diagram of the structure of the rotating shaft, hub, motor, stator and blades of the present invention.

[0022] Attachment Figure 3 It is a schematic structural diagram of the bubble generating chamber of the present invention.

[0023] In the accompanying drawings: 1. pod-type housing, 2. stator, 3. motor, 4. rotating shaft, 5. blade, 6. hub, 7. bubble generating chamber, 8. connector, 9. gas channel, 10. nozzle. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Example 1:

[0026] The present invention provides a pod-type gas-liquid two-phase pump-jet propulsor, which is applied to underwater vehicles, such as the attached Figure 1-2 As shown, it includes: a pod-type shell 1, in which blades 5, a stator 2 and a bubble generating chamber 7 are installed. The blades 5, the stator 2 and the bubble generating chamber 7 are located on the same central axis. The stator 2 is fixedly installed inside the front end of the pod-type shell 1, the stator 2 is connected to the motor 3, the motor 3 is connected to the rotating shaft 4, the rotating shaft 4 is connected to the hub 6, the blades 5 are installed on the rotating shaft 4, the bubble generating chamber 7 is horizontally installed in the middle section of the propeller, the bubble generating chamber 7 is communicated with the gas channel 9, the gas channel 9 is installed inside the connector 8, the connector 8 is connected to the pod-type shell 1, and a nozzle 10 is installed at the tail end of the pod-type shell 1.

[0027] As attached Figure 3As shown, the bubble generating chamber 7 is a hollow cylindrical structure, a wall surface of the bubble generating chamber 7 is provided with a plurality of perforations, and a gap exists between the outer wall of the bubble generating chamber 7 and the inner cavity of the pod-type housing 1 .

[0028] Specifically, the perforations on the wall of the bubble generating chamber 7 have various pore diameters to further enhance the gas-liquid mixing effect.

[0029] The plurality of through holes provided on the wall of the bubble generating chamber 7 are evenly distributed along the rotation axis and perpendicular to the wall of the bubble generating chamber, and the diameter of the through holes is 2 mm to 5 mm.

[0030] The bubble generating chamber is sealedly connected to the inner cavity of the pod-type housing 1 .

[0031] In this embodiment, the inner wall openings at both ends of the pod-type shell 1 are in the shape of a trumpet, the diameter of one end of the pod-type shell 1 is gradually expanding, and the diameter of the other end of the pod-type shell 1 is contracting, the pod-type shell 1 corresponding to the bubble generating chamber 7 is cylindrical, and the water inlet diameter of the expanding end of the pod-type shell 1 is larger than the water outlet diameter of the contracting end, so as to improve the power output of the propeller.

[0032] In this embodiment, the connecting member is rotationally connected to the pod-type housing 1 to control the propeller to achieve 360° rotation.

[0033] The nozzle 10 is in the shape of a gradually expanding trumpet. The nozzle 10 is made of a flexible material and is a nozzle with an adjustable opening size, thereby improving the adaptability of the propeller.

[0034] In this embodiment, the gas channel 9 is connected to the hollow area, and there are two gas channels 9 to facilitate the control of gas flow.

[0035] Example 2:

[0036] According to the pod-type gas-liquid two-phase pump-jet propeller described in Example 1, the inner wall openings at both ends of the pod-type shell 1 are trumpet-shaped, with the left end showing an expansion trend and the right end showing a contraction trend, and the water inlet diameter at the left end is larger than the water outlet diameter at the right end, so as to improve the power output of the propeller; a stator 2 is installed at the front end of the propeller, and the stator 2 is connected to the propeller inner cavity and the motor 3, and the blades 5 are arranged at the right end of the stator 2 and the left end of the bubble generating chamber 7, and the blades 5 are fixedly mounted on the rotating shaft 4, and the left end of the rotating shaft 4 is connected to the motor 3, and the right end is connected to the hub 6, and the stator 2 and the blades 5 are evenly distributed along the rotating shaft 4. A total of nine stators 2 are provided, and a total of seven blades 5 are provided, and the stator 2, the blades 5, the rotating shaft 4, the hub 6 and the motor 3 are on the same central axis;

[0037] In this embodiment, a bubble generating chamber 7 is provided in the propeller, which is located in the middle section of the propeller, adopts a hollow cylindrical design and is installed horizontally, and its wall is provided with a plurality of perforations, which are evenly distributed along the axis and perpendicular to the axis. The uniform distribution of the perforations can effectively enhance the mixing effect of the gas-liquid two-phase fluid, and the outer wall of the bubble generating chamber 10 and the inner cavity of the propeller retain a hollow area to ensure the generation of stable bubbles, which is beneficial to reduce energy loss; the left section of the bubble generating chamber 7 is connected to the inner cavity of the propeller, and a sealing device is provided at the connection to ensure that there is no leakage, thereby improving the mixing efficiency; the gas channel 9 is provided inside the connector 8, connecting the hollow area, and providing two gas channels 9 at the same time helps to control the gas flow; the connector 8 is provided on the outside of the top of the pod-type shell 1, which can control the propeller to rotate 360°, thereby improving the operability of the propeller; the nozzle 10 is provided at the end of the propeller, in a gradually expanding trumpet shape, with an opening angle of 10°, which can be changed according to actual conditions. A reasonable opening angle can effectively improve the bubble boosting performance and improve the efficiency of the propeller.

[0038] In this embodiment, when installing different components, it is ensured that the inner walls of the components are connected flush to ensure that the flow path in the propeller is smooth.

[0039] Example 3:

[0040] The pod-type gas-liquid two-phase pump-jet propulsor of this embodiment differs from that of embodiment 2 in that:

[0041] The inner wall of the bubble generating chamber 7 is provided with a perforation layout having various apertures to further enhance the gas-liquid mixing effect and improve the adaptability of the propeller under different loads.

[0042] For other structures, please refer to Example 2.

[0043] Example 4:

[0044] The pod-type gas-liquid two-phase pump-jet propulsor of this embodiment differs from that of embodiment 2 in that:

[0045] The nozzle of this embodiment can be made of flexible material, so that it can be set into a nozzle with adjustable opening size, making the propeller more adaptable.

[0046] For other structures, please refer to Example 2.

[0047] The propeller of the present invention innovatively integrates the gas-liquid two-phase ramjet engine and the pump-jet propulsion into an integrated design, combining the advantages of the ramjet effect under high-speed conditions and the pump-jet propulsion characteristics under low-speed conditions. It has the characteristics of high propulsion efficiency, strong cavitation suppression, and a wide range of working conditions. It is particularly suitable for carrier platforms such as submersibles and special ships that need to take into account both stealth and power performance.

[0048] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A pod-type gas-liquid two-phase pump-jet propulsor, characterized in that: include: A pod-type shell (1) is provided, wherein a blade (5), a stator (2) and a bubble generating chamber (7) are installed in the pod-type shell (1), wherein the blade (5), the stator (2) and the bubble generating chamber (7) are located on the same central axis, wherein the stator (2) is fixedly installed inside the front end of the pod-type shell (1), wherein the stator (2) is connected to the motor (3), wherein the motor (3) is connected to the rotating shaft (4), wherein the rotating shaft (4) is connected to the propeller hub (6), wherein the blade (5) is installed on the rotating shaft (4), wherein the bubble generating chamber (7) is horizontally installed in the middle section of the propeller, wherein the bubble generating chamber (7) is connected to the gas channel (9), wherein the gas channel (9) is installed inside the connector (8), wherein the connector (8) is connected to the pod-type shell (1), and wherein a nozzle (10) is installed at the tail end of the pod-type shell (1).

2. The podded gas-liquid two-phase pump-jet propulsor according to claim 1, characterized in that: The bubble generating chamber (7) is a hollow cylindrical structure. The wall surface of the bubble generating chamber (7) is provided with a plurality of perforations. There is a gap between the outer wall of the bubble generating chamber (7) and the inner cavity of the pod-type housing (1).

3. The podded gas-liquid two-phase pump-jet propulsor according to claim 2, characterized in that: The perforations on the wall of the bubble generating chamber (7) have various pore diameters to further enhance the gas-liquid mixing effect.

4. The podded gas-liquid two-phase pump-jet propulsor according to claim 3, characterized in that: The plurality of through holes arranged on the wall surface of the bubble generating chamber are evenly distributed along the rotation axis and perpendicular to the wall surface of the bubble generating chamber, and the diameter of the through holes is 2mm-5mm.

5. The podded gas-liquid two-phase pump-jet propulsor according to claim 2 or 3, characterized in that: The bubble generating chamber is sealedly connected to the inner cavity of the pod-type housing (1).

6. The podded gas-liquid two-phase pump-jet propulsor according to claim 5, characterized in that: The inner wall openings at both ends of the pod-type shell (1) are in a trumpet shape, the diameter of one end of the pod-type shell (1) is gradually expanding, and the diameter of the other end of the pod-type shell (1) is contracting, the pod-type shell (1) corresponding to the bubble generating chamber (7) is cylindrical, and the water inlet diameter of the expanding end of the pod-type shell (1) is larger than the water outlet diameter of the contracting end, so as to improve the power output of the propeller.

7. The podded gas-liquid two-phase pump-jet propulsor according to claim 6, characterized in that: The connecting piece is rotationally connected to the pod-type housing (1) to control the propeller to achieve 360-degree rotation.

8. The podded gas-liquid two-phase pump-jet propulsor according to claim 7, characterized in that: The nozzle (10) is in the shape of a gradually expanding trumpet.

9. The podded gas-liquid two-phase pump-jet propulsor according to claim 8, characterized in that: The nozzle (10) is made of flexible material and is a nozzle with adjustable opening size, thereby improving the adaptability of the propeller.

10. The podded gas-liquid two-phase pump-jet propulsor according to claim 9, characterized in that: The gas channel (9) is connected to the hollow area, and there are two gas channels (9) to facilitate the control of gas flow.

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