Underwater vehicle power unit

Abstract

To provide an underwater vehicle power unit that improves the operability of an underwater vehicle having a single propeller and is less susceptible to external interference. [Solution] The underwater vehicle power unit includes a housing 1, a main shaft 2, and a push section, and a fairing 6 is installed on the push section outside the plane of rotation. The push section includes a propeller 4 and a guide plate 5, and the propeller and guide plate are coaxial with the main shaft and are installed front to back in the longitudinal direction of the main shaft. A drive unit 3 is connected to one end of the main shaft away from the push section, and the drive unit includes a propeller, rotor hub, and rotor blades. The rotor hub has the rotor blades fixed uniformly in the radial direction at its outer edge. The rotor hub and main shaft are fixed, and the main shaft moves in conjunction to drive the rotor blades to rotate around its own axis. A plurality of guide plates are installed around the main shaft, and a housing and fairing are fixed to both ends of any of the guide plates.

Description

[Technical Field]

[0001] The present invention relates to the technical field of underwater vehicles, and more particularly to underwater vehicle power plants. [Background technology]

[0002] Currently, most commercially available underwater vehicles have a single propeller at the tail. The propeller's main function is to convert the power from the underwater vehicle's engine into forward or reverse propulsion. However, depending on the underwater tide, current direction, and current speed, a single propeller is subjected to pressure from water resistance in multiple directions, and the propellers' sizes vary. This significantly affects the propeller's thrust, resulting in a relatively large loss in power efficiency. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention aims to provide an underwater vehicle power unit that can solve the problems of the prior art, such as poor maneuverability and susceptibility to external interference in underwater vehicles with a single propeller. [Means for solving the problem]

[0004] The technical solution of this invention is as follows:

[0005] The underwater vehicle power unit includes a housing, a main shaft, and a push unit, and a fairing is installed on the push unit outside the rotation plane. The push unit includes a propeller and a guide plate, and the propeller and the guide plate are coaxial with the main shaft and are installed in the front and rear in the longitudinal direction of the main shaft. A drive unit is connected to one end of the main shaft away from the push unit. The drive unit includes the propeller, a rotor hub, and rotor blades. The rotor hub has rotor blades uniformly fixed to its outer edge in the radial direction. The rotor hub and the main shaft are fixed, and the main shaft moves in conjunction to drive the rotor blades to rotate about its own axis. A plurality of guide plates are installed around the main shaft, and the housing and the fairing are fixed to both ends of any one of the guide plates.

[0006] Preferably, the diameter of the smallest circumscribing circle of the guide plate projected in the axial direction is smaller than the diameter of the surface of rotation of the propeller, and the fairing is installed in a streamlined configuration projected along the radial direction on the housing.

[0007] Preferably, only nine guide plates are provided, and a water flow passage is formed between any two adjacent guide plates.

[0008] Preferably, the fairing is fixed to the housing (1) by a holder.

[0009] Preferably, the holder is provided in a plurality and configured as a stable surface, and the plurality of holders are stationary relative to the housing. [Effects of the Invention]

[0010] Compared with the prior art, the advantages of the present invention are as follows:

[0011] (1) In this invention, the propeller and the guide plate are installed coaxially. When the water current in the direction of travel of the underwater vehicle passes through the propeller, the propeller works on the water current, propelling the underwater vehicle forward, and also guides the water current into the water flow path formed by the guide plate. This not only reduces the impact of the water current from the side on the thrust, but also reduces the noise and vibration caused by bubble generation or bubble explosion, and improves the thrust energy, efficiency, and overall thrust. (2) In the present invention, the projected area of ​​the holder along the axial direction of the housing is smaller than the projected area of ​​the holder along the radial direction of the housing. Therefore, the resistance of the holder moving along the axial direction of the main shaft is much smaller than the resistance of the holder moving along the radial direction of the main shaft and the resistance of the holder winding in the opposite direction around the main shaft. This provides damping to the winding in the opposite direction of the underwater vehicle, allowing the underwater vehicle to maintain a straight posture and improving the maneuverability of the underwater vehicle. [Brief explanation of the drawings]

[0012] The present invention will be described in detail below with reference to the embodiments in conjunction with the drawings. [Figure 1] 1 is a cross-sectional view of an underwater vehicle power unit according to the present invention; [Figure 2] 1 is a diagram showing the configuration of a propeller according to the present invention; [Figure 3] 1 is a diagram showing the configuration of a fairing and a holder according to the present invention; [Figure 4] 1 is a diagram showing the configuration of a guide plate according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in more detail below with reference to specific examples.

[0014] As shown in Figures 1 to 4, the underwater vehicle power unit includes an externally installed housing 1, with a main shaft 2 penetrating the housing 1. One end of the main shaft 2 is connected to a drive unit 3, and the other end is installed outside the rear end of the housing 1 and is connected to a push unit. The drive unit 3 drives the main shaft 2 to rotate around its own axis in conjunction with the push unit, generating a pushing force.

[0015] When an underwater vehicle is moving, it is easily affected by turbulence from different directions. If turbulence along the radial direction of the housing 1 acts on the push section, the direction of the underwater vehicle's movement is likely to change. Therefore, in the present invention, the fairing 6 is installed on the outside of the push section, which can help reduce the influence of turbulence.

[0016] The fairing 6 has a circular cross section along the axial direction of the housing 1, so that when turbulent air acts on the fairing 6, it flows closely to the surface of the fairing 6 and gradually diffuses as it flows, reducing the impact force of the turbulent air on the push part.

[0017] Furthermore, by arranging the fairing 6 so that the cross section along the radial direction of the housing 1 is streamlined, it is possible to reduce the resistance force when the underwater vehicle is traveling. In this embodiment, the push portion includes the propeller 4 and the guide plate 5.

[0018] Among these, the propeller 4 and the guide plate 5 are coaxial with the main shaft 2 and are installed front to back along the length of the main shaft 2. The propeller 4 is rotated by the drive of the main shaft 2. When a water current in the direction in which the underwater vehicle is traveling passes through the propeller 4, the propeller 4 does work on the water current, causing the underwater vehicle to move forward and the water current to accelerate.

[0019] As shown in Figure 4, only nine guide plates 5 are installed, and both ends of each guide plate 5 are connected to the housing 1 and the fairing 6, respectively. In addition, a water flow passage is formed between adjacent guide plates 5, and the accelerated water flow passes through the water flow passage in the guide plates 5 before being pushed. Since the fairings 6 are installed in a streamlined configuration, the diameter of the smallest circumscribing circle of the guide plates 5 projected along the axial direction is smaller than the diameter of the rotation surface of the propeller 4.

[0020] As shown in FIG. 3 , in this embodiment, the fairing 6 is fixed to the housing 1 by holders 7. Only four holders 7 are installed, and they are configured in a cross shape. The holders 7 not only serve to fix the fairing 6 but also serve as a stabilizing surface. In this embodiment, the projected area of ​​the holders 7 along the axial direction of the housing 1 is smaller than the projected area of ​​the holders 7 along the radial direction of the housing 1. This means that the resistance experienced by the holders 7 when moving in the axial direction of the main shaft 2 is much smaller than the resistance to movement along the radial direction of the main shaft 2 and the resistance to counter-spinning around the main shaft 2. Therefore, the installation of the holders 7 provides damping against counter-spinning of the underwater vehicle, allowing the underwater vehicle to maintain a straight posture and improving the maneuverability of the underwater vehicle.

[0021] 2, the propeller 4 includes a rotor hub 42 and seven rotor blades 41 mounted around the rotor hub 42. In this embodiment, the rotor hub 42 and the rotor hub 42 are both mounted to cover the rear end of the main shaft 2. In other embodiments, the rotor hub 42 and the rotor hub 42 may be formed integrally with the main shaft 2.

[0022] Furthermore, when the propeller 4 disrupts the water flow, it can generate air bubbles. In this embodiment, the axial distance between the propeller 4 and the guide plates 5 is set to 13 mm. As the propeller 4 rotates, it pushes the water flow toward the end of the underwater vehicle, guiding the water flow into the water flow passages formed by only nine guide plates 5. After passing through the water flow passages, the water is pushed forward gently and uniformly by the pushed-out water flow. At the same time, air bubbles generated when the propeller 4 rotates are naturally discharged through only nine water flow passages, reducing noise and vibration caused by the destruction of the bubbles.

[0023] The above embodiments are merely intended to illustrate the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement it, and are not intended to limit the scope of protection of the present invention.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be realized in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any perspective, these embodiments should be regarded as illustrative rather than restrictive, and the scope of the present invention is limited not by the above description but by the claims, and it is intended to include any changes within the meaning and scope of the claims by equivalent substitution. [Explanation of symbols]

[0025] 1. Housing 2 spindle 3. Drive unit 4 propellers 41 Rotor 42 rotor hub 5 Guide Plate 6 Fairing 7 Holder

Claims

1. The device includes a housing (1), a main shaft (2), and a push portion. The pusher has a fairing (6) installed outside the plane of rotation. The push unit includes a propeller (4) and a guide plate (5), the propeller (4) and the guide plate (5) are coaxial with the main shaft (2) and are installed in the front-rear direction of the main shaft (2) in the longitudinal direction, and a drive unit (3) is connected to one end of the main shaft (2) remote from the push unit; The propeller (4) includes a rotor hub (42) and rotor blades (41), and the rotor hub (42) has rotor blades (41) fixed uniformly in the radial direction at its outer edge, and the rotor hub (42) and a main shaft (2) are fixed, and the main shaft (2) is interlocked to drive the rotor blades (41) to rotate about their own axis. a plurality of guide plates (5) are installed around the main shaft (2), and the housing (1) and the fairing (6) are fixed to both ends of any one of the guide plates (5).

2. The diameter of the smallest circumscribing circle of the guide plate (5) projected in the axial direction is smaller than the diameter of the rotation surface of the propeller (4), 2. The underwater vehicle power plant according to claim 1, wherein the fairing (6) is arranged in a streamlined configuration in radial projection on the housing (1).

3. 3. The underwater vehicle power plant according to claim 2, wherein only nine guide plates (5) are provided, and a water flow passage is formed between any two adjacent guide plates (5).

4. 2. The underwater vehicle power plant according to claim 1, characterized in that the fairing (6) is fixed to the housing (1) by a holder (7).

5. 5. The underwater vehicle power plant according to claim 4, characterized in that the holders (7) are installed in plurality and configured as a stabilizing surface, and the plurality of holders (7) are stationary relative to the housing (1).

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