Combined submersible vehicle propelling device

Abstract

The invention provides a combined submersible vehicle propelling device, and belongs to the technical field of submersible vehicle propellers. The invention aims to adapt to different load working conditions and reduce the hydrodynamic noise of the propulsion system. The propeller comprises a propeller body, a propeller hub, a guide pipe and hub cap fins. The propeller hub is connected with the transmission shaft, the propeller and the hub cap fin are both installed on the propeller hub, and the hub cap fin is located in a rear flow field area of the propeller. The outer side of the propeller is sleeved with a guide pipe, the whole guide pipe is of an inward shrinkage structure, and the section of the guide pipe is in a wing shape. Through the coupling effect of the guide pipe and the hub cap fin, the flow field of the propeller is improved, the thrust and efficiency performance of the propeller are improved, the navigation energy consumption of the submersible vehicle is effectively reduced, and the guide pipe structure reduces the operation noise of a propelling system; meanwhile, the defects of a single device are overcome, the hub cap fin can guarantee the hydrodynamic performance of the ducted propeller under light load, the energy-saving performance of the hub cap fin under heavy load is improved through the guide pipe, and the good performance of the propelling device can be kept under different load working conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of submersible propulsion devices, and in particular relates to a combined submersible propulsion device. Background Art

[0002] Currently, the energy consumption of submarine navigation can be reduced by further improving the propulsion performance of the thrusters. To improve the performance of thrusters, improving existing thrusters and installing energy-saving appendages are a good way to improve the performance of thrusters.

[0003] A ducted propeller, or ducted propeller for short, consists of a conventional propeller and an external annular fairing. The duct improves the wake field behind the propeller and generates additional thrust. Compared to conventional propellers, it offers higher efficiency and improves the vibration performance of the submersible. It also maintains high efficiency even under high load conditions. The propeller boss cap fin (PBCF) is a hydrodynamic energy-saving device that places the same number of blades as the propeller on the propeller boss and rotates synchronously with the propeller. Since its invention in 1987, the boss cap fin has achieved significant energy-saving results on various submersibles. It is a very practical energy-saving device and, compared to other energy-saving devices, offers advantages such as simple installation, lightweight, safety, and practicality.

[0004] Currently, both domestic and international research focuses on installing ducts and hubcap fins on propellers, such as ducted propellers with hubcap fins. While ducted propellers offer excellent performance under heavy loads, the ducting can cause propeller performance to drop sharply under light loads. While hubcap fins, as energy-saving devices, can improve propeller performance by a certain percentage under varying loads, the propeller's inherent performance is relatively poor under heavy loads, resulting in insignificant energy savings and the generation of additional hydrodynamic noise.

[0005] In summary, it is urgent to design a device that can adapt to different load conditions and reduce the hydrodynamic noise of the propulsion system. Summary of the Invention

[0006] A brief overview of the present invention is provided below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify key or important aspects of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is simply to present certain concepts in a simplified form as a prelude to the more detailed description discussed later.

[0007] In view of this, in order to adapt to different load conditions and reduce the hydrodynamic noise of the propulsion system, the present invention provides a combined submersible propulsion device.

[0008] Solution: A combined submersible propulsion device, including a propeller, a hub, a duct and a hub cap fin;

[0009] The propeller hub is connected to the transmission shaft, the propeller and the hub cap fin are both mounted on the propeller hub, and the hub cap fin is located in the rear flow field area of ​​the propeller;

[0010] A duct is sleeved on the outside of the propeller. The duct is an inwardly contracted structure as a whole, and the cross section of the duct is an airfoil shape.

[0011] Furthermore, the propeller is located at the axial center of the catheter.

[0012] Furthermore, the number of fins of the boss cap fin is consistent with the number of blades of the propeller.

[0013] Furthermore, the fin diameter of the boss cap fin is less than 1 / 3 of the propeller blade diameter.

[0014] The present invention has the following beneficial effects compared to the prior art:

[0015] 1. This invention improves the propeller flow field through the coupling effect of the duct and the hub cap fin, enhancing the propeller thrust and efficiency, and effectively reducing the energy consumption of the submersible during navigation.

[0016] 2. The present invention overcomes the shortcomings of a single device. The boss cap fin ensures the hydrodynamic performance of the ducted propeller under light loads, while the duct improves the boss cap fin's energy efficiency under heavy loads, enabling the propulsion device to maintain good performance under different load conditions.

[0017] 3. The present invention effectively improves the additional hydrodynamic noise problem generated when the boss cap fin is working through the duct structure, thereby reducing the operating noise of the propulsion system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of a combined submersible propulsion device;

[0020] Figure 2 It is a cross-sectional view of a combined submersible propulsion device;

[0021] Figure 3 2 is a comparison chart of the hydrodynamic performance of the device of the present invention and the prototype ducted propeller under the same working conditions, G1- represents the device of the present invention.

[0022] In the figure: 1-propeller, 2-hub, 3-duct, 4-hub cap fin. DETAILED DESCRIPTION

[0023] To make the technical solutions and advantages of the embodiments of the present invention more clearly understood, exemplary embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be noted that the embodiments described are only a portion of the embodiments of the present invention, and are not an exhaustive list of all embodiments. It should be noted that the embodiments of the present invention and the features thereof may be combined with each other unless they conflict.

[0024] Example 1, reference Figure 1-2 To illustrate this embodiment, a combined submersible propulsion device includes a propeller 1, a hub 2, a guide tube 3 and a hub cap fin 4;

[0025] The hub 2 is connected to the transmission shaft, the propeller 1 and the hub cap fin 4 are both mounted on the hub 2, and the hub cap fin 4 is located in the rear flow field area of ​​the propeller 1;

[0026] A duct 3 is sleeved on the outside of the propeller 1. The duct 3 is an inwardly contracted structure as a whole, and the cross-section of the duct 3 is an airfoil shape.

[0027] Furthermore, the propeller 1 is located at the axial center of the duct 3 .

[0028] Furthermore, the number of fins of the boss cap fin 4 is consistent with the number of blades of the propeller 1 .

[0029] Furthermore, the fin diameter of the boss cap fin 4 is smaller than 1 / 3 of the blade diameter of the propeller 1 .

[0030] Example 2, reference Figure 1-3 To illustrate this embodiment, a combined submersible propulsion device is used. When the submersible is navigating, the propeller 1 starts to rotate, changing the surrounding flow field, causing a pressure difference between the front propeller and the rear propeller, thereby generating thrust; the duct 3 can also provide thrust in the flow field due to its own airfoil structure; in addition, since the inlet diameter of the duct 3 is large and the propeller 1 is at a smaller diameter position, this contraction structure increases the inlet flow velocity near the propeller 1, thereby improving the flow field environment of the propeller 1 under heavy load conditions, so that the propeller 1 maintains a high propulsion efficiency under heavy load conditions, and at the same time, the duct 3 can shield hydrodynamic noise to a certain extent, and the effect is better when the duct 3 is made of sound-absorbing material; the hub cap fin 4 is located in the rear flow field area of ​​the propeller 1, which can better recover the energy of the flow field behind the propeller and break up the hub vortex, reducing the torque of the propulsion system and allowing the hub cap to restore high pressure to provide additional thrust, thereby improving the propulsion efficiency of the propulsion system;

[0031] In the present invention, the flow field of the propeller 1 is changed by the mutual induction between the duct 3 and the boss cap fin 4, thereby improving the working flow field of the propeller 1, thereby increasing the thrust and efficiency of the entire propulsion device;

[0032] Under the same working conditions, the hydrodynamic performance of the device of the present invention is improved by 2% to 4% and the thrust is increased by 6% to 8% compared with the prototype ducted propeller.

[0033] Through the present invention, the defects of a single device are compensated. The boss cap fin can ensure the hydrodynamic performance of the ducted propeller under light load, and the duct improves the energy-saving performance of the boss cap fin under heavy load, so that the propulsion device can maintain good performance under different load conditions; through the coupling effect of the duct and the boss cap fin, the propeller flow field is improved, the propeller thrust and efficiency performance are enhanced, and the energy consumption of the submarine navigation is effectively reduced.

[0034] The duct structure of the present invention effectively improves the problem of additional hydrodynamic noise generated when the boss cap fin is working, thereby reducing the operating noise of the propulsion system.

[0035] Although the present invention has been described with respect to a limited number of embodiments, it will be apparent to those skilled in the art, having benefit of the foregoing description, that other embodiments are contemplated within the scope of the invention thus described. Furthermore, it should be noted that the language used in this specification has been selected primarily for readability and didactic purposes, rather than for the purpose of explaining or limiting the subject matter of the present invention. Consequently, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative rather than restrictive of the scope of the invention, which is defined by the appended claims.

Claims

1. A combined submersible propulsion device, characterized in that: It comprises a propeller (1), a propeller hub (2), a duct (3) and a hub cap fin (4); The propeller hub (2) is connected to the transmission shaft, the propeller (1) and the hub cap fin (4) are both mounted on the propeller hub (2), and the hub cap fin (4) is located in the rear flow field area of ​​the propeller (1); A duct (3) is sleeved on the outside of the propeller (1); the duct (3) is an inwardly contracted structure as a whole, and the cross-section of the duct (3) is an airfoil shape.

2. A combined submersible propulsion device according to claim 1, characterized in that: The propeller (1) is located at the axial center of the duct (3).

3. A combined submersible propulsion device according to claim 2, characterized in that: The number of fins of the hub cap fin (4) is consistent with the number of blades of the propeller (1).

4. A combined submersible propulsion device according to claim 3, characterized in that: The fin diameter of the boss cap fin (4) is less than 1 / 3 of the blade diameter of the propeller (1).

Images