CN212373628U

CN212373628U - Nacelle propeller underwater part anti-vortex structure

Info

Publication number: CN212373628U
Application number: CN202021100206.9U
Authority: CN
Inventors: 杜鹏; 舒永东; 高天; 陈代明; 谢堂海
Original assignee: Nanjing High Accurate Marine Equipment Co Ltd
Current assignee: Nanjing High Accurate Marine Equipment Co Ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-01-19
Anticipated expiration: 2030-06-15

Abstract

The utility model discloses a nacelle propeller is vortex-resistant structure of part under water, nacelle propeller underwater part is including box and propeller shell under water, the outside of box is equipped with vortex-resistant helix under water, the propeller shell is connected to the below of box under water, the afterbody of propeller shell is equipped with the water conservancy diversion cap, and is equipped with on the water conservancy diversion cap and stabilizes the fin. The underwater vortex-preventing structure of the pod propeller can effectively reduce the generation of Karman vortex caused by water flow passing through the underwater shell of the symmetrical pod propeller, and the tail part of the pod propeller is provided with the stabilizing fin to stabilize the water flow vortex caused by the rotation of the propeller and reduce vibration.

Description

Nacelle propeller underwater part anti-vortex structure

Technical Field

The utility model relates to an anti-vortex structure technical field specifically is an anti-vortex structure of nacelle propeller underwater part.

Background

The pod propeller device is a novel electric propeller, a motor is arranged outside a cabin and integrated with an underwater shell of the propeller, and the motor directly drives a propeller shaft to drive a propeller to rotate so as to provide power for a ship.

Because nacelle propeller unique towed propeller mode, rivers pass through the propeller part under water after rotatory paddle earlier, and certain vortex can take place for rivers behind the paddle, in addition because nacelle propeller part under water is bilateral symmetry structure form usually, produces karman vortex and vibration easily, and these two parts vortex effect superposes the back, has produced great vortex and vibration, and to a great extent reduces propeller hydrodynamic force characteristic. In addition, the pod propeller drives water flow in the rotating process of the propeller, vortex is formed at the tail part, vibration is generated, and the comfort of ship navigation is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the existing pod propeller easily generates karman vortex and vibration in the screw rotation process, influences the hydrodynamic characteristic of the propeller, and provides an anti-vortex structure with simple structure and convenient manufacture, so as to carry out vortex elimination on the underwater part of the pod propeller.

The utility model provides a following technical scheme:

the utility model provides a nacelle propeller underwater portion anti-vortex structure, nacelle propeller underwater portion includes box and propeller shell under water, the outside of box is equipped with anti-vortex helix under water, the propeller shell is connected to the below of box under water, the afterbody of propeller shell is equipped with the water conservancy diversion cap, and is equipped with on the water conservancy diversion cap and stabilizes the fin.

Further, the vortex-preventing spiral line spirally rises around the lower box body, so that the underwater box body forms a left-right asymmetric structure.

Further, the vortex preventing spiral line is welded or cast on the peripheral wall of the lower box body.

Furthermore, the stabilizing fin is connected with the flow guiding cap in a seamless mode, and the stabilizing fin is of a solid structure as a whole.

Furthermore, the cross section of the stabilizing fin is in a water drop shape, and the cross section of the stabilizing fin is gradually reduced from the end connected with the flow guide cap to the end far away from the flow guide cap.

Furthermore, the tail of the stabilizing fin, namely one end close to the tail of the deflector cap, extends vertically and downwards, and the end far away from the tail end of the deflector cap extends towards the tail from top to bottom in an inclined manner.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model can make the underwater box body form a left and right asymmetric structure through the vortex-proof spiral line structure developed by hydrodynamic design; the generation of Karman vortex caused by water flow passing through the underwater shell of the symmetrical pod propeller can be effectively reduced, and the propulsion resistance is reduced.

The utility model discloses a afterbody at the nacelle propeller sets up stabilizes the fin, and when the rotatory rivers vortex that drives of screw reachs nacelle propeller afterbody, the vortex is stabilized along with the type line on the surface of stabilizing the fin, reduces vibration and the noise that produces when the nacelle propeller moves.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic view of the cross-sectional structure a-a of fig. 1 according to the present invention.

In the figure: 1. an underwater box body; 2. a vortex-preventing helix; 3. a flow guide cap; 4. stabilizing the fins; 5. a propeller housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an anti-vortex structure for an underwater part of a pod propeller comprises an underwater box body 1 and a propeller shell 5, wherein an anti-vortex spiral line 2 is arranged on the outer side of the underwater box body 1, the propeller shell 5 is connected below the underwater box body 1, a flow guide cap 3 is arranged at the tail part of the propeller shell 5, and stabilizing fins 4 are arranged on the flow guide cap 3; the vortex-proof spiral line 2 is welded or cast on the peripheral wall of the lower box body 1; spirally rises around the lower box body 1, so that the underwater box body 1 forms a left-right asymmetric structure; the shape structure of the vortex-proof spiral line 2 can destroy the tension of water flow at the left end and the right end of the underwater box body 1 when the water flow passes through, further reduce the resistance of the water flow, and reduce the karman vortex while meeting the hydrodynamic characteristics of the propeller.

Further, the stabilizing fin 4 is connected with the deflector cap 3 in a seamless manner, and the stabilizing fin 4 is of a solid structure as a whole; the section of the stabilizing fin 4 is in a water drop shape, and the section of the stabilizing fin gradually becomes smaller from the end connected with the flow guiding cap 3 to the end far away from the flow guiding cap 3; the tail part of the stabilizing fin 4, namely one end close to the tail part of the deflector cap 3, vertically extends downwards, and the end far away from the tail end of the deflector cap 3 obliquely extends towards the tail part from top to bottom; when the water flow vortex driven by the rotation of the propeller reaches the tail part of the pod propeller, the vortex is stabilized along the profile on the surface of the stabilizing fin 4, so that the vibration and noise generated when the pod propeller runs are reduced.

The working principle is as follows: when the nacelle propeller underwater part vortex-preventing structure is used, firstly, water flow passes through the propeller and then passes through the underwater part of the propeller shell 5, certain vortex can be generated after passing through the propeller, at the moment, the formed vortex can be damaged by the flow guide cap 3 and the vortex-preventing spiral line 2 on the outer side of the underwater box body 1, the vortex is avoided, the vortex can be guided upwards by the vortex-preventing spiral line 2, and then the vortex-eliminating treatment can be carried out on the underwater part of the propeller shell 5, wherein the tail part of the diversion cap 3 is provided with stabilizing fins 4 which are connected seamlessly, the cross section of each stabilizing fin 4 is in a water drop shape, and gradually becomes smaller from top to bottom, the tail part vertically extends downwards, the front part obliquely extends backwards from top to bottom, when the water flow vortex driven by the rotation of the propeller reaches the tail part of the nacelle propeller shell 5, the vortex is stabilized along the profile on the surface of the stabilizing fin 4, so that the vibration and noise generated when the nacelle propeller shell 5 runs are reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An anti-vortex structure of an underwater part of a pod propeller is characterized in that: nacelle propeller underwater portion includes box (1) and propeller shell (5) under water, the outside of box (1) is equipped with vortex-proof helix (2) under water, propeller shell (5) is connected to the below of box (1) under water, the afterbody of propeller shell (5) is equipped with water conservancy diversion cap (3), and is equipped with on water conservancy diversion cap (3) and stabilizes fin (4).

2. The structure of claim 1 for preventing vortex flow in an underwater portion of a pod propeller, wherein: the vortex-proof spiral line (2) spirally rises around the lower box body (1), so that the underwater box body (1) forms a left-right asymmetric structure.

3. The structure of claim 1 for preventing vortex flow in an underwater portion of a pod propeller, wherein: the vortex-proof spiral line (2) is welded or cast on the peripheral wall of the lower box body (1).

4. The structure of claim 1 for preventing vortex flow in an underwater portion of a pod propeller, wherein: the stabilizing fin (4) is connected with the diversion cap (3) in a seamless mode, and the stabilizing fin (4) is of a solid structure as a whole.

5. The structure of claim 1 for preventing vortex flow in an underwater portion of a pod propeller, wherein: the cross section of the stabilizing fin (4) is in a water drop shape, and the cross section of the stabilizing fin is gradually reduced from one end of the stabilizing fin connected with the flow guide cap (3) to the end far away from the flow guide cap (3).

6. The structure of claim 1 for preventing vortex flow in an underwater portion of a pod propeller, wherein: the tail of the stabilizing fin (4) is close to one end of the tail of the guide cap (3) and vertically extends downwards, and one end far away from the tail end of the guide cap (3) extends towards the tail from top to bottom in an inclined mode.