CN112124545A

CN112124545A - Pod propeller capable of improving hydrodynamic performance and arrangement structure thereof

Info

Publication number: CN112124545A
Application number: CN202011091379.3A
Authority: CN
Inventors: 舒永东; 杜鹏; 陈代明; 高天; 谢堂海
Original assignee: Nanjing High Accurate Marine Equipment Co Ltd
Current assignee: Nanjing High Accurate Marine Equipment Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2020-12-25

Abstract

The utility model provides a can promote hydrodynamic property's nacelle propeller and arrangement structure thereof, nacelle propeller includes screw and nacelle underwater housing, nacelle underwater housing's top and hull connection, the tail end installation screw of nacelle underwater housing, this nacelle propeller structure still includes honeycomb duct, upper bracket and under bracing frame's one end respectively with nacelle underwater housing's upper portion, sub-unit connection, upper bracket and under bracing frame's the other end respectively with honeycomb duct upper portion, sub-unit connection, honeycomb duct suit in the periphery of screw, and with leave certain clearance between the screw. In the invention, the guide pipe can be supported by the upper support frame and the lower support frame, the section of the guide pipe is in an airfoil shape, and due to the large structure inlet area and the small structure outlet area of the guide pipe, the propeller has the advantages of increasing the propelling efficiency of the propeller and providing larger thrust under the same conditions of the propeller rotating speed, the propeller diameter, the propeller blade shape and the like.

Description

Pod propeller capable of improving hydrodynamic performance and arrangement structure thereof

Technical Field

The invention belongs to the technical field of cabin propellers, and particularly relates to a pod propeller structure capable of improving hydrodynamic performance and a hull arrangement form.

Background

Pod thrusters have been widely used in submersible service vessels, oil drilling platforms, tender vessels, shuttle and ro-ro vessels, ice breakers and some military vessels due to their low noise and low vibration. The pod type propeller arranges the propelling motor outside the cabin, the electric energy generated by the generator is transmitted to the motor arranged outside the cabin through a cable, and the motor directly drives the propeller to rotate so as to provide power for the ship.

However, due to the special requirements of part of ship types/working platforms, the propeller is required to have better thrust and sailing capability under the condition of a certain power of the main engine, and due to the structural limitation of part of ship types, the draught is not enough, so that the submergence of the propeller cannot be completely guaranteed.

Disclosure of Invention

The invention aims to provide a pod propeller capable of improving hydrodynamic performance and an arrangement structure thereof, aiming at the problems that part of ship-shaped/working platforms require better thrust and navigation performance under the condition of certain host power and the draft depth cannot completely guarantee that a propeller is immersed, and the hydrodynamic performance of the pod propeller is comprehensively improved.

The technical scheme of the invention is as follows:

the pod propeller comprises a propeller and a pod underwater shell, wherein the top of the pod underwater shell is connected with a ship body, the tail end of the pod underwater shell is provided with the propeller, the pod propeller structure further comprises a guide pipe, an upper support frame and a lower support frame, one end of the upper support frame and one end of the lower support frame are respectively connected with the upper part and the lower part of the pod underwater shell, the other end of the upper support frame and the other end of the lower support frame are respectively connected with the upper part and the lower part of the guide pipe, and the guide pipe is sleeved on the periphery of the propeller and is spaced from the propeller.

Furthermore, one end of the upper support frame and one end of the lower support frame are respectively connected with the upper part and the lower part of the underwater shell of the nacelle through bolts, and the other ends of the upper support frame and the lower support frame are respectively welded with the upper part and the lower part of the guide pipe.

Further, the clearance between the propeller and the draft tube is 0.04-0.06 times of the diameter D of the propeller.

Furthermore, the section of the wall of the flow guide pipe is wing-shaped.

Further, the area of the inlet F of the flow guide pipe is larger than that of the outlet E.

Furthermore, the width B of the flow guide pipe is 0.4-0.6 times of the diameter D of the propeller.

Further, the axis of the underwater pod shell forms an angle A with the horizontal line, and the angle A is 0-6 degrees.

Furthermore, zinc blocks are uniformly distributed on the guide pipe and the underwater shell of the nacelle.

An arrangement structure of pod propellers capable of improving hydrodynamic performance is characterized in that two pod propellers are symmetrically arranged on a stern relative to a central line, and one pod propeller is arranged in the center of the stern in the bow direction.

Further, two pod propellers symmetrically arranged on the stern about a central line are respectively inclined outwards by an angle C which is 0-6 degrees.

The invention has the beneficial effects that:

according to the invention, the guide pipe can be supported through the upper support frame and the lower support frame, the section of the guide pipe is wing-shaped, the width B of the guide pipe is optimally designed to be 0.4-0.6 times of the diameter of the propeller, the unilateral clearance between the inner diameter of the guide pipe and the diameter of the propeller is 0.04-0.06 times of the diameter of the propeller, and due to the fact that the structure of the guide pipe is large in inlet area and small in outlet area, when the rotating speed, the diameter, the blade shape and the like of the propeller are the same, the propulsion efficiency of the propeller can be increased and larger thrust force.

In the sailing process of the structure, the lower support frame can achieve the effect of blocking foreign matters in water, the underwater shell of the pod propeller forms a certain angle with the horizontal plane, and compared with the horizontal arrangement form, the arrangement form of the inclined structure can enable the position of the propeller to be inclined downwards so as to solve the problems that part of ship-shaped propellers is insufficient in draft and the propeller cannot be completely immersed.

According to the invention, two pod propellers are symmetrically arranged on the stern relative to the central line and used for providing main power for navigation of the ship, and one pod propeller is arranged in the center in the bow direction and used for steering the ship in a narrow water channel, so that the overall arrangement has better thrust and the navigation capability is effectively improved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is an enlarged schematic view of the draft tube of the present invention;

FIG. 3 is a schematic aft view of the present invention deployed on a vessel;

fig. 4 is a schematic bottom view of the arrangement of the invention on a vessel.

In the figure: the device comprises a guide pipe 1, a propeller 2, an upper support frame 3, a lower support frame 4, a pod underwater shell 5, a zinc block 6, a pod underwater shell A, a guide pipe B, a propeller C, a propeller D, a propeller E, an outlet of the guide pipe and an inlet of the guide pipe F, wherein an angle formed by the axis of the pod underwater shell A and the horizontal line is formed, the width of the guide pipe B, the outward inclination angle of the pod propeller C.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.

As shown in fig. 1, a pod thruster capable of improving hydrodynamic performance comprises a propeller 2 and a pod underwater housing 5, wherein the top of the pod underwater housing 5 is connected with a ship body, the propeller 2 is installed at the tail end of the pod underwater housing 5, the pod thruster structure further comprises a guide pipe 1, an upper support frame 3 and a lower support frame 4, one end of the upper support frame 3 and one end of the lower support frame 4 are respectively connected with the upper part and the lower part of the pod underwater housing 5, the other end of the upper support frame 3 and the other end of the lower support frame 4 are respectively connected with the upper part and the lower part of the guide pipe 1, the guide pipe 1 is sleeved on the periphery of the propeller 2, and a certain gap is reserved between the guide pipe 1 and the propeller.

In the embodiment, a draft tube 1 is arranged at the stern part of a pod propeller, one ends of an upper support frame 3 and a lower support frame 4 are respectively connected with the upper part and the lower part of an underwater pod shell 5 through bolts, and the other ends of the upper support frame 3 and the lower support frame 4 are respectively welded with the upper part and the lower part of the draft tube 1; the existence of the flow guide pipe can increase the propelling efficiency of the propeller and provide larger thrust.

Further, as shown in fig. 2, the cross-sectional shape of the wall of the draft tube 1 is an airfoil shape; the area of the inlet F of the flow guide pipe is larger than that of the outlet E.

In the embodiment, the structure of the flow guide pipe is designed to be large in inlet area and small in outlet area, and when the rotating speed, the diameter, the blade profile and the like of the propeller are the same, the existence of the flow guide pipe can increase the propelling efficiency of the propeller and provide larger thrust.

Further, the clearance between the propeller 2 and the draft tube 1 is 0.04-0.06 times of the diameter D of the propeller 2; preferably 0.06 times; the width B of the draft tube 1 is 0.4-0.6 times of the diameter D of the propeller 2; preferably 0.5 times; the underwater shell part of the cabin is in a structural form that the ship bow direction is inclined upwards by a certain angle A (A is 0-6 degrees), and preferably 5 degrees.

In the embodiment, the underwater shell part is designed into an inclined structure, and compared with a horizontal arrangement form, the arrangement form can enable the position of the propeller to be inclined downwards so as to solve the problems that the partial ship type draft is not enough and the propeller cannot be completely immersed.

Furthermore, zinc blocks 6 are uniformly distributed on the draft tube 1 and the underwater pod shell 5 to serve as sacrificial anode protection.

As shown in fig. 3 and 4, in an arrangement structure of pod propellers capable of improving hydrodynamic performance, two pod propellers are symmetrically arranged on a stern with respect to a center line, and one pod propeller is arranged at the center in a fore direction; for two pod propellers symmetrically arranged on a stern relative to a central line, the two pod propellers are respectively inclined outwards by an angle C, and the angle C is 0-6 degrees.

In the embodiment, two pod propellers are symmetrically arranged on the stern about a central line and used for providing main power for navigation of the ship, one pod propeller is arranged in the center in the fore direction and used for steering the ship in a narrow water channel, and the overall arrangement has better thrust and effectively improves navigation capacity.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pod thruster for improving hydrodynamic performance, which comprises a propeller (2) and a pod underwater housing (5), wherein the top of the pod underwater housing (5) is connected with a ship body, the tail end of the pod underwater housing (5) is provided with the propeller (2), and the pod thruster is characterized in that: the nacelle propeller structure further comprises a guide pipe (1), an upper support frame (3) and a lower support frame (4), one ends of the upper support frame (3) and the lower support frame (4) are respectively connected with the upper portion and the lower portion of the nacelle underwater shell (5), the other ends of the upper support frame (3) and the lower support frame (4) are respectively connected with the upper portion and the lower portion of the guide pipe (1), the guide pipe (1) is sleeved on the periphery of the propeller (2), and a certain gap is reserved between the propeller (2).

2. The pod propeller capable of improving hydrodynamic performance according to claim 1, wherein one end of the upper support frame (3) and one end of the lower support frame (4) are respectively connected with the upper portion and the lower portion of the underwater pod shell (5) through bolts, and the other end of the upper support frame (3) and the other end of the lower support frame (4) are respectively welded with the upper portion and the lower portion of the draft tube (1).

3. The pod thruster for improving hydrodynamic performance according to claim 1, wherein the clearance between the propeller (2) and the draft tube (1) is 0.04 to 0.06 times the diameter D of the propeller (2).

4. The pod thruster for improving hydrodynamic performance according to claim 1, characterized by the fact that the duct (1) has a wing-shaped cross-section.

5. The pod thruster for improving hydrodynamic performance according to claim 1 or 4, characterized by the fact that the area of the inlet F of the draft tube (1) is greater than the area of the outlet E.

6. The pod thruster for improving hydrodynamic performance according to claim 1, characterized by the width B of the draft tube (1) being 0.4-0.6 times the diameter D of the propeller (2).

7. The pod thruster for improving hydrodynamic performance according to claim 1, characterized by the fact that the axis of the pod underwater housing (5) makes an angle a with the horizontal, said angle a being 0-6 °.

8. The pod thruster for improving hydrodynamic performance according to claim 1, characterized in that zinc blocks (6) are arranged on the draft tube (1) and the pod underwater housing (5).

9. An arrangement of a pod thruster for providing improved hydrodynamic performance as claimed in any one of claims 1 to 8, characterized by: two pod propellers are symmetrically arranged on the stern about a center line, and one pod propeller is arranged at the center in the fore direction.

10. The arrangement structure of pod propellers with hydrodynamic performance enhancement according to claim 9, characterized by that for two pod propellers symmetrically arranged around the center line on the stern, they are respectively inclined outward by an angle C of 0-6 °.