CN218141975U

CN218141975U - Convex single tail fin line structure

Info

Publication number: CN218141975U
Application number: CN202222378263.9U
Authority: CN
Inventors: 姚奉; 任灵; 姚智衡
Original assignee: Hubei Dongchuan Heavy Industry Co ltd
Current assignee: Hubei Dongchuan Heavy Industry Co ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-12-27
Anticipated expiration: 2032-09-07

Abstract

A downward convex single tail fin type line structure comprises a single tail fin, wherein the single tail fin protrudes downwards to form a downward convex single tail fin, a longitudinal profile line of the downward convex single tail fin comprises a downward convex single tail line bottom line, an inner and outer break line and a tail end circular line, the downward convex single tail line bottom line and the inner and outer break line are both arc smooth curves, the tail end circular line is a straight line segment, and the inner and outer break line is a line connecting the downward convex single tail fin with a main ship body; the upward contour line of the downward convex single tail fin is a fusiform line with two pointed ends; the maximum width of the lower convex single tail fin is equal to 1.2-1.5 times of the width of the gear box, and the length of the lower convex single tail fin is 3.0-5.0 times of the sum of the length of the gear box, the length of the elastic coupling and the length of the host. The utility model is suitable for a boats and ships draft is less, and the great boats and ships of host computer power just have the ship type of installation major diameter screw, reduce host computer mounted position and make its operate steadily, can make the cabin vacate great space again.

Description

Convex single tail fin line structure

Technical Field

The utility model belongs to the technical field of boats and ships, in particular to protruding single tail fin type line structure down.

Background

In recent years, particularly at the present stage, the ship shape of the domestic inland river ship is developed quickly and is diversified, and the tail line type is like double tails, double ball tails, double skew tails, vortex tails, single tails, asymmetric ball tails, double tail fins and the like; the ship with the double-body type line has the advantages and disadvantages that the ship with the double-body type line is widely applied to ships with smaller carrying weight such as passenger ships and business ships, and the structure of the double-body type line ship is that two sheets are combined to form a special structure so that the two sheets are separated, and the engine gear box, the main engine, the matching turbine and the electrical equipment are distributed in the two sheets to form a structure which is far away from each other. The cabin is difficult to arrange, inconvenient to manage and operate, limited in cabin space and high in construction cost.

The existing ship, particularly a small public service ship, is generally small in depth, but needs high navigational speed, large in main engine power matching and large in propeller diameter, a propeller shaft system is inclined by a conventional design, the main engine is also installed at an inclined angle, the main engine is not favorable in operation stability, and vibration and noise are increased, so that the problem that the small public service ship is difficult to solve is solved. Therefore, the technical problem to be solved by the technical scheme is as follows: how to promote the overall stability of single tail fin hull, can also guarantee that host computer and screw have great installation space.

Disclosure of Invention

In view of the technical problem that the background art exists, the utility model provides a lower protruding single tail fin type line structure is applicable to the draft less, and the great boats and ships of host computer power just have the ship type of installation major diameter screw, reduce host computer mounted position and make its operate steadily, can make the cabin vacate great space again.

In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:

a downward convex single tail fin type line structure comprises a single tail fin, wherein the single tail fin protrudes downwards to form a downward convex single tail fin, a longitudinal profile line of the downward convex single tail fin comprises a downward convex single tail line bottom line, an inner and outer break line and a tail end circular line, the downward convex single tail line bottom line and the inner and outer break line are both arc smooth curves, the tail end circular line is a straight line segment, and the inner and outer break line is a line connecting the downward convex single tail fin with a main ship body; the upward contour line of the downward convex single tail fin is a fusiform line with two pointed ends; the maximum width of the lower convex single tail fin is equal to 1.2 to 1.5 times of the width of the gear box, and the length of the lower convex single tail fin is 3.0 to 5.0 times of the sum of the length of the gear box, the length of the elastic coupling and the length of the host. The total length is that the tail end, the middle section and the head section are combined to form a smooth shuttle-shaped large arc line.

In the preferred scheme, the horizontal line tangent to the lowest end of the bottom line of the lower convex single tail line is a bottom base line of the lower convex single tail line; the height between the bottom base line of the downward convex single-tail line and the base line of the main hull is the height of the downward convex single-tail fin, and the shafting center line of the propeller and the base line of the main hull are positioned on the same horizontal plane or lower than the base line of the main hull.

In the preferred scheme, the tail end face of the lower convex single tail fin is circular, and the diameter of the tail end face is equal to that of the tail pipe of the output shaft of the reduction gearbox.

In a preferred scheme, the distance between the base line of the main hull and the bottom of the tail part of the hull is equal to 1/2 of the diameter of the propeller, the clearance between the propeller and the bottom plate of the ship is added, and the clearance between the propeller and the bottom plate of the ship is added.

In a preferable scheme, the gear box and the main engine connected with the gear box sink to the lower convex single tail fin abdominal cavity for lowering the center of gravity of the ship body.

In a preferable scheme, 2.5 to 4.0 times of the height of the downward convex single tail fin is equal to the height of the main ship body.

This patent can reach following beneficial effect:

the lower convex single tail fin protrudes below the main ship body to form a half-body cavity which can accommodate the gear box and the main engine below a shafting center line. And has the following advantages: 1. a large diameter propeller may be used, which may improve propulsion efficiency. 2. The gravity center of the ship is reduced, and stability margin is improved. 3. Because the central line of the shafting is reduced, a small part of the gear box and the main engine is positioned below the main ship body, and the upper spaces of the gear box and the main engine are increased, thereby being beneficial to the arrangement of cabin equipment. 4. The ship has good hull line type, good rapidity and obvious energy-saving effect.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a longitudinal sectional profile line diagram of the lower convex single tail fin of the present invention;

FIG. 2 is a line drawing of the basic line profile of the main hull of the lower convex single tail fin of the present invention;

FIG. 3 is a cross-sectional profile line diagram of the lower convex single tail fin of the present invention;

fig. 4 is a line drawing of the hull of the utility model.

In the figure: the marine engine comprises a lower convex single-tail line bottom line 101, an inner and outer break-angle line 102, a tail end circular line 103, a lower convex single-tail line bottom base line 104, a main hull base line 105, a shafting center line 106, a main engine 107, a reduction gearbox 108 and a propeller 109.

Detailed Description

A preferred scheme is as shown in fig. 1 to 4, the lower convex single tail fin line structure comprises a single tail fin, the single tail fin protrudes downwards to form a lower convex single tail fin, a longitudinal profile line of the lower convex single tail fin comprises a lower convex single tail line bottom line, an inner and outer break angle line and a tail end circular line, the lower convex single tail line bottom line and the inner and outer break angle line are both arc smooth curves, the tail end circular line is a straight line segment, and the inner and outer break angle lines are lines connecting the lower convex single tail fin and a main hull; the upward contour line of the lower convex single tail fin is a fusiform line with two pointed ends; the maximum width D1 of the lower convex single tail fin is equal to 1.2 to 1.5 times of the width of the gear box, and the length L1 of the lower convex single tail fin is 3.0 to 5.0 times of the sum of the length of the gear box, the length of the elastic coupling and the length of the host. The lower convex single tail fin protrudes below the main ship body, the cross section area of the lower convex single tail fin is gradually reduced from the middle part to the two ends, and the length of the front end of the lower convex single tail fin forms a smooth streamline shape according to the width of the middle section, the diameter of the tail pipe outlet and the flow section of the front end inlet.

Further, a horizontal line tangent to the lowest end of the bottom line of the lower convex single tail line is a bottom base line of the lower convex single tail line; the height between the bottom base line of the downward convex single-tail line and the base line of the main hull is the height of the downward convex single-tail fin, and the shafting center line of the propeller and the base line of the main hull are positioned on the same horizontal plane or lower than the base line of the main hull. The height of the downward convex single tail fin is 2.5 to 4.0 times of the height of the main ship body. As shown in fig. 3, (1.2-1.5) × H2.

Furthermore, the tail end face of the downward-convex single tail fin is circular, and the diameter of the tail end face is equal to that of the tail pipe of the output shaft of the reduction gearbox. The distance L3 from the tail end surface of the lower convex single tail fin to the stern is defined by the rudder blade front edge, the propeller-rudder blade front edge gap, the propeller length, the sealing device length, the tail pipe extension and a proper gap. The cylindrical shape that the thin cutting of slope is become to the upper place forward of protruding single tail fin tail end face picture, the whole protruding single tail's of protruding cross section line type forms the water droplet and forms, the waterline is fusiformis streamline shape, the vertical section line is the thin flagging formula arc streamline shape of point, the head is the thin fusiformis streamline shape of point, tail section tip top tilt up, make tail section and the circular transition of terminal surface become mellow water droplet shape, the width of protruding single tail fin is only 1.2~1.5 times of gear box width under whole like this, can form one and make the screw come and flow smoothly, the protruding shape monomer line type that the viscous pressure resistance is very little, adopt left and right dog-ear line smooth and in the same direction to be connected with being connected of main hull.

Further, the distance H3 between the base line of the main hull and the bottom of the tail part of the hull is equal to 1/2 of the diameter of the propeller and the clearance between the propeller and the bottom plate of the ship. The utility model discloses a single tail fin of lower arch is with the reduction of shafting central line height, and only a small amount of rising at the hull afterbody hull bottom of a ship to the shafting central line is the centre of a circle, and screw radius + required and the clearance of bottom of a ship board just can adopt the screw of great diameter.

Further, the gear box and the main engine connected with the gear box sink to the lower convex single tail fin abdominal cavity, so that the center of gravity of the ship body is reduced, and stability margin of the ship is increased. The gear box and the host of current single tail fin ship type all are located the single tail line base line intelligence quotient that descends downwards, and the single tail fin that descends downwards of this ship type is protruding downwards for gear box and host computer lower half are located the single tail fin abdominal cavity that descends downwards.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a single tail fin type line structure under protruding, includes single tail fin, and single tail fin is protruding downwards has formed single tail fin under protruding, its characterized in that: the longitudinal profile line of the lower convex single tail fin comprises a lower convex single tail line bottom line, an inner and outer break angle line and a tail end circular line, the lower convex single tail line bottom line and the inner and outer break angle line are both arc smooth curves, the tail end circular line is a straight line segment, and the inner and outer break angle line is a line for connecting the lower convex single tail fin with the main hull; the upward contour line of the downward convex single tail fin is a fusiform line with two pointed ends; the maximum width of the lower convex single tail fin is equal to 1.2-1.5 times of the width of the gear box, and the length of the lower convex single tail fin is 3.0-5.0 times of the sum of the length of the gear box, the length of the elastic coupling and the length of the host.

2. The lower convex single tail fin line structure of claim 1, wherein: a horizontal line tangent to the lowest end of the bottom line of the lower convex single tail line is a bottom base line of the lower convex single tail line; the height between the bottom base line of the downward convex single-tail line and the base line of the main hull is the height of the downward convex single-tail fin, and the shafting center line of the propeller and the base line of the main hull are positioned on the same horizontal plane or lower than the base line of the main hull.

3. The lower convex single tail fin line structure of claim 1, wherein: the tail end face of the downward-convex single tail fin is circular, and the diameter of the tail end face is equal to that of the tail pipe of the output shaft of the reduction gearbox.

4. The lower convex single tail fin line structure of claim 2, wherein: the distance between the base line of the main hull and the bottom of the hull tail part is equal to 1/2 of the diameter of the propeller, the clearance between the propeller and the bottom plate of the ship is added, and the clearance between the propeller and the bottom plate of the ship is added.

5. The lower convex single tail fin line structure of claim 1, wherein: the gear box and the main machine connected with the gear box sink to the cavity of the lower convex single tail fin for lowering the center of gravity of the ship body.

6. The lower convex single tail fin line structure of claim 2, wherein: the height of the downward convex single tail fin is 2.5 to 4.0 times of the height of the main ship body.