CN219821744U - Gate rudder structure for ship - Google Patents

Abstract

The utility model relates to a gate rudder structure for a ship, which comprises a left rudder blade (1) and a right rudder blade (2), wherein the left rudder blade (1) and the right rudder blade (2) are symmetrically arranged on two sides of a propeller (3), the left rudder blade (1) comprises a left boss (11) and a left blade (12), the top end of the left boss (11) is connected with a ship body, and the bottom end of the left boss (11) is connected with the left blade (12); the right rudder blade (2) comprises a right boss (21) and a right blade (22), the top end of the right boss (21) is connected with the ship body, and the bottom end of the right boss (21) is connected with the right blade (22). Compared with the prior art, the gate rudder structure can reduce the noise of the propeller, increase the propulsion performance and protect marine organisms.

Description

Gate rudder structure for ship

Technical Field

The utility model relates to the technical field of ship equipment, in particular to a gate rudder structure for a ship.

Background

With the rapid development of the marine transportation industry and the ship technology, the continuous improvement of the ship-building technology and the increasing of the sailing speed make people to look at the noise limit of the ship. Therefore, the vibration reduction design and treatment are urgently needed for the ship, the influence of vibration and noise on the safety of the ship and the health of operators is reduced, and the normal living environment of marine organisms is maintained, so that the safety of the ship and the service life of the ship are improved.

According to the related information, the radiation noise of the ship mainly comprises three noise sources of machinery (main and auxiliary machines), a propeller, hydrodynamic force and the like, and the three noise sources respectively form mechanical noise, propeller noise and hydrodynamic force noise. At medium and high speeds, propeller noise is the dominant source of noise. There are different methods of reducing propeller noise for different propellers, such as jet, spray, changing blade shape or material, setting a favorable propeller position, etc.

Rudder equipment is an important device for controlling the course of a ship, and is used as a device for changing and maintaining the sailing direction on sailing equipment such as ships. The types of conventional rudders are classified into a conventional rudder, a balance rudder and a half balance rudder according to the difference in the positions of the rudder stock axes on the width of the rudder blade. The fixed mode according to the rudder is divided into a supporting rudder, a semi-suspension rudder and a suspension rudder. The shape of the rudder blade section can be divided into streamline and flat rudders. By changing the wake around the ship propeller by the conventional rudder, the abrasion of the propeller is reduced, and the noise of the propeller can be reduced while the overall performance is increased.

Chinese patent CN202180021757.7 discloses a rudder having left and right rudders disposed at both sides of a propeller of a ship, providing a rudder capable of reducing energy consumption of the ship in a sea course. In a rudder having a pair of left and right rudders disposed on both sides of a stern propeller, the rudder is formed by a 1 st rudder section extending in a left-right direction and a 2 nd rudder section extending in a straight line in an up-down direction in a rear view, a rudder chord length of the 2 nd rudder section in a front-rear direction is formed to 40% to 100% of a diameter of the propeller, the propeller is disposed between 15% and 65% of a rudder chord length from a front edge of the 2 nd rudder section in a side view, and a rudder shaft for driving the rudder is disposed at a position of 30% to 50% of the rudder chord length from the front edge of the 2 nd rudder section in a side view.

At present, a streamline rudder is commonly adopted by modern sea boats, the streamline rudder is formed by covering the periphery of a framework with a streamline compound plate, and the section of the streamline rudder is streamline. The good rudder performance of the rudder is mainly represented by: 1. the hydrodynamic performance is good, the lift coefficient is high, and the resistance coefficient is low; 2. the hollow watertight structure has high strength, can obtain certain buoyancy, and reduces the pressure on the rudder bearing.

As a ship appendage, an increase in drag is unavoidable. The additional resistance generated is also different for different stern shapes, rudder shapes and rudder mounting positions. The drag of a streamlined rudder is typically 1.5 times its own frictional drag. For friction resistance, the boundary layer generated by the bending of the rudder blade surface is separated to generate vortex, so that an external streamline is changed, the water flow speed is reduced, and the friction resistance is reduced to a certain extent. The increase in frictional resistance caused by the curved surface of the rudder blade is offset by the decrease in frictional resistance in the swirl zone.

In addition, the additional rudder changes the stern shape, so that the change of the viscous-pressure resistance of the ship body is more remarkable. Therefore, the rudder streamline should be designed with more attention to the back body shrinkage speed of the ship, if shrinkage is more moderate, the curved flow speed is slower, so that the separation phenomenon is delayed (or avoided), and the viscous pressure resistance caused by the back body shape can be reduced.

So based on empirical data, the ship type parameters should be designed with care: 1. the shrinkage of the back body is to be alleviated, and a large number of vortexes are avoided from being generated at the stern, so that the longitudinal streamline can be attached to the ship body when the rudder is designed, and the viscous-pressure resistance is reduced. 2. The hull curvature change should be avoided from becoming large, and the hull curve change is avoided from being too stiff in cross section, otherwise eddies are easily generated at the two shoulders which are too raised or recessed.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a gate rudder structure for ships, which can reduce the noise of a propeller, increase the propulsion performance and protect marine organisms.

The aim of the utility model can be achieved by the following technical scheme:

the gate rudder structure for ship includes one left rudder blade and one right rudder blade set symmetrically on two sides of the propeller,

the left rudder blade comprises a left boss and a left blade, the top end of the left boss is connected with the ship body, and the bottom end of the left boss is connected with the left blade;

the right rudder blade comprises a right boss and a right blade, the top end of the right boss is connected with the ship body, and the bottom end of the right boss is connected with the right blade.

In one embodiment of the utility model, the left boss and the right boss each comprise a rudder stock, an upper rudder bearing and a rudder stock sleeve, wherein the upper rudder bearing is arranged at the top end of the rudder stock sleeve, the rudder stock is arranged at the center of the rudder stock sleeve, the rudder stock penetrates through the upper rudder bearing, the upper rudder bearing is used for supporting the rudder stock, the rudder stock top end is provided with a rudder head, the top end of the rudder head is connected with the ship body, and the bottom end of the rudder stock sleeve is connected with the left rudder blade or the right rudder blade.

In one embodiment of the utility model, the left rudder blade or the right rudder blade is fixed to the bottom end of the rudder stock trunk by a vertical flange.

In one embodiment of the utility model, at least 6 bolts are used for connecting the vertical flanges, in order to prevent the bolts from slipping when the flange nuts fall off, the nuts should be downward during installation, a protection device for preventing the nuts from loosening is added, a cement pond is used as a standby means, a key block in the front-back direction is also required to be arranged between the flanges, a bushing (bronze or copper) is arranged at the friction position of the screw, and the whole gate rudder is born by an upper rudder bearing in a wear-resistant connection mode, but the installation, the construction and the disassembly are simpler, so that the mode is adopted.

In one embodiment of the utility model, the horizontal cross section of the top parts of the left boss and the right boss is square, and the side length of the square is 0.8235 times of the radius of the propeller.

In one embodiment of the utility model, the left boss and the right boss have a length 0.1935 times the side length of a square in the z direction, wherein z is in the depth direction.

In one embodiment of the present utility model, the nearest distance between the left boss and the right boss is 0.7500 times the side length of the square.

In one embodiment of the present utility model, the left and right blades are rounded blades.

In one embodiment of the utility model, the radius of the rounded corners is 0.7500 times the square side length.

In one embodiment of the utility model, the left blade is thicker near the left boss, the right blade is thicker near the right boss, and the ends of the left blade and the right blade away from the hull are gradually thinner.

In one embodiment of the utility model, the total width of the left and right rudder blades in the y-direction is 2.0875 times the square side length, wherein y is in the ship width direction.

In one embodiment of the utility model, the total length of the left rudder blade and the right rudder blade in the z direction is 3.6000 times the square side length, wherein z is along the water depth direction.

In one embodiment of the present utility model, the ratio of the length parameters of the left rudder blade and the right rudder blade in the x, y and z directions is set as a: d: e, 1.0000:2.0875:3.6000 where x is in the length direction, y is in the width direction and z is in the depth direction.

Compared with the prior art, the utility model has the following advantages:

1. compared with the traditional single common rudder, the gate rudder structure for the ship provided by the utility model has the advantages that compared with the defects that a single common rudder in deflection airflow of a propeller slipstream can cause airflow deviation, a wake peak is formed at the center of the ship, the ship resistance is increased, the performance of the propeller is reduced and the like, the gate rudder can form uniform flow to a greater extent, thrust is generated by utilizing rudder direction effect, and the transverse drift force is eliminated, and meanwhile, the application of the gate rudder can reduce the abrasion of the propeller to a certain extent;

2. the ability of a gate rudder to reduce propeller noise compared to a conventional rudder is based mainly on: the method comprises the steps that (1) propeller thrust required by the same navigational speed is smaller, (2) potential wake is not present beside a gate rudder, uniform wake can be generated in deflection airflow generated by stern propeller slipstream, (3) the gate rudder can enable water flow to smoothly slide through when the wake drifts to the rear of a ship, and unavoidable cavitation bubbles are guided to leave the surface of a rudder blade, so that cavitation phenomenon at the position is relieved;

3. the utility model has low construction cost, realizes the change of wake flow by improving the number and the position of rudder blades, improves the propulsion performance, prolongs the service life of the propeller, and simultaneously performs physical noise reduction of the propeller so as to achieve the effects of energy conservation, low carbon, environmental protection, good economy and marine ecology and marine organism protection;

4. the utility model adopts the arc form to smoothly transition the yz direction of the rudder instead of the right angle form, greatly reduces the viscous pressure resistance caused by the rudders in the left-right form at the two sides of the paddle, and reduces the friction resistance and the change of the viscous pressure resistance caused by the rudder blade at the stern and the streamline as much as possible while playing the role of rectifying and propelling.

Drawings

FIG. 1 is a three-dimensional perspective view of a gate rudder structure in the present utility model;

FIG. 2 is a schematic view of the structure of the gate rudder structure connected with the hull;

FIG. 3 is a front view of the gate rudder structure of the present utility model;

FIG. 4 is a front view of the gate rudder structure of the present utility model attached to a ship's hull;

FIG. 5 is a side view of the gate rudder structure of the present utility model attached to a ship's hull;

fig. 6 is a top view of the gate rudder structure of the present utility model.

Reference numerals illustrate: 1. left rudder blade, 11, left boss, 12, left blade, 2, right rudder blade, 21, right boss, 22, right blade, 3, screw, a, square side length, R, radius of screw, R, radius of rounded corner, b, left boss (right boss) length along z direction, c, nearest distance between left boss and right boss, d, total width of left rudder blade (right rudder blade) in y direction, e, total length of left rudder blade (right rudder blade) in z direction.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Examples

Referring to fig. 1 to 6, the present embodiment provides a gate rudder structure for a ship, comprising a left rudder blade 1 and a right rudder blade 2, the left rudder blade 1 and the right rudder blade 2 are symmetrically arranged at both sides of a propeller 3,

the left rudder blade 1 comprises a left boss 11 and a left blade 12, the top end of the left boss 11 is connected with the ship body, and the bottom end of the left boss 11 is connected with the left blade 12;

the right rudder blade 2 comprises a right boss 21 and a right blade 22, the top end of the right boss 21 is connected with the ship body, and the bottom end of the right boss 21 is connected with the right blade 22.

In this embodiment, the left boss 11 and the right boss 21 each include a rudder post, an upper rudder bearing and a rudder post sleeve, the top end of the rudder post sleeve is provided with the upper rudder bearing, the center of the rudder post sleeve is provided with the rudder post, the rudder post passes through the upper rudder bearing, the upper rudder bearing is used for supporting the rudder post, the top end of the rudder post is provided with a rudder head, the top end of the rudder head is connected with the hull, and the bottom end of the rudder post sleeve is connected with the left rudder blade 1 or the right rudder blade 2.

In this embodiment, the left rudder blade 1 or the right rudder blade 2 is fixed to the bottom end of the rudder trunk through a vertical flange.

In this embodiment, at least 6 bolts are used to connect the vertical flanges, so that the bolts will not slip down when the flange nuts fall off, the nuts should be turned down when installed, and a protection device for preventing the nuts from loosening is added, and a cement pond is used as a spare means, a key block in the front-rear direction should be installed between the flanges, and a bushing (bronze or copper) should be installed at the friction position of the screw rod to prevent wear.

In this embodiment, the top horizontal sections of the left boss 11 and the right boss 21 are square, and the side length a of the square is 0.8235 times of the radius r of the propeller.

In this embodiment, the length b of the left boss 11 and the right boss 21 along the z direction is 0.1935 times the side length a of the square, wherein z is along the depth direction.

In this embodiment, the nearest distance c between the left boss 11 and the right boss 21 is 0.7500 times the square side length a.

In this embodiment, the left blade 12 and the right blade 22 are rounded blades.

In this embodiment, the radius R of the rounded corner is 0.7500 times the square side length a.

In this embodiment, the left blade 12 is thicker near the left boss 11, the right blade 22 is thicker near the right boss 21, and the ends of the left blade 12 and the right blade 22 away from the hull are gradually thinner.

In this embodiment, the total width d of the left rudder blade 1 and the right rudder blade 2 in the y direction is 2.0875 times the square side length a, wherein y is along the ship width direction.

In this embodiment, the total length e of the left rudder blade 1 and the right rudder blade 2 in the z direction is 3.6000 times the square side length a, wherein z is along the water depth direction.

In this embodiment, the ratio of the length parameters of the left rudder blade 1 and the right rudder blade 2 in the x, y and z directions is set as a: d: e, 1.0000:2.0875:3.6000 where x is in the length direction, y is in the width direction and z is in the depth direction.

In this embodiment, as shown in fig. 1, a three-dimensional perspective view of one rudder blade is provided, in which a boss is used to connect with a hull, and the thickness of a gate rudder below the rudder blade is thinner as the gate rudder is farther from the hull;

as shown in fig. 3, which is a front view of the complete gate rudder, the distance between the left rudder blade 1 and the right rudder blade 2 can be seen in equal proportion;

as shown in fig. 4, the structure of the gate rudder applied to the periphery of the propeller can physically reduce the influence of noise of the propeller on marine organisms, and can change the wake flow after the ship to increase the performance of the propeller;

as shown in fig. 5, the length of the deep water rudder can be seen;

as shown in fig. 6, which shows a top view of one of the rudder blades, the size ratio of the boss and the rudder blade in the ship width direction can be seen, and the rounded double rudder She Zhamen design provides the basis for changing the ship wake.

In the present utility model, it is within the scope of the present utility model to simply modify the above description, for example, to change the length of the rudder blade in the water depth direction, the radius of the rudder blade rounding, the width of the rudder blade extending in the ship width direction, and other relevant parameters.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims (10)

1. The gate rudder structure for the ship is characterized by comprising a left rudder blade (1) and a right rudder blade (2), wherein the left rudder blade (1) and the right rudder blade (2) are symmetrically arranged at two sides of a propeller (3),

the left rudder blade (1) comprises a left boss (11) and a left blade (12), the top end of the left boss (11) is connected with the ship body, and the bottom end of the left boss (11) is connected with the left blade (12);

the right rudder blade (2) comprises a right boss (21) and a right blade (22), the top end of the right boss (21) is connected with the ship body, and the bottom end of the right boss (21) is connected with the right blade (22).

2. The gate rudder structure for ships according to claim 1, characterized in that the left boss (11) and the right boss (21) each comprise a rudder stock, an upper rudder bearing and a rudder stock sleeve, the top end of the rudder stock sleeve is provided with the upper rudder bearing, the center of the rudder stock sleeve is provided with the rudder stock, the rudder stock passes through the upper rudder bearing, the upper rudder bearing is used for supporting the rudder stock, the top end of the rudder stock is provided with a rudder head, the top end of the rudder head is connected with a ship body, and the bottom end of the rudder stock sleeve is connected with the left rudder blade (1) or the right rudder blade (2).

3. A marine rudder structure according to claim 1, wherein the top horizontal sections of the left boss (11) and the right boss (21) are square, and the side length (a) of the square is 0.8235 times the radius (r) of the propeller;

the length (b) of the left boss (11) and the right boss (21) along the z direction is 0.1935 times of the square side length (a), wherein z is along the water depth direction.

4. A rudder structure for a ship according to claim 3, characterized in that the nearest distance (c) between the left boss (11) and the right boss (21) is 0.7500 times the square side length (a).

5. A rudder structure for a ship according to claim 4, characterized in that the left blade (12) and the right blade (22) are rounded blades.

6. A rudder structure for a ship according to claim 5, wherein the radius (R) of the rounded corners is 0.7500 times the square side length (a).

7. A rudder structure for a ship according to claim 1, wherein the left blade (12) is thicker near the left boss (11), the right blade (22) is thicker near the right boss (21), and the ends of the left blade (12) and the right blade (22) distant from the hull are thinner gradually.

8. A gate rudder structure for a ship according to claim 3, wherein the total width (d) of the left rudder blade (1) and the right rudder blade (2) in the y-direction is 2.0875 times the square side length (a), wherein y is in the ship width direction.

9. A marine gate rudder structure according to claim 8, wherein the total length (e) of the left rudder blade (1) and the right rudder blade (2) in the z-direction is 3.6000 times the square side length (a), wherein z is in the water depth direction.

10. The marine gate rudder structure according to claim 9, wherein the ratio of length parameters of the left rudder blade (1) and the right rudder blade (2) in three directions of x, y, z is set to a: d: e, 1.0000:2.0875:3.6000 where x is in the length direction, y is in the width direction and z is in the depth direction.