KR102422894B1 - Water-jet propulsion system for ships - Google Patents

Abstract

The present invention relates to a water jet propulsion device for a ship, comprising: a water jet propulsion unit; and a bracket unit for mounting the propulsion unit to a ship, wherein the propulsion unit includes: an intake port and a duct having a drain port connected to the intake port; an impeller installed inside the duct; a steering nozzle rotatably installed left and right on the drain side of the duct; a nozzle operation unit connected to the steering nozzle and configured to rotate the steering nozzle left and right; a reverse propelling bucket installed on the steering nozzle to be vertically rotatable, disposed above the steering nozzle when rotating upward, and disposed behind the steering nozzle when rotating downward; and a bucket operation part connected to the reverse thrust bucket to rotate the reverse thrust bucket up and down, wherein the reverse thrust bucket rotates left and right together with the steering nozzle as it is coupled to the steering nozzle. Disclosed is a jet propulsion system.

Description

Water-jet propulsion system for ships}

The present invention relates to a water jet propulsion device for a ship, and more particularly, to a water jet propulsion device for a ship that propels a ship by using the repulsive force generated when water is sucked in and then sprayed.

As a prior art related to a water jet propulsion device for a ship, the Republic of Korea Patent Publication No. 10-2087312 (registered on March 4, 2020) "Propulsion system for ships" is proposed.

The prior art includes "an inlet guide sheet, a thruster, a nozzle assembly, and a reverse guide cap, wherein the inlet guide sheet is provided with a guide passage; the thruster has a housing and a propeller, and the inlet guide is provided at a front end of the housing. a seat is connected, the propeller is rotatably installed in the housing; the nozzle assembly includes a fixed nozzle and a steering nozzle, a front end of the fixed nozzle is connected to a rear end of the housing of the thruster, and the steering nozzle includes It is pivotably installed at the rear end of the fixed nozzle and can be beat to the left or right with respect to the fixed nozzle by driving a first driving source; both ends of the reverse guide cap are curved fluid guide inlets in the direction of the thruster are each provided, and the reverse guide cap is pivotally connected to the outer circumferential surface of the fixed nozzle so that the reverse guide cap can be vertically beaten between the first position and the second position with respect to the steering nozzle by driving the second driving source. and, when the reverse guide cap is in the first position, the reverse guide cap is located in an extension direction of the steering nozzle, and when the reverse guide cap is in the second position, the reverse guide cap is positioned in the steering nozzle a wing portion is provided on the outer circumferential surface of the steering nozzle, the first driving source is provided with a first hydraulic cylinder and a first piston rod, and the first hydraulic cylinder is installed on the inlet guide sheet, The first piston rod is telescopically installed in the first hydraulic cylinder, the rear end of the first piston rod is pivotally connected to the front end of the first connecting rod, and the rear end of the first connecting rod is the blade of the steering nozzle It is related to "a propulsion system for a ship that is pivotally connected to the part", and it is a technology that can greatly improve the maneuverability and safety of a ship.

The prior art allows the vessel to go backward by rotating the reverse guide cap downward to change the water flow ejected from the steering nozzle to be ejected forward, but the reverse guide cap covers both the left and right rotation sections of the steering nozzle. Since the reverse guide cap is inevitably large and heavy by having

[Document 1] Republic of Korea Patent Publication No. 10-2087312 (registered on March 4, 2020)

The present invention has been devised to solve the above problems, so that the bucket for reverse propulsion of the ship can be minimized, so that the operation of the reverse propulsion bucket is easy, and the resistance due to the reverse propulsion bucket during propulsion of the ship can be minimized. An object of the present invention is to provide a water jet propulsion device for a ship.

In addition, an object of the present invention is to provide a water jet propulsion apparatus for a ship that can be easily mounted on a ship, and can minimize the structural change of the ship for mounting and the reduction in strength of the ship due to this.

The problems to be solved by the present invention are not limited to the aforementioned problems. Other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

In order to solve the above problems, a water jet propulsion device for a ship according to an embodiment of the present invention includes: a water jet propulsion unit; and a bracket unit for mounting the propulsion unit to a ship, wherein the propulsion unit includes: an intake port and a duct having a drain port connected to the intake port; an impeller installed inside the duct; a steering nozzle rotatably installed left and right on the drain side of the duct; a nozzle operation unit connected to the steering nozzle and configured to rotate the steering nozzle left and right; a reverse propelling bucket installed on the steering nozzle to be vertically rotatable, disposed above the steering nozzle when rotating upward, and disposed behind the steering nozzle when rotating downward; and a bucket operation unit connected to the reverse thrust bucket and configured to rotate the reverse thrust bucket up and down, wherein the reverse thrust bucket rotates left and right together with the steering nozzle as it is coupled to the steering nozzle.

In an embodiment of the present invention, the steering nozzle includes a first discharge port open toward the rear and a second discharge port inclined toward the lower front, wherein the first discharge port rotates downward of the reverse propelling bucket. is closed, and the second discharge port maintains an open state when the reverse propelling bucket rotates downward.

In an embodiment of the present invention, the nozzle operation unit, a nozzle operation lever installed on the ship; a side bracket coupled to one side of the duct; a side tube having one end coupled to the side bracket and the other end extending toward the nozzle operation lever; and a nozzle inserted into the side tube so as to be moved forward and backward, one end exiting from one end of the side tube and coupled to one side of the steering nozzle, and the other end exiting from the other end of the side tube and coupled to the nozzle operation lever working rod;

In an embodiment of the present invention, the bucket operation unit, a bucket operation lever installed on the ship; an upper bracket coupled to the upper side of the duct; an upper tube having one end coupled to the upper bracket and the other end extending toward the bucket operation lever; and a bucket inserted into the upper tube so as to move forward and backward, one end exiting from one end of the upper tube and coupled to the upper side of the reverse propelling bucket, and the other end coming out of the other end of the upper tube and coupled to the bucket operation lever. working rod;

In an embodiment of the present invention, the bracket unit includes a mounting plate coupled to the rear of the ship; a support plate coupled to the lower rear surface of the mounting plate, the support plate supporting the propulsion unit; and a reinforcing plate coupled to connect the mounting plate and the support plate.

In an embodiment of the present invention, two or more of the propulsion units are provided and installed side by side on the support plate.

According to the present invention, the reverse thrust bucket can be minimized by rotating the reverse thrust bucket left and right together with the steering nozzle, thereby facilitating the operation of the reverse thrust bucket, and the effect of minimizing the resistance due to the reverse thrust bucket during propulsion of the ship. have.

In addition, according to the present invention, it is sufficient if the size of the reverse propelling bucket is sufficient to block the first discharge port by having a structure in which the ship is propelled backward by discharging water to the second discharge port of the steering nozzle, and thus the size of the reverse thrust bucket has the effect of further reducing

In addition, according to the present invention, the propulsion device can be easily mounted on the ship by coupling the bracket unit to the ship, and there is an effect that can minimize the structural change of the ship for mounting the propulsion device and the decrease in strength of the ship due to this. .

1 is a side view of a water jet propulsion apparatus for a ship according to an embodiment of the present invention;
Figure 2 is a side cross-sectional view of a water jet propulsion device for a ship according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view showing a state in which the reverse propulsion bucket is rotated downward in Figure 2;
4 is a plan view of a water jet propulsion apparatus for a ship according to an embodiment of the present invention.
5 is a plan view illustrating a state in which the steering nozzle is rotated to the left in FIG. 4 ;
6 is a plan view illustrating a state in which the steering nozzle is rotated to the right in FIG. 4 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, components shown in the drawings may be exaggerated, omitted, or schematically represented.

1 is a side view of a water jet propulsion device for a ship according to an embodiment of the present invention, FIG. 2 is a side sectional view of a water jet propulsion device for a ship according to an embodiment of the present invention, and FIG. It is a side cross-sectional view showing a rotated state, FIG. 4 is a plan view of a water jet propulsion apparatus for a ship according to an embodiment of the present invention, and FIG. 5 is a plan view showing a state in which the steering nozzle is rotated to the left in FIG. 6 is a plan view illustrating a state in which the steering nozzle is rotated to the right in FIG. 4 .

1 to 6 , the water jet propulsion apparatus for a ship according to an embodiment of the present invention largely includes a propulsion unit 100 and a bracket unit 200 .

The propulsion unit 100 is for propelling a ship in a water jet propulsion method, and includes an intake port 111 and a duct 110 having a drain port 112 connected to the intake port 111; an impeller 120 installed inside the duct 110; a steering nozzle 130 installed rotatably left and right on the drain 112 side of the duct 110; a nozzle operation unit 140 connected to the steering nozzle 130 and configured to rotate the steering nozzle 130 left and right; a reverse propulsion bucket 150 installed on the steering nozzle 130 to be rotatable up and down, disposed above the steering nozzle 130 when rotating upward, and disposed behind the steering nozzle 130 when rotating downward; and a bucket operation unit 160 connected to the reverse thrust bucket 150 to rotate the reverse thrust bucket 150 up and down.

The duct 110 is fixed to the upper surface of the support plate 220 of the bracket unit 200 to be described later. The water intake port 111 is formed below the front of the duct 110 , and is opened downward to penetrate the support plate 220 . The drain hole 112 is formed to open rearward of the duct 110 .

The impeller 120 is rotatably installed inside the duct 110 as shown in FIGS. 2 and 3 . The rotation shaft 121 of the impeller 120 extends forward through the duct 110 and is connected to the engine of the ship. At this time, a pipe-shaped cover 170 surrounding the rotation shaft 121 protruding through the duct 110 is formed on the outside of the duct 110 . The cover 170 may extend toward the vessel through the mounting plate 210 of the bracket unit 200 to be described later.

As shown in FIGS. 4 to 6 , the steering nozzle 130 is rotatably installed at the rear end of the duct 110 to control the direction of water discharged through the drain hole 112 to the left and right. . As shown in FIG. 2, the steering nozzle 130 penetrates the upper and lower surfaces of the duct 110, respectively, and is fastened to the rear end of the duct 110 by two nozzle coupling bolts B1 and B2. It can be rotatably coupled to the left and right at the rear end.

As shown in FIGS. 2 and 3 , the steering nozzle 130 includes a first discharge port 131 that is opened toward the rear, and a second discharge port 132 that is inclined toward the lower front.

As shown in FIG. 2 , the first discharge port 131 is formed so that water discharged through the drain port 112 can be discharged backward in a state in which the reverse thrust bucket 150 is rotated upward.

As shown in FIG. 3 , the second discharge port 132 is water discharged through the drain port 112 in a state in which the reverse propelling bucket 150 is rotated downward and the first discharge port 131 is closed. It is formed so that it can be discharged to the lower front side. In order to form the second discharge port 132 , a branch 133 protruding toward the lower front is formed at the lower portion of the steering nozzle 130 .

As shown in FIG. 4 , a side coupling part 134 for coupling with the nozzle operating part 140 is formed to protrude from one side of the steering nozzle 130 . One end of the nozzle operation rod 144 to be described later is rotatably coupled to the side coupling portion 134 .

The nozzle operation unit 140 is connected to the steering nozzle 130 as shown in FIGS. 4 to 6 , and includes a nozzle operation lever 141 installed in a ship; a side bracket 142 coupled to one side of the duct 110; a side tube 143 having one end coupled to the side bracket 142 and the other end extending toward the nozzle operation lever 141; And as being inserted into the side tube 143 to be movable forward and backward, one end exits from one end of the side tube 143 and is coupled to one side of the steering nozzle 130 , and the other end of the side tube 143 . and a nozzle actuating rod 144 that exits from the other end and is coupled to the nozzle actuating lever 141.

The nozzle operation lever 141 is rotatably installed on the lever casing 180 mounted on the ship.

One end of the side tube 143 is fixed to the side bracket 142 , and the other end is fixed to the lever casing 180 .

As the nozzle operation rod 144 has one end coupled to the side coupling portion 134 of the steering nozzle 130 and the other end coupled to the nozzle operation lever 141, the operation of the nozzle operation lever 141 is affected. By the side tube 143 is moved forward and backward.

As a result, as shown in FIGS. 5 and 6 , the nozzle operation unit 140 moves the nozzle operation rod 144 forward and backward using the nozzle operation lever 141, thereby operating the nozzle. The steering nozzle 130 connected to the rod 144 is rotated left and right around the two nozzle coupling bolts B1 and B2.

As shown in FIG. 4 , the reverse propelling bucket 150 penetrates through both sides of the steering nozzle 130 and is vertically attached to the steering nozzle 130 by two bucket coupling bolts B3 and B4 fastened to the steering nozzle 130 . rotatably coupled.

As shown in FIG. 2 , the reverse thrust bucket 150 is disposed above the steering nozzle 130 in an upwardly rotated state to open the first discharge port 131 . At this time, the water discharged from the duct 110 is discharged to the rear through the first discharge port 131, and the ship moves forward by the repulsive force generated at this time.

In addition, as shown in FIG. 3 , the reverse thrust bucket 150 is disposed behind the steering nozzle 130 in a downwardly rotated state to close the first discharge port 131 . At this time, the second discharge port 132 is maintained in an open state, so the water discharged from the duct 110 is discharged to the lower front through the second discharge port 132, and at this time, the vessel by the repulsive force generated will go backwards

An upper coupling part 151 for coupling with the bucket operation part 160 is formed to protrude from the upper portion of the reverse propelling bucket 150 . One end of the bucket operation rod 164 to be described later is rotatably coupled to the upper coupling portion 151 .

The bucket operation unit 160 is connected to the reverse propelling bucket 150 as shown in FIGS. 1 to 3 , and includes: a bucket operation lever 161 installed on a ship; an upper bracket 162 coupled to the upper side of the duct 110; an upper tube 163 having one end coupled to the upper bracket 162 and the other end extending toward the bucket operation lever 161; And as being inserted into the upper tube 163 to be movable forward and backward, one end exits from one end of the upper tube 163 and is coupled to the upper side of the reverse propulsion bucket 150 , and the other end of the upper tube 163 . and a bucket operation rod 164 exiting from the other end and coupled to the bucket operation lever 161 .

The bucket operation lever 161 is rotatably installed in the lever casing 180 mounted on the ship.

On the other hand, in the embodiment of the present invention, the bucket operation lever 161 and the nozzle operation lever 141 are expressed as being installed in separate lever casings 180, respectively, but the bucket operation lever 161 and the nozzle operation lever ( 141 may be installed together in one lever casing 180 .

One end of the upper tube 163 is fixed to the upper bracket 162 , and the other end is fixed to the lever casing 180 .

As the bucket operation rod 164 has one end coupled to the upper coupling portion 151 of the reverse propelling bucket 150 and the other end coupled to the bucket operation lever 161, the operation of the bucket operation lever 161 is The forward and backward operation is performed along the upper tube 163 by the

As a result, as shown in FIGS. 2 and 3 , the bucket operation unit 160 moves the bucket operation rod 164 forward and backward using the bucket operation lever 161, thereby operating the bucket. The reverse propulsion bucket 150 connected to the rod 164 is rotated up and down around the two bucket coupling bolts B3 and B4.

The bracket unit 200 is for mounting the propulsion unit 100 to a ship, and includes a mounting plate 210 coupled to the rear of the ship; a support plate 220 coupled to the lower rear surface of the mounting plate 210 to support the propulsion unit 100; and a reinforcing plate 230 coupled to connect the mounting plate 210 and the support plate 220 to each other.

The mounting plate 210 may be made of a metal plate having a shape corresponding to the shape of the rear surface of the ship. The mounting plate 210 may be coupled to the rear of the ship by a plurality of bolts and nuts.

The support plate 220 may be formed of a metal plate like the mounting plate 210 . The support plate 220 may be formed to be flat, and the center may be bent according to the lower shape of the ship to form a gentle 'V' shape.

The reinforcing plate 230 is made of a metal plate, and is installed at a corner between the mounting plate 210 and the support plate 220 . The reinforcing plate 230 is preferably provided at two or more locations along the left and right longitudinal directions of the mounting plate 210 and the support plate 220 .

The mounting plate 210 , the support plate 220 , and the reinforcing plate 230 may be coupled to each other by welding.

According to the waterjet propulsion apparatus for ships of the present invention configured as described above, the reverse thrust bucket 150 is rotated left and right together with the steering nozzle 130 to minimize the reverse thrust bucket 150, and accordingly, the reverse thrust bucket 150 The operation of 150 is easy, and resistance due to the reverse propulsion bucket 150 can be minimized during propulsion of the vessel.

In addition, according to the present invention, the size of the reverse propulsion bucket 150 by having a structure in which the ship is propelled backward by discharging water to the second discharge port 132 of the steering nozzle 130 increases the size of the first discharge port 131. It is sufficient as long as it can block, and thus the size of the reverse thrust bucket 150 can be further reduced.

In addition, according to the present invention, the water jet propulsion device can be easily mounted on the ship by coupling the bracket unit 200 to the ship, and the structure change of the ship for mounting the water jet propulsion device and the strength of the ship thereby degradation can be minimized.

On the other hand, as shown in Figures 4 to 6, in the embodiment of the present invention, the pushing unit 100 is provided with two or more may be installed side by side on the support plate (220).

That is, the water jet propulsion device of the present invention can be manufactured by changing the number of the propulsion units 100 mounted on the support plate 220 according to the propulsion force required for the ship. According to this, by changing only the number mounted on the support plate 220 without changing the design of the propulsion unit 100 itself, it is possible to easily change the performance of the propulsion device according to the specifications required for the ship.

In the foregoing, the present invention has been described with reference to limited embodiments and drawings, but it will be apparent to those skilled in the art that various modifications are possible within the scope of the technical idea of the present invention. Therefore, the protection scope of the present invention should be defined by the description of the claims and their equivalents.

100: propulsion unit 110: duct
111: intake port 112: drain port
120: impeller 121: rotation shaft
130: steering nozzle 131: first outlet
132: second discharge port 133: branch
134: side coupling part 140: nozzle operation part
141: nozzle operation lever 142: side bracket
143: side tube 144: nozzle actuation rod
150: reverse propulsion bucket 151: upper coupling part
160: bucket operation unit 161: bucket operation lever
162: upper bracket 163: upper tube
164: bucket operation rod 170: cover
180: lever casing 200: bracket unit
210: mounting plate 220: support plate
230: reinforcement plate

Claims (6)

Water jet type propulsion unit 100; and
A bracket unit 200 for mounting the propulsion unit 100 to a ship; including,
The propulsion unit 100,
a duct 110 having an intake port 111 and a drain port 112 connected to the intake port 111;
an impeller 120 installed inside the duct 110;
a steering nozzle 130 installed rotatably left and right on the drain 112 side of the duct 110;
a nozzle operation unit 140 connected to the steering nozzle 130 and configured to rotate the steering nozzle 130 left and right;
a reverse propelling bucket 150 installed on the steering nozzle 130 to be rotatable up and down, disposed above the steering nozzle 130 when rotating upward, and disposed behind the steering nozzle 130 when rotating downward; and
As connected to the reverse thrust bucket 150, the bucket operation unit 160 for rotating the reverse thrust bucket 150 up and down; includes;
The reverse propelling bucket 150 rotates left and right together with the steering nozzle 130 as it is coupled to the steering nozzle 130 ,
The steering nozzle 130 includes a first discharge port 131 that is opened toward the rear and a second discharge port 132 that is opened obliquely toward the lower front, and the first discharge port 131 is the It is closed when the reverse propelling bucket 150 is rotated downward, and the second discharge port 132 is maintained in an open state when the reverse thrust bucket 150 is rotated downwardly,
The nozzle operation unit 140,
Nozzle operating lever 141 installed on the ship;
a side bracket 142 coupled to one side of the duct 110;
a side tube 143 having one end coupled to the side bracket 142 and the other end extending toward the nozzle operation lever 141; and
As being inserted into the side tube 143 in a forward and backward motion, one end exits from one end of the side tube 143 and is coupled to one side of the steering nozzle 130 , and the other end is the other end of the side tube 143 . Including;
The bucket operation unit 160,
Bucket operating lever 161 installed on the ship;
an upper bracket 162 coupled to the upper side of the duct 110;
an upper tube 163 having one end coupled to the upper bracket 162 and the other end extending toward the bucket operation lever 161; and
As being inserted into the upper tube 163 to be movable forward and backward, one end exits from one end of the upper tube 163 and is coupled to the upper side of the reverse propulsion bucket 150 , and the other end is the other end of the upper tube 163 . and a bucket operation rod 164 which exits from and is coupled to the bucket operation lever 161.
The bracket unit 200,
a mounting plate 210 made of a metal plate having a shape corresponding to the shape of the back of the ship and coupled to the back of the ship by a plurality of bolts and nuts;
As being coupled to the lower rear of the mounting plate 210, the support plate 220 for supporting the pushing unit 100; and
Reinforcing plate 230 coupled to connect the mounting plate 210 and the support plate 220;
The propulsion unit 100 is a water jet propulsion device for a ship, characterized in that two or more are provided and installed side by side on the support plate (220).
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