KR20120004133U - Shape of Steering Bucket for Water-Jet Propulsion System - Google Patents

Abstract

The present invention relates to the shape of the steering bucket of the water jet propulsion apparatus, and more specifically, the present invention is to optimize the shape of the steering bucket to perform the steering function of the water jet propulsion device to the water on the inner side of the steering bucket during steering of the ship The present invention relates to a technique for improving the linear performance of a high speed vessel equipped with a water spray propulsion apparatus by increasing the effective receiving area in contact with the steering bucket. The steering bucket according to the present invention has the shape of a rectangular duct and has a proportional relationship of width B to b × D, height H to h × D, and length L to l × D based on the nozzle inner diameter D of the water jet propulsion device. In this case, b is 1.0 to 1.2, h is 1.0 to 1.2, and l is characterized by having a numerical range of 2.5 to 2.8. According to the present invention, the steering force is increased by the steering of the steering wheel at a slight angle, and thus it is possible to improve the passage safety of the ship at the high speed.

Description

Steering bucket shape of water spray propulsion system {Shape of Steering Bucket for Water-Jet Propulsion System}

The present invention relates to the shape of the steering bucket of the water jet propulsion system (Water-Jet Propulsion System), more specifically, the present invention is to optimize the shape of the steering bucket to perform the steering function of the water jet propulsion system steering of the ship The present invention relates to a technique for improving the linear performance of a high speed vessel equipped with a water spray propulsion apparatus by increasing the steering force of the steering bucket by increasing the effective receiving area where water contacts the inner side of the steering bucket.

Screw propeller, which is generally used as ship propeller, is the next generation propulsion device to solve this problem because the thrust decreases due to excessive cavitation on the wing surface during high speed operation and the hull vibration and the water noise increase. The Water-Jet Propulsion System has emerged.

This water jet propulsion device operates the pump connected to the engine to draw water from the inlet located on the bottom of the ship and then pushes the ship forward while spraying the accelerated water through the nozzle through the guide pipe installed inside the ship. Thrust).

Attached Figure 1 shows the overall configuration of the general water jet propulsion device, Figure 2 shows the configuration of the reverse and the forward and backward of the steering bucket mounted.

The water jet propulsion device is largely composed of an impeller 4, a main shaft 5, an induction pipe 6, a nozzle 3, a steering bucket 2, and a reverser 1 (FIG. 1).

Here, the impeller (4) is a rotating body having a wing for giving energy in the direction of the ship to the water, the main shaft (5) is a shaft for transmitting power to the impeller (4), the induction pipe (6) water sucked in the suction port To the inlet of the impeller (4), the nozzle (3) to eject the thrust water by the impeller (4), the steering bucket (2) turns the direction of the water ejected from the nozzle (3) to the left and right The steering apparatus and the reverser 1 which adjust the traveling direction of a ship by making it reverse | reverse the direction of the ship's forward direction of the water blown out from the nozzle 3 refer to the apparatus which reverses a ship.

On the other hand, if the horsepower of the engine for transmitting power is approximately 5000 horsepower or more horsepower, the steering bucket (2) of the water spray propulsion device is generally used a steering bucket (2) of the rectangular duct type, the steering of the square shape The bucket 2 is equipped with a reverser 1 for generating reverse thrust of the water jet propeller (FIG. 2).

In the case of the reverser (1) mounted on the steering bucket (2) of the rectangular duct in the water spray propulsion device, the value of the thrust generated when reversing varies depending on the structure, but engineering problems do not generally occur. .

However, in relation to the steering force generation, the side wall of the steering bucket (2) in which the water spray momentum discharged from the nozzle (3) is deflected due to steering unless the steering bucket (2) in the form of a square duct is designed for the nozzle (3). There is a problem in that it does not provide sufficient steering force.

And if the steering force is not enough, it takes a lot of time to reach the intended course of the ship, so the ship's captain is in the direction to increase the steering force of the water spray propulsion system by using the steering angle excessively than necessary. In this case, due to the sharp increase in steering force, the ship excessively swings to the left and right, causing the ship to deviate from its intended course of overshoot, and the captain again turns the steering in the opposite direction. As a result, the ship often operates in a zigzag by acting to return the ship to the intended course, which is a serious situation because the phenomenon occurs more excessively when the ship's speed is high.

The present invention has been proposed to solve the above problems, by providing a shape of the steering bucket (2) of the square duct shape optimized for the nozzle (3) of the water spray propulsion device regardless of the speed and steering angle of the vessel It aims to be able to generate sufficient steering force.

Other objects and advantages of the present invention will be described below, which is not limited to the matters disclosed in the claims of the present invention and the disclosures of the embodiments thereof, but also to the broader ranges by means and combinations within the range that can be easily contemplated therefrom. Add that it will be included.

The present invention to achieve the above object,

As to the steering bucket shape of the water spray propulsion device,

The steering bucket has a shape of a rectangular duct and has a proportional relationship of width B to b × D, height H to h × D, and length L to l × D based on the nozzle inner diameter D of the water jet propulsion device. Case b is 1.0 ~ 1.2, h is 1.0 ~ 1.2, l is presented a steering bucket shape of the water spray propulsion device, characterized in that having a numerical range of 2.5 ~ 2.8.

According to the present invention, the steering force is also increased by the steering of the steering wheel at a slight angle, and thus it is possible to improve the acupuncture safety of the ship at high speed.

Other effects of the present invention, as well as those described in the embodiments described above and the claims of the present invention, as well as potential effects that can occur within the range that can be easily contemplated therefrom and potential advantages that contribute to industrial development It will be added that it will be covered by a wider scope.

Figure 1 shows the overall configuration of a general water jet propulsion device.
Figure 2 shows the configuration during the forward and reverse of the reverse bucket equipped steering bucket.
Figure 3 shows the configuration of the width, height and length of the nozzle diameter of the steering bucket according to the present invention.
Figure 4 shows the difference in flow during steering of the steering bucket and the existing steering bucket according to the present invention.
Figure 5 is a graph showing the difference in steering performance of the steering bucket and steering angle according to the present invention by the steering angle.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, it will be described in the preferred embodiment of the present invention, but the technical idea of the present invention is not limited to this, but can be variously modified and implemented by those skilled in the art.

Figure 3 shows the configuration of the width, height and length of the nozzle diameter of the steering bucket according to the present invention.

As the steering bucket 2 of the water spray propulsion device driven by a high horsepower engine, a bucket of a rectangular duct type as shown in FIG. 3 is generally used. Ships equipped with water jet propulsion systems are mostly high speed vessels, and smooth steering of the ship under all conditions is a very important issue directly related to safety.However, when the ship is at high speed, the steering force is sometimes not enough to lead the ship The reality is that safety often fails.

The above problem occurs when the steering bucket 2 of a shape suitable for the nozzle 3 diameter D (7) of the water jet propulsion device is not designed.

The main design factors of the steering bucket 2 are the width B 8, the height H 9 and the length L 10 of the steering bucket 2 as shown in FIG. 3. When the width B (8), the height H (9) and the length L (10), which are the main design factors of the steering bucket (2), are not designed with the nozzle (3) diameter D (7) and the appropriate dimension ratio, As shown in Fig. 4, steering force of sufficient magnitude cannot be generated.

Generally speaking, the longer the length L (10) of the steering bucket 2 and the shorter the width B (8), the better the steering force, but in this case the capacity of the hydraulic system for steering increases. And a steering angle range of 30 ° each left and right that is normally required in the steering bucket 2 is reduced due to interference with the nozzle 3.

Therefore, the present invention fully considers these various matters, and increases the effective receiving area in which water comes into contact with the inner side of the steering bucket 2 during steering of a high-speed ship equipped with a water spray propulsion device, so that the steering force of the steering bucket 2 is increased. It is proposed that the shape of the optimized steering bucket (2) to improve the straight performance of the ship by increasing the bar, the steering bucket (2) according to the present invention has the shape of a square duct, The width B (8) is b × D (7), the height H (9) is h × D (7), and the length L (10) is l × D (7) based on the inside diameter D (7) of the nozzle (3). In this case, b is 1.0 to 1.2, h is 1.0 to 1.2, and l is 2.5 to 2.8.

Figure 4 shows the difference in flow during steering of the steering bucket and the existing steering bucket according to the present invention. Hereinafter, the steering force generation mechanism will be described for each of a, b, and c shown in FIG. 4.

4a is a case in which the length of the steering bucket 2 is not sufficient. In this case, the flow of water reflected on the side wall of the steering bucket 2 and the flow injected without interference are added to the vector sum. The steering bucket 2 has a short length so that the steering bucket 2 is able to control the inertial flow of the water spray. The steering bucket 2 is not sufficiently diverted to the steering angle of the length of the steering bucket 2, so that the steering force generated in the steering bucket 2 is insufficient.

4b is a case where the width of the steering bucket 2 is excessive. In this case, only a part of the sprayed water is reflected at the side end of the steering bucket (2) and the remaining water spray is sprayed without any interference of the steering bucket (2), which is a deviation between the steering angle of the steering bucket (2) and the angle of the water spray flow. Occurs, resulting in a lack of steering power. On the other hand, even when the height of the steering bucket (2) is excessive, the phenomenon that the steering force is reduced because of the phenomenon that the water sprayed from the nozzle is spread in the vertical direction similar to the case of the width.

4 c is the case of the steering bucket 2 according to the present invention. In this case, since the length, width and height of the steering bucket 2 have an optimum shape in proportion to the diameter of the nozzle 3, the flow is injected without interference with the flow of water reflected on the side wall of the steering bucket 2. This vector sum is added to the water spray in the direction coinciding with the steering angle to generate sufficient steering force.

Figure 5 is a graph showing the difference in steering performance of the steering bucket and steering angle according to the present invention by the steering angle.

Y in FIG. 5 corresponds to a and b in FIG. 4 when steering force is not sufficiently generated at an initial steering angle of the steering bucket 2. In addition, X in FIG. 5 corresponds to c in FIG. 4, and the width B (8) of the steering bucket 2 is 1.12 × D based on the inside diameter D (7) of the nozzle 3 according to the embodiment of the present invention. , The height H (9) is 1.16 × D, the length L has a proportion of 2.64 × D, it can be seen that the steering force is sufficiently generated at the initial steering angle of the steering bucket (2).

If the initial steering force is not sufficient, ships that fly at high speed will increase the steering angle excessively in order to secure a course, which causes a sharp increase in steering force, causing the ship to turn sharply and even overshoot the intended course of overshoot. ) Also occurs, there is a problem that the ship stability of the ship is greatly reduced. This problem is solved by presenting the optimum shape ratio of the nozzle 3 and the steering bucket 2.

It will be understood by those skilled in the art that various modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to describe, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

1: Reverse 6: Induction pipe
2: Steering Bucket 7: Inner Diameter D of Nozzle
3: Nozzle 8: Width of Steering Bucket B
4: Impeller 9: Height of steering bucket H
5: spindle 10: length of steering bucket L

Claims (1)

As to the steering bucket shape of the water spray propulsion device,
The steering bucket has a shape of a rectangular duct and has a proportional relationship of width B to b × D, height H to h × D, and length L to l × D based on the nozzle inner diameter D of the water jet propulsion device. Case b is 1.0 ~ 1.2, h is 1.0 ~ 1.2, l is 2.5 ~ 2.8, characterized in that the steering bucket shape of the water spray propulsion device.

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