KR20220087296A - Propulsion System and Ship having the same - Google Patents

Abstract

The present invention relates to a propulsion system and a ship having the same. The propulsion system of the present invention is a propulsion system that converts power generated from a power source into rotational force in a shaft system to generate propulsive force while rotating a propeller, wherein the propeller is It consists of a plurality of blades installed on the hub symmetrically or asymmetrically with a gap, and the plurality of blades are spaced apart from each other in the axial direction by different manufacturing reference lines.

Description

A propulsion system and a ship having the same {Propulsion System and Ship having the same}

The present invention relates to a propulsion system and a ship having the same.

In general, a ship sails with propulsion by a propulsion system. The propulsion system includes a power source for generating power, a shaft system that rotates by receiving power from the power source, and a propeller that rotates by receiving the rotational force of the shaft system.

In the above, the propeller is a spiral propeller (screw propeller), a water jet propeller (jet propeller), a paddle wheel vehicle, Boyd Schneider propeller, and the like. Among them, the spiral propeller is the most used because its propulsion efficiency is relatively higher than that of other types of propulsion systems, its structure is relatively simple, and its manufacturing cost is relatively low.

Spiral propellers can also be classified by performance. A fixed pitch propeller (FPP) in which a plurality of blades are fixed to a hub connected to a rotation shaft, and a plurality of blades can move in a hub connected to a rotation shaft to adjust the pitch angle Controllable pitch propeller (CPP), two helical propellers rotating in opposite directions on the same axis are arranged so that the rotational energy flowing out from the forward propeller is recovered by the after propeller There is a contra-rotating propeller (CRP), etc., which increases efficiency by doing so.

In the case of propellers used in ships, each wing has the same geometric shape and is located on the same generating line.

Such a propeller is a device that rotates and generates the thrust required for a ship, and generally has an energy loss of about 30%, and it is quite difficult to improve the performance of the propeller itself despite this energy loss. Accordingly, efficiency and vigor are improved by adjusting the distribution of skew and rake of the wing, but it is insufficient to compensate for the energy loss. However, there is a problem in that the cost and man-hours required for adding an energy saving device are additional.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to reduce the energy loss of the wings disposed in the front by configuring the propeller so that the production reference lines of a plurality of blades are spaced apart in the axial direction. An object of the present invention is to provide a propulsion system capable of maximizing the propulsion performance of a ship by recovering it from a wing disposed at the rear and a ship having the same.

In addition, an object of the present invention is to disperse the vibratory force acting on the ship by arranging the production reference lines of the blades apart in the axial direction, and to further secure the distance between the blades to reduce the interference effect, and a propulsion system having the same to provide ships.

A propulsion system according to an aspect of the present invention is a propulsion system that converts power generated from a power source into rotational force in a shaft system to generate propulsive force while rotating a propeller, wherein the propeller is installed on a hub symmetrically or asymmetrically with a certain interval It consists of a plurality of blades that become, and the plurality of blades may be spaced apart from each other in the axial direction by different production reference lines.

Specifically, when the plurality of wings are symmetrically disposed, the opposite wings may be disposed on the same manufacturing reference line.

Specifically, as for the plurality of wings, a pair of opposing wings is installed on a first production reference line, and another pair of opposite wings is installed on a second production reference line, and the opposing pair of the wings are, The other pair of wings disposed in front by the first production reference line and facing each other may be disposed rearward by a predetermined distance from the pair of blades facing by the second production reference line.

Specifically, when the plurality of wings are asymmetrically disposed, each of the wings may be disposed on different manufacturing reference lines.

Specifically, as for the plurality of wings, any one wing is installed on the first production baseline, the other wing adjacent to the one wing is installed on the second production baseline, and the other wing is adjacent to the other wing Another one of the wings is installed on the third production reference line, the one blade is disposed in front by the first production reference line, and the other blade is any of the above by the second production reference line. It is arranged at a predetermined interval rearward than one wing, and the other wing may be arranged at a predetermined interval rearward than the other wing by the third production reference line.

Specifically, the plurality of wings may have different or the same geometric shapes of the wings disposed at the rear and the wings disposed at the front.

Specifically, the plurality of wings may have a smaller diameter than a wing disposed at the rear, or may have the same diameter as the wing disposed at the rear and the wing disposed at the front.

Specifically, the plurality of wings may have a smaller area than a wing disposed at the rear, or may have the same area as the wing disposed at the rear and the wing disposed at the front.

Specifically, the plurality of wings may have a pitch angle greater than that of a wing disposed at the rear, or a pitch angle of the wing disposed at the rear and the wing disposed at the front may be the same.

Specifically, in the plurality of wings, the skew and rake of the wings disposed in the rear are greater than the wings disposed in the front, or the skew and the rake of the wings disposed in the rear and the wings disposed in the front may be the same. .

Specifically, the propeller may be a fixed pitch propeller or a variable pitch propeller.

A ship according to another aspect of the present invention is characterized in that it comprises the propulsion system described above.

The propulsion system provided in the ship according to the present invention, by configuring the propeller so that a plurality of blades are arranged to be spaced apart in the axial direction by different production reference lines, the wings arranged at the rear recover the energy lost of the wings arranged in the front. It is possible to reduce the interference effect by additionally securing the distance between the front and rear blades, thereby maximizing the propulsion performance of the vessel compared to the existing propeller in which a plurality of blades are equally positioned on the production reference line.

In addition, the propulsion system provided in the ship according to the present invention configures the propeller so that a plurality of wings are arranged to be spaced apart in the axial direction by different production reference lines, thereby dispersing the vibrational force through the separation of the wings disposed in the front and rear and propeller propulsion By improving the performance, it is possible to reduce the size compared to the existing propeller under the same propulsion performance as the existing propeller, as well as reduce the cost.

In addition, the propulsion system provided in the ship according to the present invention, by making the diameter and area of the wing disposed at the rear of the plurality of wings smaller than the wing disposed at the front, the overall weight can be reduced, and the vibratory force acting on the hull And it is possible to improve structural stability through vibration reduction, as well as to reduce the cost.

In addition, the propulsion system provided in the ship according to the present invention can reduce the overall size and weight of the propeller under the same propulsion performance as that of the existing propeller, so it is possible to reduce the size of the shaft system associated with the propeller and/or the capacity of the power source can

1 is a side view of a ship to which a propulsion system according to an embodiment of the present invention is applied.
FIG. 2 is a view for explaining the propeller in FIG. 1 .
3 is a view for explaining another embodiment of the propeller in FIG. 1 .

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a ship to which a propulsion system according to an embodiment of the present invention is applied, FIG. 2 is a view for explaining the propeller in FIG. 1, and FIG. 3 is a view for explaining another embodiment of the propeller in FIG. to be.

As shown in FIG. 1 , the propulsion system 100 according to an embodiment of the present invention may be installed in the engine room 20 inside the hull 10 to provide propulsion force to the ship 1 , and a power source 110 , the shaft system 120 , and a propeller 130 may be included.

The power source 110 may generate power, and may be an engine, a motor, a turbine, or the like. The power source 110 may transmit the generated power to the shaft system 120 .

The shaft system 120 is installed between the power source 110 and the propeller 130 to rotate the propeller 130 with power transmitted from the power source 110 . The shaft system 120 may include a crankshaft and a propeller shaft, and in the case of a ship 1 to which a long shaft is applied, may include an intermediate shaft connecting the crankshaft and the propeller shaft.

The propeller 130 is connected to the shaft system 120 exposed to the outside through the stern boss, receives power generated from the power source 110 through the shaft system 120 and rotates to provide propulsion to the ship 1 . have.

Among the power source 110, the shaft system 120, and the propeller 130 constituting the propulsion system 100 described above, the propeller 130 is an important component in the propulsion performance of the ship 1, and the power source 110 and the shaft system The capacity and size of 120 may vary according to the specifications of the propeller 130 .

As such, the propeller 130 is an important configuration for the propulsion performance of the ship 1, and it is known that a typical propeller has an energy loss of about 30%, and in spite of this energy loss, the performance of the propeller itself is improved. It is quite difficult to do so, and in the past, an energy saving device for improving efficiency and vibratory force by controlling the distribution of skew, rake, etc. of the wing, or recovering energy lost in the propeller is added to the propulsion system 100 It is currently being installed.

Accordingly, the present embodiment provides a propeller 130 capable of recovering the lost energy of the existing propeller by itself without additionally configuring an additional device such as an energy saving device in the propulsion system 100, and in FIGS. 2 and below. 3 will be described in detail.

The propeller 130 may include a plurality of blades 132 installed on the hub 131 .

The propeller 130 is a fixed pitch propeller (FPP) or a plurality of blades 132 fixed to a hub 131 in which a plurality of blades 132 are connected to the shaft system 120 or connected to the shaft system 120 . It may be a controllable pitch propeller (CPP) that can move in the hub 131 to adjust the angle of the pitch, but the type is not limited thereto.

The propeller 130, as shown in FIG. 2, is made of a plurality of blades 132 installed on the hub 131 symmetrically with a predetermined interval, or, as shown in FIG. 3, has a predetermined interval and is asymmetrical As a result, it may be formed of a plurality of wings 132 installed on the hub 131 .

That is, the plurality of blades 132 constituting the propeller 130 are arranged with an even number of symmetrically spaced apart as shown in FIG. 2, or an odd number of asymmetrically spaced apart as shown in FIG. can be

The plurality of wings 132 may be spaced apart from each other in the axial direction by different manufacturing reference lines GL, which will be described in detail below.

As shown in FIG. 2 , when four of the plurality of wings 132 are symmetrically disposed, the opposite wings may be disposed on the same manufacturing reference line GL1 or GL2 . At this time, a pair of facing wings 132 among the plurality of wings 132 may be installed on the first manufacturing reference line GL1, and the other pair of facing wings 132 among the plurality of wings 132 is It may be installed on the second manufacturing reference line GL2 .

In the above, when the first manufacturing reference line GL1 is defined as the manufacturing reference line during the production of the existing propeller, the second manufacturing reference line GL2 may be a manufacturing reference line spaced apart from the first manufacturing reference line GL1 by a predetermined interval. have.

That is, a pair of facing wings 132 among the plurality of wings 132 may be disposed in front by the first manufacturing reference line GL1, and the other pair of facing wings among the plurality of wings 132 ( The 132 may be disposed rearward by a predetermined distance from the pair of wings 132 facing each other by the second manufacturing reference line GL2 .

As shown in FIG. 3 , the plurality of blades 132 may be disposed on different manufacturing reference lines GL1 , GL2 or GL3 when three are asymmetrically disposed. At this time, any one of the wings 132 of the plurality of wings 132 may be installed on the first manufacturing reference line GL1, the other one of the plurality of wings 132 adjacent to any one of the wings 132 The wing 132 may be installed on the second manufacturing reference line GL2 , and another wing 132 adjacent to the other wing 132 among the plurality of wings 132 is a third manufacturing reference line GL3 . ) can be installed.

In the above, when the first manufacturing reference line GL1 is defined as the manufacturing reference line during the production of the existing propeller, the second manufacturing reference line GL2 may be a manufacturing reference line spaced apart from the first manufacturing reference line GL1 by a predetermined interval. In addition, the third manufacturing reference line GL3 may be a manufacturing reference line spaced apart from the second manufacturing reference line GL2 by a predetermined interval rearward.

That is, one wing 132 of the plurality of wings 132 may be disposed in front by the first manufacturing reference line GL1 , and the other wing 132 among the plurality of wings 132 is the second It may be arranged at a predetermined interval rearward than any one of the wing 132 by the manufacturing reference line GL2, and another wing 132 among the plurality of wings 132 is different by the third manufacturing reference line GL3. One wing 132 may be disposed rearward at a predetermined interval.

In this embodiment, by configuring the propeller 130 so that a plurality of wings 132 are spaced apart in the axial direction by different production reference lines (GL), the wings 132 disposed at the rear are disposed in the front. It is possible to recover the energy lost of the blades 132, and to further secure the distance between the front and rear blades 132 to reduce the interference effect, so that a plurality of blades 132 are identically positioned on the manufacturing reference line, compared to the existing propeller ship The propulsion performance of (1) can be maximized, and the size compared to the existing propeller under the same propulsion performance as the existing propeller can be achieved by dispersing the vibrational force through the separation of the wings 132 disposed at the front and rear and improving the propulsion performance of the propeller 130. Not only can it be reduced, but also the cost can be reduced.

As described above, among the plurality of wings 132 arranged symmetrically or asymmetrically, the wing 132 arranged at the rear and the wing 132 arranged at the front are spaced apart in the axial direction by different manufacturing reference lines GL. can be At this time, as shown in FIGS. 2 and 3 , the wing 132 disposed at the rear and the wing 132 disposed at the front may have different geometric shapes. Although not shown in the drawings, of course, the wing 132 disposed at the rear and the wing 132 disposed at the front of the plurality of wings 132 of this embodiment may have the same geometric shape.

Specifically, the wing 132 disposed at the rear of the plurality of wings 132 may have a smaller diameter than the wing 132 disposed at the front. Of course, the wing 132 disposed at the rear and the wing 132 disposed at the front may have the same diameter.

In addition, the wing 132 disposed at the rear among the plurality of wings 132 may have a smaller area than the wing 132 disposed at the front. Of course, the wing 132 disposed at the rear and the wing 132 disposed at the front may have the same area.

Through this, the present embodiment makes it possible to reduce the overall weight by making the diameter and/or area of the wing 132 disposed at the rear among the plurality of wings 132 smaller than the wing 132 disposed at the front, so that the hull ( 10), it is possible to improve structural stability through reduction of vibratory force and vibration, as well as reduce cost.

In addition, the wing 132 disposed at the rear of the plurality of wings 132 spaced apart in the axial direction by different production reference lines GL has a pitch angle than that of the wing 132 disposed in the front. can be large Of course, the wing 132 disposed at the rear and the wing 132 disposed at the front of the plurality of wings 132 may have the same pitch angle.

In addition, the wing 132 disposed at the rear of the plurality of wings 132 may have greater skew and rake than the wing 132 disposed at the front. Of course, the wing 132 disposed in the rear and the wing 132 disposed in the front of the plurality of wings 132 may have the same skew and rake.

As described above, in the propeller 130 of this embodiment, a plurality of blades 132 are spaced apart in the axial direction by different production reference lines GL, and the blades 132 disposed at the rear of the plurality of blades 132 . ) smaller than the diameter and / or area of the wing 132 disposed in the front, or in addition to this, the wing 132 disposed in the rear of the plurality of wings 132 is disposed in front of the wing 132 and the pitch angle and / or by increasing the skew and rake, the upper flow rate of the propeller 130 is improved compared to the existing propeller positioned on the same manufacturing reference line, thereby reducing the resistance through flow improvement, as well as the rear flow rate of the propeller 130 increased to improve the propulsion performance due to the increase in thrust of the propeller 130 .

In the above, the present invention has been described focusing on the embodiments of the present invention, but this is only an example and does not limit the present invention. It will be appreciated that various combinations or modifications and applications not illustrated in the embodiments are possible within the scope. Accordingly, descriptions related to modifications and applications that can be easily derived from the embodiments of the present invention should be interpreted as being included in the present invention.

1: ship 10: hull
20: engine room 100: propulsion system
110: power source 120: shaft system
130: propeller 131: hub
132: wing GL: crafting baseline
GL1: first build baseline GL2: second build baseline
GL3: Third Build Baseline

Claims (12)

A propulsion system that converts power generated from a power source into rotational force in a shaft system to generate propulsive force as the propeller rotates,
The propeller is
It consists of a number of blades installed on the hub symmetrically or asymmetrically with a certain interval,
The plurality of wings,
A propulsion system spaced apart in the axial direction by different production baselines. According to claim 1, wherein the plurality of wings,
A propulsion system in which, when placed symmetrically, opposing blades are placed on the same build baseline. According to claim 2, wherein the plurality of wings,
A pair of opposing wings is installed on a first build baseline, and another pair of opposing wings is installed on a second build baseline,
The pair of opposing wings are disposed in front by the first production reference line,
The other pair of blades facing each other is a propulsion system that is disposed rearward by a predetermined distance from the pair of blades facing each other by the second production reference line. According to claim 1, wherein the plurality of wings,
A propulsion system in which each wing is placed at a different build baseline when placed asymmetrically. According to claim 4, The plurality of wings,
Any one wing is installed on the first production baseline, the other wing adjacent to the one wing is installed on the second production baseline, and another wing adjacent to the other wing is installed on the third installed on the production baseline,
Any one of the wings is disposed in front by the first production reference line,
The other wing is arranged at a predetermined interval rearward than the one of the wing by the second production reference line,
The other one wing is a propulsion system that is disposed rearward by a predetermined distance from the other wing by the third production reference line. According to claim 1, wherein the plurality of wings,
A propulsion system with a different or identical geometry of the wing positioned at the rear and the wing positioned at the front. According to claim 1, wherein the plurality of wings,
A propulsion system in which the wing disposed at the rear has a smaller diameter than the wing disposed at the front, or the wing disposed at the rear has the same diameter as the wing disposed at the front. According to claim 1, wherein the plurality of wings,
The wing disposed at the rear has a smaller area than the wing disposed at the front, or the area of the wing disposed at the rear and the wing disposed at the front is the same. According to claim 1, wherein the plurality of wings,
A propulsion system in which the pitch angle of the wing disposed in the rear is greater than that of the wing disposed in the front, or the pitch angle of the wing disposed in the front and the wing disposed in the rear is the same. According to claim 1, wherein the plurality of wings,
The wing disposed at the rear has a greater skew and rake than the wing disposed at the front, or the wing disposed at the rear and the wing disposed at the front have the same skew and rake. According to claim 1, wherein the propeller,
A propulsion system that is either a fixed pitch propeller or a variable pitch propeller. A ship, characterized in that it is provided with the propulsion system according to any one of claims 1 to 11.

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