KR20000066461A - A projection apparatus of the underwater moving object - Google Patents

Abstract

PURPOSE: A jet pump type propulsion is provided to increase propelling efficiency under the water and enable an underwater mover to balance by little radial noise and a torque balance. CONSTITUTION: A duct(30) surrounds each rotating piece of a rotating wing(10), having a fine interval between the end of the piece and the inside of the duct. The end of each fixing piece in a fixing wing(20) is fixed to the rear end of the duct. Thus, inlet flux from the rotating wing is adjusted by the inverse flux of an underwater mover to suppress cavitation. Therefore, radial noise from the rotating wing is remarkably reduced.

Description

A PROJECTION APPARATUS OF THE UNDERWATER MOVING OBJECT}

The present invention relates to a propulsion apparatus for advancing the underwater vehicle in water, and more particularly, the propulsion efficiency of the propulsion device installed at the rear end of the underwater vehicle requiring high speed and low noise is composed of elements corresponding to hydrodynamic characteristics. The present invention relates to a propulsion device for an underwater vehicle which is capable of improving, reducing noise and balancing torque.

In general, underwater vehicles are to be propelled at high speeds, such as torpedoes and submarines, which are underwater weapon systems, and must minimize noise due to the characteristics of self-defense and performance missions and require high propulsion efficiency.

Since the performance of such an underwater vehicle has a great influence on the target detection ability, the steering performance to track the detected target, and the driving performance, research on the propulsion device that meets the high speed / low noise characteristics has been made continuously.

In particular, unlike onshore and aircraft turbomachinery, the underwater vehicle propulsion device is located at the rear of the underwater vehicle, which is disturbed by the underwater vehicle, and very unstable and uneven flow flows into the propulsion device. Therefore, the design of the propulsion device of the underwater vehicle requires the shape design such as the optimum wing section and the wing angle based on the accurate analysis of the non-uniform return flow.

However, propeller screws for marine ships are generally used as a propulsion device of a conventional underwater vehicle, and inverted propellers that reduce torque while rotating in opposite directions in aquatic bodies where torque balance is more important, such as torpedoes, are used.

The general propeller used as the propulsion device of the submarine is to propel the hull by generating thrust in each wing section of the propeller. Since such a propeller rotates in only one direction, it generates unnecessary torque, and the speed is increased and the load is increased. The increase in the possibility of cavitation increases, the radiation noise and the self-noise increases, there is a disadvantage that the detectability of the underwater vehicle increases. In addition, the conventional inverted propeller applied to torpedoes has excellent propulsion efficiency and cavitation performance, and is advantageous for torque balance, but has a limit in reducing noise increase due to high speed. On the other hand, a special purpose ship such as a tugboat is a so-called duct propeller that surrounds the outside of the propeller, but this is to prevent the load from being applied to the tip of the propeller wing to maintain torque balance and to prevent vortex generation. As the length (hereinafter referred to as “code length”) becomes shorter towards the tip of the wing, the gap with the duct cannot be kept constant, so it only serves to protect the propeller and the gap flow between the duct and the propeller. There was a problem that does not minimize.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a propulsion device consisting of a rotor (Rotor) and a fixed wing (Stator) and a duct surrounding the water of the underwater moving object The present invention provides a pump jet propulsion device for an underwater vehicle in which the underwater vehicle can be balanced by improving propulsion efficiency in the water, reducing radiation noise, and torque balance.

1 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the first embodiment of the present invention,

Figure 2 is an enlarged longitudinal cross-sectional view showing the configuration of the propulsion device according to the first embodiment of the present invention,

Figure 3a is an enlarged rear view of the rotary blade according to the first embodiment of the present invention,

3B is a cross-sectional view along the line A-A,

Figure 4a is an enlarged rear view showing the configuration of the fixed blade and the duct according to the first embodiment of the present invention,

4B is a cross-sectional view taken along line B-B,

Figure 5 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the second embodiment of the present invention,

6 is an enlarged longitudinal sectional view showing the configuration of a propulsion device according to a second embodiment of the present invention;

Figure 7a is an enlarged rear view of the rotary blade according to the second embodiment of the present invention,

7B is a cross-sectional view taken along the line C-C,

Figure 8a is an enlarged rear view showing the configuration of the fixed blade and the duct according to the second embodiment of the present invention,

8B is a sectional view taken along the line D-D,

9 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the third embodiment of the present invention;

10 is an enlarged longitudinal sectional view showing the configuration of a propulsion device according to a third embodiment of the present invention;

11A is an enlarged rear view of a first rotary blade according to a third embodiment of the present invention;

11B is a sectional view taken along the line E-E,

12A is an enlarged rear view of a second rotary blade according to a third embodiment of the present invention;

12B is a sectional view taken along the line F-F,

Figure 13a is a rear view showing the configuration of the duct and the support according to a third embodiment of the present invention,

13B is a cross-sectional view taken along the line G-G.

<Code Description of Major Parts of Drawings>

1: Underwater Vehicle 1a: Body

1b: head 2: propulsion device

5: propulsion motor 6: electric shaft

6a: 1st transmission shaft 6b: 2nd transmission shaft

7: height 10: rotary blade

11: rotor blade hub 12: rotor blade

12a: Front blade edge of rotary blade 12b: Rear blade edge of rotary blade

L: Rotating blade section length 13: Key groove

20: fixed blade 21: fixed blade hub

22: fixed blade side 22a: fixed blade side front edge

22b: rear blade end of fixed blade 23: fixed blade fastening hole

24: female thread part 30: duct

31: duct fastening hole 32: duct assembly bolt

33: support 33a: support piece

33b: support hub 33c: insertion hole

40: first rotary blade 50: second rotary blade

In order to achieve the above object, the pump jet propulsion device of the present invention is provided with a plurality of rotary blades and a rotary blade connected to the electric shaft of the propulsion motor, and a plurality of fixed blades are provided in front or rear of the rotary blades It is characterized by consisting of a fixed blade and the duct is connected to the end of the fixed blade is arranged in a form surrounding the rotary blade and the fixed blade.

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

1 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the first embodiment of the present invention, Figure 2 is an enlarged longitudinal cross-sectional view showing the configuration of the propulsion device according to the first embodiment of the present invention the rear of the rotor blades The wake stator pump jet propulsion unit is provided with a fixed blade in the air.

In the drawing, 1 is an underwater vehicle, 1a is a body of the underwater vehicle, 1b is a head located at the whole of the underwater vehicle, and 2 is a propulsion unit installed at the rear end. The propulsion device 2 is connected to the transmission shaft 6 of the propulsion motor 5, the rotary blade 10 for generating a thrust, and the imbalanced torque generated by the rotary blade 10 to offset the torque balance The fixed wing 20 to maintain the, and the rotary wing 10 and the fixed wing 20 is disposed in the form of wrapping and consists of a hollow cylindrical duct 30 to reduce the noise by adjusting the inner flow.

3A and 3B are rear and cross-sectional views of the rotary blade 10, wherein the rotary blade 10 includes a key 7 and a key groove provided on an outer circumferential wall of an electric shaft 6 connected to the propulsion motor 5. Rotating blade hub 11 of a cone shape having a wider front portion and a narrower diameter gradually toward the rear, and a plurality of rotary blade pieces 12 arranged radially on the outer circumferential wall of the rotary blade hub 11. ), The rotary blade hub 11 and the rotor blade 12 is manufactured integrally by the precision casting method. Each of the rotary blade pieces 12 has a slightly larger radius of the front blade tip 12a on the basis of the diameter of the center line CL of the rotary blade 10 so as to maintain a constant gap with the inner surface of the duct 30. The radius of the rear blade tip 12b of the rotary blade is slightly smaller than the front blade tip 12a of the rotary blade, and the cross section length L of the rotor blade, referred to as the cord length, is the maximum value at the hub connection of the rotary blade 12. It is formed so that it is gradually reduced to have a substantially constant dimension to the end of the rotor blade piece (12).

4A and 4B are rear and cross-sectional views of the fixed blade 20 and the duct 30. The fixed blade 20 is located at the rear of the duct 30 and the rear wing 10, The rear end of the transmission shaft (6) is composed of a fixed blade hub of the cone shape rotatably inserted and a plurality of fixed blade pieces (22) formed radially on the outer circumferential wall of the fixed blade hub (21). The fixed blade piece 22 has an end portion of each of the fixed blade pieces 22 joined to the inner surface of the duct 30 so that a gap does not occur between the fixed blade pieces 22 and the duct 30, and each fixed blade piece 22 is formed. Since the end of the) is joined to the inner surface of the duct 30, that is, the tapered inclined surface, the diameter of the front edge portion 22a has a slightly larger diameter, and the diameter of the rear edge portion 22b is slightly smaller.

The duct 30 is configured in the form of an all-optical hollow cone having a cross section of an aircraft wing shape, and is manufactured integrally with the fixed blade 20 by a precision casting method.

Looking at the action of the wake stator pump jet type propulsion apparatus according to the first embodiment of the present invention having the configuration as described above are as follows.

When the propulsion motor 5 is driven, the rotational force through the transmission shaft 6 is transmitted to the rotary blade 10, the thrust is generated by the rotation of the rotary blade 10 and the rotor blade 12, the main The fixed blade 20 fixed to the rear of the devised rotary blade 10 to maintain the balance of the torque by generating a torque in the opposite direction to the thrust generated by the rotary blade 10, accordingly Transverse shaking and rotation moment of the moving body (1) is minimized. On the other hand, since the rotor blade 10 is configured to have a constant size rather than shortening the length of the cord at the end of each rotor blade 12, unlike the conventional propeller increases the amount of load acting on the end of the rotor blade 12 Due to this, the thrust of the rotary blade 10 is increased. In addition, the duct 30 according to the present invention surrounds each rotary blade piece 12 of the rotary blade 10 in a state of maintaining a small gap between the inner surface and the end of the rotary blade piece 12. Since the end of each fixed blade piece 22 of the fixed blade 20 is fixed to the rear end of the inner surface of the duct 30, the cavitation by adjusting the inflow flow from the rotary blade 10 in accordance with the countercurrent flow of the underwater vehicle This suppresses the occurrence of this and thereby serves to significantly reduce the radiation noise generated by the rotary blade (10).

Figure 5 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the second embodiment of the present invention, Figure 6 is an enlarged longitudinal cross-sectional view showing the configuration of the propulsion device according to a second embodiment of the present invention the front of the rotary blades The current stator pump jet propulsion unit is provided with a fixed blade.

7A and 7B are a rear view and a cross-sectional view of the rotary blade 10, wherein the rotary blade 10 is predetermined on a hollow cone-shaped rotary blade hub 11 into which the transmission shaft 6 is fitted and its outer peripheral wall. Consists of a plurality of rotary blade pieces 12 arranged radially at an angle, such a rotary blade hub 11 and the rotary blade pieces 12 are manufactured integrally by a precision casting method. Each of the rotary blade pieces 12 has a slightly larger radius of the front blade tip 12a on the basis of the diameter of the center line CL of the rotary blade 10 so as to maintain a constant gap with the inner surface of the duct 30. The radius of the rear blade tip 12b of the rotary blade is slightly smaller than the front blade tip 12a of the rotary blade, and the cross section length L of the rotor blade, referred to as the cord length, is the maximum value at the hub connection of the rotary blade 12. It is formed so that it is gradually reduced to have a substantially constant dimension to the end of the rotor blade piece (12).

8A and 8B are a rear view and a cross-sectional view of the fixed blade 20, the fixed blade 20 is coupled to the inside of the duct 30 is located in front of the rotary blade 10, the transmission shaft ( 6) is composed of a hollow cone-shaped fixed blade hub 21 is rotatably inserted and a plurality of fixed blade pieces 22 formed radially on the outer peripheral wall. The fixed blade piece 22 has its end fixed to the inner surface of the duct 30. Each fixed blade piece 22 has a slightly larger diameter of its front blade portion 22a, and a smaller diameter of its rear blade portion 22b. The end of each fixed blade piece 22 is in close contact with the inner surface of the hollow truncated cone-shaped duct 30, the female screw portion 24 is coupled to the duct 30 at the end of each fixed blade piece 22 formed as described above Formed. In addition, the fixed blade hub 21 has a plurality of fixed blade fastening holes 23 for coupling the fixed blade 20 to the rear end of the body portion 1a of the underwater vehicle, the shaft insertion hole of the fixed blade hub 21. It is formed along the direction.

The duct 30 is composed of an all-in-one narrow conical shape having a cross section of an aircraft wing, the duct fastening hole 31 is coupled to the fixed blade piece 22 is formed, the duct 30 is a duct assembly bolt It is assembled to the fixed blade 20 by the (32).

Looking at the operation of the current stator pump jet system propulsion apparatus according to a second embodiment of the present invention having the above configuration is as follows.

The rotational force is transmitted to the rotary blade 10 through the transmission shaft 6 connected to the propulsion motor 5 and the rotary blade 10 is the thrust generated by the rotation, which is located in front of the rotary blade 10 The fixed blade 20 uniformly rectifies the flow of non-uniform fluid flowing into the rotary blade 10 to provide a uniform flow field to the rotary blade 10 and minimize abnormal load. In addition, the rotary blade 10 and the fixed stator blade 20 that rotates to minimize the lateral oscillation and rotation moment of the underwater vehicle (1) by generating a torque in the opposite direction.

And the rotor blade 10 is different from the conventional propeller as in the first embodiment, because the cord length of each end of the rotor blades 12 is configured to have a predetermined size without shortening at the end of the rotor blades 12 This increases the amount of load applied, thereby increasing the thrust of the rotary blade (10). In addition, the duct 30 also surrounds each rotor blade 12 of the rotary blade 10 in a state of maintaining a small gap between its inner surface and the end of the rotor blade 12 as in the first embodiment. In addition, since the end of each of the fixed blade piece 22 of the fixed blade 20 is fixed to the inner surface of the duct 30, by controlling the internal flow from the rotary blade 10 of the underwater vehicle to generate the phenomenon of cavitation It is suppressed and thereby serves to significantly reduce the radiation noise generated by the rotary blade (10).

9 is a partial longitudinal cross-sectional view showing the overall configuration of the underwater vehicle according to the third embodiment of the present invention, Figure 10 is an enlarged longitudinal cross-sectional view showing the configuration of the propulsion device according to a third embodiment of the present invention in the opposite direction An inverted rotor pump jet propulsion device is provided with two rotating vanes, a first rotary vane and a second rotary vane.

11A and 11B are rear and sectional views of the first rotary blade 40, and FIGS. 12A and 12B are rear and sectional views of the second rotary blade 50, and the first rotary blade 40 is The first motor shaft 6a of the large diameter connected to the propulsion motor 5 is coupled, and the second rotary blade 50 is coupled to the second motor shaft 6b of the small diameter. The first and second rotary blades 40 and 50 have a hollow cone-shaped rotary blade hub 11 coupled by a key groove 13, and a plurality of rotary blade pieces 12 radially disposed on the outer circumferential wall thereof. It consists of, such a rotor blade hub 11 and the rotor blade piece 12 is manufactured integrally by the precision casting method.

Each of the rotary blade pieces 12 has a slightly larger radius of the front blade tip 12a on the basis of the diameter of the center line CL of the rotary blade 10 so as to maintain a constant gap with the inner surface of the duct 30. The radius of the rear blade tip 12b of the rotary blade is slightly smaller than the front blade tip 12a of the rotary blade, and the cross section length L of the rotor blade, referred to as the cord length, is the maximum value at the hub connection of the rotary blade 12. It is formed so that it is gradually reduced to have a substantially constant dimension to the end of the rotor blade piece (12).

13A and 13B are rear and cross-sectional views of the duct 30 and the support 33, wherein the duct 30 has an all-in-one narrow cone shape having a cross section of an aircraft wing shape, and the support 33 is the It consists of a support hub 33b having an insertion hole 33c into which the end of the second transmission shaft 6b is inserted, and a cross support 33a for supporting the support hub 33b and the duct 30. It is manufactured in one piece by precision casting method.

Looking at the operation of the reverse rotor pump jet type propulsion apparatus according to a third embodiment of the present invention having the above configuration is as follows.

When the propulsion motor 5 is driven, rotational force is transmitted to the first rotary blade 40 and the second rotary blade 50 through two transmission shafts 6a and 6b which rotate in opposite directions. Underwater motion 1 is driven by the thrust generated by the rotation of the rotary blades (40, 50). In addition, the first rotary blade 40 and the second rotary blade 50 to maintain the torque balance by generating torque in the opposite direction to each other, thereby minimizing the lateral fluctuation and rotation moment of the underwater vehicle (1) .

In addition, unlike the conventional propeller, the rotary blade 10 is configured to have a constant size without shortening the length of the cord at each end of the rotor blades, as in the first and second embodiments, so that the rotor blades 12 end. This increases the amount of load acting on the part, thereby increasing the thrust of the rotary blade (10). In addition, since the duct 30 also surrounds each rotor blade 12 of the rotary blade 10 in a state of maintaining a small gap between the inner surface and the end of the rotor blade 12, the rotor blade of the underwater moving body By controlling the internal flow from the (10) part to suppress the occurrence of the phenomenon of cavitation and thereby serves to significantly reduce the radiation noise generated by the rotary blade (10).

As described above, the present invention is a device that meets the hydrodynamic characteristics of the underwater moving body that requires high speed, low noise, by adopting a pump jet propulsion device consisting of a rotary blade, a fixed blade and a duct surrounding the end of the rotary blade Minimize the gap flow between the inner surface of the duct and the load on the tip of the rotor blade, increase the propulsion efficiency in the water, reduce the radiation noise generated by the rotor blade due to the use of the duct. Using an inverting rotor has the effect of balancing the underwater vehicle by torque balance.

Claims (11)

A rotor (10) connected to the electric shaft (6) of the propulsion motor (5) installed at the rear of the body (1a) of the underwater vehicle (1) and generating a propulsion force; A stator 20 installed at the rear of the rotary blade 10 so as to offset an unbalanced torque generated by the rotary blade 10; Propulsion apparatus of the underwater vehicle, characterized in that the rotating wing 10 and the fixed wing 20 is arranged in a form surrounding the duct (30) to reduce the cavitation and radiation noise. According to claim 1, The rotary blade 10 is a plurality of rotary blade pieces (12) radially arranged on the outer circumferential wall of the rotary blade hub 11 is fixed to the transmission shaft (6), Propulsion device of the underwater moving object is arranged so that the end of each of the rotor blades 12 maintains a constant small gap with the inner surface of the duct (30). The fixed blade (20) is provided with a plurality of fixed blade pieces (22) on the outer circumferential wall of the fixed blade hub (21) into which the transmission shaft (6) is inserted. Propulsion device of the underwater body is fixed to the end of the duct (30) integrally connected to the inner surface. The apparatus of claim 1, wherein the duct (30) has a conical hollow main wall having a diameter wider in the front and gradually narrower toward the rear, and the cross section of the hollow main wall has a streamlined cross section. A rotary blade 10 connected to the electric shaft 6 of the propulsion motor 5 installed at the rear of the body portion 1a of the underwater vehicle to generate a propulsion force; A fixed blade (20) installed in front of the rotary blade (10) to rectify the inflow flow acting on the rotary blade to generate torque in the opposite direction to the torque generated by the rotary blade (10); Propulsion apparatus of the underwater vehicle, characterized in that the rotating wing 10 and the fixed wing 20 is arranged in a form surrounding the duct (30) to reduce the cavitation and radiation noise. According to claim 5, The rotary blade 10 is a plurality of rotary blades 12 are radially disposed on the outer circumferential wall of the rotary blade hub 11 is fixed to the transmission shaft 6, each of the rotary blades Propulsion apparatus of the underwater moving body is disposed so that the end of the (12) maintains a constant small gap with the inner surface of the duct (30). The fixed blade (20) is provided with a plurality of fixed blade pieces (22) on the outer circumferential wall of the fixed blade hub (21) into which the transmission shaft (6) is inserted. Propelling apparatus of the underwater moving body is fixed in close contact with the inner surface of the duct (30) by the end of the fastening means 32 is fastened through the circumferential wall of the duct (30). 6. The propulsion apparatus for an underwater vehicle according to claim 5, wherein the duct (30) has a conical hollow main wall having a diameter wider in the front and gradually narrower toward the rear, and the cross section of the hollow main wall has a streamlined cross section. A first rotary blade 40 connected to the first electric shaft 6a in the forward direction of the propulsion motor 5 installed at the rear of the body portion 1a of the underwater vehicle to generate propulsion force; It is disposed in the rear of the first rotary blade 40 is connected to the second transmission shaft (6b) in the reverse direction of the propulsion motor (5) to generate torque in the opposite direction to the first rotary blade (40) A second rotary blade 50; Propulsion apparatus of the underwater vehicle, characterized in that the first and second rotary blades (40, 50) are arranged in a form surrounding the duct (30) to reduce the cavitation and radiation noise. 10. The rotary blades of claim 9, wherein the first rotary blades 40 and the second rotary blades 50 are fixed to the first transmission shaft 6a in the forward direction and the second transmission shaft 6b in the reverse direction. A plurality of rotary blade pieces 12 are provided on the outer circumferential wall of the hub 11, and ends of the rotary blade pieces 12 of the first and second rotary blades 40 and 50 are connected to the inner surface of the duct 30. Propulsion device of the underwater vehicle disposed to maintain a constant micro clearance. 10. The method of claim 9, wherein the duct 30 is formed of a hollow main wall having a diameter and a streamlined cross-section of the diameter of the front and gradually narrower toward the rear, the rear end of the inner surface of the hollow main wall and the second transmission shaft A propulsion apparatus for an underwater vehicle connected and supported by a plurality of support pieces (33a) arranged between support hubs (33b) inserted and supported by (6b).