KR20190011575A - Propeller - Google Patents

Abstract

The present invention relates to a propeller rotated by a driving source to generate propelling force, which remarkably improves a structure of the propeller to amplify propelling force in accordance with a fluid flow due to rotation of the propeller. To this end, according to the present invention, the propeller comprises: a fixing hole (21) formed to insert and fix a shaft in the center of a main body (20); a plurality of first inlet spaces (40) opened on the front surface of the main body (20) to receive fluid (30) in rotation of the main body; a fluid flowing space (50) gradually narrowed from each first inlet space (40) while maintaining a predetermined angle (θ) with a central shaft; a fluid outlet space (60) opened on the rear surface of the main body (20), which is an end of the fluid flowing space (50), to generate propelling force while the fluid (30, 31) passing through each fluid flowing space (50) goes out at a high speed; a second inlet space (70) formed on the circumferential surface of the main body (20) to communicate with each fluid flowing space (50) so as to supply the fluid (31) to the fluid flowing space (50) when the main body (20) is rotated; and a fluid inlet line (80) protruding outward toward the rotational (C) side of the main body (20) more than the main body (20) to guide the fluid (31) to the fluid flowing space (50) through each second inlet space (70) when the main body (20) is rotated.

Description

Propeller {Propeller}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a propeller that generates propulsive force as it is rotated by a driving source, and more particularly, to a propeller that dramatically improves the structure of a propeller to amplify propulsive force according to a fluid flow caused by rotation of the propeller.

Generally, a propeller installed on the rear end side of a ship is immersed in water at a certain depth so as to quickly discharge water around the rear side, thereby allowing the ship to move forward in reaction.

In this propeller-type ship, the water discharged to the rear side for propulsion has a vortex shape having constant intensity and size by the rotational force of the propeller, and gradually spreads to the water to weaken the flow.

Partial load (partial load) is caused by the phenomenon that when the propeller is rotated, the cross section of the flowing water changes suddenly, or when the direction of flow changes, a cavity is formed near the propeller, , Which causes noise and vibration. In heavy loads, cavitation is generated which causes corrosion on the back side of the wing car.

In the case where cavitation due to the rotation of the propeller is generated, the propulsion of the ship is lowered and the consumption of the fuel is increased. Therefore, due to the disadvantage of economical disadvantage, a lot of research and development has been carried out in the related industry in order to prevent cavitation caused by rotation of the propeller. It has not achieved satisfactory results.

Cavitation due to the rotation of the propeller occurs not only in vessels but also in airplanes and drones, which have become popular in recent years.

Therefore, a new type of propeller has been developed to prevent the propulsive force from being deteriorated by the cavitation caused by the rotation of the propeller, and has been registered as Utility Model No.0337402.

1 and 2 are a front view and a side view of a conventional propeller, in which a pressure equalizing hole 3, an induction duct 5, and a collar 4 are added to a conventional propeller structure.

Therefore, when the propeller rotates at a high speed and cavitation occurs, the pressure of the central part of the propeller drops abnormally and cavitation occurs in this part.

At this time, if the pressure equalizing hole 3 is drilled in the propeller shaft 1, the seawater or fluid flows out to the center portion of the propeller through the pressure equalizing hole 3 by the pressure difference before and after the propeller.

In this case, since the pressure at the portion where cavitation occurs in the center of the propeller is almost equal to the pressure before the propeller, the propulsion efficiency of the propeller is increased as well as the reduction or suppression of the occurrence of cavitation.

However, since the pressure rise in the portion where the cavitation occurs may not be sufficient, the induction duct 5 is also installed to guide the fluid flowing through the propeller directly to the portion where the cavitation occurs, so that a sufficient pressure rise is achieved.

This cavitation is not generated only at the center of the propeller, but also at the end of the propeller, an abnormal pressure drop occurs and cavitation occurs. This part also reduces or suppresses the occurrence of cavitation by preventing an abnormal pressure drop.

In addition, the cavitation at the end of the propeller is a phenomenon in which the pressure pumping phenomenon occurs abnormally because the portion of the propeller pumping is opposite to the flow of the fluid immediately outside the propeller. Therefore, the fluid flow (velocity distribution) Thereby reducing or eliminating the occurrence of cavitation by reducing or eliminating abnormal pressure drop phenomena.

That is, the cavitation occurring at this part (the end of the propeller) causes the vents (4), which are the parts that do not change the velocity of the fluid, to smooth the fluid flow (velocity distribution) at the end of the propeller and its immediate outer part So that cavitation can be reduced or suppressed by preventing the sudden change in velocity of the fluid at the tip of the propeller.

(Prior art document)

(Patent Document 0001) Korean Utility Model Registration No. 20-0337402 (registered on Dec. 18, 2003)

(Patent Document 0002) Registered Utility Model No. 20-0406520 (Registered on November 11, 2006)

(Patent Document 0003) Korean Utility Model Registration No. 20-0406519 (Registered on November 11, 2006)

(Patent Document 0004) Korean Published Patent Application No. 10-2002-0061809 (published on July 25, 2002)

(Patent Document 0005) Korean Patent Laid-Open No. 10-2012-0121209 (published on May 11, 2012)

However, in order to prevent cavitation caused by the rotation of the propeller, such a conventional propeller has a pressure equalizing hole formed in the propeller shaft, thereby lowering the strength of the propeller shaft and deteriorating the productivity due to the installation of a separate induction duct and a collar. .

It can also benefit from reducing cavitation during propeller rotation, but it can not amplify the thrust, and limits the propeller to aircraft or drones.

SUMMARY OF THE INVENTION The present invention has been conceived to solve such a problem of the prior art, and it is an object of the present invention to provide a fluidized bed apparatus and a fluidized bed apparatus, And it is possible to amplify the propulsive force while quickly getting out to the fluid discharge space.

Another object of the present invention is to make it possible to apply the propeller to an aircraft or a dron as well as a vessel without changing the structure of the propeller.

According to an aspect of the present invention for achieving the above object, there is provided an apparatus for controlling a flow of a fluid, comprising: a stationary hole formed in a center of a main body to which an axis is inserted and fixed; A fluid flow space formed to gradually narrow from the first inflow space while maintaining a predetermined angle with a central axis; and a fluid flow space formed to open at a rear surface of the body, which is an end of each fluid flow space, A fluid inflow space formed on the circumferential surface of the main body so as to communicate with each fluid flow space to allow the fluid to flow into the fluid flow space when the main body rotates, , And is formed to protrude outward from the main body toward the rotation direction side of the main body, so that the fluid flows through the second inflow space And a fluid inflow line leading to the flow space side.

The present invention increases the pressure by causing the fluid to flow in a swirling state by the fluid introduced into the second inflow space by the fluid inflow line while allowing the fluid to flow into the fluid flow space formed in the body, The cross sectional area is gradually narrowed toward the side, so that the propulsion force can be greatly increased, and the fuel saving effect can be expected.

1 shows a prior art propeller having a front view
2 is a side view of a conventional propeller
3 is a perspective view showing a front surface of the propeller of the present invention.
4 is a perspective view showing the back surface of the propeller of the present invention.
Figure 5 is a side view of the propeller of the present invention
6 is a schematic view showing a fluid flow space in the present invention

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

FIG. 3 is a perspective view showing the propeller of the present invention. FIG. 4 is a perspective view showing the propeller of the present invention. FIG. 5 is a side view of the propeller of the present invention. A first inflow space 40 formed in the main body 20 so as to allow the fluid 30 to flow therein when the main body 20 rotates; A fluid discharge space 60 through which the fluid that has passed through the respective fluid flow spaces 50 is discharged and a fluid discharge space 60 formed on the circumferential surface of the main body 20, A second inflow space 70 for introducing the fluid into the fluid flow space 50, and a fluid inflow line 80 for guiding the fluid to the fluid flow space 50 side.

The fixing hole 21 is formed at the center of the main body 20, and an axis (not shown) rotating by the power generating means is inserted and fixed.

The first inflow space 40 is formed in a plurality of openings on the front surface of the main body 20 so that the fluid 30 flows into the main body 20 when the main body 20 rotates.

Although the number of the first inflow spaces 40 is four in FIG. 3 and FIG. 4 shown in the embodiment of the present invention, the number of the first inflow spaces 40 can be appropriately designed according to the size of the propeller. There is no need.

The fluid flow space 50 is formed to be gradually narrowed from the first inflow space 40 while maintaining a predetermined angle? With respect to the central axis so that the fluid 30 (31) .

It is preferable that the fluid flow space 50, which is gradually narrowed from the first inflow space 40, is formed to be inclined at an angle of 40 to 60 degrees with respect to the central axis.

When the angle [theta] is less than 40 degrees, when the fluid 30 flows into the fluid flow space 50 due to the rotation of the main body 20, there is a fear that the consumption of the fuel increases due to the resistance, The fluid 30 (31) flowing into the fluid-flow space (50) quickly escapes and the propulsion force may drop.

As shown in FIG. 4, the fluid discharge space 60 is formed to open at the rear surface of the main body 20, which is the end of each fluid flow space 50, to generate a swirling fluid 30 (FIG. 31) is rapidly emerging as a driving force.

The second inflow space 70 is formed on the circumferential surface of the main body 20 so as to communicate with the fluid flow space 50 to allow the fluid 31 to flow into the fluid flow space 50 when the main body 20 rotates .

It is preferable that the fluid flow space 50 and the second inflow space 70 are curved in a helical shape so that the resistance of the fluid flowing into the fluid flow space 50 is minimized .

The fluid inflow line 80 is formed to protrude outward from the main body 20 toward the rotation direction C of the main body 20 so that the fluid 31 flows into the second inflow space 70 To the fluid flow space 50 side.

The projection amount of the fluid inflow line 80 for guiding the fluid 31 toward the fluid flow space 50 through the second inflow space 70 gradually increases from the first inflow space 40 to the fluid discharge space 60 Is more preferable.

This allows the fluid inflow line 80, which serves to introduce the fluid 31 into the fluid flow space 50 in accordance with the rotation of the main body 20, such that a large amount of the fluid 31 is introduced at the inlet side, So that the inflow amount of the fluid 31 gradually decreases toward the space 60 so that the fluid 30 passes through the fluid flow space 50 and swirls out.

The operation of the present invention will be described below.

First, when the main body 20 rotates counterclockwise in a state where the propeller of the present invention is fixed to the shaft of the power generating means, the fluid 30 flows into the first inflow space 40 formed on the front surface of the main body 20 The other fluid 31 flows in the direction of the arrow in FIG. 5 by the fluid inflow line 80 formed to protrude from the circumferential surface of the main body 20 in accordance with the rotation of the main body 20, And then flows into the fluid flow space 50.

The fluid inflow line 80 is formed to have a small amount of protrusion toward the fluid discharge space 60 so that a large amount of the fluid 31 flows into the fluid flow space 50 at a position close to the first inflow space 40 side, But the inflow amount of the fluid 31 decreases toward the fluid discharge passage 60 side.

As described above, when the main body 20 rotates and a large amount of the fluid 30 flows into the fluid flow space 50 through the first inflow a HD 40, 31 flows into the fluid flow space 50 through the second inflow space 70 and flows into the first inflow space 40 by the fluid 31 flowing into the fluid flow space 50 The fluid flow space 50 is formed in such a shape that the cross-sectional area gradually decreases as it goes toward the fluid discharge air passage 60 side, so that the fluid flow space 50 quickly falls into the fluid discharge space 60 So that the driving force is greatly amplified.

The propeller of the present invention, which amplifies the propulsion force while discharging the fluid into the outflow discharge space 60 through the fluid flow space 50 as described above, can be widely applied not only to ships but also to propellers of aircrafts and drones as well as impellers of pumps It is understandable to be able to.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied with various changes and modifications without departing from the scope of the invention. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being described in the foregoing specification is defined by the appended claims, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

20: main body 30, 31: fluid
40: first inflow space 50: fluid flow space
60: fluid discharge space 70: second inflow space
80: Fluid inlet line

Claims (4)

A plurality of openings formed in the front surface of the main body 20 to allow the fluid 30 to flow through the main body 20 when the main body 20 rotates, (50) formed to gradually narrow from the first inflow space (40) while maintaining a predetermined angle (?) From the center axis, and a second fluid inflow space A fluid discharge space 60 formed to open on the rear surface of the main body 20 so as to generate a driving force while rapidly discharging the fluid 30 (31) passing through each fluid flow space 50, A second inflow space 70 formed on the circumferential surface of the main body 20 to communicate with the respective fluid flow spaces 50 to introduce the fluid 31 into the fluid flow space 50 when the main body 20 rotates, And is formed so as to protrude outward from the main body 20 toward the rotation direction C of the main body 20 so that when the main body 20 rotates, Propellers that consists of a fluid inlet line (80) for guiding fluid flow toward the space 50 via the input space 70, characterized.
The method according to claim 1,
Characterized in that the fluid flow space (50) formed to gradually narrow from the first inflow space (40) is formed to be inclined at an angle of 40 to 60 ° with the central axis.
The method according to claim 1 or 2,
Wherein the fluid flow space (50) and the second inflow space (70) are curved in a spiral shape.
The method according to claim 1,
The projection amount of the fluid inflow line 80 for guiding the fluid 31 toward the fluid flow space 50 through the second inflow space 70 gradually increases from the first inflow space 40 to the fluid discharge space 60 Is formed to be small.

Images