KR101717467B1 - Blade for waterwheel - Google Patents

Abstract

The present invention relates to a blade for a waterwheel, comprising: a pressing curved surface portion provided on one surface of the blade and pressed by flowing water; and a protruding curved surface portion provided on a back surface of the pressing curved surface portion and preventing interference by sliding a fluid colliding to the blade to one side or the other side, wherein the protruding curved surface portion has a protruding rib formed thereon having an inclined surface on which the fluid slides, and the present invention further comprises a refraction prevention portion that prevents the protruding rib from being distorted by a fluid boundary surface when the protruding rib passes through an interface of the fluid.

Description

{BLADE FOR WATERWHEEL}

The present invention relates to an aerator blade, and more particularly, to an aerator blade used in a hydroelectric generator or a small hydropower generator, wherein flowing water is dewatered to one side of a blade to convert a linear movement of water into rotational motion of the blade, To an aerator blade capable of reducing friction between fluids and preventing the blade passing through the interface of the fluid from being refracted.

Generally, a small hydroelectric power generation is installed in a place where the flow rate is low and the drift is small, and electricity is produced. In general, a small hydro power generation facility uses a flow of water discharged through a drain pipe to rotate an aberration, So that power generation is achieved by driving the generator.

Such a small-scale hydroelectric power generation facility requires an excessively large initial construction cost, and it is difficult to obtain a required power generation capacity when the flow rate is small or low, and the power generation capacity varies greatly depending on the amount of precipitation.

In particular, the weight of the aberration that converts the energy of the water to the rotational energy consumes a lot of the energy required for the rotation of the aberration, resulting in a decrease in the power generation efficiency, while the water hit the blade of the aberration can not be discharged quickly, The rotation is often performed, and the rotation efficiency of the aberration can not be increased.

When the rotational efficiency of the aberration is low as described above, when the fall energy is converted into the rotational energy, the conversion rate is low, so there is an inefficient problem that only a small amount of electricity is consumed but a small amount of electricity is consumed.

In addition, when the hydro-electric power is generated, the water in the upper layer falls down to the aberration, so that the floating matter in the upper layer hits the blade of the aberration, thereby causing the aberration to be damaged or the rotation of the aberration to be interrupted.

In order to solve the above-mentioned problem, a water turbine for small-hydro-power generation has been developed. The water turbine for small-scale hydroelectric power generation according to the prior art includes water discharged from a river through a drain pipe, The water inlet of the inflow pipe is installed at a position lower than the water gate for controlling the discharge and the aberration which is located at the lower part of the water pipe and is rotated by the energy of the water, And a space plate is formed between the blades of the aberration drum and the aberration drum is installed inside the aberration drum to block the space when the aberration drum rotates. .

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2012-0013812 (published on February 15, 2012, entitled "Hydro turbine for small hydroelectric power generation").

Since the rear surface of the blade is formed in a flat shape, when the blade is installed inside the case in which the fluid is filled, the rear surface of the blade interferes with the fluid filled in the case, The rotation speed of the aberration is not increased in proportion to the flow velocity.

In addition, since the rear surface of the blade is formed in a planar shape when the blade passes through the interface of the fluid, the turbine of the fluid and the back surface of the blade collide with each other to reduce the rotational force and rotational speed of the aberration There is a problem that the power generation amount is reduced.

Therefore, there is a need for improvement.

The present invention relates to a hydropower generator or a small hydropower generator, in which flowing water is dewatered to one side of a blade to convert the linear motion of the water into rotational motion of the blade, reduce friction between the rotating blade and the fluid, And it is an object of the present invention to provide an aerator blade capable of preventing a passing blade from being refracted.

The present invention relates to a pressure application apparatus, comprising: a pressing surface portion provided on one surface of a blade and pressurized by flowing water; And a protruding curved surface portion provided on a back surface of the pressure curved surface portion and preventing interference by sliding the fluid impinging on the blade to one side and the other side, wherein the protruding curved surface portion is formed with a protruding rib having a slanted surface, And a refraction preventing portion for preventing the protruding rib from being refracted by the fluid interface when the protruding rib passes through the interface of the fluid.

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In addition, the refraction preventing portion of the present invention includes a refraction preventing groove portion formed in the protruding rib so that the fluid is drained when the protruding rib passes through the interface of the fluid.

Since the water blading blade according to the present invention is provided with the pressurized curved surface portion that provides the rotational force by flowing the flowing water, it is possible to effectively convert the linear motion of the flowing water into the rotational motion of the aberration, The power generation amount can be increased.

In addition, since the aberration-imparting blade according to the present invention is provided with the protruding curved surface portion on the back surface of the pressing curved surface portion, when the fluid collides with the back surface of the rotating blade, the fluid slides along the curved surface inclined portion of the protruding curved surface portion, It is possible to prevent the rotation speed of the aberration from being reduced due to the interference between the fluid and the blade even if an aberration is provided inside the case constituting the power generation device.

Further, in the aerator blade according to the present invention, the protruding rib is provided on the back surface of the pressure curved surface portion, so that when the blade passes the interface of the fluid, the protruding rib passes the interface while grasping the fluid on both sides, There is an advantage that interference can be suppressed.

In the airstream blade according to the present invention, since the inclined surface and the anti-refraction groove are formed at the ends of the protruding ribs, the fluid which is separated at both sides by the protruding rib slides along the inclined surfaces of the protruding ribs, There is an advantage that it is possible to prevent the rotational motion from being interfered with and to prevent the rotational speed of the aberration from being kept equal to or higher than the set value and the power generation amount to be reduced.

The blade for an airstream according to the present invention is provided with a refraction preventing groove formed concavely inwardly at the end of the protruding rib so that when the end of the protruding rib collides against the interface of the fluid, the fluid flows into the refraction preventing groove It is advantageous in that the end of the protruding rib is prevented from being separated from the one side or the other side while colliding with the interface of the fluid because it is discharged to the outside along the inclined portion of the curved surface.

1 is a perspective view showing an airstream blade according to an embodiment of the present invention.
2 is a plan view showing an aerator blade according to an embodiment of the present invention.
3 is a cross-sectional view illustrating an aerator blade according to an embodiment of the present invention.
4 is a side view of an aerator blade according to an embodiment of the present invention.
5 is a plan view showing the aberration of the aberration blades according to the embodiment of the present invention.
FIG. 6 is a side cross-sectional view illustrating a small hydrostatic power generating apparatus having an aerator blade according to an embodiment of the present invention.
Fig. 7 is a top cross-sectional view showing a small hydroelectric generating apparatus having an aerator blades according to an embodiment of the present invention. Fig.

Hereinafter, an embodiment of the aerator blade according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view showing an aerator blade according to an embodiment of the present invention, FIG. 2 is a plan view showing an aerator blade according to an embodiment of the present invention, and FIG. 3 is a cross- Sectional view showing the water-receiving blade according to the embodiment of the present invention.

4 is a side view illustrating an aberration-compensating blade according to an embodiment of the present invention, and Fig. 5 is a plan view illustrating aberration of an aberration-compensating blade according to an embodiment of the present invention.

1 to 5, an aerator blade 30 according to an embodiment of the present invention includes a pressure curved surface portion 34 provided on one surface of a blade 30 and pressed by flowing water, And a protruding curved surface portion 36 provided on the back surface of the portion 34 to prevent the fluid from colliding with the blade 30 to one side and the other side to prevent interference.

Therefore, when the flowing water is rotated by pressing the blade 30, the water is drained into the pressing curved surface portion 34 to rotate the blade 30. When the blade 30 is rotated about the driving shaft 16, The water moves from the curved surface portion 34 to the outside of the blade 30 while sliding.

The blade 30 of the present embodiment further includes the drive panel 30a provided on the drive shaft 16 and the engagement groove 32 connected to the drive panel 30a so that the blade 30 is formed integrally with the drive shaft 16 A plurality of blades 30 can be installed on the driving panel 30a while maintaining a predetermined gap therebetween.

At this time, the protruding curved surface portion 36 formed on the back surface of the blade 30 passes through the fluid filled in the case in which the blade 30 is installed, that is, the fluid composed of water or air, It is possible to prevent interference with the fluid due to collision with the fluid.

The present embodiment also includes a protruding rib 36 projecting from the protruding curved surface portion 36 and for canceling the impact while reducing the area where the protruded curved surface portion 36 collides with the fluid when the protruded curved portion 36 is received in the fluid 38 are formed by the protruded curved surface portion 36 and the protruded rib 38 provided on the back surface of the pressing surface portion 34 when the blade 30 is rotated by water colliding with the pressing surface portion 34, It is possible to reduce the impact between the fluid filled in the case 30 and the fluid filled in the case and to rotate the blade 30.

Since the inclined surface 38a having a narrow cross-sectional area is formed at the end of the projecting rib 38, the fluid slides along the inclined portion formed by the inclined surface 38a and the projecting inclined surface 38a of the projecting rib 38, The friction between the fluid 30 and the fluid is reduced, so that the rotational speed of the blade 30 can be increased in proportion to the flow rate and the flow rate of the water.

In addition, the present embodiment is provided with a refraction preventive portion that prevents the projecting ribs 38 from being refracted when passing through the interface of the fluid.

It is possible to reduce the friction between the blade 30 and the fluid by the protruding ribs 38 and the protruding curved surface portions 36. However, when the ends of the protruding ribs 38 pass through the boundary of the fluid, The protruding rib 38 is provided with the anti-refraction portion at the end of the protruding rib 38 so that the protruding rib 38 is not refracted when the protruding rib 38 passes the interface of the fluid, Through the interface.

When the blade 30 is rotated by the pressing force of the water, the projecting ribs 38 formed on the back surface of the blade 30 pass through the interface of the fluid, And then the blade 30 slides along the inclined surface 38a and the protruding curved surface portion 36 so as to pass through the inside of the case filled with the fluid.

Since the refraction preventing portion includes the refraction preventing groove portion 38b formed at the end portion of the protruding rib 38 and formed concavely in the inside direction, the fluid that impinges on the protruding rib 38 is introduced into the refraction preventing groove portion 38b The fluid is moved outside the protruding ribs 38 without hitting the ends of the protruding ribs 38 on one side or the other side because the protruding ribs 38 are slid along the refraction preventing grooves 38b formed in the curved surface and discharged outward.

Since the end of the protruding rib 38 is formed with the refraction preventing groove portion 38b recessed inwardly as described above, the protruding rib 38 is formed at one side or the other side of the protrusion rib 38 Can be refracted and interfere with the interface of the fluid.

FIG. 6 is a side sectional view showing a small hydrostatic generator having an aerator blades according to an embodiment of the present invention, and FIG. 7 is a view of a small hydrostatic generator having a water blading blade according to an embodiment of the present invention Flat section.

6 and 7, a small hydrostatic generator having an aerator blades according to an embodiment of the present invention includes an upper case 14 having an inflow pipe 14a through which water flows on one side, A blade 30 rotatably installed in the upper case 14 and rotated by water supplied to the inflow pipe 14a; a rotor 30 connected to the drive shaft 16 of the blade 30, And a lower case 12 disposed on a plane spaced apart from the upper case 14 and having a discharge pipe 12a to be discharged after the water rotated by the blade 30 is dropped.

When the water is supplied through the inlet pipe 14a, the water flows into one side of the upper case 14 to rotate the blade 30, and the water rotated by the blade 30 is rotated in a spiral shape, And is discharged to the outside of the case through the discharge pipe 12a.

As described above, according to the present embodiment, the water, which is rotated in the rotating upper case 14, falls downward while swirling after rotating the blade 30, is rotated inside the lower case 12, And is discharged to the outside of the lower case 12 through a discharge pipe 12a extending in a direction opposite to the inflow pipe 14a from one side.

The water dropped from the upper case 14 is swirled and discharged to the outside of the lower case 12 along the discharge pipe 12a so that the water rotated by the blade 30 flows into the upper case 14 It does not remain.

Therefore, the water that is rotated inside the upper case 14 is rotated by about 180 degrees in the upper case 14 and then falls into the lower case 12, so that the vortex is generated by the water remaining in the upper case 14 So that the speed of the blade 30 can be increased in proportion to the increase of the flow rate of the water without interfering with the blade 30 and the water.

The upper case 14 is formed larger in diameter than the lower case 12 and a part of the upper case 14 is disposed on the same vertical plane as a part of the lower case 12, The lower case 12 and the lower case 12 are connected in a stepped manner.

Since the upper case 14 is formed to have a larger diameter than the lower case 12, the water flowing along the inflow pipe 14a in the linear motion moves in the inner wall of the upper case 14, And the upper case 14 adjacent to the inflow pipe 14a is connected to the lower case 12 so as to be stepped therebetween.

The water flowing into the upper case 14 is rotated along the inner wall and the step of the upper case 14 to rotate the blade 30 and the lower end of the upper case 14 And the lower case 12 are arranged on the same vertical plane without a step so that the water which is rotated along the upper case 14 and the stepped portion gradually falls downward and the upper case 14 and the lower case 12 All of the water drops into the lower case 12 while entering the section arranged on the same vertical plane, and the water flowing into the upper case 14 falls into the lower case 12 without remaining water.

Therefore, it is possible to prevent the water remaining in the upper case 14 from interfering with the blade 30 while interfering with the rotational motion of the blade 30, so that the rotational motion of the drive shaft 16 can be increased proportionally to the flow rate of the water So that the effect of improving the power generation efficiency of the small hydroelectric power generation apparatus is exhibited.

In addition, since a plurality of guide curved panels 12b are provided to allow the water to be rotated at the boundary between the upper case 14 and the lower case 12 to be rotated in a whirling manner and moved downward, So that it can be lowered toward the lower case 12 side.

An exhaust pipe 14c for exhausting air to be filled in the upper case 14 is provided on the upper surface of the upper case 14 and an exhaust valve 14d is provided to the exhaust pipe 14c. The air to be filled is discharged through the exhaust pipe 14c so that the pressure inside the upper case 14 is lowered and the inflow of water through the inflow pipe 14a can be more effectively performed.

Since the guide pipe 14b is provided in the inflow pipe 14a so that the supplied water is uniformly distributed in the upper case 14 and supplied to the inflow pipe 14a, water supplied adjacent to the blade 30 is guided toward the blade 30 The water supplied to the blade 30 from the blade 30 is guided to the inside of the upper case 14 so that a pressing force can be applied to the blade 30 disposed in the upper case 14 at the same time.

The guide panel 14b disposed adjacent to the blade 30 is formed relatively short in the inlet pipe 14a and the guide panel 14b disposed at a position distant from the blade 30 is formed relatively long, A part of the water supplied through the guide tube 14a presses the blade 30 disposed adjacent to the inlet tube 14a and the water in the remaining portion flows into the upper case 14 along the guide panel 14b And thereafter, the blade 30 disposed rearward is pressed.

As described above, since the water supplied through the inlet pipe 14a is dispersed and rotational motion is performed while simultaneously applying a pressing force to the plurality of blades 30, the rotational force generated on the driving shaft 16 is increased, It is possible to prevent the pressing force from being concentrated on any one of the blades 30 to be pressed so that the connecting portion of the blade 30 is deformed or broken.

The present embodiment further includes a flow control unit 70 for controlling the flow rate of water passing through the upper case 14 and the lower case 12 through the inflow pipe 14a and the discharge pipe 12a, When the flow rate of the water supplied through the channel 14a is larger than necessary, the flow rate regulator 70 can be operated to reduce the supply amount of water.

When the amount of rotation of the drive shaft 16 is smaller than the amount of water supplied, the amount of water drained through the discharge pipe 12a is reduced to slightly increase the time during which the water is rotated inside the upper case 14, It is possible to increase the amount of rotation of the motor.

The flow rate regulator 70 includes a first valve 72 for varying the position of the first shutoff panel 72b that is rotatably installed in the inlet pipe 14a and controlling the flow rate of the incoming water, And a second valve (74) for varying the position of a second blocking panel (74b) rotatably mounted on the first block (74) and regulating the flow rate of the water to be discharged.

Therefore, the operator can operate the first valve 72 or the second valve 74 to adjust the amount of water supplied and the amount of water discharged.

The first valve 72 has a first valve shaft 72c rotatably installed on a first extension pipe 72a extending outside the inflow pipe 14a and connected to the first valve shaft 72c to be connected to the inflow pipe A first lever 72d connected to the first valve shaft 72c and extending in the lateral direction of the inlet pipe 14a and a second lever 72b connected to the first lever 72a, And a first restraining lever 72e which is operatively installed in the first interrupter panel 72d and restrains the first lever 72d and restrains the rotational motion of the first intercepting panel 72b.

When the worker adjusts the amount of opening of the inflow pipe 14a, the first restraining lever 72e and the first lever 72d are simultaneously held and the first restraining lever 72e, which is disposed in close contact with the first extension pipe 72a, The first driving shaft 16 and the first blocking panel 72b are rotated to adjust the amount of opening of the inflow pipe 14a by rotating the first lever 72d after being disposed apart from the first extension pipe 72a .

The second valve 74 has a second valve shaft 74c rotatably mounted on a second extension pipe 74a extending outwardly of the discharge pipe 12a and connected to the second valve shaft 74c, A second lever 74d connected to the second valve shaft 74c and extending in the lateral direction of the discharge pipe 12a and a second lever 74d connected to the second valve shaft 74c to adjust the opening amount of the second lever 74d, And a second restraining lever 74e which restrains the second lever 74d and restrains the rotational motion of the second blocking panel 74b.

When the worker adjusts the opening amount of the discharge pipe 12a, the second restraining lever 74e and the second lever 74d are simultaneously held, and the second restraining lever 74e, which is disposed in close contact with the second extension pipe 74a, The second driving shaft 16 and the second blocking panel 74b are rotated to adjust the opening amount of the discharge pipe 12a when the second lever 74d is rotated after being disposed apart from the extension pipe 74a.

The operation of the small hydropower generator including the aerator blades according to an embodiment of the present invention will now be described.

First, a base plate 10 is installed on an inclined terrain such as a river or a waterfall through which water flows, and a small hydroelectric power generator composed of a lower case 12 and an upper case 14 is installed, and flowing water flows through an inflow pipe 14a And is supplied into the upper case 14.

At this time, a part of the water is directly contacted to the blade 30 by the plurality of guide panels 14b, and the rest is moved to the inside of the upper case 14 by the guide panel 14b, So that the blade 30 is rotated while being brought into contact with the blade 30 disposed inside the upper case 14.

The water supplied through the inlet pipe 14a is uniformly dispersed in the upper case 14 and uniformly contacts the plurality of blades 30 to rotate the blades 30. By rotating the blades 30, Electric energy is supplied from the generator 18 while the electric motor 16 is rotated.

The pressing force of water is transmitted to the pressing surface portion 34 of the blade 30 so that the blade 30 rotates around the driving shaft 16. At this time, the protruding curved surface portion 36 provided on the back surface of the pressing surface portion 34 And the projecting ribs 38 to minimize the interference of the fluid with the rotational motion of the blade 30. [

At the beginning of the rotation of the blade 30 by the pressing force of water, the protruding rib 38 passes through the interface of the fluid filled in the upper case 14, wherein the protruding rib 38 passing through the interface of the fluid The fluid is introduced into the refraction preventing groove portion 38b formed at the end portion thereof and then slides along the curved surface and is discharged to the outside so that the end surface of the fluid and the end of the protruding rib 38 collide with each other and the protruding rib 38 is refracted toward one side or the other side .

As described above, when the blade 30 is rotated, the drive shaft 16 is rotated, so that the electric energy is supplied from the generator 18, and the water rotated by the blade 30 flows between the upper case 14 and the lower case 12 And is then discharged through the discharge tube 12a formed at the lower portion of the lower case 12. The discharge tube 12a is connected to the lower case 12 through the discharge tube 12a.

When the flow rate of the water supplied through the inflow pipe 14a is larger than necessary, the operator simultaneously holds the first lever 72d and the first restraining lever 72e and performs the first block 72c around the first valve axis 72c The degree of opening of the inflow pipe 14a can be adjusted by adjusting the opening amount while rotating the panel 72b.

When the flow rate supplied through the inlet pipe 14a is smaller than a predetermined value, the operator holds the second lever 74d and the second restraining lever 74e at the same time and moves the second valve shaft 74c around the second The opening degree of the discharge pipe 12a can be adjusted by adjusting the amount of opening while rotating the blocking panel 74b and the time for the water to rotate inside the upper case 14 is increased by adjusting the opening degree of the discharge pipe 12a The amount of rotation of the blade 30 and the drive shaft 16 can be increased.

As a result, it is used in a hydropower generator or a small hydropower generator, and the flowing water is dewatered to one side of the blade to convert the linear motion of the water into rotational motion of the blade, reduce the friction between the rotating blade and the fluid, Which is capable of preventing the blade from being deflected, and a small-hydro-electric power generating device having the blade.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . In addition, although the water blasting blade and the small hydro-power generation device having the water blasting blade have been taken as an example, the present invention is merely an example, and the blade of the present invention and the power generation device Can be used. Accordingly, the true scope of the present invention should be determined by the following claims.

10: base plate 12: lower case
12a; Outlet tube 12b: guide curved surface panel
14: upper case 14a: inlet pipe
14b: Guide panel 14c: Exhaust pipe
14d: exhaust valve 16: drive shaft
18: generator 30: blade
30a: drive panel 32: engaging hole portion
32a: fastening hole portion 34: pressing curved surface portion
36: projecting curved surface portion 38: projecting rib
38a: an inclined surface 38b: a refraction preventing groove
70: Flow control unit 72: First valve
72a: first extension pipe 72b: first blocking panel
72c: first valve shaft 72d: first lever
72e: first restraining lever 74: second valve
74a: second extension pipe 74b: second blocking panel
74c: second valve shaft 74d: second lever
74e: second restraining lever

Claims (4)

delete delete A pressing surface portion provided on one surface of the blade and pressed by flowing water; And
And a protruding curved surface portion provided on a back surface of the pressing curved surface portion to prevent interference with the fluid that is in contact with the blade by sliding the fluid to one side and the other side,
Wherein the protruding curved portion is formed with a protruding rib having an inclined surface on which the fluid slides,
Further comprising a refraction preventing portion that prevents refraction of the protruding rib by a fluid boundary surface when the protruding rib passes through the interface of the fluid. The method of claim 3,
Wherein the refraction preventing portion includes a refraction preventing groove formed in the protruding rib so that the fluid is discharged when the protruding rib passes through the interface of the fluid.

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