KR101387141B1 - Cross-flow turbine - Google Patents

Abstract

In accordance with the present invention, the present invention achieves high-efficiency development with a small capacity corresponding to a small flow of water during the dry season, while maintaining a high-efficiency development even during the high-season period. The present invention relates to a frame that is fixedly installed in a horizontal direction on an upper side of a step surface between an upper flow passage and a lower flow passage having an upper and lower height difference, and the water flowing from the upper flow passage flows toward the opened front and then flows out through the opened rear and downwards. And a transverse flow fan which is rotatably installed in the left and right width directions in the inside of the frame, and rotates with the free fall of the water transferred from the upper flow path, and a flat plate shape fixedly installed in the left and right width directions within the frame. Water transferred from the upper flow path is directed to the radially upper end of the crossflow fan. A front guide for guiding the front guide, and fixedly installed in the left and right width directions so as to be positioned at a rear outer side of the crossflow fan, and facing the crossflow fan to guide water transferred through the crossflow fan to the lower side of the frame. A certain curvature is formed on the inner surface, and the water passing over the top includes a rear guide that guides to the rear of the frame.

Description

Crossflow Aberration {CROSS-FLOW TURBINE}

The present invention relates to cross flow aberration among impulse aberrations, which obtains energy by impinging the kinetic energy of a water flow on a cross flow fan.

Generally, a generator is a device that converts mechanical energy into electrical energy. The generator includes a body, a rotor mounted rotatably on the body, a rotating shaft rotating by an external force, and a plurality of coils wound around the rotating shaft, wherein the rotor is provided on the outside of the rotor, And a stator made of a magnet fixedly mounted inside.

When the rotation shaft is rotated by an external force, a coil coupled to the rotation shaft rotates, and a current through an electromotive force flows into the coil due to a magnetic field generated in the magnet. These generators are classified into hydraulic power, thermal power, wind power and nuclear power depending on the power source for rotating the rotary shaft.

In particular, a hydroelectric generator mainly rotates the rotary shaft using a drop of water, and a device for rotating the rotary shaft is called a turbine. In other words, it is a device for producing electric power by rotating the rotary shaft of the generator through the aberration using water drops.

These aberrations can be largely classified into two types: reaction and impulse type, and the reaction type is energy type obtained from the pressure difference between water before and after the aberration. Tubular and the like. On the other hand, the impulse type is a type that obtains energy by impinging the kinetic energy of the water flow to the turbine, and is suitable for the conditions with a small flow rate but a large level difference, such as a pelton type, a riding type and a cross flow type.

Cross-flow aberration, or cross-flow aberration, is an aberration that generates power by using the velocity head of water. The cross-flow aberration refers to an aberration obtained by impacting the crossflow fan using the velocity energy of water to obtain rotational force. The cross flow aberration is a structure in which water enters the center of the shaft in the cross flow fan and then goes out in the radial direction again. In the 'counterflow aberration' of the US patent US4579506 of Osberg, the water flows at right angles to the main axis of the cylindrical crossflow fan and falls downward after perfusion of the crossflow fan. At this time, power is generated by the rotation of the crossflow fan.

In addition, a cross flow fan is installed in the water channel, such as the cross flow aberration of US Pat. No. 4,229,26969 and the Korean Patent Application Publication No. 10-2012-0110270, and water flows through a plurality of guide vanes or casings in the water channel. It is used to guide the radial direction of the cross flow fan to generate power by the rotation of the cross flow fan.

In general, the characteristics of cross flow aberration are low to medium drop, low use flow rate, and small efficiency drop even at partial load, so it is more economical than other aberrations, and its structure is simple and easy to repair. Therefore, these cross-flow aberrations are used for the hydrophobic force by being installed in the channel and the upstream side of the channel or river.

However, in Korea, in the spring, autumn, and winter, there is no water in the dry season, and in summer, the water is plentiful. However, during the summer feng shui season, the water is abundant, so it becomes rainy during heavy rains and floods when the water overflows.

In this situation in Korea, it is almost impossible to use a cross flow aberration that requires continuous flow of water at a constant flow rate according to the above-described prior art. Because the flow of water flowing in a small amount during the dry season must be collected and sent in a large amount in the channel, and during the feng shui season, too much water blocks the channel, reducing the efficiency and overflowing the water, which only increases the cost of constructing the waterproof wall. to be.

However, if a low flow rate is used as a low to medium drop, the efficiency is high, and the structure is simple, the cross flow aberration, which is easy to repair, is installed in a form suitable for the situation of Korea, and there will be no proper aberration as the cross flow aberration.

The object of the present invention devised in the above-described aspect, while maintaining the high-efficiency development even in the season of high-efficiency while maintaining a high-efficiency development in the small capacity according to the situation of the water and the small flow of water in accordance with the situation of our country To provide cross-flow aberrations that can overflow downstream.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to achieve the above object, the cross flow aberration according to the present invention is fixedly installed in the left and right width directions on the upper side of the step surface between the upper flow path and the lower flow path having a vertical height difference, and the water flowing from the upper flow path opens to the front. A frame flowing out after being introduced through the rear and the bottom of the frame and flowing out; and a cross flow fan rotatably installed in the frame with a left and right width direction as a center of rotation, and rotating with a drop of water transferred from the upper flow passage, and the frame. A flat plate shape fixed to the left and right in the width direction, the front guide guiding the water transferred from the upper flow path toward the radial upper end of the cross flow fan, and the inside of the frame to be located at the rear outer side of the cross flow fan. It is fixed in the right and left width direction, and the water transferred through the crossflow fan to the lower side of the frame A certain curvature is formed on the inner surface facing the crossflow fan to guide, and the water passing over the upper end includes a rear guide to guide the rear of the frame.

In addition, the crossflow fan, the height of the upper end in the radial direction is installed at a position lower than the height of the bottom surface of the upper flow path, the front guide, the front end is starting from the bottom surface of the upper flow path and the rear end of the crossflow fan It extends inclined to a radial upper end, the rear guide is characterized in that the height of the upper end is formed lower than the bottom surface of the upper flow path.

The apparatus may further include an inlet tube extending from the front surface of the frame toward the upper flow path, and a plate-shaped filter member disposed on the inlet tube in a horizontal width direction and filtering foreign matter to water flowing from the upper flow path. It is done.

The apparatus may further include an overflow guide extending from the rear surface of the frame in the downstream direction of the lower flow path.

The cross flow aberration according to the present invention is a cross-flow fan rotatably installed in a frame installed on a step surface between an upper flow path and a lower flow path having a vertical height difference, and velocity energy and potential energy of water guided through a proton guide and a rear guide. Can be used together to achieve high efficiency power generation.

Particularly, in accordance with the situation in Korea, the small water flow during the dry season achieves high-efficiency development with small capacity, while maintaining the high-efficiency development during the feng shui season, and the unnecessary flow of water overflows the top of the rear guide downstream. It is possible to eliminate the water-proof wall construction required for the installation of the conventional cross-flow aberration, which is economical.

1 is a side sectional view showing a first embodiment of the cross flow aberration according to the present invention;
Figure 2 is a side cross-sectional view showing the operation during the dry season in the embodiment of Figure 1,
Figure 3 is a side cross-sectional view showing the operation of the feng shui season in the embodiment of Figure 1,
4 is a perspective view showing a state in which a generator is installed in the embodiment of FIG.
5 is a cross-sectional perspective view taken along the line AA ′ of the embodiment of FIG. 4;
Fig. 6 is a side sectional view showing a second embodiment of cross flow aberration according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the cross flow aberration according to the present invention.

Cross flow aberration according to the present invention comprises a frame 100, cross flow fan 200, the front guide 300 and the rear guide 400 as shown in Figures 1 to 5. In addition, as shown in FIG. 6, the inlet tube 500, the filter member 600, and the overflow guide 700 may be further included. If necessary, the support S may be installed.

First, the cross flow aberration according to the present invention is different from the conventional cross flow aberration installed in the passage or the conduit, as shown in Figures 1 to 6, the upper passage 10 and the lower passage 20 having a difference in height It is installed on the stepped surface 30 between.

That is, the frame 100 as a skeleton forming the cross flow aberration of the present invention in the left and right width direction on the stepped surface 30 between the upper passage 10 and the lower passage 20 having a difference in the vertical height as shown in FIG. It is fixedly installed, and the water flowing from the upper flow path 10 flows in the open front and then flows out through the open rear and the bottom. The upper side of the frame 100 may be open as shown in FIGS. 4 and 5, but may be closed so that foreign matters and the like do not flow from the upper side. The frame 100 is to be firmly installed in the left and right width direction, when the size of the various components to be described later to increase the weight, as shown in Figure 6 the pillar or rod support on the lower portion of the frame 100 (S) may be supported and fixed from the bottom surface of the lower flow path (20).

1 to 5, the cross flow fan 200 is rotatably installed in the inside of the frame 100 with the left and right width directions as the center of rotation, and rotates as a drop of water transferred from the upper flow path 10. . The number of feathers of the cross flow fan 200 is 20 to 30 sheets, and the number of feathers is adjusted in consideration of the ease of welding and the efficiency according to the rated capacity according to the outer diameter of the cross flow fan. However, in the case of cross flow aberration, it is classified as impulse aberration, but in the present invention, since it has a significant influence on performance characteristics according to the pressure and speed around the cross flow fan 200, it has the characteristics of impulse aberration and reaction aberration at the same time.

The front guide 300 is a flat plate shape fixed in the left and right width direction of the frame 100, as shown in Figures 1 to 5, the water transferred from the upper passage 10 in the radial direction of the cross flow fan 200 Guide it face up. Since the cross flow fan 200 is rotatably installed in the frame 100, the cross flow fan 200 is positioned above the step surface 30 between the upper flow path 10 and the lower flow path 20. Therefore, the water transferred from the upper flow path 10 may be introduced at an angle of incidence to facilitate the rotation of the cross flow fan 200. Therefore, the water transferred from the upper flow path 10 through the front guide 300 may pass through the cross flow fan ( It is guided toward the radially upper end of the 200 so that the cross flow fan 200 can be efficiently rotated.

1 and 5, the rear guide 400 is fixedly installed in the left and right width directions inside the frame 100 so as to be positioned at the rear outer side of the cross flow fan 200, and passes through the cross flow fan 200. A certain curvature is formed on the inner side facing the crossflow fan 200 to guide the transferred water to the lower side of the frame 100, the water over the top guides the rear of the frame 100. The cross flow fan 200 rotates the cross flow fan 200 efficiently by riding the feather of the cross flow fan 200 after water is incident on the upper end in the radial direction through the front guide 300. At this time, if the transferred water hits the radial upper end of the cross flow fan 200 and is mostly discharged to the rear of the frame 100, the potential energy of the water due to the height difference between the upper flow path 10 and the cross flow fan 200 may be secured. I will not be able to. Therefore, at least water transferred from the upper flow path 10 through the front guide 300 hits the radial upper end of the cross flow fan 200 to secure the velocity energy of the water, and at the same time, the potential energy of the water is also the rotational force of the cross flow fan 200. The rear guide 400 performs the function so that it can be added to.

That is, the rear guide 400 is located at the rear outer side of the crossflow fan 200 and a certain curvature is formed on the inner side facing the crossflow fan 200 so that the water transferred through the crossflow fan 200 is transferred to the crossflow fan 200. And guided between the inner surface and to flow out of the frame 100. Accordingly, the water guided through the front guide 300 is incident to the radial upper end of the first cross flow fan 200 to secure the speed energy, and secondly, the cross flow fan 200 riding on the inner curvature of the rear guide 400. ) By adding rotational force to potential energy. The inner surface curvature shape of the rear guide 400 is formed to become narrower from the radial upper end of the cross flow fan 200 to the radial rear end of the cross flow fan 200 to increase the flow rate of the water to be transported.

The crossflow fan 200 recovers velocity energy and potential energy of water flowing from the upper flow passage 10 having the difference in the vertical height from the upper flow passage 10 and the lower flow passage 20 through the front guide 300 and the rear guide 400 as efficiently as possible. In this case, the rotational force of the crossflow fan 200 transmits the rotational force to the generator G through the power transmission means and generates power as shown in FIG. 4. This is to rotate the cross-flow fan 200 using a small amount of water as efficiently as possible because the small amount of water flows from the upper flow path 10 to the lower flow path 20 when the dry season as shown in FIG.

In addition, as shown in FIG. 3, the rear guide 400 is guided from the front guide 300, and the water transferred through the crossflow fan 200 guides the lower side of the frame 100 along an inner side thereof. Water passing over the top of the guide 400 is another feature to guide the rear of the frame 100. This is because, unlike the low season in FIG. 2, since the large amount of water flows from the upper flow passage 10 to the lower flow passage 20 in FIG. 3, only the water used for efficient rotation of the cross flow fan 200 of the rear guide 400 The water that is guided to the inner side and the other side of the rear guide 400 is guided to the rear of the frame 100 to overflow (over-flow). Accordingly, the cross flow aberration according to the present invention can achieve a constant and continuous development of the generator (G) by rotating the cross flow fan 200 as efficiently as possible during the low water season as well as during the high water season. A large amount of water is not blocked and flooded, and overflows eliminate the need for a separate bulkhead.

The cross-flow fan 200, the front guide 300 and the rear guide 400 can achieve power generation through efficient rotation, but the energy recovery of the water transported according to the position installed in the frame 100 of each component Differences can occur. For example, in order to maximize the velocity energy of the water, it is preferable that the radial upper end of the cross flow fan 200 be formed slightly higher than the bottom surface of the upper flow passage 10, while the potential energy of the water should be so much damaged. Accordingly, in order to secure the velocity energy and the potential energy of the water as efficiently as possible, as shown in FIGS. 1 to 5, the crossflow fan 200 has a lower radial height than the height of the bottom surface of the upper flow path 10. The front guide 300 has a front end starting from the bottom surface of the upper flow path 10, the rear end is inclined to the radially upper end of the crossflow fan 200, the rear guide 400 is The height of the upper end is made lower than the bottom surface of the upper passage (10). Through this, the water transported from the upper flow path 10 is incident on the radially upper end of the cross flow fan 200 through the front guide 300 without loss of velocity energy, and the cross flow fan (rather than the height of the bottom surface of the upper flow path 10) Since the height of the radial upper end of the 200 is low, the potential energy of the water can be secured more by the difference. In addition, if the top height of the rear guide 400 is higher than the height of the bottom surface of the upper flow path 10, a larger amount of water will be guided to the lower side of the frame 100, but the water over the top of the rear guide 400 As the flow becomes irregular, cavitation and vortices are likely to occur. Therefore, the top height of the rear guide 400 may be lower than the height of the bottom surface of the upper flow path 10 to enable the normal flow of water that rides over the top of the rear guide 400.

On the other hand, it is more preferable that the foreign material, such as broken wood or stone, is removed in the interior of the water to be transported while drawing the flow of water transported through the front of the frame 100 to the maximum normal flow. To this end, as shown in FIG. 6, an inlet tube 500 extending from the front surface of the frame 100 in the upper flow path 10 and installed in the left and right width directions on the inlet tube 500 and the upper portion It may further include a plate-shaped filter member 600 for filtering foreign matter to the water flowing from the flow path (10). The filter member 600 is a plate-like member having a lattice shape inside, and may form a gap of the lattice in accordance with the foreign matter being pushed together with the water to be transported. At this time, the water passing through the grid of the filter member 600, as well as the removal of foreign matter, and the irregular flow while passing through the grid can lead to a flow like a normal flow calmly.

Meanwhile, as shown in FIG. 3, a large amount of water from the upper flow passage 10 during the feng shui season is partially passed through the inner surface of the front guide 300 and the rear guide 400 through the frame 100. Rotating the 200, and the water beyond the top of the rear guide 400 is guided to the rear of the frame 100 to fall to the lower flow path (20). The water that rotates the cross flow fan 200 through the inner surface of the rear guide 400 falls down the frame 100 and falls to the lower flow path 20. The frame 100 is crossed over the top of the rear guide 400. Water falling down the frame 100 by the water falling to the rear of the) does not flow in the downstream direction of the lower flow path 20 may be filled with water below the frame 100, which is a cross flow fan ( 200) may interfere with the rotation. In order to prevent this, as illustrated in FIG. 6, an overflow guide 700 extending from the rear surface of the frame 100 in the downstream direction of the lower flow path 200 may be further included. That is, water falling over the top of the rear guide 400 to the rear of the frame 100 extends in the downstream direction of the lower flow path 200 as much as possible along the overflow guide 700, and at the same time the frame Water falling downward of the 100 may ensure sufficient space below the frame 100, as well as guide the mixture to flow with the water flowing along the overflow guide 700.

As described above, the cross-flow aberration according to the present invention includes a cross-flow fan rotatably installed in the frame 100 installed on the step surface 30 between the upper flow passage 10 and the lower flow passage 20 having a vertical height difference ( 200) by using the velocity energy and the potential energy of the water guided through the proton guide 300 and the rear guide 400 can achieve high efficiency power generation.

Particularly, in accordance with the situation in Korea, the small water flow at the time of going to the small capacity to meet the high efficiency, while maintaining the high-efficiency development during the feng shui, the unnecessary flow of water to the downstream beyond the top of the rear guide 400 It is possible to overflow, and it is economical because it is possible to exclude the waterproofing wall construction required for the installation of the conventional cross flow aberration.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

10: upper flow path
20: lower flow path
30: step surface
100: frame
200: cross flow fan
300: Front Guide
400: rear guide
500: Inlet Tube
600 filter element
700: overflow guide
G: generator
S: Support

Claims (4)

A frame fixedly installed in an upper and lower width direction on an upper side of a step surface between an upper flow passage and a lower flow passage having an upper and lower height difference, wherein water flowing from the upper flow passage flows in an open front and then flows out through an open rear and downward;
A cross-flow fan rotatably installed in the frame in a left-right width direction as a center of rotation, and rotating with a drop of water transferred from the upper flow path;
A front guide having a flat plate shape fixed to the inside of the frame in a horizontal direction and for guiding water transferred from the upper flow path toward a radial upper end of the cross flow fan;
It is fixed to the inside of the frame in a horizontal direction so as to be located at the rear outer side of the crossflow fan, a predetermined curvature is formed on the inner side facing the crossflow fan to guide the water transferred through the crossflow fan to the lower side of the frame. The water over the top includes a rear guide to guide the rear of the frame,
The inner surface curvature shape of the rear guide,
Cross flow aberrations characterized in that the closer to the radially rear end of the cross flow fan in a state spaced from the radial upper end of the cross flow fan.
The method of claim 1,
The cross flow fan,
The height of the radial upper end is installed at a position lower than the height of the bottom surface of the upper flow path,
The front guide,
The front end extends from the bottom surface of the upper flow path and the rear end is inclined to the radial upper end of the crossflow fan,
The rear guide,
Cross flow aberration, characterized in that the height of the top is formed lower than the bottom surface of the upper passage.
The method of claim 1,
An inlet tube extending from the front surface of the frame toward the upper flow path,
Cross flow aberration, characterized in that further provided on the inlet tube in the horizontal direction, the plate-shaped filter member for filtering foreign matter to the water flowing from the upper flow passage.
4. The method according to any one of claims 1 to 3,
Cross flow aberration further comprises an overflow guide extending in the downstream direction from the rear surface of the frame to the lower flow path.

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