WO2019206103A1

WO2019206103A1 - Water flow power generation apparatus

Info

Publication number: WO2019206103A1
Application number: PCT/CN2019/083750
Authority: WO
Inventors: 王武生
Original assignee: Wang Wusheng
Priority date: 2018-04-24
Filing date: 2019-04-22
Publication date: 2019-10-31
Also published as: CN110397544A

Abstract

A water flow power generation apparatus, comprising an impeller (1) and an impeller shaft (2), the impeller (1) comprising blades (3). A flow-shielding cover (4) is arranged at the outside of blades (3A) rotating in the opposite direction to that of a water flow (5), the blades (3A) being separated from the water flow (5) by the flow-shielding cover (4), so that the blades (3A) rotating in the opposite direction to that of the water flow (5) are not subject to the reverse force of the water flow (5), thereby reducing the reverse resistance of the water flow (5), and increasing the water energy utilisation rate.

Description

Water flow power generation device

Technical field

The present invention relates to a streamline power generation technology, and more particularly to a streamline power generation device.

Background technique

As we all know, water resources are valuable clean and renewable resources, and can be used as a long-term means to solve energy constraints. As water and power generation will not cause problems such as resettlement, ecological environment and huge investment caused by the construction of reservoirs, Streaming power generation has received unprecedented attention. However, the current principle of flow generation is mainly to use the kinetic energy of the powerful water flow generated by the water level difference to drive the turbine to drive the generator set to generate electricity. At present, the propeller blades are basically used for hydroelectric power generation. For example, the United States installs a propeller power of 70 meters in diameter in the water, and uses the water flow to propel the propeller to rotate and drive the generator to generate electricity. However, such a propeller rotation power generation method has the disadvantage of high manufacturing cost, in particular, the blade line has a high linear velocity, a large resistance, and a low water energy conversion rate. For example, a propeller with a diameter of 70 m and a rotational speed of 10 r/m is used: the edge speed of the blade reaches 36.6 m/s, which is equivalent to a water resistance of 121 km/h. The presence of such water resistance greatly consumes the kinetic energy of the water flow itself, resulting in a reduction in power generation. Why not use impellers to generate electricity? Because when the impeller rotates under the hydraulic force, the rotation direction of the upper blade and the lower blade of the axle is opposite, the opposite rotation will cancel the driving force, resulting in high energy consumption, low power generation efficiency, high power generation cost, and no Practical value.

Summary of the invention

In view of the above problems and needs in the prior art, an object of the present invention is to provide a water-flow power generation device that realizes high-quality water-flow power generation with low cost, low energy consumption, and high efficiency, thereby promoting large-scale application of flow water resources.

To achieve the above object, the present invention adopts the following technical solutions:

A flow generation device includes an impeller and an impeller shaft, the impeller including a vane, wherein a shroud is disposed outside the vane in a direction opposite to the direction of flow in the direction of rotation.

The invention installs the baffle outside the blade opposite to the flowing direction, and isolates the reverse impact force of the flowing water to the blade through the baffle, so that the blade whose rotating direction is opposite to the flowing direction is no longer reversed by the flowing water. Therefore, the reverse resistance of the flowing water can be greatly reduced, and the utilization rate of the water energy can be improved.

Preferably, the obturator is capable of adjusting the amount of water flowing according to the rotation of the flow direction along the impeller axis. Because the direction of the flow is constantly changing, it can be adapted to the change in direction of flow by rotation, especially when the axis of the impeller is perpendicular to the horizontal. At the same time, the rotation of the hood can also achieve the effect of adjusting the size of the flowing water. By adjusting the size of the flowing water, the relative stability of the flowing water can be maintained and the quality of the electric energy can be improved.

Preferably, the opening and closing door is provided on the obstruction cover. The opening and closing of the opening and closing door can adjust the flow of water, thereby maintaining a relatively stable flow of water and ensuring the quality of the generated energy.

Preferably, the vanes are curved vanes. More water energy is available when the curved vanes are opposite to the direction of flow.

As a further preferred solution, baffles are provided at both ends of the curved blade. A baffle is arranged at both ends of the curved blade to lock the running water at both ends, thereby improving the utilization of water energy.

As a further preferred solution, a transmission wheel is disposed on the baffle, and the transmission wheel is coupled to the generator.

As a further preferred solution, the curved blade is provided with at least one partitioning plate, so that the curved blade is divided into a plurality of segments. Through the blocking function of the partition plate, the running water can be locked in the isolation zone to prevent the water from spreading and improve the utilization efficiency of the water energy.

As a further preferred solution, at least one output wheel is mounted on the impeller shaft, the output wheel having a clutching function. The size of the flowing water is constantly changing. By installing one or more power transmission wheels on the impeller shaft, when the running water becomes small, some of the power transmission wheels are separated by the clutch connection function, thereby reducing the power generation load and ensuring the power generation quality; Similarly, when the running water becomes large, the power transmission wheels are connected to increase the power generation load, thereby fully utilizing the water power generation and ensuring the power generation quality.

Preferably, the flow generating device further comprises a U-shaped beam trough, and the impeller is located in the U-shaped beam trough. The flow of water through the beam trough prevents the flow of water from propagating in other directions when the blade is pushed, so that the power of the flow is limited to the direction of rotation of the impeller, thereby further improving the utilization efficiency of the water energy.

Preferably, a guide shroud is disposed at a front end of the impeller, and the diameter of the shroud is reduced from large to large, with a large diameter at the water inlet and a small diameter at the front end of the impeller. Through the diversion of the shroud, more water is introduced into the flow generator, thereby improving the working efficiency of the flow generator. For example, the inlet of the impeller is 5m×20m. Now the size of the inlet of the shroud is 15m×20m through the function of the shroud. The width is the same as the original, but the height is three times the original; The outlet of the flow hood is still 5 m × 20 m, which is the same as the inlet of the impeller and is connected to it. Through the diversion of the shroud, the 15 m × 20 m flow water is introduced to 5 m × 20 m, and the water intake is increased by three times, thereby greatly improving the water energy.

As a further preferred solution, an opening and closing door is provided on the shroud. Through the opening or closing action of the opening and closing door, the amount of water inflow can be continuously adjusted, so that the amount of water flowing is relatively stable, thereby ensuring the quality of power generation.

As a further preferred solution, the rear end of the shroud is integrally connected with the front end of the U-shaped beam trough. This connection ensures that the two are combined into one, which increases the ease of installation and reduces manufacturing costs.

Preferably, a flow direction adjustment shaft is vertically disposed in a middle portion of the impeller shaft, and the flow direction adjustment shaft can automatically adjust the impeller shaft to be perpendicular to the flow direction according to the change of the flow direction, thereby improving the flow generation efficiency.

Preferably, a guide rudder is provided on the impeller or on the impeller shaft or on the flow direction adjustment shaft. Once the direction of flow changes, the guide rudder will adjust the direction of the blade to be perpendicular to the direction of flow under the action of flowing water, thereby improving the efficiency of flow generation.

Compared with the prior art, the present invention has the following beneficial effects:

The invention installs the baffle outside the blade opposite to the flowing direction, and isolates the blade from the flowing water through the shroud, so that the blade whose rotating direction is opposite to the flowing direction is no longer subjected to the reverse force of the flowing water, and thus can be greatly Reduce the reverse resistance of the flowing water, improve the utilization of water energy, and realize the flow generation. After calculation, the power generation efficiency can be at least doubled compared with the existing propeller power generation; especially, when the shroud is installed at the front end of the impeller Through the cooperation of the shroud and the shroud, not only the flow water can be stabilized, but also high-quality electric energy can be obtained, and the water energy utilization rate can be increased to more than twice as much as the existing one; therefore, the invention can be low-cost, Low-energy, high-efficiency, high-quality, streamlined power generation is of great value in promoting the large-scale application of water resources.

DRAWINGS

1 is a schematic structural view of a flow generation device provided in Embodiment 1;

2 is a schematic structural view of a flow generation device provided in Embodiment 2;

3 is a schematic structural view of a blade provided in Embodiment 3;

4 is a schematic structural view of a water-flow power generation device provided in Embodiment 4;

FIG. 5 is a schematic structural diagram of a flow generation device according to Embodiment 5; FIG.

FIG. 6 is a schematic structural view of a water-flow power generation device according to Embodiment 6.

In the figure: 1, the impeller; 2, the impeller shaft; 3, the blade; 3A, the blade covered by the hood; 3B, the blade not covered by the hood; 4, the hood; 5, running water; 6, static water flow; 7, baffle; 8, partition plate; 9, horizontal plane; 10, flow direction adjustment axis; 11, plane bearing; 12, guide rudder; 13, shroud; 14, U-shaped beam trough .

detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the embodiments and the accompanying drawings:

Example 1

As shown in FIG. 1 , a flow generation device according to the present embodiment includes an impeller 1 and an impeller shaft 2, and the impeller 1 includes a blade 3, which is characterized in that: a blade 3 is provided outside the blade 3A whose rotation direction is opposite to the direction of flow. Shroud 4.

Referring to Fig. 1, when the flowing water 5 is rushed toward the impeller 1, since the shroud 4 is provided outside the vane 3A opposite to the flowing direction in the rotating direction, the vane 3A covered by the obstructing shroud 4 is not subject to running water. The blade 3, which is not blocked by the hood 4, is subjected to the flow of water to rotate in the same direction as the flow direction, so that the direction of rotation of the blade 3A located in the hood 4 is opposite to the direction of the flow, and only during the rotation Due to the blocking action of the static flowing water 6 in the hood, since the water velocity in the static flowing water 6 is zero, the water resistance of the blade 3A whose rotation direction is opposite to the flowing direction can be significantly reduced relative to the prior art, so that the water can be The energy consumption is significantly reduced, which can significantly improve the utilization of water energy.

Example 2

As shown in FIG. 2, the flowing water power generating device provided in this embodiment is different from the flowing water power generating device provided in Embodiment 1 in that the blade 3 is a curved blade, and the blade is not covered by the shielding cover 4. The arcuate groove of 3B is provided for the running water, and the arcuate groove of the blade 3A covered by the hood 4 is provided by the backflow water, so that the blade 3B not covered by the hood 4 can be opposed The straight blade can receive a larger flow of water, and the blade 3A covered by the hood 4 is less resistant, so that the water energy loss is smaller, and the utilization of water energy can be further improved than in the first embodiment.

Example 3

As shown in FIG. 3, the flow generation device provided in this embodiment is different from the second embodiment in that a baffle 7 is disposed at both ends of the curved blade 3, and a plurality of baffles are provided between the two baffles. A block (three blocks are shown in Fig. 3) is divided into panels 8, which are divided into four sections, each of which has only a quarter of the original space. When the flowing water rushes toward the curved blade 3, not only the baffle 7 but also the running water at both ends can be locked, and the laterally diffused flowing water is also locked by the action of the partitioning plate 8, thereby implementing In Example 2, this embodiment can further improve the utilization rate of water energy.

Example 4

As shown in FIG. 4, the flow generating device provided in this embodiment is different from the third embodiment in that a planar bearing 11 is disposed at a lower end of the flow direction adjusting shaft 10 vertically fixed to the horizontal surface 9, and two of the planar bearings 11 are provided. An impeller 1 is disposed laterally symmetrically, and a baffle 7 is disposed at both ends of the vane 3 of the impeller 1, and a plurality of (three blocks are shown in FIG. 4) partition plates 8 are disposed between the two baffles, The blades 3 are each divided into four segments; a guide rudder 12 is disposed below the planar bearing 11, and the guide rudder 12 is perpendicular to the blade 3, and the guide rudder 12 drives the blade 3 to rotate horizontally in synchronization. When the direction of the flow changes, the guide rudder 12 is rotated by the flow of water, and the blade 3 is also rotated synchronously by the plane bearing 11 during the rotation, so as to always rotate perpendicularly to the direction of the flow to obtain the maximum water energy.

Example 5

As shown in FIG. 5, the flow generation device provided in this embodiment is different from the flow generation device provided in the first embodiment in that a shroud 13 is attached to the front end of the impeller 1, and the shroud 13 is contracted. The shape of the horn is a large diameter at the water inlet, and a small diameter at the front end of the impeller 1. When the flowing water 5 enters the shroud 13, as the area of the shroud 13 is gradually reduced, the water of the flowing water 5 gradually It becomes larger, which can improve the efficiency of flow generation. For example, when the area of the shroud 13 is doubled, the water energy can be doubled, and the power generation efficiency of one flow generator is equivalent to the power generation efficiency of the original two flow generators.

Example 6

As shown in FIG. 6, the flow-through power generation device provided in this embodiment is different from Embodiment 2 in that a U-shaped beam-shaped groove 14 is provided on the outer periphery of the blade 3B not covered by the hood cover 4, and the U-shaped bundle is provided. The open end of the flow channel 14 is the water inlet end, and the U-shaped beam flow groove 14 allows the water flowing toward the blade 3B not covered by the hood 4 to be trapped in the U-shaped beam flow groove 14 to prevent the water from spreading to the periphery. The loss can further improve the utilization of water energy.

Of course, the U-shaped beam trough 14 can be integrated with the shroud 13 (not shown in the figure) for processing and installation, reducing manufacturing costs.

Finally, it is pointed out that the above is only a part of the preferred application examples of the present invention, and is not to be construed as limiting the scope of the present invention. Some non-essential improvements and adjustments made by those skilled in the art according to the above-mentioned contents of the present invention. All fall within the scope of protection of the present invention.

Claims

A flow generation device includes an impeller and an impeller shaft, the impeller including a vane, wherein a shroud is disposed outside the vane in a direction opposite to the direction of flow in the direction of rotation.
A flow generator according to claim 1, wherein said hood is capable of adjusting the amount of water flowing according to the rotation of the direction of the flow along the impeller shaft.
The flow generator according to claim 1, wherein the shutter is provided with an opening and closing door.
A flow generator according to claim 1, wherein said vanes are curved vanes.
A flow generator according to claim 4, wherein a baffle is provided at both ends of the curved blade.
The flow generator according to claim 5, wherein a transmission wheel is disposed on the baffle, and the transmission wheel is coupled to the generator.
A flow generator according to claim 5, wherein said curved vane is provided with at least one partitioning plate such that said curved vanes are divided into a plurality of sections.
The flow generator according to claim 1, wherein at least one output wheel is mounted on the impeller shaft, and the output wheel has a clutch function.
The flow generator according to claim 1, wherein said flow generator further comprises a U-shaped beam trough, and an impeller is located in said U-shaped beam trough.
The flow generator according to claim 9, wherein a flow guide is provided at a front end of the impeller, the diameter of the shroud is greatly reduced, and a large diameter is at the water inlet, and the impeller is The front end is a small diameter.
The flow generator according to claim 10, characterized in that the opening and closing door is provided on the shroud.
The flow generator according to claim 10, wherein the rear end of the shroud is integrally connected to the front end of the U-shaped beam trough.
The flow generator according to claim 1, wherein a flow direction adjustment shaft is vertically disposed in a middle portion of the impeller shaft, and the flow direction adjustment shaft can automatically adjust the impeller shaft to be perpendicular to the flow direction according to the change of the flow direction. .
The flow generator according to claim 13, wherein a guide rudder is provided on the impeller or on the impeller shaft or on the flow direction adjusting shaft.