Horizontal shaft tidal current energy water turbine and using method

A water turbine and tidal current energy technology, which is applied in mechanical equipment, hydroelectric power generation, ocean energy power generation, etc., can solve the problems of not being able to maximize the efficiency, reduce flow separation and energy loss, increase stall angle of attack, and improve boundary The effect of layer separation

Active Publication Date: 2021-10-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, although it can indeed improve the power generation efficiency to a certain extent, the hinged connection between the main wing and the rotatable flaps restricts it to a certain extent, making it impossible to maximize the efficiency.

Method used

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  • Horizontal shaft tidal current energy water turbine and using method
  • Horizontal shaft tidal current energy water turbine and using method
  • Horizontal shaft tidal current energy water turbine and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like Figure 1 to Figure 5 As shown, the present embodiment provides a horizontal axis tidal energy turbine blade 1, including a main wing 11 and a flap 12, wherein the flap 12 is arranged at the trailing edge of the main wing 11, and there is a possible Variable-area permeable channels.

[0037] Further, such as figure 1 As shown, the main wing 11 and the flap 12 are connected by a crank connecting rod 13, wherein one end of the crank connecting rod 13 is installed at the 1 / 3 chord length from the leading edge of the main wing 11 blade tip, and the other end is installed at a distance from the flap 12. 1 / 3 of the chord length of the leading edge of the blade tip; through the crank connecting rod, the flap 12 can be deflected around the trailing edge of the main wing 11 to change the radian of the blade 1 . It should be noted that the connection between the main wing 11 and the flap 12 is not limited to the crank connecting rod 13, but also can be connected through ot...

Embodiment 2

[0041] like Figure 4 to Figure 5 As shown, the present embodiment provides a horizontal axis tidal energy water turbine, including a support structure 4 and a water turbine installed on the top of the support structure 4, wherein the water turbine includes a cabin 3 connected to the support structure 4, a cabin installed inside the cabin 3 The generator (not shown in the figure), the hub 2 connected to the generator shaft and the blades 1 of several embodiments installed on the hub in the circumferential direction, wherein the main wing 11 is fixedly connected to the hub 2, and the flap 12 is installed on the hub 2 On the slideways arranged in the circumferential direction, the crank connecting rod 13 is connected with the driving device (not shown in the figure) arranged in the hub 2; the water turbine is directly fixed on the seabed through the support structure 4.

[0042]When working, the water flow drives the blade 1 to rotate, and then drives the hub 2 connected with th...

Embodiment 3

[0047] Based on the horizontal-axis tidal energy turbine provided in Embodiment 2, this embodiment provides its specific usage method, as follows:

[0048] When the water turbine is in the normal working state, the driving device does not work. At this time, the water flow passes through the water-permeable channel between the main wing 11 and the flap 12, and the water-flow at the trailing edge of the suction surface of the main wing 11 is increased by using the water-permeable channel to inject the fluid. flow rate;

[0049] When the water turbine blade needs to be adjusted, the driving device works, and the driving device controls the crank connecting rod 13 to run, and the crank connecting rod 13 drives the flap 12 to slide along the slideway on the hub 2, so that the overall curvature of the blade 1 increases.

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Abstract

The invention discloses a horizontal shaft tidal current energy water turbine and a using method. The horizontal shaft tidal current energy water turbine comprises blades and a supporting structure, each blade comprises a main wing and a flap, each flap is arranged at the tail edge of the corresponding main wing, and a water-permeable channel with a variable area exists between each main wing and the corresponding flap. Due to the adoption of the structural design that the water-permeable channels exist between the main wings and the flaps, the flow speed at the tail edges of the suction surfaces of the main wings can be increased through the ejection effect of the water-permeable channels between the main wings and the flaps on water flow, and the aim of improving boundary layer separation is achieved. Meanwhile, the flow separation phenomenon and energy loss on the blade surfaces are reduced, and therefore the lift force of the blades and the energy conversion efficiency of the water turbine are improved. Meanwhile, through the structural design that the area of the water-permeable channels is variable, when the speed of water flow around the blades is increased, the area of the water-permeable channels is adjusted, then the overall camber of the blades is increased, the stall attack angle is increased, the occurrence of blade stall is delayed, and therefore the operation range of the tidal current energy water turbine is widened.

Description

technical field [0001] The invention relates to the technical field of tidal current power generation, in particular to a horizontal-axis tidal current energy turbine and a use method thereof. Background technique [0002] In recent years, with the continuous increase of the global population, the consumption of traditional fossil energy such as coal, oil, and natural gas has increased year by year, and the effective development and utilization of renewable energy has become the focus of research in various countries. The horizontal axis tidal energy turbine is an important device for converting ocean current energy and tidal energy into electrical energy. Its power generation principle is similar to that of wind power generation, but its energy density is higher and its regularity is stronger. Because of the advantages of good controllability, low economic investment, and cleanliness and pollution-free, horizontal axis tidal energy turbines have been widely used in offshore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/12F03B3/14F03B13/26
CPCF03B3/123F03B3/126F03B3/14F03B13/264Y02E10/30
Inventor 王文全王秀虎周平闫妍
Owner SICHUAN UNIV
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