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Horizontal shaft tidal current energy water turbine with snail spiral blades

A spiral and tidal current energy technology, which is applied in mechanical equipment, hydroelectric power generation, ocean energy power generation, etc., can solve problems such as poor economy, low efficiency of the whole machine, and low efficiency

Active Publication Date: 2016-07-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the structural classification, the existing tidal energy turbines mainly include horizontal axis turbines, vertical axis turbines and oscillating hydrofoils. These tidal energy turbines have their own advantages and disadvantages. Horizontal axis turbines have relatively mature technology and high energy harvesting efficiency, but serious yaw loss ; Although the structure of the vertical axis turbine is simple and easy to maintain, it still has the problems of difficult self-starting and low efficiency; the research on the oscillating hydrofoil started relatively late and is still in the exploratory stage
At the same time, the vibration and noise of these water turbines are large, which has a certain degree of impact and damage on the marine environment on which marine organisms such as fish and cephalopods depend.
Judging from the published patented technology, it is also impossible to enter the practical stage due to the aforementioned deficiencies
[0004] Chinese patent application 201210556394.X discloses a "compound tidal energy vertical axis turbine". Although this scheme adopts an external H-shaped structure and an internal S-shaped structure, it has the advantages of fast start-up performance and good stability. Direction arrangement makes the whole machine less efficient and has a greater impact on marine life
Chinese patent application 201310291232.2 discloses "a tidal current energy harvesting turbine with variable blade posture". Too complex, poor economy, no practical value

Method used

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  • Horizontal shaft tidal current energy water turbine with snail spiral blades
  • Horizontal shaft tidal current energy water turbine with snail spiral blades
  • Horizontal shaft tidal current energy water turbine with snail spiral blades

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Embodiment 1

[0101] The design scheme of embodiment 1 is exactly the same as the above-mentioned technical scheme of the present invention, and the design parameters of its main components are disclosed as follows:

[0102] The quantity of snail helical blade (1) of the present invention is 2 pieces; The cross-section shape of snail helical blade (1) is selected symmetrical airfoil; The height of snail helical blade (1) is 310cm, maximum diameter is 280cm, The minimum pitch is 85cm, and the pitch gradient ratio is 5:6; the height of the conical hub (2) is 310cm, and the maximum diameter is 105cm; the height of the water guide cone (11) is 185cm, and the diameter is 105cm.

Embodiment 2

[0103] The design scheme of embodiment 2 is exactly the same as the above-mentioned technical scheme of the present invention, and the design parameters of its main components are disclosed as follows:

[0104] The quantity of the snail spiral blade (1) of the present invention is 1 piece; The cross-sectional shape of the snail spiral blade (1) selects an asymmetric airfoil; the height of the snail spiral blade (1) is 320cm, and the maximum diameter is 290cm. The minimum pitch is 85cm, and the pitch gradient ratio is 5:6; the height of the conical hub (2) is 320cm, and the maximum diameter is 105cm; the height of the water guide cone (11) is 195cm, and the diameter is 105cm.

Embodiment 3

[0105] The design scheme of embodiment 3 is exactly the same as the above-mentioned technical scheme of the present invention, and the design parameters of its main components are disclosed as follows:

[0106] The quantity of the spiral blade (1) to snail of the present invention is 5 pieces; The cross-sectional shape of the spiral blade (1) of the snail selects the symmetrical airfoil; The height of the spiral blade (1) of the spiral is 320cm, and the maximum diameter is 255cm, the minimum pitch is 90cm, and the pitch gradient ratio is 5:6; the height of the conical hub (2) is 320cm, and the maximum diameter is 105cm; the height of the water guide cone (11) is 160cm, and the diameter is 105cm.

[0107] The specific application process of the present invention is: the runner of the present invention includes a snail-shaped blade (1) and a conical hub (2) in cooperation, when the tidal current in the ocean impacts the snail-shaped blade of the runner of the present invention (...

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Abstract

The invention relates to a horizontal shaft tidal current energy water turbine with snail spiral blades. The horizontal shaft tidal current energy water turbine comprises a main shaft, a machine case, a thrust bearing, a coupler, a power generator, a rack, a base and a water guide taper; and the lower portion of the machine case is supported by the rack and the base. The horizontal shaft tidal current energy water turbine is characterized by further comprising the snail spiral blades in two-dimensional snail spiral line shapes, a similar-taper hub soaked into water tide and a sealing cover; the power generator is connected with the similar-taper hub through the coupler and the main shaft, the sealing cover is arranged at the connecting position of the main shaft and the similar-taper hub, and the water guide taper is arranged at the position, on the back side of the similar-taper hub, of the tail of the machine case; and the snail spiral blades are evenly distributed on the periphery of the similar-taper hub to rotate at a constant speed in a manner that the snail spiral blades conducts gradual change stretching in the axial direction of the similar-taper hub through the thrust bearing to form spatial warping shapes. According to the horizontal shaft tidal current energy water turbine, hydraulic power friction collision is greatly reduced, and the inlet water head losses are reduced, so that the energy obtaining efficacy of the water turbine is accordingly improved, and the aim of smooth passing of ocean fish schools is achieved.

Description

technical field [0001] The invention belongs to the technical field of water turbine power generation, in particular to a horizontal axis tidal current energy water turbine with snail-shaped blades. Background technique [0002] In recent years, with increasing attention to marine resources and marine rights and interests, human exploration and development of tidal current energy is gradually heating up. As an important part of ocean energy, tidal current energy has predictability, high power density and energy stability. Outstanding advantages, development and utilization have attracted much attention. [0003] The development of tidal current energy is mainly concentrated in the field of power generation technology, and the tidal current energy turbine is its core energy conversion device. According to the structural classification, the existing tidal energy turbines mainly include horizontal axis turbines, vertical axis turbines and oscillating hydrofoils. These tidal en...

Claims

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Application Information

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IPC IPC(8): F03B13/26F03B3/12F03B11/00
CPCF03B3/121F03B11/006F03B13/26F05B2250/15F05B2250/232Y02E10/20Y02E10/30
Inventor 阚阚郑源何中伟付士凤刘惠文陈会向陈荣杰
Owner HOHAI UNIV