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Arm-length-variable vertical shaft tide current water turbine generator set

A generator set and vertical axis technology, applied in the direction of tidal flow/damless hydropower, hydropower, machine/engine, etc., can solve the problem of low energy capture efficiency, achieve high energy capture efficiency, stable output power, increase self-efficiency Effects on startup performance

Inactive Publication Date: 2011-11-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that the energy capture efficiency of the current vertical axis tidal turbine is not high, and proposes a variable arm length vertical axis tidal turbine generating set

Method used

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  • Arm-length-variable vertical shaft tide current water turbine generator set
  • Arm-length-variable vertical shaft tide current water turbine generator set
  • Arm-length-variable vertical shaft tide current water turbine generator set

Examples

Experimental program
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Effect test

Embodiment

[0039] Taking the single blade variable arm long vertical axis tidal current turbine generating set as an example, the simulation effect of the present invention is explained as follows:

[0040] (1) Tidal current conditions: tidal flow velocity 2m / s.

[0041](2) Design results: the turbine speed is 55 rpm, single blade, the blade airfoil is NACA0025, the blade chord length is 0.15m, the span length is 1.5m, the blade preset angle of attack is 0°, and the resistance and dynamics of the shaft and arm are not considered. effect.

[0042] (3) Simulation state description, as shown in Figure 4:

[0043] State 1: The blade arm length is fixed, and the outer diameter of the turbine is always 0.6m;

[0044] State 2: The arm length of the blade is variable. Along the incoming flow direction, the blade arm length is the largest, which is 1.2m. Vertically, the blade arm length is the smallest, which is 0.6m. The blade rotation track is elliptical;

[0045] In the direction perpendicu...

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PUM

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Abstract

The invention relates to an arm-length-variable vertical shaft tide current water turbine generator set which belongs to the field of development of renewable energy sources. The generator set mainly comprises a blade, an arm seal, a telescopic arm, a piston, a fixed arm, a hydraulic cylinder for shortening, a hydraulic cylinder for extending, a support wheel disk, a compressing nut, a tide current speed and direction sensor, a main shaft, a main shaft bearing, a big gear, a support seat, a hydraulic oil station, a hydraulic pump for shortening, a hydraulic pump for extending, an electric brush, an integrated control system, a shaft neck seal, a small gear shaft bearing, a small gear shaft, a coupling and a generator. The telescopic arm is dynamically extended or shortened in the rotatingprocess of the blade according to the tide current direction and flow speed; and when the normal of the telescopic arm is parallel or perpendicular to the tide current direction, the telescopic arm is respectively changed to be the longest or shortest so that a vertical shaft tide current water turbine reaches highest energy capture efficiency. The self-start capability of the water turbine on low-speed tide current can be also improved by adjusting the telescopic arm. The arm-length-variable vertical shaft tide current water turbine generator set disclosed by the invention can be used for the comprehensive utilization and development of river water flow energy and ocean tide current energy.

Description

technical field [0001] The invention belongs to the field of renewable energy development, and relates to a variable arm long vertical axis tidal current water turbine generating set. Background technique [0002] Energy and the environment are major issues facing the sustainable development of mankind, and the development of clean and renewable energy is a consensus of all countries in the world. my country's sea area is vast, with a total area of ​​4.7 million square kilometers; the coastline is long and tortuous, with 18,000 kilometers of mainland coastline and 14,000 kilometers of island coastline. Ocean energy resources are abundant, of which 20 million kilowatts of tidal current energy can be developed. Water flow resources, development and application prospects are very broad. [0003] The tidal current has typical overall reciprocating characteristics, and the direction of the tidal current will fluctuate due to the influence of climate, season and marine environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B13/26F03B3/14F03B11/06
CPCY02E10/223Y02E10/226Y02E10/28Y02E10/20Y02E10/30
Inventor 宿晓辉刘艳赵广孙涛赵鹏飞郭嘉楠杨冉升
Owner DALIAN UNIV OF TECH
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