CN202756176U

CN202756176U - Vertical-axis wind turbine with speed-adjustable wind turbine blades

Info

Publication number: CN202756176U
Application number: CN 201220211943
Authority: CN
Inventors: 李�杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2013-02-27
Anticipated expiration: 2022-05-08

Abstract

The utility model relates to a vertical-axis wind turbine. Speed loss of blades of an existing vertical-axis wind turbine is not controlled effectively and can be only controlled by an electromagnetic brake and a manual brake of the vertical-axis wind turbine, so that size and cost of the vertical-axis wind turbine are increased, and maximum loss of power output in the speed loss state is caused. Wind speed of the blades is adjusted by changing attacking angles of the blades. A simple speed adjuster is used for controlling swing of the blades, and speed loss of the blades is eliminated by changing the attacking angles of the blades. The vertical-axis wind turbine with the speed-adjustable wind turbine blades no longer needs an extra controller, and is simple in structure and low in cost.

Description

A kind of vertical axis aerogenerator of wind wheel blade variable-speed

Technical field

The utility model relates to wind-driven generator, is specially a kind of being applied to from net type vertical axis aerogenerator.

Background technique

Wind motor is divided into rectilinear and the horizontal motor at present; With respect to horizontal axis wind-driven generator, because rectilinear wind power generating motor volume is little, easy for installation, start that wind speed is little, adaptive faculty is strong during change of the wind, it has the advantages such as efficient is high, wind energy utilization is high, quiet, maintenance cost is low, has obtained at present widely development and utilization.That resistance type or its wind wheel blade of lifting-force type vertical-axis wind power generator group are all fixed, after surpassing rated wind speed, because the restriction of mechanical strength and the physical properties such as generator, power electronics capacity, must reduce the energy capture of wind wheel, power stage is still remained near the rating value.So also limited simultaneously the impact that load that blade bears and whole wind energy conversion system are received, thereby guaranteed that wind energy conversion system is without prejudice safely.Otherwise stall will cause blade vibration, and the stall of blade power is non-linear flutter, will cause very large dynamic stress, causes the blade fatigue ruption, affects wind energy conversion system safety in operation and reliability.But the vertical axis aerogenerator of prior art does not also have good controlling method in fan blade stall at present, the stall that can only control fan blade by electromagnetic brake and the manual brake of generator, this just in the volume and cost that strengthen generator, has also caused the loss of power stage under the stall conditions.

Summary of the invention

For defects, the utility model provides a kind of improved vertical axis wind power generator, improves the ride quality of wind wheel by changing attack angle of blade, the relation between the variation of adaptation wind speed, adjusting wind speed and wind driven generator load.Solve like this problem of present vane of vertical shaft wind-driven generator stall, the wind-power electricity generation function is worked in wider wind speed range, still can keep the steady output of power in the high wind speed section.Greatly improved the whole generating efficiency of wind-driven generator.

For achieving the above object, the technical solution of the utility model is: a kind of Novel vertical axis wind turbine, comprise main shaft perpendicular to the ground, electricity generating device, the described lift force blade of lift force blade are wing shape structure, and link to each other with main shaft and be equally spaced around main shaft by connecting rod, wheel hub, the controlling device of regulating the fan blade angle of attack also is installed on the described lift force blade.

The further improved vertical axis aerogenerator of the utility model is characterized in that: by being installed in the arrangements for speed regulation on the fan blade, fan blade being swung with the wind form certain angle of attack a, the maximum angle that left and right sides angle of attack a can form respectively is 15 degree.For fan blade is swung with the wind, at fan blade controlling device is installed.This arrangements for speed regulation that are installed on the fan blade are to impel fan blade to swing by machinery, microcomputer control device to form a kind of fan blade attack angle regulator of the angle of attack.

Lift fan blade of the present utility model has adopted wing shape structure, its objective is in order to take full advantage of the starting characteristic of wing, utilizes the lift efficiency of wing to promote the rotation of wind wheel.The utility model is equipped with the controlling device of regulating the fan blade angle of attack at wing, the controlling device of this present case is flexural pivot.Be installed in the upper and lower end of lift fan blade, on the position before the blade inlet edge 1/4 blade chord length, can guarantee like this blade at any angle wind to the active force spot of resultant force of blade at the rear of rotating shaft, blade is swung with the wind.

Description of drawings

Fig. 1 is assembling assumption diagram of the present utility model;

Fig. 2 is plan view of the present utility model;

Fig. 3 is the structural drawing of the utility model flexural pivot;

Among the figure: 1 is main shaft; 2 is lift force blade; 3 is connecting rod; 4 is wheel hub; 5 is electricity generating device; 6: controlling device; 7 coupling shafts.

Embodiment

In order to deepen that understanding of the present utility model is described further the utility model below in conjunction with drawings and Examples, this embodiment only is used for explaining the utility model, and the not in pairs restriction of the utility model protection domain.

With reference to shown in Figure 1: the utility model relates to a kind of vertical axis aerogenerator, comprise main shaft perpendicular to the ground 1, be installed in the electricity generating device 5 below the main shaft 1, be connected to the upper and lower wheel hub 4 on the main shaft 1, the lift force blade 2 of three wing shape structures, described three lift force blades 2 are equally spaced around main shaft 1 by connecting rod 3; Every lift force blade 2 correspondences upper and lower two groups of connecting rods 3, every group of connecting rod 3 is two, and it connects respectively lift force blade 2 and wheel hub 4, and described every group two connect 3 and strut angulation β, and angle beta is chosen between 30 degree-60 degree, can improve the whole strength of connecting rod with this; Described lower hub is connected with electricity generating device 5 by connecting dish, rotates when lift force blade 2 rotarily drives wheel hub, thereby makes electricity generating device start operation by connecting dish.

With reference to shown in Figure 2: this figure is the plan view of model utility.In the middle of lift force blade 2 rotations, when wind speed surpasses its rated wind speed, controlling device will begin to regulate angle of attack a, make lift force blade 2 begin to swing.Wind speed is larger, and its angle of attack a will become larger, and the amplitude of fluctuation of lift force blade 2 also enlarges thereupon, and the maximum angle that left and right sides angle of attack a can form respectively is 15 degree.

With reference to shown in Figure 3: this case is that wind speed is regulated the ball-joint mechanism map.Use highi degree of accuracy De Shaft to hold in sphere section and use steel ball, by casting-forging method the steel ball bag is played Come, after keeping handle to be formed, by special welding connecting rod and ball are linked together.In addition, process the rolling screw at the outer ring outer diameter part, can be installed in simply on the connecting rod 3, do not had the solid of Inter gap to fix as long as screw tightening just can be reached.

Working principle of the present utility model is: wind wheel is in the middle of rotation, and when wind speed surpasses its rated wind speed, the controlling device that is installed on the fan blade will begin to regulate angle of attack a, make blade begin to swing.Wind speed is larger, and its angle of attack a will become larger, and the amplitude of fluctuation of blade also enlarges thereupon, and the maximum angle that left and right sides angle of attack a can form respectively is 15 degree.The stall conditions of fan blade under the At High Angle of Attack have just been avoided in the speed governing of fan blade.

As calculated, because this structure has been removed electromagnetic brake device in the generator, can be with the cost reduction 15% of vertical-axis generators, owing to having avoided the stall of fan blade, guarantee blower fan still can keep power in the high wind speed section steady output, can make so the whole raising about 40% of generating capacity.

Claims

1. vertical axis aerogenerator, comprise main shaft perpendicular to the ground, electricity generating device, lift force blade, it is characterized in that: described lift force blade is wing shape structure, and link to each other with main shaft and be equally spaced around main shaft by connecting rod, wheel hub, the arrangements for speed regulation of regulating the fan blade wind speed also are installed on the described lift force blade.

2. vertical axis aerogenerator according to claim 1 is characterized in that: by being installed in the arrangements for speed regulation on the fan blade, fan blade being swung with the wind form certain angle of attack a, the maximum angle that left and right sides angle of attack a can form respectively is 15 degree.

3. vertical axis aerogenerator according to claim 1 and 2 is characterized in that: be installed in arrangements for speed regulation on the fan blade and be by machinery, microcomputer control device and impel swing a kind of fan blade attack angle regulator of the formation angle of attack of fan blade.