CN100462557C

CN100462557C - Vertical axis wings type wind mill

Info

Publication number: CN100462557C
Application number: CNB2007100370282A
Authority: CN
Inventors: 顾建明; 顾茜姣
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2007-02-01
Filing date: 2007-02-01
Publication date: 2009-02-18
Anticipated expiration: 2027-02-01
Also published as: CN101012806A

Abstract

The invention relates to a vertical-shaft aerofoil wind mill, comprising rotary axle, bearing, upper and lower discs, blades, support and support rod. The invention uses Rufocosk lifting theory, the blades are made into aerofoil shape via metal material to be vertically fixed between upper and lower discs, the rotary axle is through the centers of upper and lower disc to be fixed with them, the support is made from metal, a couple of bearings are fixed on the ends of upper and lower arms of support, the rotary is mounted in lower and upper bearings of support, and the support rod is connected to the lower part of support. When there is horizontal wind in, the wind mill will rotate and the rotary axle will output mechanical power. The invention can save energy and use new energy.

Description

Vertical axis wings type wind mill

Technical field:

What the present invention relates to is the vertical axis wings type wind mill that is shaped as wing blade of a kind of vertical-shaft wind-power machine, particularly a kind of blade, belongs to the fluid machinery technical field.

Background technique:

In prior art, wind energy conversion system has two kinds of vertical shaft and horizontal axis.Because the direction of wind can change with the variation of weather, so horizontal-shaft wind turbine is usually adjusted direction by empennage; And the vertical shaft type wind energy conversion system since during impeller operation not wind-engaging to restriction, so do not need empennage, structure is just much simple.In vertical-shaft wind-power machine, since blade be distributed in rotating shaft around, in order to improve the efficient of vertical-shaft wind-power machine, in existing vertical-shaft wind-power machine, often take to make the blade of axle one side to increase wind-receiving face as far as possible, and the blade of axle opposite side reduces wind-receiving face as far as possible, increases the rich axle of wind energy conversion system rotating moment.But because impeller rotating, require on the impeller arbitrary blade one change between, reach " half the time increase wind-receiving face ", the effect of " second half time decreased wind-receiving face " also is not easy, and must have the complicated mechanism of a cover to realize.

The patent No. is CN 03110078.3, name is called " the folded formula wind wheel vertical shaft resistance type windmill of shielding ", and it mainly is " to have set up a screening arrangement in S type wind wheel periphery; it keeps off the despining wind-force of wind wheel sense of rotation in the wind wheel outside, and the open part of wind wheel utilization is obtained effective wind energy.When wind speed and direction changes, adjust the position of screening arrangement, can obtain the wind energy of different direction ".The shape from blade that also has is considered, the patent No. is CN97116440.1, name is called the patent of invention of " the double feather like blade of wind energy conversion system special use ", it mainly be " by the big position of inclined to one side leaf width one bent angle towards the leaf pelvic surface of sacrum is arranged at blade ...; the leaf basin is parabolic curve and the synthetic concave arc profile of three-dimensional flow curve; ..., utilize the leaf basin, difference, the corner of blade back profile air-flow install running shaft; reach the starting sensitivity, high efficiency utilizes wind-force to convert energy to ".These two kinds of wind energy conversion systems all are the forms that belongs to " increasing or reduce wind-receiving face ".The patent No. is CN98111548.9, name is called the patent of invention of " Wing swinging type vertical shaft wind motor ", it is by 3 blades, mainly be " can make fin swing one small angle automatically by modulator; keep the best air-flow angle of attack automatically ", this upright shaft wind motor is owing to use modulator to change the fin angle, so also more complicated of structure.

Summary of the invention:

For deficiency and the defective that overcomes prior art, the present invention proposes a kind of application " Joukowski " lift theory, adopts the vertical axis wings type wind mill of wing blades.

The present invention is achieved through the following technical solutions.The present invention includes rotating shaft, bearing, go up lower disc, blade, support and strut.Blade becomes wing blade by metal material processing, is vertically mounted between disk and the lower disc by welding or riveted joint.Blade inlet edge is in the disk outside, and blade trailing edge is in the disk inboard, the chord length direction of blade, promptly before, the radial direction of the line direction of trailing edge and impeller is consistent.The center of upper and lower disk is passed at the two ends of rotating shaft respectively, and fixing with upper and lower disk welding.Support by metallic material make "

" the shape structure, the rack-mount respectively end of two arms down of pair of bearings, rotating shaft 1 is installed in respectively in the metal (upper of support, and the bottom of support is connected with strut.Know by " Joukowski " lift theory, when air-flow (wind) is flowed through an object, as long as flowing through the path length of upper surface and lower surface does not wait, can produce circular rector at this body surface, be subjected to an active force vertical because the existence of circular rector is known from experience, characterize with lift coefficient usually with coming flow path direction.When this active force was vertical with the axle that supports this object, this object will sway.Usually air-flow is when flowing through wing, and the chord length direction of airflow direction and wing is also inconsistent, and the angle of this both direction is called attacks (dashing) angle, represents with α.When air-flow blows to the wing lower surface, be called positive incidence, i.e. α〉0; Otherwise then be negative angle of attack, i.e. α＜0.Because impeller is rotating around the rotating shaft of centre, so the angle of attack between it and air-flow is just become by negative concerning a certain blade wherein.Usually angle of attack lift coefficient in 0～10 degree scope of aerofoil profile is best.Because wind energy conversion system is rotating, so almost always there is blade to be in above-mentioned scope.As on other positions, when positive incidence was big, air-flow still was helpful to the effect of wing for the rotation of wind energy conversion system; When negative angle of attack, air-flow can produce resisting moment to the effect of wing, and the size of this resisting moment is relevant with the aerofoil profile of wing.So when the design wind energy conversion system, can make when positive incidence, can produce bigger moment of rotation, and when negative angle of attack, produce as far as possible little resisting moment by selecting suitable aerofoil profile.Like this,, convert wind energy to mechanical energy, just can generate electricity if rotating shaft drives generator as long as, the wind-force function is continuously rotated no matter that direction has wind.So the present invention is for energy saving, the development and use new energy promote the sustainable development of society to have substantial role.

Description of drawings:

Fig. 1 is the structural representation of vertical axis wings type wind mill.

Fig. 2 is the blade working schematic representation of vertical axis wings type wind mill of the present invention.

Disk, 4 blades, 5 lower discs, 6 supports, 7 struts on 1 rotating shaft among the figure, 2 bearings, 3, α represents the angle of airflow direction and airfoil chord length direction, arrow is represented the direction of air-flow (wind).

Embodiment:

Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described:

As shown in Figure 1 and Figure 2, the present invention includes rotating shaft 1, pair of bearings 2, last disk 3, blade 4, lower disc 5, support 6 and strut 7.Blade 4 becomes wing blade by metal material processing, is vertically mounted between disk 3 and the lower disc 5 by welding or riveted joint.The center of disk 3 and lower disc 5 is passed at the two ends of rotating shaft 1 respectively, and fixing with last disk 3 and lower disc 5 welding.The leading edge of blade 4 is in the outside of disk 3 and lower disc 5, and the trailing edge of blade 4 is in the inboard of disk 3 and lower disc 5, and the chord length direction of blade 4 is consistent with the radial direction of lower disc 5 with last disk 3, and the number of blade is got 6～8.Support 6 by metallic material make " " the shape structure; pair of bearings 2 is installed in the end of support two arms about in the of 6 respectively; rotating shaft 1 is installed in respectively in the metal (upper 2 of support 6; strut 7 is connected with the bottom of support 6; height of strut 7 is decided according to specific requirement; can accept wind action is foundation, can directly be fixed on higher top of building, or be fixed on the ground of clearing.Vertical axis wings type wind mill is after correct position is installed, in case have wind in horizontal either direction, wind energy conversion system will rotate, and mechanical work output is just arranged in the rotating shaft, and rotating shaft just can be sent electricity and come if driven generator.

Claims

1. vertical axis wings type wind mill, comprise rotating shaft (1), bearing (2), last disk (3), blade (4), lower disc (5), support (6) and strut (7), it is characterized in that using " Joukowski " lift Design Theory blade (4), blade (4) becomes wing blade by metal material processing, be vertically mounted between disk (3) and the lower disc (5), its upper end is fixed with last disk (3), lower end and lower disc (5) are fixed, the leading edge of blade (4) is in the disk (3) and lower disc (5) outside, the trailing edge of blade (4) is in disk (3) and lower disc (5) inboard, the chord length direction of blade (4) is consistent with the radial direction of lower disc (5) with last disk (3), the center of disk (3) and lower disc (5) is passed at the two ends of rotating shaft (1) respectively, and fixing with last disk (3) and lower disc (5) welding, support (6) is made by metallic material

Shape structure, pair of bearings (2) are installed in support (6) end of two arms up and down respectively, and rotating shaft (1) is installed in respectively in the metal (upper (2) of support (6), and strut (7) is connected with the bottom of support (6).

2. vertical axis wings type wind mill according to claim 1, the quantity that it is characterized in that described blade (4) is 6～8.