CN101230832A

CN101230832A - Antivibration wind power generator

Info

Publication number: CN101230832A
Application number: CNA2007100084971A
Authority: CN
Inventors: 许金聪; 许佳铭
Original assignee: Fujian Jinjiang Juwang Printing & Dyeing Machinery Co Ltd
Current assignee: Fujian Jinjiang Juwang Printing & Dyeing Machinery Co Ltd
Priority date: 2007-01-24
Filing date: 2007-01-24
Publication date: 2008-07-30

Abstract

The invention discloses an anti-vibration aerogenerator, which carries out the improvement for the shape and the structural constitution of a vane. The invention is especially characterized in that the aerogenerator adopts a structure that a restriction damping layer is coated outside a vane body or the restriction damping layer is filled in the vane body; the internal structure of a pylon is improved to be structure that the center part of the pylon is profile steel and a restriction damping layer is coated outside the profile steel. When supernormal wind power or a wind rotor urges the pylon, the restriction damping can effectively weaken vibration. The invention also directly sleeves a rubber damper on a steel wire rope, thus the elastic constant of damping rubber can be changed and the rubber damper can be in effective operating state. Compared with the prior art, the anti-vibration aerogenerator can ensure that the vane and the pylon reach a stable state in minimum time after the vane and the pylon are impacted by the wind power.

Description

Antivibration wind power generator

Technical field

The present invention relates to a kind of generator, be meant a kind of wind-driven generator especially with good resistance to shock.

Background technique

Existing wind-driven generator is installed on fan blade on the cantilevered axle that the motor front end stretches out, because the fan blade diameter of wind-driven generator is big, and discontinuity, it is frequent to quicken, slow down, thereby the wind-driven generator of this structure very easily causes the motor body vibration.In order to reduce the body vibration of wind-driven generator, just require motor overall structure rigidity big, therefore, the technological scheme that prior art is taked is the weight and volume that further increases motor, makes script more apparent clumsy with regard to big wind-force electrical machinery with regard to weight, volume.

Summary of the invention

At the defective that exists in the prior art, the invention provides a kind of antivibration wind power generator, this wind-driven generator can make blade and pylon reach steady state in the shortest time after blade and pylon are subjected to the impact of wind-force.

For achieving the above object, technological scheme of the present invention is:

Antivibration wind power generator, mainly comprise pylon, solid of rotation, blade, wire rope, described blade coats one deck restriction damping layer in the titanium steel outside, this restriction damping layer is a double-layer structure, one deck is the damping layer that viscoelastic material is made, one deck is the restraint layer that aluminium or steel plate are made, and restraint layer sticks on the titanium steel outer surface, and skin is a restraint layer.

Described blade is filled restriction damping layer at the glass fibre reinforced plastics core, and this restriction damping layer is a double-layer structure, and one deck is the damping layer that viscoelastic material is made, and one deck is the restraint layer that aluminium or steel plate are made, and damping layer sticks on the glass fibre reinforced plastics internal surface, and central core is a restraint layer.

The central part of pylon is a shaped steel, and the shaped steel outside is covered with the damping layer that one deck viscoelastic material is made, and the damping layer outside coats the layer of metal plate again.

Described antivibration wind power generator also comprises a damping dynamic damper, this damping vibration absorber uses damping rubber as damper, damping rubber is enclosed within on the wire rope, and the damping rubber outside has certain weight semi-ring clamping sleeve compacting with two, with bolt locking semi-ring clamping sleeve.

The usefulness of technique scheme is:

Compared with prior art, the improvements that the present invention is main: 1. the profile and the structure formation of blade are improved, particularly the blade structure formation has adopted in main body outsourcing one deck restriction damping layer or filled restriction damping layer in main body, make blade after the impact that is subjected to wind-force, blade can reach steady state in the shortest time; 2. to be improved to the central part of pylon be shaped steel to the pylon internal structure, the shaped steel outside is covered with one deck restriction damping layer, when pylon is subjected to the excitation of extraordinary wind-force or wind wheel, constrained damping structure is attenuation vibration effectively, and pylon is returned to stable after being impacted very soon; 3. rubber cushion assembly also directly is inserted in the present invention on wire rope, regulates the compaction of two semi-ring clamping sleeves to rubber cushion assembly by bolt, can change the elastic constants of damping rubber, allows the damping dynamic damper be in effective working state.

Description of drawings

Fig. 1 is an antivibration wind power generator structural representation of the present invention;

Fig. 2 is the blade structure schematic representation;

Fig. 3 is embodiment's one structural representation of Fig. 2 A-A cross section;

Fig. 4 is embodiment's two structural representations of Fig. 2 A-A cross section;

Fig. 5 is the pylon structure schematic representation;

Fig. 6 is Fig. 5 B-B cross-sectional structure schematic representation;

Fig. 7 is a damping dynamic damper structural representation of the present invention.

Embodiment

The present invention now is described in conjunction with the accompanying drawings and embodiments.

Wind-driven generator as shown in Figure 1 mainly is made up of parts such as blade 1, pylon 2, wire rope 3.Blade 1 is the most complicated stressed parts in the wind-force electrical machinery, and blade 1 is a workpiece, and various excitation forces pass by blade 1.Blade 1 structure is the slender body of circumferential length, tangential weak point, and blade 1 is flexible good, is as easy as rolling off a log vibrative elastomer, and various vibrations at first occur on the blade 1.Blade 1 also is subjected to air-damped effect in rotation, produce lift, is aeroelasticity parts.The vibration of blade 1 has three kinds of form weave ins, waves, shimmy and torsional oscillation.

Fig. 2 represents blade 1 overall structure, implements structure for two kinds of the A-A cross section in Fig. 3,4 presentation graphs 2.Blade 1 produces the crack because of vibration, Fig. 3 represents that blade is at titanium steel 11 outsides cladding one deck restriction damping layer 12, restriction damping layer 12 energy antifatigues, the main cause that produces the crack is that blade 1 is under the effect of air-flow, produce dynamic stress fatigue at resonance region, after overdamping was handled, dynamic stress dropped to 20% of former level.Restriction damping layer 12 is double-layer structures, and the damping layer that one deck is made with viscoelastic material, thickness be less than 0.1 millimeter, the restraint layer that one deck is made with aluminium or steel plate, and thickness is less than 0.2 millimeter.Another embodiment is as shown in Figure 4: blade 1 is filled restriction damping layer 14 at glass fibre reinforced plastics 13 cores, utilize the damping layer that viscoelastic material makes and the relative movement of glass fiber reinforced plastic surface to produce frictional damping, be subjected to the impact of wind-force at blade after, blade can reach steady state in the shortest time.Fill restriction damping layer 14 at glass fibre reinforced plastics 13 cores, restriction damping layer 14 is double-layer structures, the outer damping layer made from viscoelastic material, and damping layer sticks on the glass fibre reinforced plastics internal surface, the restraint layer that internal layer is made with aluminium or steel plate.

Another improvement of the present invention is: the cabin of big quality and the wind wheel of rotation have been installed at the top of pylon 2, because natural wind all is changeable on time and space, wind is very complicated to the effect of pylon 2 structures, and the pulsation of wind speed in time can cause pylon 2 structural vibrations.Wind-force can reach ten times or tens times of normal wind when maximum, aerodynamic force unstability can take place for this, causes galloping or flutter, causes pylon 2 structural damages.The distortion and the vibration of pylon 2 structures produce the additional stress of pylon 2 structures, influence the intensity of pylon 2 structures, also can influence the normal operation of the wind wheel at pylon 2 tops.

Pylon 2 as shown in Figure 5 mostly is elongated circle or frame-type structure, the cross section of the pylon frame-type structure that Fig. 6 represents.The intrinsic dynamic property of pylon 2 is to the verticity important influence of wind wheel.The additional damping structure of use Fig. 6 can effectively change the intrinsic dynamic property of pylon, uses damping structure can improve the vibration resistance of pylon.As shown in Figure 6, the central part of pylon 2 is a shaped steel 21, and shaped steel 21 outsides are covered with one deck restriction damping layer 22, covers the attached layer of one deck steel plate 23 again in these restriction damping layer 22 outsides.Constrained damping structure 22 is to cover the layer of metal layer again in viscoelastic material layer, and viscoelastic material layer is called damping layer, and metal layer is called restraint layer.When the frame structure of pylon 2 was vibrated by bending, damping layer is elongation therefore, and the elongation of restraint layer will be less than the elongation of damping layer; When damping layer is compressed and extends, restraint layer can stop the compression of damping layer.When pylon 2 is subjected to the excitation of extraordinary wind-force or wind wheel, constrained damping structure 22 attenuation vibration effectively, pylon 2 is returned to stable after being impacted very soon.

The pylon of wind-force electrical machinery is not only thin but also high, with wire rope 3 tensions, is used for guaranteeing the stable of pylon 2 all around.After the excitation that is subjected to wind-force, wire rope 3 meeting violent oscillatory motions, serious meeting fracture because resonate.Therefore, the present invention also is contained in damping dynamic damper 31 on the wire rope, as shown in Figure 1.Structure such as Fig. 7 of damping dynamic damper 31 represent, these vibration absorber 31 usefulness damping rubbers 311 are as damper, damping rubber 311 directly is enclosed within on the wire rope 3, damping rubber 311 outsides are with two semi-ring clamping sleeve 312 compactings, two semi-ring clamping sleeves 312 have certain weight, and four bolts of two semi-ring clamping sleeve 312 usefulness 313 connect, and bolt 313 can be regulated the compaction pressure of damping rubber 311, change the elastic constants of damping rubber 311, allow damping dynamic damper 3 be in effective working state.Use the result can make pylon 2 after being subjected to the wind-force excitation, be returned to steady state rapidly.

Claims

1. antivibration wind power generator, mainly comprise pylon, solid of rotation, blade, wire rope, it is characterized in that: described blade coats one deck restriction damping layer in the titanium steel outside, this restriction damping layer is a double-layer structure, one deck is the damping layer that viscoelastic material is made, one deck is the restraint layer that aluminium or steel plate are made, and restraint layer sticks on the titanium steel outer surface, and skin is a restraint layer.

2. antivibration wind power generator according to claim 1, it is characterized in that: described blade is filled restriction damping layer at the glass fibre reinforced plastics core, this restriction damping layer is a double-layer structure, one deck is the damping layer that viscoelastic material is made, one deck is the restraint layer that aluminium or steel plate are made, damping layer sticks on the glass fibre reinforced plastics internal surface, and central core is a restraint layer.

3. according to claim 1,2 described antivibration wind power generators, it is characterized in that: the central part of pylon is a shaped steel, and the shaped steel outside is covered with the damping layer that one deck viscoelastic material is made, and the damping layer outside coats the layer of metal plate again.

4. according to claim 1,2 described antivibration wind power generators, it is characterized in that: described antivibration wind power generator also comprises a damping dynamic damper, this damping vibration absorber uses damping rubber as damper, rubber cushion assembly is enclosed within on the wire rope, the rubber cushion assembly outside has certain weight semi-ring clamping sleeve compacting with two, with bolt locking semi-ring clamping sleeve.

5. antivibration wind power generator according to claim 3, it is characterized in that: described antivibration wind power generator also comprises a damping dynamic damper, this damping vibration absorber uses damping rubber as damper, rubber cushion assembly is enclosed within on the wire rope, the rubber cushion assembly outside has certain weight semi-ring clamping sleeve compacting with two, with bolt locking semi-ring clamping sleeve.