CN202348566U

CN202348566U - Centrifugal blade-adjusting and speed-stabilizing device of small-type wind turbine generator

Info

Publication number: CN202348566U
Application number: CN2011203500928U
Authority: CN
Inventors: 章红涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-19
Filing date: 2011-09-19
Publication date: 2012-07-25
Anticipated expiration: 2021-09-19

Abstract

The utility model relates to a centrifugal blade-adjusting and speed-stabilizing device of a small-type wind turbine generator, and the device comprises a blade shaft, a synchronizer gear, a wind wheel disc, a synchronizer ring, a centrifugal heavy punch, a screw rod and a reset torsion spring, and is characterized in that the blade shaft is arranged on the wind wheel disc through a bearing; the extended end of the blade shaft is fixedly connected with a blade; the synchronizer gear is fixed on the blade shaft; the synchronizer ring meshed with the synchronizer gear is sleeved on the wind wheel disc; the heavy punch is fixed on the blade shaft through the screw rod; and the reset torsion spring is also sleeved on the blade shaft. The centrifugal blade-adjusting and speed-stabilizing device of the small-type wind turbine generator has a simple and reliable structure, and can be rotated under various wind speeds and loads; and when the generator is overspeed, the heavy punch drives the blade shaft to rotate through the screw rod under the action of centrifugal force, the reset torsion spring is used for resetting the blade shaft when the rotating speed of the generator is decreased, the blade is kept in an appropriate pitch angle to stabilize the rotating speed of the generator through combined action of the heavy punch and the reset torsion spring, and the occurrence of an accident of galloping of the generator is effectively prevented. The influence of wind speed or load variation of the engine on the rotating speed of the generator is reduced, and the fluctuation of output voltage of the generator is smaller.

Description

The centrifugal accent oar of small-sized wind power generator smooth rate apparatus

Technical field:

The utility model relates to the wind power plant field, is mainly used in middle-size and small-size wind-driven generator, and according to the variation of generator speed, the propeller pitch angle of adjusting wind wheel blade automatically comes constant wind power generator rotating speed, and generator is operated in the speed range of regulation.

Background technique:

The existing horizontal axis design of mini wind-driven generator that adopts below 20 kilowatts, its generator shaft is parallel to wind direction, and blade generally is fixedly mounted on the wind wheel dish; Therefore; The propeller pitch angle of blade immobilizes, and the blade wind loading rating of this generator simple in structure is poor, meets to surpass the strong wind that allows work wind speed; Generally be to adopt the head lateral deviation to reduce stressed maybe the need, otherwise generator is prone to hypervelocity damage or blade broken by producer's requirements generation outage of braking.

Summary of the invention:

The purpose of the utility model is that a kind of wind-driven generator that makes of design is operated in the centrifugal accent oar of the small-sized wind power generator smooth rate apparatus under the regulation rotating speed more stably.

The scheme of the utility model technical solution problem is that the centrifugal accent oar of small-sized wind power generator smooth rate apparatus comprises blade, sharf, synchromesh gear, wind wheel dish, synchronous circle, centrifugal weight, screw mandrel and reduction torsion spring; Sharf passes through Bearing Installation on the wind wheel dish; Its external part and blade are connected, and are fixed with synchromesh gear on the sharf, with the synchronous snare of synchromesh gear engagement on the wind wheel dish; Weight is fixed on the sharf through screw mandrel; Also be with reduction torsion spring on the sharf, weight drives sharf through screw mandrel and rotates under the effect of motor ultracentrifugation power, and reduction torsion spring resets sharf when motor speed descends.Weight and reduction torsion spring acting in conjunction make blade remain on more suitable propeller pitch angle.

It is characterized in that; Be with synchronous circle on the front diameter of axle of wind wheel dish; Synchromesh gear fixing on synchronous circle and the sharf meshes, and passes through the fixing secondary weight of screw mandrel on each sharf, the centrifugal force of weight generation on sharf when dependence wind wheel dish rotates; With reduction torsion spring elastic force acting in conjunction on each sharf control sharf rotational angle, and through synchronous circle be engaged with synchromesh gear and make sharf rotate the propeller pitch angle of adjustment fan blade synchronously.

The utility model has the advantages that; Simple in structure, reliable; Need not provide under the situation of external force, the centrifugal force that is provided through weight deflection, thus can adjust the fan blade propeller pitch angle easily, change fan blade and pass to the purpose that the torque of generator reaches the control generator speed.

Square being directly proportional of centrifugal force that weight is produced when wheel disc with the wind rotates and rotating speed, therefore, the increase of rotating speed can make the centrifugal force of weight increase rapidly; Quality through the adjustment weight and with the distance of sharf, motor is limited under certain rotating speed, effectively controlled the generation of generator runaway accident; Reach the purpose that limits generator speed; When high wind, also can normally move generating, needn't artificially brake or the parking of deflection head, improve wind energy utilization.When strong gusts of wind was arranged, suitably the fan blade of biasing can be because the synchronous deflection several angle of effect of strong wind weakens the impulse force of strong gusts of wind equally, and the protection fan blade can not fracture.

Description of drawings:

Fig. 1 is the structural representation under the positive state of rest of the utility model, and all the other fan blades of part of only drawing a slice fan blade among the figure omit.

Fig. 2 is the structural representation that the utility model state of rest downside is analysed and observe.

Fig. 3 is that the utility model is positive, the maximal work positional structure schematic representation when propeller pitch angle is adjusted to maximum, and all the other fan blades of part of only drawing a slice fan blade among the figure omit.

Fig. 4 is the utility model propeller pitch angle structural representation that analyse and observe the side when being adjusted to the greatest limit working position.

Embodiment:

(Fig. 1) weight 7 is for organize number with paddle and evenly distribute equally; Weight 7 can be made up of the polylith metal, so that adjust its weight as required, weight 7 is fixed on an end of screw mandrel 11 by (Fig. 2) nut 12; The other end of screw mandrel 11 is fixed on the sharf 4; (Fig. 3) synchromesh gear 10 is fixed on the sharf 4 and meshes with the ring tooth that encloses synchronously on 17, encloses 17 synchronously and is enclosed within on the positive aperture of wind wheel dish 1, and reduction torsion spring 14 is enclosed within on the sharf 4; One is pressed on the support 15 that is fixed on the wind wheel dish 1, and screw mandrel 11 is hooked in the other end.

During work, fan blade 2 stressed beginning that facing the wind rotated, and at this moment, the propeller pitch angle of fan blade 2 is initial propeller pitch angle, and when wind speed becomes big when surpassing the proper functioning wind speed, the power that fan blade 2 obtains strengthens, and wind wheel dish 1 rotating speed increases; At this moment, weight 7 rotate with wind wheel dish 1 synchronously, because square being directly proportional of the centrifugal force of rotation generation and rotating speed; So the centrifugal force that this moment, weight 7 rotations were produced increases sharply; This centrifugal force turns an angle sharf 4 through the active force that screw mandrel 11 overcomes reduction torsion spring 14, makes fan blade 2 propeller pitch angles become big, has reduced the wind-exposuring area of fan blade 2; Fan blade 2 stressed reducing, rotating speed descends and is equilibrated under the metastable rotating speed.When wind speed decreased, fan blade 2 is stressed to reduce to make wind wheel dish 1 rotating speed to descend, and the centrifugal force that weight 7 produces diminishes; Under the effect of reduction torsion spring 14, reset, fan blade 2 propeller pitch angles diminish, and the wind-exposuring area of fan blade 2 increases; Wind wheel dish 1 rotating speed is increased, is fixed on synchromesh gear 10 deflections simultaneously on the sharf 4, thus through with the restriction of the synchronous circle 17 of synchromesh gear 10 engagements; Guarantee that each sharf 4 rotates synchronously, makes the propeller pitch angle of each fan blade 2 be consistent.During work, no matter be that wind speed changes or generator load changes wind wheel dish 1 change in rotational speed that causes, under the effect of this mechanism, can both make the rotating speed of generator become steady relatively, the output voltage fluctuation is less.

Claims

1. the centrifugal accent oar of small-sized wind power generator smooth rate apparatus; Mainly form by sharf (4), synchromesh gear (10), wind wheel dish (1), synchronous circle (17), screw mandrel (11), weight (7), torsion spring (14) and support (15); The overhanging end of sharf (4) is fan blade (2) fixedly; Middle part cover torsion spring (14) and synchromesh gear (10), each synchromesh gear (10) and synchronous circle (17) engagement that is enclosed within on the axle of wind wheel dish (1) hole, weight (7) also is installed on the sharf (4) through screw mandrel (11); It is characterized in that the synchromesh gear (10) that is set with on the hole axle of wind wheel dish (1) on synchronous circle (17) and each sharf (4) meshes respectively.

2. by the centrifugal accent oar of the described small-sized wind power generator of claim 1 smooth rate apparatus, it is characterized in that, be fixed with synchromesh gear (10) on the described sharf (4), be fixed with weight (7) through screw mandrel (11) in the above, weight (7) is made up of metal.

3. by claim 1 or the centrifugal accent oar of 2 described small-sized wind power generators smooth rate apparatus, be enclosed within torsion spring (14) one end hooks on the sharf (4) on screw mandrel (11), the other end is blocked by support (15) and wind wheel dish (1).