CN201474857U

CN201474857U - Automatic pitch angle and speed stabilization device for small wind turbines

Info

Publication number: CN201474857U
Application number: CN2009201510059U
Authority: CN
Inventors: 章红涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-25
Filing date: 2009-04-25
Publication date: 2010-05-19
Anticipated expiration: 2019-04-25

Abstract

A small wind power generator automatic pitch angle and speed stabilization device, including blade shaft, small bevel gear, wind wheel disc, synchronous transmission large bevel gear with external circular teeth, centrifugal weight, centrifugal deflection transmission gear and return torsion spring . The feature is that the same number of centrifugal deflection transmission gears as the wind blades are arranged on the front of the wind wheel disc to mesh with the synchronous transmission large bevel gears on the shaft diameter, and each centrifugal deflection transmission gear is equipped with a set of heavy hammers. The utility model has a simple and reliable structure. When rotating, the centrifugal force of the heavy hammer and the resetting torsion spring act together to keep the blade at a more suitable pitch angle under various wind speeds and loads. Through the centrifugal force provided by the rotating weight, the purpose of controlling the torque of the fan blade and stabilizing the speed can be achieved, effectively preventing the occurrence of the generator overrun accident. Reduce the impact of wind speed or generator load changes on the generator speed, so that the generator output voltage fluctuations are small.

Description

Small-sized wind power generator is transferred the propeller pitch angle smooth rate apparatus automatically

Technical field:

The utility model relates to the wind power plant field, be mainly used in small-sized wind power generator, according to the variation of change of wind velocity and generator speed, impact and constant wind power generator that the propeller pitch angle of adjusting wind wheel blade automatically reduces high wind are operated in the speed range of regulation.

Background technique:

The existing horizontal axis design of mini wind-driven generator that adopts below 5 kilowatts, its generator shaft is parallel to wind direction, 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 by producer's requirements generation outage of braking, damage or blade broken otherwise generator easily exceeds the speed limit.

Summary of the invention:

The purpose of this utility model is that a kind of small-sized wind power generator that wind-driven generator is operated under the regulation rotating speed more stably of design is transferred the propeller pitch angle smooth rate apparatus automatically.

The scheme of the utility model technical solution problem is, a kind of small-sized wind power generator is transferred the oar speed limiting device automatically, comprise blade, sharf, small conical gear, the wind wheel dish, the Synchronous Transmission large conical gear, centrifugal weight, centrifugal deflection driving gear and reduction torsion spring, sharf one end and blade are connected, the other end and small conical gear are connected, with the synchronous large conical gear of small conical gear engagement by bearing housing on the wind wheel dish, on the large conical gear edge driving cog is arranged synchronously, with the centrifugal deflection driving gear engagement on the wind wheel dish, weight drives centrifugal deflection driving gear by connecting rod and rotates under action of centrifugal force, reduction torsion spring resets blade when wind-force or motor speed decline.Weight and reduction torsion spring acting in conjunction make blade remain on more suitable propeller pitch angle.

It is characterized in that, be with bearing and Synchronous Transmission large conical gear on the front diameter of axle of wind wheel dish, centrifugal deflection driving gear engagement on large conical gear and the wind wheel dish and the same quantity of fan blade, fix a secondary weight by connecting rod on each centrifugal deflection driving gear, the centrifugal force that weight produces when relying on the wind wheel dish to rotate, rotate with the reduction torsion spring elastic force acting in conjunction control Synchronous Transmission large conical gear on each centrifugal deflection driving gear, and make fan blade rotate the propeller pitch angle of adjusting fan blade synchronously by being engaged with parts such as small conical gear.

The utility model has the advantages that, simple in structure, reliable, do not needing to provide under the situation of external force, the centrifugal force that is provided by weight deflection, thus can adjust the fan blade propeller pitch angle easily, change the purpose that generator torque 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, by the quality of adjustment weight and the elastic force of return torsion spring, 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, the fan blade part of only drawing among the figure, and all the other fan blades omit.

Fig. 2 is the structural representation that analyse and observe the utility model side.

Fig. 3 is the utility model front, the maximal work positional structure schematic representation when propeller pitch angle is adjusted to maximum.

Embodiment:

(Fig. 1) weight 5 is for organizing number equally with paddle and evenly distributing, weight 5 is made of the polylith metal, so that adjust its weight as required, weight 5 is fastening by the end that bolt 6 is fixed on connecting rod 9, the other end of connecting rod 9 is fixed on the deflection driving gear 3, tooth engagement on the cylindrical of deflection driving gear 3 and Synchronous Transmission large conical gear 7, Synchronous Transmission large conical gear 7 is enclosed within by (Fig. 2) bearing 17 on the positive aperture of wind wheel dish 2, small conical gear 10 engagements on awl tooth and the sharf 13.Return torsion spring 8 is enclosed within the no increment on the deflection driving gear 3, and one is pressed on sharf bearing 12 limits, and connecting rod 9 is hooked in the other end.

During work, fan blade 1 stressed beginning the down with the wind rotates, and at this moment, the propeller pitch angle of fan blade 1 is initial propeller pitch angle, and when wind speed became greatly above the proper functioning wind speed, the power of fan blade 1 acquisition strengthened, and wind wheel dish 2 rotating speeds increase; At this moment, weight 5 and wind wheel dish 2 rotate synchronously, because square being directly proportional of the centrifugal force that rotate to produce and rotating speed, so the centrifugal force that this moment, weight 5 rotations were produced increases sharply, this centrifugal force turns an angle deflection driving gear 3 by the active force that connecting rod 9 overcomes return torsion spring 8, drive Synchronous Transmission large conical gear 7 rotations with its engagement, thereby driving sharf 13 by small conical gear 10 turns an angle, make fan blade 1 propeller pitch angle become big, reduced the wind-exposuring area of fan blade 1, fan blade 1 stressed reducing, rotating speed descends and is equilibrated under the metastable rotating speed.When wind speed decreased, fan blade 1 is stressed to reduce to make wind wheel dish 2 rotating speeds to descend, and the centrifugal force that weight 5 produces diminishes, and under the effect of return torsion spring 8, fan blade 1 propeller pitch angle diminishes, and the wind-exposuring area of fan blade 1 increases, and wind wheel dish 2 rotating speeds are increased.During work, no matter be that wind speed changes or generator load changes the wind wheel dish change in rotational speed that causes, all make the rotating speed of generator become steady relatively under the effect of this mechanism, the output voltage fluctuation is less.

If fan blade 1 is installed as (Fig. 1) do suitable biasing, the infringement that strong gusts of wind may cause fan blade 1 and unit can also be eliminated by this mechanism.Principle is: do suitable biasing because fan blade 1 is installed, during strong gusts of wind, fan blade 1 overcomes the active force of return torsion spring 8 by sharf 13, small conical gear 10, Synchronous Transmission large conical gear 7, deflection driving gear 3, rotate synchronously rapidly and make fan blade 1 propeller pitch angle become big, reduced the wind-exposuring area of fan blade 1, weakened the impact of strong gusts of wind fan blade 1 and unit.

Claims

1. small-sized wind power generator is transferred the propeller pitch angle smooth rate apparatus automatically, by sharf (13), small conical gear (10), wind wheel dish (2), the large conical gear (7) of the outer Knucle-gear of band, cylinder driving gear (3), weight (5) and torsion spring (8) are formed, sharf (13) one ends are fan blade (1) fixedly, the other end and small conical gear (10) are connected, with large conical gear (7) engagement that is enclosed within by main bearing (17) on wind wheel dish (2) diameter of axle, it is characterized in that, centrifugal deflection driving gear (3) is housed on the wind wheel dish (2), weight (5) is fixed on the centrifugal deflection driving gear (3), is with the large conical gear (7) and centrifugal deflection driving gear (3) engagement of the outer Knucle-gear of band on wind wheel dish (2) diameter of axle by bearing (17).

2. transfer the propeller pitch angle smooth rate apparatus automatically by the described small-sized wind power generator of claim (1), it is characterized in that, it is last and consistent with the quantity of fan blade (1) that described centrifugal deflection driving gear (3) is installed in wind wheel dish (2) by the even distribution of axle (15), is fixed with weight (5) by connecting rod (9) in the above.

3. transfer the propeller pitch angle smooth rate apparatus automatically by claim (1) or (2) described small-sized wind power generator, weight (5) is made of the polylith metal, weight (5) is fixed on connecting rod (9) one ends by bolt (6), and connecting rod (9) the other end is fixed on above the centrifugal deflection driving gear (3) with bolt (14).

4. transfer the propeller pitch angle smooth rate apparatus automatically by claim (1) or (3) described small-sized wind power generator, be enclosed within torsion spring (8) one end hooks on the centrifugal deflection driving gear (3) on connecting rod (9), the other end is blocked by sharf bearing (12) or other mechanism.