CN2782976Y

CN2782976Y - Automatic vane adjusting speed limiter for small wind driven power generator

Info

Publication number: CN2782976Y
Application number: CNU2005200696688U
Authority: CN
Inventors: 曹海珠
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-07
Filing date: 2005-01-07
Publication date: 2006-05-24
Anticipated expiration: 2015-01-07

Abstract

The utility model relates to an automatic vane adjusting speed limiter for small wind force generator, which comprises a blade, a wind wheel and a wheel plate with conical teeth, wherein the wheel plate is sheathed on the axial diameter of the back surface of the wind wheel. The utility model is characterized in that the axial diameter of the front surface of the wind wheel is sheathed with a linkage plate which is at least connected with two heavy bobs. The utility model has simple and reliable structure. Centrifugal force provided by the rotating heavy bobs can be used to obtain the purpose of controlling the rotating speed of the wind blade and limiting the rotating speed of the generator. The over speed accident of the generator is effectively controlled. Meanwhile, the rotating inertia of the heavy bobs enables the change of the rotating speed of the generator caused by the change of wind speed or generator load is buffered to enable the fluctuation of the output voltage of the generator to be small.

Description

Small-sized wind power generator is transferred the oar speed limiting device automatically

Technical field:

The utility model relates to the wind power plant field, is used for small-sized wind power generator, according to generator shaft change in rotational speed and change of wind velocity, adjusts the propeller pitch angle of wind wheel blade automatically and limits the high workload rotating speed of wind-driven generator.

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, therefore, the propeller pitch angle of blade immobilizes, the blade wind loading rating of this generator simple in structure is poor, meets to surpass the strong wind that allows work wind speed and need by producer's requirement blower fan that fell in advance, otherwise the blade frangibility.For this reason I in first to file " the blade pitch angle automatic regulating apparatus of small-sized wind power generator " (Chinese patent application number: 200420062921.2), this device is by blade, sharf, component such as wind wheel constitute, sharf one end is fixed on a side of width of blade direction, the other end and one spacing, returning device links to each other, sharf is fixed on the wind wheel by axle bed, when wind-force acts on the blade, blade pass is crossed sharf and is driven the wind driven generator principal shaft rotation, when wind speed surpasses the proper functioning wind speed, sharf can be at the axle bed intort because of the effect of wind-force, thereby adjust the propeller pitch angle of blade, the angle that sharf reverses is by spacing, returning device control, along with the increasing of wind-force, the angle of blade twist increases, until the angle of reversing is 90 degree, and this moment, the blade face and the wind direction of blade were substantially parallel; Along with the blade twist angle is the variation of propeller pitch angle, the power that makes its rotation that blade obtains changes thereupon, adjusts the rotating speed of generator shaft and realizes the purpose that blade need not fall when meeting strong wind with this.Though this structure can be adjusted the propeller pitch angle of blade automatically according to the size of wind-force, can guarantee fan operation when wind speed exceeds the proper functioning wind speed, blower fan need not fall, but when wind speed is unstable, blade rotational speed changes greatly, causes the generator speed shakiness, and the output voltage fluctuation is bigger; Also have when the load of generator diminishes suddenly, when the fluctuation of generator speed shakiness, output voltage is big, generator shaft can make wind wheel, fan blade rotating speed become big suddenly, and generator even the driving phenomenon can take place when serious brings big hidden danger to unit safety operation.

Summary of the invention:

The purpose of this utility model is that a kind of stable and small-sized wind power generator that can limit the generator maximum speed of wind-driven generator rotating speed that makes of design is transferred the oar speed limiting device 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, cone gear, wind wheel, the wheel disc of band awl tooth, caging bolt and returning pull-spring, sharf one end and blade are connected, the other end and cone gear are connected, be enclosed within on the back side diameter of axle of wind wheel with the wheel disc of cone gear engagement, caging bolt is arranged on the wheel disc, the arc spacing hole is arranged on the wind wheel, and an end of returning pull-spring is connected on the caging bolt, and the other end is connected on the wind wheel, it is characterized in that, be with the interlock dish on the front diameter of axle of wind wheel, interlock dish and wheel disc are affixed, connect two weights on the interlock dish at least, rely on the centrifugal force that weight produces when rotating, control interlock dish rotates, and by the parts such as wheel disc that are attached thereto fan blade is rotated, and adjusts the propeller pitch angle of fan blade synchronously.

The utility model has the advantages that, simple in structure, reliable, do not needing to provide under the situation of external force, by the centrifugal force that weight provided that rotates, thereby can adjust the purpose that fan blade propeller pitch angle, control fan blade rotating speed reach the control generator speed easily.Because weight has certain weight, bigger inertia is arranged in the rotation, so when wind speed was unstable, the fan blade change in rotational speed must overcome the inertia of weight, therefore, change in rotational speed obtain the buffering of " inertia " and become mild; Equally, when generator load changes suddenly and when causing that generator speed changes suddenly, rotation speed change also can because of this " inertia " becomes mild, make fluctuation change less of voltage.The centrifugal force that weight is produced when rotating, with square being directly proportional of rotating speed, therefore, the increase of rotating speed can make the centrifugal force of weight increase rapidly, by the weight of adjustment weight and the pulling force of returning pull-spring, just can be limited under certain rotating speed, the centrifugal force that weight produced makes propeller pitch angle be adjusted to 90 degree, do not reentry power and can't overspeed operation of fan blade has effectively been controlled the generation of generator runaway accident, reaches the purpose that limits generator speed.

Description of drawings:

Fig. 1 is the structural representation of the utility model side, the fan blade that only draws among the figure, and all the other fan blades omit.

Fig. 2 is the structural representation under the utility model front, the normal working.

Fig. 3 is that the utility model front, propeller pitch angle are adjusted to 90 maximal work positional structure schematic representation when spending.

Embodiment:

Weight 50 is at least two and evenly distribution, weight 50 is made of the polylith metal dish, so that adjust its weight as required, weight 50 is through an end of pull bar 52 and fastening by nut, the other end of pull bar 52 and draw-bar seat 53 are affixed, it is 30 hinged that draw-bar seat 53 and interlock are coiled, and pull bar sliding support 51 is enclosed within on the pull bar 52, and pull bar sliding support 51 is hinged on the wind wheel 10; Interlock dish 30 is enclosed within on the front diameter of axle 14 of wind wheel 10, and wheel disc 20 is enclosed within on the back side diameter of axle 12 of wind wheel 10, and the taper connection hole 15 of wind wheel 10 and generator shaft cooperate affixed; Caging bolt 21 passes that the spacing arcuate socket 13 of wind wheel 10 is affixed with interlock dish 30 and wheel disc 20, and returning pull-spring 70 1 ends are connected on the caging bolt 21, and the other end is connected on the screw 16 on the wind wheel 10; During work, fan blade 42 stressed beginning that facing the wind rotated, and at this moment, the propeller pitch angle of fan blade 42 is initial propeller pitch angle, and caging bolt 21 is at the top of wind wheel 10 arc spacing holes 13, and when wind speed becomes big when surpassing the proper functioning wind speed, the power that fan blade 42 obtains strengthens, and rotating speed increases; At this moment, weight 50 and fan blade 42 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 50 rotations were produced increases sharply, this centrifugal force acts on the draw-bar seat 53 by pull bar 52 and pull bar sliding support 51, make draw-bar seat 53 drive interlock dish 30 and take turns the rotation of 10 sense of rotation against the wind, caging bolt 21 leaves the top of arc spacing hole 13, driving wheel disc 20 rotates, and by bevel gear 41, blade shaft 40 rotates fan blade 42, adjust the propeller pitch angle of fan blade 42, fan blade 42 stressed reducing, rotating speed descends and is equilibrated under the metastable rotating speed, when wind speed bigger, or even impact fitful wind, when fan blade 42 rotating speeds reach the maximum speed of setting, the centrifugal force that weight 50 produces makes interlock dish 30 turn to limit position, this moment, caging bolt 21 was displaced to the terminal of arc spacing hole 13 on the wind wheel 10, about fan blade 42 rotations this moment 90 degree, blade face fundamental sum wind direction is parallel, the power that blade 42 obtains to rotate is zero substantially, fan blade 42 rotating speeds descend, and reach new balance; During wind speed decreased, fan blade 42 rotating speeds descend, and the centrifugal force that weight 50 produces diminishes, under the effect of returning pull-spring 70, and fan blade 42 angle rotaries.During work, no matter be that wind speed changes or generator load changes fan blade 42 change in rotational speed that cause, all must overcome the inertia that weight 50 rotates, the influence of this inertia makes the rotating speed of generator become steady relatively, and the output voltage fluctuation is less.For making the cooperation easy-regulating more between returning pull-spring 70 and the weight 50, between interlock dish 30 and the wind wheel 10 torsion spring 60 can be set, one end of torsion spring 60 is stuck on the set screw 11 on the wind wheel 10, the other end is stuck in the groove of opening on the interlock dish 30 54, be the convenient size of adjusting torsion, the groove 54 on the interlock dish 30 has 3 at least.

Claims

1, a kind of small-sized wind power generator is transferred the oar speed limiting device automatically, comprise blade (42), sharf (40), cone gear (41), wind wheel (10), the wheel disc (20) of band awl tooth, caging bolt (21) and returning pull-spring (70), sharf (40) one ends and blade (42) are connected, the other end and cone gear (41) are connected, be enclosed within on the back side diameter of axle (12) of wind wheel (10) with the wheel disc (20) of cone gear (41) engagement, caging bolt (21) is arranged on the wheel disc (20), arc spacing hole (13) is arranged on the wind wheel (10), one end of returning pull-spring (70) is connected on the caging bolt (21), the other end is connected on the screw (16) on the wind wheel (10), it is characterized in that, be with interlock dish (30) on the front diameter of axle (14) of wind wheel (10), interlock dish (30) is affixed with wheel disc (20), connects two weights (50) on the interlock dish (30) at least.

2, transfer the oar speed limiting device automatically by the described small-sized wind power generator of claim 1, it is characterized in that, described weight (50) is at least two and evenly distribution, weight (50) is made of the polylith metal dish, weight (50) is through an end of pull bar (52) and fastening by nut, and the other end of pull bar (52) and draw-bar seat (53) are affixed, and draw-bar seat (53) is hinged with interlock dish (30), pull bar sliding support (51) is enclosed within on the pull bar (52), and pull bar sliding support (51) is hinged on (10) on the wind wheel; It is affixed with wheel disc (20) and interlock dish (30) that caging bolt (21) passes the spacing arcuate socket (13) of wind wheel (10).

3, transfer the oar speed limiting device automatically by claim 1 or 2 described small-sized wind power generators, it is characterized in that, between described interlock dish (30) and the wind wheel (10) torsion spring (60) can be set, one end of torsion spring (60) is stuck on the set screw (11) on the wind wheel (10), the other end is stuck in the groove of opening on the interlock dish (30) (54), and the groove on the interlock dish (54) has 3 at least.