CN201947111U - Centrifugal automatic speed-limiting device for wind driven generator - Google Patents
Centrifugal automatic speed-limiting device for wind driven generator Download PDFInfo
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- CN201947111U CN201947111U CN2011200043691U CN201120004369U CN201947111U CN 201947111 U CN201947111 U CN 201947111U CN 2011200043691 U CN2011200043691 U CN 2011200043691U CN 201120004369 U CN201120004369 U CN 201120004369U CN 201947111 U CN201947111 U CN 201947111U
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- centrifugal
- generator
- spider
- fixed
- automatic speed
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Abstract
The utility model discloses a centrifugal automatic speed-limiting device for a wind driven generator, which comprises a center plate. The center plate is sleeved on a rotor shaft of the generator, a fixed shaft is arranged on a plate surface of the center plate, one end of a centrifugal sliding block is sleeved on the fixed shaft and capable of rotating around the fixed shaft, and the outer lateral side of the other end of the centrifugal sliding block is provided with a friction piece. One end of a back-moving spring is fixed on the center plate, and the other end of the back-moving spring is fixed on the centrifugal sliding block. A cylindrical friction plate with a friction inner lateral side is fixed on the rear end cover of the generator and the center plate is arranged inside a cavity of the friction plate. The device is suitable for small and medium sized generators and has the advantages of being gentle in braking, capable of reducing maintaining cost, simple in structure, reliable in braking and convenient to assemble and disassemble, and the like.
Description
Technical field
The utility model relates to a kind of centrifugal automatic speed limit device, especially a kind of centrifugal automatic speed limit device that is used for wind-driven generator.
Background technology
Wind energy is the energy of a kind of safe, cleaning, environmental protection.At present, the main mode of human use's wind-force is a wind power generation.Wind-driven generator is a kind ofly to utilize wind-force to drive generator and with the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of wind energy transformation for electric energy.Because the size of wind-force has unsteadiness, can cause blade rotational speed too high, when blade rotational speed is higher than desin speed, phenomenons such as leaf destruction can take place, and destroy wind-driven generator when wind-force is excessive.When perhaps wind-driven generator ran into hurricane or whirlwind, the rotating speed of blade will increase rapidly, thereby destroyed blade and inverter controller.Thereby, speed-limiting device usually is set, with the rotating speed of limit blade on wind-driven generator.In prior art, hand-operated brake, empennage inclined to one side side control speed and electromagnetic brake or the like speed limit mode is arranged.Adopt the mode of hand-operated brake to need the long-term guard on duty of staff, can only rely on rope on the empennage to avoid wind direction when wind is big and reach the fast parking purpose of control, automaticity is low.When adopting the mode of the inclined to one side side control of empennage speed, generally be after the hypervelocity several seconds brake to be arranged just at wind-driven generator, it is slow in reacting to brake, cause inverter controller to burn out easily, and body vibration is violent during brake, the phenomenon that complete machine can take place acutely to rock, less stable.Application number is speed limit, the brake gear that 200810019906.2 Chinese invention patent discloses a kind of wind-driven generator, comprise controller, electromagnetic brake mechanism, electromagnetic retarder and inductor, this electromagnetic brake mode needs controller of fan to provide power supply for brake gear, reduce the rotating speed of blade by the mode of suction type electromagnetic brake mechanism moment adhesive, brake is swift and violent relatively suddenly, parts such as easy damaged blade, and phenomenons such as coil burnout take place easily, and complex structure, equipment cost is than higher.
The utility model content
The utility model is the weak point that exists in the above-mentioned prior art for avoiding, and a kind of centrifugal automatic speed limit device that is used for wind-driven generator is provided, and damages the generator parts to avoid fierce braking, reduces wind-driven generator maintenance maintenance cost.
The utility model be the technical solution problem by the following technical solutions.
The centrifugal automatic speed limit device that is used for wind-driven generator, its design feature is, comprise spider, spider is sheathed on the armature spindle of generator, the card of spider is provided with fixed axis, one end of centrifugal slider is sheathed on the fixed axis and can rotates around fixed axis, and the lateral surface of the centrifugal slider other end is provided with friction plate; One end of back-moving spring is fixed on the spider, and the other end of back-moving spring is fixed on the end that is provided with friction plate of centrifugal slider; Medial surface is that the cylindric frictional disk of rubbing surface is fixed on the rear end cap of generator, and spider is arranged in the inner chamber of frictional disk.
The design feature that is used for the centrifugal automatic speed limit device of wind-driven generator of the present utility model also is:
Described frictional disk by screw on the rear end cap of generator.
Described spider is fixed on the armature spindle of generator by axle key.
Described spider by screw on the armature spindle of generator.
Circumferentially be provided with a plurality of centrifugal sliders on the card of described spider evenly and at intervals.
Circumferentially be provided with 3 centrifugal sliders on the card of described spider evenly and at intervals.
One end of described frictional disk is connected with the rear end cap of generator, and button is provided with cover plate on the end face of the other end.
Adopt screw that described cover plate is fixed on the frictional disk.
Offer a plurality of louvres on the described cover plate.
Compared with the prior art, the utility model beneficial effect is embodied in:
Armature spindle one end of wind-driven generator is connected with sharf, and the other end is installed speed-limiting device of the present utility model.After starting working under the effect of wind-driven generator at wind-force, armature spindle begins high speed rotating under the drive of blade, be fixed on spider on the armature spindle along with the armature spindle high speed rotating, centrifugal slider on the spider is under action of centrifugal force, the trend of radially outward moving along spider is arranged, but because an end of centrifugal slider is enclosed within on the fixed axis, the other end is under the effect of the pulling force of back-moving spring, and the position of centrifugal slider does not change.After the rotating speed of armature spindle surpasses certain speed, increase along with the velocity of rotation of armature spindle, centrifugal slider begins to rotate around fixed axis, centrifugal slider is provided with an end (end that promptly the connects back-moving spring) beginning of friction plate and outwards moves, back-moving spring also is elongated, and provides enough centripetal force until the pulling force of back-moving spring for centrifugal slider.Thereby the length of back-moving spring is along with the speed of armature spindle increases and progressively increases.Along with the increase of wind-force, the speed of armature spindle also can increase; After the speed of armature spindle increases to critical speed, the length of back-moving spring also reaches critical length, this moment, centrifugal slider departed from initial position, the friction plate that is positioned at the centrifugal slider outside begins to contact with the rubbing surface of frictional disk gradually, produce the braking force that stops the centrifugal slider rotation thus, the braking force that just stops armature spindle and spider to rotate.The speed of armature spindle is big more, and the friction plate of centrifugal slider is also big more to the pressure of frictional disk, and consequent braking force is also just big more.So braking force is along with the increase of the speed of armature spindle increases, thereby the speed of armature spindle is limited within certain scope, promptly wind-force is big more, and the braking force that speed-limiting device produces is also big more.After the speed of armature spindle reduced, back-moving spring retracted centrifugal slider again gradually, and braking force reduces gradually until disappearance.
Speed-limiting device of the present utility model; be gradually braking force to be increased and reduce the rotating speed of armature spindle and blade; thereby braking maneuver is softer; fierce braking can not take place and the phenomenon of damage generator parts; can protect generator preferably; prolong the useful life of the various parts of generator, reduce the cost of maintenance and repair.Speed-limiting device of the present utility model, only adopt parts such as spider, centrifugal slider, friction plate, back-moving spring and frictional disk can realize the flexible braking of wind-driven generator hypervelocity, by screw, axle key etc. each parts is installed on the generator, simple in structure, low cost of manufacture need not electric equipment, the reliable and easy accessibility of braking, thereby can guarantee the normal operation of wind-driven generator, improve the generating efficiency of generator.
The utility model is particularly useful for middle-size and small-size wind-driven generator.
Description of drawings
Fig. 1 is used for the cutaway view of the centrifugal automatic speed limit device of wind-driven generator for the utility model.
Fig. 2 is in the schematic diagram of non-deboost phase for centrifugal automatic speed limit device of the present utility model.
Fig. 3 is in the schematic diagram of deboost phase for centrifugal automatic speed limit device of the present utility model.
Fig. 4 is the structure of cover plate schematic diagram of centrifugal automatic speed limit device of the present utility model.
Fig. 5 is the structural representation that is provided with the wind-driven generator of the centrifugal automatic speed limit device of the utility model.
Label in accompanying drawing 1~accompanying drawing 5: armature spindle 1, casing 2, spider 3, centrifugal slider 4, frictional disk 5, cover plate 6, louvre 61, screw 7, fixed axis 8, wind-driven generator 9, centrifugal automatic speed limit device 10, friction plate 11, back-moving spring 12.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment
Referring to Fig. 1~Fig. 5, the centrifugal automatic speed limit device 10 that is used for wind-driven generator 9, comprise spider 3, spider 3 is sheathed on the armature spindle 1 of generator, the card of spider 3 is provided with fixed axis 8, one end of centrifugal slider 4 is sheathed on the fixed axis 8 and can rotates around fixed axis 8, and the lateral surface of centrifugal slider 4 other ends is provided with friction plate 11; One end of back-moving spring 12 is fixed on the spider 3, and the other end of back-moving spring 12 is fixed on the end that is provided with friction plate 11 of centrifugal slider 4; Medial surface is that the cylindric frictional disk 5 of rubbing surface is fixed on the rear end cap 8 of generator, and spider 3 is arranged in the inner chamber of frictional disk 5.Described frictional disk 5 is fixed on the rear end cap 8 of generator by screw 7.Described spider 3 by axle key or screw on the armature spindle 1 of generator.Circumferentially be provided with a plurality of centrifugal sliders 4 on the card of described spider 3 evenly and at intervals, preferably be set to 3 centrifugal sliders 4.One end of described frictional disk 5 is connected with the rear end cap 8 of generator, and button is provided with cover plate 6 on the end face of the other end, so that each parts are sealed in the inner chamber of frictional disk 5.Adopt screw that described cover plate 6 is fixed on the frictional disk 5.Offer a plurality of louvres 61 on the described cover plate 6.
The armature spindle 1 of wind-driven generator is positioned within the casing 2, and armature spindle 1 one ends are connected with sharf, and the other end is installed speed-limiting device of the present utility model (as shown in Figure 1).After starting working under the effect of wind-driven generator at wind-force, armature spindle begins high speed rotating under the drive of blade, be fixed on spider on the armature spindle along with the armature spindle high speed rotating, centrifugal slider on the spider is under action of centrifugal force, the trend of radially outward moving along spider is arranged, but because an end of centrifugal slider is enclosed within on the fixed axis, the other end is under the effect of the pulling force of back-moving spring, and the position of centrifugal slider does not change.After the rotating speed of armature spindle surpasses certain speed, increase along with the velocity of rotation of armature spindle, centrifugal slider begins to rotate around fixed axis, centrifugal slider is provided with an end (end that promptly the connects back-moving spring) beginning of friction plate and outwards moves, back-moving spring also is elongated, and provides enough centripetal force until the pulling force of back-moving spring for centrifugal slider.Thereby the length of back-moving spring is along with the speed of armature spindle increases and progressively increases.Along with the increase of wind-force, the speed of armature spindle also can increase; After the speed of armature spindle increases to critical speed, the length of back-moving spring also reaches critical length, this moment, centrifugal slider departed from initial position, the friction plate that is positioned at the centrifugal slider outside begins to contact with the rubbing surface of frictional disk gradually, produce the braking force that stops the centrifugal slider rotation thus, the braking force that just stops armature spindle and spider to rotate.The speed of armature spindle is big more, and the friction plate of centrifugal slider is also big more to the pressure of frictional disk, and consequent braking force is also just big more.So braking force is along with the increase of the speed of armature spindle increases, thereby the speed of armature spindle is limited within certain scope, promptly wind-force is big more, and the braking force that speed-limiting device produces is also big more.After the speed of armature spindle reduced, back-moving spring retracted centrifugal slider again gradually, and braking force reduces gradually until disappearance.
Speed-limiting device of the present utility model; be gradually braking force to be increased and reduce the rotating speed of armature spindle and blade; thereby braking maneuver is softer; fierce braking can not take place and the phenomenon of damage generator parts; can protect generator preferably; prolong the useful life of the various parts of generator, reduce the cost of maintenance and repair.Speed-limiting device of the present utility model, only adopt parts such as spider, centrifugal slider, friction plate, back-moving spring and frictional disk can realize the flexible braking of wind-driven generator hypervelocity, by screw, axle key etc. each parts is installed on the generator, simple in structure, low cost of manufacture need not electric equipment, the reliable and easy accessibility of braking, thereby can guarantee the normal operation of wind-driven generator, improve the generating efficiency of generator.
The utility model is particularly useful for middle-size and small-size wind-driven generator.
Claims (9)
1. the centrifugal automatic speed limit device that is used for wind-driven generator, it is characterized in that, comprise spider (3), spider (3) is sheathed on the armature spindle (1) of generator, the card of spider (3) is provided with fixed axis (8), one end of centrifugal slider (4) is sheathed on the fixed axis (8) and can rotates around fixed axis (8), and the lateral surface of centrifugal slider (4) other end is provided with friction plate (11); One end of back-moving spring (12) is fixed on the spider (3), and the other end of back-moving spring (12) is fixed on the end that is provided with friction plate (11) of centrifugal slider (4); Medial surface is that the cylindric frictional disk (5) of rubbing surface is fixed on the rear end cap (8) of generator, and spider (3) is arranged in the inner chamber of frictional disk (5).
2. centrifugal automatic speed limit device according to claim 1 is characterized in that, described frictional disk (5) is fixed on the rear end cap (8) of generator by screw (7).
3. centrifugal automatic speed limit device according to claim 1 is characterized in that, described spider (3) is fixed on the armature spindle (1) of generator by axle key.
4. centrifugal automatic speed limit device according to claim 1 is characterized in that, described spider (3) by screw on the armature spindle (1) of generator.
5. centrifugal automatic speed limit device according to claim 1 is characterized in that, circumferentially is provided with a plurality of centrifugal sliders (4) on the card of described spider (3) evenly and at intervals.
6. centrifugal automatic speed limit device according to claim 5 is characterized in that, circumferentially is provided with 3 centrifugal sliders (4) on the card of described spider (3) evenly and at intervals.
7. centrifugal automatic speed limit device according to claim 1 is characterized in that, an end of described frictional disk (5) is connected with the rear end cap (8) of generator, and button is provided with cover plate (6) on the end face of the other end.
8. centrifugal automatic speed limit device according to claim 7 is characterized in that, adopts screw that described cover plate (6) is fixed on the frictional disk (5).
9. according to claim 7 or the described centrifugal automatic speed limit device of claim 8, it is characterized in that, offer a plurality of louvres (61) on the described cover plate (6).
Priority Applications (1)
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CN2011200043691U CN201947111U (en) | 2011-01-07 | 2011-01-07 | Centrifugal automatic speed-limiting device for wind driven generator |
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CN2011200043691U CN201947111U (en) | 2011-01-07 | 2011-01-07 | Centrifugal automatic speed-limiting device for wind driven generator |
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CN2011200043691U Expired - Fee Related CN201947111U (en) | 2011-01-07 | 2011-01-07 | Centrifugal automatic speed-limiting device for wind driven generator |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104485776A (en) * | 2014-12-28 | 2015-04-01 | 武汉联创恒业科技有限公司 | Automatic speed limiting motor and crane |
CN106329983A (en) * | 2015-06-17 | 2017-01-11 | 北京纳米能源与系统研究所 | Friction nanometer generator capable of automatically switching working modes, and power generation method |
CN106989121A (en) * | 2017-05-05 | 2017-07-28 | 沈阳建筑大学 | It is mechanical to rotate limiter of speed |
CN107763367A (en) * | 2017-11-16 | 2018-03-06 | 北华大学 | Screw drives centrifugal mechanical adaptive speed device |
CN109173137A (en) * | 2018-09-27 | 2019-01-11 | 李田 | It is a kind of can two-way speed limiting Handle of skipping rope and its application method |
CN109869272A (en) * | 2019-04-22 | 2019-06-11 | 杭州奇伶服饰有限公司 | A kind of wind-driven generator equipment |
CN111686946A (en) * | 2020-06-22 | 2020-09-22 | 邵祥 | Biological cell centrifuge speed limiting assembly and application thereof |
WO2023108613A1 (en) * | 2021-12-17 | 2023-06-22 | 华能汕尾风力发电有限公司 | Small wind turbine |
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2011
- 2011-01-07 CN CN2011200043691U patent/CN201947111U/en not_active Expired - Fee Related
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104485776A (en) * | 2014-12-28 | 2015-04-01 | 武汉联创恒业科技有限公司 | Automatic speed limiting motor and crane |
CN104485776B (en) * | 2014-12-28 | 2016-09-14 | 武汉联创恒业科技有限公司 | Automatic speed-limiting motor and crane |
CN106329983A (en) * | 2015-06-17 | 2017-01-11 | 北京纳米能源与系统研究所 | Friction nanometer generator capable of automatically switching working modes, and power generation method |
CN106329983B (en) * | 2015-06-17 | 2020-03-31 | 北京纳米能源与系统研究所 | Friction nanometer generator capable of automatically switching working modes and power generation method |
CN106989121A (en) * | 2017-05-05 | 2017-07-28 | 沈阳建筑大学 | It is mechanical to rotate limiter of speed |
CN107763367A (en) * | 2017-11-16 | 2018-03-06 | 北华大学 | Screw drives centrifugal mechanical adaptive speed device |
CN107763367B (en) * | 2017-11-16 | 2023-08-01 | 北华大学 | Spiral driving centrifugal mechanical self-adaptive speed regulating device |
CN109173137A (en) * | 2018-09-27 | 2019-01-11 | 李田 | It is a kind of can two-way speed limiting Handle of skipping rope and its application method |
CN109869272A (en) * | 2019-04-22 | 2019-06-11 | 杭州奇伶服饰有限公司 | A kind of wind-driven generator equipment |
CN111686946A (en) * | 2020-06-22 | 2020-09-22 | 邵祥 | Biological cell centrifuge speed limiting assembly and application thereof |
WO2023108613A1 (en) * | 2021-12-17 | 2023-06-22 | 华能汕尾风力发电有限公司 | Small wind turbine |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20130107 |
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CF01 | Termination of patent right due to non-payment of annual fee |