CN109026531B - Variable pitch device of wind driven generator - Google Patents
Variable pitch device of wind driven generator Download PDFInfo
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- CN109026531B CN109026531B CN201810956103.3A CN201810956103A CN109026531B CN 109026531 B CN109026531 B CN 109026531B CN 201810956103 A CN201810956103 A CN 201810956103A CN 109026531 B CN109026531 B CN 109026531B
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- fixedly connected
- push rod
- rod
- casing
- triangular block
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- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 230000000670 limiting effect Effects 0.000 claims description 32
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010248 power generation Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0264—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
- F03D7/0268—Parking or storm protection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a variable pitch device of a wind driven generator, which comprises a casing, wherein a first rolling bearing is fixedly connected to the middle point of the right side of the inner wall of the casing, a hollow main shaft is movably connected inside the first rolling bearing, the right end of the hollow main shaft sequentially penetrates through the first rolling bearing and the casing from left to right and extends to the outside of the casing to be fixedly connected with a wind wheel disc, and a push rod is arranged on the right side of the wind wheel disc and corresponds to the hollow main shaft. According to the invention, the hollow main shaft, the wind wheel disc, the push rod, the triangular block, the baffle plate, the reset spring, the second rolling bearing, the threaded rod, the threaded sleeve, the pulley, the positive and negative motors, the positive and negative rotating shafts, the first bevel gear, the second bevel gear, the fixed plate, the bearing seat, the rotating block and the inserted rod are mutually matched, so that the effect of good pitch variation is achieved, all blades can be synchronously subjected to pitch variation, the stability and the power generation efficiency of the wind driven generator are improved, and the service life of the wind driven generator is also prolonged.
Description
Technical Field
The invention relates to the technical field of wind driven generators, in particular to a variable pitch device of a wind driven generator.
Background
The wind driven generator is a device for converting wind energy into electric energy, and mainly comprises blades, a generator, mechanical parts and electrical parts, and is mainly divided into a horizontal axis wind driven generator and a vertical axis wind driven generator according to different rotating shafts, the horizontal axis wind driven generator in the current market occupies the mainstream position, and the wind driven generator is protected while the wind energy utilization rate is improved, the wind driven generator is usually provided with a variable pitch device, the variable pitch device of the common wind driven generator is unsatisfactory in pitch effect, the variable pitch device is required to be independently arranged aiming at each blade, so that the economic cost is greatly increased, and the blades can not be synchronously changed when the blades are changed, the stability of the wind driven generator is influenced, the power generation efficiency of the wind driven generator is reduced, and the service life of the wind driven generator is shortened.
Disclosure of Invention
The invention aims to provide a variable pitch device of a wind driven generator, which has the advantage of good variable pitch effect and solves the problem that the variable pitch effect of the common variable pitch device of the wind driven generator is not ideal.
In order to achieve the purpose, the invention provides the following technical scheme: a variable pitch device of a wind driven generator comprises a casing, wherein a first rolling bearing is fixedly connected to the middle point on the right side of the inner wall of the casing, a hollow main shaft is movably connected inside the first rolling bearing, the right end of the hollow main shaft sequentially penetrates through the first rolling bearing and the casing from left to right and extends to the outside of the casing, a wind wheel disc is fixedly connected to the outside of the casing, a push rod is arranged on the right side of the wind wheel disc and corresponds to the hollow main shaft, the left end of the push rod sequentially penetrates through the wind wheel disc, the hollow main shaft and the casing from right to left and extends to the inside of the casing, a triangular block is fixedly connected to the surface of the push rod and is positioned between the triangular block and the hollow main shaft, the top and the bottom of the baffle are fixedly connected with the top and the bottom of the inner wall of the casing respectively, and a reset, one end of the reset spring close to the baffle is fixedly connected with the baffle, one end of the reset spring close to the triangular block is fixedly connected with the triangular block, the top and the bottom of the inner wall of the shell and the position on the left side of the triangular block are fixedly connected with second rolling bearings, the two second rolling bearings are movably connected through a threaded rod, the surface of the threaded rod and the position corresponding to the triangular block are in threaded connection with a threaded sleeve, the right side of the threaded sleeve is fixedly connected with a pulley matched with the triangular block for use, the top of the inner wall of the shell and the position corresponding to the pulley are fixedly connected with a positive and negative motor, an output shaft of the positive and negative motor is fixedly connected with a positive and negative rotating shaft, the left end of the positive and negative rotating shaft is fixedly connected with a first bevel gear, the surface of the threaded rod and the position corresponding to the first bevel gear are fixedly connected with a, the utility model discloses a blade bearing, including push rod, blade axle, bearing seat, blade axle, push rod, blade axle, blade surface and the rotatory piece of position fixedly connected with of corresponding rotatory piece, the fixed surface of fixed plate is connected with two bearing seats, through blade axle swing joint between two bearing seats, the one end that the push rod was kept away from to the blade axle runs through the bearing seat and extends to its outside fixedly connected with blade, the blade axle surface just is located the rotatory piece of position fixedly connected with between two bearing seats, the push rod surface just corresponds the position fixedly connected with inserted bar of rotatory piece, the one end.
Preferably, the left side symmetry of casing inner wall is provided with two limiting plates, the top and the limiting plate of thread bush contact each other.
Preferably, the top of the threaded sleeve and the position corresponding to the limiting plate are provided with a limiting rod, the bottom of the limiting rod penetrates through the threaded sleeve and extends to the outside of the threaded sleeve and is fixedly connected with the limiting plate, and the top of the limiting rod is fixedly connected with the limiting plate.
Preferably, the top of the rotating block is provided with a movable hole, and one end of the inserted link, which is close to the movable hole, penetrates through the movable hole and extends to the outside of the movable hole.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the first rolling bearing, the hollow main shaft, the wind wheel disc, the push rod, the triangular block, the baffle plate, the reset spring, the second rolling bearing, the threaded rod, the threaded sleeve, the pulley, the positive and negative motors, the positive and negative rotating shafts, the first bevel gear, the second bevel gear, the fixed plate, the bearing seat, the rotating block and the inserted rod are matched with each other, so that a good pitch control effect is achieved, each blade can be synchronously controlled, the stability and the power generation efficiency of the wind driven generator are improved, and the service life of the wind driven generator is also prolonged.
2. The limiting plate is arranged to limit the threaded sleeve and limit the movement range of the threaded sleeve, the limiting rod is arranged to limit the threaded sleeve, the threaded rod is prevented from driving the threaded sleeve to rotate together when rotating, the movable hole is arranged to limit the inserted rod, and the movement range of the inserted rod is limited.
3. The self-protection of the system can be realized by contracting the fan blades under the condition of ensuring the abnormal severe conditions while ensuring the self-adaptive angle adjustment of the fan blades within the normal wind power range.
4. The need set up among the prior art that significantly reduces and adjust and accomodate two kinds of structures and cause bulky simultaneously, promote generating set's security and operation convenience.
Drawings
FIG. 1 is a structural cross-sectional view in elevation of the present invention;
FIG. 2 is a structural cross-sectional view of the right side view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1.
In the figure: the wind wheel comprises a machine shell 1, a first rolling bearing 2, a hollow main shaft 3, a wind wheel disc 4, a push rod 5, a triangular block 6, a baffle 7, a return spring 8, a second rolling bearing 9, a threaded rod 10, a threaded sleeve 11, a pulley 12, a forward and reverse motor 13, a forward and reverse rotating shaft 14, a first bevel gear 15, a second bevel gear 16, a fixed plate 17, a bearing seat 18, a blade shaft 19, a blade 20, a rotating block 21, an inserted rod 22, a limiting plate 23, a limiting rod 24 and a movable hole 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment: referring to fig. 1-3, a variable pitch device of a wind driven generator comprises a housing 1, a first rolling bearing 2 is fixedly connected at the midpoint of the right side of the inner wall of the housing 1, a hollow main shaft 3 is movably connected inside the first rolling bearing 2, the right end of the hollow main shaft 3 sequentially penetrates through the first rolling bearing 2 and the housing 1 from left to right and extends to the outside of the housing 1 to be fixedly connected with a wind wheel disc 4, a push rod 5 is arranged at the right side of the wind wheel disc 4 and corresponds to the hollow main shaft 3, the left end of the push rod 5 sequentially penetrates through the wind wheel disc 4, the hollow main shaft 3 and the housing 1 from right to left and extends to the inside of the housing 1 to be fixedly connected with a triangular block 6, a baffle 7 is movably connected to the surface of the push rod 5 and is positioned between the triangular block 6 and the hollow main shaft 3, the top and the bottom of the baffle 7 are fixedly connected with the top and the bottom of the inner wall of the housing, one end of a return spring 8 close to the baffle 7 is fixedly connected with the baffle 7, one end of the return spring 8 close to the triangular block 6 is fixedly connected with the triangular block 6, the top and the bottom of the inner wall of the casing 1 and the position on the left side of the triangular block 6 are fixedly connected with second rolling bearings 9, the two second rolling bearings 9 are movably connected through a threaded rod 10, the surface of the threaded rod 10 and the position corresponding to the triangular block 6 are in threaded connection with a threaded sleeve 11, the left side of the inner wall of the casing 1 is symmetrically provided with two limiting plates 23, the top of the threaded sleeve 11 is in mutual contact with the limiting plates 23, the limiting plate 23 is arranged to play a role in limiting the threaded sleeve 11 and limit the movement range of the threaded sleeve 11, the top of the threaded sleeve 11 and the position corresponding to the limiting plate 23 are provided with a limiting rod 24, the bottom of the limiting rod 24 penetrates, the top of the limiting rod 24 is fixedly connected with a limiting plate 23, the limiting function of the threaded sleeve 11 is achieved by arranging the limiting rod 24, the threaded sleeve 11 is prevented from being driven to rotate together when the threaded rod 10 rotates, the pulley 12 matched with the triangular block 6 for use is fixedly connected to the right side of the threaded sleeve 11, the positive and negative motor 13 is fixedly connected to the top of the inner wall of the casing 1 and corresponds to the position of the pulley 12, the positive and negative rotating shaft 14 is fixedly connected to an output shaft of the positive and negative motor 13, the first bevel gear 15 is fixedly connected to the left end of the positive and negative rotating shaft 14, the second bevel gear 16 meshed with the first bevel gear 15 is fixedly connected to the surface of the threaded rod 10 and corresponds to the position of the first bevel gear 15, four fixing plates 17 which are uniformly distributed are fixedly connected to the right side of the wind wheel disc 4, two bearing seats, one end of the blade shaft 19, which is far away from the push rod 5, penetrates through the bearing seats 18 and extends to the outside of the bearing seats and is fixedly connected with the blades 20, the surface of the blade shaft 19 is fixedly connected with the rotating block 21, which is positioned between the two bearing seats 18, the surface of the push rod 5 is fixedly connected with the inserting rod 22, which corresponds to the rotating block 21, one end of the inserting rod 22, which is far away from the push rod 5, penetrates through the rotating block 21 and extends to the outside of the rotating block, the top of the rotating block 21 is provided with a movable hole 25, one end of the inserting rod 22, which is close to the movable hole 25, penetrates through the movable hole 25 and extends to the outside of the rotating block, the limiting effect on the inserting rod 22 is achieved by arranging the movable hole 25, the movement range of the inserting rod 22 is limited, and the blade shaft can move through the first rolling bearing 2, the hollow main shaft 3, the wind wheel disc 4, the push rod 5, the, The first bevel gear 15, the second bevel gear 16, the fixing plate 17, the bearing seat 18, the rotating block 21 and the inserting rod 22 are matched with each other, so that a good pitch changing effect is achieved, blades 20 can be synchronously changed in pitch, the stability and the power generation efficiency of the wind driven generator are improved, and the service life of the wind driven generator is prolonged.
When the wind power is too small, the forward and reverse motor 13 is started in a forward direction, the forward and reverse shaft 14 is driven to rotate by the forward and reverse motor 13, the first bevel gear 15 is driven to rotate by the forward and reverse shaft 14, the first bevel gear 15 drives the second bevel gear 16 to rotate, so that the threaded rod 10 is driven to rotate, the pulley 12 is driven to move downwards by the threaded sleeve 11, the triangular block 6, the push rod 5 and the inserted rod 22 are sequentially pushed to move rightwards by the pulley 12 while the reset spring 8 is compressed, the four rotating blocks 21 and the four blade shafts 19 are simultaneously and sequentially driven to deflect by the inserted rod 22, so that the included angle between the windward surface of the blade 20 and the wind direction is reduced, namely the force applied to the windward surface of the blade 20 is reduced, so that the rotating speed of the blade 20 is reduced, when the rotating speed of the hollow spindle 3 is reduced to a proper speed, the forward and reverse motor 13 is closed, and similarly, then, the reset spring 8 sequentially drives the push rod 5, the triangular block 6 and the inserted rod 22 to move leftwards to reset, so that the included angle between the windward side of each blade 20 and the wind direction is increased, the rotating speed of each blade 20 is improved, the effect of good pitch changing effect is achieved through the steps, each blade 20 can synchronously change the pitch, the stability and the power generation efficiency of the wind driven generator are improved, and the service life of the wind driven generator is also prolonged.
In summary, the following steps: the variable pitch device of the wind driven generator solves the problem that the variable pitch effect of the common variable pitch device of the wind driven generator is not ideal through the mutual matching of the first rolling bearing 2, the hollow main shaft 3, the wind wheel disc 4, the push rod 5, the triangular block 6, the baffle 7, the reset spring 8, the second rolling bearing 9, the threaded rod 10, the threaded sleeve 11, the pulley 12, the positive and negative motor 13, the positive and negative rotating shaft 14, the first bevel gear 15, the second bevel gear 16, the fixed plate 17, the bearing seat 18, the rotating block 21 and the inserted rod 22.
Second embodiment: a variable pitch device of a wind driven generator comprises a casing 1, a first rolling bearing 2 is fixedly connected to the middle point on the right side of the inner wall of the casing 1, a hollow main shaft 3 is movably connected inside the first rolling bearing 2, the right end of the hollow main shaft 3 sequentially penetrates through the first rolling bearing 2 and the casing 1 from left to right and extends to the outside of the casing 1 to be fixedly connected with a wind wheel disc 4, a push rod 5 is arranged on the right side of the wind wheel disc 4 and corresponds to the hollow main shaft 3, the left end of the push rod 5 sequentially penetrates through the wind wheel disc 4, the hollow main shaft 3 and the casing 1 from right to left and extends to the inside of the casing 1 to be fixedly connected with a triangular block 6, a baffle 7 is movably connected to the surface of the push rod 5 and is positioned between the triangular block 6 and the hollow main shaft 3, and the top and the bottom of the baffle 7 are fixedly, the surface of the push rod 5 is sleeved with a return spring 8 at a position between the baffle 7 and the triangular block 6, one end of the return spring 8 close to the baffle 7 is fixedly connected with the baffle 7, one end of the return spring 8 close to the triangular block 6 is fixedly connected with the triangular block 6, the top and the bottom of the inner wall of the casing 1 at the left side of the triangular block 6 are fixedly connected with second rolling bearings 9, the two second rolling bearings 9 are movably connected through a threaded rod 10, the surface of the threaded rod 10 at a position corresponding to the triangular block 6 is in threaded connection with a threaded sleeve 11, the right side of the threaded sleeve 11 is fixedly connected with a pulley 12 used in cooperation with the triangular block 6, the top of the inner wall of the casing 1 at a position corresponding to the pulley 12 is fixedly connected with a positive and negative motor 13, a positive and negative rotating shaft 14 is fixedly connected to an output shaft of the positive and negative rotating shaft 13, and, the position of the surface of the threaded rod 10 corresponding to the first bevel gear 15 is fixedly connected with a second bevel gear 16 which is meshed with the first bevel gear 15, the right side of the air wheel disc 4 is fixedly connected with four fixing plates 17 which are uniformly distributed, the surface of each fixing plate 17 is elastically and movably connected with two bearing seats 18, a movable hole 25 is formed in the top of the rotating block 21, one end, close to the movable hole 25, of the inserted link 22 penetrates through the movable hole 25 and extends to the outside of the inserted link, the bottoms of the two bearing seats 18 are respectively connected to one end of a spring which is vertically inserted into a concave hole in the fixing plate 17, a reinforcing shaft is arranged in the concave hole in the fixing plate 17, the spring is sleeved outside the reinforcing shaft, the other end of the spring is fixedly connected to the bottom of the concave hole, and the rotating block 21 is positioned on the side;
the surface of the triangular block 6 contacting with the pulley 12 is divided into two sections, the dividing point of the two sections is positioned at the top point close to the upper part of the triangular block, when the pulley 12 is positioned at the dividing point, one end of the rotating block 21 provided with the movable hole 25 rotates along with the movement of the push rod 5 until contacting with the outer edge of the wind wheel disc 4 and is blocked, when the pulley 12 is positioned below the dividing point, the spring in the concave hole in the fixed plate 17 is in a tensioning state, so that the fan blade can be firmly elastically tensioned on the fixed plate 17 by the spring and the reinforcing shaft therein without mutual dislocation in normal rotation.
In this embodiment, the two bearing blocks 18 are elastically movably connected to the surface of the fixing plate 17 instead of being fixedly mounted, and when the wind force is too large and cannot be balanced by the blade angle, the blades 20 are obliquely stored toward the casing 1 by the reinforcing shaft, and the operation is suspended, so that the self-protection of the system is achieved. The specific working process is as follows:
when the wind speed is in the normal working range, namely in the bearable range of the blade 20, according to the method in the first embodiment, the matching of the wind speed is realized by sliding the pulley 12 on the upper surface below the dividing point position on the triangular block 6, and in the process, the spring in the concave hole in the fixed plate 17 is in a tensioned state, so that the rotating blade 20 and the two bearing seats 18 at the lower part thereof can be firmly and elastically tensioned on the fixed plate 17 without mutual dislocation; when the wind speed is too high, namely the problem cannot be solved by adjusting the windward angle of the blade 20, the pulley 12 is slid upwards to the dividing point position on the triangular block 6, at this time, one end of the rotating block 21, which is provided with the movable hole 25, rotates along with the leftward movement of the push rod 5 to touch and abut against the groove on the outer edge of the wind wheel disc 4 without sliding accidentally, so that the rotating motion of the rotating block 21 is blocked stably, then the pulley 12 continues to slide upwards, at this time, as the rotating block 21 is blocked, the push rod 5 continues to move leftwards along with the rising of the pulley 12, the rotating block 21 forces the blade shaft 19 to pull out two bearings from the fixed plate 17, so as to move away from the fixed plate 17, because the rotating block 21 is located on the side of the blade 5 on the middle shaft 19 of the two bearing blocks 18, one of the two bearing blocks 18 close to the push rod 5 will be far away from the fixed plate 17 than the other bearing block, the two bearing blocks 18 and the vane shafts 19 therein are inclined toward the housing 1, and the vanes 20 are also inclined in the same direction, and when the pulley 12 moves upward to the vertex, the movement is stopped, and the vanes 20 reach the expected inclined receiving angle, which is related to the deformation amount required by the supporting strength of the spring in the fixing plate 17 and the length of the vertex from the critical point position on the triangle block.
In the process, the reinforcing shaft sleeved with the spring in the concave hole in the fixed plate 17 keeps the bearing seat 18 to be elastically pulled and tightly attached to the fixed plate 17 within a normal wind power range, so that the normal operation of each fan blade is ensured, and in the process of carrying out inclined storage by overlarge wind power, the spring in the concave hole in the fixed plate 17 can keep the two bearing seats to be pulled out and inclined without falling by matching with the reinforcing shaft in the concave hole. Therefore, the requirement for accommodating two actions of windward angle adaptation and inclination is met by utilizing the same fan blade adjusting structure in the embodiment, the size is large due to the fact that the adjusting structure and the accommodating structure are required to be arranged in the prior art, and meanwhile the safety and the operation convenience of the generator set are improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A variable pitch device of a wind driven generator comprises a machine shell (1), and is characterized in that: the middle point on the right side of the inner wall of the casing (1) is fixedly connected with a first rolling bearing (2), the inner part of the first rolling bearing (2) is movably connected with a hollow main shaft (3), the right end of the hollow main shaft (3) sequentially penetrates through the first rolling bearing (2) and the casing (1) from left to right and extends to the outer part of the casing (1) to be fixedly connected with a wind wheel disc (4), the right side of the wind wheel disc (4) is provided with a push rod (5) corresponding to the position of the hollow main shaft (3), the left end of the push rod (5) sequentially penetrates through the wind wheel disc (4), the hollow main shaft (3) and the casing (1) from right to left and extends to the inner part of the casing (1) to be fixedly connected with a triangular block (6), the position of the surface of the push rod (5) between the triangular block (6) and the hollow main shaft (3) is movably connected with a baffle plate (7), and the top and the bottom of the, the surface of the push rod (5) is positioned between the baffle (7) and the triangular block (6), the reset spring (8) is sleeved at the position between the baffle (7) and the triangular block (6), one end of the reset spring (8) close to the baffle (7) is fixedly connected with the baffle (7), one end of the reset spring (8) close to the triangular block (6) is fixedly connected with the triangular block (6), the top and the bottom of the inner wall of the casing (1) are positioned at the left side of the triangular block (6) and are fixedly connected with second rolling bearings (9), the two second rolling bearings (9) are movably connected through threaded rods (10), the surface of each threaded rod (10) is in threaded connection with a threaded sleeve (11) corresponding to the position of the triangular block (6), the right side of the threaded sleeve (11) is fixedly connected with a pulley (12) matched with the triangular block (6), the top of the inner wall of the casing (1) is fixedly connected with a positive and, a forward and reverse rotating shaft (14) is fixedly connected to an output shaft of the forward and reverse motor (13), a first bevel gear (15) is fixedly connected to the left end of the forward and reverse rotating shaft (14), a second bevel gear (16) which is meshed with the first bevel gear (15) is fixedly connected to the surface of the threaded rod (10) and corresponds to the position of the first bevel gear (15), four fixing plates (17) which are uniformly distributed are fixedly connected to the right side of the air wheel disc (4), two bearing seats (18) are fixedly connected to the surface of each fixing plate (17), the two bearing seats (18) are movably connected through a blade shaft (19), one end, away from the push rod (5), of the blade shaft (19) penetrates through the bearing seats (18) and extends to the outer part of the blade shaft (20), and a rotating block (21) is fixedly connected to the surface of the blade shaft (19) and is positioned between the, an inserting rod (22) is fixedly connected to the surface of the push rod (5) and corresponds to the position of the rotating block (21), one end, far away from the push rod (5), of the inserting rod (22) penetrates through the rotating block (21) and extends to the outside of the rotating block, a movable hole (25) is formed in the top of the rotating block (21), and one end, close to the movable hole (25), of the inserting rod (22) penetrates through the movable hole (25) and extends to the outside of the movable hole;
the surface of the fixed plate (17) is elastically and movably connected with two bearing seats (18), a movable hole (25) is formed in the top of the rotating block (21), one end, close to the movable hole (25), of the inserted rod (22) penetrates through the movable hole (25) and extends to the outside of the movable hole, the bottoms of the two bearing seats (18) are respectively connected to one end of a spring which is vertically inserted into a concave hole in the fixed plate (17), a reinforcing shaft is arranged in the concave hole in the fixed plate (17), the spring is sleeved outside the reinforcing shaft, the other end of the spring is fixedly connected to the bottom of the concave hole, and the rotating block (21) is located on the side, close to the push rod (5), of a middle blade shaft (19) of the two bearing seats (18);
the surface of the triangular block (16) which is in contact with the pulley (6) is divided into two sections, the dividing point of the two sections is positioned at the top point close to the upper part of the triangular block, and when the pulley (12) is positioned at the dividing point, one end of the rotating block (21) which is provided with the movable hole (25) rotates along with the movement of the push rod (5) to touch the outer edge of the wind wheel disc (4) and is abutted against the adaptive groove on the edge so as to be firmly blocked;
two limiting plates (23) are symmetrically arranged on the left side of the inner wall of the machine shell (1), and the top of the threaded sleeve (11) is in contact with the limiting plates (233); a limiting rod (24) is arranged at the top of the threaded sleeve (11) and in a position corresponding to the limiting plate (23), the bottom of the limiting rod (24) penetrates through the threaded sleeve (23) and extends to the outside of the threaded sleeve to be fixedly connected with the limiting plate (23), and the top of the limiting rod (24) is fixedly connected with the limiting plate (23);
when the wind speed is too high, the pulley (12) is upwards slid to the position of a dividing point on the triangular block (6), at the moment, one end of the rotating block (21) provided with the movable hole (25) rotates along with the leftward movement of the push rod (5) to touch and abut against the groove on the outer edge of the wind wheel disc (4) without accidentally sliding, so that the rotating motion of the rotating block (21) is stably blocked, then the pulley (12) continues to upwards slide, at the moment, because the rotating block (12) is blocked, the push rod (5) continues to leftwards move along with the rising of the pulley (12), the rotating block (21) forces the blade shaft (19) to pull out two bearings from the fixed plate (17) so as to move away from the fixed plate (17) in the direction, and because the rotating block (21) is positioned on the side, close to the push rod (5), of the blade shaft (19) between the two bearing blocks (18), one of the two bearing seats (18) close to the push rod (5) is far away from the inside of the fixed plate (17) to a greater extent than the other bearing seat, so that the two bearing seats (18) and the blade shaft (19) in the two bearing seats tilt towards the machine shell (1), the blades (20) also tilt in the same direction correspondingly, when the pulley (12) moves upwards to the vertex, the movement is stopped, and the blades (20) reach a desired inclined receiving angle which is related to the deformation amount required by the supporting strength of the spring in the fixed plate (17) and the length of the distance between the vertex and the critical point position on the triangular block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810956103.3A CN109026531B (en) | 2018-08-21 | 2018-08-21 | Variable pitch device of wind driven generator |
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| CN201810956103.3A CN109026531B (en) | 2018-08-21 | 2018-08-21 | Variable pitch device of wind driven generator |
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| CN109026531A CN109026531A (en) | 2018-12-18 |
| CN109026531B true CN109026531B (en) | 2020-05-15 |
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| CN109893378B (en) * | 2019-02-22 | 2021-02-26 | 莱芜职业技术学院 | Doctor-patient communication emergency nursing platform |
| CN109899243A (en) * | 2019-02-26 | 2019-06-18 | 泗阳高传电机制造有限公司 | Blade adjustment seat in a kind of paddle change system of wind turbines |
| CN112957638B (en) * | 2021-03-22 | 2023-02-21 | 江苏复森特种阀门有限公司 | Fire arrester with changeable structure |
| CN113155619B (en) * | 2021-04-30 | 2022-06-07 | 吉林大学 | Quasi-static in-situ biaxial stretching mechanical property testing device under scanning electron microscope |
| CN113323792B (en) * | 2021-06-01 | 2022-08-19 | 湖南潇湘船舶有限公司 | Airflow pushing type blade rotating power generation equipment for ship |
| CN113404629B (en) * | 2021-06-18 | 2022-05-27 | 绍兴亚冠机电科技有限公司 | Hybrid power traction type generator for power supply |
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| GB182740A (en) * | 1922-02-11 | 1922-07-13 | Henric Christian Vogt | Improvements in and relating to windmills |
| JPS59134385A (en) * | 1983-01-24 | 1984-08-02 | Matsushita Seiko Co Ltd | Safety device for wind force prime mover |
| KR100737407B1 (en) * | 2005-11-23 | 2007-07-12 | (주) 썬에어로시스 | The Wind turbine blade pitch control device |
| CN100532832C (en) * | 2007-09-29 | 2009-08-26 | 陈亦栋 | Oar-changing speed-regulating device for wind-driven generator |
| GB2475217B (en) * | 2008-08-22 | 2013-03-20 | Natural Power Concepts Inc | Folding blade turbine |
| CN201339544Y (en) * | 2008-12-25 | 2009-11-04 | 浙江华鹰风电设备有限公司 | Passive pitch-controlled wind-powered generator with shifting device |
| CN101852184A (en) * | 2010-06-04 | 2010-10-06 | 浙江华鹰风电设备有限公司 | Medium and small sized variable propeller pitch wind-driven generator |
| CN104675622A (en) * | 2014-12-02 | 2015-06-03 | 青岛金博士自动化技术有限公司 | Wind driven generator with variable-pitch device and control method of wind driven generator |
| CN105508138B (en) * | 2015-12-10 | 2018-05-25 | 清华大学 | A kind of adjustable vane change device of front support based on inclination hinged blades |
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Effective date of registration: 20200423 Address after: 541300 industrial concentration zone, Xing'an Town, Xing'an County, Guilin City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Xing'an Wind Power Co., Ltd. of State Power Investment Group Address before: 450000 No. 100 Lianhua Street, Zhengzhou City, Henan Province Applicant before: Shi Shanxia |
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