CN220955907U - Variable-pitch wind driven generator - Google Patents

Abstract

The utility model provides a variable pitch wind driven generator which comprises a motor mounting seat and blades, wherein an opening is formed in the motor mounting seat, and the blades are rotationally connected to the opening through a variable pitch bearing; the variable pitch bearing is internally provided with a planetary roller screw pair mechanism, and the output end of the planetary roller screw pair mechanism is in transmission connection with the blade and is used for driving the blade to rotate. The planetary roller screw pair mechanism is used as a power driving system for driving the blades to rotate, the blades with larger weight can be borne, and the planetary roller screw pair mechanism is arranged in the variable pitch bearing, so that the whole structure of the motor mounting seat is more compact, and the whole size is miniaturized.

Description

Variable-pitch wind driven generator

Technical Field

The utility model belongs to the technical field of wind motor equipment, and particularly relates to a variable pitch wind driven generator.

Background

Wind power generation is a device for converting wind energy into electric energy, and mainly utilizes wind power to drive blades on a wind wheel to rotate, and then the rotating speed is increased through a speed increaser so as to promote a generator to generate electricity. The existing wind driven generator is provided with a fixed pitch and a variable pitch, and the variable pitch is a variable pitch system with a variable blade angle, which is used for adjusting the attack angle of the blade under the condition of different wind power, so that the wind driven generator can ensure that the maximum energy (corresponding to rated power) is acquired and simultaneously reduce the impact of wind power on the wind driven generator, thereby becoming the development trend of the large-scale wind driven generator set nowadays. In the Chinese patent with the bulletin number of CN112431717A in the prior art, a unified pitch system and a pitch method of a small-sized wind turbine blade are disclosed, the pitch of the fan blade is controlled by utilizing a ball screw transmission system, and the system specifically comprises a screw, a translation block and a connecting rod mechanism, wherein the translation block is connected with the screw through a ball, so that a ball screw transmission system is formed, and the linear movement combined connecting rod mechanism of the translation block is used for controlling the pitch of the fan blade, however, the bearing capacity of the ball screw transmission system is poor, and the service life of the ball screw transmission system is lower when the ball screw transmission system faces larger fan blades.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a pitch wind turbine generator, which is used for solving the technical problems of poor bearing capacity of a ball screw transmission system and lower service life when facing larger fan blades in the prior art.

In order to achieve the above and other related objects, the present utility model provides a pitch wind power generator, comprising a motor mounting seat and a blade, wherein an opening is formed on the motor mounting seat, and the blade is rotatably connected to the opening through a pitch bearing; the planetary roller screw pair mechanism is arranged in the variable pitch bearing, the planetary roller screw pair mechanism is positioned in the variable pitch bearing, and the output end of the planetary roller screw pair mechanism is in transmission connection with the blade and is used for driving the blade to rotate.

Optionally, the pitch bearing comprises an outer ring and a connecting disc, the outer ring is fixed at the opening, the connecting disc is rotationally connected in the outer ring, the blade is fixedly connected on the connecting disc, a through hole is coaxially arranged at the center of the connecting disc, a circle of connecting teeth is arranged on the side wall of the through hole, a gear is rotationally connected with the through hole, the axis of the gear and the length direction of the connecting teeth are parallel to the axis of the through hole, and the gear is meshed and connected with the connecting teeth; the planetary roller screw pair mechanism is positioned in the through hole, and the output end of the planetary roller screw pair mechanism is connected with the gear in a transmission manner and used for driving the gear to rotate.

Optionally, a relief hole is coaxially formed in the connecting disc, the radial dimension of the relief hole is larger than that of the through hole, two ends of the relief hole are communicated with the through hole, and the gear is in meshed connection with connecting teeth on the side walls of the through holes at two ends of the relief hole; the output end of the planetary roller screw pair mechanism points to the yielding hole, and the output end of the planetary roller screw pair mechanism is in meshed connection with the part of the gear facing the yielding hole.

Optionally, the planetary roller screw pair mechanism includes motor portion, lead screw and rack, the one end of rack with face the partial meshing of gear of hole of stepping down is connected, the other end of rack with lead screw one end rigid coupling, the lead screw is located in the motor portion and through motor portion drive axial displacement.

Optionally, the motor part comprises a stator, a rotor and a shell, and the planetary roller screw pair mechanism further comprises a roller and a nut; the shell is fixed in the motor mounting seat, the nut is rotationally connected in the shell, the rotor is fixed on the outer surface of the nut, and the stator is fixed in the shell and surrounds the rotor and the nut; the screw rod is coaxial with the nut, and one end of the rack, which is far away from the gear, penetrates into the shell and is fixedly connected with the screw rod positioned in the nut; the screw is characterized in that two parallel roller retainers are coaxially arranged on the screw, the rollers are a plurality of and encircle the outer surface of the screw, the axes of the rollers are parallel to the axes of the screw, two ends of each roller are respectively connected with the two roller retainers in a rotating mode, external threads are arranged on the surfaces of the rollers, internal threads are arranged on the inner wall surfaces of the nuts, and the rollers are respectively meshed and connected with the screw and the internal threads on the inner wall surfaces of the nuts.

Optionally, the motor part is fixed in the center of the hole of stepping down, and the direction of movement of the rack is along the radial direction of the hole of stepping down.

Optionally, a fixing hole is formed in the center of the screw rod, and one end of the rack is fixedly installed in the fixing hole.

Optionally, a plurality of mounting holes which are distributed annularly around the through holes are formed in the connecting disc, a screw is connected in the mounting holes in a threaded mode, screw holes are formed in the end portions of the blades, and one end of the screw, penetrating out of the mounting holes, is connected in the screw holes in a threaded mode.

Optionally, the opening is a plurality of and is located on the same radial plane of motor mount pad, and every opening part all is connected with one the blade, the rigid coupling has the output shaft in the motor mount pad, the axis of output shaft is perpendicular to the radial plane that each opening is located, set firmly the support frame that corresponds with each opening on the output shaft, each motor portion respectively with each support frame rigid coupling.

Optionally, the support frame is towards the one end of motor portion is equipped with the mounting groove, the open top of mounting groove is opened and can be dismantled and be connected with and be used for its confined top cap, motor portion installs the top cap with in the space that the mounting groove formed, the side of mounting groove is equipped with the confession the uncovered that the rack passed.

As described above, the variable pitch wind driven generator has at least the following beneficial effects:

1. The variable pitch bearing is arranged on the motor mounting seat, so that the blades can rotate by an angle relative to the motor mounting seat, and the purpose of variable pitch of the fan is realized; the planetary roller screw pair mechanism drives the blades to rotate, so that the load capacity of the whole fan is greatly improved; the design that the planetary roller screw rod pair mechanism is arranged in the pitch bearing enables the whole structure of the pitch wind driven generator to be more compact, and the whole volume is miniaturized;

2. The design of arranging the abdication hole in the connecting disc of the pitch bearing ensures that the output end of the planetary roller screw pair mechanism can enter and exit in the abdication hole when the driving gear rotates, so that the structure is more compact when the planetary roller screw pair mechanism is arranged in the pitch bearing;

3. Through the rigid coupling support frame on the output shaft in the motor mount pad for planetary roller screw pair mechanism can be supported by the support frame in the pitch bearing, when blade and opening have a plurality of, the stability of planetary roller screw pair mechanism operation is better, and the drive is more steady.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a variable pitch wind turbine according to the present utility model.

Fig. 2 is a schematic view of a motor mount according to the present utility model with a blade removed.

Fig. 3 shows a cross-sectional view of the motor mount of the present utility model (with the support frame and rack omitted).

Fig. 4 shows a cross-sectional view of a pitch bearing according to the utility model.

Fig. 5 is a schematic view showing the structure of the planetary roller screw pair mechanism in the present utility model.

Fig. 6 is a cross-sectional view of a motor part in the present utility model.

Fig. 7 is a schematic structural diagram of a supporting frame and a motor part on an output shaft in the present utility model.

Fig. 8 is a schematic view showing the structure of the mounting groove and the top cover in the present utility model.

Description of element reference numerals

The rotor comprises a motor mounting seat 1, a blade 2, a pitch bearing 3, an opening 4, a planetary roller screw pair mechanism 5, an outer ring 6, a connecting disc 7, a fixed convex ring 8, a through hole 9, a yielding hole 10, a gear 11, a connecting tooth 12, a motor part 13, a rack 14, a screw 15, a stator 16, a rotor 17, a shell 18, a nut 19, a roller 20, a roller retainer 21, a mounting hole 22, an output shaft 23, a support frame 24, a mounting groove 25, a chute 26, a top cover 27 and a bar-shaped sliding block 28.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.

Referring to fig. 1-3, the utility model provides a variable pitch wind driven generator, which comprises a motor mounting seat 1 and a blade 2, wherein an opening 4 is formed in the motor mounting seat 1, and the blade 2 is rotationally connected to the opening 4 through a variable pitch bearing 3; the variable-pitch bearing 3 is internally provided with a planetary roller screw pair mechanism 5, the planetary roller screw pair mechanism 5 is positioned in the variable-pitch bearing 3, and the output end of the planetary roller screw pair mechanism 5 is in transmission connection with the blade 2 and is used for driving the blade 2 to rotate. When the motor mounting seat 1 is particularly used, the motor mounting seat 1 is rotatably mounted on a vertical supporting rod, and the motor mounting seat 1 and the supporting rod are not improved, so that the motor mounting seat is not repeated here. The motor mount 1 is a mounting base of the blades 2, the motor mount 1 is a shell structure, the appearance of the motor mount 1 can be designed according to the number of the blades 2, for example, in this embodiment, 3 blades 2 are provided as examples, the motor mount 1 is designed into a triangular prism shape according to the design, and the edge is in arc transition, and because the planetary roller screw pair mechanism 5 is used for rotationally driving the blades 2 in the utility model, the blades 2 can adopt the blades 2 with larger length. When the blades 2 are installed, the variable-pitch bearing 3 is installed at the opening 4 of the motor installation seat 1, so that the blades 2 can rotate relative to the motor installation seat 1, and in order to enable the structure of the planetary roller screw pair mechanism 5 for driving the rotation of the blades 2 in the motor installation seat 1 to be more compact, the variable-pitch bearing 3 is improved, so that the planetary roller screw pair mechanism 5 is installed in the variable-pitch bearing 3, the space in the motor installation seat 1 can be effectively utilized, and one planetary roller screw pair mechanism 5 is arranged in the variable-pitch bearing 3 connected with each blade 2, so that when the blades 2 integrally rotate, the variable-pitch angle force of the driving blades 2 is more uniform, and the operation is more stable.

Referring to fig. 2 to 4, alternatively, the pitch bearing 3 includes an outer ring 6 and a connecting disc 7, the outer ring 6 is fixed at the opening 4, the connecting disc 7 is rotatably connected in the outer ring 6, the blade 2 is fixedly connected to the connecting disc 7, a through hole 9 is coaxially provided at the center of the connecting disc 7, a circle of connecting teeth 12 is provided on a side wall of the through hole 9, a gear 11 is rotationally connected to the through hole 9, an axis of the gear 11 and a length direction of the connecting teeth 12 are parallel to an axis of the through hole 9, and the gear 11 is engaged with the connecting teeth 12; the planetary roller screw pair mechanism 5 is located in the through hole 9, and the output end of the planetary roller screw pair mechanism 5 is in transmission connection with the gear 11 and is used for driving the gear 11 to rotate. In this embodiment, the outer ring 6 and the connecting disc 7 form the variable pitch bearing 3, the connecting disc 7 is coaxially connected in the outer ring 6, a fixed convex ring 8 is fixedly arranged on one side of the opening 4 facing the outside of the motor mounting seat 1, a flange protruding radially along the outer ring 6 is integrally arranged in the middle of the outer side surface of the outer ring 6, the flange and the end surface of the fixed convex ring 8 facing the outside of the motor mounting seat 1 are detachably and fixedly connected through a circle of bolts, and the outer side surface of the outer ring 6 stretches into the inside of the fixed convex ring 8 and is attached to the inner wall of the fixed convex ring 8; grooves are respectively formed in the opposite side walls of the connecting disc 7 and the outer ring 6, sliding columns are arranged in the grooves in a rolling mode, the rotation of the connecting disc 7 relative to the outer ring 6 is achieved through the sliding columns and the grooves, and the principle is that the connection relation between the inner ring and the outer ring 6 of the existing bearing is not repeated here. The utility model improves the pitch bearing 3 in that on the connecting disc 7, for the inner ring of the existing bearing, the center of the connecting disc 7 is provided with a through hole 9, the side wall of the through hole 9 is provided with a circle of connecting teeth 12 parallel to the axial direction of the through hole 9, the gear 11 is meshed with the connecting teeth 12 to realize the integral rotation of the connecting teeth 12 and the connecting disc 7, the space for installing the planetary roller screw pair mechanism 5 is provided for the through hole 9, the part between the through hole 9 of the connecting disc 7 and the edge of the connecting disc 7 provides the basis for installing the blade 2, so that the fixedly connected blade 2 and the connecting disc 7 is realized, therefore, the connecting disc 7 can rotate the blade 2 and the connecting disc 7 together after being driven by the gear 11 to rotate, and the gear 11 is driven by the planetary roller screw pair mechanism 5 positioned in the through hole 9, so that the blade 2 is driven to rotate by the planetary roller screw pair mechanism 5 to realize the function of angle modulation. The specific installation relation of the gear 11 can be various, for example, two ends of the gear 11 are polished rods and extend out of two ends of the through hole 9, two connecting rods are fixedly arranged at two ends of the outer ring 6 along the radial direction of the outer ring towards the center direction of the connecting disc 7, and two ends of the gear 11 are respectively connected with the free ends of the two connecting rods through the existing bearings in a rotating way, so that the gear 11 is installed in the through hole 9; or a bracket extending into the through hole 9 is fixedly arranged in the motor mounting seat 1, so that two ends of the gear 11 are rotatably arranged on the bracket through bearings. The output end of the planetary roller screw assembly mechanism 5 may drive a portion of the gear 11 that is not engaged with the connecting teeth 12, for example, a portion of the gear 11 near both end portions, and at this time, the linear movement direction of the output end is the upper or lower direction of the through hole 9.

Referring to fig. 3 to 4, preferably, a relief hole 10 is coaxially formed in the connecting disc 7, the radial dimension of the relief hole 10 is larger than that of the through hole 9, two ends of the relief hole 10 are communicated with the through hole 9, and the gear 11 is meshed with and connected with the connecting teeth 12 on the side walls of the through holes 9 at two ends of the relief hole 10; the output end of the planetary roller screw pair mechanism 5 points to the inside of the yielding hole 10, and the output end of the planetary roller screw pair mechanism 5 is in meshed connection with a part of the gear 11 facing the yielding hole 10. In this embodiment, since the planetary roller screw pair mechanism 5 outputs rotation as linear motion, and therefore, the output end has the characteristic of linear motion, after the yielding hole 10 is formed in the connecting disc 7, the output end of the planetary roller screw pair mechanism 5 has a moving space in the middle of the connecting disc 7, so that the layout of the structure is more reasonable, and meanwhile, the movement of the output end is protected, the problem that when the planetary roller screw pair mechanism is located above or below the through hole 9, interference with other mechanisms or exposure to the outside of the through hole 9 is possibly caused is avoided, the weight of the connecting disc 7 is reduced while the structure is better laid out, the overall weight of the pitch wind driven generator is reduced, and the lightweight design is realized.

Referring to fig. 5 to 6, alternatively, the planetary roller screw pair mechanism 5 includes a motor portion 13, a screw 15, and a rack 14, one end of the rack 14 is engaged with a portion of the gear 11 facing the yielding hole 10, the other end of the rack 14 is fixedly connected to one end of the screw 15, and the screw 15 is located in the motor portion 13 and is driven to move axially by the motor portion 13. In this embodiment, the motor portion 13 is located in the through hole 9, and the motor portion 13 is mainly configured to drive the rack 14 to move along a length direction thereof, so as to drive the gear 11 engaged with the rack to rotate, and further drive the connection disc 7 to rotate through the gear 11; the rack 14 and the screw 15 may be integrally formed. In order to maximally utilize the space, the moving direction of the rack 14 points to the relief hole 10, the motor portion 13 is located at the center of the relief hole 10, the rack 14 can move from the center of the relief hole 10 to the inner edge of the relief hole 10 or move in the opposite direction under the driving of the motor portion 13, and the driving gear 11 rotates in the forward or reverse direction.

Referring to fig. 5 to 6, the motor part 13 includes a stator 16, a rotor 17, and a housing 18, and the planetary roller screw pair mechanism 5 further includes a roller 20 and a nut 19; the shell 18 is fixed in the motor mounting seat 1, the nut 19 is rotatably connected in the shell 18, the rotor 17 is fixed on the outer surface of the nut 19, and the stator 16 is fixed in the shell 18 and surrounds the rotor 17 and the nut 19; the screw rod 15 and the nut 19 are coaxial, and one end of the rack 14, which is far away from the gear 11, penetrates into the shell 18 and is fixedly connected with the screw rod 15 positioned in the nut 19; the screw rod 15 is coaxially provided with two parallel roller retainers 21 in a rotating manner, the rollers 20 are a plurality of and encircle the outer surface of the screw rod 15, the axes of the rollers 20 are parallel to the axes of the screw rod 15, two ends of each roller 20 are respectively connected with the two roller retainers 21 in a rotating manner, the surfaces of the rollers 20 are provided with external threads, the inner wall surface of the nut 19 is provided with internal threads, and the rollers 20 are respectively connected with the screw rod 15 and the internal threads in the nut 19 in a meshed manner. In this embodiment, the nut 19 rotates to drive the roller 20 to rotate, and the roller 20 revolves around the axis of the nut 19 while rotating, and because the roller 20 is meshed with the screw 15, the roller 20 and the screw 15 translate along the axis direction of the screw 15, and the translation of the screw 15 drives the translation of the rack 14, so that the gear 11 is driven to rotate to drive the connecting disc 7 to rotate, compared with the common screw pair structure, the planetary screw pair mechanism 5 in this embodiment is reverse, that is, the rotation of the nut 19 is converted into the translation of the screw 15, so that the planetary screw pair mechanism 5 is a reverse planetary screw pair.

Referring to fig. 6, the two ends of the roller 20 are provided with a first outer gear ring, the first outer gear ring and the roller 20 are coaxial, the two ends of the screw 15 are coaxially provided with a second outer gear ring, and the first outer gear ring and the second outer gear ring on the same side are in rolling engagement connection, so as to play a role in transferring the reducing force, which is the prior art and will not be repeated here.

In this embodiment, by fixedly mounting the rotor 17 on the outer surface of the nut 19, the rotor 17 and the nut 19 are formed into an integral structure, the nut 19 and the rotor 17 together form a motor rotor, a winding (not shown in the figure) is wound on the rotor 17, and when the winding is energized, the stator 16 is cut to generate an induced electromotive force and an electric current by a rotating magnetic field, and an electromagnetic torque is formed to rotate the nut 19, so that the power for driving the screw rod 15 to translate is provided in this way, and the structure of the device is more compact.

Referring to fig. 1 to 3, preferably, in order to ensure the stability of the movement of the motor portion driving screw 15 and the rack gear 14, the motor portion 13 is fixed at the center of the relief hole 10, and the movement direction of the rack gear 14 is along the radial direction of the relief hole 10. In this embodiment, the motor portion 13 may be fixed at the center of the relief hole 10 by some fixing components installed in the motor mounting seat 1, and because the gear 11 is eccentrically installed in the relief hole 10 and the through hole 9 for meshing with the connecting tooth 12, the weight difference of the gear 11 and the motor portion 13 is large, so that the motor portion 13 is installed at the center of the relief hole 10, so that the rack 14 extending out of the motor portion 13 meshes with the eccentric gear 11, and at this time, force balance can be achieved, so that the problem of unbalanced weight possibly caused by installing the planetary roller screw pair mechanism 5 at the relief hole 10 is effectively avoided, and the output of the planetary roller screw pair mechanism 5 is more stable when the angle of the blade 2 is adjusted; meanwhile, the radius size of the yielding hole 10 is larger than the size from the center of the yielding hole 10 to the free end of the rack 14 when the rack 14 extends to the maximum limit length, so that translation of the rack 14 is ensured to be limited in the yielding hole 10, but the edge of the yielding hole 10 cannot interfere with the same.

Referring to fig. 1 to 3, preferably, a fixing hole (not shown) is formed in the center of the screw rod 15, and one end of the rack 14 is fixedly installed in the fixing hole. In the routine maintenance, if the rack 14 is damaged, the rack 14 may be removed from the fixing hole and replaced.

Referring to fig. 1 to 3, the connecting disc 7 is provided with a plurality of mounting holes 22 distributed annularly around the through hole 9, the mounting holes 22 are internally connected with screws in a threaded manner, the ends of the blades are provided with screw holes, and one ends of the screws penetrating out of the mounting holes 22 are in threaded connection with the screw holes. Through the cooperation of screw rod and screw for blade and connection pad are convenient to detach and be connected, are convenient for maintain and change.

Referring to fig. 1 to 3 and 7, preferably, the number of openings 4 is several and are located on the same radial plane of the motor mount 1, each opening 4 is connected with one blade 2, an output shaft 23 is fixedly connected in the motor mount 1, the axis of the output shaft 23 is perpendicular to the radial plane where each opening is located, a supporting frame 24 corresponding to each opening is fixedly arranged on the output shaft 23, and each motor portion 13 is fixedly connected with each supporting frame 24. In this embodiment, the supporting frames 24 are uniformly distributed on the circumferential surface of the fixing ring, the fixing ring is fixedly sleeved in the middle of the output shaft 23, the supporting frames 24 are used for fixing the motor part 13 in the center of each yielding hole 10, and each supporting frame 24 corresponds to each opening 4, so that the supporting frames are uniformly distributed in the motor mounting seat 1, and the pitch wind power generator can stably run.

Referring to fig. 7 to 8, preferably, an end of the supporting frame 24 facing the motor portion 13 is provided with a mounting groove 25, a top of the mounting groove 25 is opened, a side surface of the mounting groove 25 is provided with an opening, and the rack 14 passes through the opening, so that the motor portion 13 is prevented from being separated from the side surface of the mounting groove 25 in use. Two sliding grooves 26 extending to the opposite ends of the installation groove 25 are respectively formed in the outer walls of the two ends of the open side face of the installation groove 25, one end of the side face of the two sliding grooves 26, which is open to the installation groove 25, is a through end, the other end of the side face is a closed end, namely, the other end of the side face does not extend to the edge of the installation groove 25, namely, is cut off, two strip-shaped sliding blocks 28 which are clamped with the two sliding grooves are respectively arranged in the two sliding grooves 26, the two strip-shaped sliding blocks 28 are fixedly connected to the opposite inner side faces of the top cover 27, the top cover 27 is clamped into the two sliding grooves 26 through the strip-shaped sliding blocks 28 so as to be fixed to the top of the installation groove 25, the top cover 27 slides out of the sliding grooves 26 through the strip-shaped sliding blocks 28, the top cover 27 is arched, and the inside of the top cover 27 jointly forms a space for installing the motor part 13 when being installed at the top of the installation groove 25. In this embodiment, the rack 14 in the motor part 13 is extended from the open side of the installation groove 25 and is engaged with the gear 11, and the bar-shaped sliding block 28 and the sliding groove 26 are in friction connection, so that they are not easy to be disengaged. The top cover 27 and the mounting groove 25 are used for realizing maintenance and replacement of the motor part 13, so that the motor part 13 can be detached only by taking the top cover 27 off the mounting groove 25 without an integral disassembly machine during operation, and the operation is more convenient.

In summary, according to the pitch-variable wind driven generator disclosed by the utility model, the planetary roller screw pair mechanism 5 is used as the driving mechanism for driving the blades 2 to change the pitch, so that the load capacity and the service life can be effectively improved, and the design that the planetary roller screw pair mechanism 5 is arranged at the center of the yielding hole 10 enables the output end of the planetary roller screw pair mechanism 5 to translate in the yielding hole 10 of the connecting disc 7, so that the internal structural layout of the motor mounting seat 1 is more compact, the space utilization efficiency is optimized, and various defects in the prior art are effectively overcome, so that the pitch-variable wind driven generator has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The utility model provides a become oar aerogenerator, includes motor mount pad and blade, its characterized in that: an opening is formed in the motor mounting seat, and the blade is rotationally connected to the opening through a variable-pitch bearing; the planetary roller screw pair mechanism is arranged in the variable pitch bearing, the planetary roller screw pair mechanism is positioned in the variable pitch bearing, and the output end of the planetary roller screw pair mechanism is in transmission connection with the blade and is used for driving the blade to rotate.

2. A variable pitch wind generator according to claim 1, wherein: the pitch bearing comprises an outer ring and a connecting disc, wherein the outer ring is fixed at the opening, the connecting disc is rotationally connected in the outer ring, the blades are fixedly connected on the connecting disc, a through hole is coaxially arranged in the center of the connecting disc, a circle of connecting teeth are arranged on the side wall of the through hole, a gear is rotationally connected in the through hole, the axis of the gear and the length direction of the connecting teeth are parallel to the axis of the through hole, and the gear is meshed and connected with the connecting teeth; the planetary roller screw pair mechanism is positioned in the through hole, and the output end of the planetary roller screw pair mechanism is connected with the gear in a transmission manner and used for driving the gear to rotate.

3. A variable pitch wind generator according to claim 2, wherein: a relief hole is coaxially formed in the connecting disc, the radial size of the relief hole is larger than that of the through hole, two ends of the relief hole are communicated with the through hole, and the gear is in meshed connection with connecting teeth on the side walls of the through holes at two ends of the relief hole; the output end of the planetary roller screw pair mechanism points to the yielding hole, and the output end of the planetary roller screw pair mechanism is in meshed connection with the part of the gear facing the yielding hole.

4. A variable pitch wind generator according to claim 3, wherein: the planetary roller screw pair mechanism comprises a motor part, a screw and a rack, one end of the rack is meshed with a part of the gear facing the abdication hole, the other end of the rack is fixedly connected with one end of the screw, and the screw is positioned in the motor part and is driven to axially move by the motor part.

5. A variable pitch wind generator according to claim 4, wherein: the motor part comprises a stator, a rotor and a shell, and the planetary roller screw pair mechanism further comprises a roller and a nut; the shell is fixed in the motor mounting seat, the nut is rotationally connected in the shell, the rotor is fixed on the outer surface of the nut, and the stator is fixed in the shell and surrounds the rotor and the nut; the screw rod is coaxial with the nut, and one end of the rack, which is far away from the gear, penetrates into the shell and is fixedly connected with the screw rod positioned in the nut; the screw is characterized in that two parallel roller retainers are coaxially arranged on the screw, the rollers are a plurality of and encircle the outer surface of the screw, the axes of the rollers are parallel to the axes of the screw, two ends of each roller are respectively connected with the two roller retainers in a rotating mode, external threads are arranged on the surfaces of the rollers, internal threads are arranged on the inner wall surfaces of the nuts, and the rollers are respectively meshed and connected with the screw and the internal threads on the inner wall surfaces of the nuts.

6. A variable pitch wind generator according to claim 4, wherein: the motor part is fixed at the center of the abdication hole, and the moving direction of the rack is along the radial direction of the abdication hole.

7. A variable pitch wind generator according to any of claims 4-6, wherein: the screw rod center is provided with a fixing hole, and one end of the rack is fixedly arranged in the fixing hole.

8. A variable pitch wind generator according to any of claims 2-6, wherein: the connecting disc is provided with a plurality of mounting holes which are distributed annularly around the through holes, the mounting holes are internally connected with screw rods in a threaded mode, the end portions of the blades are provided with screw holes, and one ends of the screw rods penetrating out of the mounting holes are connected in the screw holes in a threaded mode.

9. A variable pitch wind generator according to any of claims 4-6, wherein: the motor mounting seat is characterized in that the number of the openings is several, the openings are positioned on the same radial plane of the motor mounting seat, each opening is connected with one blade, an output shaft is fixedly connected in the motor mounting seat, the axis of the output shaft is perpendicular to the radial plane where each opening is positioned, a supporting frame corresponding to each opening is fixedly arranged on the output shaft, and each motor part is fixedly connected with each supporting frame.

10. A variable pitch wind generator according to claim 9, wherein: the support frame towards the one end of motor portion is equipped with the mounting groove, the top of mounting groove is opened and can dismantle and be connected with and be used for its confined top cap, motor portion installs the top cap with in the space that the mounting groove formed, the side of mounting groove is equipped with the confession the uncovered that the rack passed.