CN111472933B - Small wind driven generator - Google Patents

Abstract

The invention discloses a small-sized wind driven generator, comprising: the bearing foundation is arranged at the bottom of the small wind driven generator; the supporting column is vertically fixed on the upper part of the bearing foundation; the power generation assembly comprises a cabin which is fixed at the top of the support column and can horizontally rotate, a stator which is fixed on the inner side wall of the cabin along the circumferential direction, and a rotor which is rotationally arranged on the inner ring of the stator along the axial direction; the outer part of the machine head is fixedly provided with a rotating shaft which extends outwards along the axial direction of the machine head, and the rotating shaft penetrates into the engine room and is fixedly connected with the rotor; the aircraft nose includes the casing, along the circumference equipartition in a plurality of blades of casing outlying, with each blade transmission be connected and can unify the transmission assembly who adjusts each blade inclination to and can drive transmission assembly and carry out rotatory drive assembly. The small wind driven generator is convenient to install, does not have strict site selection requirements on installation sites, and can be directly used in daily life and popularized comprehensively.

Description

Small wind driven generator

Technical Field

The invention relates to the technical field of new energy, in particular to a small wind driven generator.

Background

The traditional centralized power generation and supply mode has many problems (such as environmental pollution, small non-renewable resource reserves, low safety risk, low power supply reliability and the like), and the new energy power generation is gradually a research hotspot nowadays when the social consensus is formed by pursuing low energy consumption and high-efficiency environmental protection. The new energy mainly comprises solar energy, biomass energy, ocean energy and the like. This type of energy is the primary energy currently having the most value for large-scale commercial development and is abundant worldwide. Compared with traditional energy sources such as coal, petroleum, natural gas and the like, the new energy source has the greatest advantage of being renewable energy. Due to the excessive development of conventional energy, environmental protection and energy conservation issues in all countries around the world begin to pay more attention, and in recent years, the power industry is continuously developing and innovated towards higher levels from the research of scientific theory basis to the practice of engineering technology, and especially, the power Generation technology of clean and renewable new energy sources such as wind power Generation and photovoltaic power Generation is mature day by day, so that Distributed Generation (DG) is widely concerned.

With the current deep research on the access of the domestic distributed power supply to the power distribution network and the research on the power supply reliability of the power system, the concepts of distributed new energy and the operation in a local island are being popularized and applied comprehensively, and the research of the Anderson consulting company in the United states considers that: "the future far-end power transmission mode will be replaced by the local power supply mode of the load center, the load centers will reduce the demand for expensive long-distance transmission lines more and more", the DG will break the past one-way buying and selling pattern of the power industry, and the concepts of the buying and selling parties become fuzzy; meanwhile, local electricity taking becomes an important development trend in the future.

However, the existing large-scale wind power generator has large volume, high production and installation difficulty, high cost (hundreds of wind power generators with high power generation need even thousands of wind power generators), and strict site selection requirement, so that the existing large-scale wind power generator is difficult to be really popularized in other places except for an open area with sufficient wind energy, and the use of wind power generation is difficult to realize civilization.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the problems occurring in the prior art.

Therefore, the invention aims to provide a small wind driven generator which can overcome the defects that the existing large wind driven generator is large in size, high in production and installation difficulty and high in cost and is difficult to realize comprehensive popularization.

In order to solve the technical problems, the invention provides the following technical scheme: a miniature wind power generator, comprising: the bearing foundation is arranged at the bottom of the small wind driven generator; the supporting column is vertically fixed on the upper part of the bearing foundation; the power generation assembly comprises a cabin which is fixed at the top of the support column and can horizontally rotate, a stator which is fixed on the inner side wall of the cabin along the circumferential direction, and a rotor which is rotationally arranged on the inner ring of the stator along the axial direction; the outer part of the machine head is fixedly provided with a rotating shaft which extends outwards along the axial direction of the machine head, and the rotating shaft penetrates into the engine room and is fixedly connected with the rotor; the aircraft nose includes the casing, along circumference equipartition in a plurality of blades of casing periphery, with each blade transmission be connected and can unify the transmission assembly who adjusts each blade inclination to and can drive the drive assembly and carry out rotatory drive assembly.

As a preferable aspect of the small wind power generator of the present invention, wherein: the outer side wall of the support column is evenly provided with fixing rings, and each fixing ring is connected with a stay cable fixed on the ground.

As a preferable aspect of the small wind power generator of the present invention, wherein: the cabin comprises a cabin wall, a first front end cover and a first rear end cover which are detachably connected to two ends of the cabin wall respectively; the stator is fixed on the inner side wall of the bulkhead along the circumferential direction, a first bearing fixing position and a second bearing fixing position are respectively arranged on the first front end cover and the first rear end cover, and bearings are fixed in the bearing fixing positions; the rotating shaft is inserted into the cabin from the first bearing fixing position and is fixedly connected with the rotor, and the outer side wall of the rotating shaft is fixed with the bearing in the first bearing fixing position; and the other end of the rotor is fixed on the bearing in the second bearing fixing position through a rotating shaft of the rotor.

As a preferable aspect of the small wind power generator of the present invention, wherein: the winding of the stator adopts fractional slot winding, and the number of slots of each phase of each pole of the stator is irreducible fraction; the stator is electrified through the winding to excite the magnetic field, and the rotor is electrified through the winding or the permanent magnet to excite the magnetic field.

As a preferable aspect of the small wind power generator of the present invention, wherein: the inner end of each blade is fixed with a first bevel gear and is inserted into the accommodating space of the shell, and the outer end of each blade extends out of the accommodating space of the shell; the transmission assembly is arranged in the accommodating space of the shell and comprises a driving shaft extending axially and a second bevel gear fixed on the driving shaft, the second bevel gear is in meshing transmission with the first bevel gears at the same time and can drive the blades to rotate so as to change the inclination angles of the blades; the driving assembly is connected with the driving shaft and can drive the driving shaft to rotate around the axial direction of the driving shaft.

As a preferable aspect of the small wind power generator of the present invention, wherein: the shell comprises a containing shell, a second front end cover and a second rear end cover which are detachably connected to two ends of the containing shell respectively; the containing shell is internally provided with a variable pitch cavity, the outer side wall of the containing shell is provided with fixing positions corresponding to all the blades, and the variable pitch cavity is communicated with an external space through all the fixing positions; the root of each blade is provided with a limiting section matched with the fixed position, and the limiting section is arranged on the corresponding fixed position in an inserting manner; the rotating shaft is axially fixed on the outer surface of the second rear end cover.

As a preferable aspect of the small wind power generator of the present invention, wherein: the driving assembly comprises a driving cap which is connected to the second front end cover and can rotate, the outer end of the driving cap extends out of the second front end cover, the inner end of the driving cap is provided with a concave joint port, and the cross section of the joint port is square; the driving shaft comprises a cylindrical section and a square column section, the second bevel gear is fixed on the cylindrical section, and the square column section is located at the front end of the cylindrical section and inserted into the connecting port to form matching.

As a preferable aspect of the small wind power generator of the present invention, wherein: a ring-shaped locking ring is fixed at the front end of the containing shell; an annular cavity is formed in the annular locking ring, and an annular socket communicated with the annular cavity is formed in the front end of the annular locking ring; limiting grooves are uniformly distributed on the inner side wall of the annular socket along the circumferential direction; the driving assembly further comprises a limiting ring fixed on the periphery of the inner end of the driving cap, an inserting ring corresponding to the annular socket and a resetting piece arranged between the limiting ring and the annular locking ring, and a limiting bulge matched with the limiting groove is arranged on the outer side wall of the inserting ring; the limiting protrusion can be embedded into any limiting groove, and the tail end of the plug-in ring can extend into the annular cavity from the annular socket, so that the limiting protrusion and the limiting groove are separated in a staggered mode.

As a preferable aspect of the small wind power generator of the present invention, wherein: a plurality of limiting bulges corresponding to the number and the distribution positions of the limiting grooves are uniformly distributed on the outer side wall of the inserting ring along the circumferential direction; the limiting protrusions are continuously arranged and are semicircular protrusions which are mutually connected end to end, and the outline of the limiting groove is complementary with the outline of the limiting groove.

As a preferable aspect of the small wind power generator of the present invention, wherein: the inner ring of the annular locking ring is provided with a guide piece; the guide piece comprises an annular partition plate engaged with the annular locking ring and a first sleeve sleeved on the periphery of the driving shaft, and the end of the first sleeve extends to the front end of the second bevel gear; still be provided with the piece that resets between spacing ring and the guide piece, the one end of the piece that resets is fixed in on the spacing ring, the other end is fixed in on the annular baffle.

The invention has the beneficial effects that: the small wind driven generator is convenient to install, and has no strict site selection requirement on an installation site; the portable multifunctional portable handheld work apparatus is small in size, light in weight, convenient and fast to transport, capable of being assembled and used on site, and capable of being directly used in daily life and popularized in a comprehensive mode.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is an overall structural view of a small wind power generator and a partial detailed view thereof.

Fig. 2 is a sectional view of a small wind power generator.

Fig. 3 is a detailed view of the structure at a in fig. 2.

Fig. 4 is a detailed view of the structure at B in fig. 2.

Fig. 5 is an exploded view of a small wind power generator.

Fig. 6 is a detail view of a portion of the structure of fig. 5.

FIG. 7 is a view showing the structure of the housing case and the blade

Fig. 8 is a front end structure view of the housing case.

Fig. 9 is a structural view of the driving assembly and the transmission assembly.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Referring to fig. 1 to 9, an embodiment of the present invention provides a small wind turbine, which includes a bearing base 100, a supporting column 200, a power generation assembly 300 mounted on top of the supporting column 200, and a handpiece capable of driving the power generation assembly 300 to generate power.

The load-bearing foundation 100 is located at the bottom of the small wind turbine for supporting the upper structure. Load bearing foundation 100 may be secured to the ground by embedments Y (e.g., anchor rods).

The support column 200 is vertically fixed to the upper portion of the load-bearing base 100. Preferably, a plurality of fixing rings 201 uniformly distributed along the circumferential direction of the supporting column 200 are fixed on the outer side wall of the supporting column 200, and the fixing rings 201 are of an annular structure welded on the outer side wall of the supporting column 200. Each fixing ring 201 is connected with a stay cable 202 fixed on the ground. The bottom end of the stay cable 202 can also be fixed on the ground by the embedded part Y.

The power generation module 300 includes a nacelle 301 fixed to the top of the support column 200 and capable of rotating horizontally, a stator 302 fixed to the inner wall of the nacelle 301 in the circumferential direction, and a rotor 303 rotatably provided in the inner ring of the stator 302 in the axial direction. Preferably, the nacelle 301 is mounted on top of the support column 200 by a swivel flange. The stator 302 is provided with a winding, the winding of the stator 302 adopts a fractional slot winding, and the number of slots of each pole and each phase of the stator 302 is an irreducible fraction. The stator 302 of the present invention is energized by windings to excite a magnetic field, and the rotor 303 is energized by windings or permanent magnets to excite a magnetic field.

The outer part of the machine head is fixed with a rotating shaft Z which extends outwards along the axial direction of the machine head, and the rotating shaft Z penetrates into the engine room 301 and is fixedly connected with the rotor 303. Therefore, when the handpiece is rotated by wind, the rotor 303 fixedly connected thereto can be driven by the rotation shaft Z, and power generation is performed by rotation of the rotor 303 relative to the stator 302.

Specifically, the machine head comprises a shell 400, a plurality of blades 500 uniformly distributed on the periphery of the shell 400 along the circumferential direction, a transmission assembly 600 in transmission connection with each blade 500 and capable of uniformly adjusting the inclination angle of each blade 500, and a driving assembly 700 capable of driving the transmission assembly 600 to rotate. The housing 400 has an accommodating space therein, and the rotation axis Z is fixed to the outside of the housing 400 and extends outward along the axis. The drive assembly 700 preferably extends beyond the structure of the housing 400 and can be manually adjusted. After the inclination angle of the blade 500 of the machine head is adjusted, the machine head can be driven to rotate by the head-on wind, so that the rotating torque is transmitted to the rotor 303 connected with the machine head through the rotating shaft Z, and the mechanical driving power generation is realized.

A tail wing 304 is fixed to the rear end of the nacelle 301 for yaw rotation in response to the wind direction.

In conclusion, the small wind driven generator is convenient to install, and has no strict site selection requirement on an installation site; the portable multifunctional portable handheld work apparatus is small in size, light in weight, convenient and fast to transport, capable of being assembled and used on site, and capable of being directly used in daily life and popularized in a comprehensive mode.

Preferably, the nacelle 301 includes a bulkhead 301a, and a first front end cover 301b and a first rear end cover 301c detachably attached to both ends of the bulkhead 301a, respectively (the first front end cover 301b and the first rear end cover 301c may be detachably attached to both front and rear ends of the bulkhead 301a by bolts, respectively). The invention sets the following steps: the "front" in the present invention corresponds to the windward direction of the nose, and the "rear" corresponds to the overhanging direction of the tail fin 304.

Further, the stator 302 is fixed on the inner side wall of the bulkhead 301a along the circumferential direction, the first front end cover 301b and the first rear end cover 301C are respectively provided with a first bearing fixing position 301b-1 and a second bearing fixing position 301C-1, and bearings C are fixed in the first bearing fixing position 301b-1 and the second bearing fixing position 301C-1; the first bearing fixing station 301b-1 and the second bearing fixing station 301C-1 in the present invention may be annular chambers fitted to the bearings C.

The rotating shaft Z is inserted into the cabin 301 from an insertion opening at the center of the first bearing fixing position 301b-1 and is fixedly connected with the rotor 303, and the outer side wall of the rotating shaft Z is fixed with the inner ring of the bearing C in the first bearing fixing position 301 b-1; the other end of the rotor 303 is fixed to the bearing C in the second bearing fixing position 301C-1 through its own rotating shaft, so that the rotating shaft Z can drive the rotor 303 to rotate synchronously.

Further, a plurality of (preferably 3) blades 500 are provided, a first bevel gear 501 is fixed to an inner end of each blade 500 and inserted into the receiving space of the housing 400, and an outer end of each blade 500 extends out of the receiving space.

The transmission assembly 600 is disposed in the accommodating space of the housing 400, and includes a driving shaft 601 extending axially and a second bevel gear 602 fixed on the driving shaft 601, wherein the second bevel gear 602 is engaged with each first bevel gear 501 for transmission, so that when the driving shaft 601 is rotated by an external force, the second bevel gears 602 rotating synchronously can drive each blade 500 to rotate to change the inclination angle of the blade 500.

The driving assembly 700 is connected to the driving shaft 601 and can drive the driving shaft 601 to rotate around its own axis. Therefore, the blades 500 can be controlled to uniformly adjust the inclination angle by rotating the driving assembly 700, so that the pitch variation is realized.

Further, the housing 400 includes a containing shell 401, and a second front end cover 402 and a second rear end cover 403 detachably connected to two ends of the containing shell 401, which together enclose an inner containing space.

The interior of the housing shell 401 has a pitch chamber 401a, and the pitch chamber 401a provides a space for the connection and transmission of the first bevel gear 501 and the second bevel gear 602. The outer side wall of the containment shell 401 is provided with a fixing location 401b corresponding to each blade 500, each fixing location 401b communicating the pitch chamber 401a with the external space. Preferably, the fixing portion 401b may be a sleeve-shaped structure integrally formed on the housing shell 401. The root of each blade 500 is provided with the spacing section 502 that cooperates in fixed position 401b, and spacing section 502 is for cooperating the ring channel in fixed position 401b internal diameter, and each blade 500 can be installed on the fixed position 401b that corresponds through spacing section 502 interlude, realizes spacing and fixed. The rotation axis Z is axially fixed to the outer surface of the second rear cover 403, and is preferably integrally formed on the second rear cover 403.

Further, the driving assembly 700 includes a driving cap 701 rotatably connected to the second front cover 402, and the driving cap 701 may be a stub structure extending axially.

The outer end of the driving cap 701 extends out of the second front end cover 402 for manual operation and torsion; the inner end of the driving cap 701 is provided with a concave adaptor port 701a, and the cross section of the adaptor port 701a is square.

The driving shaft 601 comprises a cylindrical section 601a and a square column section 601b, any cross section of the cylindrical section 601a is circular, any cross section of the square column section 601b is square, and the outer diameter of the circle is not larger than the side length of the square. The second bevel gear 602 is fixed on the cylindrical section 601a, and the square cylindrical section 601b is located at the front end of the cylindrical section 601a and is inserted into the adapter port 701a to form a fit. Thus, the square column segment 601b is capable of relative axial linear sliding movement within the adaptor 701a, but is incapable of relative circumferential rotation.

The inner side wall of the second rear cover 403 is provided with a rotation fixing position 403a, the rotation fixing position 403a is an annular structure that opens inward, and the rear end of the cylindrical section 601a is fixed inside the rotation fixing position 403a through a bearing C, so that the driving shaft 601 can rotate.

Further, a ring-shaped locking ring 401c is fixed (integrally formed) to the front end of the housing case 401. The interior of the annular locking ring 401C is provided with an annular cavity 401C-1, and the front end of the annular locking ring 401C is provided with an annular socket 401C-2 communicated with the annular cavity 401C-1, so that any longitudinal section of the annular locking ring 401C is of a C-shaped structure with an opening at the front end.

A plurality of limiting grooves 401c-21 with the same specification are uniformly distributed on the inner side wall of the annular socket 401c-2 along the circumferential direction, each limiting groove 401c-21 is a through groove with two axially extending ends, and the limiting grooves are densely distributed on the inner side wall of the annular socket 401c-2 to form a circle.

Meanwhile, the driving assembly 700 further comprises a limiting ring 702 fixed on the periphery of the inner end of the driving cap 701 and a plug-in ring 703 corresponding to the annular socket 401 c-2. The limiting ring 702 is an annular baffle plate which is axially vertical to the driving cap 701; the plug ring 703 is a sleeve structure engaged at the end of the stop collar 702, and can be inserted into the annular socket 401 c-2.

The outer side wall of the insert ring 703 is provided with a limit protrusion 703a which is matched with the contour of the limit groove 401 c-21. The retention bump 703a can be inserted into any of the retention grooves 401c-21 such that the bayonet ring 703 (i.e., the drive assembly 700 as a whole) cannot rotate circumferentially relative to the annular locking ring 401 c. In addition, the end of the docking ring 703 can also extend from the annular socket 401c-2 into the annular chamber 401c-1, so that the spacing protrusion 703a is misaligned and disengaged from the spacing groove 401c-21, thereby enabling circumferential rotation of the docking ring 703 (i.e., the drive assembly 700 as a whole) relative to the annular locking ring 401 c.

Therefore, whether the driving assembly 700 can rotate relative to the annular locking ring 401c can be indirectly controlled by controlling whether the position-limiting protrusion 703a and the position-limiting grooves 401c-21 are staggered or not; since the driving assembly 700 is integrated with the driving shaft 601, the relative circumferential rotation cannot occur, and therefore, the process of driving the driving assembly 700 to drive each driving shaft 601 and each blade 500 is finally realized.

Preferably, a plurality of limiting protrusions 703a corresponding to the number and distribution positions of the limiting grooves 401c-21 are uniformly distributed on the outer side wall of the plug-in ring 703 along the circumferential direction. The limiting protrusions 703a are semicircular protrusions which are continuously arranged and are mutually connected end to end, and the outlines of the limiting grooves 401c-21 are complementary with the semicircular protrusions.

Further, the driving assembly 700 further includes a reset member 704 disposed between the limiting ring 702 and the annular locking ring 401c, and the reset member 704 is a compression spring.

In the initial state, when pressed by the reset piece 704, the driving assembly 700 is pressed against the inner side of the second front end cap 402; at this time, each limit protrusion 703a of the plug ring 703 can be just inserted into the corresponding limit groove 401c-21, so that the driving assembly 700 cannot rotate as a whole, and the driving assembly 700 does not have a driving adjustment function for the driving shaft 601 and each blade 500. And this state can be maintained stably by the pressing of the restoring member 704.

When the exposed driver cap 701 is manually pressed by an external force, the insert ring 703 can gradually slide inward over the annular socket 401c-2 and extend into the annular chamber 401 c-1; therefore, the limit protrusion 703a forming the dislocation and the limit groove 401c-21 do not have circumferential rotation restriction; at this time, the driving cap 701 may be manually rotated to drive the driving shaft 601 to rotate, and the second bevel gear 602 on the driving shaft 601 may drive the first bevel gears 501 to rotate in unison, that is, drive the blades 500 to rotate, so as to change the inclination angles of the blades 500.

After the blade 500 is adjusted to the desired pitch angle, the driving cap 701 is slowly released and a slight attempt is made to rotate the driving cap 701 slightly so that the limit protrusions 703a thereof can be inserted into the nearest limit grooves 401c-21, and finally the initial stable state is restored again by the restoring action of the restoring member 704.

In summary, the blade 500 of the present invention is convenient to adjust the inclination angle, and the uniform adjustment process of the inclination angle of each blade 500 can be realized only by pressing and rotating the driving cap 701. The blade 500 of the present invention is preferably drop-shaped in cross-section and its pitch angle is adjusted primarily to adjust the angle of its outer side with respect to the direction of the wind.

Further, the inner ring of the annular locking ring 401c is provided with a guide 401 c-3. The guide member 401c-3 includes an annular partition 401c-31 integrally engaged with the annular locking ring 401c and a first sleeve 401c-32 fitted around the outer periphery of the driving shaft 601, the annular partition 401c-31 and the first sleeve 401c-32 are engaged with each other to form an annular structure having an L-shaped longitudinal section.

The ends of the first sleeves 401c-32 extend to the front end of the second bevel gear 602, so that the drive shaft 601 can maintain a stable spatial position and can only rotate by itself under the restriction of forward and backward clamping of the first sleeves 401c-32 and the rotation fixing positions 403 a.

The restoring member 704 may be disposed between the retainer ring 702 and the guide member 401 c-3. in this embodiment, one end of the restoring member 704 is fixed to the retainer ring 702 and the other end is fixed to the annular partition 401 c-31.

Further, the rear end of the annular locking ring 401c is provided with a stiffening rib 401c-4 for improving the structural strength of the annular locking ring 401 c.

Further, the edge of the second front end cover 402 is detachably connected to the front end of the housing case 401 by a bolt L, and a passage 402a fitted to the driving cap 701 is provided at the center of the second front end cover 402 to facilitate the penetration of the driving cap 701.

The inner port of the passage 402a is provided with a second sleeve 402b fitted to the outer diameter of the driving cap 701; the limiting ring 702 is pressed by the reset piece 704 and can abut against the inner end of the second sleeve 402b, and at this time, each limiting protrusion 703a can be completely embedded into the corresponding limiting groove 401 c-21.

Further, the edge of the second rear end cap 403 is detachably connected to the rear end of the accommodation case 401 by a bolt L.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (4)

1. A small-sized wind power generator is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the bearing foundation (100) is arranged at the bottom of the small wind driven generator;

the supporting column (200) is vertically fixed at the upper part of the bearing foundation (100);

the power generation assembly (300) comprises a cabin (301) fixed on the top of the supporting column (200) and capable of horizontally rotating, a stator (302) fixed on the inner side wall of the cabin (301) along the circumferential direction, and a rotor (303) rotatably arranged at the inner ring of the stator (302) along the axial direction; and the number of the first and second groups,

the outer part of the machine head is fixedly provided with a rotating shaft (Z) extending outwards along the axial direction of the machine head, and the rotating shaft (Z) penetrates into the engine room (301) and is fixedly connected with the rotor (303); the machine head comprises a shell (400), a plurality of blades (500) uniformly distributed on the periphery of the shell (400) along the circumferential direction, a transmission assembly (600) in transmission connection with each blade (500) and capable of uniformly adjusting the inclination angle of each blade (500), and a driving assembly (700) capable of driving the transmission assembly (600) to rotate;

a first bevel gear (501) is fixed at the inner end of each blade (500) and is inserted into the accommodating space of the shell (400), and the outer end of each blade extends out of the accommodating space of the shell (400);

the transmission assembly (600) is arranged in the accommodating space of the shell (400) and comprises a driving shaft (601) extending axially and a second bevel gear (602) fixed on the driving shaft (601), the second bevel gear (602) is meshed with each first bevel gear (501) for transmission simultaneously, and can drive each blade (500) to rotate to change the inclination angle of the blade (500);

the driving assembly (700) is connected with the driving shaft (601) and can drive the driving shaft (601) to rotate around the axial direction of the driving shaft;

the shell (400) comprises a containing shell (401), and a second front end cover (402) and a second rear end cover (403) which are detachably connected to two ends of the containing shell (401) respectively;

the containing shell (401) is internally provided with a variable pitch cavity (401 a), the outer side wall of the containing shell is provided with a fixing position (401 b) corresponding to each blade (500), and each fixing position (401 b) enables the variable pitch cavity (401 a) to be communicated with the external space; the root of each blade (500) is provided with a limiting section (502) matched with the fixed position (401 b), and the limiting sections (502) are arranged on the corresponding fixed positions (401 b) in a penetrating manner;

the rotating shaft (Z) is axially fixed on the outer surface of the second rear end cover (403);

the driving assembly (700) comprises a driving cap (701) which is connected to the second front end cover (402) and can rotate, the outer end of the driving cap (701) extends out of the second front end cover (402), the inner end of the driving cap is provided with a concave connecting port (701 a), and the cross section of the connecting port (701 a) is square;

the driving shaft (601) comprises a cylindrical section (601 a) and a square column section (601 b), the second bevel gear (602) is fixed on the cylindrical section (601 a), the square column section (601 b) is located at the front end of the cylindrical section (601 a) and is inserted into the adapter port (701 a) to form matching;

a ring-shaped locking ring (401 c) is fixed at the front end of the containing shell (401); the interior of the annular locking ring (401 c) is provided with an annular cavity (401 c-1), and the front end of the annular locking ring (401 c) is provided with an annular socket (401 c-2) communicated with the annular cavity (401 c-1); limiting grooves (401 c-21) are uniformly distributed on the inner side wall of the annular socket (401 c-2) along the circumferential direction;

the driving assembly (700) further comprises a limiting ring (702) fixed on the periphery of the inner end of the driving cap (701), an inserting ring (703) corresponding to the annular socket (401 c-2), and a resetting piece (704) arranged between the limiting ring (702) and the annular locking ring (401 c), wherein a limiting protrusion (703 a) matched with the limiting groove (401 c-21) is arranged on the outer side wall of the inserting ring (703);

the limiting protrusion (703 a) can be embedded into any limiting groove (401 c-21), and the tail end of the plug-in ring (703) can extend into the annular cavity (401 c-1) from the annular socket (401 c-2), so that the limiting protrusion (703 a) and the limiting groove (401 c-21) are separated in a staggered mode;

a plurality of limiting protrusions (703 a) corresponding to the number and the distribution positions of the limiting grooves (401 c-21) are uniformly distributed on the outer side wall of the plug-in ring (703) along the circumferential direction;

the limiting protrusions (703 a) are semicircular protrusions which are continuously arranged and are mutually connected end to end, and the outlines of the limiting grooves (401 c-21) are complementary with the limiting protrusions;

the inner ring of the annular locking ring (401 c) is provided with a guide (401 c-3);

the guide piece (401 c-3) comprises an annular partition plate (401 c-31) engaged with the annular locking ring (401 c) and a first sleeve (401 c-32) sleeved on the periphery of the driving shaft (601), and the end of the first sleeve (401 c-32) extends to the front end of the second bevel gear (602);

a reset piece (704) is further arranged between the limiting ring (702) and the guide piece (401 c-3), one end of the reset piece (704) is fixed on the limiting ring (702), and the other end of the reset piece (704) is fixed on the annular partition plate (401 c-31).

2. The small wind power generator as set forth in claim 1, wherein: the outer side wall of the supporting column (200) is evenly provided with fixing rings (201), and each fixing ring (201) is connected with a stay cable (202) fixed on the ground.

3. A small wind power generator as claimed in claim 1 or 2, wherein: the cabin (301) comprises a bulkhead (301 a) and a first front end cover (301 b) and a first rear end cover (301 c) which are detachably connected to two ends of the bulkhead (301 a) respectively;

the stator (302) is fixed on the inner side wall of the bulkhead (301 a) along the circumferential direction, a first bearing fixing position (301 b-1) and a second bearing fixing position (301C-1) are respectively arranged on the first front end cover (301 b) and the first rear end cover (301C), and a bearing (C) is fixed in each bearing fixing position;

the rotating shaft (Z) is inserted into a cabin (301) from the first bearing fixing position (301 b-1) and is fixedly connected with the rotor (303), and the outer side wall of the rotating shaft (Z) is fixed with a bearing (C) in the first bearing fixing position (301 b-1); the other end of the rotor (303) is fixed on a bearing (C) in the second bearing fixing position (301C-1) through a rotating shaft of the rotor.

4. A miniature wind power generator as set forth in claim 3, wherein: the winding of the stator (302) adopts fractional slot winding, and the number of slots of each pole and each phase of the stator (302) is a fraction irreducible real fraction;

the stator (302) is electrified through a winding to excite a magnetic field, and the rotor (303) is electrified through a winding or a permanent magnet to excite a magnetic field.

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