CN113187655A

CN113187655A - Vertical shaft dual-drive wind power generation device

Info

Publication number: CN113187655A
Application number: CN202110577345.3A
Authority: CN
Inventors: 苏卫星; 苏志伟; 苏志超; 苏志丹
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-07-30

Abstract

The invention discloses a vertical shaft dual-drive wind power generation device, which comprises a generator, an inner fan blade assembly and an outer fan blade assembly, wherein the inner fan blade assembly and the outer fan blade assembly are used for respectively driving an outer rotor and an inner rotor of the generator to rotate; the outer fan blade shaft is coaxially sleeved on the outer side of the inner fan blade shaft, a gap is formed between the outer fan blade shaft and the inner fan blade shaft, and the outer fan blade shaft is fixed on an outer shell of the generator; the outer fan blade assembly is arranged around the periphery of the inner fan blade assembly and is fixed with the inner fan blade shaft through an upper fixing frame and a lower fixing frame. According to the vertical shaft power generation device, the inner fan blade assembly and the outer fan blade assembly are opposite in rotation direction, the outer fan blade assembly is arranged around the inner fan blade assembly and shares the same height space with the inner fan blade assembly, the height of the vertical shaft power generation device is reduced, the stability is improved, the cost is reduced, and meanwhile the power generation efficiency is improved.

Description

Vertical shaft dual-drive wind power generation device

Technical Field

The invention relates to the technical field of wind power generation devices, in particular to a vertical shaft dual-drive wind power generation device.

Background

The wind power generation device is one of the most important forms of clean and renewable green energy sources, and is more and more widely applied. However, since the power output of the wind power generator is low, how to improve the conversion rate of wind energy is a key technology of the wind power generation device, and the improvement of the output power is always a key point of the development of the wind power generation device.

Chinese patent CN 104747380a discloses a vertical axis wind turbine, which includes a wind wheel and a generator, wherein the generator includes an inner rotor and an outer rotor, the wind wheel includes a first wind wheel and a second wind wheel, the first wind wheel drives the inner rotor of the generator to rotate, the second wind wheel drives the outer rotor of the generator to rotate, and the first wind wheel and the second wind wheel are opposite in rotation direction. According to the scheme, the inner rotor and the outer rotor are driven by the first wind wheel and the second wind wheel respectively to rotate relatively, so that the relative rotating speed between the inner rotor and the outer rotor is improved, and the power output is increased. However, this solution has the following problems:

1. the first wind wheel and the second wind wheel are arranged up and down, and the vertical occupied space is large.

2. The stability is poor due to the fact that the vertical height is large, the bearing capacity of the central shaft is large, and the service life is short.

In view of the above, there is an urgent need for improvement of the conventional vertical axis wind turbine to improve the power generation efficiency, reduce the overall vertical height, improve the stability and prolong the service life.

Disclosure of Invention

In view of the above drawbacks, the invention provides a vertical axis dual-drive wind power generation device to solve the problems of large vertical occupied space, poor stability and short service life of the conventional wind power generation device.

Therefore, the invention provides a vertical shaft double-drive wind power generation device, which comprises a generator, an inner fan blade component for driving an outer rotor of the generator to rotate and an outer fan blade component for driving an inner rotor of the generator to rotate, wherein the rotation directions of the inner fan blade component and the outer fan blade component are opposite,

the outer rotor is composed of an outer shell of the generator, the inner rotor is arranged inside the outer shell and fixed with a fan blade outer shaft which is vertically arranged, the fan blade outer shaft is coaxially sleeved outside a fan blade inner shaft, and a gap is formed between the fan blade outer shaft and the fan blade inner shaft;

the inner fan blade assembly is fixed with the fan blade outer shaft, and the fan blade outer shaft is fixed with the outer shell of the generator;

the outer fan blade assembly is coaxially arranged around the periphery of the inner fan blade assembly and is fixed with the inner fan blade shaft through an upper fixing frame and a lower fixing frame.

In the above technical solution, preferably, the wind turbine further includes a support shaft seat in a vertical sleeve shape, a stepped bearing hole is formed at an upper end of a shaft hole of the support shaft seat, a first bearing is installed in the stepped bearing hole and axially fixed to an outer ring of the first bearing, and a shaft shoulder is formed at a matching position of an inner shaft of the wind blade and the first bearing and axially fixed to an inner ring of the first bearing; and a second bearing is arranged at the lower end of the shaft hole of the support shaft seat, and the lower end of the inner shaft of the fan blade is inserted in the second bearing.

In the above technical scheme, preferably, the inner fan blade assembly includes a first blade and a second blade, which are respectively fixed on the outer shaft of the fan blade, the first blade and the second blade have the same structure, the windward side is an arc-shaped surface spirally arranged from top to bottom, and the windward sides of the first blade and the second blade are arranged in a 180-degree reverse symmetry manner.

In the above technical solution, preferably, the outer casing of the generator is assembled by an upper cover and a lower cover, and a flange is provided at the lower end of the outer shaft of the fan blade and fixed to the upper end face of the upper cover through the flange; the upper end surface of the upper cover is provided with a positioning ring around the central shaft hole, and the positioning ring is inserted into a gap between the inner shaft of the fan blade and the outer shaft of the fan blade.

In the above technical solution, preferably, the windward side of the first blade forms an S shape on the horizontal projection plane, and is assembled by a plurality of arc-shaped blades from top to bottom.

In the above technical solution, preferably, the arc-shaped blade is fixed on the blade outer shaft through a fixing seat, the fixing seat is a rectangular block structure, a first fixing through hole is horizontally arranged in the center of the fixing seat, a second fixing through hole and a third fixing through hole are respectively arranged on two sides of the first fixing through hole, and the second fixing through hole and the third fixing through hole are respectively parallel to the first fixing through hole and are arranged at intervals;

first fixing bolt passes first fixing hole and fixes the fixing base at the outer epaxial of fan blade, and the arc blade on the first blade passes through first dead lever to be fixed on the fixing base, and the arc blade on the second blade passes through the second dead lever to be fixed on the fixing base.

In the above technical solution, preferably, the first fixing rod connecting the arc-shaped blade at the uppermost end of the first blade, and the first fixing rod connecting the arc-shaped blade at the lowermost end of the first blade are parallel to each other and spaced apart from each other.

In the above technical solution, preferably, the lower fixing frame includes:

the lower fixing pipe is sleeved and fixed on the upper part of the inner shaft of the fan blade, and the lower end of the lower fixing pipe is provided with a step shaft of which the outer circumferential surface is small at the bottom and large at the top;

the lower fan blade fixing piece is provided with a bottom disc, and a plurality of upper fixing plates which extend upwards and obliquely are arranged on the outer edge of the bottom disc; the bottom disc is sleeved on the step shaft, and an annular sleeve is arranged on the bottom surface of the bottom disc; the upper end of the supporting shaft seat is inserted into the annular sleeve;

and the second fan blade of the outer fan blade assembly is fixed on the upper fixing plate.

In the above technical solution, preferably, the upper fixing frame includes:

the upper fixing pipe is sleeved and fixed at the lower part of the inner shaft of the fan blade, the lower end of the lower fixing pipe is provided with an annular flange, the bottom surface of the annular flange is provided with an annular groove, and the upper end of the outer shaft of the fan blade is inserted into the annular groove;

the upper fan blade fixing piece is provided with a top disc, and the outer edge of the top disc is provided with a plurality of upper fixing plates with the lower ends extending outwards in an inclined mode;

the upper end of the second fan blade is fixed on the upper fixing plate.

In the above technical scheme, preferably, a fifth bearing is arranged at the upper end of the outer shaft of the fan blade, and the inner wall of the annular groove abuts against an inner ring of the fifth bearing to form an axial fixing structure.

According to the technical scheme, the vertical shaft dual-drive wind power generation device solves the problems of large vertical occupied space, poor stability and short service life in the prior art. Compared with the prior art, the invention has the following beneficial effects:

the wind and outer fan blade assemblies are opposite in rotation direction, the outer fan blade assemblies are arranged around the inner fan blade assemblies and share the same height space with the inner fan blade assemblies, the height of the vertical shaft power generation device is reduced, the stability is improved, the cost is reduced, and meanwhile the power generation efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of an embodiment of a vertical axis dual drive wind turbine provided in the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 2;

FIG. 4 is a schematic view of an inner fan blade assembly according to the present invention;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a schematic view of an outer fan blade assembly according to the present invention;

FIG. 7 is a schematic view of the lower fixture of the present invention;

FIG. 8 is a schematic view of an upper fixing frame according to the present invention;

fig. 9 is an enlarged view of a portion C in fig. 1.

In fig. 1 to 9, the correspondence between the components is as follows:

the wind power generation device comprises a supporting shaft seat 10, a generator 20, an inner fan blade assembly 30, an outer fan blade assembly 40 and a lightning rod 50;

a connecting flange 11, a first bearing 12, a second bearing 13;

upper cover 211, lower cover 212, annular magnetic steel 213, third bearing 214, positioning ring 215, and fourth bearing 216;

a shell 21, an inner rotor 22 and a fan blade inner shaft 23;

a first annular boss 231, a fifth bearing 232;

the fan blade fixing device comprises a first blade 31, a second blade 32, a fan blade outer shaft 33, a fixing seat 34, a first fixing bolt 35, a first fixing rod 36 and a second fixing rod 37;

a flange 331;

a second fan blade 41, a lower fixing frame 42 and an upper fixing frame 43;

a lower fixing tube 421, a lower fan blade fixing member 422, a bottom disc 423, a lower fixing plate 424, a step shaft 425 and an annular sleeve 426;

an upper fixing tube 431, an upper vane fixing member 432, a top disc 433, an upper fixing plate 434, an annular flange 435, an annular groove 436;

and the nut 51 is locked, and the pressing plate 52 is locked.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below 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 of the present invention without any inventive step, are within the scope of the present invention.

The realization principle of the invention is as follows:

the inner fan blade assembly is fixed with a fan blade outer shaft, and the fan blade outer shaft is fixed with the outer shell of the generator; the outer fan blade assembly is coaxially arranged around the periphery of the inner fan blade assembly and is fixed with the inner fan blade shaft through the upper fixing frame and the lower fixing frame, the outer fan blade shaft is coaxially sleeved on the outer side of the inner fan blade shaft, and the rotating directions of the inner fan blade assembly and the outer fan blade assembly are opposite.

According to the scheme provided by the invention, the outer fan blade assembly is arranged around the inner fan blade assembly and shares the same height space with the inner fan blade assembly, so that the height of the vertical shaft power generation device is reduced, the stability is improved, the cost is reduced, and the power generation efficiency is improved.

In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.

It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.

Referring to fig. 1 and 2, fig. 1 is a vertical axis dual-drive wind turbine generator according to the present invention, fig. 2 is an enlarged view of a portion a in fig. 1, and fig. 3 is an enlarged view of a portion B in fig. 2.

As shown in fig. 1 and 2, the vertical axis dual-drive wind power generation device provided by the invention comprises a support shaft seat 10, a generator 20, an inner fan blade assembly 30 and an outer fan blade assembly 40.

In the present embodiment, the generator 20 is a disk generator, and includes a housing 21 and an inner rotor 22 disposed in the housing 21, and the housing 21 constitutes the outer rotor of the generator 20. The inner fan blade assembly 30 drives the outer rotor to rotate, the outer fan blade assembly 40 drives the inner rotor 22 to rotate, and the inner fan blade assembly 30 and the outer fan blade assembly 40 are arranged in opposite rotating directions, so that the inner rotor and the outer rotor rotate relatively, the relative rotating speed between the inner rotor and the outer rotor is improved, and the power generation efficiency is improved.

Referring to fig. 1 again, the supporting shaft seat 10 is a hollow shaft structure, and a connecting flange 11 is provided at a lower end of the supporting shaft seat for fixing the supporting shaft seat 10 to a bottom bracket or a bottom base.

The supporting shaft seat 10 is in a vertical sleeve shape, a first bearing 12 is arranged at the upper end of a shaft hole of the supporting shaft seat, a second bearing 13 is arranged at the lower end of the shaft hole, and the second bearing 13 has a certain distance from the bottom surface of the supporting shaft seat 10.

Referring to fig. 2 and 3 again, the housing 21 of the generator 20 is formed by combining an upper cover 211 and a lower cover 212 relatively, the lower end surface (inner side surface) of the upper cover 211 and the upper end surface (inner side surface) of the lower cover 212 are respectively provided with an annular magnetic steel 213, the inner rotor 22 is a disc winding structure and is formed by laminating a plurality of layers of disc windings, the upper surface and the lower surface are respectively provided with an annular groove which are oppositely arranged, and the end surface of the annular magnetic steel 213 extends into the annular groove.

The inner shaft 23 of the fan blade is a hollow shaft structure, and is located at the position inside the generator 20, a first annular boss 231 is arranged on the outer circumferential surface of the inner shaft 23, the inner rotor 22 is sleeved on the inner shaft 23 of the fan blade and is fixed with the inner shaft 23 of the fan blade through a key connection structure, the lower end surface of the inner rotor 22 is abutted against the upper end surface of the first annular boss 231, and the inner rotor 22 is driven to rotate by the inner shaft 23 of the fan blade.

The lower end of the central shaft hole of the upper cover 211 is embedded with a third bearing 214, an adjusting ring is sleeved between the inner rotor 22 and the third bearing 214 and used for limiting the inner rotor 22 axially and supporting against the inner ring of the third bearing 214 in a matching way, and the outer ring of the third bearing 214 is supported against by a corresponding structure on the upper cover 211.

The upper end of the central shaft hole of the lower cover 212 is embedded with a fourth bearing 216, the inner ring of the fourth bearing 216 abuts against the lower end surface of the first annular boss 231, and the outer ring of the fourth bearing 216 abuts against a corresponding structure on the lower cover 212.

The upper cover 211 and the lower cover 212 are fixed at the outer edges by a plurality of bolts uniformly distributed in the circumferential direction, and are combined to form the shell 21 of the generator.

The lower part of the fan blade inner shaft 23 is inserted into the support shaft seat 10 from top to bottom, the first bearing 12 adopts a thrust bearing, a shaft shoulder is arranged at the matching part of the fan blade inner shaft 23 and the first bearing 12, and the shaft shoulder at the position of the fan blade inner shaft 23 props against the inner ring of the first bearing 12, so that the axial fixation of the inner ring of the first bearing 12 is realized. Be equipped with stepped bearing hole on the inner wall of support axle bed 10 upper end, first bearing 12 is installed in this bearing hole to support the outer lane of first bearing 12 through the step here, realized the outer lane axial fixity to first bearing 12, the gravity transmission structure who forms from this is:

the upper weight of the inner shaft 23 is transmitted to the first bearing 12 and then transmitted to the support shaft seat 10 through the first bearing 12. The entire gravitational load is taken up by the first bearing 12 and the support shaft seat 10.

The lower end of the fan blade inner shaft 23 is inserted in the second bearing 13, and the second bearing 13 does not bear the weight of, so that the fan blade inner shaft 23 can rotate flexibly and the coaxiality is ensured. And after the lower end of the fan blade inner shaft 23 downwards penetrates out of the second bearing 13, the slip ring device is sleeved and axially fixed through a nut and a spring gasket. The bottom surface of the connecting flange 11 is higher than the nut, so that the supporting shaft seat 10 can protect the lower end of the fan blade inner shaft 23 and the collecting ring device.

As shown in fig. 4 and 5, the inner blade assembly 30 includes a first blade 31, a second blade 32, and a blade outer shaft 33.

The first blade 31 and the second blade 32 have the same structure and are fixed on the outer shaft 33 of the fan blade through the fixing seat 34, the windward surfaces of the first blade and the second blade are arc surfaces which are spirally arranged, and the windward surfaces of the first blade and the second blade are arranged in a 180-degree reverse symmetry manner.

The windward side of the first blade 31 forms an S shape on the horizontal projection plane, and is assembled by a plurality of arc-shaped blades from top to bottom. The fixed rod of the arc-shaped blade connected with the uppermost end of the first blade is parallel to the fixed rod of the arc-shaped blade connected with the lowermost end of the first blade at intervals.

Taking the first blade 31 as an example, the first blade 31 is composed of 6 arc-shaped blades from top to bottom, and two arc-shaped blades oppositely arranged on the first blade 31 and the second blade 32 are respectively fixed on the blade outer shaft 33 through a fixing seat 34.

The fixing base 34 is a rectangular block structure, a first fixing through hole is horizontally disposed in the center of the fixing base, a second fixing through hole and a third fixing through hole are respectively disposed on two sides of the first fixing through hole, and the second fixing through hole and the third fixing through hole are respectively parallel to the first fixing through hole and are disposed at intervals.

First fixing bolt 35 passes first fixing through hole and fixes fixing base 34 on outer axle 33 of fan blade, and the last arc blade of first blade 31 passes through first dead lever 36 to be fixed on fixing base 34, and the last arc blade of second blade 32 passes through second dead lever 37 to be fixed on fixing base 34.

The cambered surface bending directions of the arc-shaped blades of the first blade 31 and the second blade 32 are opposite, and the two arc-shaped blades at the same horizontal position are symmetrically arranged at 180 degrees, and the cambered surface is a windward surface and generates driving force under the action of wind.

Fig. 5 is a top view of the inner fan assembly, wherein the x-axis and the y-axis are defined to illustrate the position relationship between the first blade 31 and the second blade, and the x-axis and the y-axis are not absolutely defined here.

As shown in fig. 5, the opening edge of the top surface of the uppermost arc-shaped blade of the first blade 31 is fixed to the fixing base 34 by a first fixing rod 36, the first fixing rod 36 is parallel to the X-axis and is located above the X-axis, and the distance between the first fixing rod 36 and the X-axis is s. In fig. 5, hatched areas indicate the inner blade assemblies 30, and blank areas indicate the inner blade assemblies 30.

The opening edge of the bottom surface of the arc-shaped blade at the lowest end of the first blade 31 is fixed with another fixed seat 34 through another first fixed rod 36, the first fixed rod 36 is also parallel to the X axis and is positioned below the X axis, and the distance between the first fixed rod 36 and the X axis is also s.

That is, the fixing rod connecting the uppermost arc-shaped blade of the first blade 31 and the fixing rod connecting the lowermost arc-shaped blade of the first blade 31 are parallel to each other and symmetrically spaced with respect to the x-axis.

According to the design, all the arc-shaped blades are assembled from top to bottom, after the first blade 31 and the second blade 32 are obtained, the windward surfaces of the first blade 31 and the second blade 32 are in opposite spiral shapes, and the wind coming from any direction can act on the first blade 31 and the second blade 32 to generate thrust, so that the starting force of the first blade 31 and the second blade 32 is reduced.

Referring to fig. 3, a flange 331 is disposed at the lower end of the outer shaft 33 of the fan blade, and the bottom surface of the flange 331 is disposed on the top surface of the upper cover 211 of the generator and fixed by bolts, so that the outer shaft 33 of the fan blade drives the outer casing 21 of the generator to rotate, and drives the outer rotor of the generator to rotate.

For the vertical axis generator, the inner shaft of the fan blade is thin and long, the outer shaft 33 of the fan blade is sleeved outside the inner shaft 23 of the fan blade, and the coaxiality between the inner shaft and the outer shaft has great influence on the performance of the generator. Particularly, only an end face connection fixing structure can be adopted between the fan blade outer shaft 33 and the outer casing 21, and the fixing structure causes large errors during assembly and is difficult to ensure high coaxial precision. For this reason, the scheme of the invention adopts the following design.

Referring to fig. 3 again, the upper end surface of the upper cover 211 is provided with a positioning ring 215 around the central hole, and the positioning ring 215 is inserted into the space between the fan blade inner shaft 23 and the fan blade outer shaft 33, so that the fan blade outer shaft 33 is accurately positioned, the coaxiality between the fan blade outer shaft 33 and the fan blade inner shaft 23 can be improved, the loss is reduced, the efficiency is improved, and the service life is prolonged.

Referring to fig. 1 and 5 again, the outer fan blade assembly 40 is fixed on the fan blade inner shaft 23 by a plurality of second fan blades 41 through a lower fixing frame 42 and an upper fixing frame 43. An outer fan assembly 40 is disposed about the inner fan assembly 30.

In this embodiment, the second blades 41 are C-shaped, and are uniformly arranged along the circumferential direction.

As shown in fig. 6, the lower fixing frame 42 includes a lower fixing tube 421 and a lower blade fixing member 422 fixed on an outer circumferential surface of the lower fixing tube 421.

The lower fixing tube 421 is sleeved on the blade inner shaft 23 of the generator and fixed with the blade inner shaft 23 through a bolt penetrating in the radial direction.

The lower blade fixing member 422 has a bottom disc 423, and a plurality of lower fixing plates 424 extending upward and downward are disposed on an outer edge of the bottom disc, and the number of the lower fixing plates 424 is the same as that of the second blades 41, and the lower fixing plates are used for fixing the second blades 41. In this embodiment, the second blade 41 is C-shaped and has three pieces, so that the lower fixing plates 424 are also provided with three pieces, which are uniformly arranged along the circumferential direction, and the adjacent lower fixing plates 424 are arranged at intervals of 120 degrees.

The lower end of the lower fixed tube 421 is provided with a step shaft 425 with an outer circumferential surface with a smaller lower part and a larger upper part, the bottom disc 423 is sleeved on the step shaft 425 at the lower end of the lower fixed tube 421, the bottom surface of the bottom disc 423 is provided with an annular sleeve 426, and the annular sleeve 426 provides the following two functions, namely, positioning. And secondly, the bearing below the bearing is protected, so that dust and sundries are prevented from entering the bearing, and the service life of the bearing is prolonged.

As shown in fig. 7, the upper mount 43 includes an upper mount pipe 431 and an upper vane mount 432 fixed on an outer circumferential surface of the upper mount pipe 431.

The upper fixing pipe 431 is sleeved on a fan blade inner shaft of the generator and is fixed with the fan blade inner shaft through a bolt penetrating in the radial direction.

The upper blade fixing member 432 has a top disk 433, and a plurality of upper fixing plates 434 extending with lower ends thereof being inclined outward are provided at outer edges thereof, and the number of the upper fixing plates 434 is the same as that of the second blades for fixing the second blades. In this embodiment, there are three second blades, so that there are three upper fixing plates 434, which are uniformly arranged along the circumferential direction, and the adjacent upper fixing plates 434 are arranged at an interval of 120 degrees.

An annular flange 435 is provided at the lower end of the upper fixing tube 431, and an annular groove 436 is provided on the bottom surface of the annular flange 435.

As shown in fig. 2, in the present embodiment, the inner shaft 23 of the fan blade is formed by connecting two sections of threads of the inner shaft of the upper fan blade and the inner shaft of the lower fan blade by other methods, so that the length of the inner shaft 23 of the fan blade during transportation is reduced, and transportation is facilitated.

Moreover, in the connection structure between the inner shaft of the upper fan blade and the outer shaft 33 of the fan blade and the upper fixing pipe 431 of the outer fan blade assembly, a simpler structural form can be adopted.

As shown in fig. 9, a second shoulder is arranged on the outer circumferential surface of the inner shaft of the upper blade, the fifth bearing is embedded at the upper end of the outer shaft 33 of the blade, and the upper end of the outer shaft 33 of the blade is inserted into the annular groove 436, so that the outer shaft 33 of the blade can be centered and limited; on the other hand, the inner wall of the annular groove 436 abuts against the inner ring of the fifth bearing 232 to form an axial fixing structure; thirdly, the fifth bearing 232 is shielded by the outer side wall of the annular groove 436, so that dust, impurities and the like can be prevented from entering the fifth bearing 232, and the service life of the fifth bearing 232 is prolonged.

After the upper end of the blade inner shaft 23 penetrates out of the upper fixing pipe 431 upwards, the lightning rod 50 is installed, as shown in fig. 1.

The upper end of the fan blade inner shaft 23 is provided with an external thread, the top disc 433 is axially limited through the locking nut 51 and the locking pressing plate 52, and the locking nut and the locking pressing plate apply pressure to the inner ring of the fifth bearing 232.

In the invention, the outer circumferential surface of the support shaft seat 10 is provided with a wiring terminal matched with the collecting ring device 60, and the collecting ring device 60 is connected with an output terminal of the generator 20 and used for outputting electric power. The output cable of the generator is arranged in the inner cavity of the fan blade inner shaft 23.

The invention provides a vertical shaft double-drive wind power generation device, which has the following working principle:

under the action of wind force, the inner fan blade assembly 30 rotates clockwise to drive the outer rotor (the shell 21) of the generator 20 to rotate clockwise, and meanwhile, the outer fan blade assembly 40 rotates anticlockwise to drive the inner rotor 22 of the generator 20 to rotate anticlockwise, and the inner rotor 22 and the outer rotor rotate relatively, so that the power generation efficiency is improved.

Obviously, the inner fan blade assembly 30 may rotate counterclockwise and the outer fan blade assembly 40 may rotate clockwise.

By combining the description of the specific embodiment, compared with the prior art, the vertical axis dual-drive wind power generation device provided by the invention has the following advantages:

firstly, the outer fan blade assembly 40 is arranged around the inner fan blade assembly 30, namely in the same height range, the outer fan blade assembly 40 and the inner fan blade assembly 30 share the same height space, the height of the vertical shaft power generation device is reduced, the stability is improved, the cost is reduced, and the service life is long.

And the inner fan blade component comprises a first fan blade and a second fan blade which are symmetrically arranged, the first fan blade and the second fan blade are in S-shaped spiral shapes from top to bottom, and the small wind power can be started, so that the starting performance of the generator is improved.

Thirdly, a first bearing and a second bearing are arranged between the fan blade inner shaft 23 and the support shaft seat 10, and a fifth bearing is arranged between the fan blade inner shaft 23 and the second fan blade outer shaft, so that the coaxiality of the fan blade inner shaft 23, the support shaft seat 10 and the second fan blade outer shaft is improved, and the rotation flexibility, the friction resistance and the efficiency of the generator are improved and the service life is prolonged by the arrangement of the three groups of bearings.

Fourthly, first bearing and fifth bearing all are equipped with dustproof construction, can avoid entering such as dust, debris, have prolonged the life of first bearing and fifth bearing.

And fifthly, a radial gap is formed between the inner shaft of the fan blade and the outer shaft of the fan blade, and a bearing is arranged, so that the coaxiality is improved, the friction is reduced, the loss is reduced, and the power generation efficiency is improved.

Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.

Claims

1. A vertical shaft double-drive wind power generation device comprises a generator, an inner fan blade component for driving an outer rotor of the generator to rotate and an outer fan blade component for driving an inner rotor of the generator to rotate, wherein the rotation directions of the inner fan blade component and the outer fan blade component are opposite,

2. A vertical axis dual-drive wind power generation device according to claim 1, further comprising a support shaft seat in the shape of a vertical sleeve, wherein a stepped bearing hole is formed at an upper end of a shaft hole of the support shaft seat, a first bearing is mounted in the stepped bearing hole and is axially fixed to an outer ring of the first bearing, and a shaft shoulder is formed at a matching position of the inner shaft of the fan blade and the first bearing and is axially fixed to an inner ring of the first bearing; and a second bearing is arranged at the lower end of the shaft hole of the support shaft seat, and the lower end of the inner shaft of the fan blade is inserted in the second bearing.

3. A vertical axis dual drive wind power generation device according to claim 1, wherein the inner fan assembly includes a first blade and a second blade, which are fixed to the outer shaft of the fan, respectively, the first blade and the second blade have the same structure, the windward surfaces are arc surfaces spirally arranged from top to bottom, and the windward surfaces of the first blade and the second blade are symmetrically arranged in 180-degree reverse directions.

4. A vertical axis dual drive wind power generation device according to claim 3, wherein a housing of the generator is assembled from an upper cover and a lower cover, and a flange is provided at a lower end of the outer shaft of the fan blade and fixed to an upper end surface of the upper cover through the flange; the upper end face of the upper cover is provided with a positioning ring around the central shaft hole, and the positioning ring is inserted into a gap between the inner shaft of the fan blade and the outer shaft of the fan blade.

5. A vertical axis dual drive wind power generation device according to claim 3, wherein the windward side of the first blade forms an S-shape in a horizontal projection plane and is assembled from a plurality of arc-shaped blades from top to bottom.

6. A vertical axis dual-drive wind power generation device according to claim 4, wherein the arc-shaped blades are fixed to the blade outer shaft through a fixing seat, the fixing seat is of a rectangular block structure, a first fixing through hole is horizontally formed in the center of the fixing seat, a second fixing through hole and a third fixing through hole are respectively formed in two sides of the first fixing through hole, and the second fixing through hole and the third fixing through hole are respectively parallel to the first fixing through hole and are arranged at intervals;

7. A vertical axis dual drive wind power generation unit according to claim 5, wherein the first fixing bars connecting the uppermost arc-shaped blades of the first blades and the first fixing bars connecting the lowermost arc-shaped blades of the first blades are parallel to each other and spaced apart from each other.

8. A vertical axis dual drive wind power plant according to claim 2, wherein said lower mount comprises:

9. A vertical axis dual drive wind power plant according to claim 8, wherein said upper mount comprises:

the upper fixing pipe is sleeved and fixed at the lower part of the fan blade inner shaft, the lower end of the lower fixing pipe is provided with an annular flange, the bottom surface of the annular flange is provided with an annular groove, and the upper end of the fan blade outer shaft is inserted into the annular groove;

the upper end of the second fan blade is fixed on the upper fixing plate.

10. A vertical axis dual drive wind power generation device according to claim 9, wherein a fifth bearing is provided at an upper end of the outer shaft of the fan blade, and an inner wall of the annular groove abuts against an inner ring of the fifth bearing to form an axial fixing structure.