阅读说明：本技术 一种被动式变桨距垂直轴风力机 (Passive variable-pitch vertical axis wind turbine ) 是由 朱建阳 张锦涛 田长斌 于 2021-03-12 设计创作，主要内容包括：本发明涉及风力发电领域,具体涉及一种被动式变桨距垂直轴风力机,包括支架和叶片,所述支架的顶部安装有发电机和套设于所述发电机外并固定于所述支架顶部的的变桨齿轮座,所述发电机的外表面与变桨齿轮座的内表面为间隙配合,所述发电机的转动轴穿过所述变桨齿轮座与叶片固定机构固定连接,所述叶片固定机构连接有变桨齿轮,所述变桨齿轮座的外侧设置有齿形与变桨齿轮座啮合,所述叶片通过叶片支撑架和推杆与叶片固定机构连接,所述叶片支撑架的一端固定于所述叶片固定机构,另一端与叶片转动连接；所述推杆的一端与变桨齿轮转动连接,另一端与叶片转动连接。本发明能够在叶片一个转动周期内自动实现变桨功能,提高了风能利用率。(The invention relates to the field of wind power generation, in particular to a passive variable-pitch vertical axis wind turbine which comprises a support and blades, wherein a generator and a variable-pitch gear seat which is sleeved outside the generator and fixed at the top of the support are installed at the top of the support, the outer surface of the generator is in clearance fit with the inner surface of the variable-pitch gear seat, a rotating shaft of the generator penetrates through the variable-pitch gear seat to be fixedly connected with a blade fixing mechanism, the blade fixing mechanism is connected with a variable-pitch gear, the outer side of the variable-pitch gear seat is provided with a tooth form which is meshed with the variable-pitch gear seat, the blades are connected with the blade fixing mechanism through a blade supporting frame and a push rod, one end of the blade supporting frame is fixed on the blade; one end of the push rod is rotatably connected with the variable pitch gear, and the other end of the push rod is rotatably connected with the blade. The invention can automatically realize the function of variable pitch in one rotation period of the blade, and improves the utilization rate of wind energy.)

1. A passive variable-pitch vertical axis wind turbine is characterized in that: the wind power generation device comprises a support (1) and blades (5), wherein a generator (2) and a variable pitch gear seat (3) which is sleeved outside the generator (2) and fixed to the top of the support (1) are installed at the top of the support, the outer surface of the generator (2) is in clearance fit with the inner surface of the variable pitch gear seat (3), a rotating shaft of the generator (2) penetrates through the variable pitch gear seat (3) and is fixedly connected with a blade fixing mechanism, the blade fixing mechanism is connected with a variable pitch gear (4), the outer side of the variable pitch gear seat (3) is provided with a tooth form which is meshed with the variable pitch gear seat (3), the blades (5) are connected with the blade fixing mechanism through a blade supporting frame (6) and a push rod (7), one end of the blade supporting frame (6) is fixed to the blade fixing mechanism, and the other end of the blade supporting; one end of the push rod (7) is rotatably connected with the variable pitch gear (4), and the other end of the push rod is rotatably connected with the blade (5).

2. A passive pitch-controlled vertical axis wind turbine as claimed in claim 1, wherein: the blade fixing mechanism comprises a flange coupler (8) fixedly connected with a rotating shaft of the generator (2) and a fixing disc fixed at the top of the flange coupler (8).

3. A passive pitch-controlled vertical axis wind turbine as claimed in claim 2, wherein: the fixed disc comprises an upper disc (10) and a lower disc (11) which are connected through a fixed column (9), the variable pitch gear (4) is connected with the lower disc (11) through a linkage shaft (12), one end of the linkage shaft (12) is rotatably connected with the variable pitch gear (4) or the lower disc (11), and the other end of the linkage shaft is fixedly connected with the lower disc (11) or the variable pitch gear (4); one end of the blade support frame (6) is fixed on the upper disc (10), and the other end of the blade support frame is rotatably connected with the blade (5).

4. A passive pitch-controlled vertical axis wind turbine as claimed in claim 3, wherein: the linkage shaft (12) is provided with a shaft shoulder, and the variable pitch gear (4) is provided with a stepped hole which is matched with the shaft shoulder, so that the determined height of the variable pitch gear (4) and the rotating shaft (12) is kept unchanged.

5. A passive pitch-controlled vertical axis wind turbine as claimed in claim 1, wherein: the blade (5) is provided with a support hole (15) which is in rotary connection with the blade support frame (6), and a first thrust bearing (13) is arranged between the blade support frame (6) and the support hole (15); the blade (5) is provided with a variable pitch hole (16) and is in rotary connection with the push rod (7), and a second thrust bearing (14) is installed between the push rod (7) and the variable pitch hole (16).

6. A passive pitch-controlled vertical axis wind turbine as claimed in claim 1, wherein: one end of the push rod (7) is eccentrically connected with the variable pitch gear (4).

7. A passive pitch-controlled vertical axis wind turbine as claimed in claim 1, wherein: the number of the blades (5) and the number of the variable pitch gears (4) are three, and the blades and the variable pitch gears are uniformly distributed along the circumferential direction of the variable pitch gear seat (3) respectively.

Technical Field

The invention relates to the field of wind power generation, in particular to a passive variable-pitch vertical axis wind turbine.

Background

Compared with a horizontal shaft wind turbine, the vertical shaft wind turbine has the advantages of simple structure, no need of a wind alignment device and the like, and has good development prospect. However, the existing vertical axis wind turbine has the defects of low wind energy utilization rate and poor low-speed starting characteristic, so the invention provides a passive variable-pitch vertical axis wind turbine to solve the problems.

Disclosure of Invention

The invention aims to provide a passive variable-pitch vertical axis wind turbine, which adopts a crank-rocker mechanism, has simple structure and low cost, does not need to specially design an active pitch-changing mechanism, well realizes the passive pitch-changing of an H-shaped vertical axis wind turbine in the operation process, and improves the wind energy utilization rate of the wind turbine.

In order to achieve the purpose, the invention is realized by the following technical scheme: a passive variable-pitch vertical axis wind turbine comprises a support and blades, wherein a generator and a variable-pitch gear seat which is sleeved outside the generator and fixed to the top of the support are mounted at the top of the support, the outer surface of the generator and the inner surface of the variable-pitch gear seat are in clearance fit, the rotating shaft of the generator penetrates through the variable-pitch gear seat and is fixedly connected with a blade fixing mechanism, the blade fixing mechanism is connected with a variable-pitch gear, the outer side of the variable-pitch gear seat is provided with a tooth profile which is meshed with the variable-pitch gear seat, the blades are connected with the blade fixing mechanism through a blade supporting frame and a push rod, one end of the blade supporting frame is fixed to the blade fixing mechanism, and the other; one end of the push rod is rotatably connected with the variable pitch gear, and the other end of the push rod is rotatably connected with the blade.

Preferably, the blade fixing mechanism comprises a flange coupling fixedly connected with a rotating shaft of the generator and a fixing disc fixed on the top of the flange coupling.

Preferably, the fixed disc comprises an upper disc and a lower disc which are connected through a fixed column, the variable pitch gear is connected with the lower disc through a linkage shaft, one end of the linkage shaft is rotatably connected with the variable pitch gear or the lower disc, and the other end of the linkage shaft is fixedly connected with the lower disc or the variable pitch gear; one end of the blade support frame is fixed on the upper disc, and the other end of the blade support frame is rotatably connected with the blade.

Preferably, the linkage shaft is provided with a shaft shoulder, and the variable pitch gear is provided with a stepped hole which is matched with the shaft shoulder, so that the determined height of the variable pitch gear and the rotating shaft is kept unchanged.

Preferably, the blade is provided with a support hole which is rotationally connected with the blade support frame, and a first thrust bearing is arranged between the blade support frame and the support hole; the blade is provided with a variable pitch hole and is in rotating connection with the push rod, and a second thrust bearing is installed between the push rod and the variable pitch hole.

Preferably, one end of the push rod is eccentrically connected to the pitch gear.

Preferably, the number of the blades and the number of the pitch-variable gears are three, and the blades and the pitch-variable gears are respectively and uniformly distributed along the circumferential direction of the pitch-variable gear seat.

Compared with the prior art, the invention has the positive and beneficial technical effects that: according to the invention, the variable pitch gear rotates around the variable pitch gear seat, when the variable pitch gear rotates, the push rod on the variable pitch gear can push the blade to automatically change the pitch, an additional variable pitch mechanism and an active control device are not required to be added, the structure is simple, the variable pitch function can be automatically realized in one rotation period of the blade, the attack angle of the blade is constantly in the optimal position, the utilization rate of wind energy is improved, and the maximum variable pitch angle is +/-10 degrees.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial schematic view of the present invention;

fig. 3 is a schematic view of the structure of the blade of the present invention.

In the figure: 1. a support; 2. a generator; 3. a pitch gear seat; 4. a pitch gear; 5. a blade; 6. a blade support frame; 7. a push rod; 8. a flange coupling; 9. fixing a column; 10. hanging the plate; 11. a bottom wall; 12. a universal joint shaft; 13. a first thrust bearing; 14. a second thrust bearing; 15. a support hole; 16. and (6) a variable pitch hole.

Detailed Description

The following examples are provided to further illustrate the present invention for better understanding, but the present invention is not limited to the following examples.

As shown in fig. 1-3: a passive variable-pitch vertical axis wind turbine comprises a support 1 and blades 5, wherein a generator 2 and a variable-pitch gear seat 3 which is sleeved outside the generator 2 and fixed to the top of the support 1 are installed at the top of the support 1, the outer surface of the generator 2 is in clearance fit with the inner surface of the variable-pitch gear seat 3, a rotating shaft of the generator 2 penetrates through the variable-pitch gear seat 3 and is fixedly connected with a blade 5 fixing mechanism, the blade 5 fixing mechanism is connected with a variable-pitch gear 4, the outer side of the variable-pitch gear seat 3 is provided with a tooth form which is meshed with the variable-pitch gear seat 3, the blades 5 are connected with the blade 5 fixing mechanism through a blade supporting frame 6 and a push rod 7, one end of the blade supporting frame 6 is fixed to the blade 5 fixing mechanism, and the other; one end of the push rod 7 is rotatably connected with the variable pitch gear 4, and the other end of the push rod is rotatably connected with the blade 5.

The generator 2 and the variable pitch gear seat 3 are circular, the upper surface of the support 1 is fixedly connected with the lower surface of the circular generator 2 and the lower surface of the variable pitch gear seat 3 through fixing bolts, nuts and gaskets are connected to the outer threads of the fixing bolts, the outer surface of the generator 2 is in clearance fit with the inner surface of the variable pitch gear seat 3, and the generator 2 is sleeved in a central through hole of the variable pitch gear seat 3.

In this embodiment, the blade 5 fixing mechanism includes a flange coupler 8 fixedly connected to the rotating shaft of the generator 2 and a fixing plate fixed to the top of the flange coupler 8. The rotating shaft of the generator 2 penetrates through the central through hole of the variable pitch gear seat 3 to be fixedly connected with the flange coupler 8, and the rotating shaft and the variable pitch gear seat cannot rotate relatively.

In this embodiment, the fixed disk includes an upper disk 10 and a lower disk 11 connected by a fixed column 9, the pitch gear 4 is connected with the lower disk 11 by a linkage shaft 12, one end of the blade support frame 6 is fixed on the upper disk 10, and the other end is rotatably connected with the blade 5. The upper surface of the flange coupling 8 is fixedly connected with the lower surface of the lower disc 11 through a fixing bolt, a nut is connected to the outer thread of the fixing bolt, the upper surface of the lower disc 11 is fixedly connected with the lower surface of the upper disc 10, one end of the blade support frame 6 is fixedly connected with through holes uniformly distributed on the upper circumference of the upper disc 10, an empty groove is formed in the upper disc 10 along the circumferential direction, and one end of the blade support frame 6 is clamped in the empty groove; the other end of the blade support frame 6 is rotatably connected with a support hole 15 arranged on the blade 5. The lower disc 11 is connected with the lower part of the upper disc 10 through a fixing column 9, both ends of the fixing column 9 are threads, one end of the thread penetrates through a circumferentially uniformly distributed position hole in the lower surface of the lower disc 11 to be in threaded connection with a bolt, and the other end of the thread penetrates through a circumferentially uniformly distributed position hole in the lower surface of the upper disc 10 to be in threaded connection with the bolt.

In the embodiment, the linkage shaft 12 is rotatably connected with the lower disc 11 and fixedly connected with the pitch gear 4, the linkage shaft 12 is provided with a shaft shoulder, the linkage shaft 12 is rotatably connected with a counter bore arranged on the upper circumference of the lower disc 11, the linkage shaft 12 is provided with a shaft shoulder to ensure that the linkage shaft 12 can ensure a determined position in the counter bore, and a thrust bearing is arranged between the lower surface of the shaft shoulder of the linkage shaft 12 and the counter bore of the lower disc 11 to form a rotating pair. In other embodiments, the linkage shaft 12 may be fixedly connected to the lower disc 11 and rotatably connected to the pitch gear 4, the pitch gear 4 is provided with a stepped hole to be matched with a shaft shoulder, so that the determined height of the pitch gear 4 and the linkage shaft 12 is kept unchanged, and a thrust bearing is installed between the shaft shoulder of the linkage shaft 12 and the stepped hole of the pitch gear 4 to form a revolute pair.

In the embodiment, the blade 5 is provided with a support hole 15 which is rotatably connected with the blade support frame 6, and a first thrust bearing 13 is arranged between the blade support frame 6 and the support hole 15; the blade 5 is provided with a variable pitch hole 16 which is in rotary connection with the push rod 7, and a second thrust bearing 14 is arranged between the push rod 7 and the variable pitch hole 16.

In this embodiment, one end of the push rod 7 is eccentrically connected to the pitch gear 4.

In this embodiment, the number of the blades 5 and the pitch gears 4 is three, and the blades and the pitch gears are respectively and uniformly distributed along the circumferential direction of the pitch gear seat 3.

While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.