CN110185578B - Cross support device for large vertical axis wind turbine - Google Patents
Cross support device for large vertical axis wind turbine Download PDFInfo
- Publication number
- CN110185578B CN110185578B CN201910499478.6A CN201910499478A CN110185578B CN 110185578 B CN110185578 B CN 110185578B CN 201910499478 A CN201910499478 A CN 201910499478A CN 110185578 B CN110185578 B CN 110185578B
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- China
- Prior art keywords
- cross brace
- movable
- vertical axis
- transverse support
- connecting rod
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- 230000005540 biological transmission Effects 0.000 claims description 35
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Abstract
A transverse support device for a large vertical axis wind turbine belongs to the field of wind power generation. The transverse support device comprises a fixed transverse support, a movable transverse support, a connecting shaft and a driving mechanism, wherein the fixed transverse support is connected with the movable transverse support through the connecting shaft. The transverse supporting device has the functions of connecting the blades, improving the self-lifting performance and reducing the rotating speed. The movable cross brace is arranged on the cross brace structure, the air resistance is changed by changing the windward area of the cross brace, so that the starting moment of the vertical axis fan in a low wind speed static state is improved, and meanwhile, the rotating speed under a high wind speed condition is reduced, and further, the functions of improving the self-starting performance and adjusting the rotating speed of the wind turbine are realized. The transverse support device can solve the problems of poor aerodynamic performance and rotating speed control inherent to the vertical axis fan, and can reduce the influence of additional equipment on the overall structure and aerodynamic performance of the vertical axis fan to the greatest extent.
Description
Technical Field
The invention relates to a transverse support device for a large vertical axis wind turbine, and belongs to the field of wind power generation.
Technical Field
Wind energy is widely regarded by various countries as a renewable energy source which has no pollution and wide distribution and is not limited by time. The development and utilization of wind energy resources mainly convert wind energy into electric energy through wind turbines, and currently mainly used wind turbines comprise a horizontal axis fan and a vertical axis fan, wherein the development history of the horizontal axis fan is long, and the technology is mature. Compared with the traditional horizontal axis fan, the vertical axis fan can capture wind energy from all directions, and a yaw wind-facing device is not needed. Meanwhile, the power generation system of the vertical axis fan can be arranged on the ground, so that maintenance is convenient. In addition, the blade tip speed of the vertical axis fan is smaller, so that the pneumatic noise in the fan operation process can be effectively reduced, and the vertical axis fan is considered to be more suitable for being used in urban environments.
For wind turbine design, it is generally necessary to consider the starting performance of the wind turbine at low wind speeds, i.e. the self-starting performance, and the performance at high wind speeds. The lift type vertical axis fans are generally poor in self-starting performance, and require external motor assistance to achieve self-starting, or resistance type fans to assist starting. Both of these methods tend to result in a complex vertical axis fan structure and also increase costs. When the wind speed exceeds the rated wind speed, the wind turbine needs to control the rotating speed by various means, so that damage of the flying car of the wind wheel to the blade structure and the power generation system is avoided. Aiming at the problems of poor self-starting performance of the vertical axis fan under the low wind speed and rotating speed control under the high wind speed condition, the invention provides a transverse support design form which is used for improving the self-starting performance of the vertical axis fan and controlling the rotating speed of the vertical axis fan.
Disclosure of Invention
Aiming at the problems of poor self-starting performance of a vertical axis fan at low wind speed and rotating speed control at high wind speed, the invention provides a transverse support device for a large vertical axis fan.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a stull device for large-scale vertical axis wind turbine, wind turbine blade is connected with the pivot through streamlined fixed stull, be equipped with streamlined movable stull, connecting axle and actuating mechanism on the fixed stull, the fixed stull passes through the connecting axle and connects movable stull; one end of the transmission connecting rod is connected with the movable cross brace through a first hinge, the other end of the transmission connecting rod is connected with the driving mechanism through a second hinge, and the driving mechanism enables the movable cross brace to be unfolded or closed around the connecting shaft through the transmission connecting rod.
The driving mechanism comprises a servo motor, a screw and a screw nut matched with the screw, one end of the transmission connecting rod is connected with the movable cross brace through a first hinge, the other end of the transmission connecting rod is connected with the screw nut through a second hinge, the servo motor drives the screw to rotate, and the screw nut moving on the screw rod enables the movable cross brace to be unfolded or closed around the connecting shaft through the transmission connecting rod.
The driving mechanism adopts a hydraulic mechanism or a pneumatic mechanism, one end of the transmission connecting rod is connected with the movable cross brace through a first hinge, the other end of the transmission connecting rod is connected with a driving piece of the hydraulic mechanism or the pneumatic mechanism through a second hinge, and the driving piece of the hydraulic mechanism or the pneumatic mechanism enables the movable cross brace to be unfolded or closed around the connecting shaft through the transmission connecting rod.
At least one movable cross brace is arranged on one side of the fixed cross brace, which is located behind the fixed cross brace.
At least one pair of movable cross braces are arranged on two sides of the fixed cross brace after the fixed cross braces are deviated, and each pair of movable cross braces is hinged with the driving mechanism through a respective transmission connecting rod.
The tail end on the fixed cross brace is provided with at least one movable cross brace.
The beneficial effects of the invention are as follows: the transverse support device for the large vertical axis wind turbine comprises a fixed transverse support, a movable transverse support, a connecting shaft and a driving mechanism for driving the movable transverse support to rotate, wherein the fixed transverse support is connected with the movable transverse support through the connecting shaft. The horizontal support device has the functions of connecting blades, improving self-starting performance and reducing rotating speed, the movable horizontal support is arranged on the horizontal support structure, the air resistance is changed by changing the windward area of the horizontal support, the starting moment of the vertical axis fan in a static state is further improved, the rotating speed under the condition of high wind speed is reduced, the self-starting performance is improved, the rotating speed of the wind turbine is adjusted, and the influence of additional equipment on the overall structure and the pneumatic performance of the vertical axis fan can be reduced to the greatest extent. The transverse support device is used for connecting the wind turbine blade with the fan rotating shaft by arranging the fixed transverse support, and the windward resistance of the transverse support under the windward condition is changed by changing the windward area of the movable transverse support, so that the starting performance of the vertical axis fan is improved, and the device can be used for controlling the rotating speed of the fan under the condition of extreme wind speed.
Drawings
FIG. 1 is an installation view of a cross brace apparatus for a large vertical axis wind turbine.
FIG. 2 is a block diagram of a cross brace apparatus for a large vertical axis wind turbine having a movable cross brace.
FIG. 3 is a block diagram of a cross brace apparatus for a large vertical axis wind turbine having two movable cross braces.
FIG. 4 is a block diagram of a cross brace apparatus for a large vertical axis wind turbine with a movable cross brace mounted on the tail.
FIG. 5 is a perspective view of a cross brace apparatus for a large vertical axis wind turbine.
In the figure: 1. the wind turbine blade comprises a fixed cross brace, 2, a movable cross brace, 3, a connecting shaft, 4, a servo motor, 5, a screw rod, 6, a nut, 7, a transmission connecting rod, 7a, a first hinge, 7b, a second hinge, 8, a wind turbine blade, 9 and a rotating shaft.
Detailed Description
Fig. 1 and 5 show structural diagrams of a cross brace apparatus for a large vertical axis wind turbine. The transverse support device for the large vertical axis wind turbine is characterized in that the wind turbine blade 8 is connected with the rotating shaft 9 through the streamline fixed transverse support 1. The fixed cross brace 1 is provided with a streamline movable cross brace 2, a connecting shaft 3 and a driving mechanism, and the fixed cross brace 1 is connected with the movable cross brace 2 through the connecting shaft 3. The driving mechanism comprises a servo motor 4, a screw rod 5 and a screw nut 6 matched with the screw rod 5, one end of a transmission connecting rod 7 is connected with the movable cross brace 2 through a first hinge 7a, the other end of the transmission connecting rod is connected with the screw nut 6 through a second hinge 7b, the servo motor 4 drives the screw rod 5 to rotate, and the screw nut 6 moving on the screw rod 5 enables the movable cross brace 2 to be unfolded or closed around the connecting shaft 3 through the transmission connecting rod 7.
The driving mechanism can also adopt a hydraulic mechanism or a pneumatic mechanism, one end of the transmission connecting rod 7 is connected with the movable cross brace 2 through a first hinge 7a, the other end of the transmission connecting rod is connected with a driving piece of the hydraulic mechanism or the pneumatic mechanism through a second hinge 7b, and the driving piece of the hydraulic mechanism or the pneumatic mechanism enables the movable cross brace 2 to be unfolded or closed around the connecting shaft 3 through the transmission connecting rod 7.
Figure 2 shows a structural view of a cross-brace apparatus having a movable cross-brace. A movable cross brace 2 is arranged on one side of the fixed cross brace 1, which is arranged behind the fixed cross brace. The fixed cross brace 1 is connected with the movable cross brace 2 through a connecting shaft 3. One end of a transmission connecting rod 7 is connected with the movable cross brace 2 through a first hinge 7a, the other end of the transmission connecting rod is connected with a screw nut 6 through a second hinge 7b, the servo motor 4 drives the screw rod 5 to rotate, and the screw nut 6 moving on the screw rod 5 enables the movable cross brace 2 to be unfolded or closed around the connecting shaft 3 through the transmission connecting rod 7.
Figure 3 shows a construction of a cross-brace apparatus with two movable cross-braces. A pair of movable cross braces 2 are arranged on the two sides of the fixed cross brace 1. The fixed cross brace 1 is respectively connected with a movable cross brace 2 through two connecting shafts 3. One end of each of the two transmission connecting rods 7 is connected with the movable cross brace 2 through two first hinges 7a, the other end of each of the two transmission connecting rods is connected with the same screw nut 6 through two second hinges 7b, the servo motor 4 drives the screw rod 5 to rotate, and the screw nut 6 moving on the screw rod 5 enables the two movable cross braces 2 to be unfolded or closed around the respective connecting shafts 3 through the two transmission connecting rods 7.
Figure 4 shows a block diagram of the movable cross-brace mounted on the tail of the cross-brace apparatus. The tail end of the fixed transverse support 1 is provided with a movable transverse support 2. The fixed cross brace 1 is connected with the movable cross brace 2 through a connecting shaft 3. The drive mechanism is similar to that shown in fig. 2.
The fixed cross brace 1 of the cross brace device is used for connecting a wind turbine blade and a wind turbine rotating shaft, mainly bears the gravity of the blade and the centrifugal force generated in the rotating process, and belongs to a strong member. The movable cross brace 2 is connected with the fixed cross brace 1 through a connecting shaft 3, and the movable cross brace 2 can rotate in a certain range under the action of a driving mechanism. The number of movable wales 2 on one fixed wale 1 is not exclusive and may be one, two or other numbers. The movable cross brace 2 may have the same length as the fixed cross brace 1 or may have a smaller length than a part of the fixed cross brace 1. On the same fixed cross brace apparatus, the lengths of different movable cross braces 2 may be different.
The fixed cross brace 1 connects the wind turbine blade with the rotating shaft by welding or bolting. The cross section of the fixed cross brace 1 can be aerofoil streamline, circular, common rectangle or other shapes in order to reduce the air resistance of the cross brace part and improve the aerodynamic performance of the fan. The connecting shaft 3 is used for connecting the movable cross brace 2 with the fixed cross brace 1, and the connecting shaft 3 is used as a rotating shaft when the movable cross brace 2 rotates.
The servo motor 4, the screw 5 and the nut 6 are arranged inside the fixed cross-brace 1. The servo motor 4 is connected with the screw rod 5 and can drive the screw rod 5 to rotate, the screw nut 6 is connected with the screw rod 5 through threads, and the transmission connecting rod 7 is hinged with the screw nut 6 and the movable cross brace 2. The servo motor 4 converts the rotary motion of the servo motor 4 into the linear motion of the screw nut 6 by driving the screw rod 5 to rotate. The transmission connecting rod 7 is driven to move through the linear motion of the nut 6, and then the movable cross brace 2 is driven to rotate around the connecting shaft 3. The power supply for supplying power to the servo motor 4 can be arranged inside the fixed cross brace 1 and can be arranged in the fan rotating shaft or on the ground.
When the actual wind speed is lower than the cut-in wind speed of the fan, the fan is in a static state, and the movable cross brace 2 rotates around the connecting shaft 3 for a certain angle under the action of the driving mechanism, so that the windward area of the cross brace is increased. The increase of the windward area of the cross brace causes the increase of the air resistance, and the increased air resistance can be used as the starting moment when the fan is started, so that the starting performance of the vertical axis fan under low wind speed is improved. After the blower is started, the movable cross brace 2 is restored to the horizontal state again to reduce air resistance.
At high wind speeds, the fan speed is higher than the rated speed, and the driving mechanism drives the movable cross brace 2 to rotate around the connecting shaft 3. According to the actual wind speed and the actual rotation speed of the fan, the movable cross brace 2 can keep different angles, so that different air resistances are generated to reduce the rotation speed of the fan under the condition of high wind speed. When the rotation speed of the fan is reduced to or below the rated rotation speed, the movable cross brace 2 is restored to the horizontal state again so as to reduce the air resistance when the fan normally operates.
In an actual vertical axis fan, all the cross braces can adopt the design scheme, and the design scheme can also be adopted on only part of the cross braces.
Claims (4)
1. The transverse support device for the large vertical axis wind turbine is characterized in that the fixed transverse support (1) is provided with a streamline movable transverse support (2), a connecting shaft (3) and a driving mechanism, and the fixed transverse support (1) is connected with the movable transverse support (2) through the connecting shaft (3); one end of the transmission connecting rod (7) is connected with the movable cross brace (2) through a first hinge (7 a), the other end of the transmission connecting rod is connected with the driving mechanism through a second hinge (7 b), and the driving mechanism enables the movable cross brace (2) to be unfolded or closed around the connecting shaft (3) through the transmission connecting rod (7);
the driving mechanism comprises a servo motor (4), a screw rod (5) and a screw nut (6) matched with the screw rod (5), one end of a transmission connecting rod (7) is connected with the movable cross brace (2) through a first hinge (7 a), the other end of the transmission connecting rod is connected with the screw nut (6) through a second hinge (7 b), the servo motor (4) drives the screw rod (5) to rotate, and the screw nut (6) moving on the screw rod (5) enables the movable cross brace (2) to be unfolded or closed around the connecting shaft (3) through the transmission connecting rod (7);
the driving mechanism adopts a hydraulic mechanism or a pneumatic mechanism, one end of the transmission connecting rod (7) is connected with the movable cross brace (2) through a first hinge (7 a), the other end of the transmission connecting rod is connected with a driving piece of the hydraulic mechanism or the pneumatic mechanism through a second hinge (7 b), and the driving piece of the hydraulic mechanism or the pneumatic mechanism enables the movable cross brace (2) to be unfolded or closed around the connecting shaft (3) through the transmission connecting rod (7).
2. The stull device for large vertical axis wind turbine according to claim 1, characterized in that the stationary stull (1) is provided with at least one movable stull (2) on the rear side.
3. The stull device for large vertical axis wind turbine according to claim 1, characterized in that the fixed stull (1) is provided with at least one pair of movable stulls (2) on both sides of the back, each pair of movable stulls (2) being hinged to the driving mechanism by means of a respective transmission link (7).
4. The stull device for large vertical axis wind turbines according to claim 1, characterized in that the tail end on the fixed stull (1) is provided with at least one movable stull (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499478.6A CN110185578B (en) | 2019-06-11 | 2019-06-11 | Cross support device for large vertical axis wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499478.6A CN110185578B (en) | 2019-06-11 | 2019-06-11 | Cross support device for large vertical axis wind turbine |
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| Publication Number | Publication Date |
|---|---|
| CN110185578A CN110185578A (en) | 2019-08-30 |
| CN110185578B true CN110185578B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910499478.6A Active CN110185578B (en) | 2019-06-11 | 2019-06-11 | Cross support device for large vertical axis wind turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN110185578B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110088828A (en) * | 2010-01-29 | 2011-08-04 | (주)엔티시 | Vertical axis wind turbine |
| WO2013119041A1 (en) * | 2012-02-07 | 2013-08-15 | Jang Tak Gyun | Wind power device |
| JP5469267B1 (en) * | 2013-03-21 | 2014-04-16 | 純二 嶋田 | Vertical axis windmill |
| CN210371018U (en) * | 2019-06-11 | 2020-04-21 | 大连理工大学 | Cross brace device for large vertical axis wind turbine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005095793A1 (en) * | 2004-03-31 | 2005-10-13 | Intellectual Property Bank Corp. | Vertical shaft type windmill and blade for windmill |
-
2019
- 2019-06-11 CN CN201910499478.6A patent/CN110185578B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110088828A (en) * | 2010-01-29 | 2011-08-04 | (주)엔티시 | Vertical axis wind turbine |
| WO2013119041A1 (en) * | 2012-02-07 | 2013-08-15 | Jang Tak Gyun | Wind power device |
| JP5469267B1 (en) * | 2013-03-21 | 2014-04-16 | 純二 嶋田 | Vertical axis windmill |
| CN210371018U (en) * | 2019-06-11 | 2020-04-21 | 大连理工大学 | Cross brace device for large vertical axis wind turbine |
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| Publication number | Publication date |
|---|---|
| CN110185578A (en) | 2019-08-30 |
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