Intelligent variable-pitch anti-typhoon vertical-axis wind turbine and operation method thereof

Abstract

The intelligent variable-pitch anti-typhoon vertical-axis wind turbine comprises an intelligent variable-pitch mechanism, an impeller, a generator body and a tower pole, the impeller comprises a blade module and a supporting frame, the generator body is installed on the top of the tower pole, and the supporting frame is connected with the input end, vertically extending upwards, of the generator body; the blade modules are installed on the supporting frame through a vertical rotating shaft and evenly distributed in the circumferential direction of the supporting frame, the supporting frame can be driven to rotate through the blade modules, the intelligent variable-pitch mechanisms are installed on the supporting frame, and one blade module is matched with one intelligent variable-pitch mechanism. Worm and gear speed reducers of the intelligent variable pitch mechanisms are connected with vertical rotating shafts of corresponding blade modules, the blade modules can be driven through the worm and gear speed reducers to achieve independent variable pitch, the self-starting capacity of the vertical-axis wind driven generator at different wind speeds is improved, the typhoon resistance is improved, and the service life of the vertical-axis wind driven generator is prolonged. And the purpose of improving the safety of the wind driven generator through active variable pitch is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to an intelligent variable-pitch typhoon-resistant vertical-axis wind turbine and an operating method thereof. Background Art

[0002] At present, there is still a blank in the domestic technology of typhoon-resistant vertical axis wind turbines. Since the blades of vertical axis generators are often fixedly connected to the support rods, it is impossible to achieve impeller braking through blade pitching technology under typhoon conditions. Due to the lack of pitching function, it is also impossible to obtain the maximum wind energy utilization rate by adjusting the blade pitch angle under normal operating wind speed. There is an urgent need for a typhoon-resistant vertical axis wind turbine with variable pitch to meet market demand. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and disadvantages of the prior art and to provide a compact and reliable intelligent variable pitch typhoon-resistant vertical axis wind turbine and its operating method, which realizes independent pitch change of the blades by controlling the worm gear reducer to drive the blade shaft, thereby meeting the purpose of improving the self-starting ability of the vertical axis wind turbine at different wind speeds, improving the typhoon resistance, adapting to the versatility of the blades under different power generation powers, and improving the safety of the wind turbine through active pitch change.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: an intelligent variable pitch typhoon-resistant vertical axis wind turbine, comprising an intelligent variable pitch mechanism, an impeller, a generator and a tower, the impeller comprising a blade module and a support frame, the generator is installed on the top of the tower, the support frame is connected to the input end of the generator extending vertically upward, the blade module is installed on the support frame through a vertical rotating shaft, and is evenly distributed along the circumference of the support frame, the support frame can be driven to rotate by the blade module, the intelligent variable pitch mechanism is installed on the support frame, and one blade module is paired with one intelligent variable pitch mechanism, the worm gear reducer of the intelligent variable pitch mechanism is connected to the vertical rotating shaft of each corresponding blade module, and the worm gear reducer can drive the blade module to achieve independent pitch.

[0005] Preferably, the intelligent variable pitch mechanism includes a worm gear reducer, a drive motor and an electromagnetically driven tooth clutch, the electromagnetically driven tooth clutch includes an upper driving tooth plate, an intermediate sliding tooth plate, a lower fixed tooth plate and an electromagnetically driven mechanical lever mechanism, wherein the top end of the vertical rotating shaft passes through the lower fixed tooth plate, the intermediate sliding tooth plate and the upper driving tooth plate in sequence upward and is connected to the output end of the worm gear reducer, the upper driving tooth plate is fixed at the output end of the worm gear reducer, the input end of the worm gear reducer is connected to the drive motor, the lower fixed tooth plate and the electromagnetically driven mechanical lever mechanism are fixed on a support frame, the lever of the electromagnetically driven mechanical lever mechanism is connected to the intermediate sliding tooth plate, and the electromagnetically driven mechanical lever mechanism can drive the intermediate sliding tooth plate to slide up and down on the vertical rotating shaft to achieve bite locking with the upper driving tooth plate or the lower fixed tooth plate.

[0006] Preferably, the blade module includes at least one blade assembly, and each blade assembly consists of a vertical rotating shaft and a blade fixed on the vertical rotating shaft.

[0007] Preferably, the two blade components in each blade module are butted against each other via respective vertical rotating shafts and are connected in series to form a whole.

[0008] Preferably, the blades are made of glass fiber, carbon fiber or aluminum alloy.

[0009] Preferably, the support frame is a three-arm structure, that is, one arm is equipped with a blade module, and the angle between two arms is 120°.

[0010] Preferably, a bearing is installed between the vertical rotating shaft and the support frame.

[0011] Preferably, the driving motor is a stepping motor or a servo motor.

[0012] The present invention provides an operating method of the above-mentioned intelligent variable pitch typhoon resistant vertical axis wind turbine, including the following two situations: The first type: when the wind speed reaches the cut-in wind speed, the intelligent pitch mechanism drives all blades to the pitch angle, and the blades drive the support frame to drag the generator to generate electricity normally; The second type: when the wind speed reaches the cut-out wind speed, the intelligent variable pitch mechanism drives all the blades to a parallel state with each other, that is, the feathering braking position. At this time, the wind force cannot drive the blades to drive the support frame to rotate, and the generator is in a state of stopping power generation.

[0013] The present invention provides another method for operating the above-mentioned intelligent variable pitch typhoon resistant vertical axis wind turbine, including the following working conditions 1 and 2: Working condition 1: In normal operation, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism drives the middle sliding toothed disc to slide upward, firstly engages with the upper driving toothed disc, and then controls the worm gear reducer to drive the upper driving toothed disc to drive all blades to the pitch working position, and then drives the middle sliding toothed disc to slide downward through the electromagnetically driven mechanical lever mechanism, and engages with the lower fixed toothed disc to achieve blade position locking; Working condition 2: In the typhoon-resistant working condition, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism drives the middle sliding sprocket to slide up, first meshing with the upper driving sprocket, and then controlling the worm gear reducer to drive the upper driving sprocket to drive all blades to the feathering braking position, and then the electromagnetically driven mechanical lever mechanism drives the middle sliding sprocket to slide down, meshing with the lower fixed sprocket to achieve blade position locking.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The blades are independently variable pitched through a worm gear reducer to achieve maximum wind energy absorption rate and overall machine safety under typhoon conditions.

[0015] 2. The blades are locked purely mechanically through an electromagnetically driven tooth clutch, extending the life of the worm gear reducer.

[0016] 3. Electromagnetic driven tooth clutch realizes drive engagement and blade locking.

[0017] 4. The blades are connected and lengthened through the vertical shaft to increase the windward area of ​​the impeller.

[0018] 5. The blades can be combined according to the power required by the customer (i.e. used in series), which improves the universality of blade molds and reduces mold costs.

[0019] 6. The blade pitch angle can be intelligently optimized according to the power change at a certain wind speed to obtain the optimal pitch angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of an intelligent variable pitch typhoon-resistant vertical axis wind turbine.

[0021] Figure 2 This is one of the structural schematic diagrams of the intelligent pitch mechanism.

[0022] Figure 3 This is the second structural diagram of the intelligent pitch mechanism (the middle sliding sprocket is engaged with the upper driving sprocket).

[0023] Figure 4 This is the third structural diagram of the intelligent pitch mechanism (the middle sliding sprocket is engaged with the lower fixed sprocket).

[0024] Figure 5 Schematic diagram of the blade in the variable pitch working position.

[0025] Figure 6 Schematic diagram of the blades in the feathering braking position. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0027] like Figure 1 and Figure 2 As shown, this embodiment discloses an intelligent variable pitch typhoon-resistant vertical axis wind turbine, including an intelligent variable pitch mechanism 1, an impeller 2, a generator 3 and a tower 4, the impeller 2 includes a blade module and a support frame 203, the generator 3 is installed at the top of the tower 4, the support frame 203 is connected to the input end of the generator 3 extending vertically upward, the blade module is installed on the support frame 203 through a vertical rotating shaft 202, and is evenly distributed along the circumference of the support frame 203, and the support frame 203 can be driven to rotate by the blade module, the intelligent variable pitch mechanism 1 is installed on the support frame 203, and one blade module is paired with one intelligent variable pitch mechanism 1, the worm gear reducer 101 of the intelligent variable pitch mechanism 1 is connected to the vertical rotating shaft 202 of each corresponding blade module, and the worm gear reducer 101 can drive the blade module to achieve independent pitch change, so as to obtain the maximum wind energy absorption rate and the safety of the whole machine under typhoon conditions.

[0028] Specifically, the intelligent variable pitch mechanism 1 includes a worm gear reducer 101, a drive motor 102 and an electromagnetic driven tooth clutch, the electromagnetic driven tooth clutch includes an upper driving tooth plate 103, an intermediate sliding tooth plate 104, a lower fixed tooth plate 105 and an electromagnetic driven mechanical lever mechanism 106, wherein the top end of the vertical shaft 202 passes through the lower fixed tooth plate 105, the intermediate sliding tooth plate 104 and the upper driving tooth plate 103 in sequence and then is connected to the output end of the worm gear reducer 101, the vertical shaft 202 and the support frame 203 are assembled with a bearing, and the upper driving tooth plate 103 is provided with a bearing assembly. The movable toothed disc 103 is fixed to the output end of the worm gear reducer 101, and the input end of the worm gear reducer 101 is connected to the driving motor 102. The lower fixed toothed disc 105 and the electromagnetic driven mechanical lever mechanism 106 are fixed to the support frame 203. The lever 106-1 of the electromagnetic driven mechanical lever mechanism 106 is connected to the middle sliding toothed disc 104. The electromagnetic driven mechanical lever mechanism 106 can drive the middle sliding toothed disc 104 to slide up and down on the vertical shaft 202 to achieve engagement and locking with the upper driving toothed disc 103 or the lower fixed toothed disc 105. Figure 3 and Figure 4 shown.

[0029] Specifically, the blade module includes at least one blade assembly, each blade assembly is composed of a vertical rotating shaft 202 and a blade 201 fixed on the vertical rotating shaft 202; when the blade module includes more than two blade assemblies, the two blade assemblies are connected and lengthened through their respective vertical rotating shafts 202 and connected in series as a whole, so as to increase the windward area of ​​the impeller and thereby increase the power generation. In this embodiment, each blade module includes two blade assemblies.

[0030] Specifically, the blade 201 is made of glass fiber, carbon fiber or aluminum alloy.

[0031] Specifically, the support frame 203 is a three-arm structure, that is, one arm 203-1 is equipped with a blade module, and the angle between two arms 203-1 is 120°. Figure 5 and Figure 6 shown.

[0032] Specifically, the driving motor 102 is a stepping motor or a servo motor.

[0033] The following is the operation of the intelligent variable pitch typhoon resistant vertical axis wind turbine in this embodiment, which is as follows: When the wind speed reaches the cut-in wind speed, the intelligent pitch mechanism 1 drives all blades 201 to a pitch angle such as Figure 5 As shown, the blades 201 drive the support frame 203 to drag the generator 3 to generate electricity normally.

[0034] When the wind speed reaches the cut-out wind speed, the intelligent pitch mechanism 1 drives all blades 201 to a state parallel to each other, that is, the feathering braking position, such as Figure 6 As shown, at this time, the wind force cannot drive the blades 201 to drive the support frame 203 to rotate, and the generator 3 is in a state of stopping power generation.

[0035] Working condition 1: In normal operation, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism 106 drives the middle sliding tooth plate 104 to slide upward, and first engages with the upper driving tooth plate 103, such as Figure 3 As shown, the worm gear reducer 101 is then controlled to drive the upper drive toothed disc 103 to drive all blades 201 to the pitch working position, as shown in FIG. Figure 5 As shown, the electromagnetically driven mechanical lever mechanism 106 then drives the middle sliding toothed disc 104 to slide down and engage with the lower fixed toothed disc 105 to lock the blade position, as shown in FIG. Figure 4 shown.

[0036] Working condition 2: In the typhoon-resistant working condition, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism 106 drives the middle sliding tooth plate 104 to slide upward, and first engages with the upper driving tooth plate 103, such as Figure 3 As shown, the worm gear reducer 101 is then controlled to drive the upper drive sprocket 103 to drive all blades 201 to the feathering braking position, as shown in FIG. Figure 6 As shown, the electromagnetically driven mechanical lever mechanism 106 then drives the middle sliding toothed disc 104 to slide down and engage with the lower fixed toothed disc 105 to lock the blade position, as shown in FIG. Figure 4 shown.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An intelligent variable pitch typhoon resistant vertical axis wind turbine, characterized in that: The invention comprises an intelligent variable pitch mechanism (1), an impeller (2), a generator (3) and a tower (4); the impeller (2) comprises a blade module and a support frame (203); the generator (3) is mounted on the top of the tower (4); the support frame (203) is connected to an input end of the generator (3) extending vertically upward; the blade modules are mounted on the support frame (203) via a vertical rotating shaft (202) and are evenly distributed along the circumference of the support frame (203); the support frame (203) can be driven to rotate by the blade modules; the intelligent variable pitch mechanism (1) is mounted on the support frame (203); one blade module is paired with one intelligent variable pitch mechanism (1); the worm gear reducer (101) of the intelligent variable pitch mechanism (1) is connected to the vertical rotating shaft (202) of each corresponding blade module; the worm gear reducer (101) can drive the blade modules to achieve independent variable pitch.

2. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 1, characterized in that: The intelligent variable pitch mechanism (1) comprises a worm gear reducer (101), a drive motor (102) and an electromagnetic driven tooth clutch, wherein the electromagnetic driven tooth clutch comprises an upper driving tooth plate (103), an intermediate sliding tooth plate (104), a lower fixed tooth plate (105) and an electromagnetic driven mechanical lever mechanism (106), wherein the top end of the vertical rotating shaft (202) passes through the lower fixed tooth plate (105), the intermediate sliding tooth plate (104) and the upper driving tooth plate (103) in sequence upwards and is connected to the output end of the worm gear reducer (101), and the upper driving tooth plate (103) is fixed on the worm gear reducer. The output end of the worm gear reducer (101) is connected to the driving motor (102), the lower fixed toothed disc (105) and the electromagnetic driven mechanical lever mechanism (106) are fixed on the support frame (203), the lever (106-1) of the electromagnetic driven mechanical lever mechanism (106) is connected to the middle sliding toothed disc (104), and the electromagnetic driven mechanical lever mechanism (106) can drive the middle sliding toothed disc (104) to slide up and down on the vertical rotating shaft (202) to achieve engagement and locking with the upper driving toothed disc (103) or the lower fixed toothed disc (105).

3. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 2, characterized in that: The blade module comprises at least one blade component, and each blade component is composed of a vertical rotating shaft (202) and a blade (201) fixed on the vertical rotating shaft (202).

4. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 3, characterized in that: The two blade components in each blade module are butted against each other via respective vertical rotating shafts (202) and are connected in series to form a whole.

5. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 3, characterized in that: The blades (201) are made of glass fiber, carbon fiber or aluminum alloy.

6. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 1, characterized in that: The support frame (203) is a three-arm structure, that is, one arm is installed with a blade module, and the angle between two arms is 120°.

7. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 1, characterized in that: A bearing is assembled between the vertical rotating shaft (202) and the support frame (203).

8. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 2, characterized in that: The driving motor (102) is a stepping motor or a servo motor.

9. The method for operating the intelligent variable pitch typhoon resistant vertical axis wind turbine according to any one of claims 1 to 8, characterized in that: This includes the following two situations: The first type: when the wind speed reaches the cut-in wind speed, the intelligent pitch mechanism (1) drives all blades (201) to a pitch angle, and the blades (201) drive the support frame (203) to drag the generator (3) to generate electricity normally; The second type: when the wind speed reaches the cut-out wind speed, the intelligent variable pitch mechanism (1) drives all blades (201) to a state parallel to each other, i.e., a feathering braking position. At this time, the wind force cannot drive the blades (201) to drive the support frame (203) to rotate, and the generator (3) is in a state of stopping power generation.

10. The method for operating the intelligent variable pitch typhoon resistant vertical axis wind turbine according to any one of claims 1 to 8, characterized in that: Including the following working conditions 1 and 2: Working condition 1: In normal operation, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism (106) drives the middle sliding toothed disc (104) to slide upward, first engaging with the upper driving toothed disc (103), and then controlling the worm gear reducer (101) to drive the upper driving toothed disc (103) to drive all blades (201) to the variable pitch working position, and then the electromagnetically driven mechanical lever mechanism (106) drives the middle sliding toothed disc (104) to slide downward, engaging with the lower fixed toothed disc (105) to achieve blade position locking; Working condition 2: In the typhoon-resistant working condition, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism (106) drives the middle sliding toothed disc (104) to slide upward, first meshing with the upper driving toothed disc (103), and then controlling the worm gear reducer (101) to drive the upper driving toothed disc (103) to drive all blades (201) to the feathering braking position, and then the electromagnetically driven mechanical lever mechanism (106) drives the middle sliding toothed disc (104) to slide downward, and meshing with the lower fixed toothed disc (105) to achieve blade position locking.

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