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

Abstract

The application discloses an intelligent variable-pitch anti-typhoon vertical shaft wind driven generator and a working method thereof, which comprises an intelligent variable-pitch mechanism, a blade wheel, a generator and a tower pole. The blade wheel comprises a blade module and a support frame. The generator is installed at the top of the tower pole. The support frame is connected with an input end of the generator which extends vertically upward. The blade module is installed on the support frame through a vertical rotating shaft and is uniformly distributed along the circumference of the support frame. The blade module can drive the support frame to rotate. The intelligent variable-pitch mechanism is installed on the support frame, and one blade module is matched with one intelligent variable-pitch mechanism. The worm gear reducer of the intelligent variable-pitch mechanism is connected with the vertical rotating shaft of the corresponding blade module. The worm gear reducer can drive the blade module to realize independent variable-pitch. The vertical shaft wind driven generator can improve the self-starting ability under different wind speeds, improve the anti-typhoon ability, adapt to the blade versatility under different power generation powers and improve the safety of the wind driven generator through active variable-pitch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to an intelligent variable-pitch anti-typhoon vertical axis wind turbine and a working method thereof. BACKGROUND

[0002] At present, the anti-typhoon vertical axis wind turbine technology is still blank in China. Since the blades of the vertical axis wind turbine are usually fixedly connected with the support rod, the blade pitch technology cannot be used to realize the brake of the impeller under the typhoon working condition. Without the variable-pitch function, the blade pitch angle cannot be adjusted to obtain the maximum wind energy utilization rate under the normal running wind speed. Therefore, there is an urgent need for a variable-pitch anti-typhoon vertical axis wind turbine to meet the market demand. SUMMARY

[0003] The present application aims to overcome the deficiencies and shortcomings of the prior art, and provides an intelligent variable-pitch anti-typhoon vertical axis wind turbine with compact and reliable structure and a working method thereof. The independent variable-pitch of the blades is realized by controlling the worm gear reducer to drive the blade rotating shaft, so as to improve the self-starting ability of the vertical axis wind turbine under different wind speeds, improve the anti-typhoon ability, adapt to the generality of the blades under different power generation powers, and improve the safety of the wind turbine through active variable-pitch.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present application is as follows: an intelligent variable-pitch anti-typhoon vertical axis wind turbine, comprising an intelligent variable-pitch mechanism, an impeller, a generator and a tower pole. The impeller comprises a blade module and a support frame. The generator is installed at the top of the tower pole. The support frame is connected with the input end of the generator which extends vertically upward. The blade module is installed on the support frame through a vertical rotating shaft and is uniformly distributed along the circumferential direction of the support frame. The blade module can drive the support frame to rotate. The intelligent variable-pitch mechanism is installed on the support frame, and one blade module is matched with one intelligent variable-pitch mechanism. The worm gear reducer of the intelligent variable-pitch mechanism is connected with the vertical rotating shaft of the corresponding blade module. The worm gear reducer can drive the blade module to realize independent variable-pitch.

[0005] Preferably, the intelligent variable pitch mechanism comprises a worm gear reducer, a driving motor and an electromagnetic driving cog clutch, the electromagnetic driving cog clutch comprises an upper driving cog disc, a middle sliding cog disc, a lower fixed cog disc and an electromagnetic driving mechanical lever mechanism, wherein the top end of the vertical rotating shaft is sequentially connected with the output end of the worm gear reducer after passing through the lower fixed cog disc, the middle sliding cog disc and the upper driving cog disc upwards, the upper driving cog disc is fixed on the output end of the worm gear reducer, the input end of the worm gear reducer is connected with the driving motor, the lower fixed cog disc and the electromagnetic driving mechanical lever mechanism are fixed on the support frame, the lever of the electromagnetic driving mechanical lever mechanism is connected with the middle sliding cog disc, and the electromagnetic driving mechanical lever mechanism can drive the middle sliding cog disc to slide upwards and downwards on the vertical rotating shaft to realize the occlusion locking with the upper driving cog disc or the lower fixed cog disc.

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

[0007] Preferably, the blade assemblies in each blade module are connected through the respective vertical rotating shafts and are connected in series as a whole.

[0008] Preferably, the blade is made of glass fiber, carbon fiber or aluminum alloy.

[0009] Preferably, the support frame is a three-branch structure, that is, one branch is provided with one blade module, and the included angle between two branches is 120°.

[0010] Preferably, the vertical rotating shaft and the support frame are assembled through bearings.

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

[0012] The application provides an operation method of the intelligent variable pitch anti-tornado vertical shaft wind turbine.

[0013] The first kind is that when the wind speed reaches the cut-in wind speed, the intelligent variable pitch mechanism drives all the blades to the variable pitch angle, the blades drive the support frame to drag the generator to generate electricity normally.

[0014] The second kind is that when the wind speed reaches the cut-out wind speed, the intelligent variable pitch mechanism drives all the blades to the parallel state, 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 the state of stopping generating electricity.

[0015] The application provides another operation method of the intelligent variable pitch anti-tornado vertical shaft wind turbine.

[0016] Working condition one: in normal operation condition, the electromagnetic drive cogwheel clutch works, the intermediate sliding cogwheel is driven to slide up by the electromagnetic drive mechanical lever mechanism, first engages with the upper driving cogwheel, then controls the worm gear reducer to drive the upper driving cogwheel to drive all blades to the variable pitch working position, and then the intermediate sliding cogwheel is driven to slide down by the electromagnetic drive mechanical lever mechanism, engages with the lower fixed cogwheel to realize blade position locking.

[0017] Working condition two: in the anti typhoon condition, the electromagnetic drive cogwheel clutch works, the intermediate sliding cogwheel is driven to slide up by the electromagnetic drive mechanical lever mechanism, first engages with the upper driving cogwheel, then controls the worm gear reducer to drive the upper driving cogwheel to drive all blades to the pitch braking position, and then the intermediate sliding cogwheel is driven to slide down by the electromagnetic drive mechanical lever mechanism, engages with the lower fixed cogwheel to realize blade position locking.

[0018] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0019] 1. The blades realize independent variable pitch through the worm gear reducer, so that the maximum wind energy absorption rate and the safety of the whole machine under the typhoon condition are obtained.

[0020] 2. The blades realize pure mechanical locking through the electromagnetic drive cogwheel clutch, so that the service life of the worm gear reducer is prolonged.

[0021] 3. The electromagnetic drive cogwheel clutch realizes driving combination and blade locking.

[0022] 4. The blades realize the increase of impeller wind area through vertical shaft butt joint extension.

[0023] 5. The blades can be combined (i.e. used in series) according to the required power of the customer, so that the blade mold generalization is improved and the mold cost is reduced.

[0024] 6. The variable pitch angle of the blades can be intelligently optimized according to the power change under a certain wind speed to obtain the optimal variable pitch angle. DETAILED DESCRIPTION

[0025] Figure 1 It is a structural schematic view of the intelligent variable pitch anti typhoon vertical shaft wind turbine.

[0026] Figure 2 It is a structural schematic view of the intelligent variable pitch mechanism.

[0027] Figure 3 It is a structural schematic view of the intelligent variable pitch mechanism (intermediate sliding cogwheel and upper driving cogwheel engagement).

[0028] Figure 4This is the third structural diagram of the intelligent pitch mechanism (the middle sliding chainring engages with the lower fixed chainring).

[0029] Figure 5 Schematic diagram of the blade in the variable pitch working position.

[0030] Figure 6 Schematic diagram of the blades in the feathering braking position. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0032] 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 to obtain the maximum wind energy absorption rate and the safety of the whole machine under typhoon conditions.

[0033] Specifically, the intelligent variable pitch mechanism 1 comprises a worm gear reducer 101, a driving motor 102, and an electromagnetic driving cog clutch, the electromagnetic driving cog clutch comprising an upper driving cog disc 103, a middle sliding cog disc 104, a lower fixed cog disc 105, and an electromagnetic driving mechanical lever mechanism 106, wherein the top end of the vertical rotating shaft 202 is sequentially connected with the output end of the worm gear reducer 101 after passing through the lower fixed cog disc 105, the middle sliding cog disc 104, and the upper driving cog disc 103 upwards, the vertical rotating shaft 202 is bearing assembled with the support frame 203, the upper driving cog disc 103 is fixed on the output end of the worm gear reducer 101, the input end of the worm gear reducer 101 is connected with the driving motor 102, the lower fixed cog disc 105 and the electromagnetic driving mechanical lever mechanism 106 are fixed on the support frame 203, the lever 106-1 of the electromagnetic driving mechanical lever mechanism 106 is connected with the middle sliding cog disc 104, and the electromagnetic driving mechanical lever mechanism 106 can drive the middle sliding cog disc 104 to slide upwards and downwards on the vertical rotating shaft 202 to realize the occlusion locking with the upper driving cog disc 103 or the lower fixed cog disc 105, as shown in Figure 3 and Figure 4 .

[0034] Specifically, the blade module comprises at least one blade assembly, each blade assembly being composed of a vertical rotating shaft 202 and a blade 201 fixed on the vertical rotating shaft 202; when the blade module comprises two or more blade assemblies, the blade assemblies are connected in series to form an integral whole by the abutting and lengthening of the respective vertical rotating shafts 202, so as to increase the windward area of the impeller and further increase the power generation capacity, and in the embodiment, each blade module comprises two blade assemblies.

[0035] Specifically, the blade 201 is made of glass fiber or carbon fiber or aluminum alloy.

[0036] Specifically, the support frame 203 has a three-branch structure, that is, one branch 203-1 is provided with one blade module, and the included angle between two branches 203-1 is 120°, as shown in Figure 5 and Figure 6 .

[0037] Specifically, the driving motor 102 is a stepping motor or a servo motor.

[0038] The operation of the intelligent variable pitch anti-typhoon vertical axis wind turbine described above in the embodiment is as follows:

[0039] When the wind speed reaches the cut-in wind speed, the intelligent variable pitch mechanism 1 drives all the blades 201 to the variable pitch angle, as shown in Figure 5 , the blades 201 drive the support frame 203 to drag the generator 3 to generate electricity normally.

[0040] When the wind speed reaches the cut-out wind speed, the intelligent variable pitch mechanism 1 drives all the blades 201 to the parallel state, i.e. the feathering braking position, as shown in Figure 6 At this time, the wind cannot drive the blades 201 to rotate the support frame 203, and the generator 3 is in a state of stopping power generation.

[0041] Case 1: In the normal operation condition, the electromagnetic drive cog clutch works, and the intermediate sliding cog disc 104 is driven to slide up by the electromagnetic drive mechanical lever mechanism 106, first engaged with the upper driving cog disc 103, as shown in Figure 3 Then, the upper driving cog disc 103 is driven to drive all the blades 201 to the variable pitch working position by controlling the worm gear reducer 101, as shown in Figure 5 Then, the intermediate sliding cog disc 104 is driven to slide down by the electromagnetic drive mechanical lever mechanism 106, engaged with the lower fixed cog disc 105 to realize the blade position locking, as shown in Figure 4

[0042] Case 2: In the anti-tornado condition, the electromagnetic drive cog clutch works, and the intermediate sliding cog disc 104 is driven to slide up by the electromagnetic drive mechanical lever mechanism 106, first engaged with the upper driving cog disc 103, as shown in Figure 3 Then, the upper driving cog disc 103 is driven to drive all the blades 201 to the feathering braking position by controlling the worm gear reducer 101, as shown in Figure 6 Then, the intermediate sliding cog disc 104 is driven to slide down by the electromagnetic drive mechanical lever mechanism 106, engaged with the lower fixed cog disc 105 to realize the blade position locking, as shown in Figure 4

[0043] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to 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 pitch-changing mechanism (1), an impeller (2), a generator (3) and a tower (4), wherein 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 module is mounted on the support frame (203) via 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 pitch-changing mechanism (1) is mounted on the support frame (203), and one blade module is paired with one intelligent pitch-changing mechanism (1), the worm gear reducer (101) of the intelligent pitch-changing 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 realize independent pitch-changing; 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 speed reducer (101) is connected to the input end of the worm gear reducer (101) and the driving motor (102). The lower fixed tooth 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 tooth disc (104). The electromagnetic driven mechanical lever mechanism (106) can drive the middle sliding tooth disc (104) to slide up and down on the vertical shaft (202) to achieve engagement and locking with the upper driving tooth disc (103) or the lower fixed tooth disc (105).

2. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 1, characterized in that: The blade module comprises at least one blade assembly, and each blade assembly consists of a vertical rotating shaft (202) and a blade (201) fixed on the vertical rotating shaft (202).

3. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 2, characterized in that: The two blade assemblies in each blade module are butted against each other via respective vertical rotating shafts (202) and connected in series to form a whole.

4. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 2, characterized in that: The blades (201) are made of glass fiber, carbon fiber, or aluminum alloy.

5. 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 equipped with a blade module, and the angle between two arms is 120°.

6. 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).

7. The intelligent variable pitch typhoon resistant vertical axis wind turbine according to claim 1, characterized in that: The driving motor (102) is a stepping motor or a servo motor.

8. The method for operating the intelligent variable pitch typhoon resistant vertical axis wind turbine according to any one of claims 1 to 7, 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 the 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.

9. The method for operating the intelligent variable-pitch typhoon-resistant vertical axis wind turbine according to any one of claims 1 to 7, characterized in that: Including the following working conditions one and two: Working condition 1: Under normal operating conditions, the electromagnetically driven tooth clutch works, and the electromagnetically driven mechanical lever mechanism (106) drives the middle sliding tooth plate (104) to slide upward, first engaging with the upper driving tooth plate (103), and then controls the worm gear reducer (101) to drive the upper driving tooth plate (103) to drive all blades (201) to the pitch working position, and then drives the middle sliding tooth plate (104) to slide downward through the electromagnetically driven mechanical lever mechanism (106), and engages with the lower fixed tooth plate (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 tooth plate (104) to slide upward, first engaging with the upper driving tooth plate (103), and then controls the worm gear reducer (101) to drive the upper driving tooth plate (103) to drive all blades (201) to the feathering braking position, and then drives the middle sliding tooth plate (104) to slide downward through the electromagnetically driven mechanical lever mechanism (106), and engages with the lower fixed tooth plate (105) to achieve blade position locking.

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