CN103867380B - Wind turbine fan blade tilt angle automatic adjustment mechanism - Google Patents

Abstract

The invention relates to an automatic adjusting mechanism for the inclination angle of a fan blade of a wind driven generator, which comprises: a first shell, through which fan blades are arranged, one end of the fan blade extending into the first shell is provided with a linkage part; a transmission unit connected to the first housing, the transmission unit being mechanically connected to a pump unit and a speed change assembly, the pump unit being mechanically connected to the speed change assembly, the pump unit being provided with an actuating unit, the actuating unit being connected to a transmission disc, the transmission disc being correspondingly connected to the linkage portion of the fan blade; the pump unit is driven by the difference between the rotating speeds of the speed changing assembly and the transmission unit to supply oil pressure to push the actuating unit to twist the transmission disc, so that the effect of automatically adjusting the inclination angle of the fan blades in a mechanical manner according to the wind speed is achieved. When the wind speed is too high, the relative inclination angle is increased to ensure that the effect of the wind speed on the fan blades is ineffective, so that the torque is reduced, the rotating speed is reduced, and the wind driven generator is protected.

Description

Wind turbine fan blade tilt angle automatic adjustment mechanism

technical field

The invention relates to an automatic adjustment mechanism for fan blade inclination angle of a wind power generator, especially a mechanism for automatically adjusting the fan blade angle of wind power generation according to the wind speed, thereby reducing the starting wind speed, improving the efficiency of wind power generation, and preventing the speed of the wind power generator. Those who are too high and damaged.

Background technique

In recent years, the phenomenon of global warming has become more and more serious. In order to attach importance to this issue, countries around the world have advocated environmental protection strategies such as energy saving and carbon reduction, and then developed alternative energy and renewable energy applications. Therefore, wind power generation is more popular in power generation equipment using renewable energy. It is the first choice; however, the wind speed is difficult to control, too high or too low wind speed can not make the wind generator to generate electricity normally, and the speed of the wind generator and the efficiency of power generation are not the same under different wind speeds, so how can we The effective use of wind energy for power generation has been a topic of extensive discussion in various circles.

The inclination angle, length and diversion area of the wind turbine blades all affect the rotational speed of the blades. Under the same wind speed, the larger the inclination angle of the blades, the greater the torque and air resistance will increase. Conversely, the smaller the inclination angle of the blades, the greater the torque and The air resistance will be smaller; therefore, in terms of different wind speeds, in order to make the fan blades achieve good power generation efficiency at a better speed, it is necessary to consider the wind speed and change the inclination angle, length and flow guide area of the fan blades. Among them, Changing the inclination angle of the fan blades is easier to achieve; therefore, the existing wind generator, as shown in Figure 1, the wind generator relies on an external wind speed sensing device to sense the external wind speed, the wind generator has A base 10 is connected to a housing 20, which is provided with a plurality of fan blades 201, and the housing 20 is provided with a receiving controller 30 corresponding to the wind speed sensing device to calculate the corresponding wind power generation under different wind speeds. In terms of the preferred inclination angle of the fan blade 201 of the machine, the receiving controller 30 is electrically connected to a motor 301, so that the motor 301 adjusts the inclination angle of the fan blade 201 through the transmission unit 302, and the housing 20 passes through a transmission shaft 202 in sequence Connecting a speed-increasing gear set 40 and a generator 50 can achieve the effect of improving wind power generation efficiency; however, the wind speed sensing device and the motor 301 need to constantly monitor the wind speed to adjust the angle of the fan blades, which will consume extra power.

Furthermore, when the wind speed is too high, the torque generated by the fan blade 201 will also increase accordingly, causing its rotational speed to increase significantly, resulting in an increase in the centrifugal force. At this time, the fan blade 201 will be easily broken, and the generator 50 will also overheat. and burnt, so the rotating speed needs to be limited. The existing wind generator is provided with a pair of electric drive deceleration mechanism 60 corresponding to the fan blade 201 between the base 10 and the housing 20. When the wind speed sensing device senses that the wind speed is too large , the electric drive deceleration mechanism 60 slows down the rotating speed of the fan blade 201; however, when the wind speed is high, the electric drive deceleration mechanism 60 needs to continue to decelerate the fan blade 201 in order to maintain the constant speed rotation of the fan blade 201, which will be quite Power consumption, and the continuous deceleration of the electric drive deceleration mechanism will easily lead to overheating and damage; when the wind speed is too strong, the electric drive deceleration mechanism 60 still cannot effectively stop the rotation of the fan blades, and the electric drive deceleration mechanism 60 is easy to damage and fail, and As a result, the fan blade 201 cannot decelerate and breaks.

A kind of wind power generator is provided in addition, please refer to Fig. 2 and shown in Fig. 3, and it installs empennage mechanism 701 in a wind power generator 70 and does deceleration, when because of wind speed too big so that rotating speed is too high, empennage 701 will The swing angle will make the wind turbine 70 change the windward direction, causing the wind generator 70 to reduce the force and reduce the speed; however, this design will cause the entire set of wind generators 70 to swing at any time, resulting in instability and fatigue.

As for the fixed fan blade, please refer to FIG. 4 , assuming that the wind speed is V _wind , and the angle of attack of the wind speed V _wind on the fan blade 80 is α, the length of the fan blade 80 is R, and the fan blade 80 is The rotating speed of blade 80 is N; Because the angle β of the inclination angle of the outer end of fan blade 80 is nearly 90°, so when the rotating speed N=0, the angle of attack α of wind speed V _wind to fan blade 80 is the same as that of fan blade 80 The angle of inclination β is almost vertical, so no thrust will be produced on the fan blade 80; and when the rotational speed N is very large, the angle of attack α also remains positive, because the fan blade 80 is fixed, so the angle of the inclination β is still Near 90°, as shown in Figure 5, the speed of the wind speed V _wind relative to the fan blade 80 is V, and the relational expression of the wind speed V _wind to the tangential velocity Vt generated by the fan blade 80 is And the _wind speed V _wind will generate a lift coefficient C _L on the fan blade 80 , the relationship between the lift coefficient C _L and the angle of attack α is shown in FIG. When it is greater than a certain value, the lift coefficient C _L will drop sharply, causing the speed N of the fan blade 80 to stall.

To sum up, the wind speed sensing device, motor and electric drive reduction mechanism of the existing wind turbines are expensive to manufacture, difficult to maintain, and cannot stop the rotation of the blades when the wind speed is too strong, and cannot make the blades rotate at the wind speed. When it is strong, it will continue to rotate at a constant speed, resulting in damage to the electric drive deceleration mechanism and fan blades and need to be replaced, and additional maintenance and sample maintenance costs will be borne. In addition, the deceleration mechanism using the tail swing will make the entire wind turbine swing at any time , resulting in instability and fatigue, so the existing wind generators still have concerns about not being applicable.

In view of this, our inventors are concentrating on further research on wind power generators, and proceeding to research and development and improvement, hoping to solve the above problems with a better design, and the present invention comes out after continuous testing and modification.

Contents of the invention

The purpose of the present invention is to solve the problem of wind speed sensing device, motor and electric drive reduction mechanism of existing wind power generators, which are expensive to manufacture, difficult to maintain, unable to stop the rotation of the fan blades when the wind speed is too strong, and unable to make the fan blades rotate at the wind speed. When it is strong, it will continue to rotate at a constant speed, so the electric drive deceleration mechanism and fan blades will be damaged and need to be replaced, and additional maintenance and sample maintenance costs will be borne. The start-up wind speed will be effectively reduced to maintain good power generation efficiency.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An automatic adjustment mechanism for fan blade inclination angle of a wind power generator, characterized in that it includes:

A first casing, which is provided with a fan blade penetrating through it, and the end of the fan blade protruding into the first casing is provided with a linkage part; and,

A transmission unit, which is connected to the first casing, the transmission unit is mechanically connected to a pump unit and a speed change assembly, the speed change assembly changes the speed transmitted by the transmission unit, and the pump unit and the speed change assembly are mechanically connected Link, the pump unit is provided with an actuation unit, the actuation unit is connected to a transmission plate, and the transmission plate is correspondingly connected to the interlocking part of the fan blade; the interlocking part is a gear, and the transmission disc is corresponding to the interlocking part tooth plate.

With the above structure, the pump unit is driven by the speed difference between the transmission assembly and the transmission unit, so that the transmission disc is twisted by the actuation unit, and then the inclination angle of the fan blade is adjusted to improve the efficiency of wind power generation. Therefore, if the pump unit When driven by the difference in rotational speed, the actuating unit is used to twist the transmission disc by an angle of θ, so that the inclination angle corresponding to the pivoting of the fan blade is β; when the rotational speed of the first housing is zero, that is, the fan blade is not normally driven by the wind speed When the rotation speed of the first casing is greater than a certain value, the inclination angle β of the fan blade is an angle corresponding to the wind speed and does not generate torque. angle to prevent wind turbines from being damaged due to excessive speed.

According to the above-mentioned automatic adjustment mechanism for blade inclination of the wind power generator, the blade is connected between the power generation devices and has a mechanical adjustment mechanism for blade inclination, which includes:

The pump unit, which is an oil pressure pump, is driven by the speed difference between the transmission unit and the speed change assembly. The actuation unit includes an oil pressure cylinder, which is connected to a linkage, and the linkage is connected to the transmission shaft through a transmission shaft. The transmission plate, in this way, the actuating unit relies on the pump unit to supply hydraulic fluid to make the linkage drive the transmission shaft and the transmission plate to twist, and then pivot the fan blade through the transmission plate, so that the fan blade can be automatically adjusted mechanically inclination;

Inside the hydraulic cylinder, there is a resisting piece, which is connected to the linkage, and an elastic body is provided between the oil pressure cylinder and the resistance to assist the pump unit to twist the linkage , which in turn drives the transmission shaft and the transmission disc to rotate; and,

An elastic member is located at the end of the linkage member opposite to the transmission shaft and the hydraulic cylinder. Since the pump unit is driven by the speed difference between the transmission unit and the transmission unit, if the wind speed decreases and the speed difference decreases or becomes zero, The elastic member can reversely twist the linking member to drive the drive shaft and the drive plate to twist, and then pivot the fan blade through the drive plate to change the inclination angle of the fan blade to reduce the starting wind speed and achieve good power generation efficiency.

According to the above-mentioned automatic adjustment mechanism for the fan blade inclination angle of the wind power generator, it further has a second housing, which is correspondingly connected and covers the transmission unit, and the second housing is further provided with an empennage to swing the present invention. , so that the fan blade is in the windward direction.

With the above arrangement, the present invention does not need to adjust the inclination angle of the fan blade by electric power by detecting the wind speed, and does not have the setting of an electric drive reduction mechanism, but automatically adjusts the inclination angle of the fan blade mechanically, only through the first casing. The pump unit is correspondingly driven by the rotating speed, so that the pump unit correspondingly twists the linkage member, the transmission shaft and the transmission disc to adjust the inclination angle of the fan blade, and when the rotation speed of the first housing exceeds a certain value, the fan The inclination angle of the blade is an angle corresponding to the wind speed without generating torque, that is, the blade is parallel to the direction of the wind speed, so that the wind speed cannot generate torque to the blade, so the first housing will stall without rotating, thus stopping power generation , the fan blade will not be broken due to the strong wind speed, nor will the power generation device be burned due to the excessive speed of rotation, and the inclination angle of the fan blade can be adjusted according to the wind speed and the rotation speed can be prevented from being too fast without consuming electric power. Therefore, it is obvious The manufacturing cost and power generation cost of the present invention are far lower than the existing wind power generators, and the present invention is also easier to maintain, has strong durability, and has the function of automatically adjusting fan blades to improve power generation efficiency.

Description of drawings

Fig. 1 is the schematic sectional view of the structure of the existing electric drive to adjust the inclination angle of the fan blade;

Fig. 2 is the three-dimensional schematic diagram of existing empennage mechanism wind-driven generator;

Fig. 3 is a schematic cross-sectional view at position A-A of Fig. 2;

Fig. 4 is a three-dimensional schematic diagram of the fan blade of the existing fixed fan when it is not rotating, and the end of the fan blade is affected by the wind speed;

Fig. 5 is a three-dimensional schematic diagram of the fan blade of the existing fixed fan rotating, and the end of the fan blade is affected by the wind speed;

Fig. 6 is a schematic diagram of the relationship between the lift coefficient and the angle of attack of the existing fixed fan blades affected by the wind speed;

Fig. 7 is a schematic perspective view of the present invention;

Fig. 8 is a three-dimensional exploded schematic view of the present invention;

Fig. 9 is a schematic cross-sectional view of the position BB in Fig. 8;

Fig. 10 is a schematic diagram of the actuating unit of the present invention when the rotational speed is zero;

Fig. 11 is a schematic diagram of the actuation unit of the present invention when the rotational speed is not zero;

Fig. 12 is a schematic diagram of the corresponding action of the fan blade and the transmission disc when the present invention is in operation;

Fig. 13 is a schematic diagram of the relationship between the rotational speed N1 of the _first housing and the rotational speed _N2 of the central shaft in the present invention;

Fig. 14 is a schematic diagram of the relationship between the rotational speed difference N ₂ -N ₁ and the pressure value P of the hydraulic fluid supplied by the pump unit in the present invention;

15 is a schematic diagram of the fan blade of the present invention when it is susceptible to wind speed V _wind and generates torque;

Fig. 16 is a schematic diagram of the fan blade tip affected by wind speed when N ₁ =0 according to the present invention;

Fig. 17 is a schematic diagram _of the relationship between the present invention and the existing inclination angle β and the rotational speed N1;

Fig. 18 is _a schematic diagram of the relationship between the rotational speed N1 and the wind speed V _wind of the present invention;

Fig. 19 is a schematic diagram of the fan blade tip affected by wind speed in the normal interval of the present invention;

Fig. 20 is a schematic diagram of the fan blade tip affected by wind speed in the stall interval of the present invention;

FIG. 21 is a schematic diagram of the fan blade inclination angle β of the present invention corresponding to the wind speed V _wind without torque generation.

Description of reference signs: 10. Base; 20. Housing; 201. Fan blade; 30. Receiving controller; 301. Motor; 302. Transmission unit; Drive deceleration mechanism; 70. Wind generator; 701. Empennage; 80. Fan blade; 1. First housing; 11. Fan blade; 111. Linkage part; 2. Transmission unit; 3. Pump unit; 31. Actuating unit; 311. Hydraulic cylinder; 312. Linkage piece; 313. Transmission shaft; 314. Resisting piece; 315. Elastic body; Components; 41. Central shaft; 5. Generating device; 6. Transmission disc; 7. Second housing; 71. Empennage.

detailed description

Please refer to Fig. 7 to Fig. 14 first, the present invention is an automatic adjustment mechanism for blade inclination of a wind power generator, which includes:

A first casing 1, which is provided with a fan blade 11 through it, and the end of the fan blade 11 intended to extend into the first casing 1 is provided with a linkage part 111, and the linkage part 111 is a gear;

A transmission unit 2, which is connected to the first housing 1, the transmission unit 2 is mechanically connected to a pump unit 3 and a speed change assembly 4, the speed change assembly 4 changes the speed transmitted by the transmission unit 2, and the pump The unit 3 is mechanically connected with the speed change assembly 4, and the speed change assembly 4 is oppositely connected to one end of the pump unit 3, and a power generating device 5 is further provided. The pump unit 3 is provided with an actuation unit 31, and the actuation unit 31 is connected to a transmission disc 6. The transmission disc 6 is correspondingly connected to the linkage part 111 of the fan blade 11, and the transmission disc 6 is a toothed disc corresponding to the linkage part 111; when the rotation speed of the first housing 1 is zero, the fan blade 11 The inclination angle of the fan blade 11 is an angle that is easily affected by the wind speed and generates torque, so that the start-up wind speed is reduced; and when the rotation speed of the first casing 1 is greater than a certain value, the inclination angle of the fan blade 11 is an angle that does not generate torque corresponding to the wind speed, so as to prevent The wind turbine rotates too high and is damaged;

The pump unit 3 is an oil pressure pump. The actuating unit 31 is supplied with hydraulic fluid 32 by means of the pump unit 3 to make the actuating unit 31 twist. The actuating unit 31 includes an oil hydraulic cylinder 311 connected to a linkage 312, the linkage 312 is connected to the transmission disc 6 through a transmission shaft 313, the hydraulic cylinder 311 is provided with a check member 314, the check member 314 is connected to the linkage 312, the hydraulic cylinder An elastic body 315 is provided between 311 and the resisting member 314, and an elastic member 316 is further provided at the end of the linking member 312 opposite to the transmission shaft 313 and the hydraulic cylinder 311; and,

A second housing 7, which is correspondingly connected to and covers the transmission unit 2, and the second housing 7 is further provided with a tail 71, which makes the fan blade 11 in the windward direction by means of swinging the present invention;

Please refer to Fig. 7 to Fig. 14 for the operating state of the present invention. Assuming that the rotational speed of the first casing 1 is N ₁ , when N ₁ =0, the inclination angle of the fan blade 11 is susceptible to wind speed and generates torque. angle to facilitate starting at low wind speeds and reduce the starting wind speed; when the fan blade 11 is subjected to wind speed to generate torque, the fan blade 11 drives the first casing 1 to rotate, and the first casing 1 synchronously drives the The transmission unit 2 and the pump unit 3 rotate synchronously at _a rotational speed of N1; the transmission assembly 4 has a central shaft 41, and the transmission assembly 4 amplifies the rotational speed transmitted by the transmission unit 2 so that the rotational speed of the central shaft 41 is _N2 , please refer to shown in Figure 13, the relational expression of rotating speed N ₁ and rotating speed N ₂ is N ₂ =kN ₁ , wherein, k is a constant greater than 1, and the central axis 41 is the generating device 5, so as to rapidly drive the generating device 5 , to improve the efficiency of power generation; and the other end of the central shaft 41 is connected to the pump unit 3, so that the rotational speed N 1 of the transmission unit 2 and the rotational speed N ₂ of the transmission assembly 4 for the pump unit ₃ produce a rotational speed difference, the rotational speed The poor relationship looks like this:

N ₂ -N ₁ =kN ₁ -N ₁ =(k-1)N ₁

The pressure value of the hydraulic fluid supplied by the pump unit 3 is P, and its relationship with the speed difference N ₂ -N ₁ is shown in Figure 14, which means that the greater the value of the speed difference N ₂ -N ₁ , the pump unit 3 The pressure value P of the supply hydraulic fluid is larger.

10 to 14, the pump unit 3 is provided with an oil pipe 33, and the pump unit 3 communicates with the hydraulic cylinder 311 by means of the oil pipe 33, and the pressure value P of the hydraulic fluid 32 supplied by the pump unit 3 is determined by The oil pipe 31 is input into the hydraulic cylinder 311, as shown in FIG. 11 , and the elastic body 315 is used to assist in resisting to lift the resisting member 314, and the resisting member 314 forms a moment to twist the linkage member 312, The linking part 312 compresses the elastic part 316, and synchronously twists the transmission shaft 313 and the transmission disc 6, and the transmission disc 6 adjusts the inclination angle of the fan blade 11 by pivoting the linkage part 111, as shown in the figure As shown in 12, the transmission disc 6 is a toothed disc, which is lifted by the resisting member 314 and twisted at an angle of θ, and the interlocking part 111 is a gear corresponding to the transmission disc 6, so when the transmission disc 6 is twisted by θ Angle, the interlocking part 111 and the fan blade 11 correspond to the inclination of the pivot angle β, and when the fan blade 11 is driven by the wind speed to rotate the fan blade 11 and the first housing 1 synchronously, the interlocking part 111 is connected to the transmission disc 6, and the transmission unit 2, the pump unit 3 and the actuating unit 31 also rotate synchronously, but the pump unit ₃ driven by the speed difference _N2 -N1, which supplies the hydraulic fluid The pressure value P will additionally twist the linkage 312, the transmission shaft 313 and the transmission disc 6 by an angle θ, so that the fan blade 11 will pivot correspondingly to the inclination angle of the β angle, so as to achieve the effect of adjusting the inclination angle of the fan blade 11 by wind speed .

Please refer to Figure 13 and Figure 14 again. When the wind speed gradually weakens, the value of the speed difference N ₂ -N ₁ will decrease accordingly. The pump unit 3 driven by the speed difference N ₂ -N ₁ will supply the hydraulic fluid. Therefore, the pressure value P is also reduced, causing the resisting member 314 to descend, and the originally compressed elastic member 316 is elastically recovered, and the linkage member 312 is reversely twisted, so that the θ angle of the transmission disc 6 is reduced. Furthermore, the β angle of the inclination angle of the fan blade 11 is reduced, as shown in FIG. 15 , so that the fan blade 11 is more susceptible to wind speed and generates torque.

Please continue to refer to Fig. 16. As far as the fan blade 11 is concerned, the end of the fan blade 11 is most susceptible to wind force and generates moment. Therefore, if the wind speed is V _wind , when N ₁ =0, the end of the fan blade 11 The inclination angle is the angle β that is easily affected by the wind speed and generates torque, as shown in Figure 15, which is beneficial to start at low wind speed and reduce the start-up wind speed; and when the wind speed V _wind gradually increases to the start-up wind speed, and the speed N ₁ is still as follows In the normal range shown in Figure 17 and Figure 18, the relationship between the inclination angle β of the fan blade 11 in Figure 17 and the rotation speed N ₁ , and the relationship between the rotation speed N ₁ and the wind speed V _wind is shown in Figure 18, please refer to Figure 17 to As shown in Figure 19, the wind speed V _wind forms the relative blade speed V and attack angle α to the fan blade 11, so that the fan blade 11 and the first casing ₁ rotate at a speed N1, and the angle θ of the twist of the transmission disc 6 is gradually As the fan blade 11 is lifted, the inclination angle β of the fan blade 11 also increases accordingly. Assuming that the length of the fan blade 11 is R, the relational expression of the tangential velocity Vt generated by the wind speed V _wind to the fan blade 11 is as follows: And when the wind speed V _wind makes the rotational speed N ₁ too large, the rotational speed N ₁ is located in the stall interval shown in Figure 17 and Figure 18, then please refer to Figure 17, Figure 18 and Figure 20, the inclination β and attack The angle α will increase with the wind speed V _wind to slow down the rate of increase of the speed N ₁ , so that the present invention can maintain the speed N ₁ within a certain wind speed V _wind ; the present invention and the existing fixed fan blades have the same inclination angle β and The relationship _of the rotational speed N1 is shown in Figure 17. It is obvious that the present invention can control the rotational speed N1 without stalling by means of the inclination angle β of the fan blade 11 in the stall interval _; The inclination angle of the fan blades cannot be adjusted, so the wind speed V _wind increases, and the speed N ₁ also increases, thus causing the fan to stall; in the present invention, when the wind speed V _wind exceeds a critical value φ, the inclination angle β of the fan blade 11 is corresponding to the wind speed V _wind does not generate torque, that is, as shown in Figure 18 and Figure 21, the fan blade 11 is parallel to the direction of the wind speed V _wind , so that the wind speed V _wind cannot generate torque on the fan blade 11 and rotate the fan blade 11 And the first casing 1, and then make the fan blade 11 and the first casing 1 stall and cannot continue to rotate to generate electricity, so as to prevent the fan blade 11 from breaking due to excessive rotation speed.

By the above description and setting, it is obvious that the present invention mainly has the following advantages and effects, which are detailed as follows one by one:

1. The present invention drives the pump unit to supply the pressure value P of the hydraulic fluid through the rotational speed difference N ₂ -N ₁ to adjust the inclination angle of the fan blade without electric drive, and the present invention does not need to drive the fan blade through an electric drive reduction mechanism. Forced deceleration, and when the wind speed increases until the rotational speed N ₁ of the first casing is greater than a certain value, the inclination angle of the fan blade is at an angle corresponding to the wind speed and does not generate torque, so that the fan blade and the first casing stall and cannot continue Rotate to generate electricity, prevent the fan blade from breaking due to too fast speed, or cause the power generation device to burn out due to too fast speed, so the present invention does not need to install an electric-driven wind speed sensing device, motor and electric-driven deceleration mechanism, and it is obvious that the present invention greatly reduces The cost of construction and power generation is lower than that of the existing wind turbines, and it is easier to maintain, has higher durability, and has the function of automatically adjusting the fan blades to improve the efficiency of power generation.

2. When the present invention is not normally driven by wind speed, the inclination angle β of the fan blade is an angle that is easily affected by wind speed and generates torque, so as to reduce the start-up wind speed and improve the power generation efficiency and wide applicability of the present invention.

3. When the present invention is in the stall interval, the fan blade inclination angle β and attack angle α will increase with the wind speed V _wind to slow down the increase of the rotational speed N ₁ , so that the present invention can maintain the rotational speed N ₁ within a certain wind speed V _wind ; As shown in Figure 17, the present invention relies on the fan blade inclination angle β to control the speed N ₁ without stalling in the stall interval, and as shown in Figure 18, when the wind speed V _wind exceeds a critical value φ, the fan blade inclination angle β That is, the angle corresponding to the wind speed V _wind does not generate torque, preventing the fan blade from breaking due to excessive speed; in contrast to the existing fixed fan blades, because the blade inclination angle cannot be adjusted, the wind speed V _wind increases, and the speed N ₁ also increases. Thereupon increase, thereby cause fan to stall, or must continue to decelerate fan blade with electric drive decelerating mechanism and have the worry of damage, so obviously the present invention has wider applicability and durability.

Claims (10)

1. A mechanism for automatically adjusting the inclination angle of a wind turbine blade, characterized in that it comprises: A first casing, which is provided with a fan blade penetrating through it, and the end of the fan blade protruding into the first casing is provided with a linkage part; and, A transmission unit, which is connected to the first casing, the transmission unit is mechanically connected to a pump unit and a speed change assembly, the speed change assembly changes the speed transmitted by the transmission unit, and the pump unit and the speed change assembly are mechanically connected connection, the pump unit is provided with an actuation unit, the actuation unit is connected to a transmission plate, and the transmission plate is correspondingly connected to the linkage part of the fan blade; The pump unit is driven by the speed difference between the speed change assembly and the transmission unit, so as to twist the transmission disc through the actuating unit, thereby adjusting the inclination angle of the fan blade. 2 . The automatic adjustment mechanism for blade inclination of a wind power generator according to claim 1 , wherein the interlocking part is a gear, and the transmission disc is a toothed disc corresponding to the interlocking part. 3 . 3. The automatic adjustment mechanism for fan blade inclination angle of wind power generator according to claim 1, characterized in that, when the rotational speed of the first casing is zero, the inclination angle of the fan blade is at an angle that is susceptible to wind speed and generates torque; When the rotation speed of the first casing is greater than a certain value, the inclination angle of the fan blade is an angle corresponding to the wind speed without generating torque. 4 . The automatic adjustment mechanism for blade inclination of a wind power generator according to claim 1 , wherein a power generating device is provided at the end of the transmission assembly opposite to the pump unit. 4 . 5 . The automatic adjustment mechanism for fan blade inclination angle of a wind power generator according to claim 1 , wherein the pump unit is an oil pressure pump, and the actuating unit is twisted by supplying hydraulic fluid through the pump unit. 6 . 6. The automatic adjustment mechanism for the fan blade inclination angle of a wind power generator according to claim 5, wherein the actuating unit comprises an oil pressure cylinder, which is connected to a linkage, and the linkage is connected to the The transmission disc. 7. The automatic adjustment mechanism for the fan blade inclination angle of a wind power generator according to claim 6, wherein the hydraulic cylinder is provided with a resisting member, and the resisting member is connected to the linkage member, and the hydraulic cylinder and the An elastic body is arranged between the resisting pieces. 8 . The automatic adjustment mechanism for blade inclination of a wind power generator according to claim 6 , wherein an elastic member is provided at one end of the linkage member opposite to the transmission shaft and the hydraulic cylinder. 9 . 9 . The automatic adjustment mechanism for fan blade inclination of a wind power generator according to claim 1 , further comprising a second housing correspondingly connected to and covering the transmission unit. 10 . 10 . The automatic adjustment mechanism for blade inclination of a wind power generator according to claim 9 , wherein the second housing is further provided with an empennage. 11 .