CN204476670U - A kind of blade of wind-driven generator and wind-driven generator - Google Patents

Abstract

Blade of wind-driven generator involved by the utility model has: blade body, comprises with wheel hub rigidly connected stator blade and can the deflecting blade that deflects of opposite fixed blades; And arrangement for deflecting.When wind-driven generator is static, deflecting blade deflects several angle relative to stator blade, power suffered by the aerofoil profile power suffered by component compared with normal vane airfoil profile is in the movement direction large at the component of moving direction, the starting torque that can provide is large, therefore namely less wind speed can make wind wheel overcome the resistance of Transmitted chains thus drive wind wheel to rotate, so do not need to consume other energy can reach utilization to low wind speed, after wind wheel reaches certain rotating speed, deflecting blade does not deflect relative to stator blade, therefore also need not reduce under declared working condition and can reach the utilization to low wind speed to the utilization of wind energy.

Description

Wind power generator blade and wind power generator

technical field

The utility model relates to a blade of a wind power generator and a wind power generator, belonging to the field of wind power generation.

Background technique

At present, most of the blades of wind turbines are directly rigidly connected to the hub, and the design of the blades is based on the rated working conditions of the wind turbines, so that they can absorb wind energy to the greatest extent under the rated working conditions. However, this design makes the starting torque generated by the blades of the wind generator very small when starting, and when the wind speed is too small, it is not enough to overcome the resistance of the wind generator drive chain. Therefore, this kind of wind generator needs a relatively high wind speed to operate, and cannot utilize low wind speed.

There are currently two methods to achieve the utilization of low wind speed. One method is that the wind generator can be used as both a generator and a motor, and it can be used as a motor to drive the blades to rotate during the start-up phase of the wind generator, but this method needs to consume electric energy. At the same time, the requirements for generators and electronic components are relatively high, so this method is not practical.

Another method that does not consume electric energy and has no special requirements for generators and electronic components is to design the blades under the comprehensive consideration of the rated working conditions and starting performance of the wind turbine, and change the distribution of the pitch angle of each airfoil in the blade To improve the starting performance of the wind generator to achieve the utilization of low wind speed, however, this method will reduce the utilization of wind energy by the wind generator under the rated working condition.

Utility model content

The utility model is carried out in order to solve the above-mentioned problems, and the purpose is to provide a wind power generator blade and a wind power generator. Installing the blade enables the wind power generator to rotate at a low wind speed without reducing the wind power under the rated working condition. Utilization, so as to achieve the purpose of the utilization of low wind speed.

In order to achieve the above object, the utility model adopts the following structures.

<Structure 1>

The wind power generator blade involved in the utility model has: a blade body, including a fixed blade rigidly connected to the hub and a deflecting blade capable of deflecting relative to the fixed blade; and a deflection device, including a first track, a second track, a spring and a T T-shaped connecting rod, the first track and the second track are respectively arranged on both sides of the fixed blade width direction and extend along the blade length direction, and the opposite ends of the cross bar of the T-shaped connecting rod can be connected between the first track and the second Synchronous movement in the track, the front end of the vertical bar of the T-shaped connecting rod is fixedly connected with the deflecting blade, and the cross bar of the T-shaped connecting rod is elastically connected with the fixed blade.

Before the generator starts, the blades are at rest, and the opposite ends of the cross bar of the T-shaped connecting rod are located on the same side of the first track and the second track near the hub of the wind turbine, so that the deflecting blades deflect at a certain angle relative to the fixed blades.

After the generator starts, the blades rotate, and when the opposite ends of the T-shaped connecting rod move to the side away from the hub under the action of the centrifugal force, the deflecting blades and the fixed blades do not deflect.

Further, the wind power generator blade of the present invention also has the following features: there is an angle between the first track and the second track, and the centers of the two tracks coincide in space.

Further, the blade of the wind power generator of the present invention also has the following features: the two ends of the first track and the second track are provided with grooves, and the opposite ends of the T-shaped connecting rod move when they are in the grooves. subject to certain obstacles.

Further, the wind generator blade of the present utility model also has the following features: the cross bar of the T-shaped connecting rod and the fixed blade are connected by a spring, the front end of the spring is connected with the cross bar of the T-shaped connecting rod, and the end of the spring is fixed on the fixed blade .

<Structure 2>

The wind power generator involved in the utility model has: a wind wheel, wherein the wind wheel has multiple blades; and a power generation unit connected to the wind wheel and capable of converting the kinetic energy of the blade rotation of the wind wheel into electric energy, and the blade has: a blade body, It includes a fixed blade rigidly connected to the hub and a deflection blade capable of deflecting relative to the fixed blade; and a deflection device, including a first track, a second track, a spring and a T-shaped connecting rod, the first track and the second track are respectively arranged on the fixed Both sides in the width direction of the blade extend along the length direction of the blade. The opposite ends of the cross bar of the T-shaped connecting rod can move synchronously in the first track and the second track. The front end of the vertical bar of the T-shaped connecting rod is connected to The deflection blades are fixedly connected, and the cross bar of the T-shaped connecting rod is elastically connected with the fixed blades.

Before the generator starts, the blades are at rest, and the opposite ends of the cross bar of the T-shaped connecting rod are located on the same side of the first track and the second track near the hub of the wind turbine, so that the deflecting blades deflect at a certain angle relative to the fixed blades.

After the generator starts, the blades rotate, and when the opposite ends of the T-shaped connecting rod move to the side away from the hub under the action of the centrifugal force, the deflecting blades and the fixed blades do not deflect.

Further, the wind power generator of the present invention also has the following features: there is an angle between the first track and the second track, and the centers of the two tracks coincide in space.

Furthermore, the wind power generator of the present utility model also has the following features: grooves are provided at both ends of the first track and the second track, and the movement of the opposite ends of the T-shaped connecting rod is hindered to a certain extent when they are in the grooves.

Further, the wind generator of the present utility model also has the following features: the cross bar of the T-shaped connecting rod is connected with the fixed blade by a spring, the front end of the spring is connected with the cross bar of the T-shaped connecting rod, and the end of the spring is fixed on the fixed blade.

Function and effect of utility model

According to the wind power generator blade and the wind power generator of the utility model, because the blade has: a deflection device and a blade body, the blade body includes a fixed blade and a deflection blade. When the wind turbine is at rest, the deflecting blade deflects at a certain angle relative to the fixed blade, and the component force of the force on the airfoil in the direction of motion is larger than that of the force on the airfoil of the normal blade in the direction of motion. The starting torque is large, so a small wind speed can make the wind wheel overcome the resistance of the transmission chain and drive the wind wheel to rotate, so it can realize the use of low wind speed without consuming other energy. After the wind wheel reaches a certain speed, the deflection of the blades There is no deflection relative to the fixed blade, so the utilization of low wind speed can be achieved without reducing the utilization of wind energy under rated working conditions.

Description of drawings

Fig. 1 is the structural representation of the blade of wind power generator involved in the utility model in the embodiment;

Fig. 2 is a partial enlarged view of the deflection device of the blade of the wind power generator involved in the present invention;

Fig. 3 is a top view of the first track and the second track in the embodiment of the deflection device of the blade of the wind power generator involved in the present invention;

Fig. 4 is a schematic diagram of the stress on the ordinary blades in the start-up stage of the wind power generator involved in the present invention;

Fig. 5 is a schematic diagram of the force on the deflected blades during the start-up phase of the wind power generator involved in the present invention;

Fig. 6 is a schematic diagram of the positions of the deflecting blades of the wind generator involved in the starting phase and the running phase of the utility model; and

Fig. 7 is a partial structural diagram of the wind power generator involved in the present invention in an embodiment.

Detailed ways

The implementation process of the blades of the wind power generator and the wind power generator involved in the present invention will be described in detail below with reference to the accompanying drawings.

<Example 1>

Fig. 1 is a schematic structural view of an embodiment of a wind power generator blade involved in the present invention. As shown in FIG. 1 , a wind turbine blade 10 includes a fixed blade 11 , a deflecting blade 12 and a deflecting device 20 . The fixed blade 11 is rigidly connected to the hub of the wind turbine rotor, and the deflecting blade 12 is connected to the fixed blade 11 through a deflection device 20 , and can deflect at a certain angle relative to the fixed blade 11 . When the fixed blade 11 and the deflecting blade 12 are not deflected, they have the same shape as the common blade.

Fig. 2 is a partial enlarged view of the deflection device of the wind power generator blade involved in the utility model in an embodiment, and Fig. 3 is the first rail and the second rail in the embodiment of the deflection device of the wind power generator blade involved in the utility model top view in .

As shown in FIG. 2 , the deflection device 20 includes a first rail 21 , a second rail 22 , a T-shaped link 23 and a spring 24 . The front end of the spring 24 is fixed on the middle part of the crossbar of the T-shaped connecting rod 23, and the end of the spring 24 is fixed inside the fixed vane 11.

The first track 21 and the second track 22 are arranged on both sides of the blade width direction inside the fixed blade 11 and extend along the blade length direction. The two tracks are arc-shaped with equal length, and the distances between two corresponding points are equal. As shown in FIG. 3 , the first track 21 and the second track 22 intersect on different planes, and the centers of the two tracks coincide in space. The angle formed by the intersection of two tracks with different planes is θ, and grooves are provided at both ends of the first track 21 and the second track 22 .

The vertical bar of the T-shaped connecting rod 23 is fixed inside the deflection blade 12, and the two ends of the cross bar of the T-shaped connecting rod 23 can move synchronously in the first guide rail 21 and the second guide rail 22, and the T-shaped connecting rod 23 is on the first guide rail. 21 and the second guide rail 22 can drive the deflection blade 12 to deflect. As shown in Figure 1, the two ends of the cross bar of the T-shaped connecting rod 23 are provided with smooth protrusions. The projections at the two ends of the cross bar of 23 are in the grooves at the two ends of the two guide rails, and the movement is hindered to a certain extent. The T-shaped connecting rod 23 needs a certain external force to move. At this time, the deflecting blade 12 is in a relatively stable state; When the cross bar of the rod 23 is at any position between the first track 21 and the second track 22, the T-shaped connecting rod 23 is in the state of moving toward both ends of the track, and at this moment, the deflection blade 12 is in an unstable state.

Fig. 4 is a schematic diagram of force on a common blade during the start-up phase of the wind power generator involved in the present invention, and Fig. 5 is a schematic diagram of force on the deflected blade during the start-up phase of the wind power generator involved in the present invention. u is the rotation direction of the blade, F is the force on the ordinary blade, F' is the force on the deflected blade, and the vertical dotted line is the rotation plane of the wind rotor. In Fig. 5, the dotted circular curve is the deflecting blade. When the deflecting blade is at rest, the component force of the force F' in the direction of motion is large, and the generated moment is large. Therefore, at a relatively low wind speed, the resistance of the wind turbine drive chain can be overcome. Drive the wind wheel to rotate.

In Figure 4, the circular curve of the solid line is an ordinary blade, and when the normal blade is stationary, the component force of the force F in the direction of motion is small, and the generated moment is small, so a relatively high wind speed is required to overcome the wind turbine drive chain The resistance thus drives the wind wheel to rotate.

Fig. 6 is a schematic diagram of the positions of the deflecting blades of the wind power generator involved in the starting phase and the running phase of the utility model.

As shown in FIG. 6 , the solid-line circular curve graph is the position of the deflected blade at a relatively high wind speed, and the dotted-line circular curve graph is the position of the deflected blade at a static and low wind speed.

When the wind turbine is at rest, the cross bar of the T-shaped connecting rod 23 is at the left end of the first guide rail 21 and the second guide rail 22. At this time, the deflecting blade 12 deflects a certain angle relative to the fixed blade 11. , the deflection blades 12 are all in the position shown by the dotted circular curve.

When the wind speed increases and the wind wheel reaches a certain rotational speed, the centripetal force of the deflecting blade 12 increases, therefore, the pulling force provided by the spring 24 is less than the centripetal force required by the deflecting blade 12, and the T-shaped connecting rod 23 moves to the right, moving to the right end of the two tracks. During the process, the deflecting blade 12 is in an unstable state, and the cross bar of the T-shaped connecting rod 23 will move to the right end of the first guide rail 21 and the second guide rail 22 under the action of centrifugal force. At this time, the deflecting blade 12 and the fixed blade 11 There is no included angle between them, and the utilization rate of the corresponding wind energy of ordinary blades is achieved. When the wind force decreases, the tension provided by the spring 24 is greater than the centripetal force required by the deflecting blade 12, so the T-shaped connecting rod 23 is pulled back to the left end of the two tracks, the deflecting blade 12 forms a certain angle with the fixed blade 11, and the wind wheel operates at a low wind speed . When the wind speed is smaller, the wind wheel stops rotating. At this time, the deflecting blade 12 forms a certain angle with the fixed blade 11, which is convenient for starting next time.

<Example 2>

Fig. 7 is a partial structural diagram of the wind power generator involved in the present invention in an embodiment.

As shown in FIG. 7 , the wind generator 30 of the present invention includes a wind rotor 31 and a power generation unit 32 . The wind rotor 31 includes a plurality of blades 10 . The blade 10 comprises a fixed blade 11 , a deflecting blade 12 and a deflecting device 20 . Because the deflecting blades 12 of the blades 10 are deflected at a certain angle relative to the fixed blades 11, the wind generator 30 can generate electricity at a relatively low wind speed, thereby improving the utilization rate of low wind speeds.

Function and effect of embodiment

According to the wind power generator blade and the wind power generator involved in this embodiment, because the blade has: a deflection device and a blade body, the blade body includes a fixed blade and a deflection blade. When the wind turbine is at rest, the deflecting blade deflects at a certain angle relative to the fixed blade, and the component force of the force on the airfoil in the direction of motion is larger than that of the force on the airfoil of the normal blade in the direction of motion. The starting torque is large, so a small wind speed can make the wind wheel overcome the resistance of the transmission chain and drive the wind wheel to rotate, so it does not need to consume other energy, and does not need to reduce the utilization of wind energy under rated working conditions to achieve low wind speed. use.

In addition, there are grooves at both ends of the first track and the second track. When the deflection blade is stationary and rotates at a relatively high wind speed, the protrusions at both ends of the cross bar of the T-shaped connecting rod are in the grooves of the two tracks, and the movement is hindered to a certain extent. , so that the deflection blade is in a relatively stable state.

Claims (8)

1. a blade of wind-driven generator, is arranged on the wheel hub of wind turbines rotor, it is characterized in that, have:

Blade body, comprises and the rigidly connected stator blade of described wheel hub and can the deflecting blade that deflects of relative described stator blade; And

Arrangement for deflecting, comprises the first track, the second track and T-shaped connecting rod, and described first track and the second track are separately positioned on the both sides of described stator blade width direction and extend along length of blade direction,

Two ends relative on the cross bar of described T-shaped connecting rod can in described first track and the second track inter-sync campaign, and the front end of the montant of described T-shaped connecting rod is fixedly connected with deflecting blade, and the cross bar of described T-shaped connecting rod is connected with described stator blade elasticity,

Before described wind-driven generator starts, described blade is static, on the cross bar of described T-shaped connecting rod, relative two ends are positioned at described first track and the second track near wheel hub the same side of described wind-driven generator, make described deflecting blade deflect several angle relative to stator blade

After described wind-driven generator starts, described blade rotation, two ends relative on the cross bar of described T-shaped connecting rod, when described first track and the second track move to the side away from wheel hub under the influence of centrifugal force, make described deflecting blade and stator blade not deflect.

2. blade of wind-driven generator according to claim 1, is characterized in that:

Wherein, have an angle between described first track and the second track, and the center of two tracks spatially overlaps.

3. blade of wind-driven generator according to claim 1, is characterized in that:

Wherein, the two ends of described first track and the second track are provided with groove, and when two ends relative on described T-shaped connecting rod cross bar are in described groove, motion is subject to certain obstruction.

4. blade of wind-driven generator according to claim 1, is characterized in that:

Wherein, the cross bar of described T-shaped connecting rod is connected by spring with described stator blade, and the front end of described spring is connected with the cross bar of described T-shaped connecting rod, and the end of described spring is fixed on described stator blade.

5. a wind-driven generator, is characterized in that, has:

Wind wheel, described wind wheel has more blades and wheel hub, and described blades installation is on described wheel hub; And

The Power Generation Section that also kinetic transformation of the blade rotation of described wind wheel can be become electric energy is connected with described wind wheel,

Described blade has: blade body, comprises and the rigidly connected stator blade of described wheel hub and can the deflecting blade that deflects of relative described stator blade; And

Arrangement for deflecting, comprises the first track, the second track, spring and T-shaped connecting rod, and described first track and the second track are separately positioned on the both sides of described stator blade width direction and extend along length of blade direction,

Two ends relative on the cross bar of described T-shaped connecting rod can in described first track and the second track inter-sync campaign, the front end of montant is fixedly connected with deflecting blade, the front end of described spring is connected with the cross bar of described T-shaped connecting rod, and the end end of described spring is fixed on described stator blade

Before described wind-driven generator starts, described blade is static, on the cross bar of described T-shaped connecting rod, relative two ends are positioned at described first track and the second track near the wheel hub side of described wind-driven generator, make described deflecting blade deflect several angle relative to stator blade

After described wind-driven generator starts, described blade rotation, the relative two ends of described T-shaped connecting rod, when described first track and the second track move to the side away from wheel hub under the influence of centrifugal force, make described deflecting blade and stator blade not deflect.

6. wind-driven generator according to claim 5, is characterized in that:

Wherein, have an angle between described first track and the second track, and the center of two tracks spatially overlaps.

7. wind-driven generator according to claim 5, is characterized in that:

Wherein, the two ends of described first track and the second track are provided with groove, and when the relative two ends of described T-shaped connecting rod are in described groove, motion is subject to certain obstruction.

8. wind-driven generator according to claim 5, is characterized in that:

Wherein, the cross bar of described T-shaped connecting rod is connected by spring with described stator blade, and the front end of described spring is connected with the cross bar of described T-shaped connecting rod, and the end of described spring is fixed on described stator blade.