CN212225436U - Wind wheel structure of vertical axis wind turbine based on the reuse of horizontal axis wind turbine blades - Google Patents

Abstract

The utility model discloses a vertical axis wind turbine wind wheel structure based on the reuse of horizontal axis wind turbine blades, which relates to the technical field of wind turbine power generation. It mainly includes a main support part and a new blade, the new blade is the middle effective section left after cutting both ends of the original horizontal axis wind turbine blade; the outer circumference of the main support part is installed with a plurality of the new blades, the main support The components can drive the generator to rotate under the action of wind power to achieve the purpose of generating electricity. The vertical axis wind turbine wind turbine structure based on the reuse of the horizontal axis wind turbine blades proposed by the utility model not only realizes the effective reuse of the large horizontal axis wind turbine blades that meet the service life, but also uses the effective section of the original blade to apply The vertical axis wind turbine effectively improves the wind energy utilization rate of the vertical axis wind turbine and has strong practicability.

Description

Wind wheel structure of vertical axis wind turbine based on the reuse of horizontal axis wind turbine blades

technical field

The utility model relates to the technical field of wind turbine power generation, in particular to a wind wheel structure of a vertical axis wind turbine based on the reuse of horizontal axis wind turbine blades.

Background technique

Large horizontal axis wind turbines are one of the main equipments for converting wind energy into electrical energy. Among them, the blade is one of the main components of the horizontal axis wind turbine to capture wind energy. Horizontal axis wind turbines have relatively high wind energy utilization rate and mature technology, so large-scale wind farms around the world are basically composed of horizontal axis wind turbines, and the current single-machine capacity and blade length are in a trend of increasing.

At present, the general design life of large horizontal axis wind turbines on land is 20 years. According to the development history of the wind power industry, there will be a large number of large horizontal axis wind turbines reaching their service life at present and even in the future. At this time, wind turbines that meet the service life will face the problem of discarding the whole machine or components. However, the blades are not easily damaged and still have the value of continued use. At the same time, compared with horizontal axis wind turbines, the development of vertical axis wind turbines is slower than that of horizontal axis wind turbines in terms of single machine capacity and wind energy utilization. However, the vertical axis wind turbine has the advantages of simple structure, simple and diverse blade shapes and various wind rotor structures.

To sum up, how to solve the problem of decommissioning large horizontal axis wind turbine blades, and propose an environmentally friendly and low-cost method for the reuse of large horizontal axis wind turbine blades, so that the retired blades can be efficiently used in vertical axis wind turbines to improve the vertical axis. The potential of the wind energy utilization rate of the wind turbine is the technical problem to be solved urgently in the present invention.

Utility model content

The purpose of the utility model is to provide a vertical axis wind turbine wind turbine structure based on the reuse of horizontal axis wind turbine blades, which not only realizes the reuse of large horizontal axis wind turbine blades that meet the service life, but also can improve the vertical axis wind power. The wind energy utilization rate of the machine can effectively solve the above technical problems.

For achieving the above object, the utility model provides the following scheme:

The utility model provides a vertical axis wind turbine wind wheel structure based on the reuse of horizontal axis wind turbine blades. A plurality of the new blades are installed on the outer periphery of the main support member, and under the action of the wind, the main support member rotates, thereby driving the rotor of the generator to rotate to achieve the purpose of generating electricity.

Optionally, the middle effective section starts from the position of the maximum chord length of the original horizontal axis wind turbine blade, and ends at a section that is 85% of the length of the original horizontal axis wind turbine blade.

Optionally, each section of the new blade is in the shape of an airfoil.

Optionally, the main support member includes a main shaft, the top and bottom ends of the main shaft are respectively installed with an upper main bracket and a lower main bracket, and both ends of the new blade are respectively connected to the upper main bracket and the lower main bracket. main bracket.

Optionally, the upper main support includes a blade tip support and a plurality of connecting short rods with length adjusters, the connecting short rods are evenly distributed on the outer circumference of the main shaft; one end of the connecting short rods is connected On the main shaft, the other end is connected to the blade tip support, and the blade tip support is used to connect the small head end of the new blade.

Optionally, the surface shape of the support at the tip end of the blade is in the shape of an airfoil, and the surface area is larger than the end surface area of the small tip end of the new blade.

Optionally, the lower main support includes a blade bottom end support and a plurality of connecting long rods with length adjusters, the connecting long rods are evenly distributed on the outer circumference of the main shaft; one end of the connecting long rods It is connected to the main shaft, and the other end is connected to the support at the bottom end of the blade, and the support at the bottom end of the blade is used for connecting the big end of the new blade.

Optionally, the shape of the surface of the support at the bottom end of the blade is in the shape of an airfoil, and the surface area is larger than the area of the end surface of the large end of the new blade.

Optionally, the main support component further includes a sub-support; the sub-support includes a plurality of cables, the cables are evenly distributed on the outer circumference of the main shaft, one end of the cable is connected to the main shaft, and the other end is connected to the main shaft. One end is connected to the middle of the new blade through a non-slip latch.

The utility model has achieved the following technical effects with respect to the prior art:

The vertical axis wind turbine wind turbine structure based on the reuse of the horizontal axis wind turbine blades proposed by the utility model not only realizes the effective reuse of the large horizontal axis wind turbine blades that meet the service life, but also uses the effective section of the original blade to apply The vertical axis wind turbine effectively improves the wind energy utilization rate of the vertical axis wind turbine and has strong practicability.

In addition, in the wind wheel structure of the vertical axis wind turbine of the present invention, a blade end support is provided to connect with the end of the new blade, which has the effect of reducing the loss of the blade end; at the same time, the wind wheel structure of the vertical axis wind turbine is integral Adopting trapezoidal design (small on the top and large on the bottom), the pitch design of large-scale horizontal-axis wind turbine blades is transformed into the torque balance and stall control functions of fixed-pitch blades, which is conducive to improving the wind energy utilization rate of the wind-wheel structure of vertical-axis wind turbines .

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the overall schematic diagram of the wind wheel structure of the vertical axis wind turbine of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left side view of Fig. 1;

4 is a schematic diagram of the reuse principle of the original blade in the horizontal axis wind turbine of the present utility model;

Fig. 5 is the working principle diagram of the wind wheel structure of the vertical axis wind turbine of the present invention;

Wherein, the reference signs are: 1. Original horizontal axis wind turbine blade; 2. New blade; 3. Main shaft; 4. Upper main support; 5. Lower main support; 6. Blade tip support; 7. Length adjuster ;8. Connect the short rod; 9. The blade bottom end support; 10. Connect the long rod; 11. Cable; 12. Anti-skid lock; 13. Motor end connecting shaft; Flange; 16. The position of the maximum chord length.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The purpose of the utility model is to provide a vertical axis wind turbine wind turbine structure based on the reuse of horizontal axis wind turbine blades, which not only realizes the reuse of large horizontal axis wind turbine blades that meet the service life, but also can improve the vertical axis wind power. wind energy utilization of the machine.

In order to make the above objects, features and advantages of the present utility model more clearly understood, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Example 1:

As shown in Figures 1-3, the present embodiment provides a vertical axis wind turbine wind wheel structure based on the reuse of horizontal axis wind turbine blades, and the main shaft 3 with the upper flange 14 and the lower flange 15 is the entire device the main support part. Wherein, the main shaft 3 is provided with an upper main support 4, a sub support and a lower main support 5 in sequence from the bottom, and the upper main support 4, the auxiliary support and the lower main support 5 are all uniformly distributed in the circumferential direction with the main shaft 3 as the center . The new blades 2 are evenly distributed on the circumference centered on the main shaft 3 through the upper main support 4 , the lower main support 5 and the auxiliary support.

In this embodiment, as shown in Figures 1-2, the connecting short rod 8 with the length adjuster 7 and the blade tip support 6 are connected to form the upper main bracket 4, and one end of the connecting short rod 8 is connected to the upper part of the main shaft 3 On the flange 14, and each connecting short rod 8 is evenly installed in the circumferential direction of the upper flange 14, the other end of the connecting short rod 8 is connected to the blade tip support 6, and the blade tip support 6 is used for connecting with the new blade. Small head end, that is, the top connection installation.

Further, as shown in Figure 1-2, the connecting rod 10 with the length adjuster 7 and the blade bottom end support 9 are connected to form the lower main bracket 5, and one end of the connecting rod 10 is connected to the lower method of the main shaft 3. On the flange 15, and each connecting rod 10 is evenly installed in the circumferential direction of the lower flange 15, the other end of the connecting rod 10 is connected to the blade bottom end support 9, and the blade bottom end support 9 is used to connect with the new blade. The big end, that is, the bottom connection is installed. Wherein, the length of the connecting long rod 10 is longer than that of the connecting short rod 8, so that the entire wind wheel structure has a trapezoidal structure with a small upper part and a large lower part.

The above-mentioned length adjuster 7 can adopt any existing length adjustment structure for adjusting the length of the connecting rod, such as a telescopic rod segment structure.

Further, as shown in Figures 1-3, one end of the cable 11 of the sub-support is connected to the lower flange 15 of the main shaft 3, and each cable 11 is installed evenly in the circumferential direction of the flange, and the other end of the cable 11 is installed with The anti-skid lock 12 in the middle of the new blade 2 is connected; the connecting shaft 13 at the motor end is connected with the lower flange 15 through the flange, and is used to drive the main shaft 3 to rotate. Among them, the cable 11 is preferably a steel cable structure, and the anti-slip lock 12 is an existing structure, which is used to fix the connection cable 11, and can slide and adjust and lock the position on the blade. The specific structure and working principle are here. No longer.

In this embodiment, by adjusting the lengths of the short connecting rods 8 , the long connecting rods 10 and the cables 11 , the installation angle of the new blade can be adjusted until the new blade reaches the preset working position.

In this embodiment, as shown in FIG. 4 , the new blade 2 utilizes the effective section of the original horizontal axis wind turbine blade 1 , that is, the section from the maximum chord length position 16 of the original blade to 85% of the blade length. Generally, the blade of a large horizontal-axis wind turbine has a certain twist angle from the position of the maximum chord length to the position of 85% L, and the airfoil at about 85% L has the optimal lift-drag ratio. Compared with the vertical axis wind turbine, it will help to improve the wind energy utilization rate of the vertical axis wind turbine.

In this embodiment, each section of the new blade 2 after molding is in the shape of an airfoil.

The specific working principle of this embodiment will be described below. Among them, the new leaves are preferably 3 evenly distributed.

As shown in Figure 5, since each section of the new blade 2 is an airfoil shape, when the wind speed U _∞ reaches a certain speed, the new blade 2 will generate lift and drag, and these two forces are in the circumferential direction of the entire wind rotor structure. The resultant force drives the entire wind wheel structure to rotate around the main shaft 3 at an angular velocity of ω, and then drives the rotor of the generator through the motor end connecting shaft 13 to achieve the purpose of generating electricity. At the same time, the overall structure of the wind rotor in this embodiment presents a trapezoidal structure with a small top and a large bottom, so as to achieve the torque M ₂ =F _t2 × the torque generated by the tangential force F _t2 at the upper end of the wind rotor structure to the main shaft 3 under a specific wind speed The torque M ₁ =F _t1 ×R ₁ generated by R ₂ and the tangential force F _t1 at the lower end of the device to the main shaft 3 is as equal as possible to avoid the unbalanced force on the rotor along the height direction, and at the same time to achieve stall control of the fixed blade. At the same time, the blade bottom end support 9 and the blade top end support 6 are in the shape of end plates, and the surface shapes are both airfoil shapes, and the area is larger than the corresponding blade end area, so as to reduce the blade tip loss and improve the wind speed. The purpose of the wind energy utilization rate of the wheel structure.

It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The utility model. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes which come within the meaning and range of equivalents of the claims are intended to be embraced within the present invention, and any reference signs in the claims shall not be construed as limiting the involved claim.

Specific examples are used in the present invention to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; at the same time, for those skilled in the art , according to the idea of the present utility model, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation on the present invention.

Claims (9)

1. A vertical axis wind turbine wind wheel structure based on horizontal axis wind turbine blade reuse is characterized in that: the novel blade is a middle effective section reserved after two ends of the blade of the original horizontal shaft wind turbine are cut; the novel blades are installed on the periphery of the main supporting part, and under the action of wind power, the main supporting part rotates to drive a rotor of the generator to rotate, so that the purpose of generating power is achieved.

2. The wind wheel structure of a vertical axis wind turbine according to claim 1, wherein: the middle effective section starts from the position of the maximum chord length of the wind turbine blade of the original horizontal shaft and ends at the section of 85 percent of the length of the wind turbine blade of the original horizontal shaft.

3. The wind wheel structure of a vertical axis wind turbine according to claim 1, wherein: each section of the new blade is in the shape of an airfoil.

4. The wind wheel structure of a vertical axis wind turbine according to claim 1, wherein: the main support part comprises a main shaft, an upper main support and a lower main support are respectively installed at the top end and the bottom end of the main shaft, and two ends of the new blade are respectively connected to the upper main support and the lower main support.

5. The wind wheel structure of a vertical axis wind turbine as claimed in claim 4, wherein: the upper main bracket comprises a blade top end part support and a plurality of connecting short rods with length regulators, and the connecting short rods are uniformly distributed on the periphery of the main shaft; one end of the connecting short rod is connected with the main shaft, the other end of the connecting short rod is connected with the blade top end part support, and the blade top end part support is used for being connected with the small end of the new blade.

6. The wind wheel structure of a vertical axis wind turbine as claimed in claim 5, wherein: the surface shape of the blade top end part support is in an airfoil shape, and the surface area of the blade top end part support is larger than the small end face area of the new blade.

7. The wind wheel structure of a vertical axis wind turbine as claimed in claim 4, wherein: the lower main bracket comprises a blade bottom end support and a plurality of long connecting rods with length regulators, and the long connecting rods are uniformly distributed on the periphery of the main shaft; one end of the long connecting rod is connected to the main shaft, the other end of the long connecting rod is connected to the blade bottom end support, and the blade bottom end support is used for being connected with the big head end of the new blade.

8. The wind wheel structure of a vertical axis wind turbine according to claim 7, wherein: the surface shape of the blade bottom end support is airfoil-shaped, and the surface area is larger than the area of the big end face of the new blade.

9. The wind wheel structure of a vertical axis wind turbine as claimed in claim 4, wherein: the main support component further comprises a secondary support; the auxiliary support comprises a plurality of inhaul cables, the inhaul cables are uniformly distributed on the periphery of the main shaft, one end of each inhaul cable is connected to the main shaft, and the other end of each inhaul cable is connected to the middle of the new blade through an anti-skid lock.

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