CN111692043A - Efficient wind scoop device of resistance type vertical axis wind turbine - Google Patents

Abstract

The invention specifically relates to a high-efficiency wind bucket device of a resistance type vertical axis wind turbine, comprising a main wind bucket 1, a damper 2, a torsion spring 3 and a connecting bolt 4; the front of the main wind bucket 1 is provided with three rows of double ears with equal spacing The plate 11 structure, the double lug plate 11 structure is punched with through holes; the front of the air door 2 is provided with two rows of single lug plate 21 structures, and the single lug plate 21 structure is punched with through holes; the main air bucket 1 and the air door 2 pass through the main air The double lug plate 11 structure on the bucket 1, the single lug plate 21 structure on the damper 2 are connected with the connecting bolt 4; the torsion spring 3 is installed on the front of the main air bucket 1 near the middle row of the double lug plate 11 structure through the connecting bolt 4 , the torsion arm of one end of the torsion spring 3 is arranged on the front of the main air bucket 1 , and the torsion arm of the other end is arranged on the front of the damper 2 . The present invention adopts elliptical arc to construct the profile of the air bucket device, and utilizes the arrangement of the main air bucket 1 and the air door 2 to reduce the useless resistance, increase the output, and improve the energy conversion efficiency of the device.

Description

A high-efficiency wind bucket device for a drag-type vertical axis wind turbine

technical field

The invention relates to the technical field of wind power generation, in particular to a high-efficiency wind bucket device of a resistance type vertical axis wind turbine.

Background technique

Wind energy is a clean and renewable energy, and its main utilization form is wind power generation. The vertical axis wind turbine has the advantages of no need to adjust the direction of the wind, low noise, easy installation and maintenance, and low manufacturing cost, and is more suitable for urban wind power generation. Vertical axis wind turbines can be divided into lift type and drag type according to different working methods.

At present, the known resistance type vertical axis wind turbines rely on the wind bucket to perform work, the starting torque is large and the structure is simple, but in contrast, the energy conversion efficiency of the existing resistance type vertical axis wind turbines is low, because: 1. The cross-section of the bucket is a simple flat plate, semi-circle, rectangle, etc. When the front of the bucket works to the windward position, the energy conversion between the bucket of these simple cross-sections and the incoming flow is not sufficient, resulting in no greater benefit. 2. When the back of the air bucket works to the windward position, because the projection of the air bucket perpendicular to the direction of the incoming flow is large, the windward area is large, resulting in a large unhelpful resistance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-efficiency wind bucket device for a resistance type vertical axis wind turbine.

The technical scheme of the present invention is: a high-efficiency wind bucket device for a resistance type vertical axis wind turbine, comprising a main wind bucket, a damper, a torsion spring and a connecting bolt; the concave surface of the main wind bucket is the front surface, the convex surface is the back surface, and the The front of the main air bucket is provided with three rows of double-ear plate structures with equal spacing, and through holes are punched on the double-ear plate structure; the concave surface of the air door is the front, the convex surface is the back, and the front of the air door is provided with two rows The single-ear plate structure is provided with through holes; the main air bucket and the air door are connected by connecting bolts using the double ear plate structure on the main air bucket and the single ear plate structure on the air door.

Further, the cross-sectional shape of the main air bucket is two symmetrical elliptical arcs, the tangent angle of the outer end of the elliptical arc is 90°, the tangent angle of the inner end is 0°, and the two ends of the main air bucket are provided with There are closed baffles to prevent air leakage at both ends of the main air bucket.

Further, the cross-sectional shape of the air door is an elliptical arc, the tangent angle of the end of the elliptical arc in contact with the main air bucket is 0°, the elliptic arc of the cross-sectional shape of the air door and the ellipse of the cross-sectional shape of the main air bucket. The arc comes from the same ellipse, and the combination of the two is a smooth and continuous ellipse arc.

Further, the through hole on the single-ear plate structure of the air door and the connecting bolt are in clearance fit to ensure that the air door can be normally rotated around the connecting bolt to open and close, and the opening and closing angle of the air door ranges from 0 to 90°.

Further, it also includes a torsion spring, the torsion spring is installed on a row of double ear plate structures in the middle of the front of the main wind bucket through connecting bolts, the torsion arm at one end of the torsion spring is arranged on the front of the main wind bucket, and the torsion arm at the other end is The torsion arm is arranged on the front of the damper to ensure the normal closing of the damper.

The beneficial effects of the present invention are:

1. The cross section of the air bucket device of the present invention adopts double elliptical arc lines, which can better capture the incoming flow, and guide the captured incoming flow to blow out from the opposite direction to the incoming flow, which increases the output of the vertical axis wind turbine and improves the performance of the wind turbine. energy conversion efficiency.

2. The cross section of the air bucket device of the present invention has a smaller aspect ratio. When the side of the air bucket device rotates to the direction of the incoming flow, on the one hand, the smaller thickness reduces the resistance of the incoming flow, on the other hand, the air bucket device The shape of the elliptical arc can help the incoming flow to flow more smoothly through the wind bucket, thereby reducing the unhelpful resistance and increasing the rotational torque of the vertical axis wind turbine.

3. The air door of the present invention can be opened and closed in the range of 0~90°. When the back of the air bucket device runs to the direction of the incoming flow, the air door is automatically opened under the resistance of the incoming flow, and a part of the incoming flow passes through the air bucket from the middle of the air door. , and other inflows flow smoothly to the downstream along the back of the main wind bucket, thereby reducing the useless resistance of the wind bucket, further improving the output of the vertical axis wind turbine, and increasing the energy conversion efficiency.

4. The flow passage of the flow passage part of the present invention is reasonable, the flow separation loss is small, the aerodynamic noise is reduced, and the noise of the vertical axis wind turbine is reduced.

5. The present invention is simple in structure, reliable in operation, and convenient for popularization and application.

Description of drawings

Fig. 1 is the assembly structure diagram of the embodiment of the present invention;

Fig. 2 is the sectional view of S-S of Fig. 1;

Fig. 3 is the structural diagram of the main air bucket of the embodiment of the present invention;

Fig. 4 is the structure diagram of the damper of the embodiment of the present invention;

FIG. 5 is a working schematic diagram of an embodiment of the present invention.

Description of drawings: 1- Main air bucket, 2- Air door, 3- Torsion spring, 4- Connecting bolt, 11- Double lug plate, 21- Single lug plate.

Detailed ways

As shown in Figures 1 to 5, the high-efficiency wind bucket device of the resistance-type vertical axis wind turbine includes a main wind bucket 1, a damper 2, a torsion spring 3 and a connecting bolt 4; the concave surface of the main wind bucket 1 is the front side, and the convex surface is the back side , the front of the main air bucket 1 is provided with three rows of double-ear plate 11 structures with equal spacing, and the double-ear plate 11 structure is punched with through holes; the concave surface of the air door 2 is the front, the convex surface is the back, and the front of the air door 2 is provided with two rows Single ear plate 21 structure, through holes are punched on the single ear plate 21 structure; the main air bucket 1 and the damper 2 pass through the double ear plate 11 structure on the main air bucket 1, the single ear plate 21 structure on the air door 2 and the connecting bolt 4 Connection; the torsion spring 3 is installed on the front of the main wind bucket 1 near the middle of a row of double lugs 11 through the connecting bolt 4, the torsion arm at one end of the torsion spring 3 is arranged on the front of the main wind bucket 1, and the torsion arm at the other end is arranged On the front side of the damper 2, a torsion spring 3 ensures the normal closing of the damper 2.

The cross-sectional shape of the main air bucket 1 is two symmetrical elliptical arcs. When the back of the air bucket device runs to the same direction as the incoming flow, the main air bucket 1 helps the incoming flow to flow from the two sides of the main air bucket 1 more smoothly. side flow, thereby reducing the unhelpful resistance and increasing the rotational torque of the vertical axis wind turbine.

The tangent angle of the outer end of the elliptical arc of the main air bucket 1 section is 90°, which can better capture the incoming flow, and the tangent angle of the inner end of the elliptical arc is 0°. Both ends of the main air bucket 1 are provided with closed baffles to prevent air leakage at both ends of the main air bucket 1 and improve the capture efficiency of wind energy.

The sectional shape of the damper 2 is an elliptical arc, and the tangent angle between the elliptic arc of the sectional shape of the damper 2 and the end of the main air bucket 1 is 0°, ensuring that the main air bucket 1 and the air door 2 are smooth and continuous at the connection.

The elliptical arc of the cross-sectional shape of the damper 2 and the elliptic arc of the cross-sectional shape of the main air bucket 1 come from the same ellipse, and the combination of the two is a smooth and continuous elliptical arc, which ensures that the air bucket device better captures the incoming flow and guides the capture. The incoming flow is blown out from the opposite direction to the incoming flow, which increases the output of the vertical axis wind turbine and improves the energy conversion efficiency of the device.

The through holes on the single lug plate 21 of the damper 2 are in clearance fit with the connecting bolts 4 . The distance between the lugs of the double lug plate 11 structure of the main air bucket 1 is 2-3 mm larger than the width of the single lug plate 21 of the damper 2 . It is ensured that the damper 2 can be normally rotated around the connecting bolt 4 to open and close.

The opening and closing angle range of the damper 2 is 0~90°. When the back of the air bucket device rotates to the direction of the incoming flow, the damper 2 opens automatically under the resistance of the incoming flow to ensure that part of the incoming flow passes through the air bucket from the middle of the damper 2. , reducing the unhelpful resistance of the incoming flow, increasing the output of the vertical axis wind turbine, and improving the energy conversion efficiency.

The working principle of the present invention is as follows: the air bucket device has four typical working positions, namely A, B, C, and D. When the air bucket device is working, it reciprocates from A→B→C→D→A in sequence. In the A working position, the damper 2 is closed under the action of the torsion spring 3, and the incoming flow flows smoothly around the two sides of the air bucket device to the downstream; under the action of the rotational torque, the air bucket device runs from the A working position to the B operation. At this time, the front of the main air bucket 1 and the damper 2 is the windward side, and the air bucket device captures the incoming flow and guides the captured incoming flow to blow out from the opposite direction to the incoming flow; then, the air bucket device acts on the rotation torque. Continue to run down to the C working position, and the incoming flow flows smoothly around the two sides of the air bucket device to the downstream; then, the air bucket device continues to run to the D working position. The damper 2 is opened under the action of the incoming flow resistance, part of the incoming flow passes through the air bucket device from the middle of the damper 2, and the other incoming flow flows smoothly to the downstream along the back of the main air bucket 2; finally, the air bucket device rotates under the torque Under the action of , it runs from the D working position to the A working position, forming a complete working closed loop.

Claims (7)

1. The utility model provides a high-efficient wind scoop device of resistance type vertical axis wind turbine which characterized in that: comprises a main air hopper (1), an air door (2), a torsion spring (3) and a connecting bolt (4);

the concave surface of the main air hopper (1) is a front surface, the convex surface of the main air hopper (1) is a back surface, three rows of double-lug plate (11) structures with equal intervals are arranged on the front surface of the main air hopper (1), and through holes are punched in the double-lug plate (11) structures; the concave surface of the air door (2) is a front surface, the convex surface of the air door is a back surface, two rows of single lug plate (21) structures are arranged on the front surface of the air door (2), and through holes are formed in the single lug plate (21) structures; the main air hopper (1) is connected with the air door (2) through a double-lug plate (11) structure on the main air hopper (1) and a single-lug plate (21) structure on the air door (2) and a connecting bolt (4);

torsion spring (3) are installed through connecting bolt (4) and are openly close to one row of two otic placodes (11) in the middle in main wind fill (1) structurally, the torque arm setting of torsion spring (3) one end is in the front of main wind fill (1), and the torque arm setting of the other end guarantees the normal closure of air door (2) in the front of air door (2).

2. The high-efficiency wind scoop device of the resistance type vertical axis wind turbine as claimed in claim 1, wherein: the cross section of the main air hopper (1) is in the shape of two bilaterally symmetrical elliptical arcs, the tangent angle of the outer end of each elliptical arc is 90 degrees, and the tangent angle of the inner end of each elliptical arc is 0 degree.

3. The high-efficiency wind scoop device of the resistance type vertical axis wind turbine as claimed in claim 2, wherein: and two ends of the main air hopper (1) are provided with closed baffles to prevent air leakage at two ends of the main air hopper (1).

4. The high-efficiency wind scoop device of the resistance type vertical axis wind turbine as claimed in claim 3, wherein: the cross-sectional shape of air door (2) is one section elliptical arc, the tangent line angle of the one end of elliptical arc and main wind scoop (1) contact is 0.

5. The high-efficiency wind scoop device of the resistance type vertical axis wind turbine as claimed in claim 4, wherein: the elliptic arc of the cross section of the air door (2) and the elliptic arc of the cross section of the main air hopper (1) are from the same ellipse, and the combination of the two is a smooth continuous elliptic arc.

6. The high-efficiency wind scoop device of the resistance type vertical axis wind turbine as claimed in claim 5, wherein: the through hole and the connecting bolt (4) on the structure of the single lug plate (21) of the air door (2) are in clearance fit, and the lug plate interval of the double lug plate (11) structure of the main air hopper (1) is 2-3 mm larger than the structure width of the single lug plate (21) of the air door (2).

7. The efficient wind scoop device of the drag type vertical axis wind turbine as claimed in claim 6, wherein: the range of the opening and closing angle of the air door (2) is 0-90 degrees.

Images