A fan blade extension structure with winglets

Abstract

The present invention discloses a fan blade extension structure provided with a winglet, comprising a fan blade body and a winglet body, wherein a positioning slot is provided on the tail end face of the fan blade body, and a positioning block is fixedly installed on the winglet body. The present invention relates to the field of wind power generation technology, wherein a rotating fixed block is provided on the pushing assembly. The invention drives the pushing block to move horizontally through a moving assembly, drives the half gear to rotate through an active gear block, and rotates the rotating fixed block on the half gear to the inside of a stable fixed groove, and then utilizes an extruded airbag in a stable assembly to increase the contact surface between the rotating fixed block and the stable fixed groove, and when the pushing block moves, it drives the fastening screw to enter the fastening screw hole through a bearing, so that the fastening screw is locked in the stable fixed groove. This method not only improves the firmness and stability between the winglet body and the fan blade body, but also improves the efficiency and output power of the fan blade body.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a wind turbine blade extension structure provided with winglets. Background Art

[0002] Wind power generation refers to a method of generating electricity by using wind to drive the wind wheel or blades to rotate mechanically, and then drive the generator to generate electricity through mechanical power transmission. Wind power generation is a kind of renewable energy, which has the advantages of being environmentally friendly, clean and pollution-free. In order to improve the power generation efficiency of the unit, extension sections are usually bonded to the original blades to extend the blades. The blade extension improves the wind turbine's ability to capture wind energy and thus improves its power generation efficiency.

[0003] In the prior art, a Chinese patent with publication number "CN118188293A" discloses a fan blade extension structure provided with winglets. By combining a traditional blade extension section with a winglet, at least two winglets are arranged at the end of the extension section. While improving the wind-catching ability of the blade, the adverse effects of the wingtip vortex can be effectively reduced, thereby effectively improving the power generation efficiency of the fan. A web is passed through the extension section and the winglet, which is not easy to deform and has good durability. The chord length of the winglet is designed by an elliptical equation, so that the chord length is quickly and smoothly from the extension section to the winglet section within a small range, thereby solving the problem that the existing method of bonding the extension section has a limited effect on improving the power generation efficiency.

[0004] During the operation of existing wind turbines, the vortex intensity at the blade tip position is the largest due to the strong rolling effect of the airflow in the blade tip area. The existence of the vortex system changes the effective speed direction at the blade tip position, thereby forming an induced drag. In the scheme described above, this phenomenon is avoided by providing two winglets on the blade extension section. Since the winglets and the fan blades in this scheme are in a state that cannot be disassembled, it is impossible to adjust and optimize them according to different fan blade designs and application scenarios, and when the winglets are damaged, they cannot be disassembled and replaced on the fan blades. Therefore, the present invention proposes a fan blade extension structure provided with winglets to solve the above-mentioned problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fan blade extension structure provided with winglets, which solves the problem that the existing winglets cannot be adjusted and optimized according to different fan blade designs and application scenarios.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A fan blade extension structure with a winglet, comprising a fan blade body and a winglet body, wherein a positioning slot is provided on the tail end surface of the fan blade body, a positioning block is fixedly mounted on the winglet body, and the positioning block is inlaid with the positioning slot;

[0008] The positioning card block is provided with a pushing component, the pushing component is provided with a rotating fixed block, and the interior of the positioning card slot is provided with a stable fixing slot;

[0009] The rotating fixed block is provided with a stabilizing component, and the stabilizing component is used to improve the firmness between the rotating fixed block and the stabilizing fixing groove.

[0010] Preferably, the pushing assembly includes an electric push rod and a pushing groove, the electric push rod is fixedly mounted on the positioning block, the pushing groove is arranged inside the positioning block, the output end of the electric push rod is fixedly connected to a telescopic rod, the end of the telescopic rod away from the electric push rod is fixedly connected to a pushing block, and the upper end surface and the lower end surface of the pushing block are fixedly connected to active gear blocks.

[0011] Preferably, the inner top and the inner bottom of the pushing groove are both provided with through grooves, the interior of the through groove is rotatably connected to a rotating shaft, a half gear is fixedly connected to the rotating shaft, the rotating fixed block is fixedly mounted on the half gear, and the half gear is meshed with the active gear block.

[0012] Preferably, a side end surface of the pushing block is fixedly connected to a limiting sliding block, an inner side surface of the pushing groove is provided with a limiting sliding groove, and the limiting sliding block is slidably connected to the limiting sliding groove.

[0013] Preferably, the stabilizing component includes an extrusion cylinder and a mounting groove, the extrusion cylinder is fixedly mounted inside the limiting slide groove, a push rod is movably connected to the extrusion cylinder, one end of the push rod away from the extrusion cylinder is fixedly connected to the limiting slide block, and a connecting component is provided at the air outlet of the extrusion cylinder.

[0014] Preferably, the connecting assembly includes an air outlet pipe, one end of which is fixedly connected to the air outlet of the extrusion cylinder, the other end of which is fixedly connected to an extension pipe, and one end of the extension pipe away from the air outlet pipe is fixedly connected to a telescopic hose.

[0015] Preferably, the mounting groove is arranged on the upper end surface of the rotating fixed block, an extrusion airbag is arranged inside the mounting groove, an air intake pipe is fixedly connected to the extrusion airbag, and one end of the air intake pipe away from the extrusion airbag is connected to the telescopic hose.

[0016] Preferably, a bearing is fixedly mounted on the end surface of the pushing block, and a fastening screw is fixedly connected inside the bearing.

[0017] Preferably, a through hole is formed on the inner side surface of the pushing groove, and the diameter of the through hole is larger than the outer diameter of the fastening screw.

[0018] Preferably, a fastening screw hole is formed on the inner side surface of the positioning slot, the fastening screw passes through the through hole and extends to the inside of the fastening screw hole, and the fastening screw is threadedly connected to the fastening screw hole.

[0019] Beneficial Effects

[0020] The present invention provides a fan blade extension structure provided with a winglet. Compared with the prior art, it has the following beneficial effects:

[0021] 1. The present invention inserts the positioning block on the winglet body into the positioning slot of the fan blade body, and then uses the electric push rod in the pushing assembly to drive the pushing block to move. The pushing block will slide in the limiting slot through the limiting slider and be in a horizontal moving state. The active tooth block on the pushing block is engaged with the half gear, and the rotating fixed block on the half gear will rotate through the rotating shaft. After the rotation, the rotating fixed block will be stuck in the stable fixing slot of the fan blade body. This method not only ensures the firmness and stability between the winglet body and the fan blade body, but also facilitates the disassembly and assembly of the winglet body.

[0022] 2. In the present invention, when the limit slider slides within the limit slide groove, the limit slider drives the piston on the push rod to move inside the extrusion cylinder, and the gas in the extrusion cylinder enters the extension tube through the outlet pipe, and the gas in the extension tube enters the extrusion airbag through the telescopic hose and the inlet pipe, and the extrusion airbag between the rotating fixed block and the stable fixed groove bulges, and the bulging extrusion airbag increases the contact surface between the rotating fixed block and the stable fixed groove, and at the same time improves the firmness between the winglet body and the fan blade body;

[0023] 3. In the present invention, when the pushing block moves horizontally, the fastening screw installed by the bearing will pass through the through hole and enter the fastening screw hole. Through the continuous movement of the pushing block, the fastening screw in the fastening screw hole will be in a rotating state due to the action of the bearing. When the rotating block completes the rotation and is in the stable fixing groove, the fastening screw will be locked in the stable fixing groove, so that the rotating block between the winglet body and the fan blade body is maintained in the correct position, further improving the firmness between the winglet body and the fan blade body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 It is a schematic diagram of the structure of the positioning card block and the positioning card slot in the present invention;

[0026] Figure 3 A partial cross-sectional view of a fan blade body in the present invention;

[0027] Figure 4 A partial cross-sectional view of the winglet body in the present invention Figure 1 ;

[0028] Figure 5 A partial cross-sectional view of the winglet body in the present invention Figure 2 ;

[0029] Figure 6 It is a schematic structural diagram of the winglet body in the present invention;

[0030] Figure 7 It is a cross-sectional view of the push block in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the driving component in the present invention;

[0032] Fig. 9 It is a cross-sectional view of the rotating stator in the present invention.

[0033] In the figure: 1. fan blade body; 2. winglet body; 3. positioning slot; 4. positioning block; 5. rotating block; 6. stabilizing slot; 7. electric push rod; 8. pushing slot; 9. telescopic rod; 10. pushing block; 11. active gear block; 12. through slot; 13. rotating shaft; 14. half gear; 15. limiting slider; 16. limiting slide slot; 17. extrusion cylinder; 18. mounting slot; 19. pushing rod; 20. outlet pipe; 21. extension pipe; 22. telescopic hose; 23. extrusion airbag; 24. inlet pipe; 25. bearing; 26. fastening screw; 27. through hole; 28. fastening screw hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-9The present invention is a fan blade extension structure with a winglet, comprising a fan blade body 1 and a winglet body 2. A positioning slot 3 is provided on the tail end face of the fan blade body 1. A positioning block 4 is fixedly installed on the winglet body 2. The positioning block 4 and the winglet body 2 can be set as one body. The positioning block 4 is embedded in the positioning slot 3. A pushing component is provided on the positioning block 4. A rotating block 5 is provided on the pushing component. The end of the rotating block 5 can be set in an arc shape so that when the rotating block 5 rotates, the rotating block 5 is embedded in the stable fixing groove 6. A stable fixing groove 6 is provided inside the positioning slot 3. A stabilizing component is provided on the rotating block 5. The firmness between the rotating block 5 and the stable fixing groove 6 is improved by the stabilizing component.

[0037] The pushing assembly includes an electric push rod 7 and a pushing groove 8. The electric push rod 7 is fixedly mounted on the positioning block 4. A circular groove is provided on the winglet body 2. The electric push rod 7 is located inside the circular groove. The pushing groove 8 is arranged inside the positioning block 4. The power source of the electric push rod 7 can be installed inside the winglet body 2. The output end of the electric push rod 7 is fixedly connected with a telescopic rod 9. The end of the telescopic rod 9 away from the electric push rod 7 is fixedly connected with a pushing block 10. The position of the pushing block 10 is inside the pushing groove 8. The pushing block 10 is slidably connected to the pushing groove 8. The upper end surface and the lower end surface of the pushing block 10 are fixedly connected with active gears. Block 11, the inner top and the inner bottom of the pushing groove 8 are both provided with a through groove 12, the inner rotatable connection of the through groove 12 is provided with a rotating shaft 13, and the rotating shaft 13 is fixedly connected with a half gear 14, the rotating fixed block 5 is fixedly installed on the half gear 14, the half gear 14 is meshed with the active gear block 11, the side end face of the pushing block 10 is fixedly connected with a limiting slider 15, the inner side face of the pushing groove 8 is provided with a limiting slide groove 16, the limiting slider 15 is slidably connected with the limiting slide groove 16, the pushing groove 8 is communicated with the outside through the through groove 12, and the limiting slider 15 slides in the limiting slide groove 16 through the limiting slider 15 to ensure the stability of the pushing block 10 during horizontal movement.

[0038] In this embodiment, by inserting the positioning block 4 on the winglet body 2 into the positioning slot 3 of the fan blade body 1, and then using the electric push rod 7 in the pushing assembly to drive the pushing block 10 to move, the pushing block 10 will slide in the limiting slot 16 through the limiting slider 15, and will be in a horizontal movement state. The active tooth block 11 on the pushing block 10 will engage with the half gear 14, and the rotating fixed block 5 on the half gear 14 will rotate through the rotating shaft 13. After the rotation, the rotating fixed block 5 will be stuck in the stable fixing slot 6 of the fan blade body 1. This method not only ensures the firmness and stability between the winglet body 2 and the fan blade, but also facilitates the disassembly and assembly of the winglet body 2.

[0039] Embodiment 2:

[0040] See also Figure 1-9 On the basis of the first embodiment, the stabilizing component includes an extrusion cylinder 17 and a mounting groove 18. The extrusion cylinder 17 is fixedly installed inside the limiting slide groove 16. A push rod 19 is movably connected to the extrusion cylinder 17. One end of the push rod 19 away from the extrusion cylinder 17 is fixedly connected to the limiting slide block 15. The air outlet of the extrusion cylinder 17 is provided with a connecting component, and the connecting component includes an air outlet pipe 20. One end of the air outlet pipe 20 is fixedly connected to the air outlet of the extrusion cylinder 17. The other end of the air outlet pipe 20 is fixedly connected to an extension pipe 21. The end of the extension pipe 21 away from the air outlet pipe 20 is fixedly connected to a telescopic hose 22. The mounting groove 18 is provided on the upper end surface of the rotating fixed block 5. An extrusion airbag 23 is provided inside the mounting groove 18. The extrusion airbag 23 is fixedly connected to an air inlet Tube 24, the air inlet pipe 24 is connected to the telescopic hose 22 at one end away from the extrusion airbag 23, the internal structure of the extrusion cylinder 17 is the same as the internal structure of the air pump in the prior art, and the gas in the extrusion cylinder 17 and the gas in the extrusion airbag 23 can be circulated back and forth through the outlet pipe 20, the telescopic hose 22, the extension pipe 21 and the outlet pipe 20. In order to ensure that the extrusion airbag 23 does not bulge easily, a control valve can be set on the outlet pipe 20, the extension pipe 21 and one of the outlet pipes 20. Since the control valve is a technology well known to people in this field, it will not be described in detail here, and through the setting of the telescopic hose 22, it is ensured that when the positioning block 4 rotates, the extrusion airbag 23 on the positioning block 4 is easy to ventilate.

[0041] In this embodiment, when the limit slider 15 slides in the limit groove 16, the limit slider 15 will drive the piston on the push rod 19 to move inside the extrusion cylinder 17, and the gas in the extrusion cylinder 17 will enter the extension tube 21 through the outlet pipe 20. The gas in the extension tube 21 will enter the extrusion airbag 23 through the telescopic hose 22 and the inlet pipe 24. The extrusion airbag 23 between the rotating fixed block 5 and the stable fixed groove 6 will bulge. The bulged extrusion airbag 23 will increase the contact surface between the rotating fixed block 5 and the stable fixed groove 6, and at the same time improve the firmness between the winglet body 2 and the fan blade body 1.

[0042] Embodiment three:

[0043] See also Figure 1-9 On the basis of the first embodiment, a bearing 25 is fixedly installed on the end face of the pushing block 10, and a fastening screw 26 is fixedly connected inside the bearing 25. A through hole 27 is opened on the inner side face of the pushing groove 8, and the aperture of the through hole 27 is larger than the outer diameter of the fastening screw 26, so that the fastening screw 26 can pass through the through hole 27, ensuring that the fastening screw 26 does not contact the through hole 27, so as to avoid affecting the rotation of the fastening screw 26. A fastening screw hole 28 is opened on the inner side face of the positioning slot 3, and the fastening screw 26 passes through the through hole 27 and extends to the inside of the fastening screw hole 28, and the fastening screw 26 is threadedly connected to the fastening screw hole 28.

[0044] In this embodiment, when the pushing block 10 moves horizontally, the fastening screw 26 installed by the bearing 25 will pass through the through hole 27 and enter the fastening screw hole 28. Through the continuous movement of the pushing block 10, the fastening screw 26 in the fastening screw hole 28 will be in a rotating state due to the action of the bearing 25. When the rotating fixed block 5 completes the rotation and is in the stable fixing groove 6, the fastening screw 26 will be locked in the stable fixing groove 6, so that the rotating fixed block 5 between the winglet body 2 and the fan blade body 1 is maintained in the correct position, further improving the firmness between the winglet body 2 and the fan blade body 1.

[0045] Working principle:

[0046] When in use, the positioning block 4 on the winglet body 2 is inserted into the positioning slot 3 of the fan blade body 1, and then the electric push rod 7 is used to drive the push block 10 to move. The push block 10 will slide in the limiting slot 16 through the limiting slider 15 and be in a horizontal moving state. The active tooth block 11 on the push block 10 is engaged with the half gear 14, and the rotating block 5 on the half gear 14 will rotate through the rotating shaft 13. After the rotation, the rotating block 5 will be stuck in the stable fixing slot 6 of the fan blade body 1, completing the position positioning of the rotating block 5;

[0047] When the limit slider 15 slides within the limit slot 16, the limit slider 15 drives the piston on the push rod 19 to move inside the extrusion cylinder 17. The gas in the extrusion cylinder 17 enters the extension tube 21 through the outlet pipe 20 through the action of the piston. The gas in the extension tube 21 enters the extrusion airbag 23 through the telescopic hose 22 and the inlet pipe 24. The extrusion airbag 23 between the rotating fixed block 5 and the stable fixed groove 6 will swell. The swollen extrusion airbag 23 will increase the contact surface between the rotating fixed block 5 and the stable fixed groove 6.

[0048] When the pushing block 10 moves horizontally, the fastening screw 26 installed by the bearing 25 will pass through the through hole 27 and enter the fastening screw hole 28. Through the continuous movement of the pushing block 10, the fastening screw 26 in the fastening screw hole 28 will be in a rotating state due to the action of the bearing 25. When the rotating fixed block 5 completes the rotation and is in the stable fixing groove 6, the fastening screw 26 will be locked in the stable fixing groove 6, so that the rotating fixed block 5 between the winglet body 2 and the fan blade body 1 is maintained in the correct position, thereby improving the firmness between the winglet body 2 and the fan blade body 1.

[0049] The control method in this technical solution is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. In addition, this application is mainly used to protect mechanical devices, so this technical solution no longer explains the motor control method and circuit connection relationship in detail.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan blade extension structure provided with a winglet, comprising a fan blade body (1) and a winglet body (2), characterized in that: A positioning slot (3) is provided on the tail end surface of the fan blade body (1), a positioning block (4) is fixedly mounted on the winglet body (2), and the positioning block (4) is inlaid with the positioning slot (3); The positioning card block (4) is provided with a pushing component, and a rotating fixed block (5) is provided on the pushing component. A stable fixed groove (6) is provided inside the positioning card groove (3). The pushing component comprises an electric push rod (7) and a pushing groove (8). The output end of the electric push rod (7) is fixedly connected to a telescopic rod (9), and the end of the telescopic rod (9) away from the electric push rod (7) is fixedly connected to a pushing block (10). The upper end surface and the lower end surface of the pushing block (10) are both fixedly connected to an active tooth block (11). The inner top and the inner bottom of the pushing groove (8) are both provided with a through groove (12). The inner part of the through groove (12) is rotatably connected to a rotating shaft (13), and a half gear (14) is fixedly connected to the rotating shaft (13). The side end surface of the pushing block (10) is fixedly connected to a limiting slider (15), and the inner side surface of the pushing groove (8) is provided with a limiting slide groove (16). The rotating fixed block (5) is provided with a stabilizing component, and the stabilizing component is used to improve the firmness between the rotating fixed block (5) and the stabilizing fixed groove (6). The stabilizing component includes an extrusion cylinder (17) and a mounting groove (18). The extrusion cylinder (17) is movably connected with a push rod (19). The air outlet of the extrusion cylinder (17) is provided with a connecting component, and the connecting component includes an air outlet pipe (20). One end of the air outlet pipe (20) is fixedly connected to the air outlet of the extrusion cylinder (17), and the other end of the air outlet pipe (20) is fixedly connected to an extension pipe (21). One end of the extension pipe (21) away from the air outlet pipe (20) is fixedly connected to a telescopic hose (22). An extrusion airbag (23) is provided inside the mounting groove (18), and an air inlet pipe (24) is fixedly connected to the extrusion airbag (23). A bearing (25) is fixedly mounted on the end surface of the pushing block (10), a fastening screw (26) is fixedly connected inside the bearing (25), a through hole (27) is provided on the inner side surface of the pushing groove (8), the aperture of the through hole (27) is larger than the outer diameter of the fastening screw (26), a fastening screw hole (28) is provided on the inner side surface of the positioning slot (3), the fastening screw (26) passes through the through hole (27) and extends to the inside of the fastening screw hole (28), and the fastening screw (26) is threadedly connected to the fastening screw hole (28).

2. A fan blade extension structure with winglets according to claim 1, characterized in that: The electric push rod (7) is fixedly mounted on the positioning block (4), and the pushing groove (8) is arranged inside the positioning block (4).

3. A fan blade extension structure with winglets according to claim 2, characterized in that: The rotating fixed block (5) is fixedly mounted on a half gear (14), and the half gear (14) is meshed with the active gear block (11).

4. A fan blade extension structure with winglets according to claim 2, characterized in that: The limiting sliding block (15) is slidably connected to the limiting sliding groove (16).

5. A fan blade extension structure with winglets according to claim 4, characterized in that: The extrusion cylinder (17) is fixedly mounted inside the limiting slide groove (16), and one end of the push rod (19) away from the extrusion cylinder (17) is fixedly connected to the limiting slide block (15).

6. A fan blade extension structure with winglets according to claim 5, characterized in that: The mounting groove (18) is arranged on the upper end surface of the rotating fixed block (5), and one end of the air inlet pipe (24) away from the extrusion airbag (23) is in communication with the telescopic hose (22).

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