A small wind turbine blade mounting device

Abstract

This utility model provides a small wind turbine blade mounting device, including a mounting base, a connecting base, a sliding column, and a spring. The mounting base is fixed on the hub disk; the extended end of the mounting base has a first flange surface; the mounting base has a first sliding cavity, the opening of which is located on the first flange surface; one end of the connecting base has a second flange surface adapted to the first flange surface, and the other end is fixedly connected to the wind turbine blade; the sliding column is disposed on the connecting base and has an end extending outward from the second flange surface, the extended end of which is used to extend into the first sliding cavity; the spring is disposed in the first sliding cavity, one end of which is connected to the side wall of the first sliding cavity, and the other end is connected to the extended end of the sliding column, so that the sliding column has a tendency to continuously slide into the first sliding cavity. The small wind turbine blade mounting device provided by this utility model aims to solve the problem of poor safety caused by loosening of the wind turbine blade installation in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, specifically relating to a small wind turbine blade mounting device. Background Technology

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current. A wind turbine typically consists of components such as blades, a hub, a generator, a deflector, a tower, a speed-limiting safety mechanism, and an energy storage device.

[0003] In existing technology, wind turbines have multiple blades, and each blade is connected to an extension arm on the hub via a flange and bolts. During operation, the blades generate minute vibrations. Furthermore, after a period of use, the bolts tend to loosen, leading to blade vibration, fatigue, and accelerated damage. This poses a safety hazard and reduces practicality. Utility Model Content

[0004] This utility model provides a small wind turbine blade installation device, which aims to solve the problem of poor safety caused by loosening of the blade installation in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a small wind turbine blade mounting device, comprising: Mounting seat, fixed on the wheel hub disc; the extended end of the mounting seat has a first flange face; the mounting seat has a first sliding cavity, the opening of the first sliding cavity being located on the first flange face; The connecting seat has a second flange face at one end that is adapted to the first flange face, and a fan blade is fixedly connected to the other end. A sliding column, disposed on the connecting seat, has an end extending outward on the second flange surface, the extended end of the sliding column being used to extend into the first sliding cavity; A spring is disposed in the first sliding cavity. One end of the spring is connected to the side wall of the first sliding cavity, and the other end is connected to the protruding end of the sliding column, so that the sliding column has a tendency to continuously slide into the first sliding cavity.

[0006] In one possible implementation, the small wind turbine blade mounting device further includes a locking element that is detachably connected to the mounting base and the sliding column.

[0007] In one possible implementation, the locking element includes: The locking bolt is inserted into the mounting base and the sliding column; A nut, adapted to the locking bolt, is used to fix the locking bolt to the mounting base; The mounting base has a through first hole, and the sliding column has a through second hole. The diameter of the first hole or the second hole is larger than the diameter of the locking bolt.

[0008] In one possible implementation, the connecting seat is provided with a second sliding cavity, and the sliding column extends into the second sliding cavity.

[0009] In one possible implementation, the small wind turbine blade mounting device further includes a fixing pin for locking and fixing the connecting seat and the sliding column. The connecting seat has a through first mounting hole, and the sliding column has a through second mounting hole. Both the first mounting hole and the second mounting hole are adapted to the fixing pin.

[0010] In one possible implementation, the retaining pin includes: The pin body is inserted into the first mounting hole and the second mounting hole, and the pin body extends out of the first mounting hole; A retaining ring is fixedly connected to the end of the pin body that extends out of the first mounting hole, and is used to fix the pin body.

[0011] In one possible implementation, the sliding column is a prism structure.

[0012] In one possible implementation, the first flange surface is provided with a plurality of third mounting holes spaced annularly around the axis of the mounting base, and the second flange surface is provided with a plurality of fourth mounting holes spaced annularly around the axis of the connecting base, with each of the third mounting holes corresponding to each of the fourth mounting holes.

[0013] The beneficial effects of the small wind turbine blade mounting device provided by this utility model are as follows: Compared with the prior art, a first sliding cavity is provided on the mounting base. The first sliding cavity has an opening located on the first flange surface. A sliding column is set on the connecting seat, and the sliding column has an end extending outward on the second flange surface. The extended end of the sliding column is used to extend into the first sliding cavity, thereby initially connecting the mounting base and the connecting seat through the sliding column. The mounting base is fixed on the hub disk, and the other end of the connecting seat is fixedly connected to the wind blade. The extended end of the mounting base has a first flange surface, and one end of the connecting seat has a second flange surface, which is adapted to the first flange surface. Thus, the hub disk and the wind blade are connected through the mounting base and the connecting seat. A spring is provided in the first sliding cavity. One end of the spring is connected to the side wall of the first sliding cavity, and the other end is connected to the extended end of the sliding column, so that the sliding column has a tendency to continuously slide into the first sliding cavity. The sliding column is set on the connecting seat, and the extended end of the sliding column is used to extend into the first sliding cavity of the mounting base, thereby improving the stability of the connection between the mounting base and the connecting seat. Furthermore, during the operation of the wind turbine, the vibration potential energy generated by the blades is converted into the elastic potential energy of the springs, ensuring the stability of the blade rotation and extending the service life of the blades, thus improving safety. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of a small wind turbine blade mounting device provided for an embodiment of this utility model; Figure 2 A schematic diagram of the structure of a small wind turbine blade mounting device provided in this utility model embodiment; Figure 3 A schematic diagram of a second embodiment of a small wind turbine blade mounting device provided by this utility model; Figure 4 A schematic diagram of the structure of a small wind turbine provided for an embodiment of this utility model; Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0015] Explanation of reference numerals in the attached figures: 10. Mounting base; 11. First sliding cavity; 12. First through hole; 20. Connecting base; 30. Sliding column; 31. Second through hole; 40. Spring; 50. Locking element; 51. Locking bolt; 52. Nut; 60. Fixing pin; 70. Fan blade; 80. Hub disc. Detailed Implementation

[0016] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0017] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0020] Please refer to the following: Figures 1 to 5This invention provides a small wind turbine blade mounting device. The device includes a mounting base 10, a connecting base 20, a sliding column 30, and a spring 40. The mounting base 10 is fixed to a hub disc 80. The extended end of the mounting base 10 has a first flange surface. The mounting base 10 has a first sliding cavity 11, the opening of which is located on the first flange surface. One end of the connecting base 20 has a second flange surface adapted to the first flange surface, and the other end is fixedly connected to the wind turbine blade 70. The sliding column 30 is disposed on the connecting base 20, and has an end extending outward from the second flange surface. The extended end of the sliding column 30 is used to extend into the first sliding cavity 11. The spring 40 is disposed in the first sliding cavity 11, one end of which is connected to the side wall of the first sliding cavity 11, and the other end abuts against the extended end of the sliding column 30, giving the sliding column 30 a tendency to continuously slide into the first sliding cavity 11.

[0021] In this embodiment, the mounting base 10 is fixedly mounted on the hub disc 80, and the other end of the connecting base 20 is fixedly connected to the fan blade 70. The extended end of the mounting base 10 has a first flange surface, and one end of the connecting base 20 has a second flange surface. The second flange surface is adapted to the first flange surface, thereby connecting the hub disc 80 and the fan blade 70 through the mounting base 10 and the connecting base 20. The mounting base 10 has a first sliding cavity 11 with an opening located on the first flange surface. A sliding column 30 is mounted on the connecting base 20, and the sliding column 30 has an end extending outward on the second flange surface, the extended end of which is used to extend into the first sliding cavity 11. A spring 40 is provided in the first sliding cavity 11, one end of which is connected to the side wall of the first sliding cavity 11, and the other end is connected to the extended end of the sliding column 30, giving the sliding column 30 a tendency to continuously slide into the first sliding cavity 11.

[0022] This utility model provides a small wind turbine blade mounting device. Compared with the prior art, the mounting base 10 is provided with a first sliding cavity 11. The first sliding cavity 11 has an opening located on the first flange surface. A sliding column 30 is provided on the connecting seat 20, and the sliding column 30 has an end extending outward on the second flange surface. The extended end of the sliding column 30 is used to extend into the first sliding cavity 11, thereby initially connecting the mounting base 10 and the connecting seat 20 through the sliding column 30. Mounting seat 10 is fixedly mounted on hub disc 80, and connecting seat 20 is fixedly connected to wind blade 70 at the other end. Mounting seat 10 has a first flange surface at its extended end, and connecting seat 20 has a second flange surface at one end, which is adapted to the first flange surface. Thus, hub disc 80 and wind blade 70 are connected via mounting seat 10 and connecting seat 20. A spring 40 is provided in the first sliding cavity 11, with one end connected to the side wall of the first sliding cavity 11 and the other end connected to the protruding end of sliding column 30. This gives sliding column 30 a tendency to continuously slide into the first sliding cavity 11. Sliding column 30 is mounted on connecting seat 20, and its protruding end extends into the first sliding cavity 11 of mounting seat 10, thereby improving the stability of the connection between mounting seat 10 and connecting seat 20. Furthermore, during wind turbine operation, the vibration potential energy generated by wind blade 70 is converted into the elastic potential energy of spring 40, ensuring the stability of wind blade 70 rotation and extending its service life, thus improving safety.

[0023] It should be noted that although the vibration amplitude of the fan blade 70 increases after the bolts are loosened, the amplitude is still relatively small. At this time, the protruding end of the sliding column 30 is still inserted in the first sliding cavity 11, and the other end of the spring 40 is connected to the protruding end of the sliding column 30. This can convert part (or all) of the vibration potential energy of the fan blade 70 into the elastic potential energy of the spring 40, thereby reducing the vibration of the fan blade 70, improving safety, reducing the damage rate of the fan blade 70, and ensuring the service life of the fan blade 70.

[0024] Specifically, the spring 40 is always in a stretched state and has a tendency to return to its natural state, so the sliding column 30 always has a tendency to move closer to the spring 40, that is, a tendency to continuously slide into the first sliding cavity 11.

[0025] Example 1: In some embodiments, please refer to Figure 2 The small wind turbine blade mounting device provided in this embodiment of the utility model also includes a locking member 50, which is detachably connected to the mounting base 10 and the sliding column 30. In this embodiment, the locking member 50 further connects and fixes the mounting base 10 and the sliding column 30, thereby improving the connection stability between the sliding column 30 and the mounting base 10.

[0026] In some embodiments, please refer to Figure 2The locking component 50 includes a locking bolt 51 and a nut 52. The locking bolt 51 is inserted into the mounting base 10 and the sliding column 30. The nut 52 is adapted to the locking bolt 51 and is used to fix the locking bolt 51 to the mounting base 10. The mounting base 10 has a through hole 12, and the sliding column 30 has a through hole 31. The diameter of either the first through hole 12 or the second through hole 31 is larger than the diameter of the locking bolt 51. In this embodiment, the mounting base 10 has a through hole 12, the sliding column 30 has a through hole 31, and the locking bolt 51 is inserted into the mounting base 10 and the sliding column 30, i.e., the locking bolt 51 is inserted into the first through hole 12 and the second through hole 31. Nut 52 is adapted to lock bolt 51 and is used to fix lock bolt 51 on mounting base 10. Thus, when lock bolt 51 is inserted into the first through hole 12 and the second through hole 31, lock bolt 51 is limited on mounting base 10 by nut 52. The diameter of the first through hole 12 or the second through hole 31 is larger than the diameter of lock bolt 51, so that sliding column 30 can generate displacement along the length direction of the first sliding cavity 11, thereby facilitating the transfer of vibration potential energy of fan blade 70 to spring 40 through sliding column 30, and converting it into elastic potential energy of spring 40.

[0027] In some embodiments, the sliding column 30 is a prism structure.

[0028] Furthermore, the first sliding cavity 11 is a prismatic cavity adapted to the sliding post 30, so as to facilitate the insertion of the sliding post 30 into the first sliding cavity 11.

[0029] In some embodiments, a plurality of third mounting holes are provided on the first flange surface, spaced annularly around the axis of the mounting base 10, and a plurality of fourth mounting holes are provided on the second flange surface, spaced annularly around the axis of the connecting base 20, with each third mounting hole corresponding to one of the fourth mounting holes. In this embodiment, the first flange surface has a plurality of third mounting holes, spaced annularly around the axis of the mounting base 10. The second flange surface has a plurality of fourth mounting holes, spaced annularly around the axis of the connecting base 20, with each third mounting hole corresponding to one of the fourth mounting holes, thereby facilitating the connection and fixation of the mounting base 10 and the connecting base 20 by bolts. Specifically, the axis of the mounting base 10 coincides with the axis of the connecting base 20.

[0030] Example 2 In some embodiments, please refer to Figure 3 The small wind turbine blade mounting device provided in this embodiment of the utility model also includes a locking member 50, which is detachably connected to the mounting base 10 and the sliding column 30. In this embodiment, the locking member 50 further connects and fixes the mounting base 10 and the sliding column 30, thereby improving the connection stability between the sliding column 30 and the mounting base 10.

[0031] In some embodiments, please refer to Figure 3 The locking component 50 includes a locking bolt 51 and a nut 52. The locking bolt 51 is inserted into the mounting base 10 and the sliding column 30. The nut 52 is adapted to the locking bolt 51 and is used to fix the locking bolt 51 to the mounting base 10. The mounting base 10 has a through hole 12, and the sliding column 30 has a through hole 31. The diameter of either the first through hole 12 or the second through hole 31 is larger than the diameter of the locking bolt 51. In this embodiment, the mounting base 10 has a through hole 12, the sliding column 30 has a through hole 31, and the locking bolt 51 is inserted into the mounting base 10 and the sliding column 30, i.e., the locking bolt 51 is inserted into the first through hole 12 and the second through hole 31. Nut 52 is adapted to lock bolt 51 and is used to fix lock bolt 51 on mounting base 10. Thus, when lock bolt 51 is inserted into the first through hole 12 and the second through hole 31, lock bolt 51 is limited on mounting base 10 by nut 52. The diameter of the first through hole 12 or the second through hole 31 is larger than the diameter of lock bolt 51, so that sliding column 30 can generate displacement along the length direction of the first sliding cavity 11, thereby facilitating the transfer of vibration potential energy of fan blade 70 to spring 40 through sliding column 30, and converting it into elastic potential energy of spring 40.

[0032] In some embodiments, please refer to Figure 3 The connecting seat 20 is provided with a second sliding cavity, and the sliding column 30 extends into the second sliding cavity, thereby ensuring the stability of the connection between the sliding column 30 and the connecting seat 20.

[0033] In some embodiments, please refer to Figure 3 The small wind turbine blade mounting device provided in this embodiment of the utility model also includes a fixing pin 60. The fixing pin 60 is used to lock and fix the connecting seat 20 and the sliding column 30. The connecting seat 20 has a through first mounting hole, and the sliding column 30 has a through second mounting hole. Both the first and second mounting holes are adapted to the fixing pin 60. In this embodiment, the connecting seat 20 has a through first mounting hole, and the sliding column 30 has a through second mounting hole. Both the first and second mounting holes are adapted to the fixing pin 60, thereby locking and fixing the connecting seat 20 and the sliding column 30 together using the fixing pin 60.

[0034] In some embodiments, please refer to Figure 3The fixing pin 60 includes a pin body and a fixing ring. The pin body is inserted into the first mounting hole and the second mounting hole, and the pin body extends out of the first mounting hole. The fixing ring is fixedly connected to the end of the pin body extending out of the first mounting hole to fix the pin body. In this embodiment, the pin body is inserted into the first mounting hole and the second mounting hole, and the pin body extends out of the first mounting hole. The fixing ring is fixedly connected to the end of the pin body extending out of the first mounting hole, thereby fixing the pin body by the fixing ring to connect and fix the slide column 30 and the connecting seat 20 together.

[0035] In some embodiments, the sliding column 30 is a prism structure.

[0036] Furthermore, the first sliding cavity 11 and the second sliding cavity are prismatic cavities adapted to the sliding column 30, so as to facilitate the insertion of the sliding column 30 into the first sliding cavity 11 and the second sliding cavity.

[0037] In some embodiments, a plurality of third mounting holes are provided on the first flange surface, spaced annularly around the axis of the mounting base 10, and a plurality of fourth mounting holes are provided on the second flange surface, spaced annularly around the axis of the connecting base 20, with each third mounting hole corresponding to one of the fourth mounting holes. In this embodiment, the first flange surface has a plurality of third mounting holes, spaced annularly around the axis of the mounting base 10. The second flange surface has a plurality of fourth mounting holes, spaced annularly around the axis of the connecting base 20, with each third mounting hole corresponding to one of the fourth mounting holes, thereby facilitating the connection and fixation of the mounting base 10 and the connecting base 20 by bolts. Specifically, the axis of the mounting base 10 coincides with the axis of the connecting base 20.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small wind turbine blade mounting device, characterized in that, include: Mounting bracket, fixed on the wheel hub disc; The extended end of the mounting base has a first flange face; The mounting base has a first sliding cavity, the opening of which is located on the first flange surface; The connecting seat has a second flange face at one end that is adapted to the first flange face, and a fan blade is fixedly connected to the other end. A sliding column, disposed on the connecting seat, has an end extending outward on the second flange surface, the extended end of the sliding column being used to extend into the first sliding cavity; A spring is disposed in the first sliding cavity. One end of the spring is connected to the side wall of the first sliding cavity, and the other end is connected to the protruding end of the sliding column, so that the sliding column has a tendency to continuously slide into the first sliding cavity.

2. The small wind turbine blade mounting device as described in claim 1, characterized in that, The small wind turbine blade mounting device also includes a locking component, which is detachably connected to the mounting base and the sliding column.

3. The small wind turbine blade mounting device as described in claim 2, characterized in that, The locking element includes: The locking bolt is inserted into the mounting base and the sliding column; A nut, adapted to the locking bolt, is used to fix the locking bolt to the mounting base; The mounting base has a through first hole, and the sliding column has a through second hole. The diameter of the first hole or the second hole is larger than the diameter of the locking bolt.

4. The small wind turbine blade mounting device as described in claim 2, characterized in that, The connecting seat is provided with a second sliding cavity, and the sliding column extends into the second sliding cavity.

5. The small wind turbine blade mounting device as described in claim 4, characterized in that, The small wind turbine blade mounting device also includes a fixing pin, which is used to lock and fix the connecting seat and the sliding column. The connecting seat has a through first mounting hole, and the sliding column has a through second mounting hole. Both the first mounting hole and the second mounting hole are adapted to the fixing pin.

6. The small wind turbine blade mounting device as described in claim 5, characterized in that, The fixing pin includes: The pin body is inserted into the first mounting hole and the second mounting hole, and the pin body extends out of the first mounting hole; A retaining ring is fixedly connected to the end of the pin body that extends out of the first mounting hole, and is used to fix the pin body.

7. The small wind turbine blade mounting device as described in claim 2, characterized in that, The sliding column has a prism structure.

8. The small wind turbine blade mounting device as described in claim 2, characterized in that, The first flange surface is provided with a plurality of third mounting holes spaced annularly around the axis of the mounting base, and the second flange surface is provided with a plurality of fourth mounting holes spaced annularly around the axis of the connecting base, with each third mounting hole corresponding to each fourth mounting hole.

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