Fan variable pitch device

Abstract

The utility model provides a fan variable-pitch device, which relates to the technical field of wind power generation and comprises a fan shell, a rotary drum arranged on one side of the fan shell and a plurality of blades mounted on the outer circumference of the rotary drum, and a variable-pitch adjusting mechanism for driving the blades to rotate and adjust is arranged in the rotary drum. A connecting piece for rotationally connecting the rotary drum with the fan shell is arranged on the fan shell; a limiting structure for quickly positioning the connecting piece is also arranged on the rotary drum; compared with the prior art, through the arrangement of the limiting structure, the rotary drum and the connecting disc can be fixed in a joggling mode, so that rapid positioning between the rotary drum and the connecting disc is achieved, the rotary drum and the connecting disc can be conveniently installed and fixed through the fastening structure, and rapid assembly between the rotary drum and the connecting disc is facilitated; and the rotary drum and the connecting disc can be stably assembled, so that the wind power generation can be conveniently and stably carried out.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a wind turbine pitch control device. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. In wind power generation, existing wind turbine generator sets with speed-increasing tubes are commonly used to improve the energy density of wind, stabilize wind pulsation by guiding air through the tube, and adapt to low wind speed areas, thus broadening the applicable wind speed range of wind turbines. However, when the wind speed is high, the blade speed of the wind turbine is too fast. Therefore, existing wind turbines usually use pitch control devices to change the windward side of the wind turbine blades, thereby changing the utilization of wind energy and preventing the blades from rotating too fast and causing safety hazards.

[0003] There is an existing authorization notice number, CN 221482058 A Chinese patent disclosed by U discloses a wind turbine blade pitch control device. This device uses a motor to drive a connecting shaft assembly to rotate, which in turn drives a synchronous drive assembly, thereby rotating the blades to adjust their angle. The connecting shaft assembly allows for efficient use of the internal space of the turbine unit, achieving both control over blade rotation without interfering with the hub's operation of the generator set. The combination of a first rotating shaft, a connecting sleeve, and a second rotating shaft facilitates the connecting shaft assembly passing between the hub and the generator set's rotating shaft, with both ends connected to the drive motor and the synchronous drive assembly. The coaxial arrangement of the first rotating shaft and the drive shaft ensures that pitch control is achieved without affecting power generation. A sliding part drives the first, second, and third drive parts to move simultaneously, thereby rotating the blades. The motor drives the second rotating shaft to rotate, and the external thread and nut seat, in conjunction with the second rotating shaft, cause the nut seat to move the fixed sleeve and connecting plate. The movement of the connecting plate drives the drive shaft, which in turn drives the fixed shaft to rotate, thus rotating the blades. This consistent structure ensures a consistent rotation angle, resulting in more stable blade rotation. However, during the assembly of the aforementioned pitch control device, bolts or screws are generally used to fasten the blade drum to the wind turbine shaft. However, in actual assembly, the blade drum and the wind turbine shaft are prone to rotational misalignment. Therefore, workers need to rotate and fine-tune the blade drum and the wind turbine shaft, which is not conducive to the rapid assembly of the blade drum and the wind turbine shaft. Furthermore, if the fasteners are loose, the stable connection between the blade drum and the wind turbine shaft cannot be guaranteed, making it easy for the blade drum and the wind turbine shaft to wobble, posing a safety hazard and affecting the wind power generation process. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a wind turbine pitch control device.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A wind turbine pitch control device includes a wind turbine housing, a rotating drum disposed on one side of the wind turbine housing, and a plurality of blades mounted on the outer circumference of the rotating drum. The rotating drum is provided with a pitch adjustment mechanism for driving the plurality of blades to rotate and adjust. The wind turbine housing is provided with a connector for rotatably connecting the rotating drum to it, and one end of the connector can be inserted into the rotating drum. The rotating drum is provided with a fastening structure for fixing the connector to it.

[0007] The drum is also provided with a limiting structure for quickly positioning the connector, and the limiting structure includes a convex ring installed on the inner wall of the drum, the convex ring is provided with a plurality of tenon blocks, and the end of the connector inserted into the drum is provided with a tenon groove for the plurality of tenon blocks to be inserted.

[0008] Preferably, the connector includes a shaft rotatably mounted on one side of the fan housing, one end of the shaft being fixedly connected to a connecting plate, and the other end extending into the interior of the fan housing, with the tenon groove formed on the connecting plate.

[0009] Preferably, the outer wall of the tenon block and the inner wall of the tenon groove are provided with right-angled triangular slots on both sides. When the tenon block is inserted into the tenon groove, two adjacent slots can be spliced ​​to form a rectangular limiting groove. A limiting insert is detachably inserted into the limiting groove.

[0010] More preferably, the fastening structure includes multiple through holes on the outer circumference of the drum and multiple threaded holes on the outer circumference of the connecting plate. The multiple through holes correspond one-to-one with the multiple threaded holes, and each of the through holes is provided with a fastening bolt that is screwed into its corresponding threaded hole.

[0011] More preferably, the pitch adjustment mechanism includes multiple rotating shafts rotatably mounted on the outer circumference of the drum and a mounting plate mounted inside the drum. Multiple motors are fixedly connected to the mounting plate, and each motor corresponds to one of the multiple rotating shafts and is connected to a transmission component. The multiple blades are respectively mounted on one end of the rotating shafts.

[0012] Most preferably, the transmission component includes a main gear mounted on the motor spindle, one end of the rotating shaft extends into the drum and is fitted with a connecting shaft, and a secondary gear meshing with the main gear is mounted on the connecting shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. When this utility model is used, the limited structure allows for the tenon joint fixing of the drum and the connecting plate during installation between the drum and the wind turbine housing. This enables rapid positioning of the drum and the connecting plate, facilitating the fastening structure to secure the drum and the connecting plate and preventing misalignment during installation. It also avoids the need for multiple fine adjustments between the drum and the connecting plate, facilitating rapid assembly of the drum and the connecting plate and ensuring stable assembly. This guarantees efficient and stable operation of the device, preventing the blade drum and the wind turbine shaft from easily shaking and posing safety hazards, thus facilitating stable wind power generation.

[0015] 2. In use, this utility model, by setting a limiting insert and a limiting groove, allows the limiting insert to be inserted into the limiting groove when the tenon block is inserted into the tenon groove, thereby stably limiting the tenon block in the tenon groove. This achieves stable and rapid positioning between the connecting plate and the drum, further preventing the connecting plate and the drum from shifting during installation. This facilitates quick assembly and disassembly between the connecting plate and the drum, and is beneficial for the maintenance and repair of the pitch adjustment mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 A partial sectional view;

[0019] Figure 3 This is a schematic diagram of the blade structure;

[0020] Figure 4 for Figure 2 A structural diagram of the transfer drum from another angle;

[0021] Figure 5 for Figure 2 Enlarged view of point A in the image;

[0022] Figure 6 for Figure 3 Enlarged view of point B in the image;

[0023] Figure 7 for Figure 4 Enlarged view of point C in the image;

[0024] Figure 8 An exploded view of the rotating drum;

[0025] Figure 9 This is a structural diagram of the tenon joint block.

[0026] In the diagram: 1. Fan housing; 2. Drum; 3. Blade; 4. Fastening structure; 41. Fastening bolt; 42. Threaded hole; 43. Through hole; 5. Shaft; 6. Pitch adjustment mechanism; 61. Motor; 62. Main gear; 63. Secondary gear; 64. Connecting shaft; 7. Limiting structure; 71. Tenon block; 72. Limiting insert; 73. Tenon groove; 74. Limiting groove; 8. Connecting disc; 9. Raised ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figures 7-9 The wind turbine pitch control device shown includes a wind turbine housing 1, a rotating drum 2 located on one side of the wind turbine housing 1, and multiple blades 3 mounted on the outer circumference of the rotating drum 2. The rotating drum 2 is provided with a pitch adjustment mechanism 6 that drives the multiple blades 3 to rotate and adjust. The wind turbine housing 1 is provided with a connector that rotatably connects the rotating drum 2 to it, and one end of the connector can be inserted into the rotating drum 2. The rotating drum 2 is provided with a fastening structure 4 that fixes the connector to it.

[0029] The drum 2 is also provided with a limiting structure 7 for quick positioning of the connector, and the limiting structure 7 includes a protruding ring 9 installed on the inner wall of the drum 2. The protruding ring 9 is provided with a plurality of tenon blocks 71. One end of the connector inserted into the drum 2 is provided with a tenon groove 73 for the plurality of tenon blocks 71 to be inserted.

[0030] Specifically, regarding the aforementioned connectors, such as Figure 1 , Figure 2 and Figure 5 As shown, the connector includes a shaft 5 rotatably mounted on one side of the fan housing 1. One end of the shaft 5 is fixedly connected to a connecting plate 8, and the other end extends into the interior of the fan housing 1. A tenon groove 73 is formed on the connecting plate 8.

[0031] Specifically, regarding the aforementioned pitch adjustment mechanism 6, such as Figures 2-7As shown, the pitch adjustment mechanism 6 includes multiple rotating shafts rotatably mounted on the outer circumference of the drum 2, and a mounting plate installed inside the drum 2. Multiple motors 61 are fixedly connected to the mounting plate, and the multiple motors 61 correspond one-to-one with the multiple rotating shafts and are connected to transmission components. Multiple blades 3 are respectively installed at one end of the rotating shafts.

[0032] Furthermore, the transmission components include a main gear 62 mounted on the main shaft of the motor 61, one end of the rotating shaft extending into the drum 2 and mounted on a connecting shaft 64, and a secondary gear 63 meshing with the main gear 62 mounted on the connecting shaft 64.

[0033] As described above, during use, the wind turbine can be installed inside the wind turbine housing 1, and the shaft 5 can be connected to the wind turbine. Then, the drum 2 and the connecting plate 8 can be installed and fixed through the fastening structure 4, thus completing the assembly of the drum 2 and the wind turbine housing 1. When the blades 3 are driven by the wind to rotate the drum 2, the drum 2 drives the shaft 5 connected to the wind turbine to rotate through the connecting plate 8, and then generates electricity through the wind turbine.

[0034] Furthermore, during the wind power generation process, multiple motors 61 can drive the main gears 62 on their main shafts to rotate, which in turn drive the secondary gears 63 meshing with them to rotate. Subsequently, the secondary gears 63 drive the blades 3 to rotate through the connecting shaft 64, thereby adjusting the angle of the blades 3 and changing the windward surface to achieve full utilization of wind energy. This also prevents the blades from rotating too fast and causing safety hazards, ensuring the normal operation of the wind turbine.

[0035] Meanwhile, during installation between the drum 2 and the wind turbine casing 1, the drum 2 is fitted onto the connecting plate 8, allowing the connecting plate 8 to be inserted into the drum 2 and abut against the convex ring 9. At this time, the tenon block 71 on the convex ring 9 is inserted into the tenon groove 73 on the connecting plate 8 to fix the drum 2 and the connecting plate 8 with a tenon joint, thereby achieving rapid positioning between the drum 2 and the connecting plate 8. This facilitates the fastening structure 4 to install and fix the drum 2 and the connecting plate 8, avoiding the problem of the drum 2 and the connecting plate 8 shifting during installation and requiring multiple fine adjustments. This also facilitates rapid assembly between the drum 2 and the connecting plate 8 and enables stable assembly between them, ensuring efficient and stable operation of the device and facilitating stable wind power generation.

[0036] When maintaining the pitch adjustment mechanism 6, simply separate the drum 2 from the wind turbine housing 1 using the fastening structure 4. At this time, the tenon block 71 is removed from the tenon groove 73. Then, maintain and repair the pitch adjustment mechanism 6 inside the drum 2. This enables rapid maintenance of the pitch adjustment mechanism 6, ensures its normal use, and facilitates the adjustment of the windward side of the blade 3.

[0037] Specifically, regarding the aforementioned fastening structure 4, such as Figures 1-8 As shown, the fastening structure 4 includes multiple through holes 43 on the outer circumference of the drum 2 and multiple threaded holes 42 on the outer circumference of the connecting plate 8. The multiple through holes 43 correspond one-to-one with the multiple threaded holes 42, and each through hole 43 is provided with a fastening bolt 41 that is screwed into its corresponding threaded hole 42.

[0038] During the installation process between the drum 2 and the connecting plate 8, when the connecting plate 8 is inserted into the drum 2, the drum 2 can be rotated slightly to make the through hole 43 correspond to the screw hole 42. Then, the fastening bolt 41 is screwed into the screw hole 42 through the through hole 43 to fix the drum 2 and the connecting plate 8, thus completing the installation of the drum 2 and the connecting plate 8. When disassembling the drum 2 and the connecting plate 8, simply unscrew the fastening bolt 41 from the screw hole 42 and pull the drum 2 to one side to separate the drum 2 from the connecting plate 8, thus achieving the disassembly of the drum 2 and enabling quick assembly and disassembly between the drum 2 and the connecting plate 8.

[0039] Additionally, in this embodiment, as Figure 2 , Figure 4 , Figure 5 as well as Figures 7-9 As shown, both sides of the outer wall of the tenon block 71 and both sides of the inner wall of the tenon groove 73 are provided with right-angled triangular slots. When the tenon block 71 is inserted into the tenon groove 73, two adjacent slots can be spliced ​​to form a rectangular limiting groove 74. A limiting insert 72 is detachably inserted into the limiting groove 74.

[0040] When the tenon block 71 is inserted into the tenon groove 73, the limiting insert block 72 can be inserted into the limiting groove 74 formed between the tenon block 71 and the tenon groove 73 to stably limit the tenon block 71 in the tenon groove 73, thereby achieving stable and rapid positioning between the connecting plate 8 and the drum 2, further preventing the connecting plate 8 and the drum 2 from shifting during installation, so as to facilitate quick disassembly and assembly between the connecting plate 8 and the drum 2, and thus facilitating the maintenance and repair of the pitch adjustment mechanism 6.

[0041] 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, improvements, etc., 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 wind turbine pitch control device, characterized in that: The device includes a fan housing (1), a rotating drum (2) located on one side of the fan housing (1), and multiple blades (3) mounted on the outer circumference of the rotating drum (2). The rotating drum (2) is provided with a pitch adjustment mechanism (6) for driving the multiple blades (3) to rotate and adjust. The fan housing (1) is provided with a connector that rotatably connects the rotating drum (2) to it, and one end of the connector can be inserted into the rotating drum (2). The rotating drum (2) is provided with a fastening structure (4) for fixing the connector to it. The drum (2) is also provided with a limiting structure (7) for quickly positioning the connector, and the limiting structure (7) includes a protruding ring (9) installed on the inner wall of the drum (2), and a plurality of tenon blocks (71) are provided on the protruding ring (9). One end of the connector inserted into the drum (2) is provided with a tenon groove (73) for the plurality of tenon blocks (71) to be inserted.

2. The wind turbine pitch control device according to claim 1, characterized in that: The connector includes a shaft (5) rotatably mounted on one side of the fan housing (1), one end of which is fixedly connected to a connecting plate (8), and the other end extends into the interior of the fan housing (1). The tenon groove (73) is formed on the connecting plate (8).

3. The wind turbine pitch control device according to claim 1, characterized in that: The outer walls of the tenon block (71) and the inner walls of the tenon groove (73) are provided with right-angled triangular slots. When the tenon block (71) is inserted into the tenon groove (73), two adjacent slots can be spliced ​​to form a rectangular limiting groove (74). A limiting insert (72) can be detachably inserted into the limiting groove (74).

4. The wind turbine pitch control device according to claim 2, characterized in that: The fastening structure (4) includes multiple through holes (43) on the outer circumference of the drum (2) and multiple threaded holes (42) on the outer circumference of the connecting plate (8). The multiple through holes (43) correspond one-to-one with the multiple threaded holes (42), and each through hole (43) is provided with a fastening bolt (41) that is screwed into its corresponding threaded hole (42).

5. The wind turbine pitch control device according to claim 1, characterized in that: The pitch adjustment mechanism (6) includes multiple rotating shafts rotatably mounted on the outer circumference of the drum (2) and a mounting plate mounted inside the drum (2). Multiple motors (61) are fixedly connected to the mounting plate, and the multiple motors (61) correspond one-to-one with the multiple rotating shafts and are connected to transmission components. The multiple blades (3) are respectively mounted on one end of the rotating shaft.

6. The wind turbine pitch control device according to claim 5, characterized in that: The transmission component includes a main gear (62) mounted on the main shaft of the motor (61), one end of the rotating shaft extends into the drum (2) and is mounted with a connecting shaft (64), and a secondary gear (63) meshing with the main gear (62) is mounted on the connecting shaft (64).

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