Fan variable pitch mechanism

Abstract

The utility model discloses a fan variable pitch mechanism, which relates to the technical field of wind power generation equipment and comprises a casing, a plurality of first blades, a plurality of second blades and a plurality of rotating discs, the first blades are arranged on the outer wall of the casing, the second blades are arranged on one sides of the first blades, the rotating discs are rotatably connected to the inner wall of the casing, and the first blades are arranged on the outer wall of the casing. A ring gear is installed in the rotating disc, a transmission gear is meshed with the ring gear, a first bevel gear is installed at one end of the connecting shaft, a second bevel gear is rotationally connected to the inner bottom wall of the machine shell, and the second bevel gear is meshed with the first bevel gear. The inner bottom wall of the machine shell is provided with a self-locking assembly used for conducting self-locking on the second bevel gear. According to the utility model, the worm and gear are driven by the motor, so that the two bevel gears are driven to rotate in a meshed manner, the rotating disc is rotated, the angles of the paddles are adjusted, and the angles of the paddles can be locked to avoid reverse rotation of the paddles.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, specifically a wind turbine pitch mechanism. Background Technology

[0002] Pitch control is a core technology in modern wind turbine generators. Its purpose is to optimize wind energy utilization, control power generation, and ensure equipment safety by adjusting the windward angle of the turbine blades. In wind power generation, pitch control is one of the important means to achieve efficient energy capture and safe operation of the entire system.

[0003] For example, a wind turbine pitch mechanism described in patent publication number CN222228735 U describes a scheme where, at the desired blade angle, a drive motor rotates a first bevel gear, which in turn drives a second bevel gear to rotate a rotating shaft, thereby adjusting the blade angle. Because an auxiliary roller is provided on the clamping plate, the rotation of the rotating shaft is further enhanced by the auxiliary roller. When the motor stops, the clamping plate is firmly pressed against the outer wall of the rotating shaft by the damping rod and clamping spring, ensuring the stability of the adjusted blade.

[0004] The aforementioned technologies have the problem that it is difficult to lock the position of the blades during operation. In some extreme weather and wind speed conditions, such as typhoons and storms, excessive wind loads may apply excessive torque to the blades, causing the blades to shift position or even reverse. Utility Model Content

[0005] The purpose of this invention is to provide a wind turbine pitch mechanism to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wind turbine pitch control mechanism, comprising:

[0008] chassis;

[0009] A plurality of first blades, wherein the first blades are disposed on the outer wall of the housing;

[0010] A plurality of second blades, wherein the second blades are disposed on one side of the first blade;

[0011] It also includes several rotating disks, which are rotatably connected to the inner wall of the housing. A ring gear is installed inside the rotating disk, and a transmission gear meshes with each other on the ring gear. A connecting shaft is installed inside the transmission gear, and a first bevel gear is installed at one end of the connecting shaft. A rotating column is rotatably connected to the inner bottom wall of the housing, and a second bevel gear is installed at the end of the rotating column. The second bevel gear meshes with the first bevel gear. A self-locking component is provided on the inner bottom wall of the housing to enable the second bevel gear to self-lock.

[0012] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0013] In one alternative embodiment: the self-locking assembly includes a worm gear, which is fixedly connected to the outer wall of the rotating column. A worm is meshed with one side of the worm gear. A motor is installed on the inner bottom wall of the housing. The output end of the motor is installed on the worm, and one end of the worm is rotatably connected to the housing.

[0014] In one alternative: the first blade is provided with a fixing component for fixing the second blade.

[0015] In one alternative: the fixing component includes a protrusion mounted on the side of the second blade near the first blade, the first blade having a groove inside corresponding to the position of the protrusion, a bolt being installed between the first blade and the protrusion, a nut being installed at the top of the bolt, and a nut being provided at the bottom of the bolt.

[0016] In one alternative: the protrusion has a screw hole inside that corresponds to the bolt position.

[0017] In one alternative: the first blade is mounted on one side of the rotating disk.

[0018] In one alternative: a support frame is installed on the inner bottom wall of the housing, and the connecting shaft passes through the interior of the support frame.

[0019] In one alternative: the plurality of first blades rotate synchronously.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention separates the first and second blades, utilizing simple bolts and nuts for assembly and disassembly. This significantly reduces the size limitations and inconvenience of the blades during transportation, and also lowers transportation costs. During assembly, the fixing components ensure quick positioning and precise connection, significantly improving assembly efficiency. Simultaneously, the motor drives the worm gear, which in turn drives two bevel gears to mesh and rotate, causing the rotating disk to rotate and allowing the blade angle to be adjusted. The blade angle can also be locked to prevent reverse rotation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0024] Figure 3 This is a partially exploded structural diagram of the present invention.

[0025] Figure 4 This utility model Figure 2 A magnified structural diagram of A in the diagram.

[0026] Wherein: 100, housing; 200, first blade; 300, second blade; 401, rotating disk; 402, ring gear; 403, transmission gear; 404, connecting shaft; 405, first bevel gear; 406, second bevel gear; 501, rotating column; 502, worm gear; 503, worm; 504, motor; 601, protrusion; 602, slot; 603, bolt; 604, nut; 606, nut; 701, screw hole; 702, support frame. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, such as Figures 1-4 As shown, a wind turbine pitch mechanism includes: a housing 100, a plurality of first blades 200, a plurality of second blades 300, and a plurality of rotating disks 401. The first blades 200 are disposed on the outer wall of the housing 100, and the second blades 300 are disposed on one side of the first blades 200. The rotating disks 401 are rotatably connected to the inner wall of the housing 100. A ring gear 402 is installed inside the rotating disk 401, and transmission gears 403 mesh with each other on the ring gear 402. A connecting shaft 404 is installed inside the transmission gears 403, and a first bevel gear 405 is installed at one end of the connecting shaft 404. The housing 100... A rotating column 501 is rotatably connected to the inner bottom wall of the housing 100. A second bevel gear 406 is installed at the end of the rotating column 501. The second bevel gear 406 meshes with the first bevel gear 405. A self-locking component is provided on the inner bottom wall of the housing 100 to enable the second bevel gear 406 to self-lock. By rotating the second bevel gear 406, the first bevel gear 405 is driven to rotate, which in turn drives the connecting shaft 404 to rotate. The connecting shaft 404 drives the transmission gear 403 to rotate, which in turn drives the ring gear 402 to rotate. The ring gear 402 drives the rotating disk 401 to rotate, thereby realizing the angle adjustment of the first blade 200.

[0029] In one embodiment, such as Figure 2 and Figure 3 As shown, the self-locking assembly includes a worm gear 502, which is fixedly connected to the outer wall of the rotating column 501. A worm 503 meshes with one side of the worm gear 502. A motor 504 is installed on the inner bottom wall of the housing 100. The output end of the motor 504 is installed on the worm 503, and one end of the worm 503 is rotatably connected to the housing 100. By starting the motor 504, the worm 503 is driven to rotate, which in turn drives the worm gear 502 to rotate. The worm gear 502 drives the rotating column 501 to rotate, which in turn drives the second bevel gear 406 to rotate.

[0030] In one embodiment, such as Figure 1 and Figure 4 As shown, the fixing component includes a protrusion 601, which is installed on the side of the second blade 300 near the first blade 200. The first blade 200 has a slot 602 inside that corresponds to the position of the protrusion 601. A bolt 603 is installed between the first blade 200 and the protrusion 601. A nut 604 is installed on the top of the bolt 603, and a nut 606 is provided on the bottom of the bolt 603. First, align the protrusion 601 with the slot 602 and place the protrusion 601 inside the slot 602. Then, place the bolt 603 inside the protrusion 601 and the first blade 200, and lock it with the nut 606 to fix the first blade 200 and the second blade 300.

[0031] In one embodiment, such as Figure 4 As shown, the protrusion 601 has a screw hole 701 inside that corresponds to the position of the bolt 603, which facilitates the installation of the bolt 604.

[0032] In one embodiment, such as Figure 1 As shown, the first blade 200 is mounted on one side of the rotating disk 401; this facilitates the installation of the first blade 200.

[0033] In one embodiment, such as Figure 2 As shown, a support frame 702 is installed on the inner bottom wall of the housing 100, and the connecting shaft 404 passes through the inside of the support frame 702 to facilitate support of the connecting shaft 404.

[0034] In one embodiment, such as Figure 1 As shown, the plurality of first blades 200 rotate synchronously.

[0035] The above embodiments disclose a wind turbine pitch mechanism. Firstly, during transportation, the first blade 200 and the second blade 300 can be separated by removing the nut 606 from the bolt 603. This solves the problem of transportation inconvenience caused by excessively large blades. Secondly, when installing the first blade 200 and the second blade 300, the protrusion 601 is aligned with the slot 602, and the protrusion 601 is placed inside the slot 602. Then, the bolt 603 is placed inside the protrusion 601 and the first blade 200, and finally locked with the nut 606. Tightening the motor 504 fixes the first blade 200 and the second blade 300 in place. When the blade angle needs to be adjusted, the motor 504 is started, which drives the worm gear 503 to rotate, thereby driving the worm wheel 502 to rotate. The worm wheel 502 drives the rotating column 501 to rotate, thereby driving the second bevel gear 406 to rotate. The second bevel gear 406 drives the first bevel gear 405 to rotate, thereby driving the connecting shaft 404 to rotate. The connecting shaft 404 drives the transmission gear 403 to rotate, which in turn drives the ring gear 402 to rotate. The ring gear 402 drives the rotating disk 401 to rotate, thus achieving the angle adjustment of the first blade 200.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wind turbine pitch mechanism, comprising: Casing (100); A plurality of first blades (200) are disposed on the outer wall of the housing (100); A plurality of second blades (300), the second blades (300) being disposed on one side of the first blade (200); The invention is characterized by further comprising a plurality of rotating disks (401), wherein the rotating disks (401) are rotatably connected to the inner wall of the housing (100), wherein a ring gear (402) is installed inside the rotating disks (401), wherein transmission gears (403) mesh with each other on the ring gears (402), wherein a connecting shaft (404) is installed inside the transmission gears (403), wherein a first bevel gear (405) is installed at one end of the connecting shaft (404), wherein a rotating column (501) is rotatably connected to the inner bottom wall of the housing (100), wherein a second bevel gear (406) is installed at the end of the rotating column (501), wherein the second bevel gear (406) meshes with the first bevel gear (405), and wherein a self-locking assembly for self-locking the second bevel gear (406) is provided on the inner bottom wall of the housing (100).

2. The wind turbine pitch mechanism according to claim 1, characterized in that, The self-locking assembly includes a worm gear (502), which is fixedly connected to the outer wall of the rotating column (501). A worm (503) meshes with one side of the worm gear (502). A motor (504) is installed on the inner bottom wall of the housing (100). The output end of the motor (504) is installed on the worm (503), and one end of the worm (503) is rotatably connected to the housing (100).

3. The wind turbine pitch mechanism according to claim 1, characterized in that, The first blade (200) is provided with a fixing component for fixing the second blade (300).

4. A wind turbine pitch control mechanism according to claim 3, characterized in that, The fixing component includes a protrusion (601) which is installed on the side of the second blade (300) near the first blade (200). The first blade (200) has a slot (602) inside that corresponds to the position of the protrusion (601). A bolt (603) is installed between the first blade (200) and the protrusion (601). A nut (604) is installed on the top of the bolt (603), and a nut (606) is provided on the bottom of the bolt (603).

5. A wind turbine pitch mechanism according to claim 4, characterized in that, The protrusion (601) has a screw hole (701) inside that corresponds to the position of the bolt (603).

6. A wind turbine pitch control mechanism according to claim 1, characterized in that, The first blade (200) is mounted on one side of the rotating disk (401).

7. A wind turbine pitch mechanism according to claim 1, characterized in that, The inner bottom wall of the housing (100) is equipped with a support frame (702), and the connecting shaft (404) passes through the inside of the support frame (702).

8. A wind turbine pitch mechanism according to claim 1, characterized in that, The first blades (200) rotate synchronously.

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