Wind generating set with function of automatically adjusting clearance size of blade

Abstract

The utility model discloses a wind generating set with the function of automatically adjusting the clearance size of a blade, which comprises a main engine and a tower, and further comprises an engine base and a lifting device, the tail end of the main engine is hinged on the engine base, the engine base is arranged at the top of the tower through a yaw bearing, the lifting device is arranged on the engine base and is connected with the main engine, and the lifting device is connected with the main engine. The main engine is driven to swing around a hinge point to adjust the clearance size from blade tips at the front end of the main engine to the tower. The blade clearance adjusting device is suitable for installing blades with different lengths, and the blade clearance size can be automatically adjusted at different wind speeds.

Description

Technical Field

[0001] This utility model relates to the technical field of wind power generation, and in particular to a wind turbine generator set with an automatic blade clearance adjustment function. Background Technology

[0002] With the trend towards larger wind turbine generators, the length of the blades is also increasing. This increased blade length brings a series of challenges related to component structure design, material selection, and blade clearance. These include factors such as changes in the mount angle, hub cone angle, blade material selection, and stiffness design. The longer the blade, the greater the impact on these factors. Ultimately, this affects the design cost of the wind turbine generator and introduces control and operational risks. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a wind turbine generator set with automatic blade clearance adjustment function, which can adapt to the installation of different blade lengths and can automatically adjust the blade clearance size under different wind speeds.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: a wind turbine generator set with automatic blade clearance adjustment function, including a main unit and a tower, and also including a base and a lifting device, wherein the end of the main unit is hinged to the base, the base is mounted on the top of the tower through a yaw bearing, and the lifting device is mounted on the base and connected to the main unit, for driving the main unit to swing around the hinge point to adjust the clearance between the blade tip of the main unit and the tower.

[0005] Preferably, there is one lifting device located below the main unit and on the same vertical plane as the hinge point.

[0006] Preferably, there are two lifting devices, which are symmetrically arranged on both sides of the host about the main shaft axis of the host.

[0007] Preferably, the base extends forward toward the front end of the main unit and has a mounting position for installing the lifting device.

[0008] Preferably, the lifting device is a hydraulic lifting cylinder, a ball screw, a servo motor, or an electric push rod.

[0009] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0010] 1. This utility model uses a lifting device to lift the main unit so that it can swing around the hinge point, thereby achieving the purpose of automatically adjusting the safe clearance size of the blades and avoiding the risk of blades sweeping the tower.

[0011] 2. The use of this utility model can optimize the base design, eliminating the need to set different tilt angles and improving the degree of versatility.

[0012] 3. This utility model is adaptable to the installation of different blade lengths and can automatically adjust the blade clearance size under different wind speeds. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the wind turbine generator set in Example 1.

[0014] Figure 2 yes Figure 1 A magnified view of part A. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0016] Example 1

[0017] like Figure 1 and Figure 2 As shown, this embodiment discloses a wind turbine generator set with an automatic blade clearance adjustment function, including a main unit 1, a tower 2, a base 3, and a lifting device 4. The end of the main unit 1 is hinged to the base 3. The base 3 is mounted on the top of the tower 2 via a yaw bearing. The base 3 extends forward toward the front end of the main unit 1 to provide a mounting position for the lifting device 4. There are two lifting devices 4, specifically hydraulic lifting cylinders. These two hydraulic lifting cylinders are symmetrically arranged on both sides of the main unit 1 about the main shaft axis. The cylinder bodies of the two hydraulic lifting cylinders are vertically mounted at the aforementioned mounting positions, and their piston heads are vertically connected to the side of the main unit 1. When the wind turbine generator set is in operation, if the blades vibrate under the action of wind force and exceed the clearance requirement, the extension of the two hydraulic lifting cylinders can cause the main unit 1 to swing around the hinge point, thereby raising the front end of the main unit 1 to adjust the clearance size from the blade tip to the tower 2, maintaining a safe blade clearance size, and thus avoiding the risk of blade tip swishing against the tower.

[0018] Example 2

[0019] Unlike Embodiment 1, this embodiment has only one lifting device 4 (not shown in the figure), which is also a hydraulic lifting cylinder. This hydraulic lifting cylinder is located below the main unit 1 and is on the same vertical plane as the hinge point. The cylinder body of the hydraulic lifting cylinder is vertically installed at the mounting position, and its piston head is vertically connected to the bottom of the main unit 1. When the wind turbine is in operation, if the blades oscillate under the action of wind and exceed the clearance requirement, the extension of the hydraulic lifting cylinder can make the main unit 1 swing around the hinge point, thereby raising the front end of the main unit 1 to adjust the clearance size from the blade tip of the front end of the main unit 1 to the tower 2, maintaining the safe clearance size of the blade, and thus avoiding the risk of blade tip sweeping the tower.

[0020] Example 3

[0021] Unlike embodiments 1 and 2, the lifting device 4 described in this embodiment can be a ball screw, servo motor, or electric push rod.

[0022] 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 scope of the technology 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 generator set with automatic blade clearance adjustment function, comprising a main unit (1) and a tower (2), characterized in that, It also includes a base (3) and a lifting device (4), wherein the end of the main unit (1) is hinged to the base (3), the base (3) is mounted on the top of the tower (2) via a yaw bearing, and the lifting device (4) is mounted on the base (3) and connected to the main unit (1) for driving the main unit (1) to swing around the hinge point to adjust the clearance dimension of the blade tip of the front end of the main unit (1) to the tower (2).

2. A wind turbine generator set with automatic blade clearance adjustment function according to claim 1, characterized in that, There is one lifting device (4), located below the main unit (1) and on the same vertical plane as the hinge point.

3. A wind turbine generator set with automatic blade clearance adjustment function according to claim 1, characterized in that, There are two lifting devices (4), which are symmetrically arranged on both sides of the host (1) about the main shaft axis.

4. A wind turbine generator set with automatic blade clearance adjustment function according to any one of claims 1 to 3, characterized in that, The base (3) extends forward toward the front end of the main unit (1) and has a mounting position for installing the lifting device (4).

5. A wind turbine generator set with automatic blade clearance adjustment function according to claim 4, characterized in that, The lifting device (4) is a hydraulic lifting cylinder, a ball screw, a servo motor, or an electric push rod.

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