Variable pitch device and wind generating set thereof

Abstract

The utility model provides a variable pitch device and a wind generating set, the variable pitch device is suitable for an electric variable pitch wind generating set, the variable pitch device is installed on a hub of the wind generating set, and the variable pitch device comprises at least one variable pitch flange installed on the hub of the wind generating set; the main driving mechanism is matched with the variable pitch flange; the slave driving mechanism is driven by the master driving mechanism and is matched with the variable pitch flange; and the synchronous driving mechanism is arranged between the master driving mechanism and the slave driving mechanism. The utility model has the advantages of simple structure, can effectively solve the problems of speed synchronization and moment synchronization in a double-drive or multi-drive scheme, and is an effective alternative scheme for the existing double-drive or multi-drive scheme.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and more specifically, to a pitch control device for a wind turbine generator set and the wind turbine generator set thereof. Background Technology

[0002] As the capacity of individual wind turbine generators increases, the rotor diameter also grows accordingly. For ultra-large wind turbines with extra-long blades, dual-drive or multi-drive pitch control systems have emerged. Compared to single-drive systems, dual-drive or multi-drive pitch control systems effectively distribute bearing stress, reduce pitch gear wear, and offer higher reliability. However, synchronizing the speed and torque of the motors in dual-drive or multi-drive pitch control systems remains a persistent challenge in the wind turbine industry.

[0003] However, due to the unique operating characteristics of pitch systems, synchronizing the speed and torque of motors in dual-drive or multi-drive pitch systems remains a challenging industry problem. For example, poor synchronization in an electric dual-drive pitch system can actually accelerate wear on the pitch flange and even lead to tooth breakage.

[0004] Based on the above objectives, it is necessary to design a simple, reasonable, and reliable dual-drive or multi-drive pitch device and its pitch system. Utility Model Content

[0005] The purpose of this invention is to address the deficiencies in the aforementioned background technology by providing a simple dual-drive or multi-drive pitch control device and its wind turbine generator set.

[0006] To achieve the above objectives, one of the present invention provides a pitch control device suitable for electrically variable pitch wind turbine generator sets. The device is mounted on the hub of the wind turbine generator set. The pitch control device includes at least one pitch flange mounted on the hub of the wind turbine generator set; at least one main drive mechanism adapted to the pitch flange; a driven mechanism driven by the main drive mechanism and adapted to the pitch flange; and a synchronous drive mechanism disposed between the main drive mechanism and the driven mechanism.

[0007] In a specific embodiment, the main drive mechanism includes a power output mechanism mounted on the hub and a main drive gear disposed on the output shaft of the power output mechanism and meshing with the pitch flange.

[0008] In a specific embodiment, the driven mechanism includes a driven bearing mounted on the hub, a driven shaft, and a driven gear meshing with the pitch flange.

[0009] In a specific embodiment, the synchronous drive mechanism includes a first synchronous drive gear mounted on the output shaft of the power output mechanism, a second synchronous drive gear mounted on the driven shaft, and a synchronous belt fitted between the first synchronous drive gear and the second synchronous drive gear.

[0010] In a specific embodiment, the line connecting the center point of the driven shaft and the center point of the output shaft of the power output mechanism coincides with one of the diameters of the pitch flange.

[0011] In a specific embodiment, a pitch control device includes a pitch flange, a main drive mechanism, a driven mechanism, and a synchronous drive mechanism disposed between the main drive mechanism and the driven mechanism.

[0012] In a specific embodiment, the main drive mechanism and the driven drive mechanism are arranged at a 180° position relative to each other along the inner ring of the pitch flange, and the line connecting the center point of the output shaft of the power output mechanism and the center point of the driven shaft of the driven drive mechanism passes through the center point of the pitch flange.

[0013] In a specific embodiment, one of the pitch devices includes a pitch flange, two main drive mechanisms, two slave drive mechanisms, and a synchronous drive mechanism respectively disposed between the main drive mechanism and the slave drive mechanism.

[0014] In a specific embodiment, the two main drive mechanisms are positioned at a 90° angle to each other along the inner ring of the pitch flange, and the driven drive gear corresponding to each main drive gear is positioned at a 180° angle to the inner ring of the pitch flange. The line connecting the center point of the output shaft of the power output mechanism and the center point of the driven shaft of the driven mechanism passes through the center point of the pitch flange.

[0015] In a specific embodiment, a pitch control device includes a pitch flange, a main drive mechanism, at least two driven mechanisms, and a synchronous drive mechanism disposed between the main drive mechanism and the driven mechanisms; the main drive mechanism is a power output mechanism installed at the center of the hub; the driven mechanism includes a driven bearing, a driven shaft, and a drive gear meshing with the pitch flange, all mounted on the hub, and the driven mechanisms are evenly distributed along the inner ring of the pitch flange; the synchronous drive mechanism includes a first synchronous drive gear mounted on the output shaft of the power output mechanism, a second synchronous drive gear mounted on the driven shaft, and a synchronous belt fitted between the first synchronous drive gear and the second synchronous drive gear.

[0016] In a specific embodiment, the drive mechanism is configured to be two or three.

[0017] The second invention relates to a wind turbine generator set, which employs the pitch control device provided in the first invention and is applied to megawatt-class horizontal axis wind turbine generator sets.

[0018] In summary, the pitch control device and wind turbine generator set provided by this utility model have a simple structure and can effectively solve the problems of speed synchronization and torque synchronization in dual-drive or multi-drive schemes. It is an effective alternative to existing dual-drive and multi-drive schemes. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a pitch device according to one of the present utility models.

[0020] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of a pitch device according to one of the present utility models.

[0021] Figure 3 This is a three-dimensional structural schematic diagram of an embodiment of a pitch device according to one of the present utility models.

[0022] Figure 4 for Figure 3 The figure shown is a cross-sectional view along the AA direction of one embodiment of a pitch device of this utility model.

[0023] Figure 5 This is a three-dimensional structural schematic diagram of an embodiment of a pitch device according to one of the present invention. Detailed Implementation

[0024] To illustrate the technical content, structural features, objectives, and effects of this utility model in detail, the following embodiments are provided in conjunction with the accompanying drawings.

[0025] Unless otherwise stated, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0026] It should be noted that when the embodiments of this application involve directional terms such as "upper," "lower," "left," and "right," they are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when a component is mentioned as being connected "upper" or "lower" to another component, it can be directly connected to the other component "upper" or "lower," or indirectly connected to the other component "upper" or "lower" through an intermediate component.

[0027] Please see Figures 1 to 5 The first aspect of this utility model is to provide a pitch control device 100 for a wind turbine generator set, which is suitable for wind turbine generator sets using electric pitch control and is installed on the hub 200 of the wind turbine generator set. The pitch control device 100 includes at least one pitch flange 1 installed on the hub 200 of the wind turbine generator set; at least one main drive mechanism 2 adapted to the pitch flange 1; a driven mechanism 3 driven by the main drive mechanism 2 and adapted to the pitch flange 1; and a synchronous drive mechanism 4 disposed between the main drive mechanism 1 and the driven mechanism 3.

[0028] The main drive mechanism 2 includes a power output mechanism 21 mounted on the hub 1 and a main drive gear 22 disposed on the output shaft of the power output mechanism 21 and meshing with the pitch flange 1. The power output mechanism 21 may be an assembly consisting of a pitch motor, a coupling and a reduction gear, or it may be just a pitch motor.

[0029] The driven mechanism 3 includes a driven bearing (not shown in the figure), a driven shaft (not shown in the figure), and a driven gear 31 that meshes with the pitch flange 1, all mounted on the hub 1.

[0030] The synchronous drive mechanism 4 includes a first synchronous drive gear 41 mounted on the output shaft of the power output mechanism 21, a second synchronous drive gear 42 mounted on the driven shaft, and a synchronous belt 43 fitted between the first synchronous drive gear 41 and the second synchronous drive gear 42.

[0031] The line connecting the center point of the driven shaft (not shown in the figure) and the center point of the output shaft of the power output mechanism 21 coincides with one of the diameters of the pitch flange 1.

[0032] Both the driven gear 31 and the second synchronous drive gear 42 are connected by synchronous bearings and driven shafts mounted on the hub 200.

[0033] The main drive gear 22 and the driven gear 31 have the same shape and size; the first synchronous drive gear 41 and the second synchronous drive gear 42 have the same shape and size.

[0034] In one feasible embodiment, a pitch control device 100 includes a pitch flange 1, a main drive mechanism 2, a driven drive mechanism 3, and a synchronization mechanism 4 disposed between the main drive mechanism 2 and the driven drive mechanism 3. Further, the main drive mechanism 2 and the driven drive mechanism 3 are arranged at a 180° position relative to each other along the inner ring of the pitch flange 1, and the line connecting the center point of the output shaft of the power output mechanism 21 and the center point of the driven shaft of the driven drive mechanism 3 passes through the center point of the pitch flange.

[0035] In one feasible embodiment, a pitch control device 100 includes a pitch flange 1, two main drive mechanisms 2, two driven mechanisms 3, and a synchronous drive mechanism 4 respectively mounted between the main drive mechanisms 2 and the driven mechanisms 3. Further, the two main drive mechanisms 2 are positioned at a 90° angle to each other along the inner ring of the pitch flange 1, and the driven gear 31 corresponding to each main drive gear 22 is positioned at a 180° angle on the inner ring of the pitch flange. The line connecting the center point of the output shaft of the power output mechanism 21 and the center point of the driven shaft of the driven mechanism 3 passes through the center point of the pitch flange.

[0036] In one feasible embodiment, a pitch control device 100 includes a pitch flange 1, a main drive mechanism 2, at least two driven mechanisms 3, and a synchronous drive mechanism 4 disposed between the main drive mechanism 2 and the driven mechanisms 3. The main drive mechanism 2 is a power output mechanism 21 installed at the center of the hub 1; the driven mechanism 3 includes a driven bearing (not shown in the figure), a driven shaft (not shown in the figure), and a drive gear 32 meshing with the pitch flange 1, and the driven mechanisms 3 are evenly distributed along the inner ring of the pitch flange 1; the synchronous drive mechanism 4 includes a first synchronous drive gear 41 installed on the output shaft of the power output mechanism 21, a second synchronous drive gear 42 installed on the driven shaft, and a synchronous belt 43 fitted between the first synchronous drive gear 41 and the second synchronous drive gear 42. To ensure the consistency and stability of the wind turbine blade pitch adjustment, the slave drive mechanism 3 should be evenly distributed along the inner ring of the pitch flange 1, centered on the location of the main drive mechanism 2, with the main drive mechanism 2 and the slave drive mechanism 3 spaced equally apart. Preferably, there can be two or three slave drive mechanisms 3.

[0037] The pitch control device further includes a pitch driver electrically connected to the pitch motor, and a power supply electrically connected to the pitch motor and the pitch driver.

[0038] The second aspect of this utility model is to provide a wind turbine generator set that adopts the pitch device 100 provided in the first aspect of this utility model, which is applied to a megawatt-class horizontal axis wind turbine generator set.

[0039] In summary, the pitch control device and wind turbine generator set provided by the utility model have a simple structure and can effectively solve the problems of speed synchronization and torque synchronization in dual-drive or multi-drive schemes. It is an effective alternative to existing dual-drive and multi-drive schemes.

[0040] As described above, these are merely specific embodiments 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 pitch control device suitable for electrically adjustable pitch wind turbine generator sets, mounted on the hub of the wind turbine generator set, the pitch control device comprising at least one pitch flange mounted on the hub of the wind turbine generator set, characterized in that: The pitch control device further includes at least one main drive mechanism adapted to the pitch flange; a slave drive mechanism driven by the main drive mechanism and adapted to the pitch flange; and a synchronous drive mechanism disposed between the main drive mechanism and the slave drive mechanism.

2. The pitch control device according to claim 1, characterized in that, The main drive mechanism includes a power output mechanism mounted on the hub and a main drive gear disposed on the output shaft of the power output mechanism and meshing with the pitch flange.

3. A pitch control device according to claim 2, characterized in that, The driven mechanism includes a driven bearing, a driven shaft, and a driven gear that meshes with the pitch flange, all mounted on the hub.

4. A pitch control device according to claim 3, characterized in that, The synchronous drive mechanism includes a first synchronous drive gear mounted on the output shaft of the power output mechanism, a second synchronous drive gear mounted on the driven shaft, and a synchronous belt fitted between the first synchronous drive gear and the second synchronous drive gear.

5. A pitch control device according to claim 4, characterized in that, The line connecting the center point of the driven shaft and the center point of the output shaft of the power output mechanism coincides with one of the diameters of the pitch flange.

6. A pitch control device according to claim 5, characterized in that, A pitch control device includes a pitch flange, a main drive mechanism, a driven mechanism, and a synchronous drive mechanism mounted between the main drive mechanism and the driven mechanism.

7. A pitch control device according to claim 6, characterized in that, The main drive mechanism and the driven drive mechanism are positioned at 180° relative to each other along the inner ring of the pitch flange, and the line connecting the center point of the output shaft of the power output mechanism and the center point of the driven shaft of the driven drive mechanism passes through the center point of the pitch flange.

8. A pitch control device according to claim 5, characterized in that, One of the pitch control devices includes a pitch flange, two main drive mechanisms, two slave drive mechanisms, and a synchronous drive mechanism respectively disposed between the main drive mechanism and the slave drive mechanism.

9. A pitch control device according to claim 8, characterized in that, The two main drive mechanisms are positioned at a 90° angle to each other along the inner ring of the pitch flange, and the driven drive gear corresponding to each main drive gear is positioned at a 180° angle to the inner ring of the pitch flange. The line connecting the center point of the output shaft of the power output mechanism and the center point of the driven shaft of the driven mechanism passes through the center point of the pitch flange.

10. A pitch control device according to claim 1, characterized in that, A pitch control device includes a pitch flange, a main drive mechanism, at least two driven mechanisms, and a synchronous drive mechanism disposed between the main drive mechanism and the driven mechanisms; the main drive mechanism is a power output mechanism installed at the center of the hub; the driven mechanism includes a driven bearing, a driven shaft, and a drive gear meshing with the pitch flange, all mounted on the hub, and the driven mechanisms are evenly distributed along the inner ring of the pitch flange; the synchronous drive mechanism includes a first synchronous drive gear mounted on the output shaft of the power output mechanism, a second synchronous drive gear mounted on the driven shaft, and a synchronous belt fitted between the first synchronous drive gear and the second synchronous drive gear.

11. A pitch control device according to claim 10, characterized in that, The drive mechanism is configured to be two or three.

12. A wind turbine generator set, characterized in that, The wind turbine uses a pitch control device as described in any one of claims 1 to 11, which is applied in megawatt-class horizontal axis wind turbines.

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