Variable pitch system of wind driven generator

Abstract

A variable-pitch system of a wind driven generator comprises a first variable-pitch cabinet, a second variable-pitch cabinet and a motor, the first variable-pitch cabinet and the second variable-pitch cabinet are arranged in a hub of the generator in a bilateral symmetry mode, the motor is fixed in the hub of the generator, the first variable-pitch cabinet is electrically connected with the second variable-pitch cabinet, and the first variable-pitch cabinet is electrically connected with the motor. Wherein the first variable pitch cabinet comprises a first variable pitch cabinet body and a driver; the second variable pitch cabinet comprises a second variable pitch cabinet body and a capacitor. Compared with the prior art, the variable pitch cabinet has the advantages that the functions of three traditional variable pitch cabinets are achieved through the two variable pitch cabinets, the space utilization rate is greatly increased, and the installation time is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the field of wind power generation, in particular to a variable pitch system of a wind power generator. Background Art

[0002] In the installation process of traditional wind turbines, three variable pitch machines are used. The structure of each variable pitch machine is the same. A driver and three capacitors are installed in each variable pitch cabinet. Then each variable pitch machine is connected to a corresponding motor to control a blade. Then the three variable pitch machines control three blades. However, in the actual use and installation process, the three variable pitch cabinets not only occupy a large space in the hub, but also require a long installation time.

[0003] To solve the above problems, we made a series of improvements. Utility Model Content

[0004] The purpose of the utility model is to provide a variable pitch system for a wind turbine generator to overcome the above-mentioned shortcomings and deficiencies in the prior art.

[0005] A wind turbine pitch system, comprising: a first pitch cabinet, a second pitch cabinet and a motor, wherein the first pitch cabinet and the second pitch cabinet are symmetrically arranged in a generator hub, the motor is fixed in the generator hub, the first pitch cabinet and the second pitch cabinet are electrically connected, and the first pitch cabinet and the motor are electrically connected;

[0006] Among them, the first pitch cabinet includes: a first pitch cabinet cabinet body and a driver, and the second pitch cabinet includes: a second pitch cabinet cabinet body and a capacitor. The driver is arranged in the first pitch cabinet cabinet body, the driver is electrically connected to the capacitor, the driver is electrically connected to the motor, and the capacitor is arranged in the second pitch cabinet cabinet body.

[0007] Beneficial effects of the utility model:

[0008] Compared with the traditional technology, the utility model realizes the function of the traditional three pitch cabinets through two pitch cabinets, greatly increases the space utilization rate and reduces the installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2 It is a variable pitch system for traditional wind turbines.

[0011] Figure 3 It is a schematic diagram of the structure of the first pitch cabinet.

[0012] Figure 4 It is a schematic diagram of the structure of the first pitch cabinet.

[0013] Figure 5 This is a schematic diagram of the structure of a pitch cabinet of a traditional wind turbine.

[0014] Reference numerals:

[0015] A first pitch cabinet 100 , a first pitch cabinet body 110 and a driver 120 .

[0016] The second pitch cabinet 200 includes a second pitch cabinet body 210 and a capacitor 220 .

[0017] The electric machine 300 and the generator hub 400 . DETAILED DESCRIPTION

[0018] The following is a further description of the present invention in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0019] Example 1

[0020] Figure 1 It is a structural schematic diagram of the utility model. Figure 2 It is a variable pitch system for traditional wind turbines. Figure 3 It is a schematic diagram of the structure of the first pitch cabinet. Figure 4 It is a schematic diagram of the structure of the first pitch cabinet. Figure 5 This is a schematic diagram of the structure of a pitch cabinet of a traditional wind turbine.

[0021] like Figure 1 As shown, a pitch system of a wind turbine includes: a first pitch cabinet 100, a second pitch cabinet 200 and a motor 300. The first pitch cabinet 100 and the second pitch cabinet 200 are symmetrically arranged in a generator hub 400, and the motor 300 is fixed in the generator hub 400. The first pitch cabinet 100 and the second pitch cabinet 200 are electrically connected, and the first pitch cabinet 100 and the motor 300 are electrically connected.

[0022] like Figure 3 and 4 As shown, the first pitch cabinet 100 includes: a first pitch cabinet body 110 and a driver 120, the second pitch cabinet 200 includes: a second pitch cabinet body 210 and a capacitor 220, the driver 120 is arranged in the first pitch cabinet body 110, the driver 120 is electrically connected to the capacitor 220, the driver 120 is electrically connected to the motor 300, and the capacitor 220 is arranged in the second pitch cabinet body 210.

[0023] like Figure 2As shown, the improvements of the utility model are as follows: First, the traditional three variable pitch cabinets are changed to two variable pitch cabinets. The most direct effect is that the space occupancy rate is only 2 / 3 of the original, and the installation time is only 2 / 3 of the original. Then their position relationship is also to avoid interference with each other and the installation of the motor. The triangular installation occupies more than the number of 3 units. There will be a large space in the middle, but there is no other structure. In addition to reducing the number, the utility model adopts a parallel position setting, which directly improves the space utilization rate.

[0024] like Figure 5 As shown, the premise of the above advantages is how to use 2 to replace 3 to achieve the same effect. If the effect is also reduced while reducing the number, this is a simple replacement and technical degradation. Therefore, we must first analyze the structure of the traditional wind turbine pitch system. The traditional pitch cabinet is to place the capacitor and the driver in 3 identical pitch cabinets. For example, 9 capacitors and 3 drivers are evenly distributed into a set of 3 capacitors and 1 driver, and then placed in the pitch cabinet. Then in order to prevent interference in the middle, it is necessary to separate them through partitions, and a little space needs to be reserved between the capacitor and the driver. In summary, the core problem is that the capacitor and the driver are placed in a pitch cabinet. As a result, the capacitor and the driver cannot fully utilize the space of the pitch cabinet, and in order to prevent conflicts between them, sufficient space needs to be reserved. Finally, space is wasted. By analyzing the core viewpoints of the above contradictions, the utility model makes the following internal improvements. First, the capacitor 220 and the driver 120 are distinguished by class and installed in the second pitch cabinet cabinet 210 and the first pitch cabinet cabinet 110 respectively. In this embodiment, three groups of drivers 120 are arranged in the first pitch cabinet body 110, and there is no need to add partitions for separation, so the space is completely sufficient. Similarly, nine capacitors 220 are placed in the second pitch cabinet body 210, which can also be placed. The space for the additional six capacitors is essentially the space occupied by the baffles and drivers of the traditional pitch cabinet. Therefore, the number of capacitors and drivers does not change, and the performance of the pitch cabinet will not change.

[0025] Finally, the corresponding change is the electrical connection relationship. In the traditional three-cabinet structure, the three pitch cabinets need to be connected to the motor respectively. In the utility model, the driver 120 of the first pitch cabinet 100 is electrically connected to the capacitor 220 of the second pitch cabinet 200, and the driver 120 of the first pitch cabinet 100 is electrically connected to the motor 300.

[0026] Compared with the traditional technology, the utility model realizes the function of the traditional three pitch cabinets through two pitch cabinets, greatly increases the space utilization rate and reduces the installation time.

[0027] The specific implementation modes of the present invention are described above, but the present invention is not limited thereto. The present invention can also have various changes without departing from the purpose of the present invention.

Claims

1. A variable pitch system for a wind turbine, characterized in that: include: A first pitch cabinet (100), a second pitch cabinet (200) and a motor (300), wherein the first pitch cabinet (100) and the second pitch cabinet (200) are symmetrically arranged in a generator hub (400), the motor (300) is fixed in the generator hub (400), the first pitch cabinet (100) and the second pitch cabinet (200) are electrically connected, and the first pitch cabinet (100) and the motor (300) are electrically connected; The first pitch cabinet (100) comprises: a first pitch cabinet body (110) and a driver (120); the second pitch cabinet (200) comprises: a second pitch cabinet body (210) and a capacitor (220); the driver (120) is arranged in the first pitch cabinet body (110); the driver (120) is electrically connected to the capacitor (220); the driver (120) is electrically connected to the motor (300); and the capacitor (220) is arranged in the second pitch cabinet body (210).

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