The manufacture and application of wind power pitch slip ring

Wind power pitch slip ring is one of the important components of wind turbines. It is mainly composed of a stator and a rotor. The rotor is provided with a power ring, a control ring, a communication ring and an insulator. The existing wind power pitch slip ring is produced by injection molding insulator. With the needs of industrial production, the power of wind turbines has gradually increased from 0.75 MW to IOMW, and the power has become larger and larger; therefore, the voltage transmitted by wind power pitch slip rings installed in these wind turbines has also increased. Higher and higher; and the interference of high voltage on control signals and communication signals will become stronger. The traditional injection molding production method cannot add shielding measures inside the pitch slip ring during the production process. Therefore, the pitch slip ring working in a high voltage environment will often fail to control, which affects the use and safety of the whole machine; in addition, those In order to avoid the inconvenience caused by the high salt spray on the sea, the generators used in offshore wind power also need to be treated with anti-salt spray on the pitch slip ring. However, after the traditional pitch slip ring has been treated with anti-salt spray, Further processing has affected the effect of salt spray prevention. In addition, the injection molding process needs to involve injection molds, injection molding machines, etc., and the R&D cost is large and the cycle is long, which greatly increases the production cost of the enterprise. Therefore, there is a need for a new type of pitch slip ring which can solve the above-mentioned problems. In order to solve the above-mentioned shortcomings in the prior art, Benlian Electronics proposes a simple structure, ingenious design, suitable for transmitting high voltage current, control signals and communication signals, and can ensure the anti-salt spray function after anti-salt spray treatment. Destroyed pitch slip ring.

The wind power pitch slip ring includes a casing and a stator connected to it. A rotor is arranged in the casing. The rotor is characterized in that the rotor comprises a main shaft, and a high-voltage resistant insulating sleeve is arranged on the main shaft. The anti-pulse insulating sleeve and the anti-electromagnetic interference sleeve are installed on the anti-electromagnetic interference sleeve by means of interference fit, which are sequentially installed with a power ring, a high-voltage resistant insulator, an anti-pulse insulator, an anti-electromagnetic interference insulator, a control ring and a communication ring. The end is clamped by the clamping nut.

Compared with the prior art, the pitch slip ring of this structure has the following advantages. Its structure is simple and the design is ingenious. It is produced by injection molding for the existing pitch slip ring, so it cannot be used in the production process. A shielding structure is set inside, which results in high voltage affecting its transmitted signals. A high-voltage resistant insulation sleeve and an anti-pulse insulation sleeve are set on the rotor to eliminate the impact of high voltage in the working environment of the pitch slip ring. At the same time, the pitch slip ring of this structure does not require any form of subsequent processing after the assembly is completed, so it can be treated with salt spray on its surface, without worrying about the need to follow up the slip ring after the salt spray treatment. Processing will affect the anti-salt spray effect. Therefore, it can be said that this kind of pitch slip ring has many advantages, is particularly suitable for popularization and application in this field, and its market prospect is relatively broad.