CN201610827U - Variable pitch slip ring mechanism of wind turbine generator - Google Patents

Abstract

The utility model discloses a slip ring mechanism of a wind turbine generator, which comprises a conductive shaft electricity box fixedly equipped with a slip ring component, the interface box of a standard cable connection terminal, an encoder and an encoder shielding case, as well as various fastening pieces and sealing pieces, wherein the interface box is in airtight connection with the electricity box through the sealing pieces, a transitional flange and the fastening pieces; the electricity box is in airtight connection with the encoder shielding case through the sealing pieces and the fastening pieces; a surge electricity box equipped with a surge protector is arranged below the conductive shaft electricity box; and the conductive shaft electricity box is closed and equipped with an electrical heating module for keeping the constant temperature of the electricity box. Through the variable pitch slip ring mechanism of the wind turbine generator provided by the utility model, the using environment of the slip ring is effectively expanded, the slip ring can be led to be applied to severe environments required for the slip rings, the installation is convenient, and the reliability is high.

Description

A pitch slip ring mechanism for a wind power generator

technical field

The utility model relates to a component of a wind power generator, in particular to a pitch-variable slip ring mechanism of the wind power generator.

Background technique

Slip rings, also known as rotary electrical interfaces and electrical rotary joints, can be used in any electrical system that requires unrestricted continuous rotation to transmit power and data signals from a fixed structure to a rotating structure. It is often used in electromechanical systems that require unlimited, continuous or intermittent rotation, and transmits power and data signals. It can simplify and improve system performance without damaging the wires. At present, the slip ring is the main electrical device to realize the signal and power transmission of the rotating dynamics. It is mainly composed of the ring body and the brush in a contact manner, and makes a relative rotational movement to realize the signal and power transmission on the rotating body. His The main structure is composed of conductive shaft (including lead wire), brush (including brush lead wire), slip ring bracket, bearing and bearing end cover. When the conductive shaft is mechanically connected with the rotating object, the wire and the need to provide power and signal The interface is connected one by one, the slip ring bracket is fixed on the stationary object, and the brush leads are connected to the signal and power ports that need to be input, so that the conductive shaft and the brush rotate relative to each other to realize the transmission of signals and power. Ordinary slip rings have higher requirements in use, and the use environment is generally indoors at room temperature, while the use environment of wind turbines is outdoors, such as deserts and seasides. These environments are often harsh environments, such as dust, sea water vapor or Working in an environment of minus 40 degrees Celsius, and being damaged by natural lightning from time to time, it is necessary to achieve stable work, which is difficult for ordinary slip rings, or frequent failures make the use of fans inefficient; in addition, as high-altitude operations It is said that both replacement and maintenance are disadvantageous, and the cost of use remains high.

Utility model content

The purpose of this utility model is to provide a pitch-variable slip ring mechanism of a wind power generator to solve the above-mentioned problems of the existing slip ring technology. Make the wind turbine pitch slip ring work normally in harsh working environment.

The purpose of this utility model can be achieved through the following technical solutions.

A pitch slip ring mechanism for a wind power generator, including a conductive shaft electrical box installed and fixed with a slip ring assembly, an interface box for standard cable connection terminals, an encoder and an encoder shield, and various fasteners and seals parts; the interface box and the conductive shaft electric box are airtightly connected through seals, transition flanges and fasteners, and the conductive shaft electric box and the encoder shield are airtightly connected through seals and fasteners; A surge electric box equipped with a surge protector is arranged below the above-mentioned conductive shaft electric box, and the conductive shaft electric box is sealed and is provided with an electric heating module for maintaining a constant temperature of the electric box.

The conductive shaft electric box is provided with an input terminal, and the input terminal and the conductive shaft electric box are connected and fixed by a sealed joint; the power supply and the signal line are connected in parallel with the surge protector through the input terminal, and are connected with the brushes of the slip ring assembly, The conductive shaft is connected in series with the output terminal; the electric brush is in rotational contact with the conductive shaft.

The electric box body of the conductive shaft is composed of an electric box cover plate arranged on the outer layer and a sealing member arranged on the inner layer; all terminal interfaces are connected by the sealing member.

The rotational angle position of the conductive shaft is connected to the connecting shaft of the encoder through the guide shaft and the shaft coupling of the slip ring bearing end cover; the encoder is installed on the encoder mounting plate through the transition sleeve, and the encoder mounting plate is sealed The gasket is sealed and fixed with the conductive shaft electric box; the encoder shield is sealed by the gasket; the encoder shield is provided with an encoder interface.

The slip ring assembly includes a conductive shaft, a slip ring bracket and a brush assembly. A dynamic sealing ring and a sealing friction plate are used to ensure a dynamic sealing connection between the conductive shaft and the slip ring bracket. The brush is inserted through a slanted hole, and the slip ring The support is set as a four-rib structure.

The conductive shaft electric box and the surge electric box are connected through a sealing sponge, and the cover plate of the electric box is sealed by a sealing gasket of the electric box.

The electric heating module is connected in parallel with the input power loop through the surge protector to obtain the working voltage.

A bracket is installed on the outer wall of the conductive shaft electrical box, and a mounting hole is provided outside the interface box for mechanical connection with the wind power generator.

The input and output terminals mentioned above are all standard interfaces.

From the power and signal input interface to the output port, the utility model fully realizes IP65 protection (that is, completely prevents dust from entering and washing with water without any damage). No matter what the external environment is, the working environment of the slip ring assembly is like a laboratory. An electric heating module is installed in the working conductive shaft electrical box of the slip ring assembly to keep the temperature constant. At the input end of the slip ring, lightning protection surge protectors of different specifications are used. When lightning strikes, it can be released through the ground and automatically recover in 0.3 nanoseconds. The bracket of the slip ring is made of high-strength aluminum alloy material with four ribs. The supporting structure can ensure stable working performance for a long time, and the standard terminal interface allows slip ring components to be quickly installed.

The pitch slip ring mechanism of the wind power generator set by the utility model effectively expands the use environment of the slip ring, enables the slip ring to be more widely used in the harsh environment required, and is easy to install and has high reliability .

Description of drawings

Fig. 1 is the side view structural representation of the utility model;

Fig. 2 is the top view structural representation of the utility model;

Fig. 3 is a structural schematic diagram of a cross section of a slip ring assembly;

In the figure: 10. Conductive shaft electric box 11. Slip ring assembly 12. Electric brush

13. Slip ring bracket 14. Conductive shaft 15. Electric heating module

16. Input terminal 17. Bracket 20. Surge box

21. Surge protector 30. Interface box 31. Cable connection terminal

40. Encoder shield 41. Encoder 42. Encoder interface.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment further set forth the structural feature of the present utility model.

Slip ring assembly as shown in Figure 3, described slip ring assembly 11 comprises conductive shaft 14, slip ring support 13 and electric brush 12, and described electric brush 12 adopts oblique hole to insert, and described slip ring support 11 is set to Four-rib structure.

As shown in Figure 1 and Figure 2, a pitch slip ring mechanism of a wind power generator includes a conductive shaft electrical box 10 installed and fixed with a slip ring assembly 11, an interface box 30 integrating cable connection terminals 31, an encoder 41 and Encoder shield 40, and various fasteners and seals; the interface box 30 and the conductive shaft box 10 are airtightly connected through seals, transition flanges and fasteners, and the conductive shaft box 10 It is airtightly connected with the encoder shield 40 through seals and fasteners; a surge electric box 20 with a surge protector 21 is installed under the conductive shaft box 10, and the conductive shaft box 10 is airtight and An electric heating module 15 for maintaining a constant temperature of the conductive shaft electric box 10 is provided.

The conductive shaft electric box 10 is provided with an input terminal 16, and the input terminal 16 and the conductive shaft electric box 10 are connected and fixed through a sealed joint; the power supply and signal line are connected in parallel with the surge protector 21 through the input terminal 16, and connected with the sliding The brush 12 and the conductive shaft 14 of the ring assembly 11 are connected in series, and are connected in series with the output terminal; the brush 12 is in rotational contact with the conductive shaft 14 .

The box body of the conductive shaft electric box 10 is composed of an electric box cover plate arranged on the outer layer and a sealing member arranged on the inner layer; all terminal interfaces are connected by the sealing member.

The angular position of the conductive shaft 14 is connected to the link shaft of the encoder 41 through the lead shaft and the shaft coupling of the slip ring bearing end cover; the encoder 41 is installed on the encoder mounting plate through a transition sleeve, and the encoder is installed The plate is sealed and fixed with the conductive shaft box 10 through the sealing gasket; the encoder shield 40 is sealed through the sealing gasket; the encoder shield 40 is provided with an encoder interface 42 .

The conductive shaft electric box 10 and the surge electric box 20 are connected through the sealing sponge, and the electric box cover plate is sealed by the electric box sealing gasket.

The electric heating module 15 is connected in parallel to the input power loop through a surge protector 21 to obtain a working voltage.

A bracket 17 is installed on the outer wall of the conductive shaft electrical box 10, and an installation hole is provided outside the interface box 30 for mechanical connection with the wind power generator.

The input and output terminals mentioned above are all standard interfaces.

Claims (8)

1. the change oar slip ring mechanism of a wind-driven generator comprises the conductive shaft electronic box that is mounted with slip ring assembly, the interface box of standard cable splicing ear, encoder and encoder radome, and various fastening piece spare and Sealing; It is characterized in that: be connected by Sealing, counter flange and fastening piece are airtight between described interface box and the conductive shaft electronic box, be connected by Sealing and fastening piece are airtight between conductive shaft electronic box and the encoder radome; Described conductive shaft electronic box below is provided with the surge electronic box that Surge Protector is installed, and the conductive shaft electronic box is airtight and be provided with the electric heating module that keeps electronic box constant temperature.

2. the change oar slip ring mechanism of wind-driven generator according to claim 1, it is characterized in that: described conductive shaft electronic box is provided with input terminal, is connected and fixed by SEALING FITTING between input terminal and the conductive shaft electronic box; Power supply and signaling line are in parallel with Surge Protector by input terminal, connect with brush, the conductive shaft of slip ring assembly, and connect with Out let; Described brush contacts with the conductive shaft rotation.

3. the change oar slip ring mechanism of wind-driven generator according to claim 1 is characterized in that: described conductive shaft electronic box is made of the Sealing that is arranged on outer field electronic box cover plate and is set to internal layer; All terminal interface are all connected by Sealing.

4. the change oar slip ring mechanism of wind-driven generator according to claim 1, it is characterized in that: described slip ring assembly comprises conductive shaft, slip ring spider and brush assembly of electric, guarantee that by dynamic seal ring and seal friction sheet dynamic seal (packing) is connected between conductive shaft and the slip ring spider, described slip ring spider is set to four muscle structures.

5. the change oar slip ring mechanism of wind-driven generator according to claim 4 is characterized in that: the angle position of described conductive shaft is connected with the encoder coupling shaft with shaft joint by the axle that draws of slip ring bearing (ball) cover; Described encoder is installed on the encoder mounting plate by spacer shell, and the encoder mounting plate is sealedly connected and fixed by gasket seal and conductive shaft electronic box; The encoder radome seals by gasket seal; The encoder radome is provided with encoder interfaces.

6. the change oar slip ring mechanism of wind-driven generator according to claim 1 is characterized in that: described conductive shaft electronic box is connected with the surge electronic box by the sealing sponge and connects, and the electronic box cover plate is by the sealing of electronic box gasket seal.

7. the change oar slip ring mechanism of wind-driven generator according to claim 1, it is characterized in that: described conductive shaft electronic box outer wall is equipped with support, and interface box is outside equipped with mounting hole, to be used for and the wind-driven generator mechanical connection.

8. the change oar slip ring mechanism of wind-driven generator according to claim 1, it is characterized in that: described input and output terminal is standard interface.

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