Profibus photoelectric rotation transmission system for wind power variable pitch system

Abstract

The utility model discloses a kind of profibus photoelectric rotary transmission systems for wind power variable pitch system, it is related to photoelectric rotary transmission technical field.The utility model includes fixed disc, profibus type transmitter, profibus type receiver, transmission shaft, bearing end cover, optical fiber slip ring, optical fiber chuck, rotor shaft stator shaft, rotor bearing, stator bearing, cover plate.Profibus type photoelectric rotary transmission system for wind power variable pitch system input and output signal needs to be scrambled by profibus type transmitter, profibus type receiver, descrambling, through the encoding of input and output signal, decoding, guarantee the reliability and stability of input and output signal.It has the advantages of long service life, signal transmission reliability is high, stability is strong, can prove the reliability and stability of signal transmission, solve the short work cycle, maintenance difficulty, signal transmission unstable / distortion etc.

Description

Technical Field

[0001] This utility model relates to the field of photoelectric rotational transmission technology, specifically a Profibus photoelectric rotational transmission system for wind power pitch systems. Background Technology

[0002] The photoelectric rotary transmission system is a special rotary transmission and conversion device. It is a signal transmission device that realizes signal transmission and conversion between two relatively rotating mechanisms. It realizes optical signal transmission during rotary operation through contactless rotary transmission of fiber optic slip rings. The transmitter in the rotor section realizes the "electro-optic conversion" of the input electrical signal, and then transmits the optical signal to the receiver in the stator section through the fiber optic slip ring. The receiver realizes the "photoelectric conversion" of the optical signal and outputs the customer's electrical signal.

[0003] This invention utilizes a contactless rotational transmission method in the fiber optic slip ring of the photoelectric rotary transmission system, resulting in a longer service life. While traditional electrical contact slip rings have a service life of only 10 million revolutions, the fiber optic slip ring in the photoelectric rotary transmission system, thanks to its contactless rotational transmission technology, can achieve a service life of 100 million revolutions or even higher. Ordinary electrical slip rings transmit signals through line contact between the brush filaments and the rotor, a contact-type mechanical friction transmission method. Due to the decrease in brush filament pressure and the generation of abrasive debris, intermittent interruptions are easily caused during use. Furthermore, the small contact area, easy abrasive debris generation, and short service life lead to signal loss or distortion. Moreover, the inherent mechanical friction characteristics of ordinary electrical slip rings often result in high maintenance costs. Wind turbine generators are typically built in harsh operating environments, leading to difficulties in maintenance and long maintenance cycles. In wind-powered pitch systems applied to harsh conditions, this presents challenges such as difficult maintenance, short service life, and unstable / distorted signal transmission. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides the following technical solution: a Profibus photoelectric rotary transmission system for wind turbine pitch systems, comprising a fixed plate, a drive shaft, a bearing end cover, a rotor shaft, a stator shaft, a rotor bearing, a stator bearing, and a cover plate. The fixed plate is a tubular shape with an open right end and a closed left end. A fiber optic slip ring rotor hole is provided in the middle of the right side plate of the fixed plate. The right end of the tubular drive shaft extends into the fixed plate from left to right through the fiber optic slip ring rotor hole. The rotor shaft has a T-shaped cross-section. The stator shaft is a tubular shape with an open left end and a closed right end. The rotor shaft and the stator shaft are arranged side by side from left to right in the middle of the drive shaft.

[0005] Preferably, the rotor shaft is mounted in the middle of the transmission shaft by screws. The outer wall of the left end of the rotor shaft is in sliding fit with the inner wall of the left side of the middle of the stator. The outer wall of the stator shaft is fixed together with the inner wall of the right side of the middle of the stator. The inner wall of the stator shaft is stepped. Identical rotor bearings and stator bearings are sleeved side by side between the outer wall of the right end of the rotor shaft and the inner wall of the left end of the stator shaft.

[0006] Preferably, the bearing end cover fitted on the right end of the drive shaft presses the stator shaft and rotor shaft together, and the cover plate is fixed to the right port of the stator plate with screws. The annular Profibus type transmitter is fixed to the left end face of the rotor shaft with screws.

[0007] Preferably, the fiber optic slip ring includes a fiber optic slip ring stator and a fiber optic slip ring rotor. The fiber optic slip ring stator is fixed to the right end of the cavity of the drive shaft by screws. An annular fiber optic chuck is inserted into the fiber optic slip ring rotor from right to left and covers the bearing end cover. The fiber optic chuck is fixed to the inner right end face of the stator shaft by screws. The annular Profibus receiver located to the right of the fiber optic chuck is fixed to the right end face of the stator shaft by screws.

[0008] Preferably, the optical ports of the PROFIBUS transmitter and the PROFIBUS receiver are respectively connected to the optical fiber lines at both ends of the optical fiber slip ring, the wire of the PROFIBUS transmitter is connected to the customer signal generator, and the wire of the PROFIBUS receiver is connected to the customer signal processor.

[0009] Preferably, both the cover plate and the fixed plate are made of Cr material with shielding function, which can isolate the influence of the external electromagnetic environment on the Profibus transmitter and Profibus receiver.

[0010] Compared with the prior art, this utility model has the following advantages: (1) The wind power pitch system of this utility model uses a Profibus type photoelectric rotary transmission system to perform contactless rotary transmission of optical signals using fiber optic slip rings, which greatly improves the service life of the product; (2) The input signal of this utility model uses a Profibus type transmitter to realize the "electro-optic conversion" of electrical signals, which has high signal transmission reliability and strong stability, ensuring the reliability and stability of signal transmission; (3) The output signal of this utility model uses a Profibus type receiver to realize the "electro-optic conversion" of optical signals, which has high signal transmission reliability and strong stability, ensuring the reliability and stability of signal transmission; (4) The cover plate and the fixed plate of this utility model use Cr magnetic shielding material with shielding function, which can isolate the influence of the external electromagnetic environment on the Profibus type transmitter and Profibus type receiver, ensuring the electromagnetic interference protection function of the product under harsh working conditions. Attached Figure Description

[0011] Figure 1This is a cross-sectional view of the overall structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the fiber optic slip ring structure of this utility model.

[0013] Figure 3 This is an external view of the Profibus type optical transceiver of this utility model.

[0014] In the diagram: 1-Stator; 2-Profibus transmitter; 3-Profibus receiver; 4-Drive shaft; 5-Bearing end cover; 6-Fiber optic slip ring; 7-Fiber optic chuck; 8-Rotor shaft; 9-Stator shaft; 10-Rotor bearing; 11-Stator bearing; 12-Cover plate; 13-Fiber optic slip ring stator; 14-Fiber optic slip ring rotor. Detailed Implementation

[0015] The following is in conjunction with the appendix Figures 1-3 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0016] This utility model provides a Profibus photoelectric rotary transmission system for wind turbine pitch systems, including a fixed plate 1, a drive shaft 4, a bearing end cover 5, a rotor shaft 8, a stator shaft 9, a rotor bearing 10, a stator bearing 11, and a cover plate 12. The fixed plate 1 is a tubular shape with an open right end and a closed left end. A fiber optic slip ring rotor 14 hole is provided in the middle of the right side plate of the fixed plate 1. The right end of the tubular drive shaft 4 passes through the fiber optic slip ring rotor 14 hole from left to right and extends into the fixed plate 1. The rotor shaft 8 has a T-shaped cross section. The stator shaft 9 is a tubular shape with an open left end and a closed right end. The rotor shaft 8 and the stator shaft 9 are arranged side by side from left to right in the middle of the drive shaft 4. The rotor shaft 8 is mounted on the middle of the transmission shaft 4 by screws. The outer wall of the left end of the rotor shaft 8 is in sliding fit with the inner wall of the middle left side of the stator 1. The outer wall of the stator shaft 9 is fixed together with the inner wall of the middle right side of the stator 1. The inner wall of the stator shaft 9 is stepped. Identical rotor bearings 10 and stator bearings 11 are sleeved side by side between the outer wall of the right end of the rotor shaft 8 and the inner wall of the left end of the stator shaft 9.

[0017] The bearing end cap 5, fitted onto the right end of the drive shaft 4, presses the stator shaft 9 and rotor shaft 8 together. The cover plate 12 is fixed to the right port of the stator plate 1 with screws. The annular Profibus type transmitter 2 is fixed to the left end face of the rotor shaft 8 with screws. The fiber optic slip ring 6 includes a fiber optic slip ring stator 13 and a fiber optic slip ring rotor 14. The fiber optic slip ring stator 13 is fixed to the right end of the cavity of the drive shaft 4 with screws. The annular fiber optic chuck 7 is inserted into the fiber optic slip ring rotor 14 from right to left and covers the bearing end cap 5. The fiber optic chuck 7 is fixed to the inner right end face of the stator shaft 9 with screws. The annular Profibus type receiver 3, located to the right of the fiber optic chuck 7, is fixed to the right end face of the stator shaft 9 with screws.

[0018] The optical ports of PROFIBUS transmitter 2 and PROFIBUS receiver 3 are respectively connected to the optical fiber lines at both ends of the optical fiber slip ring 6. The wires of PROFIBUS transmitter 2 are connected to the customer signal generator, and the wires of PROFIBUS receiver 3 are connected to the customer signal processor. Both cover plate 12 and fixed plate 1 are made of Cr material with shielding function, which can isolate the influence of the external electromagnetic environment on PROFIBUS transmitter 2 and PROFIBUS receiver 3.

[0019] The input signal of the Profibus type photoelectric rotary transmission system used in the wind-powered pitch system first enters the Profibus type transmitter 2. The Profibus type transmitter 2 "scrambles" the electrical signal and converts it into an optical signal. The optical signal is then transmitted to the Profibus type receiver 3 through the rotary transmission function of the fiber optic slip ring 6. The Profibus type receiver 3 then "descrambles" the received optical signal and converts it into an electrical signal for output, ensuring the reliability and stability of signal transmission.

[0020] The rotor section consists of a stator 1, a Profibus transmitter 2, a Profibus receiver 3, a drive shaft 4, a bearing end cover 5, a fiber optic slip ring 6, a fiber optic chuck 7, a rotor shaft 8, a stator shaft 9, a rotor bearing 10, a stator bearing 11, and a cover plate 12. The rotor section consists of the drive shaft 4, rotor shaft 8, rotor bearing 10, fiber optic slip ring, stator 13, and Profibus transmitter 2. The stator section consists of a stator 1, stator shaft 9, stator bearing 11, fiber optic slip ring, rotor 14, fiber optic chuck 7, and Profibus receiver 3. The rotor and stator sections of the Profibus photoelectric rotary transmission system rotate relative to each other via bearings. The self-collimation technology of the fiber optic slip ring 6 enables contactless rotary transmission of optical signals. The Profibus transmitter 2 in the rotor section performs electro-optic conversion of the input signal, and then transmits the optical signal through the fiber optic slip ring 6 to the Profibus receiver in the stator section. The receiver then performs photoelectric conversion of the optical signal and outputs the client signal.

[0021] It adopts fiber optic contactless rotary transmission technology and photoelectric conversion technology to convert traditional electrical contact rotary transmission into contactless optical signal rotary transmission. In the wind power pitch system, the input and output signals of the Profibus type photoelectric rotary transmission system are scrambled and descrambled through Profibus type transmitter 2 and Profibus type receiver 3. By encoding and decoding the input and output signals, the reliability and stability of the input and output signals are guaranteed. The input signal of the PROFIBUS-type photoelectric rotary transmission system used in wind pitch control systems first enters the PROFIBUS-type transmitter 2. The transmitter 2 scrambles the electrical signal, converting it into an optical signal. This optical signal is then transmitted to the PROFIBUS-type receiver 3 via the rotary transmission function of the fiber optic slip ring 6. The receiver 3 then descrambles the received optical signal, converting it back into an electrical signal for output. This significantly extends the product's lifespan, improves the working cycle of the wind pitch control system, and ensures the reliability and stability of signal transmission. The PROFIBUS-type photoelectric rotary transmission system can operate stably and reliably in wind pitch control systems for extended periods. This directly solves the problems of maintenance difficulties, short service life, and unstable / distorted signal transmission associated with ordinary conductive slip rings used in wind turbine pitch control systems under harsh environments. It can be used for extended periods in wind turbines operating under severe conditions.

Claims

1. A Profibus photoelectric rotary transmission system for a wind turbine pitch system, characterized in that: The device includes a fixed plate (1), a drive shaft (4), a bearing end cover (5), a rotor shaft (8), a stator shaft (9), a rotor bearing (10), a stator bearing (11), and a cover plate (12). The fixed plate (1) is a tubular shape with an open right end and a closed left end. A fiber optic slip ring rotor (14) hole is provided in the middle of the right side plate of the fixed plate (1). The right end of the tubular drive shaft (4) passes through the fiber optic slip ring rotor (14) hole from left to right and extends into the fixed plate (1). The rotor shaft (8) has a T-shaped cross section. The stator shaft (9) is a tubular shape with an open left end and a closed right end. The rotor shaft (8) and the stator shaft (9) are arranged side by side from left to right in the middle of the drive shaft (4).

2. The Profibus photoelectric rotary transmission system for a wind turbine pitch system according to claim 1, characterized in that: The rotor shaft (8) is installed in the middle of the transmission shaft (4) by screws. The outer wall of the left end of the rotor shaft (8) is in sliding fit with the inner wall of the middle left side of the stator (1). The outer wall of the stator shaft (9) is fixed together with the inner wall of the middle right side of the stator (1). The inner wall of the stator shaft (9) is stepped. The identical rotor bearing (10) and stator bearing (11) are sleeved side by side between the outer wall of the right end of the rotor shaft (8) and the inner wall of the left end of the stator shaft (9).

3. The Profibus photoelectric rotary transmission system for a wind turbine pitch system according to claim 2, characterized in that: The bearing end cover (5) fitted on the right end of the drive shaft (4) presses the stator shaft (9) and the rotor shaft (8) together. The cover plate (12) is fixed to the right port of the stator plate (1) by screws. The annular Profibus type transmitter (2) is fixed to the left end face of the rotor shaft (8) by screws.

4. The Profibus photoelectric rotary transmission system for a wind turbine pitch system according to claim 3, characterized in that: The fiber optic slip ring (6) includes a fiber optic slip ring stator (13) and a fiber optic slip ring rotor (14). The fiber optic slip ring stator (13) is fixed to the right end of the cavity of the drive shaft (4) by screws. The annular fiber optic chuck (7) is inserted into the fiber optic slip ring rotor (14) from right to left and covers the bearing end cover (5). The fiber optic chuck (7) is fixed to the inner right end face of the stator shaft (9) by screws. The annular Profibus receiver (3) located to the right of the fiber optic chuck (7) is fixed to the right end face of the stator shaft (9) by screws.

5. The Profibus photoelectric rotary transmission system for a wind turbine pitch system according to claim 4, characterized in that: The optical ports of the Profibus transmitter (2) and the Profibus receiver (3) are respectively connected to the optical fiber lines at both ends of the optical fiber slip ring (6). The wire of the Profibus transmitter (2) is connected to the signal generator, and the wire of the Profibus receiver (3) is connected to the signal processor.

6. The Profibus photoelectric rotary transmission system for a wind turbine pitch system according to claim 5, characterized in that: Both the cover plate (12) and the fixed plate (1) are made of Cr material with shielding function, which can isolate the influence of the external electromagnetic environment on the Profibus transmitter (2) and the Profibus receiver (3).

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