Multi-dimensional lossless rotation-stopping optical fiber rotary connecting device and use method

Abstract

A multi-dimensional lossless rotation-stopping type optical fiber rotary connecting device comprises an upper shell, a lower shell, a static end optical fiber and a dynamic end optical fiber, the two ends of a rotation-stopping piece connected to the outer wall of the upper shell in a sleeving mode are each connected with a rotation-stopping unit, the upper shell rotates relative to the lower shell through a bearing between the shells, and the static end optical fiber is connected with the dynamic end optical fiber. The top end of the static end optical fiber penetrates through the unit metal cover and then extends to the position above the unit metal cover, the bottom end of the static end optical fiber penetrates through the upper shell and then extends to the interior of the upper shell cavity, the top end of the dynamic end optical fiber penetrates through the lower shell and then extends to the interior of the upper shell cavity, and the static end optical fiber and the dynamic end optical fiber are arranged in an up-down opposite mode. According to the design, contact type signal transmission is not adopted, optical loss is not generated, rotation stopping, especially flexible rotation stopping, can be carried out on the optical fiber at the static end, and the operation safety is improved.

Description

technical field [0001] The invention relates to an optical fiber signal transmission device, which belongs to the field of health monitoring of rotating machinery, and in particular to a multi-dimensional non-destructive stop transformation optical fiber rotary connection device and a use method. Background technique [0002] Large rotating machinery (such as steam turbines, generators, compressors, engines, etc.) is the key equipment in many industries such as petrochemical, energy, metallurgy, aviation, etc. Various mechanical failures are prone to occur during operation, and once a failure occurs, it will bring significant economic losses to the enterprise and the country. Therefore, the structural health monitoring of large rotating machinery rotors is particularly important. [0003] The signal transmission between the rotor and the stator of rotating machinery is one of the difficulties in the health monitoring of large rotating machinery structures. Most of the exist...

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Problems solved by technology

[0003] The signal transmission between the rotor and the stator of rotating machinery is one of the difficulties in the health monitoring of large rotating machinery structures. Most of the existing methods use electric slip rings, that is, the electric slip rings transmit signals through carbon brushes close to the copper rings, but this kind of The technology belongs to contact signal transmission, which needs to experience a lot of friction during application, which will not only cause loss, but also easily generate a large amount of carbon alloy powder during the friction process, resulting in the need for regular cleaning or replacement of carbon brushes, which is troublesome in application and high in cost. In addition, electric slip rings also have defects such as narrow bandwidth, poor real-time performance, poor electromagnetic compatibility, and easy generation of electric sparks.

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