Electric vibration exciter and implementation method thereof

Abstract

The embodiment of the invention relates to the field of excitation technology of rotating machinery, and discloses an electric vibration exciter, comprising: a shaft system vibration measurement structure used for measuring a torsional vibration signal of a shaft system in real time; a torsional vibration exciter used for generating excitation, and comprising a magnetic force module and a coil module, wherein the coil module comprises a core body and a conductive coil wound and fixed on the core body, the magnetic force module comprises a magnetic field generator, the magnetic field generatoris used for generating a magnetic field capable of passing through the conductive coil, the coil module and the magnetic force module perform reciprocating rotation relative to each other under the action of the magnetic field, one of the coil module and the magnetic force module is rigidly fixed with an enclosure, and the other one of the coil module and the magnetic force module is rigidly fixedwith the shaft system; a torsional electric signal loading module used for loading a control electrical signal to the conductive coil; and a signal processing module used for obtaining the inherent frequency of the shaft system based on the torsional vibration signal and the control electrical signal. The electric vibration exciter provided by the invention not only has a relatively large outputtorque, but also has relatively high working frequency.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of vibration excitation of rotating machines, and in particular to an electric vibration exciter and its implementation method. Background technique [0002] During the operation of rotating mechanical shaft systems, torsional vibrations will occur due to fluctuations in torque loads, such as automotive and marine internal combustion engines, propeller drive systems, rotary pumps, etc. When a certain frequency component in such a dynamic load tends to be consistent with the natural torsional frequency of the shaft system structure, the shaft system may generate severe torsional resonance, which can easily lead to damage and failure of components, and at the same time radiate to the outside world. Vibration and noise intolerable to humans. Therefore, in the process of shaft system product design and development, product improvement or fault diagnosis, it is often necessary to measure it...

AI Technical Summary

Problems solved by technology

The torsional vibrator in the prior art is usually a hydraulic torsional vibrator, although it can have a large output torque, but limited by the characteristics of the liquid, the upper limit of its working frequency is only 100-150Hz

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