Impact of Different Fixing Methods on the Vibration Characteristics of Single-Phase Transformers

The vibration problem of single-phase transformers can threaten the stable operation of equipment, and long-term severe vibration may also cause mechanical fatigue or even damage to the equipment. Among these serious factors, the internal fixing method is one of the most important but easily overlooked factors, but the specific mechanism of the fixing method under different harmonics is still unclear. This article designs vibration and noise testing experiments for single-phase transformers, considering different harmonic excitations, as well as quantitatively compares and studies three different types of fixing methods: eccentric circle fixing, casting fixing, and pressure fixing. The effect of harmonic components on the vibration characteristics of single-phase transformers was studied, and the distribution characteristics of vibration and noise under different fixed methods were extracted and analyzed. The quantitative influence mechanism of fixed methods on audible noise was obtained.