Noise Prediction And Analysis Of Hydraulic Hoist Chamber Based On The Statistical Energy Analysis

The hydraulic hoist that mainly installed in underground chamber has these advantages of small volume, compact structure, flexible installation , simple operation , good performance of the explosion-proof housing and constant torque output , is widely used in mining as the key equipment to raise the ore, materials and person. While high strength, loud sound level, wide frequency band and complicated spectrum are caused in the running process of hydraulic hoist, and also strong reflecting capacity, slow attenuating sound are appeared in the closed five chamber, which have serious threat to the physical and mental health of lifting driver, even cause security warning singal covered and lead to significant accident. Therefore, research on the forecast and control of sound in lifting chamber has a great significance for the construction of quiet and security mine.Noise sources and noise field characteristics in hydraulic lifting and related chamber environment are analyzed, experimental tests and data analysis of noise enviment in underground chamber are developed. Subsystem and modal group of the whole hydraulic lifting system are divided based on statistical energy analysis method, parameters about modal density, inner loss factor, coupling loss factor and input power of statistical energy analysis in each subsystem are obtained by adopting numerical calculation and experimental study. Noise and vibration characteristics of the whole system are analyzed by VAOne, which reveal noise field characteristic, noise spread law and energy transmission characteristic of hydraulic lifting and its chamber. Noise control means and methods of hydraulic lifting chamber are discussed in geometric structures, size and shape of damping and acoustic characteristics, which provide reference for noise reduction of underground chamber in hydraulic lifting.