【作者】 李新；

【导师】 彭佑多； 王旻晖；

【作者基本信息】 湖南科技大学 ， 机械工程， 2011， 硕士

【摘要】 液压提升机因具有体积小、结构紧凑、安装灵活、操作简单及良好的防爆性能与恒扭矩输出等优点而广泛应用于矿山,且绝大多数安装于井下硐室之中,是提升矿石、物料和人员的主要设备。但液压提升机在运转过程中产生的噪声强度大、声级高,并且噪声频带宽、频谱复杂,在五面封闭的硐室中,噪声反射能力强,衰减缓慢,严重威胁着提升司机的身心健康,甚至掩盖安全警报信号而导致重大事故的发生。因此开展提升机硐室噪声预测与控制的研究对建设安静矿山、安全矿山有重大的现实意义。本论文分析了液压提升机及其硐室环境下的噪声源特性和噪声声场环境特点,开展了井下硐室噪声环境现场测试和数据处理分析;基于统计能量分析方法,划分了整个液压提升机硐室系统的子系统和模态群,通过数值计算和试验研究获得了各个子系统统计能量分析的模态密度、内损耗因子、耦合损耗因子和输入功率等参数;应用声学分析软件VA One仿真分析了整个系统的噪声振动特性,从而揭示了液压提升机及硐室噪声场特性,噪声传播规律与能量传递特性;从硐室的几何结构,形状尺寸、阻尼和声学特性等方面,探讨了液压提升机硐室噪声控制的途径和方法,为液压提升机井下硐室环境噪声治理提供依据。更多还原

【Abstract】 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.更多还原