【摘要】 本文以降低机器噪声为目的,试验研究了曲柄式压力机在不同运转状态下的噪声特性.在运用自回归谱分析方法处理和分析机床原始状态的噪声信号和振动信号的基础上,明确了机床的激振源和噪声源.据此,提出了确定的降噪途径和措施,并在机床现有结构和制造的条件下,采用了减振降噪装置,从而有效地降低了机床的噪声.试验验证的结果表明,机床原始噪声谱中主要频率的噪声功率谱密度都得到了明显的抑制,机床的噪声量级也达到了我国现行锻压机床噪声标准中的一级品水平.更多还原

【Abstract】 With the purpose of reduction of the levels of machine noise, this paper describes the experimental investigation on the noise characteristics of a crank type press under different running conditions. By applying the auto-regressive spectrum method to processing and analysing the signals of machine noises and viberations, it has been possible to defect the exciting sources and the noise sources of the machine. According to above investigation some definite ways and measures to reduce the machine noise were given and under the existing structure and manufacturing conditions vibration dampers were used on the press so that the machine noise is effectively reduced. Testing results show that the principle spectrum peaks of the original machine noise power spectrum density have been distinctly supressed and the noise index of the press has come up to that of the 1st grade product according to the Chinese Forging Machine Testing Standard JB1646-76.更多还原