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宣化钢铁公司第一炼铁厂风机房安装有四台型号为D700—21透平鼓风机和两台型号为7—29—12轴流通风机。风机、电机、变速箱的噪声及风机进风口、排风口的噪声如表1所示。 一、建造隔声操作室, 使风机工不受噪声危害 机房内的噪声主要来源于: 1.风机噪声——送风管路内的气动噪声通过机壳向外辐射的噪声、风机本身产生的涡流噪声和机壳振动产生的机械噪声。 2.电机噪声——散热片产生的气流噪声、轴承产生的机械噪声和电机的电磁噪
The first ironworks of Xuanhua Iron and Steel Company wind turbine room installed four models for the D700-21 turbine blower and two models for the 7-29-12 axial fan. Fan, motor, gearbox noise and fan inlet, exhaust port noise shown in Table 1. First, the construction of sound-insulated operation room so that the fan work from noise The noise in the machine room mainly comes from: 1. Fan noise - air supply pipe noise emitted by the enclosure outward noise generated by the fan itself Eddy noise and mechanical noise generated by the chassis vibration. 2. Motor noise - air flow noise generated by the heat sink, mechanical noise generated by the bearing, and electromagnetic noise of the motor