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东雷抽黄灌区,东雷和新民二级抽水站安装功率8000千瓦,转速750转/分的卧式电机水泵机组各两台,南乌牛二级抽水站安装四台。对大功率低转速机组,如何防止或减轻基础及整个厂房的振动是设计中遇到的一个主要问题。8000千瓦卧式抽水机组是国内功率最大的机组,而且还必须安装在黄河滩的砂质粉土地基上。设计无先例可循,主要参考转速、功率相差不多的调相机组基础的设计经验。(一)设计依据和标准主机基础按《动力机器基础设计规范》进行设计.采用“动基床反力法”,将地基看作有阻尼的弹簧,将主机基础看作是放在弹簧上的质点,则整个主机基础和地基就是质量——弹簧——阻尼体系。地基的弹性系
Donglei pumping yellow irrigation area, Donglei and Xinmin two pumping stations installed power of 8000 kilowatts, the speed of 750 rev / min horizontal motor pump units each two, South Wuyou two pumping stations installed four. For high-power low-speed units, how to prevent or reduce the vibration of the foundation and the entire plant is one of the major problems encountered in the design. The 8,000-kilowatt horizontal pumping unit is the most powerful unit in the country and must be installed on sandy silt subsoil of the Yellow River Beach. No precedent for the design to follow, the main reference speed, power almost the same phase of the camera group based design experience. (A) design basis and standard host based on “dynamic machine foundation design specifications.” The use of “dynamic bed reaction method”, the foundation as a damping spring, the host foundation as a spring Quality points, then the entire host foundation and foundation is the quality - spring - damping system. The elasticity of the foundation