摘要
针对罗茨鼓风机振动噪声问题,将风机结构简化为转子、轴承、箱体、隔振器支撑、弹性基础等五个子结构,建立一种简化的空间柔性耦合动力学方程。采用子结构传递矩阵法推导各子系统动态传递矩阵及功率流的表达式;从结构噪声能量传输角度出发,分析了轴承刚度、箱体质量等结构参数变化对风机功率流传递性能的影响。结果表明:减小轴承的刚度,会降低输入到箱体的功率流;通过增加箱体质量,可以降低振动。此结果为具有双转子壳类机器的结构优化与动态设计提供理论基础。
In this paper, in allusion to the vibration noise problems of Roots blower, a simplified dynamics model is set up which consists of five sub-structures such as rotor, bearing, box, vibration isolator and flexible foundation, and then a spatial flexible coupled dynamics model is established so as to obtain the dynamic transfer matrix and power flower expression by using transfer matrix method. In the aspects of the structure noise energy, influence of structural parameters included bearing stiffness and box mass have a very great impact on the power flow transmission performance of Root blower. Theoretical basis may be provided for the structural optimization and dynamic design of double rotor shell machines.
出处
《应用力学学报》
CAS
CSCD
北大核心
2016年第4期714-719,745,共6页
Chinese Journal of Applied Mechanics
基金
山东省自然科学基金(Y2006F38)
中国煤炭工业协会科学技术研究指导性计划项目(2015)
关键词
动力学
罗茨风机
双转子
传递矩阵
功率流
dynamics
Roots blower
dual rotor
transfer matrix
power flow