论文部分内容阅读
本文将高炉大钟拉杆吊挂系统简化为两个自由度振动问题,并考虑了拉杆的质量,通过理论分析确定了该系统的两阶固有频率和固有振型。又根据运动初始条件定出两阶主振型的振幅及相角,为拉杆,碟簧等构件疲劳强度计算提供了应力参量。通过这一理论分析得知,为降低大钟拉杆动应力,应设缓冲弹簧。为降低碟簧、拉杆应力幅值,在工艺允许的条件下应尽可能降低关钟力、放慢关钟的末速度。
In this paper, the blast furnace bell pull-rod suspension system is simplified to two degrees of freedom vibration problem, and the rod quality is considered. The two-order natural frequency and natural mode of the system are determined by theoretical analysis. According to the initial conditions of motion, the amplitude and phase angle of the second order main mode are determined, which provides the stress parameters for the calculation of the fatigue strength of the rod, disc spring and other components. Through this theoretical analysis, we know that, in order to reduce the dynamic stress of the pull rod, a buffer spring should be set. To reduce the disc spring, rod stress amplitude, under the conditions allowed by the process should be as low as possible to turn off the clock, slowing down the end of the clock speed.