摘要
离心压缩机的性能往往由其转速决定,由于大型设备转子的转动惯量很大,在启动和停机过程中,转速的变化也会因机组的性能受到影响,并影响其扭矩和功率。为了建立大型转子停机过程扭矩变化规律,本文针对离心叶轮建立了考虑工质气动力矩、轴承摩擦力矩的转子转速变化模型。通过测试带出口气罐的离心风机系统气动参数变化,得到风机转子在不同初始转速下惰走曲线和带转子反转情况下转速变化规律。根据模型计算得到的转速数据与实验得到的转速数据比较吻合,可为抑制大型离心压缩机转子反转提供技术依据。
The performance of centrifugal compressor is generally affected by its rotating speed. In the start-up and shutdown process, the rotating speed will also be affected by the aerodynamic performance of the turbomachinery due to its large moment of inertia of the rotating equipment. Furthermore, it also has influenced on its torque and power. In order to set up the regular pattern of the moment of large centrifugal compressor, the theoretical expression of pneumatic moment and friction torque was determined to set up the mathematical rotating speed model of the centrifugal compressor. The experimental data were tested to obtain the idling rotating curve under different initial rotating speed and reverse rotating speed variation. The theoretical analysis was in agreement with the test data. Therefore, it could be used to provide some techniques to avoid the reverse rotation.
出处
《风机技术》
2015年第2期15-19,25,共6页
Chinese Journal of Turbomachinery
基金
国家自然科学基金资助项目(51276108)
关键词
离心叶轮
摩擦力矩
气动力矩
抑制反转
惰走性质
centrifugal impeller
friction torque
pneumatic moment
reverse rotation
idling rotating characteristics
