四烧主抽风机机壳振动及转子磨损原因分析

文章对炼铁厂四烧车间主抽风机机壳振动及叶轮中盘处磨损原因进行了分析,并通过吸风管道支撑形式的改造和采用切割中盘的方法,消除了存在的问题,从而提高了风机的运行寿命,为减轻维修工作量和安全运行的可靠性提供了保障。

加氢裂化装置往复式压缩机机壳振动的测量方式

简述了中国石化镇海炼化分公司Ⅰ套加氢裂化装置往复式新氢压缩机机壳振动的测量方式和改造过程,介绍了日常运行中的典型故障现象和处理方法,为今后的日常维护提供一定的借鉴。

振动电机壳缩陷的产生原因及防止对策

振动电机壳铸件的材质为QT400—17。生产中时常在位于上型的一个支座上产生缩陷(缩陷强度不尽相同),由此引起的铸件次品、废品率为10％～15％。前一阶段,连续两炉机壳的缩陷次品、废品率均为100％。后来,通过对造型工艺和炉前配料进行分析和现场浇注观察。找到了产生缩陷的原因并采取了相应的措施。使这一缺陷的次品、废品率降为零,从而彻底消除了这一缺陷。

关键压缩机在线振动监测技术研究

压缩机是天然气处理装置的核心设备,压缩机在线振动监测采用机壳表面振动监测、轴振动监测和压电式传感器振动监测技术,有效实现大型关键设备实时监控,确保天然气处理装置的运行时率。

CFD Simulation of Pulsation Noise in a Small Centrifugal Compressor with Volute and Resonance Tube

The rotational frequency tone noise emitted from the automobile turbocharger is called the pulsation noise. The cause of the pulsation noise is not fully understood, but is considered to be due to some manufacturing errors, which is called the mistuning. The effects of the mistuning of the impeller blade on the noise field inside the flow passage of the compressor are numerically investigated. Here, the flow passage includes the volute and duct located downstream of the compressor impeller. Our numerical approach is found to successfully capture the wavelength of the pulsation noise at given rotational speeds by the comparison with the experiments. One of the significant findings is that the noise field of the pulsation noise in the duct is highly one-dimensional although the flow fields are highly three-dimensional.