摘要
针对往复式压缩机造成管路振动的问题,采用API 618标准中规定的方法对往复式压缩机排气管路进行了振动分析。首先采用Bentley PULS软件对排气管路进行声学模拟,计算了往复式压缩机工作状态下排气管路中的脉动压力不均匀度和声学激振力。根据计算结果,在缓冲罐管口增设孔板对压力不均匀度进行了抑制以满足API 618标准的要求。然后采用AutoPipe软件计算排气管路在声学激振力作用下的动态响应,计算了排气管路中的交变应力、振动位移(峰-峰)和振动速度,并将计算结果与API 618中规定的控制限值进行了比较。计算结果表明,双缸双作用往复式压缩机前两阶激发频率下排气管路中的脉动压力不均匀度最大,增设孔板可有效降低排气管路内的压力脉动不均匀度,并进一步降低管路振动风险。
With respect tothe problem of pipeline vibrationcaused by reciprocating compressor,the approach provided in API 618 was adopted for the vibration analysis of the discharge pipeline.First,acoustic simulation was carried out for the discharge pipelineby use of software Bentley PULS.The non-uniformity of pulsating pressure and induced acoustic shaking forces in the discharge pipeline were computed when the reciprocating compressor was in working condition.Based on the calculation results,orifices were added at the nozzle of pulsation damper to suppress the pressure non-uniformity and meet the requirements in API 618.Then the dynamic response of the discharge pipeline was calculated under the action of acoustic shaking force by use of software AutoPipe.The cyclic stress,dynamic displacement(pk-pk)and vibration velocity were obtained from the computation and compared with the control limit in API 618.The calculation results indicated that the first two excitation frequency caused the maximum pressure non-uniformity in the discharge pipeline for double-acting reciprocating compressor with double cylinders.The settlement of orifice plates could effectively reduce the pressure non-uniformity in the pipeline,and then furtherreduce the vibration risk of the discharge pipeline.
作者
季龙庆
程强
刘洪佳
曾兆强
Ji Longqing;Cheng Qiang;Liu Hongjia;Zeng Zhaoqiang(CNOOC Petrochemical Engineering Co.,Ltd,Jinan 250101,China)
出处
《化工设备与管道》
CAS
2020年第4期66-70,共5页
Process Equipment & Piping
关键词
往复式压缩机
振动分析
声学模拟
排气管路
reciprocating compressor
vibration analysis
acoustic simulation
discharge pipeline
