中俄东线离心压缩机管嘴受力校核优化

中国石油天然气管道工程有限公司

中俄东线;离心压缩机;管嘴受力;校核优化;CAESAR II

Check and optimization of stress on nozzle of centrifugal compressor in China-Russia Eastern Gas Pipeline
ZHOU Yan, XU Jingyu, HE Chunlei, TIAN Yu, YUAN Lin, SUN Fengrui, LIU Liang

China Petroleum Pipeline Engineering Corporation

China-Russia Eastern Gas Pipeline, centrifugal compressor, stress on nozzle, check and optimization,

备注

离心压缩机系统被誉为输气站场的心脏。为了应对大口径、高压力、高温差的压缩机设计趋势,满足国产压缩机管嘴允许受力偏小的要求,应对管嘴受力校核进行优化。依据API 617-2014《轴流、离心压缩机和膨胀压缩机》中的压缩机管嘴受力校核要求,在初始配管安装方案的基础上,采用管道应力分析专用软件CAESAR II,建立了某输气站压缩机区应力分析模型。分析了自然补偿设置、管支架类型与位置对压缩机组管嘴x 、y 、z 方向受力的影响,并进行管嘴受力校核优化。结果 表明:管嘴x 、y 、z 方向受力是影响管嘴受力的关键因素,通过增加合理的自然补偿和管支架类型,形成了降低压缩机管嘴x 、y 、z 方向受力的关键技术优化方案,离心压缩机管嘴受力明显变小。基于中俄东线某输气站的应力优化方案,可适用于不同直径的压缩机进出口管嘴受力校核。研究结果对于降低压缩机管嘴受力、提高压缩机运行安全、提高离心压缩机系统应力分析水平、提升设计效率具有十分重要的意义。(图3表7,参[20]

Centrifugal compressor system is known as the heart of a gas transmission station. To adapt to the design trend of compressor with large diameter, high pressure and high temperature difference, and to meet the requirement for smaller allowable stress on nozzle of domestic compressor, it is necessary to optimize the stress check of nozzle. The stress analysis model for compressor area in a gas transmission station was built using pipeline stress analysis special software CAESAR II based on initial piping installation scheme and the stress check requirement of compressor nozzle in Axial and centrifugal compressors and expander-compressors (API 617-2014). The influence of natural compensation setting, type and position of pipe support on the stress of compressor nozzle in x , y and z directions was analyzed by the model, and the stress on nozzle was checked and optimized. The research shows that the stress in x , y and z directions of the nozzle was the key factor affecting the stress on nozzle. By increasing reasonable natural compensation and the type of pipe support, the key technical optimization scheme for reducing the stress in x , y and z directions of the compressor nozzle was proposed to significantly reduce the stress on nozzle of the centrifugal compressor. The stress optimization scheme based on one gas transmission station in China-Russia Eastern Gas Pipeline can be applied to the stress check of inlet and outlet nozzles of compressors with different diameters. The research is of great significance for reducing stress on the compressor nozzle, enhancing the operation safety of the compressor, improving the stress analysis level of the centrifugal compressor system, and raising the design efficiency. (3 Figures, 7 Tables, 20 References)