【作者】 袁丁；

【导师】 马术文；

【作者基本信息】 西南交通大学 ， 机械制造及其自动化， 2019， 硕士

【摘要】 从1884年第一套汽轮发电机组的产生到现在,汽轮发电机技术经历了数次变革。随着冷却方式的改进,发电机单机容量也逐步提高,因此发电机的发展变革究其根本实际为冷却方式的革新,其先后经历了空冷、双水内冷、水氢氢冷却及全氢冷冷却等几个重要阶段。特别氢气作为冷却介质的出现对汽轮发电机的发展有着跨时代的意义,氢气以较高的换热比和较低的风摩损耗使发电机在单位体积下额定输出容量不断的迈上新的台阶。燃气发电作为国内新型发电形式,广泛被使用在沿海和经济较发达地区,以满足其用电负荷变化大的需求。当前燃气发电机均采用氢气冷却技术。本文就氢冷燃气发电机漏氢监测预防进行研究,在油密封装置设计、加工、安装的工艺和监控、漏氢处理的方法进行改进。首先,论文结合大量机组安装、运行经验和数据对油密封装配及其密封垫的设计和选材进行改进。其次,结合燃气发电机组的密封方式制定厂内测量、检查的工艺方案、并设计相关工装;再则,结合现场安装数据制定现场密封座倾斜度加工方案,从而保证机组整体气密性试验的通过及机组运行过程中的安全可靠;最后,结合多个电厂整体气密性试验和实际运行中的漏氢检查方式及出现的问题进行分析,并提供计算方式和处理办法。通过密封座厂内设计、选材和工艺方案的改进厂外倾斜度加工方案的制定,结合数十台该类型机组的实际安装结果,以上措施可以极大的降低电机由于油密封装配失效而产生的漏氢事故。另外,对现场各类型漏氢情况进行分析,提出的一系列处理方案也被证明可以快速的找到漏氢点并且及时完成处理。这不仅大大提高了机组运行的安全性、可靠性、稳定性,减少氢气的补给量可以为业主带来良好的经济效益,也为发电设备企业赢得良好的口碑,在业内树立良好的企业形象。更多还原

【Abstract】 Since the first steam turbine generator was set in 1884,the turbine generator technology has undergone several changes.With the improvement of the cooling mode,the capacity of the generator is gradually improved.Therefore,the development of the generator is fundamentally the innovation of the cooling method.It has experienced several important stages such as air cooling,double water internal cooling,water-hydrogenhydrogen cooling and all hydrogen cooling.Specially the appearance of hydrogen as a cooling medium has the cross time significance for the development of steam turbine generators.Hydrogen has a higher heat exchange ratio and lower wind and friction loss,so that the rated output capacity of the generator under unit volume is constantly rising.As a new type of domestic power generation,gas-fired power generation is widely used in coastal and economically developed areas to meet the demand for large changes in its electricity load.Current all the gas turbine generator use hydrogen cooling technology.In this paper,the research on hydrogen leakage monitoring and prevention of hydrogen-cooled gas generators is carried out,and the methods of designing,processing and installing oil seals,monitoring and leakage hydrogen treatment are improved.Firstly,the paper combines a large number of unit installation,operating experience and data to improve the design and selection of oil seal assemblies and their gaskets.Secondly,in combination with the sealing method of the gas generator set,the process plan for the measurement and inspection in the factory is formulated,and the relevant tooling is designed.In addition,the data of field installation is used to formulate the slope sealing degree processing plan to ensure the overall air tightness test of the unit and the safety and reliability of the unit operation process;Finally,combined with the overall air tightness test of multiple power plants and the inspection methods of hydrogen leakage and the problems in actual analysis,and provide calculation methods and processing methods.Through the design of the seal seat optimization in the factory,material selection and the plan to improve the inclination processing program out of the factory,combined with the actual installation results of dozens of this type of unit,the measures above can greatly reduce the motor due to the failure of the oil seal assembly that causes the hydrogen leakage accident.In addition,the analysis of various types of hydrogen leakage in the field,the series of treatments proposed have also been proved to find the hydrogen leakage point quickly and complete the treatment in time.This not only greatly improves the safety,reliability and stability of the unit operation,but also reduces the supply of hydrogen which can bring good economic benefits to the owners.It wins a good reputation for power generation equipment enterprises and establishes a good corporate image in the industry.更多还原