1000MW汽轮机转子的动平衡研究

1000 MW汽轮机组是我公司近年来的重要标志性产品之一。由于该汽轮机属公司首台产品,而且低压转子质量大、跨距长、平衡要求精度高,所以高速动平衡试验成为一个重点也是难点。文中就1 000 MW汽轮机低压转子平衡数据进行分析,并研究结果及计算方法供同行借鉴、参考。     

国产1000MW超超临界机组转子的冷却系统

转子冷却系统是有效防止转子热疲劳,提高转子材料使用等级的重要装置。重点分析了国产1 000MW超超临界汽轮机的高中压转子的冷却系统及其特点,以期为现场技术人员提供参考。     

焊接转子1000MW国产核电汽轮机的结构与发展

对某型焊接转子1 000MW国产核电汽轮机的技术特点进行了详细的分析和论述,重点介绍核电汽轮机焊接转子、解决湿蒸汽水蚀的特殊结构和思路,以及国产化发展前景。     

1000MW超超临界汽轮机低压转子国产化加工工艺研究

介绍了1000MW超超临界汽轮机机组低压转子的结构特点与加工工艺方法等,对关键工艺过程、加工难点及解决方案做了详细阐述.为我厂百万等级汽轮机转子的加工积累了大量经验,对类似结构的产品国产化制造具有借鉴意义.     

Conceptual design of coupled nonequilibrium disk MHD generator and superconducting magnet system

The authors propose a new conceptual design method for a coupled nonequilibrium disk MHD generator and superconducting magnet system. At first, a generator with constant magnetic flux density is conceptually designed by using the new generator design method recently developed by the authors, and several superconducting magnets suitable for the generator are conceptually designed. Next, considering the obtained magnetic flux density distribution of each magnet, the design calculation of the generator is performed again, and the specifications of the generator are corrected. From the obtained coupled systems, the optimum system is finally selected through synthetical consideration of various requirements. The procedure of the proposed method is very simple, and no iterative calculation is contained in the correction process. Incorporating the new generator design method makes this advantage possible because the generator size can be fixed in the correction process. In the conventional method, a change of magnetic flux density distribution leads directly to a change in the generator size, and therefore, design calculations of the generator and magnet should be iterated in the correction process until they converge to consistent sizes. The procedure of the new conceptual design method is explained in detail by taking the case of a supersonic generator with a caesium seeded helium plasma and 100 MW thermal input.     

1000MW汽轮机低压转子轮槽成形铣刀加工性能研究

采用成形铣刀加工1000MW汽轮机低压转子末级轮槽,通过对26NiCrMoV145转子钢材料切屑的形成情况、刀具磨损形貌以及加工后材料表面残余应力大小的分析,研究成型铣刀的加工性能。结果表明:材料的切屑以带状切屑为主;粗刀以刀刃处边界磨损居多,而半精刀以前刀面损伤更为突出;加工表面残余应力多为残余压应力。     

1000MW机组叶片冲蚀补焊引发低压转子振动问题的分析及处理

大容量火电机组在调峰过程中,时常由于动、静间隙消失引起振动故障,同时低负荷运行会引起叶片加重的冲蚀现象.然而现有处理方案往往采用补焊工艺,容易出现质量分布不均的问题.对此,本文针对补焊工艺后低压转子在一阶临界转速及定转速时分别出现的振动问题,进行了原因分析,分别对低压Ⅰ、Ⅱ转子进行重新配重.通过在不同工况下的测试结果表明,机组振动明显改善.本文为大容量机组深度调峰可能出现的低压转子振动问题的准确诊断及快速治理提供了参考经验.     

兆瓦风力发电机系统可靠性设计理论研究

在分析兆瓦风力发电机系统的基础上,提出了兆瓦风力发电机发电系统可靠度的基本概念及计算方法,建立了可靠度最优分配的数学模型及最优兆瓦风机发电系统可靠性设计的数学模型。     

1000MW汽轮机精加工转子轴颈微弧等离子堆焊研究

1000MW精加工后需在轴颈部位大面积堆焊1．25Cr-0．5Mo材料,经过大量试验研究,成功开发了微弧等离子堆焊。严格控制其热输入量,采用小参数多层多道堆焊,制订了转子堆焊操作指导书,并在甜艮高、中压转子上成功实施,焊接质量及变形量均达设计要求。     

1000MW二次再热机组优化配置

介绍了国内外超超临界机组的发展状况,由于机组参数的提高受当前材料发展的限制,因此二次再热机组被关注。通过介绍二次再热机组与一次再热机组的区别、国内各大主机设备制造厂二次再热主机的特点,提出机组配置的建议,为机组选型提供参考。     

1000MW超超临界机组300MW调峰探索研究

由于电网供电形势的变化,对燃煤发电机组的调峰需求加剧,目前华东电网1000MW机组40％额定出力调峰已进入常态化,但仍无法满足电网的调峰需求,本文就某1000MW机组30％额定出力调峰试验期间出现的一些异常进行了深入分析总结,并提出了相应的处理措施和改进建议,保证深度调峰期间机组安全稳定运行.可为类似机组深度调峰期间运...     

1000MW超超临界二次再热锅炉系统■分析

针对国内某1 000 MW超超临界二次再热机组锅炉,进行了不同负荷下锅炉系统的性能研究,构建机组模型并进行仿真模拟。根据■平衡方程,计算了不同负荷下锅炉系统及各部件的■损失和■效率。结果表明:随着负荷的变化,各部件都保持较高的■效率且波动很小,能够保证机组的深度调峰和低负荷稳定运行;燃料燃烧与换热产生的■损失之和占总体■损失的97%,减小工质与高温烟气的传热温差可降低■损失。     

1000 MW ultra-supercritical turbine steam parameter optimization

The 2 × 1000 MW ultra-supercritical steam turbine of Shanghai Waigaoqiao Phase III project, which uses grid frequency regulation and overload control through an overload valve, is manufactured by Shanghai Turbine Company using Siemens technology. Through optimization, the steam pressure is regarded as the criterion between constant pressure and sliding pressure operation. At high circulating water temperature, the turbine overload valve is kept closed when the unit load is lower than 1000 MW while at other circulating water temperatures the turbine can run in sliding pressure operation when the unit load is higher than 1000 MW and the pressure is lower than 27 MPa This increases the unit operation efficiency. The 3D bending technology in the critical piping helps to reduce the project investment and minimize the reheat system pressure drop which improves the unit operation efficiency and safety. By choosing lower circulating water design temperature and by setting the individual Boiler Feedwater Turbine condenser to reduce the exhaust steam flow and the heat load to the main condenser, the unit average back pressure and the terminal temperature difference are minimized. Therefore, the unit heat efficiency is increased.     

200MW汽轮机转子泊松效应的参数识别

采用一种信号分离的方法,对200MW汽轮机转子泊松效应的参数进行了识别,分析了其物理机理,给出了最终的识别结果,对预测汽轮机差胀有参考价值。     

1000MW超超临界机组汽轮机DEH调试简介

介绍了上海汽轮机厂超超临界1000MW汽轮机控制系统的启动调试,尤其是油动机阀门的参数调整及机组的启动过程的调试.     

1000 MW ultra-supercritical turbine steam parameter optimization

The 2×1000 MW ultra-supercritical steam turbine of Shanghai Waigaoqiao Phase III project, which uses grid frequency regulation and overload control through an overload valve, is manufactured by Shanghai Turbine Company using Siemens technology. Through optimization, the steam pressure is regarded as the criterion between constant pressure and sliding pressure operation. At high circulating water temperature, the turbine overload valve is kept closed when the unit load is lower than 1000 MW while at other circulating water temperatures the turbine can run in sliding pressure operation when the unit load is higher than 1000 MW and the pressure is lower than 27 MPa This increases the unit operation efficiency. The 3D bending technology in the critical piping helps to reduce the project investment and minimize the reheat system pressure drop which improves the unit operation efficiency and safety. By choosing lower circulating water design temperature and by setting the individual Boiler Feedwater Turbine condenser to reduce the exhaust steam flow and the heat load to the main condenser, the unit average back pressure and the terminal temperature difference are minimized. Therefore, the unit heat efficiency is increased. __________ Translated from Journal of Power Engineering, 2007, 27(3): 305–309, 331 [译自 : 动力工程]     

1000MW塔式炉钢结构的设计

介绍了1 000 MW塔式锅炉钢结构的主要特点及塔式锅炉钢结构与1 000 MWⅡ型锅炉钢结构在整体布置上的差异;通过较详细论述了1 000 MW塔式锅炉钢结构各组成部分的布置特点和功能;另外,结合外高桥3期具体工程,较详细介绍塔式锅炉钢结构设计、制造和安装过程中的部分技术问题,指出如地脚螺栓的设计特点及优点、主立柱的...     

1 000 MW 超超临界锅炉燃烧优化调整

介绍了某电厂1000Mw超超临界锅炉的设计特点和燃烧优化调整方法、结果和经验.通过调整燃烧器的风粉均衡,改进磨煤机分离器回粉阀结构,优化燃烧器配风和省煤器出口氧量,锅炉效率可以达到94.43%,NOx排放浓度达到297mg/Nm3左右.     

超超临界1000MW机组的热经济性分析和(火用)分析

构建了超超临界火电机组的热经济性分析和(火用)分析数学模型,并对某台超超临界1 000MW机组开展了热经济性和(火用)分析,该机组全厂热效率为45.75％,而(火用)效率为44.64％.汽轮机高压缸、中压缸、低压缸的(火用)效率分别为94.83％,96.76％和89.82％,均高于其相对内效率.此外,探讨了提高机组节能潜力的措施.     

1000MW级核主泵内部非定常流动特性

为了对1000 MW核主泵内部流场进行深入分析,应用商业计算软件CFD对核主泵进行了非定常数值模拟,得到主泵内部压力脉动特性。结果表明:核主泵内部压力脉动呈现周期性变化,叶轮叶片对流体的影响频率为转频f=24.2 Hz的整数倍及其谐波;在叶轮内脉动幅度从叶片前缘到后缘逐渐增加,而在导叶内从叶片前缘到后后缘逐渐减小,在泵壳内变化相对较小;不同工况下,脉动幅值在额定工况下最小,在小流量工况时最大,并且偏离额定流量越多,压力脉动越严重。