New oil coolers for large-capacity turbines produced by the ural turbine works

Results of industrial application of a new oil cooler type MB-125-165 for turbines developed at by specialists of the Ural Turbine Works are presented. Its technical specifications and design features are detailed. The results of long-term (more than 10 years) usage confirm the efficiency, reliability, and environmental safety of type MB-125-165 oil coolers.     

东方汽轮机厂风轮机设计

东方汽轮机厂是我国设计、制造大型电站汽轮机的高新技术国有骨干企业,已具备百万千瓦级超超临界火电汽轮机、百万千瓦级半转速核电汽轮机及300MW级重型燃气轮机、400MW级联合循环、1.5MW级风力发电机开发研制和批量生产的综合实力。介绍了东方汽轮机厂供应市场的两种1.5MW级风力发机的性能、设计特点以及与德国Repower公司技术合作情况。     

The modern overspeed protection system for steam turbines of the ZAO Ural Turbine Works

Approaches that the specialists of the ZAO Ural Turbine Works use in constructing and organizing the steam turbine protection system as part of the electrohydraulic control system are presented. The design and structural features of the system and its main advantages are described.     

Use of encoders to measure the position of servomotors in the electrohydraulic systems for automatic control of steam turbines produced by the ZAO Ural Turbine Works

Matters relating to the study and development of a sensor for measuring the position of a steam turbine servomotor constructed using an electrical encoder are considered. A procedure for optimizing the conversion of the servomotor piston’s linear motion into the rotating motion of its shaft is presented.     

Using the CAE technologies of engineering analysis for designing steam turbines at ZAO Ural Turbine Works

We describe the experience ZAO Ural Turbine Works specialists gained from mastering the series of CAD/CAE/CAM/PDM technologies, which are modern software tools of computer-aided engineering. We also present the results obtained from mathematical simulation of the process through which high-and intermediate-pressure rotors are heated for revealing the most thermally stressed zones, as well as the results from mathematical simulation of a new design of turbine cylinder shells for improving the maneuverability of these turbines.     

Improvement of automatic control systems for large-capacity steam turbines

We present the structures of microprocessor-based control systems we have developed for steam turbines. We also present the results from tests carried out on 300-and 800-MW power units with turbines equipped with upgraded control systems, and these results confirm that this equipment complies with the requirements the SO-CDA Standard places on selective primary control of the grid frequency.     

Main lines of the development of electrohydraulic control systems for steam turbines produced by OAO turboatom

Different design versions of the hydraulic part of electrohydraulic steam turbine control systems are considered. Their advantages and shortcomings are shown, and recommendations for their application are formulated.     

Delivery-water heaters used in cogeneration steam turbine units produced by Ural Turbine Works

The designs of horizontal delivery-water heaters used as part of steam-turbine units equipped with the cogeneration turbines developed at Ural Turbine Works are described. The design features of the apparatuses relating to the specific nature of their operation as part of combined-cycle plants equipped with cogeneration turbines are pointed out.     

Bottom steam turbines of the Ural Turbine Works

Basic design features, thermal schemes, and economic indicators of some bottom turbines that have been developed, as well as those that have partially been manufactured at the Ural Turbine Works, are presented.     

300MW汽轮机旁路系统高旁阀改造

针对湛江电厂1号汽轮机组原高旁阀存在的运行问题,实施了采用SULZER高旁阀更换原高旁阀的改造。改造后,旁路系统运行良好,机组安全性和经济性得到较大改善。     

给水泵汽轮机排汽引入冷却器热经济性分析

以300MW湿冷机组为研究对象,提出在凝结水泵后加一排汽冷却器,将小机排汽引入其中,使主机凝结水与小机排汽在该冷却器混合换热.从而减少凝汽器蒸汽负荷,提高凝汽器真空,同时减少1号低加(对应第8段抽汽)抽汽量,进而减少小机进汽量,提高机组的经济性,对电厂的节能改造具有一定的参考价值.     

600 MW机组汽轮机的寿命管理研究

阐述了汽机寿命损耗的计算模型,以北仑发电厂600MW汽轮机寿命管理为例,分析了影响汽轮机寿命的主要因素,阐明了汽轮机寿命管理的主要手段,可为机组运行优化提供指导,同时也可为其他类型汽轮机的寿命管理提供借鉴.     

700MW汽轮机安全性评价

在顺利完成广东省某两台 70 0MW进口机组电厂安全性评价的基础上 ,针对检查发现的问题 ,论述了相应的整改措施及提出的建议。一些典型问题存在共性 ,因而对相关机组的生产管理和安全性评价具有借鉴意义。对全进口机组开展安全性评价依据的标准和查评项目及评分标准进行了探讨 ,提出应针对系统和机组的具体情况 ,对一些重大影响机组安全的矛盾须做出折中考虑 ,并推荐执行行业和国家标准     

K-330-23.5 steam turbine for replacing K-300-240 turbines of KhTGZ past their lifetime

A new K-330-23.5 steam turbine is presented. It is intended both for newly constructed power engineering installations and for replacing K-300-240 turbines that have exhausted their lifetimes. It is shown that this turbine can be used when reconstructing Kharkiv Turbogenerator Works K-300-240 turbines with installation of a new unit on the existing foundation.     

Improving the performance of two-pass condensers for steam turbines

A possibility of improving the performance of a two-pass condenser is considered. A new arrangement in accordance with which a two-pass condenser is connected with respect to cooling water is analyzed, and the effect from its practical use is estimated.     

汽轮机循环参数偏差的耗差建模算法研究

为了改善汽轮机的运行经济性,建立耗差分析模型,可以将当前运行工况与基准运行工况间汽轮机热耗的偏差分解至各监控参数相应的偏差,从而为运行调整提供指导.采用等效焓降分析方法,建立了循环参数偏差的耗差模型,不仅统一了汽轮机耗差模型的建模方法,而且与传统的热力学模型算法相比,新算法具有计算工作量小、计算结果较准确等特点,是一种便于在线应用的耗差分析模型.     

Steam turbines produced by the Ural Turbine Works for combined-cycle plants

The most interesting and innovative solutions adopted in the projects of steam turbines for combined-cycle plants with capacities from 115 to 900 MW are pointed out. The development of some ideas and components from the first projects to subsequent ones is shown.     

汽轮机通流能力分析及试验研究

针对目前主流机组汽轮机实际通流能力普遍偏离设计值的现状进行分析及通流特性的试验研究,结果表明,300 MW等级汽轮机通流部分改造后其通流能力较设计值普遍偏大2％～8％,导致汽轮机缸效率偏离设计工况,汽轮机各抽汽段参数偏离设计值以及配汽不合理;600 MW等级汽轮机的通流能力较300 MW有明显改善;进口汽轮机的通流能力与设计值的偏差为0～3％,与设计值吻合较好.     

Improvement in the corrosive fatigue damage to the low-pressure steam turbine blades due to unbalanced currents

This paper presents two improved methods for the corrosive fatigue damage to the blades of low-pressure steam turbines due to corrosive operating environments and power system unbalance. Two blade materials as AISI-403 and 17-4PH are chosen into the investigation, which provides an enhanced understanding on the effect of materials to reduce the corrosion fatigue damage of blades. To verify the validity of the proposed methods, simulated results of a 951 MW operating turbine generator for the corrosive fatigue damage are presented in this paper. From the simulated results, it can be found that the corrosive fatigue damage to the low-pressure steam turbine blades is significantly reduced. In addition, the effects of unbalanced currents (I₂) on the corrosive fatigue damage to the steam turbine blades are estimated when turbine generators operate in various stress concentration factors and corrosive conditions. The estimations may provide with the safe operating standard on the new or designed generator sets under corrosive environments.