NK型凝汽式汽轮机调节系统的设计

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摘 要 
调节系统有全液压式，WOODWARD 机械液压式及由微机控制的电液调节系统等多种调节系统，一般根据参数对系统功能及由自控水平的要求进行合理的选择和配置。 
随着电力工业的发展，200MW机组已成为电网的调峰机组，其负荷适应能力及响应速度的快慢便显得越来越重要，过去，国产200MW机组控制普遍采用传统的液压控制系统，此类系统结构复杂，控制精度低，可靠性差，传动速度慢，已远远满足不了电网调度自动化的要求。而电液调节系统越来越受重视。  [资料来源：THINK58.com]
本设计对凝汽式汽轮机调节系统的选用﹑原理进行了研究，选择了电液调节系统，介绍了其工作原理，完成各部件设计，配汽采用喷嘴调节法。调节气阀的启闭由油动机通过横梁﹑两阀杆和杠杆系统进行控制。 
在调节系统设计中，除了相应的液压部件控制外，还有转速控制系统、安全保护系统、就地操作、超速跳闸装置等。备有转速、新汽压力、抽汽压力等保安装置，上述各参数的测量、变换、执行等元件可采用气动或电动单元。随着分散控制系统技术水平的不断提高，一个电厂由单一类型的分散控制系统来完成所有控制任务是未来的发展趋势。 

关键词 汽轮机；凝汽式汽轮机；调节系统；电液调节系统 
ABSTRACT
Various govering type,such as full-hydraulic governing system.WOODWARD mechanicalhydraulic governing system and computer control elect-hydraulic govering system,can be reasonably selected and configurated depending on the system function and automatic control level that custemers required. [资料来源：THINK58.com]
power industry, the 200 MW machine set has become the charged barbed wire net to adjust the Along with the development of the electric machine set, it carries the ability of adapt and responds to the rate of speed of the speed and then seem to be more and more important, past, the domestic 200 MW machine set controls the traditional liquid of widespread adoption to press to control the system, this kind of system structure complications, the control accuracy is low, the credibility is bad, spreading to move the speed slow, already far far satisfy not the charged barbed wire net adjusts the request of one degree automation.But the electricity liquid regulate the system to be more and more value.
Have study appies and pricles of steam turbines .In general the nozzle control is adopted.The openning and closing of the governing and closing of the governing valves are controlled by an oil servomotor via a beam,two spindles and a level system.
in govering,have speed control system WOOD505、protection、local control panel 、protection Equipment and so on. [来源：http://think58.com]
Turbines are equipped with safety devices for pressure,live steam pressure,extraction steam pressure vacuum,axial displacement of rotor,and the monitoring devices for speed,vibration,temperation,pressure etc.
Along with dispersion continuously raise of the control system technique level, a power station is controled the system by the dispersion of the one type to complete all control mission and is a future development trend.

Key words turbines；steam turbines ；govering ；computer elect-hydraulic govering system

[资料来源：http://think58.com]

 目 录 
1 概述 1
1.1调节系统简介 1
1.3液压调节系统 2
1.3电液调节系统 2
2 总体设计 3 [版权所有：http://think58.com]
2.1凝汽式汽轮机选型计算 3
2.2调节系统的选用 4
2.3具体的设计 5
2.4汽轮机数字电液控制系统DEH 5
3速关组件的设计 10
4启动调节器的设计 11
5速关阀的设计 17
6 505调节器 19
7 其他相关部件 32 [来源：http://www.think58.com]
8静态校核 32
8.1静态特性 33
8..2感应机构的迟缓率 33
8..3速度变化率 33
8. 4调节汽阀的重叠度 34
1．调节汽阀顺序开始时，应有适当的重叠度； 34
参考文献 36
致 谢 37 [资料来源：THINK58.com]
汽轮机调节系统 40

1 概述 
1.1调节系统简介 
汽轮机是将蒸汽能转化为机械能的外燃回转式原动机。它具有单机功率大，转速高,效率高,运转稳和，使用寿命长等优点，因而在现代工业中得到了广泛的应用。 电网将发电厂生产的电能源源不断地输送到各个用电设备，为人们的生产、生活服务。而为保证各种用电设备能正常运转，不但要求提供连续不断的电能，而且还对供电的品质提出了严格的要求： 
频率误差≤±0.4%
电压误差≤±6%www.rdlm.com.cn)B7r ~E i#^1g n `

[资料来源：http://THINK58.com]

[来源：http://www.think58.com]