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在我国,安装于大、中型热力发电厂的高压背压式汽轮机,单机容量一般为2.5万千瓦至5万千瓦,这些在背压式汽轮机中要算是大型的了。它发出的电能输入电力网,汽轮机的排汽则送入热网供附近工业区使用。这种背压机调节系统的型式与中、小型机有所不同,构造也稍复杂一些,但调节原理及其动、静态特性与中、低压背压机是相似的,只要熟悉了其构造,我们不难掌握其使用、调整方法。本章举一般常用的B25-95/15-2型(上海汽轮机厂生产)背压式汽轮机为例来阐述。
In China, installed in large and medium-sized high-pressure thermal power plant back-pressure steam turbine, stand-alone capacity is generally 25,000 to 50,000 kilowatts, which in the back-pressure turbine to be considered large. The power it sends into the power grid, steam turbine exhaust steam into the network for the use of nearby industrial areas. This type of back pressure regulator system is different from the medium and small machines, the structure is also slightly more complicated, but the adjustment principle and its dynamic and static characteristics and medium and low pressure back-pressure machine is similar, as long as its familiar with the structure, We do not difficult to grasp its use, adjustment method. This chapter describes the commonly used B25-95 / 15-2 (Shanghai Steam Turbine Factory) back pressure steam turbine as an example to illustrate.