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一、前言抽汽式汽轮机的调节自整性,以往都是在额定抽汽压力下计算的。然而在抽汽式汽轮机的设计规范中,除了规定额定抽汽压力外,还规定了抽汽压力的允许变化范围。例如,双抽汽5万千瓦机组设计规范规定:工业抽汽额定压力为10大气压,其允许变化范围为8—13大气压,采暖抽汽额定压力为1.2大气压,其允许变化范围为0.7—2.5大气压。显然这意味着抽汽式汽轮机不仅可以在额定抽汽压力下运行,也允许在设计规
First, the introduction Extraction steam turbine regulation self-regulation, in the past are calculated under the rated extraction pressure. However, in the steam turbine design specifications, in addition to the provisions of the rated extraction pressure, but also provides the extraction pressure allowable range. For example, the design specification of a double extraction steam generating unit of 50,000 MW requires that the rated pressure of the industrial extraction steam is 10 atm, the allowable variation range is 8 to 13 atm, and the heating extraction rated pressure is 1.2 atm, and the allowable variation range is 0.7 to 2.5 atm . Obviously this means that the extraction steam turbine can operate not only at the rated extraction pressure, but also in the design rules