提出了一种汽轮机功率背压特性(即微增出力)的通用计算方法,该方法有两大特点:一是简单,只需知道低压排汽面积和排汽流量即可;二是精确,与运行或试验数据相比,误差仅在0.3%以内。具体介绍了计算方法的原理及分析各种假定可能引起的误差。 A general method for calculating the power backpressure (ie, slightly increased output) of steam turbines is proposed. The method has two major characteristics: first, it is simple, and only needs to know the area of ​​low pressure steam exhaust and the flow rate of exhaust steam. Second, Compared to run or test data, the error is only within 0.3%. The principle of the calculation method is introduced in detail and the possible errors caused by various assumptions are analyzed.