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涡喷七发动机的台架点是否符合要求是外场衡量加力性能的重要指标。当更换发动机、更换加力泵或加力工作状态不正常时,都需要测量或调整发动机的台架点。由于实际发动机的低压转子速度n_(1c)不等于100％,场温也不等于标准大气温度15℃,所以维护规程规定必须将测得的高压转子转速n_(2c)换算成竹n_1=100％、t_o=15℃时的n_(2c),即台架点。用该n_(2 c)与履历本记载的台架点原始值相比较,如降低不大于0.29％,即为正常;若降低超过0.2％,即属故障,需要调整。
Whirlpool seven engine gantry point is to meet the requirements of the external field is an important indicator of afterburner performance. When changing the engine, changing the pump or afterburner is not working properly, you need to measure or adjust the engine’s gantry. As the actual engine low pressure rotor speed n_ (1c) is not equal to 100%, the field temperature is not equal to the standard atmospheric temperature 15 ℃, so the maintenance regulations require that the measured high pressure rotor speed n_ (2c) converted into bamboo n_1 = 100% , T_o = n_ (2c) at 15 ° C, the gantry point. This n_ (2 c) is compared with the original value of the gantry point recorded in the history. If the reduction is less than 0.29%, it is normal. If it is reduced by more than 0.2%, it is faulty and needs to be adjusted.