某型涡轮轴发动机慢车转速故障分析

某高原型直升机所装用的发动机在起动过程中出现压气机涡轮转速不能自动加速进入慢车状态,压气机涡轮转速悬挂在慢车状态以下,应急关停发动机起动不成功的故障。通过对起动程序、燃油控制和温度校正原理的分析,得出该故障的产生原因为温度校正器感温筒失效,可通过更换感温筒来排除该故障。

Analysis of Idling Rating Fault of a Turbboshaft Engine

From the perspective of helicopter outfield maintenance,this paper describes the failure of a certain type of engine installed in a plateau helicopter in the starting process.That is,the turbine speed of the compressor cannot automatically accelerate into the idling rating,causing the engine’shut down in emergency and its failure to start with speed suspension.Through the analysis of the starting program,fuel control and temperature correction principle,it is concluded that the cause for this fault is the malfunction of a temperature corrector’temperature sensing tube,which can be eliminated by replacing temperature sensing tube.