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| Fault Analysis of Gas Turbine Speed Jump in a Certain Type of Turboshaft Engine |
| Received:January 23, 2024 Revised:May 08, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.07.012 |
| KeyWord:gas turbine speed turboshaft engine speed sensor speed jump transmission gear helicopter |
| Author | Institution |
| SONG Yuhang |
PLA 91331 Unit, Liaoning Huludao , China |
| FAN Jianlou |
PLA 91331 Unit, Liaoning Huludao , China |
| MENG Qingxiao |
PLA 91331 Unit, Liaoning Huludao , China |
| FAN Weijie |
Naval Aviation University Qingdao Campus, Shandong Qingdao , China |
| GUAN Dingming |
PLA 91331 Unit, Liaoning Huludao , China |
| SHI Yue |
PLA 91331 Unit, Liaoning Huludao , China |
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| Abstract: |
| The work aims to propose a solution aiming at that a certain type of turboshaft aircraft engine experiences a right engine gas turbine speed (Ng) jump phenomenon during helicopter ground testing and air flight, and the speed jump value exceeds the allowable range. From the principle of measuring gas turbine speed data, a fault tree troubleshooting method was established to check various relevant parts that might cause jumping effects on Ng, and replace relevant accessories. Through a series of troubleshooting work and combined with the ground test results of the engine, the source of the fault was accurately located, and it was determined that the jump was caused by a false jump due to excessive clearance between the Ng sensor and the engine transmission gear which was a relatively rare fault source, rather than the real jump of Ng speed. Finally, after verification by experts from the engine factory, the transmission gear is replaced, and the fault is eliminated. Suggestions for preventing and eliminating this type of fault are also provided. |
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