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某型航空发动机在试车时,支点增压系统中的涡轮通风活门在小转速下压力低于规定值,而在大转速时压力偏低,严重影响发动机滑油系统的封严作用。针对此故障现象,从发动机的结构、装配以及台架试车等方面进行分析,确定了故障原因,可以更好地采取排故措施。
When a certain type of aeroengine is under test, the pressure of the turbine ventilation valve in the fulcrum supercharging system at a low speed is lower than a predetermined value, while the pressure is low at a high speed, which seriously affects the sealing effect of the engine lubricating oil system. In view of this fault phenomenon, from the engine structure, assembly and test bench and other aspects of analysis to determine the cause of the malfunction, you can better take troubleshooting measures.