| QU Yan-jing 1, CAO Li-na 2, LUAN Xu1, SONG Guan-lin 1, SHI Yan-yan 1, YANG Jie 1.Failure Analysis of Oil Level Abnormally Declined for an Aeroengine[J].航空发动机,2018,44(1):27-31 |
| Failure Analysis of Oil Level Abnormally Declined for an Aeroengine |
| DOI： |
| Key Words:oil level oil pump seal cup crack fault aeroengine |
|
| Hits: 1639 |
| Download times: 1368 |
| Abstract:Aiming at the problem of oil level of tank anomaly declined occurred several times in the flighttest for aeroengine, the
reason was identified that the crack of oil pump seal cup caused oil level decline through the analysis of lubrication system. According to
the faulty component review, fracture analysis and design review, the cause of failure was identified finally. The result shows that the oilthrough
hole in the oil pump's inter stage shell is connected with pressure pump's outlet. It resulted that seal cup's sealing pressure was too
large, which was the main reason of the occurrence of seal cup crack fault. The large interference between seal cup and pump's axial is the
auxiliary reason. The hydraulic pressure and friction of the cup seal is reduced through the optimization design of structure parameters of oil
pump, and the sealing performance and life is improved, accordingly, the analogous failure can be avoided |
| View Full Text View/Add Comment Download reader |
|
|
|
