Volume 39 Issue 6
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HUANG Yanzhong, ZHANG Guanghui, MA Huifang, et al. Experiment on dynamic characteristics of squeeze film damper with different groove[J]. Journal of Aerospace Power, 2024, 39(6):20210705 doi: 10.13224/j.cnki.jasp.20210705
Citation: HUANG Yanzhong, ZHANG Guanghui, MA Huifang, et al. Experiment on dynamic characteristics of squeeze film damper with different groove[J]. Journal of Aerospace Power, 2024, 39(6):20210705 doi: 10.13224/j.cnki.jasp.20210705

Experiment on dynamic characteristics of squeeze film damper with different groove

doi: 10.13224/j.cnki.jasp.20210705
  • Received Date: 2021-12-14
    Available Online: 2024-01-26
  • The effects of groove depth, oil supply pressure, and the number of oil supply holes on leakage and damping performance of SFD with piston ring end-seals were discussed based on the SFD dynamic coefficients identification experimental device. The experiment results showed that the leakage with the groove was 2—7 times that without the groove of SFD. The test results of the damping coefficient under low oil supply pressure were close to the theoretical solution of short bearing, and the test results under high oil supply pressure were between the theoretical solutions of short bearing and long bearing. Compared with the results of SFD without a groove, the damping performance could decrease with the groove structure, but the damping coefficients were close to each other when the oil supply pressure was less than 0.1 MPa. When the groove was shallow (the depth was 5 times the clearance of oil film radius, 5c), the average damping coefficient of single hole & low oil pressure and multiple hole & high oil pressure all can attain 4.0×104—5.0×104 N·s/m, yet when the groove was deep (the depth is 5c), the average damping coefficient of single hole & low oil pressure was large, up to 8.06×104 N·s/m. As a result, the introduction of a groove can significantly improve the damping coefficients of SFD, which can be used to improve the damping performance of SFD under low oil supply pressure.

     

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