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Rotordynamics/discharge water-hammer coupling via seals in pump rotordynamics

A new closed-loop frequency-domain model is developed to incorporate the water hammer effect with pump rotordynamics, in order to investigate the sub-synchronous instability problem observed in a field pump. Seal flow-rate perturbations due to eccentricity are calculated from Soulas and San Andres's seal code. A complete transfer function matrix between rotor motion and reaction force due to pressure perturbation is developed in detail. Stability analysis with transfer-function'add-in' modules is conducted in XLTRC2. Seal clearances and the reaction force angle are found to be important in shifting natural frequencies and damping. The sub-synchronous instability observed in field is duplicated successfully with double-clearance seals.

Identiferoai:union.ndltd.org:TEXASAandM/oai:repository.tamu.edu:1969.1/514
Date30 September 2004
CreatorsZhang, Kaikai
ContributorsChilds, Dara W., San Andres, Luis, Roesset, Jose M.
PublisherTexas A&M University
Source SetsTexas A and M University
Languageen_US
Detected LanguageEnglish
TypeElectronic Thesis, text
Format1370956 bytes, 78121 bytes, electronic, application/pdf, text/plain, born digital

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