期刊
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
卷 142, 期 9, 页码 -出版社
ASME
DOI: 10.1115/1.4046813
关键词
analytical method; hydrodynamic force; tilting-pad journal bearing; turbulence; low viscosity; fluid film lubrication; hydrodynamic lubrication; journal bearings
资金
- National Basic Research Program of China [2015CB057303]
- National Natural Science Foundation of China [51775412]
To improve the efficiency in nonlinear dynamic calculation of finite-length tilting-pad journal bearings (TPJBs) under dynamic loads, an analytical method for hydrodynamic bearing forces, which considers the turbulence effect, is proposed using the method of separation of variables under the dynamic Gumbel boundary condition. No thermal effects are considered because this method is designed for the low viscosity case. The infinitely long bearing pressure is introduced as the circumferential pressure, and a general solution of the nonhomogeneous Reynolds equation is derived as the axial pressure. The turbulence model of Ng and Pan is characterized by a linear function of film thicknesses. A complete analytical expression of hydrodynamic bearing forces is derived. The analytical simulation shows slight differences and extremely low time expense in lubricating and dynamic performance compared to published data and finite difference method (FDM) simulation. The analytical method could be used to fast evaluate the nonlinear dynamic performance of a TPJB-rotor system in the low viscosity environment, supporting the nonlinear dynamic design of the system.
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