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- Title
Dynamic Characteristics of the Herringbone Groove Gas Journal Bearings: Numerical Simulations.
- Authors
Wang, Bin; Sun, Yongtao; Ding, Qian
- Abstract
Dynamic characteristics of the herringbone grooved gas journal bearings (HGGJB) under fluid-structure interactions are systematically investigated using the finite element method. Stability and bearing capacity of the HGGJB are estimated and compared with those of the plain gas journal bearings (PGJB). Influences of the structural parameters, including the spiral angle, the groove number, the groove depth, the pressure relief hole diameter, the bearing radial clearance, the length to diameter ratio, and the rotating speed, on dynamic characteristics of HGGJB are analyzed. To verify the numerical simulation results, pressure nephograms and cross-section pressure curves of the same rotor model, calculated by the numerical simulation and the theoretical method, respectively, are compared. Similar results are obtained. Compared to the common constrained boundary conditions in the previous numerical simulations, boundary conditions adopted in this paper are complete self-absorption and the change of the gas inlet and outlet depends on the rotating state of the rotor, which are more accordant with the real dynamic characteristics of the HGGJB. In all, the results presented in this paper provide a deeper and better understanding of the dynamic characteristics of the HGGJB under fluid-structure interactions.
- Subjects
GAS-lubricated journal bearings; COMPUTER simulation; STABILITY (Mechanics); FINITE element method; BOUNDARY value problems; FLUID-structure interaction
- Publication
Shock & Vibration, 2016, p1
- ISSN
1070-9622
- Publication type
Article
- DOI
10.1155/2016/8743016