Dynamic characteristics of a coupled journal and thrust hydrodynamic bearing in a HDD spindle system due to its groove location |
| |
Authors: | G H Jang J W Yoon |
| |
Affiliation: | (1) PREM, Department of Mechanical Engineering, Hanyang University, Seoul, 133-791, Korea E-mail: ghjang@hanyang.ac.kr, KR |
| |
Abstract: | This research numerically analyzes the dynamic characteristics of a coupled journal and thrust hydrodynamic bearing due to
its groove location which has the static load due to the weight of a rotor in the axial direction and the dynamic load due
to its mass unbalance in the radial direction. The Reynolds equation is transformed to solve a plain member rotating type
of journal bearing (PMRJ), a grooved member rotating type of journal bearing (GMRJ), a plain member rotating type of thrust
bearing (PMRT), and a grooved member rotating type of thrust bearing (GMRT). FEM is used to solve the Reynolds equations in
order to calculate the pressure distribution in a fluid film. Reaction forces and friction torque are obtained by integrating
the pressure and shear stress along the fluid film, respectively. Dynamic behaviors, such as whirl radius or axial displacement
of a rotor, are determined by solving its nonlinear equations of motion with the Runge–Kutta method. This research shows that
the groove location affects the pressure distribution in the fluid film and consequently the dynamic performance of a HDD
spindle system.
Received: 5 July 2001/Accepted: 17 October 2001 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|