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회전 홈과 정지 홈을 동시에 갖는 단품 유체동압베어링의 동특성 해석
이지훈(Jihoon Lee),장건희(Gunhee Jang),정경문(Kyungmoon Jung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Low vibration and high operating speed of the spindle motor are essential to achieve high memory capacity of computer hard disk drives. These requirements can be accomplished by using the fluid dynamic bearings (FDBs) with high dynamic performance and low friction torque. This research derives the modified Reynolds equation to solve the static and dynamic characteristics of the FDBs with both rotating and stationary grooves, and it is solved by using the finite element method and the cavitation algorithm. The proposed method is numerically validated by comparing the results of the proposed method with those of the prior researches which have either rotating grooves or stationary grooves. This research proposes the FDBs with rotating and stationary grooves at the same time, and it shows that the proposed model has less friction torque and high dynamic performance.