서지주요정보
외부가압 공기저어널베어링의 안정성 및 회전정밀도에 관한 연구 = A study on the stability and rotational accuracy of externally pressurized air journal bearing
서명 / 저자 외부가압 공기저어널베어링의 안정성 및 회전정밀도에 관한 연구 = A study on the stability and rotational accuracy of externally pressurized air journal bearing / 김금모.
저자명 김금모 ; Kim, Keum-Mo
발행사항 [대전 : 한국과학기술원, 1992].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8002415

소장위치/청구기호

학술문화관(문화관) 보존서고

DPE 92001

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Externally pressurized air journal bearing is in wide use in high speed rotating machinery and high precision spindle system because of its advantages such as low friction, low heat generating character and averaging effect of the pressure deviation in the air film in bearing. Stability characteristics and rotational accuracy of externally pressurized air journal bearing are studied both theoretically and experimentally to forecast and to prevent the whirl instability and to supply the basic data about the shape tolerance of precision air bearings. As for the high speed rotating machinery, the instability called 'whirl' occurs when the rotor rotates at a speed more than twice the resonant speed. Once the whirl occurs, rubbing contact between the journal and the bearing occurs mostly and the bearing-rotor system is destroyed ultimately. therefore, the forecasting and prevention of the occurence of whirl instability is a very important subject especially to develop highly efficient high speed machinery. Theoretical method adopting new boundary condition which takes inertia effect around the feeding hole into account is proposed and used to calculate the stability characteristics. The multi-lobe bearing is used for the propose of the prevention of whirl instability. It is shown that the theoretical method proposed in this thesis can forecast the instability threshold more easily and more accurately than conventional methods and that the two-lobe bearing is most stable and useful for the purpose of the prevention of whirl instability. With respect to the rotational accuracy of precision air bearings. the quantification of the effect of shape error of spindle parts on the rotational accuracy is carried out. The journal and bearing are considered to have sinusoidal lobe profile and the effect of roundness of the journal and bearing on the rotational accuracy is examined. The expression which quantify the maximum amplitude of the locus of the journal center under various operating conditions owing to the error of form of both bearing and journal is presented.

서지기타정보

서지기타정보
청구기호 {DPE 92001
형태사항 v, 132 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Keum-Mo Kim
지도교수의 한글표기 : 정경훈
지도교수의 영문표기 : Kyung-Woong Kim
학위논문 학위논문(박사) - 한국과학기술원 : 정밀공학과,
서지주기 참고문헌 : p. 119-124
주제 Gas-lubricated bearings.
Spindles (Machine-tools)
Rubbing.
High-speed machining.
공기 베어링. --과학기술용어시소러스
저널 (기계). --과학기술용어시소러스
스핀들. --과학기술용어시소러스
동적 안정성. --과학기술용어시소러스
Journal bearings.
QR CODE qr code