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논문 기본 정보

자료유형
학술저널
저자정보
Hongsik Yun (Kumoh National Institute of Technology) Young-Bog Ham (KIMM) Sungdong Kim (Kumoh National Institute of Technology)
저널정보
유공압건설기계학회 드라이브·컨트롤 드라이브·컨트롤 Vol.17 No.2
발행연도
2020.6
수록면
28 - 37 (10page)

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초록· 키워드

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It is difficult to analytically derive the relationship among volumetric displacement, flowrate, torque, and rotation speed regarding an instantaneous position of gerotor hydraulic pumps/motors. This can be explained by the geometric shape of the rotors, which is highly complicated. Herein, an analytical method for the instantaneous torque, rotation speed, flowrate, and volumetric displacement of a pump/motor is proposed. The method is based on two physical concepts: energy conservation and torque equilibrium. The instantaneous torque of a pump/motor shaft is determined for the posture of rotors from the torque equilibrium. If the torque equilibrium is combined with the energy conservation between the hydraulic energy of the pump/motor and the mechanical input/output energy, the formula for determining the instantaneous volumetric displacement and flowrate is derived. The numerical values of the instantaneous volumetric displacement, torque, rotation speed, and flowrate are calculated via the MATLAB software programs, and they are illustrated for the case in which inner and outer rotors rotate with respect to fixed axes. The degrees of torque fluctuation, speed fluctuation, and flowrate fluctuation can be observed from their instantaneous values. The proposed formula may provide a better understanding of the design or analysis process of gerotor pumps/motors.

목차

Abstract
1. Introduction
2. Torque, volumetric displacement, and flowrate
3. Contact points of the inner and outer rotors
4. Numeric examples
5. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2020-550-000677968