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연속 접촉 헬리컬 기어펌프의 수치해석 연구: 모델 개발 및 적용
장호성(H. S. Jang),박민규(M. G. Park),성준영(J. Y. Seong),양경욱(K. U. Yang),최세령(S. R. Choi),지상원(S. W. Ji) 유공압건설기계학회 2022 유공압건설기계학회 학술대회논문집 Vol.2022 No.06
External gear pump(EGP) has a simple structure and excellent durability among hydraulic pumps, so they are generally used in hydraulic control system and fuel transfer system. However, in an involute tooth type pump, a volume trapped between the gear teeth is formed during two-point contact, and as a result pressure pulsation, vibration, and noise are generated, thereby deteriorating volumetric efficiency. To compensate for these shortcomings, a continuous contact helical gear pump(CCHGP) has been proposed and has been commercialized recently. Advantages have proven to be of great benefit in terms of reduced flow and pressure pulsations, as well as noise reduction due to the absence of entrapped volumes. However, unbalanced thrust occurs and manufacturing is difficult, so related research is insufficient. In this paper, continuous contact gear teeth were designed, and flow analysis was performed using a commercial program (SimericsMP+) to shape continuous contact helical gear teeth. We present a numerical approach to predict flow and pressure pulsations and pump performance by applying cavitation and turbulence.
류하오(Hao Liu),윤권수(Gwon Soo Yun),이인규(In Gyu Lee),이은진(Eun Jin Lee),신현명(Hyun Myung Shin),이재천(Jae Cheon Lee),전세호(Se Ho Jeon),김융성(Yung Sung Kim) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.11
In this paper, Three gear shapes of the gerotor pump are studied. First, a trochoid profile was illustrated using the cycloid curve. Secondly, a tooth profile which connected to the epicycloid curve and the hypocycloid curve was illustrated. Finally, it was illustrated a tooth tangent curve connected between Hypocycloid curve and epicycloid curve. The port was designed for the CFD analysis, and it was modeled with 3 profile in CATIA software. It was analyzed using PUMPLINX software to compare performance.