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사판식 피스톤 모터의 성능향상을 위한 설계변수 특성 연구
정유성(Yoo Seong Jeong),정원지(Won Jee Chung),사진웅(Jin Woong Sa),정용욱(Young Wook Jeong) 한국생산제조학회 2017 한국생산제조학회지 Vol.26 No.2
Hydraulic equipment have been traditionally used for constructing machines with high power density and durability. In particular, pumps and motors are considered essential equipment, and are consistently investigated to find suitable methods for optimal utilization of their characteristics. A kinematic analysis of a swash-platetype piston motor model using the hydraulic analysis program SimulationX® to model a nine-piston motor and simulate a swash-plate angle with a low-pulsation and high-efficiency performance of the motor has been provided in this paper. Finally, along with the theoretical consideration of the stroke, the effect of changing strokes and notch shape (V, U, non-type) on the pulsation is simulated to analyze and determine the effects of reduction in pulsation. The optimal swash-plate angle and stroke thus obtained will reduce the trial and error in future design.
경전각 유효성 응용기술을 활용한 가변용량형 선박엔진 피스톤 펌프의 유동 특성 연구
이산성(S. S. Lee),정원지(W. J. Chung),이정실(J. S. Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
In the swash plate type pump, the driving shaft and the central axis of the cylinder block have a predetermined angle. In the swash plate type pump, the main shaft and the cylinder block are parallel to each other and have a predetermined angle through the swash plate. In this paper, the structural stability of a variable capacity swash plate type piston pump for a ship engine is analyzed by analyzing the flow rate and the ripple effect on the piston design element.
유압 피스톤펌프의 토출압력 및 사판각도 변화에 따른 유동특성 해석
윤종혁(J.H. Yoon),이경준(K. Lee),강명철(M.C. Kang) 한국전산유체공학회 2016 한국전산유체공학회지 Vol.21 No.1
In various industries related with construction and military machinery, a large amount of power is normally required because such machinery operations, such as digging or breaking, take place under difficult working conditions in a rough environment. Thus, a hydraulic system needs to be applied as the major power transfer system. To produce and supply hydraulic power depending on the various load conditions, a hydraulic piston pump is utilized as a typical power source for a hydraulic system. In the present study, numerical simulations were conducted using the commercial program, Ansys CFX 14.5. To lubricate the moving parts as the pump starts to operate, a small amount of oil leaks out through the clearance between the orifice in the piston-shoe and the recess at the swash-plate. Taking this into consideration, a cylindrically shaped computational domain was modeled to maintain the same equivalent leakage area. To validate the numerical method applied herein, the numerical results of the flow rate at the discharge port were compared with the experimental data, and a good agreement between them was shown. Using the verified method, the effects of the discharge pressure and the angle of the swash-plate were also evaluated under several load conditions. The results of the present study can be useful information for a hydraulic piston pump used in many different manufacturing industries