유압 피스톤펌프의 토출압력 및 사판각도 변화에 따른 유동특성 해석

다국어 초록 (Multilingual Abstract)

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

참고문헌 (Reference)

1 정종현, "액셜 피스톤 펌프내 유압유 유동에 대한 수치해석적 연구" 대한기계학회 34 (34): 129-136, 2010

2 박태조, "사판식 유압 피스톤 펌프용 Slipper Bearing내의 유동해석" 한국윤활학회 24 (24): 343-348, 2008

3 Guan, C., "Theoretical Study of Flow Ripple for an Aviation Axial-Piston Pump with Damping Holes in the Valve Plate" 27 (27): 169-181, 2014

4 ANSYS CFX, "Release 15.0 User Manual"

5 Kim, S., "Measurement of Effective Bulk Modulus and Its Use in CFD Simulation"

6 Kim, H.E., "Electronic Control Type Hydraulic Pump Development"