• 제목/요약/키워드: Swash Plate

검색결과 118건 처리시간 0.031초

로드형 피스톤의 왕복운동 저항력 측정실험 (Measuring Experiment of Resistance Force on a Reciprocating Motion of Rod Type Piston)

  • 함영복;박경민;김성동;최병오
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2003년도 춘계학술대회 논문집
    • /
    • pp.486-489
    • /
    • 2003
  • To reduce lateral force of traditional plunger type piston in the swash plate type hydraulic piston pumps and motors, we have proposed rod type piston with ball joint on both ends. We have studied the theoretical reaction force on two types of piston moving in the cylinder block bore. and made an experiment for the resistance force measurement on a reciprocating motion of plunger and rod type piston, changing the test condition such as swash plate angel and supply oil pressure and so on. As a result. a rod type piston has more smaller resistance force, about 29%. than a plunger type one.

  • PDF

사판식 가변 용량형 액셜 피스톤 펌프의 일정출력 레귤레이터 특성 시뮬레이션 (Simulation on Characteristics of Constant Power Regulator Systems in Variable Displacement Axial Piston Pump)

  • 이지민;박성환;박용호;이현희
    • 동력기계공학회지
    • /
    • 제15권2호
    • /
    • pp.5-12
    • /
    • 2011
  • In this study, modeling and numerical simulations has been performed to investigate performance characteristics of constant power regulator system for swash plate type axial piston pump. The commercial numerical simulation software, AMESim was applied for analyzing the dynamic behavior of constant power regulator system of swash plate axial piston pump. The validity of simulation model of constant power regulator system is verified by comparing simulation results with experiments. Also, the behavior of main components of constant power regulator system such as spool, sleeve and counterbalance piston is investigated using the results of computer simulation.

자동차 배기가스 폐열 회수용 팽창기 개념설계 (Conceptual design of an expander for waste heat recovery of an automobile exhaust gas)

  • 김현재;김유찬;김현진
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 한국신재생에너지학회 2009년도 추계학술대회 논문집
    • /
    • pp.237-242
    • /
    • 2009
  • A steam Rankine cycle was considered to recover waste heat from the exhaust gas of an automobile. Conceptual design of a swash plate type expander was practiced to convert steam heat to shaft power. With the steam pressure and temperature of 35 bar and $300^{\circ}C$ at the expander inlet, respectively, the expander was estimated to produce the shaft power output of about 1.93 kW from the exhaust gas waste heat of 20 kW. The expander output increased linearly accordingly to the amount of exhaust gas waste heat in the range of from 10-40 kW, and the Rankine cycle efficiency was more or less constant at about 9.6% regardless of the waste heat amount.

  • PDF

사판식 피스톤 펌프 서보제어기구 설계 (The Design of Servo Control Mechanism for Swash Plate Type Axial Piston Pump)

  • 노종호;함영복;윤소남;최병오
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2002년도 추계학술대회 논문집
    • /
    • pp.741-744
    • /
    • 2002
  • The closed circuit pump is applied to control rotating speed and direction of hydraulic motor in hydrostatic transmission. To development of this pump, first of all the servo control regulator has to be designed. Mechanical-hydraulic type servo control mechanism is excellent to be compared with electronic-hydraulic type servo control valve to reliability and economy. In this paper to development positive and negative variable displacement type servo regulator, the hydro-mechanical servo control mechanism is calculated and designed with force balance of pilot piston and position feedback of servo piston.

  • PDF

사판식 피스톤 모터의 정압베어링 윤활특성에 관한 연구 (A Study on Lubrication Characteristic of the Hydrostatic Bearing In Swash Plate Type Piston Motor)

  • 이용범;김광민
    • 동력기계공학회지
    • /
    • 제15권5호
    • /
    • pp.5-9
    • /
    • 2011
  • The hydraulic piston using a hydrostatic bearing has been used widely due to its satisfying performance at very high pressurized circumstance and relative higher power density in comparison to conventional one. For high pressurization, enhanced efficiency and long durability of the hydraulic piston, the design of hydrostatic bearing is at issue, which is installed between piston shoe and swash plate. The performance of the hydrostatic bearing is influenced significantly by the assembly of the piston shoe consisting of circular land and recess. In this study, to estimate the performance of the hydrostatic bearing, the characteristics for lubrication of the assembly of the piston shoe were investigated by measuring a leakage rate of hydraulic fluid under an experimental condition, where a rotating velocity of the piston, hydraulic pressure and temperature of the hydraulic fluid were changed systematically. In addition, a film thickness of the hydraulic fluid on the piston shoe was measured and compared to theoretical one.

사판식 액셜 피스톤 모터의 틸팅 패드의 매카니즘에 대한 연구 (Study on the Tilting pad Mechanism of Swash Plate Type Axial Piston Motor)

  • 김진욱;이춘태;김종겸;허남수;이진걸
    • 한국정밀공학회지
    • /
    • 제8권2호
    • /
    • pp.78-88
    • /
    • 1991
  • The existing axial piston pump/motors of swash plate type rapidly drop efficiency in high speed region in comparison with low speed. This is the reason why the pump/motors were designed only in a view point of power supply. But, in this paper, the motor which was optimally designed on power supply load capacitancy, flow loss volume, axial stiffness and tiliting stiffness keeps up high efficiency in high speed region and in high pressure resion too.

  • PDF

EHA용 가변용적형 사판식 유압 피스톤 펌프의 하이브리드 제어 (Hybrid control of the swash plate-type variable displacement hydraulic piston pump for an EHA)

  • 권용철;홍예선
    • 한국항공우주학회지
    • /
    • 제41권4호
    • /
    • pp.291-298
    • /
    • 2013
  • 본 논문에서는 압력보상형 사판식 유압 피스톤 펌프와 밸브 제어형 실린더를 결합한 EHA에 대하여 유압 실린더의 소비 유량이 작으면 펌프 회전 속도를 낮추는 새로운 개념의 하이브리드형 제어 시스템을 제안하였다. 펌프 내 압력조절기의 사판각 제어와 간섭을 피하기 위해 위치 명령 신호의 속도 성분 평균치를 이용하여 펌프의 회전속도를 조절하였고, 시스템 압력이 기준치 이하로 낮아지는 것을 방지하기 위해 압력 스위치 기능을 추가하였다. 시뮬레이션과 실험 결과에 의하면, EHA의 동적인 응답 특성에 영향을 주지 않는 조건에서 하이브리드 제어를 통해 공전 모드에서의 펌프 회전속도를 1,800rpm에서 600rpm로 낮춤으로써 하이브리드 제어를 안 할 경우에 비해 펌프 구동 동력을 약 44%까지 절감시킬 수 있음을 확인하였다.