Hydraulic Basic Training

What is Hydraulic

Why we select Hydraulic ? Strength Point Big Power Easy control Weaken Point Energy loss Fire risk Leakage Change the motion according to temperature

Hydraulic Main Factor P : Pressure (kgf/cm2= bar, 1000psi=70bar) Power control Q : Pump flow (LMP= liter per minute) Speed control q : Pump displacement (용적, cc) W : Work or weight (kgf or N) A : 실린더 Area (cm2)

Hydraulic Factor T : Torque (Motor에 해당, kgfm or Nm) Power : E-motor or Engine (kW or HP) 4pole : 1,800rpm, 6pole : 1,200rpm V : flow velocity in Pipe (speed, m/sec) v : viscosity (mm2/s, cSt, VG)

Hydraulic Calculator P= W/A (kgf/cm2) Q=V*A (V=실린더 속도, A=실린더면적) Q=q*rpm*n (n=pump volume 효율) HP= P*Q/(450*n), kW=P*Q/(612*n) (n=E-Motor 효율)

Hydraulic Component Pump : Energy converter Valve : Controller Actuator : Mechanical motion Others : Accessory.

Hydraulic Factor Pump : Energy generator Relief : control power and safety Reducing : control the pressue Sequence and Counterbalance : control the motion Flow : control the speed Directional valve : control the front or back Actuator : Motion

Hydraulic Factor Orifice : 일정한 유량 통과 Pilot : Signal 전달 Spring : force Spool or poppet or throttle: 유량 제어

Hydraulic Pump Gear pump

Hydraulic Pump Gear pump

Hydraulic Pump Parker Gear pump Al pump Iron pump (주물 pump) PGP503, 505, 511, 517 (Commercial 500 series) P16.20.25, (Gresen) D, H series (Parker) Iron pump (주물 pump) PGP315, 330, 350, 365 (Commercial 300 series) PGP430, 450, 465 PGP030, 031, 050, 051, 075, 076 PGP620, 640 (Commercial 600 series)

Hydraulic pump How we can select?

Hydraulic pump What application 가장 쉽고, 저렴하고, 사용수량이 많음. 판매전략 Mobile Wrecker, Forklift, telescopic crane, agriculture, 이사짐 차량, 환경차량, 고소작업차, 차량운반차, 도로청소차량 외 etc. Industrial General Industrial, Standard HPU 판매전략 일부 국내 localizing이 되어 있으므로, 납기및 가격에 경쟁력이 있음. 또한 중국 텐진유압 인수로 인하여 향후 보다 가격적인 장점이 예상됨.

Hydraulic pump Vane pump Fixed

Hydraulic pump Vane pump : Fixed

Hydraulic pump Vane pump

Hydraulic pump Vane pump : Variable

Hydraulic pump Parker Vane pump Fixed (Denison) Variable vane pump T6,7 series Denison pump로써, 압력및 품질이 타사에 비해 경쟁력이 있으나, 가격은 다소 높은 상태임. Variable vane pump PVS series) 냉각수용 pump로 사용중.

Hydraulic pump How we can select?

Hydraulic pump What application 소음이 가장 적고, 용량에 비해 부피가 작으며, gear pump 보다 높은 효율을 가질 수 있으나, 가격이 상대적으로 높음. Mobile Wheel Loader, 건설장비 fan motor, 사료운반차량 etc. Industrial Injection Molding, 절단절곡기, General Industrial 판매전략 고압및 고품질로 승부. 경쟁사 제품은 Denison China 공장에서 나오는 저가형 pump로 대응 예정임. 가변 Vane pump는 전혀 경쟁력이 없음.