CASAPPA_LVP_负载敏感泵工作原理汇.ppt

Motor Gear Returned from TORO PLATA Series variable displacement axial piston pumps PLATA features PLATA technical data Pump assembly Pump components Working principle Working principle Working principle Working principle Pump efficiency – experimental tests Pump efficiency – experimental tests Pump delivery Connections inside the cover Pressure control (RP) Pressure control (RP) Pressure control (RP) Flow control (LS) LS principle LS principle LS principle LS principle LS principle Flow control (LS) Flow control (LS) Flow control (LS) Torque control Torque control Torque control Torque control Torque control Torque control Torque control Diapositive The torque setting is a customer request The minimum torque limiter working pressure p’TC should be at least 80 bar 1 Flow control 2 Torque control 3 Pressure control Qmax p*PC The pump working conditions lie on a quadrangle, the up right corner excluded: the pump displacement adapts to system flow requirement, at any value of pressure if the absorbed torque tends to increase, the pump displacement is reduced, so that the maximum absorbed torque is limited to Tmax (and the power to Pmax at constant speed) the maximum pressure is still limited to p*PC by the pressure control Pmax 2 3 system flow requirement 1 p’TC Page * Working Principle and Hydraulic Controls Designed for open circuit Suitable for medium and high pressure, for both mobile and industrial applications Low noise emission Energy savings thanks to the variable displacement High operational flexibility thanks to the wide range of control options: pressure control flow control power (torque) control Short response time Drive shaft bearing suitable for both radial and axial loads Pump supports full torque transmission in multiple body configurations nmax Vmax -25 ÷ +90° With Buna [°C] Operating temperature Buna (N) – Viton (V) Seals -10 ÷ +90° 18 0.7 1500 1000 0.0020 46.2 129.3 19.9 39.8 43.5 87 3000 1.5 350 315 280 25 0.8 29 LVP 30 24 0.9 1500 1500 0