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Vickers ® AC Motorpump

Vickers ® AC Motorpump

Product catalog summary

Overview
Eaton's AC motorpump model MPEV3-019-2 is designed to supply hydraulic power on commercial aircraft. It features an air-cooled electric motor and a variable displacement inline axial piston hydraulic pump with an integral impeller boost stage. This model replaces older models in low inlet pressure applications and is used on aircraft like the Dassault Falcon 2000 and Canadair Regional Jet.

Key Design Features
The motorpump is environmentally sealed and qualified per MIL-STD-810E. It includes a barrier seal in the electric motor, a carbon shaft seal, and an integral inlet boost impeller. The smaller frame size reduces heat rejection, and the nine-piston design decreases pressure ripple. The displacement is 0.13 in³/rev.

Electric Motor
The motor is a 115/200 volt, 400 hertz, 3-phase, explosion-proof, fan-cooled AC motor. It features a double squirrel-cage rotor for high starting torque and efficiency, and a unique stator winding technique for reduced weight. The windings are protected by heavy-duty insulation resistant to high temperatures and fluids.

Hydraulic Pump
The pump includes design features for improved reliability and maintainability, such as increased fatigue strength, a proven yoke design, and a centrifugal boost impeller. It has a one-piece housing with an integrated valve plate to reduce weight and minimize leakage. The pump is a variable displacement, pressure-compensated inline pump with a maximum displacement of 0.13 in³/rev.

Basic Pump Operations
Torque is transferred from the motor to the pump drive shaft, generating pumping action through piston movement. The yoke angle converts rotary motion to piston reciprocating motion, with fluid being compressed and expelled through the valve block outlet port. Internal leakage provides lubrication and cooling.

Control Features
The pump operates in a normal pumping mode with a flat cut-off pressure compensator. It adjusts the yoke angle to maintain system pressure at 3050 psi (209 bar) by varying pump displacement and flow based on system demand.

Performance and Installation
The performance graph shows pressure and current against flow rate, indicating the motorpump's efficiency at 115 V, 400 Hz. An installation diagram provides a flow schematic of the motorpump's components and connections.

Catalog excerpts

F:T*N Powering Business Worldwide

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Air Cooled Motorpump, Model MPEV3-019-2 (P/N 00-972775) Key Design Features Model MPEV3-019-2 is environmentally sealed and qualified per MIL-STD-810E. A barrier seal is provided in the electric motor at both ends and a shroud also covers the fan end of the electric motor. The pump also incorporates a new carbon shaft seal and an integral inlet boost impeller is located at the valve port end of the pump. The smaller frame size reduces heat rejection and the nine piston design decreases the pressure ripple in the pump. The displacement of model MPEV3-019-2 is 0.13 in3/rev. Electric Motor The electric...

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ELECTRICAL CONNECTOR ELECTRIC MOTOR ACTUATOR PISTON COMPENSATOR VALVE SHAFT SEAL \ SUBASSEMBLY \ SHAFT SEAL DRAIN PORT MATING SEEP DRAIN motor cavity Model MPEV3-019-2SHAFTInlineAC Motorpump FlowSchematic INLET PRESSURE □ CONTROL PRESSURE I CASE PRESSURE □ OUTLET PRESSURE | Installation 972921 PLATE, IDENTIFICATION (MOTORPUMP) 972778 ELECTRIC MOTOR, SUBASSEMBLY 622216 PLATE, UPDATE RECORD- (ELECTRIC MOTOR IDENTIFICATION PLATE) AN 8 I 4-4 K L (199647) PLUG NAS 1602-904 (271085) PACKING, PREFORMED 3 PLACES TORQUE 38-42 LB-IN ■471307 PLUG, HEX SOCKET, SAE J5I4 NASI 602-902 ( 271083) PACKING 6 Pi...

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Eaton Aerospace Group Fuel & Motion Control Systems Division 5353 Highland Drive Jackson, Mississippi 39206-3449 Phone: (601) 981 2811 Fax: (601) 987 5255 Eaton -e|OS|M.e Gl"U|. 0C50 Je|"|||hl" Road Iivine. Calil-inia 926 18 Ph 949 452-9500 Fax 949 452-9555 waVWa:al"n.':"hrae|"S|,aOO C"|'yilghi O 2013 Eat"n -ll Riglils Reserved F"'ih i Mas TF-500-5C Oal"|,:| 2013

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Vickers ® AC Motorpump

Vickers ® AC Motorpump

Catalog excerpts

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