Overhaul Manual - Vickers伊顿威格士-液压

1 M-2854-SReleased 8/1/90 Overhaul ManualPVE Variable Pump12 21 USgpm capacity at 1800 rpmVickers piston Pumps2 Table of ContentsSectionPageI. Introduction3.. A. Purpose of Manual3.. B. General Information (Related Publications/Model Code)3.. II. Description6.. A. General6.. B. Application6.. III. Principles of Operation7.. A. piston Pump7.. B. Compensator (Flat Cut-Off Type - C )7.. C. Compensator (Remote Control Type - CG )7.. D. Compensator (Load Sensing Type - CV )8.. E. Compensator (Load Sensing with Pressure Limiting - CVP , CVPC , CVPD )10.. IV. Installation and Operating Instructions12.. A. Installation Drawings12.. B. Mounting and Drive Connections12.. C. Shaft Rotation12.. D. Piping and Tubing12.. E. Hydraulic Fluid Recommendations12.. F. Overload Protection13.

2 G. Start up13.. V. Service and Maintenance14.. A. Service Tools14.. B. Inspection14.. C. Adding Fluid to the System14.. D. Adjustments14.. E. Lubrication14.. F. Replacement Parts16.. G. Troubleshooting17.. VI. Overhaul18.. A. General18.. B. Disassembly18.. C. Inspection, Repair and Replacement18.. D. Assembly of Compensator23.. E. Removal and Disassembly of Rotating Group23.. F. Inspection, Repair and Replacement24.. G. Assembly of Housing Parts26.. H. Disassembly of Valve Block28.. I. Inspection, Repair and Replacement 28.. J. Assembly of Valve Block28.. K. Shaft Bearing Preload Adjustment29.. L. Final Assembly of PVE Series Pump29.

3 Procedure30.. A. Test Conditions30.. B. Preliminary Check30.. C. Preliminary Set Up30.. D. Performance Test30.. E. Performance Test of piston Pump with C Compensator Control30.. F. Performance Test of PVE 12/19/21 piston Pump with CG Compensator Control31.. G. Performance Test of PVE 12/19/21 piston Pump with CV , CVP , CVPC and CVPD Compensator Control32.. H. Load Sensing Control Test32.. 3 Section I Introduction A. Purpose Of ManualThis Manual describes operational characteristics andoverhaul information for the PVE12, 19(*) and thePVE21(*) ** variable displacement piston pumps . Theinformation contained herein pertains to the latest designseries as listed in Table General Information1. Related Publications - Service parts informationand installation dimensions are not contained in thismanual.

4 The parts and installation drawings listed inTable 1 are available from authorized distributors or Model Codes - Variations within each basic modelseries are covered in the model code. Table 2 shows acomplete breakdown of the model codes covering theseunits. Service inquiries should always include the completemodel code number as stamped on the mounting as C** except withmax. adj. compensation withremote control (see C**)Electric dual range com-pensationSame as CD except withmax. adj. stopDesign9510117134561223 Table 2. Model Code Breakdown4 Flow RatingUSgpm @ 1800 rpm87910116 Noise Level RatingBlank Standard UnitQ Industrial Quieter 1800 rpm @ 207 bar (3000 psi)Pump, Variable Displacement,Inline piston , E-SeriesControl Options (Con t)(** = Pressure setting in tens of bars)Control Bleed DownBlank C, CC, CG, CD, CCDB Bleed down orifice (CVP & CVPC)P Plug (no orifice) (CVP & CVPC)Port ConfigurationE End ported, SAE O-ringM End ported, metric O-ring (per ISO 6149)Shaft SealS Standard shaft sealN No shaft sealInput Shaft Type1 SAE B Straight keyed2 SAE B Splined8 Shaft Rotation(Viewed from shaft end)R Right hand (clockwise)L Left hand (counterclockwise)

5 1212 Control DesignCC** -CG**-CD -CCD -Mounting FlangeB SAE B 2 bolt10 Control Options(** = Pressure setting in tens of bars)C** C**VP** C**VPC** C**VPD** Pressure compensatorMax. setting 207 bar (3000 psi)Range 02-21 barPressure & load sensingPressure compensating(see C**)Load sensing (see CV**)Pressure and load sensingPressure compensating(see C**)Load setting 24 bar (350 psi)Range 17-31 bar (251-450 psi) Pressure & load sensingPressure compensating(see C**)Load setting 41 bar (600 psi)Range 32-45 bar (451-650 psi)Same as C** except withmax. adj. compensationwith remote control (see C**)Electric dual range com-pensationSame as CD except withmax. adj. stop4C-10 CG-10 CV-10 CVP-12 CVPC-12 Pressure compensated(PVE19, 250-3000 psi)(PVE21, 250-2700 psi)Remote control pressurecompensator adjustablefrom 350-3000 psi usingand external relief sensing PVE19/21 Load sensing (160 psid)with pressure compensationPVE 19/21 Load sensing (350 psid)with pressure compensationPVE 19/215 Pump Design671361223 Table 2.

6 Model Code Breakdown (Con t)4 Flow RatingUSgpm @ 1800 rpm19 19 USgpm21 21 USgpmPump, Variable Displacement,Inline piston , E SeriesControl Options(** = Pressure setting in tens of bars)Control DesignSpecial SuffixInput Shaft Type1 SAE B Straight keyed2 SAE B 15 tooth splined9 SAE B 13 tooth spline8 Shaft Rotation(Viewed from shaft end)R Right hand (clockwise)L Left hand (counterclockwise)45785 Figure 1. Sectional Views of the PVE PumpsDrive ShaftPVE19 Section ViewPVE12 Section ViewHousingRotating GroupTapered RollerBearingYokeWafer PlateCompensatorYokeHousingCompensatorVa lve BlockShaftSealShaftBearingPiston6 Section II Description A. GeneralAssembly of a typical pump package is shown in Figure types of compensator subassemblies are used with thePVE series pumps .

7 Refer to Section III for principles ofoperation. See Model Code for pressure Compensator (C), (Flat Cut-Off Type): A pump usingthis compensator will maintain a constant load pressure forall values of flow within the capacity of the Compensator (CG), (Remote Control Type): Thiscompensator is similar to the C type compensator exceptthe compensator is controlled by a remote hydraulic sourcesuch as a relief Compensator (CV), (Load Sensing Type): A loadsensing compensator provides flow at a pressure equal tothat required by the load plus a constant value used as apressure drop across a metering valve. The pump willchange its flow with changes in size of the metering valveorifice. The pump and compensator together provide aconstant flow source for the load, at a pressure establishedby the requirements of the load, hence the title LoadSensing.

8 CAUTIONA relief valve must be provided in the external circuitto prevent excessive pressure build up at the Compensator (CVP), (Load Sensing PressureLimiting Type): The CVP control is a combination of thestandard flat cut-off compensator (C) and the load sensingcompensator (CV). The load sensing compensator controlsflow to the load across an external valve orifice. If pressurebuild up exceeds the flat cut-off compensator setting, the flatcut-off compensator overrides the load sensing compensatorand lowers the flow to prevent excessive pressure build-upat the Compensator (CVPC), (Load Sensing PressureLimiting Type): This compensator is the same as the CVP compensator except the load sensing spring is heavier. Theheavier spring provides a slightly higher pressure differential(160nP vs.)

9 350nP) across the external valve orifice. SeeFigure Compensator (CVPD), (Load Sensing, PressureLimiting Type): Same as CVPC except with Application Pump ratings in USgpm as shown in the model coding are at1800 rpm. For ratings at other speeds, methods of installa-tion and other application information, contact an authorizeddistributor or sales PortDrive ShaftOutlet Wafer PlateKidney SlotOutlet PortWafer PlateShoe PlateYoke FaceCylinderBlock BoreIntake KidneySlot AreaPiston7 Section III Principles of Operation A. piston PumpRotation of the pump drive shaft causes the cylinder block,shoe plate and pistons to rotate. See Figure 2. The pistonshoes are held against the yoke face by the shoe plate. Theangle of the yoke face imparts a reciprocating motion toeach piston within the cylinder block.

10 Inlet and outlet portsconnect to a kidney slotted wafer plate. As the pistons moveout of the cylinder block, a vacuum is created and fluid isforced into the void by atmospheric pressure. The fluidmoves with the cylinder block past the intake kidney slot tothe outlet (pressure) kidney slot. The motion of the pistonreverses and fluid is pushed out the cylinder block into theoutlet Compensator (Flat Cut-Off Type)A flat cut-off compensated pump will maintain a constantload pressure for all values of flow within the capacity of thepump providing the load is sufficient to build up step by step description of the flat cut-off type compensa-tor control follows. Refer to Figure 3 throughout a no load condition exists, the pump will delivermaximum flow at zero pressure.