Wide range of units, modular solutions and controls. The variable displacement axial piston pump which is shown in fig. Fixed and variable displacement axial piston motors. Flow direction changes smoothly when the swashplate is moved through the neutral. Hydraulicspneumatics com sites hydraulicspneumatics com files uploads 2015 02 pumps1 figure 1. Since the pressure is equal on both sides of the spool, the differential spring keeps the spool to the left. In general, the swash plate design is used for pumps. These variable displacement pumps are available in nominal sizes from 108108 to 165165. Ill run through the basic types and reasons that you would use each.
Axial piston pumps are widely used throughout the mobile and industrial sectors. Axial piston variable displacement pumps series pvplus open circuit, variable swashplate piston pumps. There is no control pressure in the servo piston, so the pump will stay at full stroke. Analysis of a variable displacement axial piston pump, as in other complex fluid power and mechanical systems, requires appropriate insight into three multidisciplinary domains, i. A10vo piston pump manualmodule 3a description axial piston pumps model a10v0 are swash plate design variable displacement pumps.
Variable displacement axial piston pump for closed circuit 1 serie series 055 cilindrata 55 cm giro displacement 3. Variable displacement piston pumps are used in closed loop systems either as a single or tandem pump. Vdp series is a variable displacement axial piston pump designed to use in open circuits. The horse power control type c provides the benefit of the load sensing control, plus the ability to limit the input power the pump. A grooved timing plate at the at the top of the pistons controls the way the fluid is drawn through the suction side of the pump and out through the pressure side. The pump is fitted mainly to the power takeoff on commercial. The liebherr axial piston double pump dpvd series is developed for the open circuit in swash plate design. Series pvplus horse powertorque controls with load sensing. Axial piston pumps, variable displacement pumps series. Tpv 1200 btb is a variable displacement, compact tandem axial piston pump, with swashplate system, for closed loop hydrostatic transmissions. Variable displacement axial piston pump for open loop hydraulic systems 2. Modeling and performance improvement of the constant power. It has not only pioneered the closedcircuit variable displacement axial piston pumps but also the whole mobile hydraulic industry. The system should be designed to prevent aeration of the hydraulic fluid.
Test conditions focused on low displacement and low speed regimes. Their high performance ratings and efficiencies are achieved with a variety of hydraulic fluids. Hydro leduc is a specialist in the design and manufacture of piston pumps, hydraulic motors, hydropneumatic accumulators,and customized hydraulic components satisfying customer needs with. The performance and efficiency of hydraulic pumps and motors. Reversing the angle of the swashplate reverses the flow of oil from the pump. The parker pd series pump offers variable displacement axial piston pumps for opencircuit applications. They are available with the option of a thrushaft for operating additional hydraulic pumps in series. Model 70160 model 72400 model 70360 model 72400 back. As illustrated by the picture under functional purpose they. It can be used as a standalone pump, a hydraulic motor or an automotive air conditioning compressor. The line includes four different series of fixed displacement piston pumps.
Like all oilgear pumps, it thrives on lowviscosity fluids and comes in a variety of frame sizes and available displacement. As the pistons rotate, the angle of the plate causes them to move in and out of their cylinders. Axial piston pumps have a circular piston group which rotates against an angled swash plate. Its remarkably low noise levels, the high pressure rating peak 420 bar perm. Model brochures datasheets 2d dwgs 3d cad install spares k3vl28 k3vl45 k3vl60 k3vl80 k3vl112 k3vl140 k3vl200 k3vg series. The motor function is the reverse of the pump function. Axial piston variable pump a10vno series 52 and 53 hydraulic fluids 5 filtration of the hydraulic fluid the finer the filtration, the better the hydraulic fluid cleanliness level, and the longer the service life of the axial piston unit. The model is available as a double pump with a back to. Further information on the a4vso axial piston variable pump. The items described in this document and other documents and descriptions provided by parker hannifin corporation, its subsidiaries and its authorized. Dual flow variable displacement open circuit axial. The pump has been designed specifically for mini excavators where compactness and ease of installation are critical.
Flow is proportional to drive speed and displacement. As the rotary group turns the pistons are pushed forwards and backwards. Pdf displacement control in variable displacement axial. Animation how an axial flow variable displacement piston. Designed to be costeffective, stable and lowmaintenance, pvwj is a variable displacement axial piston pump with a medium control response. Hydraulictraining axial piston units basic principles. A cleanliness level of at least 201815 is to be maintained according to iso 4406. The fluid viscosity range for optimal use of mvp pump is betwe en 15. Gap flow simulation methods in high pressure variable. It can be used as a standalone pump, a hydraulic motor or an automotive air. Featuring a compact footprint and continuous operating pressure of up to 4,060 psi, pd piston pumps. The other series developed is known as 32 series, the available displacement is from 71ccrev to 180cc.
There are two kinds of variable displacement axial piston pumps. All models utilize the parallel axial piston slipper concept in conjunction with a tiltable swashplate to vary the pumps displacement. Variable displacement axial piston pump type v60n hawe hydraulik. Ar series variable displacement piston pumps 15 operating 1 2 5 10 20 50 100 150 16 ar16 ar22 m o 18 ar series variable displacement piston pumps pump type graphic symbol page mpa geometric displacement. In a variable displacement pump, if the vector normal to the cam plane swash plate is set parallel to the axis of rotation, there is no movement of the pistons in their cylinders. This pump has several pistons in cylinders arranged parallel to each other and rotating around a central shaft. Variable displacement, axial piston pump for opencircuit applications. Variable displacement swash plate type piston pump k3vl pumps are medium pressure, open circuit, axial piston pumps designed for mobile, industrial and marine use. Fixed and variable displacement axial piston motors fixed displacement axial piston motor m3x series the m3x series are newly developed motors for construction machinery, industrial machinery or other applications. A series variable displacement piston pumps a variety of control methods are supported ten types of unique control methods are available which integrate amplifiers and sensors. In an axial piston pump, the pistons and cylinder rotate around the center, longitudinal axis. Both fixed and variable displacement models make up this range of axial piston pumps.
Variable displacement swash plate type piston pump k3vg pumps. This work deals in particular with variable displacement swashplate axial piston pumps which play a relevant role in feeding adjustable power for hydraulic mobile systems. Axial piston double pump with variable displacement. During the pressure stroke, fluid is pushed out through the piston bores on the opposite side into the hydraulic system. The nominal pressure of the units is 400 bar and the maximum pressure is 450 bar absolute. A regenerative loop hydraulic system is used to reduce the power requirements of the test stand. Wide variety variation fixed displacement motors m3x series consists of 4 models and 10 displacement types ranging from 149cm3 to 800cm3. Series 90 axial piston pumps technical information general description series 90 hydrostatic pumps and motors can be applied together or combined with other products in a system to transfer and control hydraulic power. Features axial piston pump a10v in swashplate design is used for hydrostatic transmissions in open loop circuits. They are generally the pump of choice for flows over 5lmin and up to 415 bar, if budgets allow. Series 90 variable displacement pumps are compact, high power density units. In this context, variable displacement axial piston pumps are often u sed, whereby the displacement of the pump i. It has pioneered not only the closed circuit variable displacement axial piston pumps but also the whole mobile hydraulic industry.
Variable displacement axial piston pumps swash plate design ideally suited for open circuit in mobile hydraulic applications. Variable displacement piston pumps offer an array of controls based on pressure, flow, hp, or a combination of all of these. Variations with thrushaft for flange mounting additional variable displacement axial piston pumps and auxiliary pumps are also available. Downloads brochures, datasheets and drawings kpmus. Series 18 axial piston pumps and motors parts manual. The flow is proportional to the input drive speed and displacement. Variable displacement pump a10vo series 31, for open loop circuits, axial piston, swashplate design re 9270111. A charge supply is used to supplement the closed loop system with oil.
The variable displacement axial piston pump type a4vso in swashplate design is designed for open circuit hydrostatic drives. With a variable displacement from 18 cc to 141 cc 1. Oil is circulated by the pump to the motor and then returned directly back to the pump. Seller as its attorney to execute and file on buyers behalf all documents seller deems. Ar series variable displacement piston pumps single. In variable displacement axial piston pumps, the angle of the swash plate can be adjusted through a movable yoke, which can be controlled manually or by servomotor or compensator. P1pd series medium pressure axial piston pumps parker hannifin. Parker hannifln corporation hydraulic pump and power systems division marysville, ohio usa 1 catalog h282662cdus variable volume piston pumps introduction series pvp series sizes 60 140 phased out for reference only please see p1pd series quick reference data chart pump model displacement ccrev. The pressure regulators of swashplatetype variable displacement axial piston pumps vdapp control the swivel angle, which changes the. The compact design allows to be mounted directly on engine. Variable displacement closed loop system axial piston pump.
Speed min1 displacement cm 3rev page pv series p16v p21v p31v p40v p70v p100v pv 21 1800 a6 piston pump a 2. Axial piston variable pump aa10vso usversion ra 92711a07. Nonlinear pressure control of selfsupplied variable. Variable displacement closed loop system axial piston pump tpv 5000. Variable displacement closed loop system axial piston. The automatic overall torque limiter allows you to optimize the performance of the machine. Swash plate piston pump axial flow variable displacement.
Open circuit pumps are available with various control logic options. Re 92712 axial piston pump a10vo in swashplate design is used for hydrostatic transmissions in open loop circuits. An axial piston pump is a positive displacement pump that has a number of pistons in a circular array within a cylinder block. The test stand uses an xpc target data acquisition system. Installation manual medium heavy duty series ppv10016 ppv10037 ppv10056 ppv10071 ppv100100 ppv100145 ppv100180 medium heavy duty series ppv100s16 ppv100s37 ppv100s56 ppv100s71 ppv100s100 ppv100s145 ppv100s180 medium heavy duty series ppv10145 ppv10180 ppv101112 ppv101140 ppv101200. High pressure axial piston bent axis design with fixed displacement for open and closed. This is even more obvious if the pump is driven by a combustion engine. The displacement of axial piston pumps is determined by the size and number of pistons, as well as the stroke length which is determined by the angle of the. Sep 20, 2010 this feature is not available right now.
Flow rate is proportional to rotation speed and displacement, and is continuously variable. M3x with reduction gear series covers a displacement range. Optimized for heavy duty industrial and marine applications. In bent axis axial piston pumpsa shaft rotates a cylinder block with pistons, while the commutation unit and pressure ports are stationary. A swashplate at one end is connected to the pistons. The flow increases as the angle of the swashplate is adjusted from zero to its maximum value. Series 45 axial piston open circuit pumps technical information general information overview series 45 is a complete family of variable displacement, axial piston pumps for open circuit applications. Variable displacement axial piston pumps swash plate design ideally suited for medium and high pressure open circuit applications. Eaton pvh variable displacement piston pumps vickers. The lpv pumps provide an infinitely variable speed range between zero and maximum in both forward and reverse modes of operation. Changing the angle of the swashplate can change the piston stroke. Series 45 axial piston open circuit pumps technical.
Modelling a variable displacement axial piston pump in a. Axial piston pumps the pistons in an axial piston pump reciprocate parallel to the centerline of the drive shaft of the piston. Mediumpressure axial piston pump in swash plate design for the closed circuit. Variable displacement swash plate type piston pump k3vg pumps are high. Series pvp variable volume piston pumps parker hannifin.
Press brakes, injecting molding machines, extrudersmany kinds of applications that require a wide displacement range all benefit from eaton pvm series piston pumps. This variable displacement piston pump has dual flow and an additional piggybacked gear pump for auxiliary service, open center circuits. Movement of the swash plate controls pump output from zero to maximum. A variable displacement axial piston pump enables high pressure, high horsepower precision control in a compact package. Designed to be costeffective, stable and lowmaintenance, pvwj is a variabledisplacement axialpiston pump with a medium control response. Like all oilgear pumps, it thrives on lowviscosity fluids and comes in a variety of frame sizes and available displacement rates. A fixed displacement pump, regardless of type will deliver the same amount of fluid during each operating cycle. The basics of variable displacement pump controls crossco. Variable axial piston pump of swashplate design for hydrostatic drives in closed circuit the flow is proportional to the drive speed and displacement. Axial piston pump varies displacement by changing angle of swashplate. All models use the parallel axial piston slipper concept in conjunction with a tiltable swashplate to vary the pumps displacement. Variable axial piston pump a1vo series variable axial piston pump a10vo series. Feb 11, 2014 hi guys, hydraulic pumps are of various types, axial flow variable displacement piston pump are used in heavy hydraulic construction equipments.
A pump and motor test stand is constructed to measure the ef. Since the displacement of the pump is proportional to the piston stroke, the displacement can be changed by varying the angle of the swashplate, 1. Also observe the instructions for the other system components. The new mvpd series allow higher flow rates than traditional pumps. Fixed and variable displacement axial piston motors features 1. Operate in stroke of mobile machines harvesters, concrete mixers, paving compactors and other. One concept which needs to be explained first is the variable displacement. In this view the variable orifice is restricting pump flow. Variable displacement pumps tend to be somewhat larger and heavier, because they have added internal controls, such as handwheel, electric motor, hydraulic cylinder, servo, and mechanical stem.
The charge supply may be supplied by an internal charge pump standard or an. The pistons and shoes move in and out of the cylinder because they are sliding upon a stationary, variable angle, swashblock. Service parts manual axial piston pumps and motors, series 18 bn241635 520l0664 rev ba feb 2014 5 general information date code the date code is defined as the year and week of manufacture. A common variable displacement pump used in vehicle technology is the axial piston pump. The axial piston variable displacement pumps of the type v 30 of e offer extremely high function safety. Axial piston pumps operating pressure up to 210 bar. The design based on technology and experience of current mx series is more compact and enables a speed range.
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