Pdf vibration analysis of constant power regulated swash. Suitable f or operation with mineral oil and hf hydraulic fluids allpurpose medium pr essure pump sizes 18 to 140 nominal pr essure 4100 psi 280 bar maximum pres sure 5100 psi 350 bar open circuit axial piston variable pump aa10vso series 31 americas. The universal through drive is suitable for adding gear pumps and axial piston pumps up to the same size, i. A7vo axial piston variable pump, open circuit threaded plug metal screw, pressureresistant protective plug made out of plastic, not pressureresistant, only for transportation as umbrella term for axial piston variable pump a7vo the designation axial piston unit will be used in the following. 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. Hydraulictraining axial piston units basic principles. Analysis and design of an axial piston waterpump with. The medium md10v pump is a swash plate, axial piston hydraulic unit with variable displacement for closed loop circuits.
Axial piston variable pump a4vg data sheet series 32 size 28 to 250 nominal pressure 400 bar maximum pressure 450 bar closed circuit features variable axial piston pump of swashplate design for hydrostatic drives in closed circuit. These variable displacement pumps are available in nominal sizes from 108108 to 165165. In this paper, we present a novel axial piston waterpump with piston valve, which carries out the flow distribution to drain and sucks water by the interaction of each piston. Variations with thrushaft for flange mounting additional variable displacement axial piston pumps and auxiliary pumps are also available. Pumps are designed to satisfy the marine, mobile and industrial markets where a mediumhigh pressure variable. Variable displacement axial piston pump type v60n hawe hydraulik. In this context, variabledisplacement axial piston pumps are often u sed, whereby the displacement of the pump i. Stable storage for long service life high permissible drive speed. As a result they vary the flow rate that is provided to the consumers. Axial piston units title index open circuit the way to the complete hydraulic system. Application instructions and requirements for hydraulic fluids should be taken from the following data sheets before the start of project planning.
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 unit 01 swash plate design, variable a10v mode of operation 02 pump, open circuit o size 03. Axial piston variable pump a10vso series 31 hydraulic fluids 5 filtration of the hydraulic fluid finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit. Linear motion and hydraulics assembly technologies servicepneumatics electric drives and controls features variable axial piston pump of swashplate design for hydro static drives in closed circuit the flow is proportional to the drive speed and displacement. The displacement is variable by means of a tilting swash plate. The directional control valve allows reversal of the direction of rotation or of movement at the user. Noise considerations presented by viral mehta a candidate for the degree of doctor of philosophy and hereby certify that in their opinion it is worthy of acceptance. In order to completely achieve the inphase change, the pressure that is assigned a fixed value. Axial piston unit 01 swashplate design, variable, nominal pressure 250 bar, maximum pressure 315 bar a10vs operation mode 02 pump, open circuit 0 size 03 geometric displacement 10 control device 04. The pistons and shoes move in and out of the cylinder because they are sliding upon a stationary, variable angle, swashblock. They are available with the option of a thrushaft for operating additional hydraulic pumps in series. Davies2 yiqin xue sushil kumar1 abstract it is known that an axial piston pump barrel experiences small oscillations due to forces acting over it. Sunday, apr 5, 2020 breaking news a microfisica do poder pdf.
Swashplate type axial piston pumps for open circuits in industrial vehicles. Pump design number 10 pfb20 30 pfb10 31 pvb10 and pvb15 20 all other models displacement control options pvb models only. For axial piston units with swashplate design, the pistons are arranged axially with respect to the drive shaft. A complete analysis of axial piston pump leakage and. The pump can work either selfpriming or with a charge pump. They are available as either variable pumps or constant pumps. Torque ripple attenuation for an axil piston swash plate. Reversing the angle of the swashplate reverses the flow of fluid from the pump, reversing the. Axial piston pumps have several pistons that are arranged parallel to the drive shaft.
Initially, equations to evaluate leakages in all piston pump gaps will be presented and tested against numerical models, later the equations will be linked to determine the general pressureflow pump dynamic characteristics. Md10v series is a family of variable displacement axial piston pumps for use in closed circuits. Multidisciplinary design optimization of a swashplate axial piston. Mannesmann variable displacement pump a2v re rexroth series 5. Pdf displacement control in variable displacement axial. Axial piston pump in swash plate design for hydrostatic drives in open circuit operation the. The flow is proportional to the drive speed and displacement. Nonlinear pressure control of selfsupplied variable. The vibration analysis of constant power regulated swash plate axial piston pumps was carried out. This novel waterpump could achieve change inphase between flow rate and the passage areas of the intake and outlet ports. Torque ripple attenuation for an axil piston swash plate type. Like all oilgear pumps, it thrives on lowviscosity fluids and comes in a variety of frame sizes and available displacement rates. The second possibility to control the volume o w of a pump is to change the displacement of the pump. From 25cc to 147cc with continuous pressures up to 310 bar, to fit a broad variety of applications and needs.
Stocked capacities from 14 to 64 cc 3 rev with rated continuous working pressures of 250 bar, peaking at 300 bar. Manring also investigated various valveplate slot geometries within an axial piston pump. The model is available as a double pump with a back to. Special control devices program for mobile applications, with di. Axial piston variable pump a1vo series 10 hydraulic fluid 5 filtration of the hydraulic fluid finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit. Axial piston variable pump a10vso data sheet series 31 sizes 18 to 140 nominal pressure 280 bar maximum pressure 350 bar open circuit features variable pump in axial piston swashplate design for hydro static drives in an open circuit the flow is proportional to the drive speed and the displace ment. Also observe the instructions for the other system components. The flow can be steplessly varied by adjusting the swashplate angle. Swashplate type axial piston pumps for open circuits in. In an axial piston pump, the pistons and cylinder rotate around the center, longitudinal axis. Axial piston variable pump a4vg data sheet series 32 size 28 to 250 nominal pressure 400 bar maximum pressure 450 bar closed circuit features variable axial piston pump of swashplate design for hydro static drives in closed circuit. In an open circuit, the hydraulic fluid flows from the reservoir to the hydraulic pump from where it is fed to the consumer, e. The vppl are variable displacement axialpiston pumps with variable swash plate, suitable for applications with open circuits and intermediate pressures. Technical information series 42 axial piston pumps.
Lpv axial piston closed circuit pumps technical information. Failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev. Variable displacement pump a2v series 5, for open, closed and semiclosed circuits axial piston unit, bent axis design brueninghaus hydromatik sizes 250. Series 42 axial piston pumps technical information manual. Recently, virtual prototyping technology for piston pumps has made great. Pistonpumpsunidirectionalreversiblecompactvariableaxial.
Series 45 open circuit axial piston pumps are available in a wide range of displacements. Axial piston double pump with variable displacement. Designed for the toughest demands of open circuit systems, our axial piston pumps offer the right displacements to meet your unique system needs. Axial piston variable pump a4vso data sheet series 10, 11 and 30 size 40. This is even more obvious if the pump is driven by a combustion engine.
Variable pump in axial piston swashplate design for hydrostatic drives in an open circuit the flow is proportional to the drive speed and the displacement. Gap flow simulation methods in high pressure variable. The displacement is continuously variable e\ phdqv ri d wlowlqj vzdvk sodwh dqg wkh rlo arz gluhfwlrq lv reversible. A variable displacement axial piston pump enables high pressure, high horsepower precision control in a compact package. Axial piston variable pump aa10vso usversion ra 92711a07. Md10v 1418 series is a family of variable displacement axial piston pumps for use in closed circuits with housing and distributor cover in aluminium. Further information on the a4vg axial piston variable pump, its installation and operation can be found in the rexroth documents listed in the following table. All models use the parallel axial piston slipper concept in conjunction with a tiltable swashplate to vary the pumps displacement. A variabledisplacement axialpiston pump enables high pressure, high horsepower precision control in a compact package in an axialpiston pump, the pistons and cylinder rotate around the center, longitudinal axis. To ensure the functional reliability of the axial piston unit, a gravimetric analysis of the hydraulic fluid is. The nominal pressure of the units is 400 bar and the maximum pressure is 450 bar absolute. Designed to be costeffective, stable and lowmaintenance, pvwj is a variabledisplacement axialpiston pump with a medium control response. Axial piston variable pump aa4vso series 10, 11 and 30 hydraulic fluid 3 hydraulic fluid prior to project planning, please refer to the detailed information in our data sheet 90223 hf hydraulic fluids concerning the choice of hydraulic fluids and application conditions.
In order to guarantee the functional reliability of the axial. Kpm swash plate type axial piston pumps programs for industrial vehicles. An axial piston pump is a positive displacement pump that has a number of pistons in a circular array within a cylinder block. Variable displacement axial piston pumps adjust the geometric output volume from maximum to zero. The pump is fitted mainly to the power takeoff on commercial. Variable axial piston pump of swashplate design for hydrostatic drives in closed circuit the flow is proportional to the drive speed and displacement. Series 90 axial piston pumps technical information general description p106 648e slider block servo piston servo arm displacement control cradle bearing charge pump swashplate cradle guide feedback linkage roller bearing shaft piston slipper valve plate cylinder block input shaft rear bushing bushing seal design series 90 pump crosssection. Excellent suction characteristics low noise level long service life. In addition pumps with seal option w and p, all pumps pv140 pv360 and pumps with xmodification x5830 bearing flushing port are equipped with a flushing port for front bearing and shaft seal. Therefore, it is beneficial to study the design method of piston pump. It can be used as a standalone pump, a hydraulic motor or an automotive air conditioning compressor. The slot geometries had constant area geometry, linearly varying geometry.
By adjusting the swash plate angle it is possible to in. The paper is focused on understanding the flow losses and the resulting flowpressure dynamics in a piston pump. Axial piston variable pump a10vo series 52 and 53 hydraulic fluids 5 hydraulic fluids the a10vo variable pump is designed for operation with hlp mineral oil according to din 51524. Innovative fluid power1 failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev. Axial piston variable pump aa4vso series 10, 11 and 30 for. A complete analysis of axial piston pump leakage and output flow ripples. Application instructions and requirements for hydraulic fluid selection, behavior during operation as well as dis. To ensure the functional reliability of the axial piston unit, a gravimetric analysis of the hydraulic fluid is necessary to. As the rotary group turns the pistons are pushed forwards and backwards. To ensure the functional reliability of the axial piston unit. Axial piston pumps have a circular piston group which rotates against an angled swash plate. Displacement v g max in cm3 18 28 45 63 85 control devices 04 electrohydraulic pressure control inverse proportional ip characteristic ed electrohydraulic pressure control proportional ip characteristic m m m m m er.
A complete analysis of axial piston pump leakage and output. Bosch rexroth axial piston variable pumps type a10vso. Flow is proportional to the drive speed and displacement. Oct 04, 2011 fixeddisplacement axial piston pumps, load sensing pumps and slanted axis pumps, in various configurations uni, iso, sae, for displacement sizes from 21 to cc and pressures up to 400 bars. The flow increases as the angle of the swashplate is adjusted from zero to its maximum value. In order to guarantee the functional reliability of the axial piston unit it is necessary to carry out a gravimetric evalua. The liebherr axial piston double pump dpvd series is developed for the open circuit in swash plate design. Axial piston single pumps revision history table of revisions date changed rev february 2020 added nfpe control options and changed document number from bc00000061 1003 may 2019 major update.
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