Pdf an inline axial piston swash plate pump with pressure compensator is widely used for its fast speed of response and power economy. The k3vl series swash plate type axial piston pumps are designed to satisfy the marine, mobile and industrial markets where a mediumhigh pressure variable displacement pump is required. Download the bosch rexroth variable displacement a10vo52 size 28 to 60 axial piston swashplate pump data sheet. Kpm swash plate type axial piston pumps programs for industrial vehicles displacement 60 cm3 double pump tandem type k3v63dt k5v80dt double pump parallel type k3v63dtp k5v80dtp single pump k3v63sk5v80s 80 a thorough function desigh enabled such atractive features 1. The shoeplate and the shoeplate bias spring hold the pistons against the swashplate, which is held stationary while the cylinder barrel is rotated by the prime mover.
The research object is an axial piston swash plate pump with full hydrostatic slipper bearing. Swashplate axial piston pump general descriptions the k3vl series swash plate type axial piston pumps are designed to satisfy the marine, mobile and industrial markets where a mediumhigh pressure variable displacement pump is required. Komatsu swash plate type piston pumps pdf manufactured by the company komatsu presented for you in electronic format page size 595 x 842 pts a4 rotated 0 degrees. Schematic diagram of an inline pump with variable swashplate angle. Pistons within the barrel are held on a tilted plate the swashplate. A series variable displacement piston pumps 25 1 2 5 10 20 50 100 200 300 single pumps double pumps variablefixed double pumps m o m o m o m o. Kr100773988b1 swash plate structure of swash plate axial. Install swash plate locator tool adjustment will take place in step 11. Functional description of regulator load sensing and pressure cutoff 14 torque limiter 15 torque limiter with power shift 17 3. H1 axial piston pumps single and tandem basic information. Torque ripple attenuation for an axil piston swash plate type.
Unlike previous research, this work develops a mathematical model for the friction based upon lubricating conditions which are described by the wellknown stribeck curve. Flange figure 1 pump operation in axial piston pumps, the pistons reciprocate parallel to the axis of rotation of the cylinder barrel. The pumping dynamics of swash plate piston pumps j. Tilting the swash plate to the opposite side of the neutral or zero displacement position reverses flow direction. Hydraulic pump motor division piston pump controls piston pump controls are integral valves that port flow to a stroking piston in response to a pressure or electronic signal, which results in a variable hydraulic pump. The mechanism is a combination of a cylinder block or rotor, with the piston fitted inside, and an angled swash plate. Torque ripple attenuation for an axil piston swash plate. Friction forces within the cylinder bores of swashplate. K3vg pumps are available in nominal displacements ranging from. Swash plate angle is generated by the hydraulic force of the pumping pistons and the mechanical force of the swash plate bias spring. Hydraulictraining axial piston units basic principles. Pvs piston pump thru shaft series features pvs0b8n3ke5737a volume. Danfoss axial piston variable displacement pumps are of swash plate design with variable.
Closed loop swash plate type axial piston pump k8v series. Var iable pump with axial piston rotary group in swashplate design for hydrostatic drives in open circuit. As the piston barrel assembly rotates, the pistons rotate around the shaft, with the piston shoes in contact with and sliding along the swash plate surface. Download the bosch rexroth aa10vso31 size 18 to 140 axial piston swashplate pump data sheet. Dynamic analysis of an axial piston pump swashplate control g. K3vk5v swash plate type axial piston pumps 60 cm3 80 110 140 200 280 displacement double pump tandem type double pump parallel type single pump k3v63dt k5v80dt k3v63dtp k5v80dtp k3v112dt k5v140dt k3v112dtp k5v140dtp k3v140dt k3v140dtp k5v200dt k5v200dtp k5v200dth k3v280dth. Contents applications product usage safety precautions handling precautions conversion factors, formula and definition general description and features specifications and features 1.
H3v series, swash plate type double piston pumps h3v series double axial type piston pumps specifications spline specifications model model abc d e h3v63 50. The university of cardiff axial piston pump leakage. K3vls series variable displacement type axial piston pump specifications and features 10 specizcations, general descriptions, and features 1. Test bench for measuring the interface between the barrel and port plate of a swash plate pump 18 fsp n. Pump displacement is mechanically controlled by the angle of the swash plate. Schematic diagram of servo valve with alternative orifice positions. High power density a lighter and more compact machine with higher. The swash plate structure used in the swash plate type axial piston hydraulic pump, which is a preferred embodiment proposed by the present invention, corresponds to a first fastening portion formed at one side of a discshaped edge and a position symmetrical with the first fastening portion about the disc.
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. There are two kinds of variabledisplacement axial piston pumps. As shown in the drawings, the conventional swash plate type hydraulic pump includes a valve block 121 having a suction port and a discharge port, through which compressed oil is sucked discharged, a pump case 122 and a pump case 123 on which the swash plates 116 and 117 and the pistons 118 and 119 are positioned symmetrically with respect to. In the components of leakage of slipperswash plate pair, the. The swash plate angle is controlled by the extension of the compensator plunger working against the swash plate bias spring. Numerous variations in the designs, performance ranges, and adjustment options offer ideal solutions for mobile and stationary applications. Series 20 axial piston pumps service manual danfoss.
Sae straight thread oring boss recommended installation position. Piston swash plate outlet flow can be varied by changing the shaft drive speed, or by changing the swash plate angle. Swash plate angle and hence pump displacement can easily be controlled remotely with the addition of a separate hydraulic cylinder. Pdf pressure compensator design for a swash plate axial piston. The axial piston pump drives a series of pistons aligned parallel with a shaft through a swashplate to pump a fluid. The main friction pairs of axial piston pump consist of cylinder blockvalve plate, pistonplunger chamber and piston shoesswash plate. The simplest type of axial piston pump is the swash plate inline design. Therefore, an improved swashplate control system based on asymmetricvalvecontrolled asymmetric piston scheme is presented as well, it is found to be an effective way to suppress the negative impact of swash plate torque on. This manual can be viewed on any computer, as well as zoomed and printed, makes it easy to diagnose and repair problems with your machines electrical system.
An experimental analysis of valve plate control diva. A thorough function desigh enabled such atractive features 3. In axial piston pumps, the cylinder block and drive shaft are on the same centerline and the pistons reciprocate parallel to the drive shaft. K8v series closedloop variable displacement type axial piston pump specifications, general descriptions, and features 10 1. Multidisciplinary design optimization of a swashplate axial piston. A common example of a swashplate application in a fluid pump is the compressor of a presentday automobile air conditioning system.
The swash plate block is a model of a swash plate mechanism used in axial piston hydraulic pumps and motors to convert translational motion of a piston into rotational motion of a drive shaft. As a result of the preliminary tests of the piston cylinder bore mechanism of the swash plate pump operational and structural restrictions, which influence the interfaces between pump s elements, were found. Pdf in this paper a mathematical model for swash plate axial piston pumps with conical cylinder blocks is presented. Consequently, the barrel rotation drives the pistons to translate in their bore and pump the uid. Swash plate piston pump axial flow variable displacement. A comparison is made between a theoretical model based. The flow is pr oportional to the drive speed and displacement. Screw spool a series variable displacement piston pumps features high efficiency. Swash plate oscillation in a variable displacement floating cup pump. Axial piston pumps convert the mechanical power generated by a motor rotation into hydraulic power.
Design and analysis of a swashplate control system for an. Friction forces within the cylinder bores of swashplate type. The major components are the swashplate, the axial pistons with shoes, the cylinder barrel, the shoeplate, the shoeplate bias spring, and the port plate. Characteristics of volumetric losses and efficiency of axial piston. Aug 25, 20 think first, then troubleshoot chapter 8. Model a10vso axial piston swashplate pump series 32 variable displacement, open circuit.
Swash plate slipper retainer piston assy spring, yoke return cylinder block port plate flow adj. The pump contains bearings and highspeed sliding parts including pistons with. Us3872775a swashplate bearings for axial piston pumps. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various.
In particular, a semicircular barrel swash plate stabilizes operation characteristics to ensure silent operation. The swash plate angle controls the output flow of the pump. As the force of the piston overcomes the driving force of the motor and the force of the spring, the face b of swash plate is pressed to the fixed face, making the swash plate tilt at a minimum angle. Swash plate inline hydraulic piston pump hydraulic pump. The invention provides means to resist piston thrust of an axial piston rotary pump motor as applied to a tiltable rotary swash plate. As a rule, in that kind of pumps a ball and socket joint that connects a piston body to a slipper, is coaxial with the piston body. In this video we have explained all the components of the pump and how each components contribute to its working, you can see how the flow can be varied usin. The simplest type of axial piston pump is the swash plate inline design figure 315. However, due to special design of vdaapp valve plate, the swash plate torque severely limits system dynamic response. The present hydraulic machine has reduced energy consumption compared to analogues. Series pvp variable volume piston pumps parker hannifin. In such a situation it is recommended that the pump is run for a short period on a more frequent basis even if it is just. Movement of the swash plate controls pump output from zero to maximum.
The flow can be infinit ely varied by adjusting the swashplate angle. Swash plate item 14 code position 4, 5, 6 part number description 018 6027351001 swashplate, swash sensor 018 6027351002 swashplate table 6. Pvm piston pumps pvm018020 pvm074081 service manual. In this research, the friction within the cylinder bore of a swashplate type axial piston machine is examined. This paper describes a study of the cylinder pressure and flow in an oil hydraulic axial piston pump. H1 pumps general specification axial piston closed circuit variable displacement pumps of cradle swashplate design with clockwise or counterclockwise direction of rotation. At the bulle location in switzerland, liebherr has been manufacturing axial piston pumps and motors in swashplate design for more than 40 years. Danfoss axial piston variable displacement pumps are of swash plate design with variable flow capability suitable for hydrostatic transmissions with closed loop. Swash plate inline hydraulic piston pump in this type, the axial reciprocating motion of the pistons is obtained by a swash plate that is either fixed or variable in its degree of angle. Us3872775a swashplate bearings for axial piston pumps or.
The k3vg series swash plate type axial piston pumps are designed to specifically satisfy the industrial open circuit market where noise, efficiency, controllability and extended pump life are considered to be essential. By varying the angle of the swashplate, the pistons stroke and, therefore, the compressors. Tribology in industry performance degradation analysis of aviation. Control of the pump s outlet flow is obtained by overriding the force of the pumping pistons and bias spring with the hydraulic force of the servo piston.
A mathematical model is formulated for a 9 piston swash plate pump with conical cylinder block in order to evaluate the dynamic loads on the drive shaft. Axial piston pumps in swash plate and bent axis design are intended for the medium and high pressure range. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an in. In bent axis axial piston pumps a shaft rotates a cylinder block with pistons, while the commutation unit and pressure ports are. The a series variable displacement piston pumps are high efficiency swash plate type piston pumps developed using yukens unique technology to meet customers needs for. Specizcations relief valve 14 pressure cutoff charge pump 15 22. Danfoss axial piston variable displacement pumps are of swash plate design with variable flow capability suitable for hydrostatic transmissions with closed loop circuit. The motor rotational motion is transmitted to a barrel by a shaft. Kpm swash plate type axial piston pumps programs for industrial vehicles out of a wide variety of our swash plate type axial piston pumps, we introduce below those most suitable for construction machines with open circuits. Pdf vibration analysis of constant power regulated swash. A mathematical model of an axial piston pump is described which consists of a secondorder differential equation of the swashplate motion and two firstorder. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various pressure. An axial piston swash plate pump with improved energy and dynamic characteristics was designed 2. The said means comprises a ring of several hydrostatic thrust pads pressurised from the pump motor working pressure via impedances and applying hydraulic pressure to an annular plate on the base of the swash plate.
To use the product safely, you must carefully read all warnings and cautions in this manual. The simplest type of axial piston pump is the swash plate. Gap flow simulation methods in high pressure variable. In this lesson well examine both fixed and variable displacement axial, bent axis, radial, and rotating cam radial piston pumps. You must also observe the related regulations and rules regarding. An alternative form of axial piston pump is the bent axis pump. Swashplate axial piston pump k3vl b series general descriptions the k3vl series swash plate type axial piston pumps are designed to satisfy the marine, mobile and industrial markets where a mediumhigh pressure variable displacement pump is required. An alternative form of axial piston pump is the bent axis pump of figure 2. Kpm swash plate type axial piston pumps programs for industrial vehicles. Hydraulic pump motor division piston pump controls piston pump controls are integral valves that port flow to a stroking piston in response to a pressure or electronic signal, which results in a variable hydraulic pump achieving a desired displacement.
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