An axial piston pumpmotor having variable tilt angles swashplate stroke control and rotary portface hydraulic distribution control, characterized by a rotary swashplate member in which pistonthrust torque reaction and developed torque on the rotary swashplate member is transmitted directly to a rotary main driving shaft by spherically. Swashplate type axial piston pumps for open circuits in. The interface between the slipperswash plate is one of the most important frication pairs in axial piston pumps. Part of theagriculture commons,bioresource and agricultural engineering commons, and the mechanical engineering commons. 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. Swash plate axial piston pump k7vg series general descriptions reliable highpressure and longlife type this series of highpressure, swash plate type pumps was developed for general industrial machinery use and is based upon our long and rich experience. Hydraulic pumpmotor division hydraulic flow is developed as the pump rotating group is driven by a prime mover hydraulic pump basics fluid is forced out of pump at the pump outlet a partial vacuum is created at the pump inlet and atmospheric pressure forces fluid into pump from the reservoir. In this paper, a novel pump prototype is designed and a test rig is set up to study the dynamic lubricating performance of the slipperswashplate interface in axial piston machines. The pump shaft rotation determines flow direction, but you only test the pump in one direction, determined by the universal dynamometer.
Pdf multidisciplinary design optimization of a swash. Swash plate pumps have a rotating cylinder containing pistons. Us3911791a swashplate drive for axial piston pumps. Functional description of regulator load sensing and pressure cutoff 14 pressure cutoff 15 torque limiter 16. Torque on the cylinder block of an axialpiston swash. Movement of the swash plate controls pump output from zero to maximum.
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. The pistons move within the cylinder bores when the shaft rotates, dependent on the swivel angle. Numerous variations in the designs, performance ranges, and adjustment options offer ideal solutions for mobile and stationary applications. Pvm piston pumps pvm018020 pvm074081 service manual. Axial piston pumps in swash plate and bent axis design are intended for the medium and high pressure range. K3vls series swash plate type axial piston pump specifications, general descriptions, and features 10 1. 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. An axial piston pump motor having variable tilt angles swash plate stroke control and rotary portface hydraulic distribution control, characterized by a rotary swash plate member in which piston thrust torque reaction and developed torque on the rotary swashplate member is transmitted directly to a rotary main driving shaft by spherically. The rotating displacement pistons are supported by a swashplate. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an increased transmission efficiency, and is. Therefore, the decision of the products suitability to the system considered must be made by the.
A 75cm3rev swash plate type axial piston pump was modi. As a result they vary the ow rate that is provided to the consumers. Hydraulictraining axial piston units basic principles. Specizcations relief valve 14 pressure cutoff charge pump 15 22. The adoption of the highload bearings and frictionfree. It has a fixed displacement axial piston assembly that delivers a given volume of fluid oil for each full rotation of the pump shaft. Failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev.
Axial piston units title index open circuit the way to the complete hydraulic system. Axial piston pumps, bent axis and swashplate piston pumps. Flow is proportional to the drive speed and displacement. Pdf multidisciplinary design optimization of a swashplate. A complete analysis of axial piston pump leakage and output. Model a10vso axial piston swashplate pump series 32 variable displacement, open circuit. Particularly suitable for operation with hfc hydraulic fluids. An alternative form of piston pump is the axial design of figure 2. Swash plate 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. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an in. Download the bosch rexroth variable displacement a10vo52 size 28 to 60 axial piston swashplate pump data sheet.
Swash plate inline hydraulic piston pump hydraulic pump. Each piston can be kept in contact with the swash plate by springs or by a rotating shoe plate linked to the swash plate. They are characterized by low noise emission, short response time and flexible operation thanks to the wilde range of mechanical controls, see section. Download the bosch rexroth aa10vso31 size 18 to 140 axial piston swashplate pump data sheet. Damtewthe control torque on the swash plate of an axial piston pump utilizing pistonbore springs j. Therefore, an improved swashplate control system based on asymmetricvalvecontrolled asymmetricpiston scheme is presented as well, it is found to be an effective way to suppress the negative impact of swash plate torque on. Pistons fitted to bores in the cylinder barrel are connected through piston shoes and a shoe plate, so that the shoes bear against an angled swash plate. K8v series closedloop variable displacement type axial piston pump specifications, general descriptions, and features 10 1. A direct displacement control uses a mechanical lever attached to the swashplate of the axial piston pump. The axial piston pump drives a series of pistons aligned parallel with a shaft through a swashplate to pump a fluid.
Innovative fluid power1 failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev. The pistons are stroked by a fixed angled plate called the swash plate. Us4690036a axial piston pump or motor with multi position. However, due to special design of vdaapp valve plate, the swash plate torque severely limits system dynamic response. 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. Closed loop swash plate type axial piston pump k8v series. 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. The present hydraulic machine has reduced energy consumption compared to analogues.
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 using the swash plates and how the pistons. The n series pump, which was used widely as a piston pump especially for construction machines, has been modified to. In general, the swash plate design is used for pumps and the bent axis design for motors although there are applications where this is not the best solution. Damtewthe control torque on the swash plate of an axial piston pump utilizing piston bore springs j. Active vibration control of swash platetype axial piston. Torque on the cylinder block of an axial piston swash plate type hydrostatic pump noah denver manring iowa state university follow this and additional works at. Axial piston closed circuit variable displacement pump of cradle swashplate design with clockwise or. Swashplate type axial piston pumps for open circuits in industrial vehicles. A linearized model was developed and used to investigate the effect of operating parameters on. A common example of a swashplate application in a fluid pump is the compressor of a presentday automobile air conditioning system. It translates linear actuation into rotational motion that, when connected to the valve plate orifice il block, periodically connects the piston with the pump intake and discharge. 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. The swash plate block models a single, piston actuated swash plate within an axial piston pump.
The swash plate pump is a positive displacement pump. Variable pump with axial piston rotary group in swashplate design for hydrostatic drives in open circuit. Torque on the cylinder block of an axialpiston swashplate. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various. Hydraulic pump motor division piston pump controls piston pump controls are integral valves that port. The axial piston pump type v30d is designed for open circuits in industrial. 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. Variable displacement piston pump hydraulic pump basics bias spring shaft barrel piston swash plate outlet flow can be varied by changing the shaft drive speed, or by changing the swash plate angle. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various pressure.
Vibration analysis of constant power regulated swash plate. Design and analysis of a swashplate control system for an. Swashplate axial piston pump k7vg series general descriptions reliable highpressure and longlife type this series of highpressure, swashplate type pumps was developed for general industrial machinery use and is based upon our long and rich experience. Application of simulationx based optimization technique.
In 1994, kaliafetis and costopoulos 1 studied the static and dynamic characteristics of a standard variable geometric volume swash plate pump with pressure regulator. An axial piston swash plate pump with improved energy and dynamic characteristics was designed 2. Axial piston variable pump aa4vso series 10, 11 and 30 for. This video gives a basic understanding of working of swash plate pumps. Jan 08, 2017 this video gives a basic understanding of working of swash plate pumps. Swash plate angle changing device for swash plate type piston pump motor ep0793018a4 en 19941018. Hydraulic pumpmotor division piston pump controls piston pump controls are integral valves that port.
The swash plate block models a single, pistonactuated swash plate within an axialpiston pump. Swash plate in a singlepiston, isothermal axial piston pump. Contents applications product usage safety precautions handling precautions conversion factors, formula and definition general description and features specifications and features 1. Tilting the swash plate to the opposite side of the neutral or zero displacement position reverses flow.
High speed realtime controllers were proposed and realized using an. Danfoss axial piston variable displacement pumps are of swash plate design with variable flow capability suitable for hydrostatic transmissions with closed loop circuit. On application usage of the products the operating conditions of the products shown in this catalog vary depending upon each application. The vibration analysis of constant power regulated swash plate axial piston pumps was carried out. Application of simulationx based optimization technique to. Torque on the cylinder block of an axialpiston swashplate type hydrostatic pump noah denver manring iowa state university follow this and additional works at.
Axial piston pumps are widely used throughout the mobile and industrial sectors. By varying the angle of the swashplate, the pistons stroke and, therefore, the compressors. Us3911791a swashplate drive for axial piston pumpsmotors. You can connect multiple swash plate blocks to multiple pistons. The cylinder barrel in this pump is turned by the drive shaft. The test of this interface in a real pump is very challenging. The flow can be infinitely varied by adjusting the swashplate angle. 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. K8v series closed loop swash plate type axial piston pump specifications, general descriptions, and features 10 1. There are two kinds of variabledisplacement axial piston pumps. Specications relief valve 14 pressure cutoff charge pump 15 22.
These oscillation forces and resulting moments introduce vibrations to all pump parts, especially to the swash plate and the pump housing. Kpm swash plate type axial piston pumps programs for industrial vehicles. Swash plate angle changing device for swash plate type piston pump motor us61749b1 en 19961105. They are generally the pump of choice for flows over 5lmin and up to 415 bar, if budgets allow. As the barrel turns, the piston shoes follow the swash plate. Axial piston pumps variable displacement, mechanical controls pvpc variable displacement axial piston pumps with swash plate design suited for high pressure open circuits. In this work, an mdo multidisciplinary design optimization of a swashplate axial piston pump is conducted based on simulation technology and integrated optimization. Swash plate 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. 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. The n series pump, which was used widely as a piston pump especially for construction machines, has been modified to the k3v series, meeting the presentday. The vibration of the swash plate in an axial piston pump with conical cylinder block was studied, the effects of working conditions and design parameters on the vibration were analyzed 10. Swash plate angle changing device for swash plate type piston pump motor us61749b1 en 1996.
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. Swash plate in a singlepiston, isothermal axial piston. H1 pumps general specification axial piston closed circuit variable displacement pump of cradle swash plate design with clockwise or counterclockwise direction of rotation. These pumps are commonly used in steering gear system. The angle of the cylinder block determines the piston stroke. Axial piston pump, swash plate, model introduction modeling of the conventional swash plate axial piston pumps was the focus of many studies in the last decade. The directional control valve allows reversal of the direction of rotation or of movement at the user. Nov 15, 2017 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 using the swash plates and how the pistons.
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