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. Torque on the cylinder block of an axialpiston swashplate type hydrostatic pump noah denver manring iowa state university follow this and additional works at. Complete patent searching database and patent data analytics services. Therefore, the decision of the products suitability to the system considered must be made by the. Overview of variable displacement axial piston pump type v40m. A common example of a swashplate application in a fluid pump is the compressor of a presentday automobile air conditioning system. 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. Pdf dynamic vibration analysis of a swashplate type. You must also observe the related regulations and rules regarding.
Application of simulationx based optimization technique to. A swashplate also known as slant disk was invented by anthony george maldon michell in 1917. Typical type is variable piston pumps hydraulic pump basics. The swash plate of the pump is operated with a heavy spring and a piston. The swash plate block models a single, pistonactuated swash plate within an axialpiston pump. Danfoss recommends clamptype couplings for applications with radial shaft loads. A number of small rectangular plates or vanes are set into the slots of the rotor. Toyota industries corporation was founded in 1926 by sakichi toyoda to manufacture and sell the automatic looms which he had invented. General operating manual for the assembly, initial operation and maintenance of hydraulic. The fixed swashplate is held between the opposing ends of the double piston by a pair of shoes and two steel balls. K3vls series swash plate type axial piston pump specifications, general descriptions, and features 10 1.
Danfoss recommends clamp type couplings for applications with radial shaft loads. You can connect multiple swash plate blocks to multiple pistons. Axial piston pump according to the swash plate principle. Each line consists of a swash plate model followed by slipper pad, piston and the cylinder oil volume. An opposing type swash plate hydraulic pump or motor possessing not one swash plate, but instead a pair of swash plates, has been proposed in jp 50115304 a as a way to make it possible to reduce the size of a hydraulic pump or a hydraulic motor. Us5630707a variable displacement mechanism for swash. M7v series swash plate type axial piston motor specifications and features 8 1. Movement of the swash plate controls pump output from zero to maximum. A variable displacement mechanism for a swash plate hydraulic pump or motor, in which a swash plate, a swash plate guiding wall, a tilting control piston, and a swash plate tilting guiding and swash plate rotation preventing pin are included for varying the requiring flow rate volumetric displacement per revolution without the rotation of the swash plate even during the tilting of the swash. Pdf displacement control in variable displacement axial piston. The swash plate model can only drive one of the 9 pistons with specific phase offset. Multidisciplinary design optimization of a swashplate axial. Functional description of regulator load sensing and pressure cutoff 14 pressure cutoff 15 torque limiter 16.
The driving shaft rotates the cylinder barrel, swash plate and pistons. Swash plate piston pump axial flow variable displacement. K8v series closed loop swash plate type axial piston pump specifications, general descriptions, and features 10 1. To use the product safely, you must carefully read all warnings and cautions in this manual. The mechanism of a variable wobble plate compressor the preferred configuration for a piston compressor soon moved to a double acting swashplate design of which the harrison delphi hd6 is typical.
K8v series closedloop variable displacement type axial piston pump specifications, general descriptions, and features 10 1. It was originally invented to replace a crankshaft, and. Types of compressor and structure swash plate type fixed. The variableangle swash plate pump has been a reliable way to transmit fluid power for over 120 years. Torque ripple attenuation for an axil piston swash plate type core. Figure 39 illustrates a vane pump with a circular interior. Application of simulationx based optimization technique. Us5630707a variable displacement mechanism for swash plate. In a variable displacement pump, we vary the angle of the rotating group, which is done by tilting the swash plate. 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. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various. By varying the angle of the swashplate, the pistons stroke and, therefore, the compressors. Specications relief valve 14 pressure cutoff charge pump 15 22. Hydraulic pumpmotor division positive displacement pumps.
The displacement is controlled by varying the swash plate angle which in turn varies the piston travel through a stroke, thus resulting in variable flow. Modeling of hydraulic axial piston pumps including. Vanetype hydraulic pumps generally have circularly or elliptically shaped interiors and flat end plates. Reduction gear a case rotation type simple planetary reduction gear is adopted. Torque ripple attenuation for an axil piston swash plate.
Pressure compensation reduced flow after reaching set pressure. An arrangement of a swash plate pump is shown in figure 6. Hydraulic flow is developed as the pump rotating group is. Torque on the cylinder block of an axialpiston swash plate type hydrostatic pump noah denver manring iowa state university follow this and additional works at. Pressure compensated control is the most basic control for a variable stroke piston pump.
Closed loop swash plate type axial piston pump k8v series. The swash plate and slipper pad designs are both axial cylinder pumps. Due to many advantages, swash plate pumps are wide spread in hydraulic systems. Active pressure ripple control in axial piston pumps. Swash plate outlet flow can be varied by changing the shaft drive speed, or by changing the swash plate angle. Modeling of hydraulic axial piston pumps including specific. Kpm swash plate type axial piston pumps programs for industrial vehicles. 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. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an in. A 75cm3rev swash plate type axial piston pump was modi. Proportional displacement control 16 electric proportional control 17. K3vl pumps are available in nominal displacements ranging.
In addition to the innovative form, the swash plate adopts special bearings, to control radial motion to further increase efficiency. Efforts have been made to digitize the mechanism with feedback and electronic control, but the underlying principle has limited benefits. Contact your danfoss representative for an evaluation of unit bearing life if you have continuously applied external loads exceeding 25 % of the maximum allowable radial load re or the pump swashplate is positioned on one side of center all or most of the time. Torque on the cylinder block of an axialpiston swashplate. V90n swashplate type axial piston double pump series 0112 technical data 02 type introduction 0304 control principle e1 electroproportional displacement control principle 05 h1h2h3 negative flow control schematic 0506 installation size v90n type 07 v90n 180 type 08. 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. The vibration analysis of constant power regulated swash plate axial piston pumps was carried out. Axial piston pumps archives kawasaki precision machinery. 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. A slotted rotor is fixed to a shaft that enters the pumphousing cavity through one of its end plates.
The working principles is similar to crankshaft, scotch yoke, or wobblenutatorzcrank drives, in engine designs. It is a mechanical engineering device used to translate the motion of a rotating shaft into reciprocating motion, or vice versa. It has a fixed displacement axial piston assembly that delivers a given volume of fluid oil for each full rotation of the pump shaft. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an increased transmission efficiency, and is lighter. In for instance a slipper type pump, this condition can be realised. Dynamic vibration analysis of a swashplate type water hydraulic motor. 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.
Specizcations relief valve 14 pressure cutoff charge pump 15 22. Their use is limited to noncorrosive fluids because the working fluid also provides lubrication to the hydrodynamic bearings. There are two kinds of variabledisplacement axial piston pumps. 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. In 1994, kaliafetis and costopoulos 1 studied the static and dynamic characteristics of a standard variable geometric volume swash plate pump with pressure regulator. Swashplate type axial piston pumps for open circuits in industrial vehicles. Pump type graphic symbol page mpa geometric displacement cm3rev maximum operating pressure outboard pump inboard pump outboard pump inboard pump a37 a16 a56 a10 a1637 aseries variable displacement piston pumps. The basics of variable displacement pump controls crossco. This pump is classified into swash plate type and bentaxis type ones according to the association between the driving axle and the cylinder block into which seven or nine pistons are inserted. Dynamic vibration analysis of a swash plate type water hydraulic motor. Out of a wide variety of our swash plate type axial piston pumps. Part of theagriculture commons,bioresource and agricultural engineering commons, and the mechanical engineering commons. The swash plate oscillation creates an additional displacement of the pump, especially.
Swash plate in a singlepiston, isothermal axial piston. Outboard pump inboard pump outboard pump inboard pump a37 a16 a56 a10 a1637 aseries variable displacement piston pumps. The adoption of the highload bearings and frictionfree. Pdf in this paper a mathematical model for swash plate axial piston pumps. Prevents the motor from overrunning on a down slope.
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. 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. Torque on the cylinder block of an axialpiston swash. The swash plate pump is a positive displacement pump. Piston motor swash plate type basic characteristics. 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. Shaft loading and bearing life conversion factors, formula and definition 8 k3vls series swash plate type axial piston pump specifications and features 10 specications, general descriptions, and features 1. The slipper pad is an improvement on the swash plate which provides higher pressure. On application usage of the products the operating conditions of the products shown in this catalog vary depending upon each application. Specications relief valve 14 pressure cutoff charge pump. A 75cm 3 rev swash plate type axial piston pump was modi. High speed realtime controllers were proposed and realized using an national instrument labview field programmable. Two position displacement control 14 electric control 15 32. Vibration analysis of constant power regulated swash plate.
Motor standard component counterbalance valve standard component for all models. 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. High power density a lighter and more compact machine with higher. Contact your danfoss representative for an evaluation of unit bearing life if you have continuously applied external loads exceeding 25 % of the maximum allowable radial load re or the pump swash plate is positioned on one side of center all or most of the time. Active vibration control of swash platetype axial piston.
Failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev. 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. Swash plate oscillation in a variable displacement floating cup pump. Pdf dynamic vibration analysis of a swashplate type water. A computational model of axial piston swashplate pumps. 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. Stable swash plate design the swash plate, a semicylindrical design concept, is an advancement to the conventional type. Torque ripple attenuation for an axil piston swash plate type. 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. Swash plate inline hydraulic piston pump hydraulic pump. Swash plate in a singlepiston, isothermal axial piston pump. Feb 11, 2014 hi guys, hydraulic pumps are of various types, axial flow variable displacement piston pump are used in heavy hydraulic construction equipments. The swash plate is controlled by the pressurecompensated valve, which uses pressure feedback so that the instantaneous output flow of the pump is exactly enough to maintain a presetting pressure.
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. On application usage of the products the operating conditions of the products shown in this catalog vary depending. Swashplate type axial piston pumps for open circuits in industrial. 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. A linearized model was developed and used to investigate the effect of operating parameters on. The pump shaft rotation determines flow direction, but you only test the pump in one direction, determined by the universal dynamometer. We choose a multipiston axial swashplate pump type wpto210 11, whose simplified diagram is shown in fig. At this point the model chain breaks up into 9 individual lines in parallel. When highpressure oil supplied from the pump flows into the cylinder block through the valve plate, the swash plate is pushed by the force of the piston assembly. The k3vl series swash plate type axial piston pumps are designed to satisfy a variety of construction and offhighway applications where a medium to high pressure variable displacement pump is required. Pump type graphic symbol page mpa geometric displacement cm3rev.
Ep1519006b1 swash plate type hydraulic pump or motor. Since then toyota industries has diversified and expanded the scope of its business domains to include textile machinery, automobiles vehicles, engines, car airconditioning compressors, etc. Swashplate type axial piston pumps for open circuits in. 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.
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