Dynamic vibration analysis of a swashplate type water hydraulic motor. Pdf displacement control in variable displacement axial piston. Us5630707a variable displacement mechanism for swash plate. Two position displacement control 14 electric control 15 32. A 75cm3rev swash plate type axial piston pump was modi. 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. Swash plate in a singlepiston, isothermal axial piston.
Modeling of hydraulic axial piston pumps including specific. The working principles is similar to crankshaft, scotch yoke, or wobblenutatorzcrank drives, in engine designs. Toyota industries corporation was founded in 1926 by sakichi toyoda to manufacture and sell the automatic looms which he had invented. 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.
Figure 39 illustrates a vane pump with a circular interior. 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. Pdf dynamic vibration analysis of a swashplate type. Feb 11, 2014 hi guys, hydraulic pumps are of various types, axial flow variable displacement piston pump are used in heavy hydraulic construction equipments. 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. To use the product safely, you must carefully read all warnings and cautions in this manual. Hydraulic pumpmotor division positive displacement pumps. Swashplate type axial piston pumps for open circuits in. Therefore, the decision of the products suitability to the system considered must be made by the. Torque ripple attenuation for an axil piston swash plate type. 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. Proportional displacement control 16 electric proportional control 17. The variableangle swash plate pump has been a reliable way to transmit fluid power for over 120 years.
The adoption of the highload bearings and frictionfree. A slotted rotor is fixed to a shaft that enters the pumphousing cavity through one of its end plates. Movement of the swash plate controls pump output from zero to maximum. Stable swash plate design the swash plate, a semicylindrical design concept, is an advancement to the conventional type. Ep1519006b1 swash plate type hydraulic pump or motor. 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. Dynamic vibration analysis of a swash plate type water hydraulic motor. The pump shaft rotation determines flow direction, but you only test the pump in one direction, determined by the universal dynamometer. The swash plate of the pump is operated with a heavy spring and a piston. The slipper pad is an improvement on the swash plate which provides higher pressure. Danfoss recommends clamp type couplings for applications with radial shaft loads. Specications relief valve 14 pressure cutoff charge pump 15 22. Reduction gear a case rotation type simple planetary reduction gear is adopted.
Us5630707a variable displacement mechanism for swash. Specications relief valve 14 pressure cutoff charge pump. The basics of variable displacement pump controls crossco. We choose a multipiston axial swashplate pump type wpto210 11, whose simplified diagram is shown in fig. 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.
A common example of a swashplate application in a fluid pump is the compressor of a presentday automobile air conditioning system. Failure analysis a guide to analyzing axial piston pump failures oilgear company milwaukee, usa 80776, rev. Overview of variable displacement axial piston pump type v40m. Pump type graphic symbol page mpa geometric displacement cm3rev. General operating manual for the assembly, initial operation and maintenance of hydraulic.
Danfoss recommends clamptype couplings for applications with radial shaft loads. Specizcations relief valve 14 pressure cutoff charge pump 15 22. Swash plate outlet flow can be varied by changing the shaft drive speed, or by changing the swash plate angle. Their use is limited to noncorrosive fluids because the working fluid also provides lubrication to the hydrodynamic bearings. In a variable displacement pump, we vary the angle of the rotating group, which is done by tilting the swash plate. Active pressure ripple control in axial piston pumps. 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. Swashplate type axial piston pumps for open circuits in industrial. The driving shaft rotates the cylinder barrel, swash plate and pistons. Axial piston pumps archives kawasaki precision machinery.
Vanetype hydraulic pumps generally have circularly or elliptically shaped interiors and flat end plates. You must also observe the related regulations and rules regarding. 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. Torque on the cylinder block of an axialpiston swashplate type hydrostatic pump noah denver manring iowa state university follow this and additional works at. 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 flow is developed as the pump rotating group is. Vibration analysis of constant power regulated swash plate. 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. It was originally invented to replace a crankshaft, and.
K8v series closed loop swash plate type axial piston pump specifications, general descriptions, and features 10 1. Swash plate inline hydraulic piston pump hydraulic pump. The swash plate block models a single, pistonactuated swash plate within an axialpiston pump. A swashplate also known as slant disk was invented by anthony george maldon michell in 1917. 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. Torque on the cylinder block of an axialpiston swashplate. 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. 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. Application of simulationx based optimization technique to. 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.
Typical type is variable piston pumps hydraulic pump basics. On application usage of the products the operating conditions of the products shown in this catalog vary depending upon each application. Torque ripple attenuation for an axil piston swash plate. You can connect multiple swash plate blocks to multiple pistons. By varying the angle of the swashplate, the pistons stroke and, therefore, the compressors. Each line consists of a swash plate model followed by slipper pad, piston and the cylinder oil volume. Multidisciplinary design optimization of a swashplate axial. High power density a lighter and more compact machine with higher. K8v series closedloop variable displacement type axial piston pump specifications, general descriptions, and features 10 1. Torque ripple attenuation for an axil piston swash plate type core. Closed loop swash plate type axial piston pump k8v series. A 75cm 3 rev swash plate type axial piston pump was modi. In particular, the double pump with its tandem arrangement, has eliminated a power divider, has an increased transmission efficiency, and is lighter.
Axial piston pump according to the swash plate principle. K3vls series swash plate type axial piston pump specifications, general descriptions, and features 10 1. 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. An arrangement of a swash plate pump is shown in figure 6. The swash plate model can only drive one of the 9 pistons with specific phase offset. The swash plate pump is a positive displacement pump. K3vl pumps are available in nominal displacements ranging from 28 to 200 cm3rev with various. Swashplate type axial piston pumps for open circuits in industrial vehicles. Pressure compensation reduced flow after reaching set pressure. Pressure compensated control is the most basic control for a variable stroke piston pump. In addition to the innovative form, the swash plate adopts special bearings, to control radial motion to further increase efficiency. The vibration analysis of constant power regulated swash plate axial piston pumps was carried out. Pdf in this paper a mathematical model for swash plate axial piston pumps.
Types of compressor and structure swash plate type fixed. K3vl pumps are available in nominal displacements ranging. In for instance a slipper type pump, this condition can be realised. The swash plate and slipper pad designs are both axial cylinder pumps. High speed realtime controllers were proposed and realized using an national instrument labview field programmable. 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. Functional description of regulator load sensing and pressure cutoff 14 pressure cutoff 15 torque limiter 16. 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 fixed swashplate is held between the opposing ends of the double piston by a pair of shoes and two steel balls.
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. A linearized model was developed and used to investigate the effect of operating parameters on. A number of small rectangular plates or vanes are set into the slots of the rotor. Kpm swash plate type axial piston pumps programs for industrial vehicles. Modeling of hydraulic axial piston pumps including. 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. It is a mechanical engineering device used to translate the motion of a rotating shaft into reciprocating motion, or vice versa. Application of simulationx based optimization technique. Part of theagriculture commons,bioresource and agricultural engineering commons, and the mechanical engineering commons.
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 computational model of axial piston swashplate pumps. The axial piston pump drives a series of pistons aligned parallel with a shaft through a swashplate to pump a fluid. The swash plate oscillation creates an additional displacement of the pump, especially. Swash plate piston pump axial flow variable displacement. There are two kinds of variabledisplacement axial piston pumps. 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. Out of a wide variety of our swash plate type axial piston pumps. 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. 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. 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. In 1994, kaliafetis and costopoulos 1 studied the static and dynamic characteristics of a standard variable geometric volume swash plate pump with pressure regulator. At this point the model chain breaks up into 9 individual lines in parallel.
Pdf dynamic vibration analysis of a swashplate type water. Swash plate oscillation in a variable displacement floating cup pump. M7v series swash plate type axial piston motor specifications and features 8 1. Swash plate in a singlepiston, isothermal axial piston pump. Outboard pump inboard pump outboard pump inboard pump a37 a16 a56 a10 a1637 aseries variable displacement piston pumps. It has a fixed displacement axial piston assembly that delivers a given volume of fluid oil for each full rotation of the pump shaft. 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. 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. 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. Motor standard component counterbalance valve standard component for all models. Due to many advantages, swash plate pumps are wide spread in hydraulic systems.