Flow Divider - Hansa Divider.pdf · FLOW DIVIDER WITH MOTOR KV- 0 DFV + 0M FLOW DIVIDER WITH PHASE...

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HYDRAULIC COMPONENTSHYDROSTATIC TRANSMISSIONS

GEARBOXES - ACCESSORIES

HT 22 / A / 201 / 0605 / E

Flow Divider




As HANSA-TMP has a very extensive range of products and some products havea variety of applications, the information supplied may often only apply to specificsituations. If the catalogue does not supply all the information required, pleasecontact HANSA-TMP. In order to provide a comprehensive reply to queries we may require specific data regarding the proposed application.

Whilst every reasonable endeavour has been made to ensure accuracy, thispublication cannot be considered to represent part of any contract, whetherexpressed or implied.HANSA-TMP reserves the right to amend specifications at their discretion.

Poichè HANSA-TMP offre una gamma di prodotti molto estesa ed alcuni di questivengono impiegati per più tipi di applicazioni, le informazioni riportate possonoriferirsi solo a determinate situazioni. Se nel catalogo non sono riportati tutti i datinecessari, si prega di contattare HANSA-TMP.Al fine di poter fornire una risposta esauriente potrà rendersi necessaria larichiesta di dati specifici riguardanti l'applicazione in questione.

Questo catalogo, pur essendo stato approntato con particolare riguardo allaprecisione dei dati riportati, non consiste parte di alcun contratto espresso oimplicito.HANSA-TMP si riserva il diritto di apportare qualsiasi modifica ai dati riportati.

HT 22 / A / 201 / 0605 / E Pag.1

Flow divider

CONTENTS

General Informations page 2

Flow dividers group 0 - Red Series page 3

Flow dividers group 1 - Green Series page 7

Flow dividers group 2 - Yellow Series page 11

General structure of divider codes page 15

Examples of Group 0 divider coding page 18



Hydraulic diagrams of flow dividers page 21

Diagrams of systems with flow dividers page 23

Pag. 2 HT 22 / A / 201 / 0605 / E

Flow dividerGeneral InformationsSummary description of flow dividers.

A flow divider is made up of two or more modular elements (sections) with gearsmechanically linked by an internal shaft that causes them to turn at the same speed.Unlike multiple pumps, in which the input power is mechanical (shaft connected to amotor), in a flow divider the input power is of a fluid-mechanical nature, i.e. a flowof oil under pressure parallelly supplies the modular elements, which are in turnconnected to the hydraulic circuits serving the users.The portion of flow utilized by each element is solely determined by its nominal flowrate. Therefore, unlike standard static dividers with variable ports, the flow dividersdo not cause dissipation and are also much more precise.The use of flow dividers in a system reduces the number of pumps necessary aswell as the associated individual mechanical power takeoffs and complexmechanical couplers ( with greater losses ).

Most frequent applications of flow dividers:Supply of two or more independent hydraulic circuits by means of a single pump,with an overall flow rate equal to the sum of the flow rates.

Examples of this kind of application:´ lifting platforms and bridges;´ hydraulic bending presses and shearing machines;´ hoisting of freight containers;´ lubrication systems;´ hydraulic opening / closing of gates;´ automatic hydraulically-driven machines;´ actuation of formwork for construction;´ wood processing machinery;´ conveyance of trolleys driven by hydraulic cylinders or motors;´ equipment for the food industry;´ mil itary installations.

Sizes of flow dividersThe first classification of flow dividers is made according to size; they may bedivided into three groups:

´ Group 0 : comprises dividers with small powers and dimensions, displacements ranging from 0,24 to 2,28 cm3 / revolution.´ Group 1 : comprises dividers with medium powers and dimensions, displacements ranging from 0,91 to 9,88 cm3 / revolution.´ Group 2 : is characterized by higher powers and dimensions and displacements ranging from 4.2 to 39,6 cm3 / revolution.

Flow dividers with and without valvesThe flow dividers may be supplied with or without phase correction valves that correct anysmall phase errors occurring in each cycle between two or more hydraulic cylinders.

HT 22 / A / 201 / 0605 / E Pag.3

Flow divider

KV-O DFFLOW DIVIDER

KV-O DFVFLOW DIVIDER WITH PHASECORRECTION VALVES

KV-0 DF+0MFLOW DIVIDER WITH MOTOR

KV-0 DFV+0MFLOW DIVIDER WITH VALVES ANDMOTOR

The flow division error between one element and another is <= 3%

Provided that the values of the table and the data indicated below are complied with :Ambient temperature : 10°C÷+60°COil temperature :+30°C÷+60°CMineral base hydraulic oil HLP ,HV ( DIN 51524 )Oil viscosity 20 ÷ 40 cStOil filtering 10 ÷ 25

P1 = Operating pressureP2 = Peak pressure

FLOW DIVIDERS Red series - Group 0

TECHNICAL SPECIFICATIONS

Pag. 4 HT 22 / A / 201 / 0605 / E

Flow dividerFLOW DIVIDERS Red series - Group 0

KV - 0 DFFLOW DIVIDER

EXAMPLE : To obtain the total length (L) of a three-element divider (n=3), the element being TYPE KV-0 DF / 0.76 x 3 L = (n-1) x 23+ 74 + A1 + A2 + A3 = ( 3-1) x 23+ 74+ 34+ 34+ 34 = 222 mm.

L = ( n-1) x 23 + 74 + A1+ A2 + A3 +…..+ Ann = Number of elements making up Divider

HT 22 / A / 201 / 0605 / E Pag.5


KV - 0 DFVFLOW DIVIDER WITH

PHASE CORRECTION VALVES

EXAMPLE : To obtain the total length ( L) of a three-element divider (n=3), the element being TYPE KV-0 DFV / 0.76 x 3 L = (n-1) x 23+ 92 + A1 + A2 + A3 = (3-1) x 23+ 92+ 34+ 34+ 34 = 240 mm.

L = ( n-1) x 23 + 74 + A1+ A2 + A3 +…..+Ann = Number of elements making up Divider

Pag. 6 HT 22 / A / 201 / 0605 / E


KV- 0 DF + 0MFLOW DIVIDER WITH MOTOR

KV- 0 DFV + 0MFLOW DIVIDER WITH

PHASE CORRECTION VALVES AND MOTOR

L = (n-1) x 23 + 74 + B + A1 + A2 + A3 + ..+ Ann = Quantity of elements of the divider including the motor

EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N = 3), Type KV-0 DF / 0.76 x 2 + 0M / 1.52L = ( n -1) x 23 +74 + B + A1 + A2 + A3 = (3 -1) x 23 +74+ 40+ 34+ 34 = 228 mm.

L = ( n -1) x 23 + 83 + B + A1+ A2 +A3 + ..+Ann = Quantity of elements of the divider including the motor

EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N=3), Type KV-0 DFV / 0.76 x 2 + 0M / 1.52L = (n-1) x 23 + 83+B+A1+A2+A3 = (3-1) x 23 + 83+ 40+ 34+ 34 = 237 mm.

HT 22 / A / 201 / 0605 / E Pag.7

Flow divider

KV-1 DFFLOW DIVIDER

KV-1 DFVFLOW DIVIDER WITH PHASECORRECTION VALVES

KV-1 DF+0MFLOW DIVIDER WITH MOTOR

KV-1 DFV+0MFLOW DIVIDER WITH VALVES ANDMOTOR




FLOW DIVIDERS Green series - Group 1


Pag. 8 HT 22 / A / 201 / 0605 / E

Flow dividerFLOW DIVIDERS Green series - Group 1


EXAMPLE : To obtain the total length (L) of a three-element divider (n=3), the element being TYPE KV-1 DF / 4,3 x 3 L = (n-1) x 33+ 77 + A1 + A2 + A3 = ( 3-1) x 33+ 77+ 54+ 54+ 54 = 305 mm.


HT 22 / A / 201 / 0605 / E Pag.9


KV - 1 DF VFLOW DIVIDER WITH


EXAMPLE : To obtain the total length (L) of a three-element divider (n=3), the element being TYPE KV-1 DF / 4,3 x 3 L = (n-1) x 33+ 97 + A1 + A2 + A3 = ( 3-1) x 33+ 97+ 54+ 54+ 54 = 325 mm.


Pag. 10 HT 22 / A / 201 / 0605 / E


KV- 1 DF + 1MFLOW DIVIDER WITH MOTOR

KV- 1 DFV + 1MFLOW DIVIDER WITH



EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N = 3), Type KV-1 DF / 0.76 x 2 + 1M / 9,8L = ( n -1 ) x 33 +77 + B + A1 + A2 + A3 = (3 -1) x 33 +77+ 76+ 54+ 54 = 327 mm.


EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N=3), Type KV-1 DFV / 0.76 x 2 + 1M / 9,8L = ( n-1 ) x 33 + 87+B+A1+A2+A3 = ( 3 -1) x 33 + 87+ 76+ 54 + 54 = 337 mm.

HT 22 / A / 201 / 0605 / E Pag.11

Flow divider


KV - 2 DFVFLOW DIVIDER WITH PHASE CORRECTIONVALVES

KV - 2 DF + 2MFLOW DIVIDER WITH MOTOR

KV -2 DFV + 2MFLOW DIVIDER WITH VALVES ANDMOTOR




FLOW DIVIDERS Yellow series - Group 2


Pag. 12 HT 22 / A / 201 / 0605 / E

Flow dividerFLOW DIVIDERS Yellow series - Group 2



EXAMPLE : To obtain the total length (L) of a three-element divider (n=3), the element being TYPE KV - 2DF / 22 x 3 L = ( n-1) x 37 + 80 + A1 + A2 + A3 = ( 3-1) x 37+ 80 + 78 + 78 + 78 = 388 mm.

HT 22 / A / 201 / 0605 / E Pag.13


KV - 2 DF VFLOW DIVIDER WITH



EXAMPLE : To obtain the total length (L) of a three-element divider (n=3), the element being TYPE KV - 2DFV / 9 x 3 L = ( n-1) x 37 + 92 + A1 + A2 + A3 = ( 3-1) x 37+ 92 + 54 + 54 + 54 = 328 mm.

Pag. 14 HT 22 / A / 201 / 0605 / E


KV - 2 DF + 2MFLOW DIVIDER WITH MOTOR

KV - 2 DFV + 2MFLOW DIVIDER WITH



EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N = 3), Type KV-2 DF / 6 x 2 + 2M / 11L = ( n -1 ) x 37 +80 + B + A1 + A2 + A3 = (3 -1) x 37 +80 + 58 + 50+ 50 = 312 mm.


EXAMPLE:To obtain the total length ( L) of a two element divider with motor (N=3), Type KV-2 DFV / 6 x 2 + 2M / 11L = ( n-1 ) x 37+ 86+B+A1+A2+A3 = ( 3 -1) x 37 + 86 + 58+ 50 + 50 = 318 mm.

HT 22 / A / 201 / 0605 / E Pag.15

Flow divider

General structure of codes

A COMPOSITION CODE identifies a divider made up of elements with identicaldisplacements and valves ( if requested ).To order a divider with motor you must also indicate the displacement.

The type of divider may be one of the following:

Pag. 16 HT 22 / A / 201 / 0605 / E

Flow divider

The displacement of the divider elements may be one of the following:

The codes of the valves, if requested, are as follows:

HT 22 / A / 201 / 0605 / E Pag.17

Flow divider

You may choose one of the displacement below for the motor:

Pag. 18 HT 22 / A / 201 / 0605 / E

Flow divider

HT 22 / A / 201 / 0605 / E Pag.19

Flow divider

Pag. 20 HT 22 / A / 201 / 0605 / E

Flow divider

HT 22 / A / 201 / 0605 / E Pag.21

Flow divider

We shal l examine the path of f lu id inside the f low div ider by means ofdiagrams.The fol lowing symbols are used:

P = port for incoming f low from the pumpT = port for f low conveyed to the tankGi = port for del ivery of f lu id to usersA e B = del ivery and discharge of motor element.

Hydraulic diagrams of flow dividers

Diagrams

Diagram of divider comprising three elements

Diagrams of three-element divider with valve

In th is example we consider a div idermade up of three elements, but the sameconsiderat ions also apply for a div iderwith Ne elements.The incoming f low from the P suppl ies thethree sect ions, whose gears, f i t ted ontothe same shaft , start turning at equalspeeds.From the elements, three branches carryf low to the users. The f low rates aresolely determined by the displacements ofthe respect ive elements.Depending on the external c i rcui t , thediv ider may work in ei ther one or bothdirect ions.

This case di f fers f rom the previous oneonly in that there are three phasecorrect ion valves, which are connected tothe Gi branches and discharge f low intomanifold T.This example shows the configurationwith external drainage of the valves,given that this is the most frequent case.For the sake of simplicity, the diagramdoes not show the service conduits forthe pressure gauges.

Pag. 22 HT 22 / A / 201 / 0605 / E

Flow divider

The motor element is mechanically linked tothe other elements by means of the shaft.However, it is wholly independent from ahydraulic standpoint.In fact the delivery and discharge outlets A and B are separate from intake P andthe Gi branches serving the users.

Diagram of divider with valves and motor

Diagrams of two-element divider with motor

In this diagram of a two-element divider withmotor, two phase correction valves havebeen added on the branches delivering flowto the users.For the sake of simplicity, the diagramdoes not show the service plug for thepressure gauges.

HT 22 / A / 201 / 0605 / E Pag.23

Flow divider

Diagrams of systems with flow dividers

Diagram with four-element divider with valves

For the purpose of illustration, below we shall describe some examples of systemsusing flow dividers.

The divider, comprising 4 sections, feeds 4double-acting cylinders from the extensionside, whereas from the return side, flow isdelivered directly from the pump: (one-waydivider).To keep the cylinders synchronized in phase,the divider is equipped with 4 phasecorrection valves (one for each cylinder fromthe extension side and therefore withalignement of the cylinders only from thethrusting side).The flow discharged from the valves isdirectly conveyed to the fluid tank.The divider is also provided with auxiliary 1/8"outlets, here shown plugged up; these outletsare for applying the pressure gauges thatare necessary for setting the valves.To prevent the cylinders fromspontaneously reentering as a resultof loading, 4 piloted check valves areprovided on the branches feeding thethrust chambers of the cylinders.These valves allow the flow of fluidonly when the reentry command isactivated, which puts the reentryconduit under pressure.This pressure opens the limit valves andallows fluid to circulate.

Pag. 24 HT 22 / A / 201 / 0605 / E

Flow divider

Diagram with three-elements divider with three valves and motor

The divider has 3 sections that supply3 single-acting cylinders with 3 phasecorrection valves and a section thatacts as a motor.The divider has three 1/8" outlets (plugged) forpressure gauges.In the cylinders reentry phase, the motorreceives flow from the pump and discharges itinto the tank through a filter. To prevent the motor from gaining too muchspeed, there is an adjustable flow-limitingvalve that drains part of the flow comingfrom the pump.As it turns, the motor draws with it the gearsof the divider, thereby allowing the cylinders toreenter and to discharge the fluid through thedivider into the tank after its filtering.In the cylinders extension phase, themotor is instead drawn by the shaft of thedivider and suck oil from the tank, bypassingthe filter, to prevent cavitation.

HT 22 / A / 201 / 0605 / E Pag.25

Flow divider

Diagram with four- element divider

The divider shown here in the diagram iscapable of supplying four circuits in a whollyindependent manner, three being connectedto three hydraulic cylinders and one to ahydraulic motor.The layout of the connections provides forthe divider to work with flow moving throughit in both directions.A double pressure-relief valve protects themotor against overloads.All the cylinders are provided withunidirectional piloted check valves(flow is blocked in one direction andfree in the other), which maintain theload until their reentry is actuated.The phase correction of the cylindersis not provided here, being presumedunnecessary in the presence ofindependent circuits.It should be noted that the fluid returning tothe tank is completely filtered.In fact, to prolong the life of the flow divider,it is recommended not to use filters with abypass designed to prevent dirt fromclogging the filter.If you wish to monitor the degree of cloggingin the cartridge, equip the filter with asuitable pressure gauge.

Pag. 26 HT 22 / A / 201 / 0605 / E

Flow divider

Diagram of pressure amplifying circuitThe circuit shown is a simplified exampleof the use of a two-element flow divideras a pressure amplifier in a hydraulicpress where the approach to the piece tobe pressed must be fast even at lowpressures, whereas the pressing must beat high pressure even if slow.In the example, the flow for the approachis the sum of the flow rates of the twoelements comprising the divider.Since the two pressure-relief valves on thebranches of the hydraulic cylinder are setat two different pressures (one at lowpressure and the other at high pressure),when the rod begins to press the piece,the pressure rises and causes the valveset at a low pressure to open and theflow in the corresponding branch goes tobe discharged.As the rotation of the divider gears andthe power of the pump do not change, allthe power converges in the activeelement of the divider, which mayconsequently supply a pressureexceeding even that of the pump itself.

Diagram of 4-element divider with valves + motor

The difference between this circuit and the onewith three elements + motor lies in the numberof elements and the type of phase correctionvalves, which are electrically rather thanhydraulically controlled.The following operating modes are possible:- all cylinders in parallel;- all cylinders independent;- groups of cylinders independent from others;- disabling of one or more cylinders, by keepingthe corresponding solenoid valves de-energized.All the hydraulic cylinders (single-acting)are provided with solenoid valves that disabletheir movement if the coils are not energized.




HT 22 / A / 201 / 0605 / E

Flow Divider




As HANSA-TMP has a very extensive range of products and some products havea variety of applications, the information supplied may often only apply to specificsituations. If the catalogue does not supply all the information required, pleasecontact HANSA-TMP. In order to provide a comprehensive reply to queries we may require specific data regarding the proposed application.

Whilst every reasonable endeavour has been made to ensure accuracy, thispublication cannot be considered to represent part of any contract, whetherexpressed or implied.HANSA-TMP reserves the right to amend specifications at their discretion.

Poichè HANSA-TMP offre una gamma di prodotti molto estesa ed alcuni di questivengono impiegati per più tipi di applicazioni, le informazioni riportate possonoriferirsi solo a determinate situazioni. Se nel catalogo non sono riportati tutti i datinecessari, si prega di contattare HANSA-TMP.Al fine di poter fornire una risposta esauriente potrà rendersi necessaria larichiesta di dati specifici riguardanti l'applicazione in questione.

Questo catalogo, pur essendo stato approntato con particolare riguardo allaprecisione dei dati riportati, non consiste parte di alcun contratto espresso oimplicito.HANSA-TMP si riserva il diritto di apportare qualsiasi modifica ai dati riportati.

Flow Divider - Hansa Divider.pdf · FLOW DIVIDER WITH MOTOR KV- 0 DFV + 0M FLOW DIVIDER WITH PHASE...

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