4/2 and 4/3 proportional directional valves, directly controlled, with electrical position feedback Models 4WRE and 4WREE

Transcription

1 RA 9 6/6.98 RA 9 6/6.98 Replces:.97 / nd / proptionl directionl vlves, directly controlled, with electricl position feedck Models WRE nd WREE H/A/D 88/97 Nominl sizes 6 nd Series X Mximum operting pressure 6 PSI ( r) Mximum flow 6. GPM ( L/min) Model WRE 6...-X/GK/V with plug-in connects nd ssocited control electronics (seprte der) H/A/D 7/97 Model WREE...-X/GK/..V with integrted control electronics Contents Description Pge Fetures Ordering detils Symols Function, section Technicl dt nd Electricl connections, plug-in connect Integrted vlve electronics f model WREE 6 nd 7 plug-in connect, plug lloction, lock circuit digrm / connection lloction Chrcteristic curves 8 to Unit dimensions nd 6 Externl control electronics f model WRE 7 nd 8 Fetures Directly controlled proptionl vlve f the control of direction nd mgnitude of flow Actution is y proptionl solenoids with centrl thred nd removle coil Electricl position feed-ck F supltes: pting pttern to DIN fm A, ISO, CETOP-RP H, NFPA T..M R, nd ANSI 9.7 D, D Supltes to ctlog sheets RA nd RA (seprte der), see pges nd 6 Spring centered control spool Model WREE, integrted vlve electronics with interfce And F Control electronics f model WRE: electronic mplifier VT-VRPA--X in Eurocrd fmt (seprte der) /8

2 RA 9 6/6.98 Ordering detils WRE X / G / V * Without integrted control electronics = No code With integrted control electronics (stndrd electronics) = E Nominl size 6 = 6 Nominl size = Symols A P T A P A P T T = E E- = E- =V V- = W W- = W- = EA = WA = E = W Model WRE... A P T A = F = V = Model WREE... A P T Further detils in cler text FPM rectngulr rings, suitle f minerl oil (HL, HLP) to DIN F WREE: commnd vlue input ± VDC commnd vlue input to ma Electricl connection f WRE K = with component plug DIN 6-AM without plug-in connect (solenoid, position trnsducer) plug-in connect seprte der see pge Electricl connection f WREE K = with component plug to E DIN 6-AM6- without plug-in connect plug-in connect seprte der see pge 6 G = Power supply voltge VDC X = Series to 9 ( to 9: unchnged instlltion nd connection dimensions) Nominl flows t vlve pressure differentil Dp = PSI ( r) Size 6 8 =. GPM (8 L/min) 6 =. GPM (6 L/min) = 8. GPM ( L/min) Size = 6.6 GPM ( L/min) =. GPM ( L/min) 7 = 9.8 GPM (7 L/min) With symols E-, V- nd W-: P A: q V mx T: q V / P : q V / A T: q V mx With sysmols E- nd W-: P A: q V mx T: closed P : q V / A T: q V mx Note: F spools W, WA nd W there is in the neutrl position connection etween A nd T nd to T with pprox. % of the relevnt nominl cross-section. Model WRE...A... A P T Model WRE... A P T Model WREE...A... A P T Model WREE... A P T Rexroth Hydrulics /8 WRE / WREE

3 Function, section The / nd / proptionl directionl vlves re directly controlled components of suplte mounting design. They re ctuted y proptionl solenoids with centrl thred nd removle coil. The solenoids re controlled y either externl control electronics (model WRE) y the integrted vlve electronics (model WREE). Design: The vlve siclly consists of: Housing () with mounting fce Control spool () with compression springs ( nd ) Solenoids ( nd 6) with centrl thred Position trnsducer (7) Integrted vlve electronics (8) Vi the Pg. the mechnicl zero point djustment (9) is ccessle nd the electricl zero point is ccessle vi the Pg7() (Model WREE) RA 9 6/6.98 Functionl description: With de-energized solenoids ( nd 6), the control spool () is held in the centrl position y the compression springs ( nd ) Direct ctution of the control spool () y energizing one of the proptionl solenoids, e.g. control of solenoid "" (6) Movement of the control spool () to the left in proption to the electricl input signl Connection from P to A nd to T vi ifice like cross-sections with progressive flow chrcteristics De-energizing of solenoids (6) The control spool () is returned to the centrl position vi the compression spring () In the de-energized condition the spool () is held in mechnicl centrl position y the solenoid return springs. The spring center position with the V-spool my not crespond to the electricl null. A "" "" 9 Model WRE...-X/G A T 7 8 (P) 6 8 "" "" A T (P) 6 Model WREE...-X/G Vlve with switching positions: (models WRE A WRE ) The function of this vlve version is siclly the sme s tht of the vlve with switching positions. The switching position vlves re however only fitted with solenoid "" () solenoid"" (6). A plug () is fitted in plce of the nd proptionl solenoid. Guideline f model WRE -X/G : Drining of the tnk line is to e prevented. Tking the instlltion conditions into ccount ck pressure vlve is to e fitted (ck pressure pprox. 9 PSI ( r). WRE / WREE /8 Rexroth Hydrulics

4 RA 9 6/6.98 Technicl dt (f pplictions outside these prmeters, plese consult us!) Generl Size 6 Size Instlltion optionl, preferly hizontl Amient WRE F ( C) to + 8 ( to + 7) temperture rnge WREE F ( C) to + ( to + ) Stge temperture rnge F ( C) to + 76 ( to + 8) Weight WRE ls (kg).8 (.).89 (6.) WREE ls (kg).9 (.). (6.) Hydrulic mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Operting pressure Pts A,, P PSI (r) up to 6 () Pts T PSI (r) up to 6 () Nominl flow q V nom t p = PSI ( r) GPM (L/min). (8) 6.6 (). (6). () 8. () 9.8 (7) Flow, mx. permissile GPM (L/min). (8) 7. (8) Pressure fluid Minerl oil (HL, HLP) to DIN, further fluids on request Degree of contmintion Mximum permissile degree of contmintion of the fluid to NAS 68 clss 9. We, therefe, recommend filter with minimum retention rte of ß x 7, x =. Fluid temperture rnge F ( C) to + 76 ( to + 8), preferly + to + (+ to + ) Viscosity rnge SUS (mm /s) 97 to 76 ( to 8), preferly to 8 ( to 6) Hysteresis %. Reversl err %. Response sensitivity %. Electricl (solenoid) Insultion to DIN exceeds NEMA clss (IP 6) Voltge model Signl model DC nlog Commnd vlue signl Voltge input "A" V ± Current input "F" ma to Mx. current per solenoid A. Solenoid coil Cold vlue t C Ω resistnce Mx. wrm vlue Ω Duty % Coil temeprture F ( C) up to () Electricl (inductive position trnsducer) Electrcil mesuring system Electricl connection inductive Protection to DIN IP 6 plug-in connect -pin + Pg7-GWF Rexroth Hydrulics /8 WRE / WREE

5 Technicl dt (f pplictions outside these prmeters, plese consult us!) RA 9 6/6.98 Electricl (integrted electronics) Supply voltge Nominl voltge VDC WREE Lower limiting vlue V 9 Upper limiting vlue V Amplifier power I mx A.8 consumption Impulse current A Input impednce Voltge input A Ω K higher Current input F Ω Zero displcement %/ K. Electricl (control electronics) WREE integrted into the vlve, see pges 6 nd 7 Note: F detils regrding the environmentl simultion test covering EMV (electro-mgnetic comptility), climte nd mechnicl loding see RA 9 6-U (declrtion regrding environmentl comptiility). Electricl connection, plug-in connect %/ PSI ( r). WRE model VT-VRPA--X Amplifier in Eurocrd fmt (seprte der) see pges 7 nd 8 ctlog sheet RA F model WRE (without integrted electronics) Connections on the component plug PE PE Connections on the plug-in connect PE To mplifier PE To mplifier Plug-in connect to DIN 6-AF Solenoid, grey, Pg (Z) prt no. RR 7 68 Solenoid, lck, Pg (Z) prt no. RR 7 68 Solenoid, red-rown, / NPT (Z) prt no. RR 8 Solenoid, lck, / NPT (Z) prt no. RR 9 Inductive position trnsducer Coil connections.8 (7.).8 (). (6).9 ().8 (7.).8 () Ø.886 (.) Connections on the plug connect Signl ground Supply ground Signl Supply To mplifier Plug-in connect -pin Pg7-GWF prt no. RR 6 Connection cle: Recommendtion: up to 6 ft ( m) cle length strnded AWG (LiYCY x. mm ) with shield. Only connect shield to erth ground PE on the supply side. Outside dimeter.6 to.9 in (. to 7. mm).6 (6).9 ().7 (7.8).6 (7) Ø.9 () Pg7 WRE / WREE /8 Rexroth Hydrulics

6 RA 9 6/6.98 Integrted vlve electronics f model WREE Plug-in connect Plug-in connect to E DIN 6-F6-/Pg Seprte der under prt no. RR 67 (plstic) F pin lloction see lock circuit digrm on pge 7. (.) (sel).8 (9) F E D A C Ø.6 Ø. (Ø 6. Ø.) Component plug lloction Contct Signl Supply voltge A VDC = (9. V to V); I mx =A V Ref. potentil ctul vlue C V reference contct F Differentil mplifier input D ± V, R e >kω;... ma, R e > Ω; commnd vlue E V reference Mes. output (ctul vlue) F ± V (limiting lod ma);... ma, mx. lod impednce Ω; ctul vlue PE connected with het sink nd vlve housing Actul vlue: Positive ctul vlue ( to ma) t F nd reference potentil t C results in flow from P to A. Commnd vlue: Positive commnd vlue ( to ma) t D nd reference potentil t E results in flow from P to A nd to T. Negtive commnd vlue ( to ma) t D nd reference potentil t E results in flow from P to nd A to T. F vlue with solenoid on side (e.g. spool vrint EA nd WA) positive commnd vlue ( ma) t D nd reference potentil t E results in flow from P to nd A to T. Connection cle: Recommendtion: up to 8 ft ( m) cle length strnded 8 AWG (LiYCY 7 x.7 mm ) up to 6 ft ( m) cle length strnded 6 AWG (LiYCY 7 x. mm ) outside dimeter.6 to. inches (6. to. mm) Only connect shield to erth ground PE on the supply side. Rexroth Hydrulics 6/8 WRE / WREE

7 Integrted vlve electronics f model WREE RA 9 6/6.98 lock circuit digrm/connection lloction f the integrted vlve electronics Interfce Integrted vlve electronics Vlve Commnd vlue Ref. potentil Actul vlue D E F Differentil mplifier V V Actul vlue Rmp ) genert Controller V I Ref. potentil C V V V I Under voltge detection Interlock Supply V A Power supply + V i voltge U GND U V V i PE Protective ground ) Sensitivity Demodult = Oscillt = Zero point ) Position trnsducer Note: Electricl signls processed y vlve electronics (e.g. ctul vlue) must not e used f switching off sfetyrelevnt mchine functions! (See lso Europen Stndrd "Sfety requirements of fluid power systems nd components Hydrulics, drft per EN 98!) ) Connection PE is connected to the het sink nd the vlve housing ) Rmp is externlly djustle from to s (T up T down ) ) Zero point is externlly djustle F A Actul Vlve + V V E D C Reference (Actul Vlue) Zero ± V/ ma (Diff.) Reference (Diff.) ) ) WRE / WREE 7/8 Rexroth Hydrulics

8 RA 9 6/6.98 Chrcteristic curves: mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Sizes 6 nd Pressure-signl-chrcteristic curves (V-spool), p S = PSI ( r) Size 6 Size p L p in % S p L p in % S U E U EN in % U E U EN in % Lekge flow (f spool in the center position) Model WREE 6 V Model WREE V7 (). (). Lekge flow in GPM (L/min) ().... Lekge flow in GPM (L/min) () () () () () () ()() Operting pressure in PSI (r) 6 () () () () () ()() Operting pressure in PSI (r) Rexroth Hydrulics 8/8 WRE / WREE

9 RA 9 6/6.98 Chrcteristic curves: mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Size 6. GPM (8 L/min) nominl flow t PSI ( r) vlve pressure differentil () 8 6 () () P A/ T P /A T p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt Commnd vlue in %. GPM (6 L/min) nominl flow t PSI ( r) vlve pressure differentil (6) () () () () () P A/ T P /A T p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt Commnd vlue in % 8. GPM ( L/min) nominl flow t PSI ( r) vlve pressure differentil () () (8) (6) () () P A/ T P /A T p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt Commnd vlue in % WRE / WREE 9/8 Rexroth Hydrulics

10 RA 9 6/6.98 Chrcteristic curves: mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Size 6.6 GPM ( L/min) nominl flow t PSI ( r) vlve pressure differentil (8) (7) (6) () () () () () P A/ T P /A T p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt () () () (7) () () Commnd vlue in %. GPM ( L/min) nominl flow t PSI ( r) vlve pressure differentil P A/ T P /A T p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt Commnd vlue in % 9.8 GPM (7 L/min) nominl flow t PSI ( r) vlve pressure differentil () (7) () () () (7) () () () (7) () () P A/ T P /A T Commnd vlue in % p = vlve pressure differentil (inlet pressure p P minus lod pressure p L minus return pressure p T ) p = PSI ( r) constnt p = 9 PSI ( r) constnt p = PSI ( r) constnt p = 7 PSI ( r) constnt p = PSI ( r) constnt Note: Power limittions on pge re to tken into ccount! Rexroth Hydrulics /8 WRE / WREE

11 RA 9 6/6.98 Trnsient function with stepped fm of electricl input signl Size 6 mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Stroke in % Signl chnge in % 7 p S = PSI ( r) Time in ms Frequency response chrcteristic curves Size 6 (mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Amplitude reltionship in d Phse ngle in Frequency in Hz Signl ±% Signl ± % Signl ± % p s = PSI ( r) WRE / WREE /8 Rexroth Hydrulics

12 RA 9 6/6.98 Chrcteristic curves: mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Size 6 Nominl flow. GPM (8 L/min) () () () 8 6 () () 7 6 P A / T P / A T () () () () () ()() Vlve pressure differentil in PSI (r) Nominl flow. GPM (6 L/min) () (9) (7) () () P A / T P / A T () () () () () () ()() Vlve pressure differentil in PSI (r) Nominl flow 8. GPM ( L/min) () () (8) (6) () 7 6 perfmnce limit P A / T P / A T () () () () () () ()() Vlve pressure differentil in PSI (r) Commnd vlue = % Commnd vlue = % Commnd vlue = 6 % Commnd vlue = 7 % Commnd vlue = 8 % 6 Commnd vlue = 9 % 7 Commnd vlue = % Rexroth Hydrulics /8 WRE / WREE

13 RA 9 6/6.98 Trnsient function with stepped fm of electricl input signl Size mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Stroke in % Signl chnge in % 7 p S = PSI ( r) Time in ms Frequency response chrcteristic curves Size mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Amplitude reltionship in d Phse ngle in Frequency in Hz Signl ±% Signl ± % Signl ± % p s = PSI ( r) WRE / WREE /8 Rexroth Hydrulics

14 RA 9 6/6.98 Perfmnce limits: mesured t ν = 8 SUS (6 mm /s) nd t = F ( C) Size Nominl flow 6.6 GPM ( L/min) () () (8) (6) () P A / T P / A T () () () () () () Vlve pressure differentil in PSI (r) Nominl flow. GPM ( L/min) (6) () () () (8) (6) () () P A / T P / A T () () () () () Vlve pressure differentil in PSI (r) Nominl flow 9.8 GPM (7 L/min) () () (6) () (8) () 6 P A / T P / A T () () () () () Vlve pressure differentil in PSI (r) Commnd vlue = % Rexroth Hydrulics /8 WRE / WREE

15 RA 9 6/6.98 Unit dimensions: dimensions in inches (millimeters) Size 6 Model WRE 9.96 ().8 (7).66 (8.).9 () 6 A.7 ().9 (7) 7.99 (). (.).7 (69). (8.).68 (68) Model WREE.9 ().8 (7).6 (.) 7. (6) (7). () A T P.8 (.).7 (.). (8) A T P.7 ().96 ().8 (7).9 (7) Supltes nd vlve mounting olts must e dered seprtely, see RA Su-pltes: G/ (/ NPT) G/ (SAE ; 7/6-) G/ (/8 NPT) G/ (SAE ; 7/6-) G/ (/ NPT) G/ (SAE ; 7/6-) Vlve mounting olts: ) - UNC x (M x ), SAE grde 8 etter; DIN 9-.9; Tque M A = 6.6 l-ft (8.9 Nm) Vlve housing Proptionl solenoid "" with inductive position trnsducer Proptionl solenoid "" Plug-in connect "A", col grey; seprte der, see pges nd Plug-in connect "", col lck; seprte der, see pges nd 6 Plug-in connect f position trnsducer; seprte der, see pges nd. (.).7 (69) 7.99 (). (6). (8.).68 (68)./. in./ mm (R mx ) Required surfce finish of mting piece 7 Plug f vlves with one solenoid (-switching positions), versions EA, WA, E W 8 R-ring 9.8 mm x. mm x.78 mm (Pts A,, P, T) 9 Spce required to remove plug-in connect Integrted electronics Plug-in connect to E DIN 6-F6-/Pg (seprte der, see pges nd 6) Nme plte Mchined vlve mounting surfce, nd loction of the connections to DIN fm A, ISO,CETOP-RPH, NFPA/ANSI D WRE / WREE /8 Rexroth Hydrulics

16 RA 9 6/6.98 Unit dimensions: dimensions in inches (millimeters) Size Model WRE 9.9 () A.7 (.).8 ().8 (.8).76 (7).78 (9).6 (69.).6 (9).7 (6).7 (). (7.) Model WREE.787 ().7 (9).6 (). ().8 (7).8 (6) A TA P T A P TA.6 () T.78 (9) Ø. (6) (9).8 (7.).8 ().76 (7) Supltes nd vlve mounting olts must e dered seprtely, see RA. Supltes: G66/ (/8 NPT) G66/ (SAE 6; 9/6-8) G67/ (/ NPT) G67/ (SAE 8; /-6) G/ (/ NPT) G/ (SAE ; -/6-) Vlve mounting olts: ) /- UNC x -/ (M6 x ); socket hed cp screws (SAE grde 8 etter); Tque M A =. l-ft (. Nm) Vlve housing Proptionl solenoid "" with inductive position trnsducer Proptionl solenoid "" Plug-in connect "A", col grey; seprte der, see pges nd Plug-in connect "", col lck; seprte der, see pges nd 6 Plug-in connect f position trnsducer; seprte der, see pges nd.78 (9).6 (69.).6 (9). (6).7 (). (7.)./. in./ mm (R mx ) Required surfce finish of mting piece 7 Plug f vlves with one solenoid (-switching positions), versions EA, WA, E W 8 R-ring. mm x.6 mm x. mm (Pts A,, P, TA, T) 9 Spce required to remove plug-in connect Integrted electronics Plug-in connect to E DIN 6-F6-/Pg; seprte eder, see pges nd 6 Nme plte Mchined vlve mounting surfce, nd loction of the connections to DIN fm A, ISO, CETOP-RPH, nd NFPA/ANSI D Rexroth Hydrulics 6/8 WRE / WREE

17 Notes RA 9 6/6.98 WRE / WREE 7/8 Rexroth Hydrulics

18 RA 9 6/6.98 Notes Mnnesmnn Rexroth Cption Rexroth Hydrulics Div., Industril, City Line Rod, ethlehem, PA 87- Tel. (6) 69-8 Fx: (6) Rexroth Hydrulics Div., Moile, 7 Old Mnsfield Rod, Wooster, OH 69-9 Tel. () 6- Fx: () 6- All rights reserved Suject to revision Printed in U.S.A. 8/8 WRE / WREE