Directional control valves, pilot-operated, with electrical position feedback and integrated electronics (OBE) Type 4WRDE. Contents.

Transcription

1 Directional control valves, pilot-operated, with electrical position feedback and integrated electronics (OE) ype 4WRDE RE 997 Edition: 6-5 Replaces: 99 (NG and NG6) Sizes and 6 Component series 6X Maximum operating pressure 5 bar Rated flow 5 l/min H89 Features 4/-way version -stage recise: ilot control with -stage servo valve type 4WSEM 6-X/ articularly suitable for position, velocity, pressure and force control of high-precision applications High dynamics and response sensitivity Reliable roven and robust design Contents Features Ordering code Symbols ; 4 Function, section 5 echnical data 6, 7 Electrical connections, assignment 8 lock diagram/controller function block 9 Characteristic curves 6 Dimensions 7 9 ccessories 9, Further information RE 997, edition: 6-5, osch Rexroth G

2 / 4WRDE Directional control valves Ordering code WRD E 6X / / 4 * 4 main ports 4 Directional control valve WRD With integrated electronics (OE) E 4 Size Size Symbols e.g. E, E, W etc.; possible version see page Control spool position in de-energized state 6 Not defined no code % / % / N Rated flow at bar valve pressure differential (5 bar per control edge) 7 Size 5 l/min (only symbol E, W6-, W8- and V with version "L") 5 5 l/min 5 9 l/min Size 6 5 l/min (only symbol V with version "L") 5 l/min Flow characteristic 8 Linear L Linear with fine control range 9 Component series 6 69 (6 69: unchanged installation and connection dimensions) 6X Seal material NR seals M FKM seals V Observe compatibility of seals with hydraulic fluid used! (other seals on request) ilot oil flow External pilot oil supply, external pilot oil return XY Internal pilot oil supply, external pilot oil return Y Internal pilot oil supply, internal pilot oil return External pilot oil supply, internal pilot oil return X Without sandwich plate shut-off valve no code With sandwich plate shut-off valve, 4 V WG Supply voltage 4 V 4 Electrical interface 4 Command value ± VDC, actual value ± VDC (connector 6+E) Command value 4 m, actual value 4 m (connector 6+E) F Command value ± m, actual value 4... ma (connector 6+E), only in connection with version "" and "N" (de-energized control spool position) C For further information, see the plain text osch Rexroth G, RE 997, edition: 6-5

3 Directional control valves 4WRDE / Symbols a b a b = E = E- = W6 = W8 = V = V- With symbol E-, W8 and V-: : q V max : q V / : q V / : q V max Notices: Representation according to DIN ISO 9-. Hydraulic interim positions are shown by dashes. With symbols W6 and W8 there is a connection from to and to with approx. % of the relevant nominal crosssection in zero position. RE 997, edition: 6-5, osch Rexroth G

4 4/ 4WRDE Directional control valves Symbols Version simplified detailed a b 4 G X Y "XY" a a b b Y X a b a b 4 G X Y "Y" a a b b Y "" a a b b "X" a a b X b ilot control valve Main valve Directional sandwich plate valve 4 Integrated electronics (OE) osch Rexroth G, RE 997, edition: 6-5

5 Directional control valves 4WRDE 5/ Function, section Set-up -stage directional control valve of type 4WRDE generally consisting of: Servo pilot control valve, -stage, type 4WSEM6-X () Main stage (), consisting of housing and main stage control spool Integrated electronics () with inductive position transducer of the main stage Function In the integrated electronics (OE), the specified command value is compared with the position actual value of the main stage control spool. In case of a difference (control deviation), the first stage of the pilot control valve is controlled (dry torque motor and nozzle flapper plate system). his way, a deflection of the flapper plate of the nozzle flapper plate system is realized. he distance of the flapper plate to one of the two control nozzles flownthrough by pilot oil is reduced and increased to the other one. hrough the connecting bore, the resulting flow difference leads to deflection of the control spool in the pilot control valve (nd stage) similarly to the control signal. he flow released by the pilot control valve leads to deflection of the control spool of the main stage (rd stage) until its position actual value corresponds to the command value. he stroke of the control spool is controlled proportionally to the command value. Valve particularities ilot control valve and integrated electronics (OE) have to be readjusted after replacement. ll adjustments may only be carried out by trained specialists. he valves are factory-set with a dither default setting with the constant frequency of 4 Hz. Changes in the zero point and/or the dither amplitude may result in damage to the system and may only be implemented by instructed specialists. he pilot control valve may only be maintained by Rexroth employees. n exception is the replacement of the filter and the sealing according to accessories list. It has to be ensured that during the assembly, the sealing is properly seated and the plug screw is tightened. he tightening torque for the plug screw is Nm. RE 997, edition: 6-5, osch Rexroth G

6 6/ 4WRDE Directional control valves echnical data (For applications outside these values, please consult us!) general Size NG 6 Weight kg 7.. Installation position ny (preferably horizontal) mbient temperature range C (NR seals) (FKM seals) Maximum storage time Years (if the storage conditions are observed; refer to the operating instructions 76-) Vibration resistance Sine test according to DIN EN Hz / maximum of g / cycles / axes Noise test according to DIN EN Hz / g RMS / g peak / min. / axes ransport shock according to DIN EN g / ms / axes Maximum relative humidity (no condensation) % 95 hydraulic Maximum operating pressure Maximum return flow pressure ilot oil supply external ) ort,, bar 5 ort X bar 5 ilot oil supply internal ort,, bar 5 ilot oil return, external ort bar 5 ilot oil return, internal orts, Y bar ressure peaks < static < admissible Rated flow ( p = 5 bar per control edge) ) l/min Maximum flow (recommended) l/min 7 46 Maximum pilot oil flow at stepped input signal ( %, pilot pressure 5 bar) l/min 6..5 Zero flow at pilot control valve (pilot pressure 7 bar) l/min.4 Hydraulic fluid See table page 7 Hydraulic fluid temperature range (at the valve working ports) C... +8; preferably Viscosity range Maximum mm /s 5 8 Recommended mm /s 45 Maximum admissible degree of contamination of the hydraulic fluid; Cleanliness class according to ISO 446 (c) ilot control valve: Class 8/6/ ) Main stage: Class /8/5 ) 5 ) For perfect system behavior, an external pilot oil supply is recommended for pressures above bar. ) he cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters see osch Rexroth G, RE 997, edition: 6-5

7 Directional control valves 4WRDE 7/ echnical data (For applications outside these values, please consult us!) Hydraulic fluid Classification Suitable Standards Data sheet sealing materials Mineral oils HL, HL NR, FKM DIN Flame-resistant Containing water HFC (Fuchs Hydrotherm 46M, NR etrofer ltra Safe 6) ISO 9 9 Important notices on hydraulic fluids: Flame-resistant containing water: For more information and data on the use of other hydraulic Maximum operating pressure bar, otherwise increased fluids, please refer to the data sheets above or contact us. cavitation erosion here may be limitations regarding the technical valve data Life cycle as compared to operation with mineral oil HL, HL (temperature, pressure range, life cycle, maintenance intervals, % etc.). Maximum hydraulic fluid temperature 6 C he ignition temperature of the hydraulic fluid used must be 4 K higher than the maximum solenoid surface temperature. static / dynamic Hysteresis % <. Response sensitivity % <. Range of inversion % <. Manufacturing tolerance q Vmax % Zero shift upon change of Hydraulic fluid temperature %/K <. mbient temperature %/K <. Operating pressure %/ bar <.5 Return flow pressure % of p %/ bar <. Zero compensation ) Ex plant ±% electrical, integrated electronics (OE) rotection class according to EN 659 I 65 with mating connector mounted and locked Supply voltage Nominal voltage VDC 4 (full bridge rectification with smoothing capacitor µf, I max = m) Lower limit value VDC 8 pper limit value VDC 6 Maximum current consumption m < Functional earth and screening See page 8 (CE-compliant installation) djustment Calibrated in the factory, see valve characteristic curves page... 6 ) Related to the pressure-signal characteristic curve (symbol V) RE 997, edition: 6-5, osch Rexroth G

8 8/ 4WRDE Directional control valves Electrical connections, assignment Contact Interface assignment "" (6 + E) "F" (6 + E) "C6-97" (6 + E) 4 VDC supply voltage C n.c. n.c. (not to be connected) Enable input 4 VDC (high 8.5 V; low 6.5 V) ) D Command value ± V ) (Re > kω) GND Command value 4 m ) (Re = Ω) Command value ± m ) (Re = Ω) E Reference potential command value Reference potential command value Reference potential command value F E ctual value ± V (Ri kω) ctual value 4 m (load max. 5 Ω) Functional earth (directly connected to the valve housing) ctual value 4 m (load max. 5 Ω) ) t active hydraulic pressure and "low" enable signal, the control spool of the main stage is in a regulated central position (preferred position adjustable by ±%). If a directional sandwich plate valve (version "WG") is used between pilot control valve and main stage, the control chambers are unloaded from the pilot control valve to the main stage control spool. With symbols E, E., W6- and W8-, the centering springs set the main stage control spool in central position, symbols V- and V are switched to preferred direction and in a tolerance range of % to % of the control spool stroke. s a consequence, the cylinder axis leaves its position at minimum velocity. ) Differential command value input: ositive command value at D compared to E results in flow from and at the main stage. ) Differential command value input: Command value of m at D compared to E results in flow from and at the main stage. F E E D C osch Rexroth G, RE 997, edition: 6-5

9 D E F C E +5V -5V +V -V M R6 mplitude Dither = ~ D R6 Zero point R8 Sensitivity I Oscillator ~ = Demodulator ~ = SL- SL- SL- SL-4 SL4- SL4- SL4-4 SL4- Servo valve C D Directional control valves 4WRDE 9/ lock diagram/controller function block: Version "" Command value ± V Command value reference ctual value ± V n.c. 4 V (8 6 V) Supply voltage V rotective earthing conductor Switching power supply unit Controller Current controller Output stage brown red black black red brown blue black osition transducer RE 997, edition: 6-5, osch Rexroth G

10 D E F C E I I +5V -5V +V -V M R6 mplitude Dither = ~ D R6 Zero point R8 Sensitivity I Oscillator ~ = Demodulator ~ = SL- SL- SL- SL-4 SL4- SL4- SL4-4 SL4- Servo valve C D / 4WRDE Directional control valves lock diagram/controller function block: Version "F" Command value 4 m Command value reference ctual value 4 m n.c. (not to be connected) 4 V (8 6 V) Supply voltage V rotective earthing conductor Switching power supply unit Controller Current controller Output stage brown red black black red brown blue black osition transducer osch Rexroth G, RE 997, edition: 6-5

11 D E F C E I I +5V -5V +V -V M R6 internal command value R6 mplitude Dither = ~ D R6 Controller offset R6 Zero point R8 Sensitivity I Oscillator ~ = Demodulator ~ = SL- SL- SL- SL-4 SL4- SL4- SL4-4 SL4- Servo valve C D Directional control valves 4WRDE / lock diagram/controller function block: Version "C6-97" Command value ± m Command value reference ctual value 4 m Enable input >+8.5 <+6 V 4 V (8 6 V) Supply voltage V rotective earthing conductor Switching power supply unit Controller Current controller Output stage brown red black black red brown blue black osition transducer RE 997, edition: 6-5, osch Rexroth G

12 / 4WRDE Directional control valves Characteristic curves (measured with HL46, v = mm /s and ϑ Oil = 4 ±5 C) ressure-signal characteristic curve (symbol V; measured with p s = bar) 6 Zero flow of the main stage (symbol V), without pilot control valve pl in % ps Zero flow in l/min e EN - in % Operating pressure in bar Size Size 6 Flow command value function (at e.g. / and bar valve pressure differential or or and 5 bar per control edge) Version "L" (symbols E, W and V) Version "" (symbols E, W and V) 8 8 Flow in % 6 4 Flow in % ) 5 6,5 57,5 78,5 ) Command value in % ) 5 6,5 57,5 78,5 ) Command value in % osch Rexroth G, RE 997, edition: 6-5 ) ositive overlap....5% at symbol V ) ositive overlap 5% at symbols E and W

13 Directional control valves 4WRDE / Characteristic curves: Size (measured with HL46, ϑ Oil = 4 ±5 C) Stroke in % ransition function with stepped electric input signals ime in ms ilot pressure 5 bar ilot pressure bar ilot pressure 4 bar 4 ilot pressure bar 5 ilot pressure 7 bar 6 ilot pressure 4 bar Main valve, port = bar Frequency response characteristic curves mplitude ratio in d hase angle in Frequency in Hz Signal ±% Signal ±5% Signal ±5% Signal ±% ilot control valve, port X = 5 bar Main valve, port = bar RE 997, edition: 6-5, osch Rexroth G

14 4/ 4WRDE Directional control valves Characteristic curves: Size (measured with HL46, ϑ Oil = 4 ±5 C) 9 8 Dependency -9 frequency / pilot pressure 6 5 Flow in l/min mplitude in % frequency in Hz Flow/load function with maximum valve opening (tolerance ±%) 4 ilot pressure 5 bar ilot pressure bar ilot pressure 4 bar 4 ilot pressure bar 5 ilot pressure 7 bar 6 ilot pressure 4 bar 5 5 Valve pressure differential in bar Rated flow 5 l/min Rated flow 5 l/min Rated flow l/min 4 Recommended flow limitation (flow velocity m/s) Δp = p p L p Δp Valve pressure differential p p L p Inlet pressure Load pressure Return flow pressure osch Rexroth G, RE 997, edition: 6-5

15 Directional control valves 4WRDE 5/ Characteristic curves: Size 6 (measured with HL46, ϑ Oil = 4 ±5 C) Stroke in % ransition function with stepped electric input signals ime in ms ilot pressure 5 bar ilot pressure bar ilot pressure 4 bar 4 ilot pressure bar 5 ilot pressure 7 bar 6 ilot pressure 4 bar Main valve, port = bar Frequency response characteristic curves mplitude ratio in d hase angle in Frequency in Hz Signal ±% Signal ±5% Signal ±5% Signal ±% ilot control valve, port X = 5 bar Main valve, port = bar RE 997, edition: 6-5, osch Rexroth G

16 6/ 4WRDE Directional control valves Characteristic curves: Size 6 (measured with HL46, ϑ Oil = 4 ±5 C) Dependency -9 frequency / pilot pressure Flow in l/min mplitude in % frequency in Hz Flow/load function with maximum valve opening (tolerance ±%) ilot pressure 5 bar ilot pressure bar ilot pressure 4 bar 4 ilot pressure bar 5 ilot pressure 7 bar 6 ilot pressure 4 bar 5 7 Valve pressure differential in bar Rated flow 5 l/min Rated flow l/min Recommended flow limitation (flow velocity m/s) Δp = p p L p Δp Valve pressure differential p p L p Inlet pressure Load pressure Return flow pressure osch Rexroth G, RE 997, edition: 6-5

17 Directional control valves 4WRDE 7/ Dimensions: Size (dimensions in mm) (7) 6 (77) ,5 7 8 F F,/ 7 X Y Rzmax 4 F4 F Required surface quality of the valve contact surface 8 ilot control valve Directional sandwich plate valve (only included with version "WG") Cabling 4 Main stage 5 Name plate 6 Identical seal rings for ports,,, and 7 Identical seal rings for ports X and Y 8 Machined valve contact surface; porting pattern according to ISO (ports X and Y as required) 9 Space required to remove the mating connectors Mating connector, separate order, see page 9 Subplates (separate order) with porting pattern according to ISO see data sheet 45. Notice: he dimensions are nominal dimensions which are subject to tolerances. Valve mounting screws see page 9. RE 997, edition: 6-5, osch Rexroth G

18 8/ 4WRDE Directional control valves Dimensions: Size 6 (dimensions in mm) (6) (6) Ø 9 F F5 G F 94 L X Y,/ Rzmax 4 F4 G F6 F Required surface quality of the valve contact surface 4 ilot control valve Directional sandwich plate valve (only included with version "WG") Cabling 4 Main stage 5 Name plate 6 Identical seal rings for ports,,, 7 Identical seal rings for ports X, Y, and L 8 Machined valve contact surface; porting pattern according to ISO (ports X, Y and L as required) 9 Space required to remove the mating connectors Mating connector, separate order, see page 9 Locking pin Subplates (separate order) with porting pattern according to ISO see data sheet 45. Notice: he dimensions are nominal dimensions which are subject to tolerances. Valve mounting screws see page 9. osch Rexroth G, RE 997, edition: 6-5

19 Directional control valves 4WRDE 9/ Dimensions Valve mounting screws (separate order) Size Quantity Hexagon socket head cap screws Material number 4 ISO M6 x flZn-4h-L tightening torque M =.5 Nm ±% 6 ISO M6 x flZn-4h-L tightening torque M =. Nm ±% 4 ISO M x flZn-4h-L tightening torque M = 58 Nm ±% R958 R95 R96 Notice: For reasons of stability, exclusively these valve mounting screws may be used. he tightening torque of the hexagon socket head cap screws refers to the maximum operating pressure. ccessories (separate order) Directional control valve Mating connector Version Material number Round connector according to EN Mating connector (assembly kit) for a cable diameter of mm R967 (7-pole, plastic variant) Mating connector with m cable, 7 x.75 mm, assembled R9448 Mating connector with 5 m cable, 7 x.75 mm, assembled R9449 Mating connector with m cable, 7 x.75 mm, assembled R94496 C D F E 9 Ø7 Round connector according to EN (7-pole, metal design) Mating connector (assembly kit) for a cable diameter of mm R989 C D F E 85 Ø8,4 RE 997, edition: 6-5, osch Rexroth G

20 / 4WRDE Directional control valves ccessories (separate order) Sandwich plate valve Mating connectors Data sheet Material number Mating connector according to DIN EN 75-8, ISO e.g. R97 (plastic) Miscellaneous Filter element and seal Material number R96949 Further information Directional servo valve with mechanical position feedback Data sheet 9564 Subplates Data sheet 45 Hydraulic fluids on mineral oil basis Data sheet 9 Flame-resistant hydraulic fluids - containing water (HFE, HFS, HF, HFC) Data sheet 9 Reliability characteristics according to EN ISO 849 Data sheet 8 Hexagon socket head cap screw, metric/nc Data sheet 896 General product information on hydraulic products Data sheet 78 Installation, commissioning and maintenance of servo valves and high-response valves Data sheet 77 Hydraulic valves for industrial applications Data sheet 76- ssembly, commissioning and maintenance of hydraulic systems Data sheet 79 Selection of filters Information on available spare parts osch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 () 9 5 / 8- documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of osch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. osch Rexroth G, RE 997, edition: 6-5