4/3-way servo solenoid directional control valves with electrical position feedback (Lvdt DC/DC) (ruggedized design)

Transcription

1 1/16 4/3-way servo solenoid directional control valves with electrical position feedback (Lvdt DC/DC) (ruggedized design) RE 2984/1.9 Replaces: 1.5 Type 4WRL Sizes (N) 1, 16, 25 Unit series 3 Maximum working pressure P,, 35 bar Nominal flow rate l/min ( p 1 bar) List of contents Contents Page Features 1 Ordering data 2 Symbols, accessories 3 Function, sectional diagram 4 Control oil supply 5 Technical data 6 and 7 Valve with external trigger electronics 8 and 9 Characteristics curves 1 and 11 Unit dimensions 12 to 14 For information regarding the available spare parts see: Features Pilot operated 4/3-way servo solenoid directional control valves N1 to N25 Pilot valve N6, with control piston and sleeve in servo quality and sturdy design, actuated on one side, 4/4 fail-safe position when switched off Position transducer (Lvdt DC/DC) with metal cap Main stage in servo quality with position feedback Flow characteristic M = Progressive with fine metering notch P = Non-linear curve L = Linear For subplate attachment, mounting hole configuration N1 to ISO , N16 to ISO and N25 to ISO Subplates as per Technical Data Sheet, N1 RE 4555, N16 RE 4557 and N25 RE 4559 (order separately) Plug-in connectors to DIN M6, see Technical Data Sheet RE 88 (order separately) External trigger electronics (order separately) Electric amplifier for standard curves M and L Electric amplifier for non-linear curve P

2 2/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Ordering data 4WRL 3 24 K M 75 For external trigger electronics = no desig. N1 = 1 N16 = 16 N25 = 25 Control spool symbols 4/3-way version a b With symbol V1: P : q v T: q v /2 P : q v /2 T: q v 1) Q N : Flow characteristic M or L 2) Q N : Flow characteristic P = V, V1 Ruggedized 75 = design M = NR seals, suitable for mineral oils (HL, HLP) to DIN Electrical connection K = without plug-in connector, with plug to DIN M6 Order plug-in connector separately Control oil inlet x control oil outlet y No designation = x = external, y = external E = x = internal, y = external ET = x = internal, y = internal T = x = external, y = internal Power supply of trigger electronics 24 = +24 V DC 3 = Unit series 3 to 39 (installation and connection dimensions unchanged) Flow characteristic M = Progressive with linear fine metering P = Non-linear curve 2), linear (kink at 4 %) L = Linear Nominal flow rate at 1 bar valve pressure difference (5 bar per metering notch) N1 4 = 4 l/min 2) 55 = 55 l/min 1) 7 = 7 l/min 2) 85 = 85 l/min 1) N16 9 = 9 l/min 2) 12 = 12 l/min 1) 15 = 15 l/min 2) 2 = 2 l/min 1) N25 3 = 3 l/min 2) 37 = 37 l/min 1)

3 RE 2984/1.9 4WRL Hydraulics osch Rexroth 3/16 Symbols a b M: Progressive with fine metering P: Non-linear, linear (4 %) L: Linear Q Q Q Ds 2% 4% Ds Ds 2% 4% ccessories, not included in delivery Fastening bolts f 7 TE 6P+PE (Pg16) N1 4 x ISO 4762-M6 x N67F N16 2 x ISO 4762-M6 x N67F x ISO 4762-M1 x N67F N25 6 x ISO 4762-M12 x N67F VT-VRR /V/2STV, see RE VT-VRR /V/K4-C-2STV, see RE Plug-in connector not included in delivery, also see RE Testing and service equipment Test box type VT-PE-T2, see RE 364 Test adapter type VT-P-3, see RE 37

4 4/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Function, sectional diagram Construction The valve consists of two main assemblies: Pilot valve (1) with control spool and sleeve, return springs, control solenoid and inductive position transducer Main stage (2) with centering springs and position feedback 1 2 T P Y Functional description When the control solenoid is not actuated, the control spool is held by springs in the fail-safe position, and the main stage spool remains in spring-centered mid position at % of the stroke in the direction P-/-T. In the on-board electronics, the pre-defined setpoint is compared with the actual value for the position of the main stage control spool. In the event of an error signal, the control solenoid is actuated, and the pilot spool is moved as the magnetic force changes. The flow released through the control cross-sections causes the main control spool to move. The stroke/control cross-section of the main control spool is controlled proportionately to the setpoint. If the input setpoint is V, the electronics move the main stage control spool to mid position. The control oil is conveyed to the pilot valve either internally via port P or externally via port. The oil returns to the tank internally via port T or externally via port Y. Power failure In the event of a power failure or an open circuit, the on-board electronics cut off the electricity to the control solenoid and the pilot spool moves to the fail-safe position, relieving the control oil chambers of the main stage. The main stage control spool is held by springs in mid position.

5 RE 2984/1.9 4WRL Hydraulics osch Rexroth 5/16 Control oil supply The pilot valve can be supplied both via ports and Y (externally) and via the main flow channels P and T. N1, 25 N16 Pv Tv Tv Pv Y Y P T P Symbol in detail (external control oil inlet and outlet) Type Type E... a a Y Y b b P P a a b b Y T T Main valve Pilot valve Type ET... a b Type T... a b No designation = x = external y = external E = x = internal y = external ET = x = internal y = internal T = x = external y = internal Important Hydraulic symbols are largely derived from the symbols of the switching valves. 4/3-way servo solenoid directional control valves (pilot operated) do not have a closed mid position when switched off! They only perform their function in an active, closed control loop, even if the pilot valve features a fail-safe 4th position. See technical data for details on switch-off behavior.

6 6/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Technical data eneral Construction Spool type valve, pilot operated ctuation Servo solenoid directional control valve N6, with position controller for pilot valve and main stage, external electric amplifier Type of mounting Subplate, mounting hole configuration N to ISO Installation position Optional mbient temperature range C Weight kg N1 8.6 N N Vibration resistance, test condition Max. 4 g, shaken in 3 dimensions (24 h) Hydraulic (measured with HLP 46, oil = 4 C ±5 C) Pressure fluid Hydraulic oil to DIN , other fluids after prior consultation Viscosity range recommended mm 2 /s max. permitted mm 2 /s Pressure fluid temperature range C Maximum permissible degree of contamination of pressure fluid Purity class to ISO 446 (c) Class 18/16/13 1) Flow direction See symbol Nominal flow at N1 N16 N25 p = 5 bar per notch 4) l/min 4 3) 55 1) 7 2) 85 3) 9 2) 12 3) 15 2) 2 3) 3 2) 37 3) Max. working pressure Ports P,, bar 35 Max. pressure Ports T,, Y bar 25 Min. control oil pressure in pilot stage bar 1 Q max l/min Q N pilot valve l/min Leakage of pilot valve at 1 bar cm 3 /min < 18 < 3 < 5 Leakage of main stage at 1 bar cm 3 /min < 4 < 6 < 1 < 1 Static/Dynamic Hysteresis %,.1 scarcely measurable Manufacturing tolerance for Q max % % 1 Response time for signal change...1 % (at = 1 bar)...1 % Response time for signal change...1 % (at = 1 bar)...1 % Switch-off behavior fter electrical switch-off: pilot valve in fail-safe Main stage moves to spring-centered mid position : % P-/-T Thermal drift Zero point displacement <1 % at T = 4 C Zero adjustment djustable ±5 % via valve amplifier 1) The purity classes stated for the components must be complied with in hydraulic systems. Effective filtration prevents problems and also extends the service life of components. For a selection of filters, see Technical Data Sheets RE 57, RE 576 and RE ) Characteristic curve: P (non-linear). 3) Characteristic curve: M or L 4) Flow rate at a different Δp Q x = Q nom p! w x 5

7 RE 2984/1.9 4WRL Hydraulics osch Rexroth 7/16 Technical data Electrical Cyclic duration factor % 1 ED Power supply 24 V DC nom (external electric amplifier) Degree of protection IP 65 to DIN 45, plug-in connector correctly fitted Solenoid and position transducer connector Max. solenoid current 2.7 Coil resistance R 2 Ω 2.5 Max. power consumption at 1 % load and operating temperature V 4 Position transducer DC/DC technology To DIN M6 (plug-in connector ) Pg16 For pin assignment, see block diagram on pages 8 and 9 Supply: +15 V/35 m 15 V/25 m ll characteristics only in connection with valve amplifier Important Pilot operated 4/3-way servo solenoid directional control valves only perform their function in an active closed control loop and do not have a fail-safe position when switched off. For this reason, many applications require the use of external check valves, which must be taken into account during the On/Off switching sequence. Signal:...±1 V (R L ^1 kω)

8 8/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Valve with external trigger electronics (standard linear curve: M, L) lock diagram/pin assignment Safety Sicherheitslogik logics +1V/1m z 32 Potentiometersupply Versorgung 1V/1m b 32 b 12 Control Steuer-Null zero 8.5V= ON 1k +1V 1V +15V 15V Zero Justierung adjustment Nullpunkt 5% z 16 +1V max 4V= Enabling Freigabe green grün max 4V +U K 24V Error Fehler z 22 24V=/ V max 1m b 14 Control Steuer-Null zero St V 1V red rot U yellow gelb Lvdt. DC DC DS DS N1 N16 N25 1k z 2 V 1V oder or 1V V U E 1k z 2 +U 24V DC/max = / supply Versorgung +U K + z mf/63v = b 4 >1% ripple (U ) b 2 z 28 b 2 Signalinputs Eingänge Neutral Sternpunkt V V b 2 Power Leistungs-Null zero z 28 Steuer-Null Control zero 1V + Ref b 26 z 3 b 28 b 3 1V b 22 Ref Differential Differenzverstärker amplifier + 15V= supply 15V = supply b 24 +U K b 6 b 8 - C Feedback signal/pilot stage D zero C F E D solenoid solenoid Feedback signal/main stage F E D C S U E F S U Versions of trigger electronics With non-linear curve and surface area compensation, see RE 343 With integrated p/q controller, see RE 358

9 RE 2984/1.9 4WRL Hydraulics osch Rexroth 9/16 Valve with external trigger electronics (non-linear curve: P) lock diagram/pin assignment red rot U yellow gelb Lvdt. DC z 2 +U 24V DC/max = / supply Versorgung +U K + z mf/63v = b 4 >1% ripple (U ) b 2 Neutral Sternpunkt V V b 2 Power Leistungs-Null zero z 28 Control Steuer-Null zero +U K DC DS z 28 N1 N16 N25 b 26 z 3 b 28 b 3 1V + Ref F E D C DS 1V b 22 b 24 Ref b V= supply - 15V = supply C Feedback signal/pilot stage D zero E solenoid F solenoid Feedback signal/main stage b 8 S U F E C D S U +1V +1V/1m z 32 b 32 Potentiometersupply Versorgung 1V 1V/1m 15V 1V b 12 Control Steuer-Null zero +15V 15V 8.5V= ON 1k z 16 Enabling Freigabe Safety Sicherheitslogik logics +1V max 4V= green grün max 4V +U K Zero Justierung adjustment Nullpunkt 24V Error Fehler z 22 24V=/ V max 1m b 14 Control Steuer-Null zero 5% 1k z 2 1V oder or V V U E Signalinputs Eingänge St k b 2 1V Differential Differenzverstärker amplifier Daughter Tochterkarte card 1V 1V + S,4V - P1 Ventil Valve 4% % P2 C gain Versions of trigger electronics With standard linear curve, see RE 345 With integrated p/q controller, see RE 358 fine E K3

10 1/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Characteristic curves (measured with HLP 46, oil = 4 C ±5 C) Flow rate signal function Q = f (U E ) Flow characteristic M Flow characteristic P Q [%] Q [%] 1 P- Calibrated 1 P- 8 -T(1:1) 8 -T(1:1) 6 -T(2:1) 1% T(2:1) 2 2 1% Q N -U D E [V] U D E [V] U D E [V] 1% Q N U D E [V] Q [%] Q [%] Flow characteristic L Q [%] 1 8 P- -T(1:1) 6 -T(2:1) 4 2 -U D E [V] U D E [V] Q [%] Pressure gain Dp [%p P ] 1 Dp a Y b U E [%] U E [%] P P 8 1 Dp [%p P ]

11 RE 2984/1.9 4WRL Hydraulics osch Rexroth 11/16 Characteristic curves (measured with HLP 46, oil = 4 C ±5 C) ode diagram N1 N16 mplitude d P S = 1 bar f [Hz] 1% 1% 5% 5% w Phase mplitude d P S = 1 bar f [Hz] 1% 1% 5% 5% w Phase N25 mplitude d P S = 1 bar f [Hz] 1% 1% 5% 5% w Phase

12 12/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Unit dimensions N1 (nominal dimensions in mm) V= supply - 15V = supply C Feedback signal/pilot stage D zero E solenoid F solenoid Feedback signal/main stage F E C D 24 ø6, T P T Y T F1 P F2 Y T1,1/1 Rzmax 4 F4 F3 Required surface quality of mating component 1 Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 Main valve 4 Inductive position transducer (main valve) 5 Nameplate 6 O-ring 12 x 2 (ports P,,, T, T1) 7 O-ring 1 x 2 (ports, Y) 8 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: Ports P,,, T, T1 Ø1.5 mm Minimum thread depth: Ferrous metal 1.5 x Ø Non-ferrous 2 x Ø Subplates, see Technical Data Sheet RE 4555 Valve fastening bolts (order separately) The following valve fastening bolts are recommended: 4 cheese-head bolts ISO 4762-M6x4-1.9-N67F821 7 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 11+3 Nm Material no

13 RE 2984/1.9 4WRL Hydraulics osch Rexroth 13/16 Unit dimensions N16 (nominal dimensions in mm) V= supply - 15V = supply C Feedback signal/pilot stage D zero E solenoid F solenoid Feedback signal/main stage F E C D Y P T ø F5 1 8,1/1 Rzmax 4 96 F1 T P Y F4 2 F6 1 Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 Main valve 4 Inductive position transducer (main valve) 5 Nameplate 6 O-ring 23 x 2,5 (ports P,,, T) 7 O-ring 9 x 2 (ports, Y) F2 F3 Required surface quality of mating component 8 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: Ports P,,, T Ø 2 mm Minimum thread depth: Ferrous metal 1.5 x Ø Non-ferrous 2 x Ø Subplates, see Technical Data Sheet RE 4557 Valve fastening bolts (order separately) The following valve fastening bolts are recommended: 2 cheese-head bolts ISO 4762-M6x N67F821 7 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 11+3 Nm Material no cheese-head bolts ISO 4762-M1x5-1.9-N67F821 7 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 5+1 Nm Material no

14 14/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Unit dimensions N25 (nominal dimensions in mm) V= supply - 15V = supply C Feedback signal/pilot stage D zero E solenoid F solenoid Feedback signal/main stage F E C D ø ø F1 F5 1 F2 8,1/1 Rzmax T P Y Required surface quality of mating component F4 2 F6 1 Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 Main valve 4 Inductive position transducer (main valve) 5 Nameplate 6 O-ring 28 x 3 (ports P,,, T) 7 O-ring 15 x 2,5 (ports, Y) F3 8 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: N25: Ports P,,, T Ø 25 mm Minimum thread depth: Ferrous metal 1.5 x Ø Non-ferrous 2 x Ø Subplates, see Technical Data Sheet RE 4559 Valve fastening bolts (order separately) The following valve fastening bolts are recommended: 6 cheese-head bolts ISO 4762-M12x6-1.9-N67F821 7 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 9+3 Nm Material no

15 RE 2984/1.9 4WRL Hydraulics osch Rexroth 15/16 Notes

16 16/16 osch Rexroth Hydraulics 4WRL RE 2984/1.9 Notes osch Rexroth Hydraulics Zum Eisengießer Lohr am Main, ermany Telefon +49 () / 18- Telefax +49 () / documentation@boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of osch Rexroth. It may not be reproduced or given to third parties without its consent. The 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. The 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.