4/3-way servo solenoid directional control valves, pilot operated, with electrical position feedback and on-board electronics

Transcription

1 4/3-way servo solenoid directional control valves, pilot operated, with electrical position feedback and on-board electronics Type 4WRLE , symbols E./W. Sizes (N) 1, 16, 25, 27, 35 Unit series 3 Maximum working pressure P,, 35 bar (N27: 28 bar) Nominal flow rate l/min ( p = 1 bar) List of contents Contents Page Features 1 Ordering data 2 ccessories, function, sectional diagram 3 Control oil supply 4 Technical data 5 to 7 On-board electronics 8 Characteristic curves 9 to 11 Unit dimensions 12 to 15 For information regarding the available spare parts see: Features RE 2989/1.9 Replaces: 1.5 1/16 Pilot operated 4/3-way servo solenoid directional control valves N1 to N35, with approx. 2 % overlap Pilot valve N6, with control piston and sleeve in servo quality, actuated on one side, 4/4 fail-safe position when switched off Control solenoid with electrical position feedback and on-board electronics (OE), calibrated at the factory Main stage with position feedback Electronically calibrated and compensated overlap Spool with linear travel, with anti-rotation element Flow characteristic S = Progressive N16, 25 and 27 with load tap C1/C2 For subplate attachment, mounting hole configuration N1 to ISO , N16 to ISO , N25/27 to ISO and N35 to ISO Subplates as per Technical Data Sheet, N1 RE 4555, N16 RE 4557, N25/27 RE 4559 and N35 RE 456 (order separately) Plug-in connectors to DIN M6, see Technical Data Sheet RE 88 (order separately)

2 2/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Ordering data C1 C2 4WRL E S J 3 24 K 1 M * With on-board electronics = E N1 = 1 N16 = 16 N25 = 25 N27 1) = 27 N35 2) = 35 Control spool symbols = E, E1 Transitional symbols = E (Z), E1 (Z) C1 C2 = W, W1 = W (Z), W1 (Z) C1 C2 = E4 = W4 With symbol E1, E1(Z), E4, W1(Z), W4: P : q v T: q v /2 P : q v /2 T: q v With load tap C1/C2 (N16, 25, 27) = Z 1) N27 is a high-flow version of N25, ports P,, and T have 32 mm in the main stage. Contrary to standard ISO , ports P,, and T may be drilled to max. 3 mm in the control block. These valves therefore offer higher flow rates Q : Q Further information in plain text M = NR seals, suitable for mineral oils (HL, HLP) to DIN Interface for trigger electronics 1 = Setpoint input ±1 V Electrical connection K = without plug-in connector, with plug to DIN M6 Order plug-in connector separately Control oil supply x, control oil return y No desig. = x = external, y = external E = x = internal, y = external ET = x = internal, y = internal T = x = external, y = internal Voltage supply of trigger electronics 24 = +24 V DC 3 = Unit series 3 to 39 (installation and connection dimensions unchanged) J = Overlap compensation signal See characteristic curve range: +.5 V Flow characteristic S = Progressive Nominal flow rate at 1 bar valve pressure difference (5 bar per metering notch) N1 5 = 5 l/min 8 = 8 l/min N16 18 = 18 l/min N25 35 = 35 l/min N27 43 = 43 l/min 1) N35 11 = 11 l/min 2) 2) N35 is a high-flow version of N32, ports P,, and T have 5 mm in the main stage. Contrary to standard ISO , ports P,, and T may be drilled to max. 48 mm in the control block. These valves therefore offer higher flow rates Q : Q

3 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 3/16 ccessories, not included in delivery Fastening bolts N1 4 x ISO 4762-M6 x N67F Testing and service equipment N16 2 x ISO 4762-M6 x N67F x ISO 4762-M1 x N67F N25/27 6 x ISO 4762-M12 x N67F N35 6 x ISO 4762-M2 x N67F Plug-in connectors 6P+PE, KS also see RE 88 KS MS MS KS Test box type VT-PE-T3, see RE 365 Test adapter 6P+PE type VT-P-2, see RE 368 Function, sectional diagram Construction The valve consists of three 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 On-board trigger electronics (3) 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 its spring-centered mid position. 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 spool stroke is controlled proportionately to the setpoint of V between %. If the input setpoint is < ±.5 V, the control spool is held in the springcentered, overlapped mid position. 3 C1 T P 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. 1 C2 Y 2

4 4/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Control oil supply The pilot valve can be supplied both via ports and Y (externally) and via the main flow channels P and T. Type Type E... Type ET... Type T... N1, 25, 27, 35 a a a a Pv P No designation = x = external y = external E = x = internal y = external ET = x = internal y = internal T = x = external y = internal Tv Y T Y Y b b b b N16 Tv Y Pv Symbol in detail (external control oil inlet and outlet) P P a a b P b Y T T Main valve Pilot valve

5 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 5/16 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 Type of mounting Subplate, mounting hole configuration N to ISO Installation position Optional mbient temperature range C Weight kg N1 8.7 N N N N35 81 Vibration resistance, test condition Max. 25 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 N27 N35 p = 5 bar per notch 2) l/min 5, Max. Ports P,, working (external control oil inlet) bar pressure Ports P,,, bar 28 Ports T, Y bar 25 Min. control oil pressure in pilot stage bar 8 Q max l/min Q N pilot valve (inlet) p = 35 bar l/min Leakage of pilot valve at = 1 bar cm 3 /min <15 <18 <35 <5 <11 Leakage of main stage control spool symbols E at P = 1 bar l/min <.25 <.4 <.6 <.6 <1.1 Static/Dynamic Overlap in mid position ª % of spool stroke, electrically compensated for U D E ±.5 V Spool stroke, main stage ± mm ,5 Control oil volume of main stage 1 % cm Control oil requirement...1 %, (at = 1 bar) l/min Hysteresis % <.1, scarcely measurable Manufacturing tolerance % < ± 5 (Q max ) Response time for...1 %, (at = 1 bar) ms <4 <8 <8 <8 <13 Response time for...1 %, (at = 1 bar) ms <15 <25 <25 <25 <5 Switch-off behavior fter electrical switch-off (pilot valve in fail-safe) Main stage moves to spring-centered overlapped mid position Thermal drift <1 % at T = 4 C Calibration t the factory ±1 %, see flow curve Electromagnetic compatibility EN : 22-8 EN : ) 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 ) Flow rate at a different p Q x = Q nom p! w x 5

6 6/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Technical data Electric pilot valve N6, trigger electronics integrated in the valve Cyclic duration factor % 1 ED Degree of protection IP 65 to DIN 45 and IEC 14434/5 Connection Plug-in connector 6P+PE, DIN Power supply Terminal : Terminal : V Power consumption External fuse Input, Standard version Terminal D: U E Terminal E: Max. differential input voltage at V Test signal, Standard version Terminal F: U Test Terminal C: Protective conductor and screen Recommended cable Calibration Supply 24V = Signal: +/ 1 V LVDT Sign.: +/ 1 V Version: Standard N6/1 Mainstage Important Pilot operated 4/3-way servo solenoid directional control valves with positive overlap perform their function in open or closedloop-controlled axes and have approx. 2 % overlap when switched off. This condition does not constitute an active fail-safe position. For this reason, many applications require the use of external check valves or certain sandwich-mounted valves, which must be taken into account during the On/Off switching sequence. P- 24 V DC nom min. 21 V DC/max. 4 V DC Ripple max. 2 V DC Solenoid h 45 mm = 4 V max. 2,5 F Differential amplifier, R i = 1 kω...±1 V V D E 6 max. 18 V DC LVDT...±1 V Reference V See pin assignment See pin assignment up to 2 m 7 x.75 mm 2 up to 4 m 7 x 1 mm 2 Overlap and P at +8 V, calibrated at the factory, see valve characteristic curve LVDT Sign. +/ 1V P- 1V +1V Logic 1 or 2 Stage Stroke II sign. +/ 1V Stroke II sign. DC/DC LVDT Signal: +/ 1V

7 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 7/16 Connection For electrical data, see page 6 24 V= 1 Control 2 Provided by customer 3 Plug-in connector 4 Valve 5 Connecting surface 6 Provided by Rexroth Technical notes on the cable Version: Multi-wire cable Extra-finely stranded wire to VDE 295, Class 6 Protective conductor, green/yellow Cu braided screen Types: e.g. Ölflex-FD 855 CP (from Lappkabel company) No. of wires: Determined by type of valve, plug type and signal assignment Cable Ø:.75 mm 2 to 2 m length 1. mm 2 to 4 m length Outside Ø: mm Pg mm Pg Important 3 4 PT Voltage supply 24 V DC nom., if voltage drops below 18 V DC, rapid shutdown resembling Enable OFF takes place internally. In addition, with the m signal version: I D E 3 m valve is active I D E 2 m valve is deactivated. Electrical signals emitted via the trigger electronics (e.g. actual values) must not be used to shut down safetyrelevant machine functions! (See European Standard, Technical Safety Requirements for Fluid-Powered Systems and Components Hydraulics, EN 982.) 5 6

8 8/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 On-board electronics lock diagram/pin assignment Version 1: U D E ±1 V 1 15 V= 2 ref V= 4 Signal ±1 V Pin assignment 6P+PE Version 1: U D E ±1 V (R i = 1 kω) Test + PD U U E prot. ground +24 V = V 1 V (Signal) V (Signal) SL +U +15 V 15 V U S DC + U DC Logics Logik S PID +U 4/3-way 4/3-Regel-Wegeventil servo solenoid directional control valve 1k 1k 1k C D E F SL C D E F +24 V = V 1k 1k 2.5 F +24 V= Power Versorgung supply V Supply Versorgungs-Null zero U D E Reference Referenz-Null* zero* Setpoint Sollwert...±1 V ctual Istwert value...±1 V V Protective Schutzleiterconductor Screen bschirmung * Nicht Do not mit connect Versorgungs-Null to supply verbinden! zero! Signal U D E +1 V U D E V U D E 1 V V internal (ref. (Ref.-) Differential Differenzverstärker amplifier LVDT signal Signal ±1 V Hauptstufe Main stage Differentiaverstärker Differenz- amplifier Vorsteuerstufe Pilot stage 4/3-way servo solenoid directional 4/3-Regel- Wegeventil control valve Valve Ventil

9 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 9/16 Characteristic curves (measured with HLP 46, oil = 4 C ±5 C) Flow rate signal function Q = f (U D E ) Symbol E(Z), W(Z) (Q : Q = 1 : 1) E1(Z), W1(Z) (Q : Q = 2 : 1) Volumenstrom Flow rate Q Q 1% % -1% 1% P- (2:1) PT P- -T % Stroke Hub(%) (%) comp.* ,5,5 Symbol E4, W4 (Q : Q = 2 : 1) Volumenstrom Flow rate Q Q -1% -1% P- -T PT ** (V) U D-E * Comp. U D E ±.5 V factory setting ±1 % ** Q P at +8 V [U D E ] manufacturing tolerance Q max ±5 % PT PT PT -T P- -T -T(2:1) P % Stroke Hub(%) (%) comp.* ,5,5 ** (V) U D-E Control spool with asymmetric metering notches Control spools with asymmetric metering notches are available in a ratio of 2:1 for the purpose of adaptation to differential cylinders. 2 : 1 Y Flow in mid position, leakage oil pressure relief With symbol E, leakage oil in the two work chambers and of the control piston gives rise to a build-up of pressure in or, which then causes a connecting cylinder to drift out of position. In many cases, the W symbol is a better solution. With a setpoint of, the control piston moves into the overlapped mid position. In this mid position, pressure is then relieved from ports and with 1 % ±.5 % Q N to T. This also supports the function of external check valves. Control spools in a differential circuit In order to produce differential circuits, valve spools with a 4th position are available. It is sufficient to install a check valve in the consumer lines. In addition, a control spool (symbol) with internal -P connection is employed for certain branch-oriented solutions. However, we recommend that you consult the RH pplication Center with regard to these special symbols, as a simulation or knowledge of this type of system is usually required. Y

10 1/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Characteristic curves (measured with HLP 46, oil = 4 C ±5 C) Load tap C1/C2 To compensate for fluctuations in the load or supply pressure, 4/3-way servo solenoid directional control valves are combined with pressure compensators. The load is tapped via a shuttle valve for the N1 and 35, and via two additional ports C1 and C2 for the N16, 25 and 27. The pressure compensator therefore always receives the correct pressure signal even in the event of negative load. When using pressure compensators, an external control oil supply should always be selected. N1, 35 C1 Y N16, 25, 27 Y C2 m

11 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 11/16 Characteristic curves (measured with HLP 46, oil = 4 C ±5 C) Response time (at = 1 bar) Open Close N1 N16 N25/27 N35 U E % U E % U E % U E % ms 5ms 25ms 5ms ms 1ms 5ms 1ms ms 1ms 5ms 1ms ms 2ms U E % U E % U E % U E % ms 2ms

12 12/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Unit dimensions N1 (nominal dimensions in mm) Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 On-board electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Nameplate 7 O-ring 12 x 2 (ports P,,, T, T1) 8 O-ring 1 x 2 (ports, Y) 9 Plug-in connector not included in delivery (order separately) T P T F1 F P 3 24 F2 Y T1 F3 ø6, T Y Required surface quality of mating component 1 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: Ports P,,, T, T1 Ø 1,5 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-N67F8217 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 11+3 Nm Material no ,1/1 Rzmax

13 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 13/16 Unit dimensions N16 (nominal dimensions in mm) F1 C1 F Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 On-board electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Nameplate 7 O-ring 23 x 2.5 (ports P,,, T) 8 O-ring 9 x 2 (ports, Y, C1, C2) 9 Plug-in connector not included in delivery (order separately) T 2 F5 152 P F Y Y ø F2 C2 F Required surface quality of mating component 1 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 N67F8217 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 11+3 Nm Material no cheese-head bolts ISO 4762-M1x5-1.9-N67F8217 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = 5+1 Nm Material no ,1/1 Rzmax

14 14/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 Unit dimensions N25/27 (nominal dimensions in mm) Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 On-board electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Nameplate 7 O-ring (ports P,,, T) N25: 28 x 3 N27: 34.6 x O-ring 15 x 2.5 (ports, Y, C1, C2) 9 Plug-in connector not included in delivery (order separately) C1 F1 F F5 43 ø T P Y C2 F ø6 F2 F Required surface quality of mating component 1 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: N25: Ports P,,, T Ø 25 mm N27: Ports P,,, T Ø 32 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-N67F8217 (galvanized in accordance with osch standard N67F821 7) Tightening torque N25 M = 9+3 Nm, N27 M = 9±15 Nm Material no ,1/1 Rzmax

15 RE 2989/1.9 4WRLE Hydraulics osch Rexroth 15/16 Unit dimensions N35 (nominal dimensions in mm) F1 F4 1 Pilot valve 2 O-ring 9.25 x 1.78 (ports P,,, T) 3 On-board electronics 4 Main valve 5 Inductive position transducer (main valve) 6 Nameplate 7 O-ring x 3.53 (ports P,,, T) 8 O-ring 15 x 2.5 (ports, Y) 9 Plug-in connector not included in delivery (order separately) 43,2 2 3 ø21 F T P Y F6 1 F3 F2 ø ,1/1 Rzmax 4 Required surface quality of mating component 1 Machined valve contact surface, mounting hole configuration according to ISO Deviates from standard: Ports P,,, T Ø 48 mm Minimum thread depth: Ferrous metal 1.5 x Ø Non-ferrous 2 x Ø Subplates, see Technical Data Sheet RE 456 Valve fastening bolts (order separately) The following valve fastening bolts are recommended: 6 cheese-head bolts ISO 4762-M2x9-1.9-N67F8217 (galvanized in accordance with osch standard N67F821 7) Tightening torque M = Nm Material no

16 16/16 osch Rexroth Hydraulics 4WRLE RE 2989/1.9 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.