4/3 proportional directional valve direct operated, with integrated electronics

Transcription

1 4/ proptional directional valve direct operated, with integrated electronics RE 2964/. Replaces: 2.2 /6 Type 4WREEM Sizes 6 and Component series 2X Maximum operating pressure 5 bar Maximum flow: 9 l/min (size 6) l/min (size ) Table of contents Contents Page Features Ordering code 2 Symbols 2 Function, section Technical data 4, 5 Electrical connection, mating connects 5 Integrated electronics 6, 7 Characteristic curves Device dimensions 5, 6 Features Direct operated proptional directional valve f controlling flow direction and flow size Operation by means of proptional solenoids with central thread and detachable coil Electrical position feedback Integrated electronics (OBE) with B6 interface Moniting of control spool position With without step function Spring-centered control spool F subplate mounting: Pting pattern accding to ISO 44 Infmation on available spare parts:

2 2/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Ordering code 4WRE E M 2X G24 K4 B6 V * With integrated electronics (OBE) = E Moniting of control spool position = M Size 6 = 6 Size = Control spool symbols a b a b A P B T = E; E = W; W With symbols E and W : P A: q V max B T: q V /2 P B: q V /2 A T: q V max Notice: In the zero position, spools W and WA have a connection from A to T and B to T with approx. % of the relevant nominal cross-section. Further details in the plain text Seal material V = FKM seal Electronics interface B6 = Command value ± VDC Electrical connection K4 = Without mating connect with connect accding to DIN 4 65 Mating connect - separate der, see page 5 Supply voltage G24 = Direct voltage 24 V 2X = 2 to 29 (2 to 29: Unchanged installation and connection dimensions) Option no code = Without step function J = Electr. compensation of the control spool overlap Rated flow with valve pressure differential Δp = bar Size 6 4 = 4 l/min 8 = 8 l/min 6 = 6 l/min 2 = 2 l/min Size 25 = 25 l/min 5 = 5 l/min 75 = 75 l/min Symbols Type 4WREEM. E Type 4WREEM. W G A B G A B a P T b a P T b

3 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG /6 Function, section The 4/ proptional directional valves are designed as direct operated devices in plate design. Operation is effected by proptional solenoids with central thread and detachable coil. The solenoids are controlled by the internal electronics. In version 4WREEM..., the valve is equipped with a symmetric spool overlap and features an operating direction and spool central position moniting function. In addition, the 4WREEM...J... model has a step function to compensate this overlap. This means that the spool overlap is quickly passed. The valve is mainly used in machines with high safety requirements, e.g. in hydraulic press controls. Set-up: The valve basically consists of: Housing () with connection surface Control spool (2) with compression springs ( and 4) Solenoids (5 and 6) with central thread Position transducer (7) Integrated electronics (8) Functional description: With de-energized solenoids (5 und 6), central position of the control spool (2) by compression springs ( and 4) Direct operation of the control spool (2) by controlling a proptional solenoid, e.g. solenoid "b" (6) Displacement of the control spool (2) to the left proptional to the electric input signal Connection from P to A and B to T via ifice-type cross-sections with progressive flow characteristic Switching off of the solenoid "b" (6) The compression spring () brings the control spool (2) back into the central position If no enable signal is available, the output stage is locked and the valve is not functional. The readiness f operation of the output stages can be queried via pin 8. If the supply voltage fails if no command value is available, the valve control spool is maintained in the central position by centering springs. In this spool position of the E spool: A, B, P and T are blocked and in the W spool: A and B are connected to T Moniting function: Moniting the control spool position via an inductive position transducer Output signals of the integrated electronics can be evaluated by an external safety control in der to detect any malfunction of the valve The power output stages are blocked by switching off the voltage f release (pin ) Notice: Not released f switching-off accding to EN849! The output stages are enabled via the enable input (pin ). The status message is sent via pin 8 Leading out the signals to the signal outputs pin 9, pin and pin of the connect Triggering of the logic switching status signals when the threshold values (+ Xw and Xw) are exceeded Use of the switching signals in a superi control f moniting functions Precondition f the use as safety-relevant component in hydraulic circuits: The entire control must meet the requirements of the standards that are relevant f the application, such as e.g. EN69, EN2622 EN849 If the safety is called up if the control detects an err, switching off the supply voltage (pin and pin 2) and release (pin ) must cause the valve to be switched off The valve must not be operated vertically with the spool position sens hanging upside down Imptant notice! The PG fitting (9) must not be opened. Mechanical adjustment of the adjustment nut located below is prohibited and damages the valve! Notice! Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle. The tank line must not be allowed to run empty. With cresponding installation conditions, a preload valve (preload pressure approx. 2 bar) is to be installed. 9 a b APB (T)

4 4/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Technical data (F applications outside these parameters, please consult us!) general Sizes Size 6 Weight kg Installation position Hizontal, must not be installed vertically Ambient temperature range C 2 to +5 Stage temperature range C 2 to + MTTF d values accding to EN ISO 849 Years 5 ) (f me infmation see data sheet 2) hydraulic (measured using HLP46, ϑ oil = 4 C ±5 C) Maximum operating Pt A, B, P bar Up to 5 pressure Pt T bar Up to 2 Rated flow q V nom at Δp = bar l/min 4, 8, 6, 2 25, 5, 75 Maximum admissible flow l/min 9 Maximum admissible zero flow with l/min..6 p e = bar Hydraulic fluid See table below Hydraulic fluid temperature range C 2 to + (preferably +4 to +5) Viscosity range mm 2 /s 2 to (preferably to 46) Maximum admissible degree of contamination of the hydraulic Class 2/8/5 ) fluid, cleanliness class accding to ISO 446 (c) Hysteresis %. Range of inversion %.5 Response sensitivity %.5 Zero shift upon change of hydraulic %/ K <.5 fluid temperature and operating pressure %/ bar <. ) The cleanliness classes specified f the components must be adhered to in hydraulic systems. Effective filtration prevents faults and at the same time increases the life cycle of the components. F the selection of the filters see Hydraulic fluid Classification Suitable sealing materials Standards Mineral oils and related hydrocarbons HL, HLP NBR, FKM DIN 5524 Flame-resistant containing water HFC (Fuchs HYDROTHERM 46M, Petrofer Ultra Safe 62) NBR ISO 2922 Imptant infmation on hydraulic fluids! F me infmation and data on the use of other hydraulic fluids refer to data sheet 922 contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! The flash point of the process and operating medium used must be 4 K higher than the maximum solenoid surface temperature. Flame-resistant containing water: Maximum pressure differential per control edge 75 bar. Pressure pre-loading at the tank pt > 2 % of the pressure differential; otherwise, increased cavitation. Life cycle as compared to operation with mineral oil HL, HLP 5 % to %.

5 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG 5/6 Technical data (F applications outside these parameters, please consult us!) electric Supply voltage Nominal voltage VDC 24 Lower limit value VDC 9 Upper limit value VDC 5 Current consumption I max A 2. plus load of switching outputs of the amplifier Impulse current A. plus load of switching outputs Command value input Voltage input "B6" V ± with Re = kω Command value output V ± Duty cycle % Maximum coil temperature ) C Up to 5 Protection class accding to DIN 45 IP 65 with mounted and locked plug-in connects ) Due to the temperatures occurring at the surfaces of the solenoid coils, the European standards ISO 72- and EN ISO 44 must be adhered to! Notice! Infmation on the environment simulation testing f the areas EMC (Electromagnetic compatibility), climate and mechanical load see RE 2948-U (declaration on environmental compatibility).64 Electrical connection, mating connects (dimensions in mm) Mating connect accding to DIN EN separate der under the material no. R (plastic version) one cable duct with Ø 2 to 4 mm, pin assignment see below Mating connect accding to DIN EN separate der under the material no. R (plastic version) two cable ducts with Ø 6 to 8 mm, pin assignment see below Pin Allocation interface B6 24 VDC (u(t) = 9. V to 5 V), I max = 2 A voltage supply 2 V Enable input 8.5 VDC to 5 VDC 4, 5 Differential amplifier input ± V command value 6, 7 Differential amplifier input ± V actual value 8 Power output stages signal output V U B 9 Control spool position P B Control spool position P A 24 VDC Control spool position zero position PE Connected to cooling element and valve housing Command value: Positive command value to + V at pin 4 and reference potential at pin 5 result in flow from P A and B T. Negative command value to V at pin 4 and reference potential at pin 5 result in flow from P B and A T. Actual value: Positive actual value to + V at pin 6 and reference potential at pin 7 result in flow from P A and B T. Negative actual value to V at pin 6 and reference potential at pin 7 result in flow from P B and A T. Connection cables: Recommendation: Up to 25 m cable length type LiYCY 7 x.75 mm 2 Up to 5 m cable length type LiYCY 7 x. mm 2

6 6/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Integrated electronics Block diagram Interface Integrated electronics (OBE) Valve Command value input ± V 4 Reference 5 Actual value input Signal 6 Measurement zero 7 Voltage supply 24 V GND 2 Protective earthing conduct Differential amplifier U U Power supply unit U U Ramp generat 2) Step function generat Zero point valve Oscillat Daughter board with controller and position analysis Summing device S Clock generat output stage Output stage U I Output stage U I Enable Current load P B 9 Zero position P A Output stage 8 & ³ Logic switching statuses f control spool position moniting Pin 9 Pin Pin Control spool position X B P Xw +Xw P A Control spool position X Logic signal linking Control spool Direction of flow Logic switching statuses position Pin 9 Pin Pin X < Xw B P Xw X Xw - X > Xw P A V 24 VDC (9. V to 5 V)

7 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG 7/6 Integrated electronics Marking and adjustment elements : + 24V 2: V : enable 4: CS ±V 5: CS ref. 6: FBS ±V 7: FBS ref. 8: Pow.St. OFF; 24 V 9: Spool pos. center P -> B : Spool pos. center P -> A : Spool pos. center PE: earth conduct *R997574* a G Rexroth A B 4WREEM6 b A Material no. 2 Production der number Date of production 4 Serial number Type designation 6 Setting the ramp time

8 8/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Characteristic curves: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C, p = bar) 4 l/min rated flow at bar valve pressure differential Command value in % Δp with step function = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant 8 l/min rated flow at bar valve pressure differential Command value in % with step function Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant 6 l/min rated flow at bar valve pressure differential Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant Command value in % with step function Δp = valve pressure differential (inlet pressure p P minus load pressure p L minus return flow pressure p T )

9 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG 9/6 Characteristic curves: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C, p = bar) 2 l/min rated flow at bar valve pressure differential 2 5 Recommended maximum flow Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant with step function Command value in % Δp = valve pressure differential (inlet pressure p P minus load pressure p L minus return flow pressure p T ) Perfmance limit: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C) Rated flow 4 l/min Valve pressure differential in bar Rated flow 8 l/min Valve pressure differential in bar Command value = %

10 /6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Perfmance limit: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C) Rated flow 6 l/min Recommended maximum flow Valve pressure differential in bar Rated flow 2 l/min Valve pressure differential in bar Command value = % Recommended maximum flow

11 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG /6 Transition function with stepped electric input signals: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C, p s = bar) Stroke in % Signal change in % Time in ms 2 Frequency response characteristic curves: Size 6 (measured using HLP46, ϑ oil = 4 C ±5 C, p s = bar) 5 Amplitude ratio in db Phase angle in Frequency in Hz Signal ± % Signal ±25 % Signal ± %

12 2/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Characteristic curves: Size (measured using HLP46, ϑ oil = 4 C ±5 C, p = bar) 25 l/min rated flow at bar valve pressure differential Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant with step function Command value in % 5 l/min rated flow at bar valve pressure differential Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant with step function Command value in % Δp = valve pressure differential (inlet pressure p P minus load pressure p L minus return flow pressure p T )

13 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG /6 Characteristic curves: Size (measured using HLP46, ϑ oil = 4 C ±5 C, p = bar) 75 l/min rated flow at bar valve pressure differential Recommended maximum flow Δp = bar constant 2 Δp = 2 bar constant Δp = bar constant 4 Δp = 5 bar constant 5 Δp = bar constant 2 5 with step function Command value in % Δp = valve pressure differential (inlet pressure p P minus load pressure p L minus return flow pressure p T ) Perfmance limit: Size (measured using HLP46, ϑ oil = 4 C ±5 C) Rated flow 25 l/min Valve pressure differential in bar Rated flow 5 l/min Recommended maximum flow Valve pressure differential in bar Command value = %

14 4/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Perfmance limit: Size (measured using HLP46, ϑ oil = 4 C ±5 C) Rated flow 75 l/min Recommended maximum flow Valve pressure differential in bar Command value = % Transition function with stepped electric input signals: Size (measured using HLP46, ϑ oil = 4 C ±5 C, p s = bar) Stroke in % Signal change in % Time in ms Frequency response characteristic curves: Size (measured using HLP46, ϑ oil = 4 C ±5 C, p s = bar) 5 Amplitude ratio in db Signal ± % Frequency in Hz Signal ±25 % Signal ± % Phase angle in

15 RE 2964/. 4WREEM Hydraulics Bosch Rexroth AG 5/6 Dimensions: Size 6 (dimensions in mm) ca "a" 42 "b" 2,5 47,5 Valve housing Proptional solenoid "a" with inductive position transducer Proptional solenoid "b" 4 R-ring 9.8 x.5 x.78 (pts P, A, B, T) 5 Space required to remove the mating connect 6 Integrated control electronics 7 Mating connect accding to DIN EN 752-4, der separately, see page 5 8 Name plate 9 Processed valve contact surface, pting pattern accding to ISO Deviating from the standard: Pts P, A, B, T Ø8 mm Be G can be eliminated, as there is no pin in the valve. 4,5 5, 44 69,2 8, ,5 2 F A F4 9 Ø45,4 76,/ T Rzmax 4 P G F2 B F Notice! The dimensions are nominal dimensions which are subject to tolerances. Required surface quality of the valve contact surface Subplates and valve mounting screws see page 6

16 6/6 Bosch Rexroth AG Hydraulics 4WREEM RE 2964/. Dimensions: Size (dimensions in mm) ca ,5 "a" "b" 72, ,5 54, ,2 9, 7, 2,5 Valve housing 2 Proptional solenoid "a" with inductive position transducer Proptional solenoid "b" 4 R-ring. x.6 x 2. (pts P, A, B, T, T) 5 Space required to remove the mating connect 6 Integrated control electronics Mating connect accding to DIN EN 752-4, der separately, see page 5 8 Name plate 9 Processed valve contact surface, pting pattern accding to ISO ,/ Rzmax 4 Required surface quality of the valve contact surface 72 2 T F A F4 P 94 B 9 F2 T F Hexagon socket head cap screws Material number Size 6 4x ISO M5 x Tightening tque M A = 8,9 Nm ± % Size 4x ISO M6 x Tightening tque M A = 5.5 Nm ± % Notice: The tightening tque of the hexagon socket head cap screws refers to the maximum operating pressure! Subplates Data sheet Size Size 4554 Notice! The dimensions are nominal dimensions which are subject to tolerances. Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 () 9 52 / 8- documentation@boschrexroth.de This document, as well as the data, specifications and other infmation set fth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition suitability f a certain application can be derived from our infmation. The infmation 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.