Control devices MA and EM

Transcription

1 Electric Drives and Controls Hydraulics Linear Motion and Assembly Technologies Pneumatics Service Control devices MA and EM RE 9 07/.05 /6 Replaces: 05.9 Technical data sheet for the variable pumps A4VSO and A4VSG series and A4CSG series open and closed circuits Contents Ordering code Standard program MA Manuel adjustment Characteristics MA 4 Unit dimensions MA 5 EM/ Electric motor adjustment 6 Technical data EM/ 7 Characteristics EM/ 8 Table of adjustment times EM/ 9 Limit switches EM/ 0 Potentiometer on EM Schematic EM/ Unit dimensions EM/ Sizes Unit dimensions EM/ Size General notes 6 Features Displacement controls for the variable pumps A4VSO, A4VSG and A4CSG Manuel by means of a hand wheel on the MA control By means of an electric motor on the EM control Different adjustment times can be selected Programmable control possible through built on limit switches with EM Optional potentiometer for feedback of swivel angle Overload coupling to protect electric motor is standard on EM control Further information: Variable pump A4VSO sizes RE 9050 Variable pump A4VSG sizes RE 900 Variable pump A4CSG sizes RE 905

2 /6 Bosch Rexroth AG MA and EM RE 9 07/.05 Ordering code Standard program A4... / Hydraulic fluid (for detailed information see RE 9050, RE 900 or RE 905) Axial piston unit / type of operation Swash plate design, variable / pump, open circuit (see RE 9050) 0 Swash plate design, variable / pump, closed circuit (see RE 900) Compact unit swash plate design, variable / pump, closed circuit (see RE 905) A4VSO A4VSG A4CSG Size Displacement V g max [cm ] Control-adjustment devices Manuel handwheel adjustment MA MA Electric motor adjustment 04 without potentiometer EM adjustment time see page 9... EM... with potentiometer EM adjustment time see page 9... EM... Series for A4VSO for A4VSG 0 0 for A4CSG 0 06 Direction of rotation 07 Seals 08 Shaft ends 09 Mounting flanges 0 Connecting options for service ports Through drives Valves Filter options detailed data see: RE 9050 A4VSO RE 900 A4VSG RE 905 A4CSG available not available

3 RE 9 07/.05 MA and EM Bosch Rexroth AG /6 MA Manuel adjustment The manual control enables a stepless adjustment of displacement by turning the handwheel. The change of displacement can be monitored via the swivel angle indicator. The MA control features a lever to lock the handwheel and thereby the displacement during operation. In the standard version the handwheel is mounted on the side of the pump (looking on the shaft end), on the side of the high pressure port. Please consult us if mounting on the side is desired. If desired, additional mechanical stops, to limit the swivel angle can be mounted. (please state in clear text when ordering). Technical data Size Control stroke (0 to V g max ) s mm 4, 7, 0,7 0,7 5,9 5,9,6 Number of revolutions on handwheel (0 to V g max ),84,40 4,4 4,4 5,8,59,6 V g Displacement change per rev. cm 4,0,0 0, 4,5 48,,7 5,4 Required torque on handwheel at p = 50 bar Nm ca dependent on size Weight approx. (A4VSO...MA...N00) kg Schematic (Example A4VSO) B B MB U S MS K K T R(L) Sub-assemblies Pump with mechanical adjustment device A4VSO (see RE 9050), A4VSG (see RE 900) or A4CSG (see RE 905) Handwheel

4 4/6 Bosch Rexroth AG MA and EM RE 9 07/.05 Characteristics MA A4VSO open circuit Please note: In variable displacement pumps A4VSO for open loop (swivel to one side of center only) a residual displacement of approx. % is permanently set as V g min. s s max V g V g max Interrelation between pump direction of rotation turning of handwheel swivel range with handwheel mounted to the (viewing on shaft end) Pump direction of rotation Direction of rotation handwheel (viewing on port B) counter clockwise clockwise Swivel range ) Direction of flow Pressure side clockwise V g min V g max V g max V g min S to B B counter clockwise V g max V g min V g min V g max S to B B ) comp. swivel angle indicator A4VSG and A4CSG closed circuit s s max V g V g max Interrelation between pump direction of rotation turning of handwheel direction of flow with handwheel mounted to the (viewing on shaft end) Pump direction of rotation s s max + V g V g max Direction of rotation handwheel (viewing on port B) Swivel range ) Direction of flow Pressure side clockwise clockwise B to A A counter clockwise A to B B counter clockwise clockwise A to B B counter clockwise B to A A ) comp. swivel angle indicator 5 0 5

5 Einschraubloch M 00 M6 (x) 0 -- M6 (x) -- #DURCHTRIEBE#/u.A4VSO40/y.apl.n00.da RE 9 07/.05 MA and EM Bosch Rexroth AG 5/6 Unit dimensions MA Sizes Dimensions valid for A4VSO, A4VSG and A4CSG Before finalising your design please request a certified installation drawing. Locking lever A Counter clockwise rotation of handwheel Clockwise rotation of handwheel B S A A R L R(L) B A 4 ø60 Sub-assemblies Pump with mechanical adjustment device A4VSO (see RE 9050), A4VSG (see RE 900) or A4CSG (see RE 905) Hand wheel Unit dimensions Size A A A A / For detailed dimensions and technical data of the variable pumps see the technical data sheets A4VSO RE 9050, A4VSG RE 900 or A4CSG RE 905

6 6/6 Bosch Rexroth AG MA and EM RE 9 07/.05 EM/ Electric motor adjustment An electric motor is used to change the pump displacement steplessly via a reducing gear and a ball-screw drive. Adjustment times may be chosen from the table on page 9. They are valid for standard motors 0/400 Volt and 50 Hz. The built on motors can also be operated at 60 Hz. The adjustment times are then reduced by approx. 0 %. For a programmed control sequence any intermediate displacements can be selected by means of built on limet switches (6). The EM features an additional potentiometer for a feedback of the actual swivel angle. The standard EM adjustment device is equipped with an overload coupling to protect the control motor. If desired, it is possible to include fixed stops for limiting the swivel angle (please state in clear text when ordering).

7 RE 9 07/.05 MA and EM Bosch Rexroth AG 7/6 Technical data EM/ Technical data general Size Control stroke (0 to V g max ) s mm 4, 7, 0,7 0,7 5,9 5,9,6 Adjustment time ) (min...max) t s Thread pitch on spindle h mm Number of spindle revolutions (0 to V g max ),84,4 4,4 4,4 5,8,59,6 Required torque on spindle T Nm 0 Max. permissible ambient temperature C 80 ) Table of adjustment times on page 9 Technical data electrical Electric motor Specifications and technical data on el. motor and reducing gear please request separately Nominal operating voltage U ) V 0 / 400 ~ Frequency ) Hz 50 Protection to DIN/EN 6059 IP 54 Limit switches 6x KS 50 connections Max. Voltage U V 50 Current (resistive load) A 4 Current (inductive load) 4 ) A 0,5 Protection to DIN/EN 6059 IP 65 Type of connection/protection to DIN/EN 6059 Burndy-Round plug pins / IP 67 Switch back difference (hysteresis) in % of displacement ca. % Lifetime (Number of switching operations) 0 x 0 6 Limit switches with wire potentiometer (on EM) 7 RA, turn, free rotatable, with and without center tapping Max. Voltage U V 50 Current (resistive load) A 4 Current (inductive load 4 ) A 0,5 Protection to DIN/EN 6059 IP 65 Type of connection/protection to DIN/EN 6059 Burndy-round plug pins / IP 67 Switch back difference (hysteresis) in % of displacement ca. % Resistance (referred to total electric drive range) Resistance referring to wiper range of see page kω 5 Resolution in % 0,09 Max. wiper current ma Power capacity at +40 C W Electrical turning range 55 ± 5 Lifetime (Number of switching operations) x 0 6 Hysteresis between pump and potentiometer 0 ) Special voltages on request ) Operation with 60 Hz also possible, thereby reduction of adjustment times of approx. 0 % 4 ) with inductive loads a protective diode is necessary

8 8/6 Bosch Rexroth AG MA and EM RE 9 07/.05 Characteristics EM/ A4VSO open circuit Please note: In variable displacements pumps A4VSO for open circuit (swivel to one side of center only) a residual displacement of approx. % is permanently set as V g min. s s max Interrelation between pump direction of rotation swivel range direction of flow Pump direction of rotation Swivel range ) Direction of flow Pressure side clockwise S to B B counter clockwise S to B B ) comp. swivel angle indicator V g V g max A4VSG and A4CSG closed circuit s s max V g V g max s s max + V g V g max Interrelation between pump direction of rotation swivel range direction of flow Pump direction of rotation Swivel range ) Direction of flow Pressure side clockwise B to A A A to B B counter clockwise A to B B ) comp. swivel angle indicator B to A A 5 0 5

9 RE 9 07/.05 MA and EM Bosch Rexroth AG 9/6 Table of adjustment times EM/ for swivel of 0 V g max, at operating pressure of 50 bar and 50 Hz electric motors (when operating at 60 Hz adjustment times are reduced by approx. 0 %) Size 40 Adjustment time 0 V g max t s Orderung code Size 7 Adjustment time 0 V g max t s Ordering code Size 5 Adjustment time 0 V g max t s Ordering code Size 80 Adjustment time 0 V g max t s Ordering code Size 50 Adjustment time 0 V g max t s Ordering code Size 55 Adjustment time 0 V g max t s Ordering code Size 500 Adjustment time 0 V g max t s Ordering code

10 0/6 Bosch Rexroth AG MA and EM RE 9 07/.05 Limit switches EM/ The standard adjustments are factory set as follows: In closed circuits (schematic see below) Limit switch switches at 5 Swivel range clockwise Limit switch switches at 0 Limit switch switches at 5 Swivel range counter clockwise Limit switch 4 switches at 0 Limit switch 5 switches at 0 Limit switch 6 switches at 0 In open circuits (swivel to one side only) the limit switch for 5 for the unused direction of swivel is factory set at 0 (Limit switch or ). Other switching points, deviating from these standard settings can be set by turning the adjustment screws at the cam discs. To do this, proceed as follows: Bring the pump to the desired swivel angle. Turn the appropriate cam disc adjustment screw till the limit switch actuates. Cable numbers to: 0,75 mm ground lead yellow/green: 0,75 mm 9 0 R = 0 Ω (Measured value) Potentiometer Ground yellow/green P N A C R B M L W Y S X Z T U D E K V G F J H BURNDY-round plug Limit switches Limit switch cam position Graduating dial with pointer position Swivel angle indicator of swash plate

11 RE 9 07/.05 MA and EM Bosch Rexroth AG /6 Potentiometer on EM EM features a potentiometer to give a feedback signal of the actual swivel angle position: Wire potentiometer type 7 RA turn, free rotatable, with a nominal resistance of 5kΩ. Standard setting: measured value between wiper and center tapping = 0 Ω Deviating settings can be accomlished by turning the gear below the potentiometer. This gear is conneted with the drive shaft via a safety coupling. The fine adjustment of the potentiometer is accomplished with the adjustment screw on the coupling between potentiometer and gear. Further technical data see page 7 and 0. Resistance values in kω referring to the wiper range of 0 to 5 swivel angle Sizes Resistance R kω,60,9,4,4,90,8,8 Nominal resistance of potentiometer R N kω 5

12 /6 Bosch Rexroth AG MA and EM RE 9 07/.05 Schematic EM/ (Example A4VSO) B B MB M Poti U S MS 4 K K T R(L) Sub-assemblies Pump with mechanical adjustment device A4VSO (see RE 9050), A4VSG (see RE 900) or A4CSG (see RE 905) Electric motor with protection to IP 54 For technical data on the electric motor and the reducing gear separate specifications are available, please request Limit switch, protection class IP 67 see page 7 and 0 4 Potentiometer (only on version EM) see page 7 and

13 Einschraubloch M RE 9 07/.05 MA and EM Bosch Rexroth AG /6 Unit dimensions EM/ Sizes Dimensions valid for A4VSO, A4VSG and A4CSG Before finalising your design please request a certified installation drawing. A7 A A A A4 with potentiometer for disassembly Burndyround plug pins R L (4) R(L) B S B A5 A6 without potentiometer for disassembly Sub-assemblies see page Unit dimensions (Maximum values, depending on the electric motor version, the dimensions can be a bit smaller) Size A A A A 4 A 5 A 6 A For detailed unit dimensions and technical data on the variable pumps see the technical data sheets A4VSO RE 9050, A4VSG RE 900 or A4CSG RE 905

14 Einschraubloch M 4/6 Bosch Rexroth AG MA and EM RE 9 07/.05 Unit dimensions EM/ Size 500 Dimensions valid for A4VSO, A4VSG and A4CSG Before finalising your design please request a certified installation drawing. 8 B with potentiometer for disassembly Burndyround plug pins R L (4) R(L) S B 4 84 without potentiometer for disassembly Sub-assemblies Pump with mechanical adjustment device A4VSO (see RE 9050), A4VSG see RE 900) or A4CSG (see RE 905) Electric motor, protection IP 54 For the electric motor and reducing gear separate specifications are available, please request Limit switch protection IP 67 see page 7 and 0 4 Potentiometer (only on version EM) see page 7 and Dimensions are max. values, depending on the electric motor version the dimensions can be a bit smaller. For detailed unit dimensions and technical data on the variable pumps see the technical data sheets A4VSO RE 9050, A4VSG RE 900 or A4CSG RE 905.

15 RE 9 07/.05 MA and EM Bosch Rexroth AG 5/6

16 6/6 Bosch Rexroth AG MA and EM RE 9 07/.05 General notes The adjustment devices MA and EM were designed for the respective pumps as follows: open circuit (A4VSO) or closed circuit (A4VSG, A4CSG). Project planning, assembly, and startup of the pumps require the involvement of trained personnel. The working and functional ports are only designed to accommodate hydraulic piping. Tightening torques: The tightening torques specified in this data sheet are maximum values and may not be exceeded (maximum values for screw thread). Manufacturer specifications for the max. permissible tightening torques of the used fittings must be observed! For DIN fastening screws we recommend checking the tightening torque individually according to VDI 0 Edition 00. The housing temperature rises during and shortly after operation. Take suitable safety precautions (e.g. wear protective clothing). The data and information contained herein must be adhered to. Bosch Rexroth AG Hydraulics Product Segment Axial Piston Units Plant Horb An den Kelterwiesen Horb a.n., Germany Telefon +49 (0) Telefax +49 (0) info.brm-ak@boschrexroth.de This document, as well as the data, specifications and other informations set forth in it, are the exclusive property of Bosch Rexroth AG. Without their consent it may not be reproduced or given to third parties. 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 judgement and verification. It must be remembered that our products are subject to a natural process of wear and aging. Subject to change.