Open center control block in monoblock design MO-40

Transcription

1 Open center control block in monoblock design MO-40 RE Edition: Replaces: Size 40 Series 1X Maximum working pressure on pump side 350 bar on consumer side 420 bar Maximum flow 680 l/min 4MO-40 Features Valve control in accordance with the 6/3-way principle Large fine control range for flow control with progressiveflow characteristic High pressure carry-over feature for downstream consumers when using C port (separation of by-pass line from tank line) Low internal leakage due to fitted main spool Main spool with automatic air bleed possible Contents Functional description 2 echnical data 5 Ordering code 6 Characteristic curves 8 Dimensions 9 Related documents 12 Design Monoblock with 1, 3 or 4 consumer axes ype of actuation Hydraulic Electrohydraulic ressure limitation rimary pressure relief valve in the supply line Secondary pressure relief valves/anti-cavitation valves in stacking element design. Fields of application Mining excavators Drilling rigs Cranes RE 64370/ , osch Rexroth G

2 2 MO-40 Control block Functional description Functional description High pressure mobile control blocks, type MO-40 are directional control valves in monoblock design. hey provide fine control of the speed and flow direction. he valves are optionally operated hydraulically or electrohydraulically. he control blocks of type MO-40 consist mainly of the housing (1), the main spool (2), load holding valve (3), the operating element (4), the return springs (5), mounted feed valves (6) (optional) and mounted secondary pressure relief valves (7) (optional). he 6/3-way valves combine the function of a 4/3-way valve and a 2/2-way valve. In non-actuated state, the main spool (2) is kept in the initial position by the return springs (5). In this position, the connection from the pump to the consumer is closed, the 2/2-way part is open and allows fluid to flow without pressure from to (free circulation). If the main spool (2) is moved out of its initial position, the connection from the pump to the consumer is opened via metering notches. he pump pressure increases. When the pressure at the consumer port is reached, the load holding valve (3) opens and the hydraulic fluid begins to flow to the consumer. s the main spool (2) continues its movement, the opening to the tank takes place via metering notches for the hydraulic fluid coming from the consumer and the flow is gradually fed from the 2/2-way line to the consumer channel (fine control). Control characteristics, operating forces Uniform quality of the control characteristics and low operating forces are achieved through optimum design of the metering edges in the housing, favorable shape of the metering notches and fitting of the main spool with constant clearance. ressure setting of the primary and secondary valves he specified pressure values are set as follows: direct operated pressure valves at a flow of 2 to 3 l/min pilot operated pressure valves at a flow of 10 l/min. Circuit types Number of spool axes Size ossible circuit type 1 Ordering code MO-40 1 //2//3// //3 4 L 4 1//2//3 4 M // = parallel circuit = tandem circuit On the 3-spool control block, the load holding valves (3) are always integrated in the main spool. With the 1-spool and 4-spool version, the load holding valves (3) are located in the housing (1). Spool stroke he spool stroke is divided into approx. 30 % control land overlap and 50 % fine control range, while the remaining stroke serves to create the full opening. he overlap and a low spool tolerance serve to reduce internal leakage. Due to the large fine control range, the consumers can be sensitively controlled. osch Rexroth G, RE 64370/

3 Control block MO-40 Functional description 3 Cross section (example) 1 Housing 2 Main spool 3 Load holding valve (see symbol) 4 Operating element 5 Return springs 6 Feed valve 7 Secondary pressure relief valve (optional) 8 rimary pressure relief valve (see symbol) C Version R (standard) ort consumer side (only when no port C is required). Version C y-pass channel is separated from the tank line. Symbol example for a 1-spool block, hydraulic actuation With version R, the circulation and return go into a tank a b With version C, the tank line is separated from the by-pass channel C 4 4 RE 64370/ , osch Rexroth G

4 4 MO-40 Control block Functional description Symbol 4MO-40 in parallel circuit (1//2//3//4) Symbol 4MO-40 in mixed circuit (1//2//3//4) a4 b4 a4 b a3 b3 a3 b a2 b2 a2 b a1 b1 a1 b1 M Symbol 3MO-40 in tandem circuit (1 2 3) 3 3 a3 b3 On versions with a tandem circuit, the pump channel is blocked to the next spool axis if the free circulation is closed when an upstream main spool is actuated. Main spool with flushing grooves (on request) 2 2 a2 b2 1 1 a1 b1 osch Rexroth G, RE 64370/

5 Control block MO-40 echnical data 5 echnical data General Weight with secondary valves Electrohydraulically operated kg approx. 487 (4-spool control block) Installation position ny Line connections SE flange port according to ISO 6162 mbient temperature range C 20 to +80 riming One-coat paint RL 5010 Hydraulic Maximum working pressure, C, X p bar 350 at port, p bar 420 p bar 30 L p bar 0 Maximum pilot pressure at st p bar 30 (higher pressures on request) port a, b p bar 30 (higher pressures on request) Maximum flow l/min 680 Hydraulic fluid Mineral oil (HL, HL) according to DIN 51524, other hydraulic fluids, e.g. HEES (Synthetic ester) according to VDM and hydraulic fluids as specified in data sheet 90221, on request Hydraulic fluid temperature range ϑ C -20 to +80 Viscosity range ν mm 2 /s 10 to 380 Maximum admissible degree of contamination of the hydraulic fluid, Cleanliness level according to ISO 4406 (c) Recommended hydraulic pilot controls 2H6 see data sheet Class 20/18/15, we recommend a filter with a minimum retention rate of β H5/6 see data sheet Control curve no. 06 } H7 see data sheet Note lease contact us if the unit is to be used outside the specified range of values. he technical data was determined with a viscosity range of ν = 41 mm 2 /s and a temperature of θ = 50 C. RE 64370/ , osch Rexroth G

6 6 MO-40 Control block Ordering code Ordering code Short type Spool axis dditional information MO 40 1X / 1st spool axis 2nd spool axis 3rd spool axis th spool axis / * Short type 01 Number of spool axes 1, 3 or 4 02 Series control block MO MO 03 Size Series 10 to 19 (unchanged installation and connection dimensions) 1X rimary pressure limitation 1) 05 Without Q Circuit type ressure relief valve, pilot operated (MHDV, see data sheet 64642) ressure/anti-cavitation valve with pressure sequencing stage (MHDH, see data sheet 64642) ressure/anti-cavitation valve with pressure cut-off stage (MHDM, see data sheet 64642) 06 Number of spool axes ossible circuit type V 000 L 1 1 andem circuit andem circuit 4 1 //2//3//4 arallel circuit 4 1 2//3 4 Mixed circuit L 4 1//2//3 4 arallel circuit, final axis in tandem circuit M // = parallel circuit = tandem circuit Spool type ) ressure information for pressure limitation and pressure sequencing/cut-off stage in bar, 3-digit osch Rexroth G, RE 64370/

7 Control block MO-40 Ordering code 7 ype of actuation 08 Hydraulic H Electrohydraulic proportional W2 Electrohydraulic switchable W4 Secondary valves for - and -side 1) 09 Without 10 ressure relief valve, pilot operated size 22 ressure relief valve, pilot operated size 22 + anti-cavitation valve size 22 ressure relief valve, direct operated size 22 ressure relief valve, direct operated size 22 + anti-cavitation valve size 22 Feed valve size 22 Cover plate for secondary valve mounting face size 22 Z C F R S U ank port 11 With tank port R With tank port and pressure carry over port C for downstream consumers (not possible for tank port on consumer side, ordering code V) C Line connections 12 SE flange port according to ISO ump port position 13 ump port on secondary valve side S ump port on consumer port side V ank port position 14 ank port on secondary valve side S ank port on consumer port side (not possible with version C) V Installation position (standard) 15 Designation of installation position from horizontal. his determines the position of the air bleed Sealing material 16 FKM (fluoroelastomer) V NR (nitrile-rubber) M Optional 17 Flushing grooves in the main spool S 18 Further specifications in plain text * 2) If two valves R or are mounted per consumer port, the code letters + pressure setting are listed twice in the ordering code. ressure information in bar, 3-digit RE 64370/ , osch Rexroth G

8 8 MO-40 Control block Characteristic curves Characteristic curves Δp q V - Flow characteristic curve in mid position, free by-pass) 10 ressure difference [bar] Flow [l/min] Δp q V - Flow characteristic curves,, 10 Symbol 001 ressure difference [bar] /4 1/1 1/ / Flow [l/min] Note Characteristic curves measured at ν = 41 mm²/s and θ = 50 C). osch Rexroth G, RE 64370/

9 Dimensions [mm] Control block MO-40 Dimensions 9 Dimensions Line connections SE flange ports according to ISO 6162 orts ump DN 38 (SE 1 1/2 in 6000 SI) ank DN 64 (SE 2 1/2 in 3000 SI), Consumer DN 38 (SE 1 1/2 in 6000 SI) a, b ilot oil G 3/8 C ump pressure transfer DN 38 (SE 1 1/2 in 6000 SI) 1MO C b ± a ± Name plate 2 hree fastening threads M16, 25 deep RE 64370/ , osch Rexroth G

10 10 MO-40 Control block Characteristic curves Dimensions [mm] 3MO ± a3 b ± ~ a2 a b2 b ± Name plate 2 hree fastening threads M20, 30 deep 3 ttachment point osch Rexroth G, RE 64370/

11 Dimensions [mm] Control block MO-40 Characteristic curves 11 4MO b4 a4 b3 3 b2 b a3 a2 a ± ± Name plate 2 hree fastening holes Ø 18 3 ttachment point RE 64370/ , osch Rexroth G

12 12 MO-40 Control block Related documents Related documents he MO-40 control blocks are system components. Observe the instructions for the other system components. Only commission the product if the following documentation is available to you and you have understood and observed it. itle Document number Document type Control blocks for mobile applications Instruction manual System documentation from the machine manufacturer Instruction manual osch Rexroth G Mobile pplications Zum Eisengießer Lohr am Main, Germany el [email protected] 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 this 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 64370/