Load sensing control block in mono and sandwich plate ... · Load sensing control block in mono and...

Load sensing control block in mono and sandwich plate design

Model ML-18

RA 64950, edition: 12.2014, Bosch Rexroth Corp.

Overview of contents

Content Page Features 1Functional description / cross-section 2Technical data 3Ordering code 4Order examples 8Directional valve elements 9Port options 10Unit dimensions 11 Directional valve elements Pressure Compensator Main SpoolFlowTypes of operation Voltage supply and plugs Secondary valves

System ▶ Load sensing pressure compensated valves

– Closed center for variable displacement pump – Float position function in the mono-block – Regenerative position function in the mono-block

Type ▶ Mono-block

– Inlet: 3 axes block – End Plate (optional) – Expandable via maximum 9 sandwich plates

Types of operation ▶ Hydraulic ▶ Electro hydraulic (proportional, on/off)

Pressure ▶ Inlet Relief

– Pilot Operated Relief Valve ▶ Direction valve element / actuator ports

– Pilot Operated Relief Valve – Anti-Cav Valve

Flow ▶ Load pressure compensated ▶ High repeatability ▶ Low hysteresis

RA 64950Edition: 12.2014

▶ Component series 1X ▶ Nominal pressure 4050 psi (280 bar) – pump side ▶ Nominal pressure 4500 psi (310 bar) – actuator side ▶ Nominal flow 80 gpm (300 l/min) – inlet ▶ Nominal flow 44 gpm (165 l/min) – section #1 only ▶ Nominal flow 40 gpm (150 l/min) – section #2 & #3 ▶ Nominal flow 42 gpm (160 l/min) – expandable sections

2

Bosch Rexroth Corp., RA 64950, edition: 12.2014

ML-18 | Load sensing control block in mono and sandwich plate designFunctional Description

▼ Cross-section

T1

Y1LS1

X1P1

b

a

A1 B1 A2 B2 B3

a

b

A3

2.0 bar

0.3 bar

T2

LSz Y2 X2

P2

b

a

Mb Ma

A4 B4

Section 1 Section 2 Section 3 Section 4Endplate

PG E2

T

Y

LS

X

P

T

Y

LS

X

P

b

a

1 Housing [Body] 2 Main Spool 3 Pressure Compensator Spool 4.1 Secondary Relief Valve, Port A4.2 Secondary Relief Valve, Port B5.1 Pressure Reducing Valve (pilot valve “a”)5.2 Pressure Reducing Valve (pilot valve “b”)6 Main Spool, Centering Spring

A B4.1

5.2

"b"

"a"

5.1 6

2

1 3

4.2

Functional Description

The ML-18 is a 3 axes mono-block load sensing, pressure compensated valve. It has the ability to add addition M4-15 -2x valves slices to the ML-18 mono-block. The ML-18 con-trols the volume, direction of oil flow and maintains a constant flow regardless of changing load pressures.

An advantage of the ML-18 is that the starting point for movement of the function always remains the same, i.e., a specified control spool position always has the same meter-ing characteristics. This is accomplished by the compensat-ing spool in each section.

While the main spool is in the neutral position, the Load Sense signal network is vented to tank. When the main spool is biased, the load pressure is directed to the spring end of the pressure compensator spool, the section com-pensator now moves to the open position. Dependent on the pressure drop between the section compensator and the control spool opening, a specific volume now flows to the function. The load signal also simultaneously communi-cates to the shuttle and on to the system compensating device. The system compensating device can be a variable displacement pump system.

3


Load sensing control block in mono and sandwich plate design | ML-18Technical data

General

Installation Position Any

Type of connection SAE J1626 / ISO 11926-1

Hydraulic fluid and ambient temperature range

°F°C

–4 to +176–20 to +80

Hydraulic

Max. flow at port P qvmax gpm (l/min) 80 (300)

A, B qvmax gpm (l/min) 44 (165) [section #1]

40 (150) [section #2 or #3]

42 (160) [expandable sections]

Max. operatingPressure at port

P pmax psi (bar) 4050 (280)

A, B pmax psi (bar) 4500 (310)

T pmax psi (bar) Consult factory

Y pmax psi (bar) Depressurized to the tank

Max. pilot pressureat port

X pctrl psi (bar) 500 (35)

a, b pctrl psi (bar) 375 (26)

Pilot Pressure range Hydraulic pctrl psi (bar) Consult factory

Electrohydraulic pctrl psi (bar) Consult factory

Min. pump margin pmin psi (bar) 220 (15)

Hydraulic fluid Mineral oil (HL, HLP) according to DIN 51524, other hydraulic fluids, such as HEES (synthetic esters) according to VDMA 24568 as well as hydraulic fluids as specified under RE 90221, at request

Viscosity range v SUS (mm2/s) 46 to 1760 (10 to 380)

Maximum permitted degree of contamination of the hydraulic fluid cleanliness class according to ISO 4406

Class 20/18/15

Electrical

Type of voltage Direct voltage

Nominal voltage of the amplifi-er

V 12 24

Maximum control current A 1.5 0.75

Coil resistance (20 °C) Ω 4.7 20.8

Duty cycle (with amplifier) % 100

Protection class according to DIN 40050-9

– Solenoid IP 69K

– Electric connection K40 IP 69K

PWM frequency (recommend-ed) 1)

100

1) The PWM frequency is to be optimized depending on the application. In this regard, observe the temperature range of the application.

Technical data (Please inquire in case the intended use of unit is outside the given values!)

4


ML-18 | Load sensing control block in mono and sandwich plate designOrdering code

Ordering code

01 Total number of spool axes [3 to 12 axes possible]

02 ML-18 load sensing control block

Component Series03 10

Inlet Type

04 Closed Center J

Primary Pressure Limitation

05Without primary pressure relief valve, plugged Q

With primary pressure relief valve, (in bar, 3-digit) …

Back Pressure Check Valve

07

6.5 BAR back pressure B

2.0 BAR back pressure check w/replenish feature BE

Without [plugged] Q

Load Sense Dampening

08Without dampening 00

With: 0.25 25

Load Sense Pressure Limitation

09

Electronic (Spool axis #1 only) Increasing characteristic, {ref to data sheets RE 18139-04} A

Electronic (Spool axis #1 only) Decreasing characteristic, {ref to data sheets RE 18139-05} B

All spool axis D

All spool axis except #1 E

Machined, Plugged Q

Not Machined Z

Load Sense Pressure Setting {required for options A, B, D, & E}

10

150 Bar {for option A or B} H

210 Bar {for option A or B} L

250 Bar {for option A or B} N

Pressure Setting in Bar {for option D or E} …

Supply Voltage {required for options A or B}

1124 Volt, Deutsch Connector 8


01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

ML-18 -1X J Spool Axis #1

Spool Axis #2

Spool Axis #3

5


Load sensing control block in mono and sandwich plate design | ML-18 Ordering code

Ordering code

Pressure Compensator

12 Pressure compensator, with load holding function S

Spool Symbol

13

Cylinder E

Motor J

3-position Regeneration R3

4-position Regeneration R4

4-position Float W

Work Port Flow [L/min]

14Work Port A flow - Work Port B flow e.g. 080-080 For Craning feature, add Cr prefix to flow e.g. 080-Cr 080………….not available with J spool

…-…

Spool Actuation

15

Hydraulic Actuation H

Electrical Proportional Actuation W2

Electrical On/Off Actuation W4

Supply Voltage {required for options W2 or W4}



Secondary Valves

17 & 18

Pressure relief/anti-cavitation valve, adjustable H …

Anti-cavitation valve E

Plug Screw (secondary valves can be retrofitted) Q

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18

ML-18 -1X J Spool Axis #1

Spool Axis #2

Spool Axis #3

6


ML-18 | Load sensing control block in mono and sandwich plate designOrdering code

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

MSpool Axis #4

Spool Axis #5

NOTE: Maximum of up to 9 sections.

M4-15, Pressure Compensator

19

Pressure compensator, with load holding function S

Pressure compensator, without load-holding function T

without pressure compensator, with load-holding function C

Load Sense Valve 18 19 20

2022

Without LS-RV machining (LS-RV can not be retrofitted) (M not possible) Z Z

With LS-RV plug screw (Z not possible) Q Q

With LS pressure relief Valve, (pressure setting in bar, 3 digit) (Z not possible) … …

With LS unloading plug B B

21Housing without measuring ports Z

Housing with measuring ports M

Spool Symbol

23

E-spool (Cylinder) E

J-spool (Motor) J

Q-spool (A&B vented to tank in neutral) Q

Spool with regeneration function R

Float spool W

Work Port Flow (L/min)

24 Work Port A flow - Work Port B flow e.g. 080-080 …-…

Spool Actuation

25

Hydraulic Actuation H

Electrical Proportional Actuation W2

Electrical On/Off Actuation W4

Supply Voltage (required for options W2 or W4)



Operation, B side cover

27

Standard Cover —

Hand lever following, handle up K

Hand lever following, handle straight out L

Hand lever following, handle down M

Hand lever following, No Handle R

Ordering code

7


Load sensing control block in mono and sandwich plate design | ML-18Ordering code

Secondary Valves

28 & 29

Pressure relief/anti-cavitation valve, adjustable H …

Anti-cavitation valve E

Plug Screw (secondary valves can be retrofitted) Q

End Elements

30

End cover, with internal LS unloading LA

End cover with LS port, without internal LS unloading LZ

End cover, with internal LS unloading, w/ pilot oil supply LAY

End cover, with internal LS unloading, w/ pilot oil supply & ports P & T LAYPT

End Cover with LS port, without internal LS unloading, with pilot oil supply LZY

Seals

31 NBR M

Porting

32 Reference page 10 19

33 Further details in clear text

Ordering code

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

MSpool Axis #4

Spool Axis #5

NOTE: Maximum of up to 9 sections.

8


ML-18 | Load sensing control block in mono and sandwich plate designOrder example

Order example

01 02 03 04 05 06 07 08 09 10 11

Mon

o bl

ock

4 ML-18 -1X J 250 Z BE 25 E 200 –

– Total of 4 spool Axis's– Primary Pressure Relief valve, set t0 250 bar– 2.0 BAR bacl pressure check with replenish feature– Load Sense Damping– Load Sense Relief Valve, set to 200 BAR, limits all spool axis's except Axis #1

12 13 14 15 16 17 18S E 165 – 165 W2 9 H280 H280

– Pressure compensator, with load holding function– Cylinder Spool, "E", cylinder port flow, 165 L/min, A port & B Port– Electrical Porportional Actuation, 2 volt with Deutsch connectors– Pressure Relief/Anti-cavitation valves for actuation ports "A" & "B", set to 280 BAR

S W 150 – 150 W2 9 H220 H220

– Pressure compensator, with load holding function– 4 position Float Spool, "W", cylinder port flow, 150 L/min, A port & B Port– Electrical Porportional Actuation, 2 volt with Deutsch connectors– Pressure Relief/Anti-cavitation valves for actuation ports "A" & "B", set to 220 BAR

S E 165 – 165 W2 9 H220 H220

– Pressure compensator, with load holding function– Cylinder Spool, "E", cylinder port flow, 150 L/min, A port & B Port– Electrical Porportional Actuation, 2 volt with Deutsch connectors– Pressure Relief/Anti-cavitation valves for actuation ports "A" & "B", set to 220 BAR

19 20 21 22 23 24 25 26 27 28 294th spool axis S 180 M 180 E 100 - 100 W2 9 – H200 H200

– Pressure compensator, with load holding function– Load Sense Relief Valves, set to 180 BAR, Limits pressure to ports "A" & "B"– Cylinder Spool, "E", cylinder port flow, 100 L/min, A port & B Port– Electrical Porportional Actuation, 2 volt with Deutsch connectors– Pressure Relief/Anti-cavitation valves for actuation ports "A" & "B", set to 200 BAR

30 31 32 33End Cover LAYPT M 19

– End Cover with internal LS unloading, with a pilot oil supply, and P2 & T2 ports– NBR seals– SAE porting

T1

Y1LS1

X1P1

b

a

A1 B1 A2 B2 B3

a

b

A3

2.0 bar

0.3 bar

T2

LSz

Y2 X2

P2

b

a

Mb Ma

A4 B4

Section 1 Section 2 Section 3 Section 4Endplate

PG E2

T

Y

LS

X

P

T

Y

LS

X

P

b

a

9


Load sensing control block in mono and sandwich plate design | ML-18

Directional valve elements: Pressure compensator

When the main spool is in the neutral position, there is no connection from P to work ports A and B. In this condi-tion, the compensator spool [1] will be modulating to maintain the equiv- alent spring force pressure up to the main spool.

When the main spool [3] is biased to a power position, P-B, A-T, the LS pressure is con-nected to the compensator spool spring chamber. [4] The flow directed out Work Port B will be kept constant even if there is fluctuation in supply pressure P.

A

1

P

B

A

4

T

3

B

P

10


ML-18 | Load sensing control block in mono and sandwich plate design

Port sizes

ML-18 Monoblock

P1SAE J518

1" Code 61 - Flange

T1

SAE J1926-1

SAE-16 Port

1 5/16-12 UN Thd.

A1, B1, B2, B3

SAE J1926-1

SAE-16 Port

1 5/16-12 UN Thd.

A2, A3

SAE J1926-1

SAE-12 Port

1 1/16-12 UN Thd.

LS1, PG, X1, Y1

SAE J1926-1

SAE-6 Port

9/16-18 UNF Thd.

Additional Sections

Ax & Bx

SAE J1926-1

SAE-12 Port

1 1/16-12 UN Thd.

MAMB

SAE J1926-1

SAE-4 Port

7/16-20 UNF Thd.

End Cover

P2T2

SAE J1926-1

SAE-12 Port

1 1/16-12 UN Thd.

LS SAE J1926-1

X2 SAE-6 Port

Y2 9/16-18 UNf Thd.

P1 = Pump Supply PortPG = Measuring Port: Pump SupplyT1 = Tank PortA1 = Section 1, Work Port AB1 = Section 1, Work Port BA2 = Section 2, Work Port AB2 = Section 2, Work Port BA3 = Section 3, Work Port AB3 = Section 3, Work Port BX1 = Pilot Oil Supply PortX2 = Pilot Oil Supply PortLS1 = Load Sense PortLSZ = Option LS Carryover portY1 = Solenoid Drain PortY2 = Solenoid Drain PortE2 = Measuring Port for B2Ax = Work Port A, additional sectionsBx = Work Port B, additional sectionsMA = Load Sense measuring Port AMB = Load Sense measuring Port B

11


Load sensing control block in mono and sandwich plate design | ML-18Port options

42.5 73

120

174.5

255

258.5

74.5

210.5

24.446.5

61.5

141.5114.5

174.1

47

92118.3

147.5

71.5

13.5

29.1

23.110

6.6

100.6

161.1

155.1

25329

8.5 308.5

44.579.5

44.2530

82.593.5

48.5118.5

3511

2

A1

B1

LS1 PGB2

A2

B3A3

A4

B4X1

A1

B1

A2

B2

A3

B3

8X DEUTSCH CONNECTOR DT04-2P

A4B4

Y2T2

P2

X2

48.6126.5

183.1260.6104.5

33

6459.6

155.1

P1

T1

Y1

3/8-16 UNC-2BTHD. 17 MIN

5034

5.5

Unit dimensions

Bosch Rexroth Corp.Hydraulics2315 City Line RoadBethlehem, PA 18017U.S.A.Telephone (800) REXROTH (800) 739-7684 [email protected] www.boschrexroth-us.com

© All rights reserved Bosch Rexroth Corp. This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth Corp. It may notbe reproduced or given to third parties with 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.

12


ML-18 | Load sensing control block in mono and sandwich plate designUnit dimensions

Load sensing control block in mono and sandwich plate ... · Load sensing control block in mono and...

Documents

Transcript of Load sensing control block in mono and sandwich plate ... · Load sensing control block in mono and...