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UNIWRAP
Technical Systems
Hydraulic System
TIC |
UNIWRAP |
Hydraulic System |
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Contents
1 |
Hydraulic circuit diagram |
................................................5 |
2 |
Pre-conditions for use................................................... |
27 |
3 |
Valve block ..................................................................... |
31 |
4 |
Individual components .................................................. |
41 |
11/04 |
UNI-h |
3 |
Hydraulic System |
UNIWRAP |
TIC |
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4 |
UNI-h |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
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1
Hydraulic circuit diagram
1.1 Hydraulic circuit diagram up to serial no.: 72600130 ........................ |
8 |
1.2Hydraulic circuit diagram from machine no.: 72600131,
with tipping cradle service shut-off valve (631) ............................... |
12 |
1.3Hydraulic circuit diagram from machine no.: 72600531,
with film clamping cutters flow divider (769).................................... |
16 |
1.4Hydraulic circuit diagram from serial no.: 72601047,
with valve combination (630, 706, 769), |
|
without 3-stage restrictor (645) ....................................................... |
20 |
1.5Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769),
with 3-stage restrictor (645) ............................................................ |
24 |
11/04 |
UNI-h-Kap1 |
5 |
Hydraulic System |
UNIWRAP |
TIC |
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6 |
UNI-h-Kap1 |
11/04 |
1.1
Hydraulic circuit diagram
- up to serial no.: 72600130
Hydraulic System |
UNIWRAP |
TIC |
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1.1Hydraulic circuit diagram up to serial no.: 72600130
Key to diagram: |
1 |
Feed line |
|
2 |
Return line |
|
3 |
Valve block |
|
3a |
Plate |
|
4 |
Valve block |
|
5 |
Valve block |
|
6 |
Disc brake |
|
234 |
Wrapping arm motor |
|
235 |
Wrapping table motor |
|
374 |
Film clamping cutters hydraulic cylinder |
|
375 |
Tipping cradle hydraulic cylinder |
|
376 |
Wrapping table hydraulic cylinder |
|
406 |
Orifice plate Ø 0.8 mm |
|
410 |
Orifice plate Ø 1.5 mm |
|
630 |
Wrapping table flow control valve |
|
706 |
Pressure relief valve |
|
732-1 |
Non-return valve |
|
732-2 |
Non-return valve |
|
732-3 |
Non-return valve |
|
732-4 |
Non-return valve |
|
734 |
Lock-up valve unit |
|
763 |
Input pressure balance |
|
764 |
Pressure relief valve (left) 115+10 bar |
|
765 |
Pressure relief valve (right) 115+10 bar |
|
766 |
Lower brake valve |
|
767 |
Wrapping arm motor flow controller |
|
768 |
LS signal shuttle valves |
|
Y77 |
Master valve solenoid valve |
|
Y133 |
Wrapping arm motor forward solenoid valve |
|
Y134 |
Wrapping arm motor reverse solenoid valve |
|
Y135 |
Lower tipping cradle solenoid valve |
|
Y136 |
Raise tipping cradle solenoid valve |
|
Y137 |
Lower wrapping table solenoid valve |
|
Y138 |
Raise wrapping table solenoid valve |
|
Y139 |
Open film cutters solenoid valve |
|
Y140 |
Close film cutters solenoid valve |
8 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
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Description of function: |
|
|
Orifice plate (406) |
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and |
|
Ø 0.8 mm |
consequently uncontrolled movements of the wrapping arm motor (234). |
|
Wrapping table flow control |
The wrapping table flow control valve supplies the hydraulic motor (235) |
|
valve (630) |
via output (A). |
|
|
This volume flow can be adjusted and changes the wrapping table motor / |
|
|
wrapping arm motor speed ratio and consequently the film layer overlaps. |
|
Pressure relief valve (706) |
The pressure relief valve limits the pressure to 70 bar when lowering the |
|
|
tipping cradle hydraulic cylinders. |
|
Non-return valve (732-3) |
The non-return valve avoids faulty functions of the film clamping cutters |
|
|
by building up pressure in the T line. |
|
Input pressure balance |
The input pressure balance keeps the connection from P to T open when |
|
(763) |
no control unit is actuated in valve block 3. |
|
|
It is closed by LS pressure. The LS pressure is built up when the master |
|
|
valve (Y77-2) or a control unit in valve block 3 is actuated. |
|
Pressure relief valve (764) |
The pressure relief valve limits the oil pressure to the wrapping arm motor |
|
|
(234) and the wrapping table motor (drive) connected in series to |
|
|
115+10 bar. |
|
Pressure relief valve (765) |
The pressure relief valve limits the oil pressure of the wrapping arm motor |
|
|
(234) to 115+10 bar when decelerating. |
|
Lower brake valve (766) |
The non-return valves 732-1/ 732-2 and the lower brake valve (766) |
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|
decelerate the wrapping arm motor (234) hydraulically on both sides if the |
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wrapping arm forward solenoid valve (Y133) is not energized. |
|
Wrapping arm motor flow |
The flow controller keeps the volume flow to the wrapping arm motor |
|
controller (767) |
(234) constant. |
|
|
Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm |
|
|
motor. |
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|
Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm |
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|
motor. |
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LS signal shuttle valves |
When operating the control valves in parallel mode, the shuttle valves |
|
(768) |
allow sending the highest load pressure to the input pressure balance |
|
|
(763) in each case. |
|
Master valve solenoid valve |
The master valve solenoid valve is actuated automatically when a |
|
(Y77) |
hydraulic function is to be carried out on the baler. |
|
|
Now the pump flow is directed into the LS line so that the pressure that |
|
|
builds up closes the pressure balance (763). |
|
11/04 |
UNI-h-Kap1 |
9 |
Hydraulic System |
UNIWRAP |
TIC |
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Description of function: |
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Wrapping arm forward |
The solenoid valve controls the wrapping arm hydraulic motor. |
|
solenoid valve (Y133) |
A wrapping arm motor flow controller 767 is provided in the volume flow |
|
|
input and keeps the volume flow constant. |
|
|
When the control unit is activated, this volume flow is pumped to the |
|
|
hydraulic motor (234) which drives the wrapping arm with 28 ... 30 rpm |
|
|
max. The flow controller may be accessed via the screw plug at the |
|
|
bottom of the control unit. |
|
|
The rotational speed of the wrapping arm of 27 rpm ensures that the |
|
|
wrapping process is shorter than the time required for producing the bale. |
|
Wrapping arm reverse |
The solenoid valve changes the direction of oil flow to the wrapping arm |
|
solenoid valve (Y134) |
motor (234) and consequently its sense of rotation. |
|
Lower tipping cradle |
The solenoid valve lowers the tipping cradle. |
|
solenoid valve (Y135) |
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Raise tipping cradle |
The solenoid valve raises the tipping cradle. The lock-up valve unit 734 |
|
solenoid valve (Y136) |
avoids lowering of the raised tipping cradle. |
|
Lower wrapping table |
The solenoid valve lowers the wrapping table. The lock-up valve unit 734 |
|
solenoid valve (Y137) |
in the cylinder line avoids lowering of the loaded wrapping table. |
|
Raise wrapping table |
The solenoid valve raises the wrapping table. |
|
solenoid valve (Y138) |
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Open film cutters solenoid |
The solenoid valve opens both film cutters. |
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valve (Y139) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
Close film cutters solenoid |
The solenoid valve closes both film cutters. |
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valve (Y140) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
10 |
UNI-h-Kap1 |
11/04 |
1.2
Hydraulic circuit diagram
-from machine no.: 72600131
-with tipping cradle service shut-off valve (631)
Hydraulic System |
UNIWRAP |
TIC |
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1.2Hydraulic circuit diagram from machine no.: 72600131, with tipping cradle service shut-off valve (631)
Key to diagram:: |
1 |
Feed line |
|
2 |
Return line |
|
3 |
Valve block |
|
3a |
Plate |
|
4 |
Clamping cutters valve block |
|
5 |
Wrapping arm motor valve block |
|
6 |
Disc brake |
|
234 |
Wrapping arm motor |
|
235 |
Wrapping table motor |
|
374 |
Film clamping cutters hydraulic cylinder |
|
375 |
Tipping cradle hydraulic cylinder |
|
376 |
Wrapping table hydraulic cylinder |
|
406 |
Orifice plate Ø 0.8 mm |
|
410 |
Orifice plate Ø 1.5 mm |
|
630 |
Wrapping table flow control valve |
|
631 |
Tipping cradle shut-off valve |
|
706 |
Pressure relief valve |
|
732-1 |
Non-return valve |
|
732-2 |
Non-return valve |
|
732-3 |
Non-return valve |
|
732-4 |
Non-return valve |
|
734 |
Lock-up valve unit |
|
763 |
Input pressure balance |
|
764 |
Pressure relief valve (left) 115+10 bar |
|
765 |
Pressure relief valve (right) 115+10 bar |
|
766 |
Lower brake valve |
|
767 |
Wrapping arm motor flow controller |
|
768 |
LS signal shuttle valves |
|
Y77 |
Master valve solenoid valve |
|
Y133 |
Wrapping arm motor forward solenoid valve |
|
Y134 |
Wrapping arm motor reverse solenoid valve |
|
Y135 |
Lower tipping cradle solenoid valve |
|
Y136 |
Raise tipping cradle solenoid valve |
|
Y137 |
Lower wrapping table solenoid valve |
|
Y138 |
Raise wrapping table solenoid valve |
|
Y139 |
Open film cutters solenoid valve |
|
Y140 |
Close film cutters solenoid valve |
12 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
Description of function: |
|
|
Orifice plate (406) |
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and |
|
Ø 0.8 mm |
consequently uncontrolled movements of the wrapping arm motor (234). |
|
Wrapping table flow control |
The wrapping table flow control valve supplies the hydraulic motor (235) |
|
valve (630) |
via output (A). |
|
|
This volume flow can be adjusted and changes the wrapping table motor / |
|
|
wrapping arm motor speed ratio and consequently the film layer overlaps. |
|
Tipping cradle shut-off valve |
During service work, the tipping cradle shut-off valve shuts off the oil flow |
|
(631) |
from the hydraulic cylinders 375. |
|
Pressure relief valve (706) |
The pressure relief valve limits the pressure to 70 bar when lowering the |
|
|
tipping cradle hydraulic cylinders. |
|
Non-return valve (732-3) |
The non-return valve avoids faulty functions of the film clamping cutters |
|
|
by building up pressure in the T line. |
|
Input pressure balance |
The input pressure balance keeps the connection from P to T open when |
|
(763) |
no control unit is actuated in valve block 3. |
|
|
It is closed by LS pressure. The LS pressure is built up when the master |
|
|
valve (Y77-2) or a control unit in valve block 3 is actuated. |
|
Pressure relief valve (764) |
The pressure relief valve limits the oil pressure to the wrapping arm motor |
|
|
(234) and the wrapping table motor (drive) connected in series to |
|
|
115+10 bar. |
|
Pressure relief valve (765) |
The pressure relief valve limits the oil pressure of the wrapping arm motor |
|
|
(234) to 115+10 bar when decelerating. |
|
Lower brake valve (766) |
The non-return valves 732-1/ 732-2 and the lower brake valve (766) |
|
|
decelerate the wrapping arm motor (234) hydraulically on both sides if the |
|
|
wrapping arm forward solenoid valve (Y133) is not energized. |
|
Wrapping arm motor flow |
The flow controller keeps the volume flow to the wrapping arm motor |
|
controller (767) |
(234) constant. |
|
|
Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm |
|
|
motor. |
|
|
Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm |
|
|
motor. |
|
LS signal shuttle valves |
When operating the control valves in parallel mode, the shuttle valves |
|
(768) |
allow sending the highest load pressure to the input pressure balance |
|
|
(763) in each case. |
|
Master valve solenoid valve |
The master valve solenoid valve is actuated automatically when a |
|
(Y77) |
hydraulic function is to be carried out on the baler. |
|
|
Now the pump flow is directed into the LS line so that the pressure that |
|
|
builds up closes the pressure balance (763). |
|
11/04 |
UNI-h-Kap1 |
13 |
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
Description of function: |
|
|
Wrapping arm forward |
The solenoid valve controls the wrapping arm hydraulic motor. |
|
solenoid valve (Y133) |
A wrapping arm motor flow controller 767 is provided in the volume flow |
|
|
input and keeps the volume flow constant. |
|
|
When the control unit is activated, this volume flow is pumped to the |
|
|
hydraulic motor (234) which drives the wrapping arm with 28 ... 30 rpm |
|
|
max. The flow controller may be accessed via the screw plug at the |
|
|
bottom of the control unit. |
|
|
The rotational speed of the wrapping arm of 27 rpm ensures that the |
|
|
wrapping process is shorter than the time required for producing the bale. |
|
Wrapping arm reverse |
The solenoid valve changes the direction of oil flow to the wrapping arm |
|
solenoid valve (Y134) |
motor (234) and consequently its sense of rotation. |
|
Lower tipping cradle |
The solenoid valve lowers the tipping cradle. |
|
solenoid valve (Y135) |
|
|
Raise tipping cradle |
The solenoid valve raises the tipping cradle. The lock-up valve unit 734 |
|
solenoid valve (Y136) |
avoids lowering of the raised tipping cradle. |
|
Lower wrapping table |
The solenoid valve lowers the wrapping table. The lock-up valve unit 734 |
|
solenoid valve (Y137) |
in the cylinder line avoids lowering of the loaded wrapping table. |
|
Raise wrapping table |
The solenoid valve raises the wrapping table. |
|
solenoid valve (Y138) |
|
|
Open film cutters solenoid |
The solenoid valve opens both film cutters. |
|
valve (Y139) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
Close film cutters solenoid |
The solenoid valve closes both film cutters. |
|
valve (Y140) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
14 |
UNI-h-Kap1 |
11/04 |
1.3
Hydraulic circuit diagram
-from machine no.: 72600531
-with film clamping cutters flow divider (769)
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
1.3Hydraulic circuit diagram from machine no.: 72600531, with film clamping cutters flow divider (769)
Key to diagram: |
1 |
|
2 |
|
3 |
|
3a |
4
5
6
Feed line Return line Valve block Plate
Clamping cutters valve block Wrapping arm motor valve block Disc brake
234Wrapping arm motor
235Wrapping table motor
374Film clamping cutters hydraulic cylinder
375Tipping cradle hydraulic cylinder
376Wrapping table hydraulic cylinder
406 Orifice plate Ø 0.8 mm
410 Orifice plate Ø 1.5 mm
630Wrapping table flow control valve
631Tipping cradle shut-off valve
706 Pressure relief valve
732-1 Non-return valve
732-2 Non-return valve
732-3 Non-return valve
732-4 Non-return valve
734 Lock-up valve unit
763Input pressure balance
764Pressure relief valve (left) 115+10 bar
765Pressure relief valve (right)
766Lower brake valve
767Wrapping arm motor flow controller
768LS signal shuttle valves
769Film clamping cutters flow divider
Y77 Master valve solenoid valve
Y133 Wrapping arm motor forward solenoid valve
Y134 Wrapping arm motor reverse solenoid valve
Y135 Lower tipping cradle solenoid valve
Y136 Raise tipping cradle solenoid valve
Y137 Lower wrapping table solenoid valve
Y138 Raise wrapping table solenoid valve
Y139 Open film cutters solenoid valve
Y140 Close film cutters solenoid valve
16 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
Description of function: |
|
|
Orifice plate (406) |
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and |
|
Ø 0.8 mm |
consequently uncontrolled movements of the wrapping arm motor (234). |
|
Wrapping table flow control |
The wrapping table flow control valve supplies the hydraulic motor (235) |
|
valve (630) |
via output (A). |
|
|
This volume flow can be adjusted and changes the wrapping table motor / |
|
|
wrapping arm motor speed ratio and consequently the film layer overlaps. |
|
Tipping cradle shut-off valve |
During service work, the tipping cradle shut-off valve shuts off the oil flow |
|
(631) |
from the hydraulic cylinders 375. |
|
Pressure relief valve (706) |
The pressure relief valve limits the pressure to 70 bar when lowering the |
|
|
tipping cradle hydraulic cylinders. |
|
Non-return valve (732-3) |
The non-return valve avoids faulty functions of the film clamping cutters |
|
|
by building up pressure in the T line. |
|
Input pressure balance |
The input pressure balance keeps the connection from P to T open when |
|
(763) |
no control unit is actuated in valve block 3. |
|
|
It is closed by LS pressure. The LS pressure is built up when the master |
|
|
valve (Y77-2) or a control unit in valve block 3 is actuated. |
|
Pressure relief valve (764) |
The pressure relief valve limits the oil pressure to the wrapping arm motor |
|
|
(234) and the wrapping table motor (drive) connected in series to |
|
|
115+10 bar. |
|
Pressure relief valve (765) |
The pressure relief valve limits the oil pressure of the wrapping arm motor |
|
|
(234) to 115+10 bar when decelerating. |
|
Lower brake valve (766) |
The non-return valves 732-1/ 732-2 and the lower brake valve (766) |
|
|
decelerate the wrapping arm motor (234) hydraulically on both sides if the |
|
|
wrapping arm forward solenoid valve (Y133) is not energized. |
|
Wrapping arm motor flow |
The flow controller keeps the volume flow to the wrapping arm motor |
|
controller (767) |
(234) constant. |
|
|
Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm |
|
|
motor. |
|
|
Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm |
|
|
motor. |
|
LS signal shuttle valves |
When operating the control valves in parallel mode, the shuttle valves |
|
(768) |
allow sending the highest load pressure to the input pressure balance |
|
|
(763) in each case. |
|
Film clamping cutters flow |
The flow divider divides the oil flows for opening and closing the film |
|
divider (769) |
clamping cutters. |
|
Master valve solenoid valve |
The master valve solenoid valve is actuated automatically when a |
|
(Y77) |
hydraulic function is to be carried out on the baler. |
|
|
Now the pump flow is directed into the LS line so that the pressure that |
|
|
builds up closes the pressure balance (763). |
|
11/04 |
UNI-h-Kap1 |
17 |
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
Description of function: |
|
|
Wrapping arm forward |
The solenoid valve controls the wrapping arm hydraulic motor. |
|
solenoid valve (Y133) |
A wrapping arm motor flow controller 767 is provided in the volume flow |
|
|
input and keeps the volume flow constant. |
|
|
When the control unit is activated, this volume flow is pumped to the |
|
|
hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm |
|
|
max. The flow controller may be accessed via the screw plug at the |
|
|
bottom of the control unit. |
|
|
The rotational speed of the wrapping arm of 27 rpm ensures that the |
|
|
wrapping process is shorter than the time required for producing the bale. |
|
Wrapping arm reverse |
The solenoid valve changes the direction of oil flow to the wrapping arm |
|
solenoid valve (Y134) |
motor (234) and consequently its sense of rotation. |
|
Lower tipping cradle |
The solenoid valve lowers the tipping cradle. |
|
solenoid valve (Y135) |
|
|
Raise tipping cradle |
The solenoid valve raises the tipping cradle. The lock-up valve unit 734 |
|
solenoid valve (Y136) |
avoids lowering of the raised tipping cradle. |
|
Lower wrapping table |
The solenoid valve lowers the wrapping table. The lock-up valve unit 734 |
|
solenoid valve (Y137) |
in the cylinder line avoids lowering of the loaded wrapping table. |
|
Raise wrapping table |
The solenoid valve raises the wrapping table. |
|
solenoid valve (Y138) |
|
|
Open film cutters solenoid |
The solenoid valve opens both film cutters. |
|
valve (Y139) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
Close film cutters solenoid |
The solenoid valve closes both film cutters. |
|
valve (Y140) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
18 |
UNI-h-Kap1 |
11/04 |
1.4
Hydraulic circuit diagram
-from serial no.: 72601047
-with valve combination (630, 706, 769)
-without 3-stage restrictor (645)
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
1.4Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), without 3-stage restrictor (645)
Key to diagram: |
1 |
Feed line |
|
2 |
Return line |
|
3 |
Valve block |
|
4 |
Valve block |
|
5 |
Valve block |
|
6 |
Disc brake |
|
7 |
Valve combination |
|
8 |
Manifold |
|
234 |
Wrapping arm motor |
|
235 |
Wrapping table motor |
|
374 |
Film clamping cutters hydraulic cylinder |
|
375 |
Tipping cradle hydraulic cylinder |
|
376 |
Wrapping table hydraulic cylinder |
|
406 |
Orifice plate Ø 0.8 mm |
|
410 |
Orifice plate Ø 1.5 mm |
|
630 |
Wrapping table flow control valve |
|
631 |
Tipping cradle shut-off valve |
|
634 |
System screw |
|
706 |
Pressure relief valve |
|
732 |
Non-return valve |
|
734 |
Lock-up valve unit |
|
763 |
Input pressure balance |
|
764 |
Pressure relief valve (left) 115+10 bar |
|
765 |
Pressure relief valve (right) |
|
766 |
Lower brake valve |
|
767 |
Wrapping arm motor flow controller |
|
768 |
LS signal shuttle valves |
|
769 |
Film clamping cutters flow divider |
|
Y77 |
Master valve solenoid valve |
|
Y133 |
Wrapping arm motor forward solenoid valve |
|
Y134 |
Wrapping arm motor reverse solenoid valve |
|
Y135 |
Lower tipping cradle solenoid valve |
|
Y136 |
Raise tipping cradle solenoid valve |
|
Y137 |
Lower wrapping table solenoid valve |
|
Y138 |
Raise wrapping table solenoid valve |
|
Y139 |
Open film cutters solenoid valve |
|
Y140 |
Close film cutters solenoid valve |
20 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
Description of function: |
|
|
Orifice plate (406) |
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and |
|
Ø 0.8 mm |
consequently uncontrolled movements of the wrapping arm motor (234). |
|
Wrapping table flow control |
The wrapping table flow control valve supplies the hydraulic motor (235) |
|
valve (630) |
via output (A). |
|
|
This volume flow can be adjusted and changes the wrapping table motor / |
|
|
wrapping arm motor speed ratio and consequently the film layer overlaps. |
|
Tipping cradle shut-off valve |
During service work, the tipping cradle shut-off valve shuts off the oil flow |
|
(631) |
from the hydraulic cylinders 375. |
|
Pressure relief valve (706) |
The pressure relief valve limits the pressure to 70 bar when lowering the |
|
|
tipping cradle hydraulic cylinders. |
|
Non-return valve (732-3) |
The non-return valve avoids faulty functions of the film clamping cutters |
|
|
by building up pressure in the T line. |
|
Input pressure balance |
The input pressure balance keeps the connection from P to T open when |
|
(763) |
no control unit is actuated in valve block 3. |
|
|
It is closed by LS pressure. The LS pressure is built up when the master |
|
|
valve (Y77-2) or a control unit in valve block 3 is actuated. |
|
Pressure relief valve (764) |
The pressure relief valve limits the oil pressure to the wrapping arm motor |
|
|
(234) and the wrapping table motor (drive) connected in series to |
|
|
115+10 bar. |
|
Pressure relief valve (765) |
The pressure relief valve limits the oil pressure of the wrapping arm motor |
|
|
(234) when decelerating. |
|
Lower brake valve (766) |
The non-return valves 732-1/ 732-2 and the lower brake valve (766) |
|
|
decelerate the wrapping arm motor (234) hydraulically on both sides if the |
|
|
wrapping arm forward solenoid valve (Y133) is not energized. |
|
Wrapping arm motor flow |
The flow controller keeps the volume flow to the wrapping arm motor |
|
controller (767) |
(234) constant. |
|
|
Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm |
|
|
motor. |
|
|
Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm |
|
|
motor. |
|
LS signal shuttle valves |
When operating the control valves in parallel mode, the shuttle valves |
|
(768) |
allow sending the highest load pressure to the input pressure balance |
|
|
(763) in each case. |
|
Film clamping cutters flow |
The flow divider divides the oil flows for opening and closing the film |
|
divider (769) |
clamping cutters. |
|
Master valve solenoid valve |
The master valve solenoid valve is actuated automatically when a |
|
Y77 |
hydraulic function is to be carried out on the baler. Now the pump flow is |
|
|
directed into the LS line so that the pressure that builds up closes the |
|
|
pressure balance (763). |
|
11/04 |
UNI-h-Kap1 |
21 |
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
Description of function: |
|
|
Wrapping arm forward |
The solenoid valve controls the wrapping arm hydraulic motor. |
|
solenoid valve (Y133) |
A wrapping arm motor flow controller (767) is provided in the volume flow |
|
|
input and keeps the volume flow constant. |
|
|
When the control unit is activated, this volume flow is pumped to the |
|
|
hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm |
|
|
max. The flow controller may be accessed via the screw plug at the |
|
|
bottom of the control unit. |
|
|
The rotational speed of the wrapping arm of 27 rpm ensures that the |
|
|
wrapping process is shorter than the time required for producing the bale. |
|
Wrapping arm reverse |
The solenoid valve changes the direction of oil flow to the wrapping arm |
|
solenoid valve (Y134) |
motor (234) and consequently its sense of rotation. |
|
Lower tipping cradle |
The solenoid valve lowers the tipping cradle. |
|
solenoid valve (Y135) |
|
|
Raise tipping cradle |
The solenoid valve raises the tipping cradle. The lock-up valve unit (734) |
|
solenoid valve (Y136) |
avoids lowering of the raised tipping cradle. |
|
Lower wrapping table |
The solenoid valve lowers the wrapping table. The lock-up valve unit |
|
solenoid valve (Y137) |
(734) in the cylinder line avoids lowering of the loaded wrapping table. |
|
Raise wrapping table |
The solenoid valve raises the wrapping table. |
|
solenoid valve (Y138) |
|
|
Open film cutters solenoid |
The solenoid valve opens both film cutters. |
|
valve (Y139) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
Close film cutters solenoid |
The solenoid valve closes both film cutters. |
|
valve (Y140) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
22 |
UNI-h-Kap1 |
11/04 |
1.5
Hydraulic circuit diagram
-from serial no.: 72601047
-with valve combination (630, 706, 769)
-with 3-stage restrictor (645)
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
1.5Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), with 3-stage restrictor (645)
Key to diagram: |
1 |
Feed line |
|
2 |
Return line |
|
3 |
Valve block |
|
4 |
Valve block |
|
5 |
Valve block |
|
6 |
Disc brake |
|
7 |
Valve combination |
|
8 |
Manifold |
|
234 |
Wrapping arm motor |
|
235 |
Wrapping table motor |
|
374 |
Film clamping cutters hydraulic cylinder |
|
375 |
Tipping cradle hydraulic cylinder |
|
376 |
Wrapping table hydraulic cylinder |
|
406 |
Orifice plate Ø 0.8 mm |
|
410 |
Orifice plate Ø 1.5 mm |
|
630 |
Wrapping table flow control valve |
|
631 |
Tipping cradle shut-off valve |
|
634 |
System screw |
|
645 |
3-stage restrictor |
|
706 |
Pressure relief valve |
|
732 |
Non-return valve |
|
734 |
Lock-up valve unit |
|
763 |
Input pressure balance |
|
764 |
Pressure relief valve (left) 115+10 bar |
|
765 |
Pressure relief valve (right) |
|
766 |
Lower brake valve |
|
767 |
Wrapping arm motor flow controller |
|
768 |
LS signal shuttle valves |
|
769 |
Film clamping cutters flow divider |
|
Y77 |
Master valve solenoid valve |
|
Y133 |
Wrapping arm motor forward solenoid valve |
|
Y134 |
Wrapping arm motor reverse solenoid valve |
|
Y135 |
Lower tipping cradle solenoid valve |
|
Y136 |
Raise tipping cradle solenoid valve |
|
Y137 |
Lower wrapping table solenoid valve |
|
Y138 |
Raise wrapping table solenoid valve |
|
Y139 |
Open film cutters solenoid valve |
|
Y140 |
Close film cutters solenoid valve |
24 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
Description of function: |
|
|
Orifice plate (406) |
The orifice plate (406) Ø 0.8 mm avoids pressure build-up and |
|
Ø 0.8 mm |
consequently uncontrolled movements of the wrapping arm motor (234). |
|
Wrapping table flow control |
The wrapping table flow control valve supplies the hydraulic motor (235) |
|
valve (630) |
via output (A). |
|
|
This volume flow can be adjusted and changes the wrapping table motor / |
|
|
wrapping arm motor speed ratio and consequently the film layer overlaps. |
|
Tipping cradle shut-off valve |
During service work, the tipping cradle shut-off valve shuts off the oil flow |
|
(631) |
from the hydraulic cylinders 375. |
|
Pressure relief valve (706) |
The pressure relief valve limits the pressure to 70 bar when lowering the |
|
|
tipping cradle hydraulic cylinders. |
|
Non-return valve (732-3) |
The non-return valve avoids faulty functions of the film clamping cutters |
|
|
by building up pressure in the T line. |
|
Input pressure balance |
The input pressure balance keeps the connection from P to T open when |
|
(763) |
no control unit is actuated in valve block 3. |
|
|
It is closed by LS pressure. The LS pressure is built up when the master |
|
|
valve (Y77-2) or a control unit in valve block 3 is actuated. |
|
Pressure relief valve (764) |
The pressure relief valve limits the oil pressure to the wrapping arm motor |
|
|
(234) and the wrapping table motor (drive) connected in series to |
|
|
115+10 bar. |
|
Pressure relief valve (765) |
The pressure relief valve limits the oil pressure of the wrapping arm motor |
|
|
(234) when decelerating. |
|
Lower brake valve (766) |
The non-return valves 732-1/ 732-2 and the lower brake valve (766) |
|
|
decelerate the wrapping arm motor (234) hydraulically on both sides if the |
|
|
wrapping arm forward solenoid valve (Y133) is not energized. |
|
Wrapping arm motor flow |
The flow controller keeps the volume flow to the wrapping arm motor |
|
controller (767) |
(234) constant. |
|
|
Maximum wrapping speed (approx. 20 l/min.) with SAM wrapping arm |
|
|
motor. |
|
|
Maximum wrapping speed (approx. 31 l/min.) with Danfoss wrapping arm |
|
|
motor. |
|
LS signal shuttle valves |
When operating the control valves in parallel mode, the shuttle valves |
|
(768) |
allow sending the highest load pressure to the input pressure balance |
|
|
(763) in each case. |
|
Film clamping cutters flow |
The flow divider divides the oil flows for opening and closing the film |
|
divider (769) |
clamping cutters. |
|
Master valve solenoid valve |
The master valve solenoid valve is actuated automatically when a |
|
(Y77) |
hydraulic function is to be carried out on the baler. Now the pump flow is |
|
|
directed into the LS line so that the pressure that builds up closes the |
|
|
pressure balance (763). |
|
11/04 |
UNI-h-Kap1 |
25 |
Hydraulic System |
UNIWRAP |
TIC |
|
|
|
Description of function: |
|
|
Wrapping arm forward |
The solenoid valve controls the wrapping arm hydraulic motor. |
|
solenoid valve (Y133) |
A wrapping arm motor flow controller (767) is provided in the volume flow |
|
|
input and keeps the volume flow constant. |
|
|
When the control unit is activated, this volume flow is pumped to the |
|
|
hydraulic motor (234) which drives the wrapping arm with 28 … 30 rpm |
|
|
max. The flow controller may be accessed via the screw plug at the |
|
|
bottom of the control unit. |
|
|
The rotational speed of the wrapping arm of 27 rpm ensures that the |
|
|
wrapping process is shorter than the time required for producing the bale. |
|
Wrapping arm reverse |
The solenoid valve changes the direction of oil flow to the wrapping arm |
|
solenoid valve (Y134) |
motor (234) and consequently its sense of rotation. |
|
Lower tipping cradle |
The solenoid valve lowers the tipping cradle. |
|
solenoid valve (Y135) |
|
|
Raise tipping cradle |
The solenoid valve raises the tipping cradle. The lock-up valve unit (734) |
|
solenoid valve (Y136) |
avoids lowering of the raised tipping cradle. |
|
Lower wrapping table |
The solenoid valve lowers the wrapping table. The lock-up valve unit |
|
solenoid valve (Y137) |
(734) in the cylinder line avoids lowering of the loaded wrapping table. |
|
Raise wrapping table |
The solenoid valve raises the wrapping table. |
|
solenoid valve (Y138) |
|
|
Open film cutters solenoid |
The solenoid valve opens both film cutters. |
|
valve (Y139) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
Close film cutters solenoid |
The solenoid valve closes both film cutters. |
|
valve (Y140) |
The wrapping table raise solenoid coil (Y138) is actuated simultaneously |
|
|
with solenoid coils (Y139). This is necessary in order to build up pressure |
|
|
in the LS line to make the input pressure balance (763) close. |
|
3-stage restrictor (645)
To enable raising and lowering the wrapping table at different speeds, the respective speed may be preselected using the 3-stage restrictor, see chapter 4-15.
26 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
2
Pre-conditions for use
2.1 |
Blocking the master valve (Y77) ..................................................... |
28 |
2.2 |
Connection to tractor hydraulic system........................................... |
29 |
11/04 |
UNI-h-Kap2 |
27 |
Hydraulic System |
UNIWRAP |
TIC |
2.1
Blocking the master valve (Y77)
From serial no.
1 Circulation shut-off valve solenoid coil (Y77-1) Caution: The screw must be turned in.
The circulation shut-off valve is now permanently shut off. 2 Hand lever.
Horizontally (to the outside) = Working position Vertically (to the bottom) = The tailgate is safeguarded in open position (for service work)
P Feed line to UNIWRAP.
T Return line from UNIWRAP.
Up to machine no.
1 Tee
2 Circulation shut-off valve solenoid coil (Y77-1) P Feed line to UNIWRAP.
T Return line from UNIWRAP.
28 |
UNI-h-Kap1 |
11/04 |
TIC |
UNIWRAP |
Hydraulic System |
|
|
|
2.2
Connection to tractor hydraulic system
Description of function: 1/2
The attachment can be connected to any tractor hydraulic system available on the market.
Connection to tractors with constant-flow hydraulic system
Connection to tractors with constant-pressure hydraulic system
The quick release coupling 1 is connected to a control unit port of the tractor with adjustable oil flow.
This control unit provides oil supply for the attachment and is adjusted to a constant volume flow of Qmax = 35 to 50 l/min.
The system screw 634 is turned out up to the stop so that the input pressure balance 763 is operative.
The quick release coupling 2 is in general connected to the pressureless return line T of the tractor.
If a pressureless return line is not allowed in continuous operation (e.g. because lubrication of the tractor gearbox is not guaranteed), a doubleacting control unit can be used for supplying oil to the attachment.
In this case, the quick release coupling 1 is connected to port A (feed) and quick release coupling 2 to port B (return) of the corresponding tractor control valve.
Adjust the volume flow to Qmax = 35 to 50 l/min; please refer also to the tractor's Operating Manual (e.g. "Continuous operation of hydraulic motors").
The LS connection (LS, working hydraulics signal) is not used here.
If the tractor is not provided with a flow-adjustable control unit, the volume flow must not exceed 35 to 50 l/min.
The quick release coupling 1 is connected to a control unit port of the tractor with adjustable oil flow.
This control unit provides oil supply for the attachment and is adjusted to an oil flow of Qmax = 35 to 50 l/min.
The system screw 634 is turned in up to the stop so that the input pressure balance 763 is blocked.
The tractor's hydraulic pump is shut down when the system pressure has been reached.
The quick release coupling 2 is connected to port T (pressureless return line) of the tractor.
The LS connection (LS, working hydraulics signal) is not used here.
11/04 |
UNI-h-Kap2 |
29 |
Hydraulic System |
UNIWRAP |
TIC |
Description of function: 2/2
Connection to tractors with load-sensing system and a Power Beyond port
Test points/characteristics
The quick release coupling 1 is connected directly to the pump via the Power Beyond port P.
The quick release coupling 2 is connected to port T (pressureless return line) of the tractor.
Here the LS connection (LS, working hydraulics signal) is connected with the LS signal port of the tractor (the kit is available from the spare parts department).
The system screw 634 is turned in up to the stop so that the input pressure balance 763 is blocked.
The tractor's hydraulic pump regulates as a function of the attachment's load signal.
When no function is active on the attachment, the attachment must not load the tractor hydraulically.
(The tractor engine speed must not be reduced).
The allowed temperature of the tractor's hydraulic system must not be exceeded; see also the Operator's Manual of the tractor.
Connection to tractors with load-sensing system without a Power Beyond port
The quick release coupling 1 is connected to a control unit port of the tractor with adjustable oil flow.
This control unit provides oil supply for the attachment and is adjusted to a constant volume flow of Qmax = 35 to 50 l/min.
The system screw 634 is turned out up to the stop so that the input pressure balance 763 is operative.
The quick release coupling 2 is in general connected to the pressureless return line T of the tractor.
If a pressureless return line is not allowed in continuous operation (e.g. because lubrication of the tractor gearbox is not guaranteed), a doubleacting control unit can be used for supplying oil to the attachment.
In this case, the quick release coupling 1 is connected to port A (feed) and quick release coupling 2 to port B (return) of the corresponding tractor control valve.
Adjust the volume flow to Qmax = 35 to 50 l/min; please refer also to the tractor's Operating Manual (e.g. "Continuous operation of hydraulic motors").
The LS connection (LS, working hydraulics signal) is not used here.
If the tractor is not provided with a flow-adjustable control unit, the volume flow must not exceed 35 to 50 l/min.
30 |
UNI-h-Kap1 |
11/04 |
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