User Manual
Table Of Contents
- Technical Systems Hydraulic System UNIWRAP
- Contents
- 1 Hydraulic circuit diagram
- 1.1 Hydraulic circuit diagram up to serial no.: 72600130
- 1.2 Hydraulic circuit diagram from machine no.: 72600131, with tipping cradle service shut-off valve (631)
- 1.3 Hydraulic circuit diagram from machine no.: 72600531, with film clamping cutters flow divider (769)
- 1.4 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), without 3-stage restrictor (645)
- 1.5 Hydraulic circuit diagram from serial no.: 72601047, with valve combination (630, 706, 769), with 3-stage restrictor (645)
- 2 Pre-conditions for use
- 3 Valve block
- 4 Individual components
- 4.1 Input pressure balance (763)
- 4.2 Circulation shut-off valve (Y77-2)
- 4.3 Wrapping arm control unit (Y133)
- 4.4 Tipping cradle control unit (Y135 / Y136)
- 4.5 Wrapping table control unit (Y137 / Y138)
- 4.6 Clamping cutters control unit (Y139 / Y140)
- 4.7 Flow controller (630)
- 4.8 Pressure relief valve (706)
- 4.9 Wrapping arm motor (234)
- 4.10 Wrapping table motor (235)
- 4.11 Tipping cradle service shut-off valve (631)
- 4.12 Film clamping cutters hydraulic cylinder (374)
- 4.13 Film clamping cutters flow divider (769)
- 4.14 Wrapping arm motor valve block (4)
- 4.15 3-stage restrictor
- 4.16 Valve combination (7)
- 4.17 Manifold (8)
- 0293 522.0
Hydraulic System UNIWRAP TIC
36 UNI-h-Kap3 11/04
Description of function:
Intermediate plate (3a) A connection from P to T is open in the intermediate plate.
The LS connection is closed.
Input pressure balance
(763)
The input pressure balance keeps the connection from P to T open when
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.
Wrapping arm motor flow
controller (767)
The flow controller keeps the volume flow to the wrapping arm motor
(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
(768)
When operating the control valves in parallel mode, the shuttle valves
allow sending the highest load pressure to the input pressure balance
(763) in each case.
Master valve solenoid valve
(Y77)
The master valve solenoid valve is actuated automatically when a
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). Now the entire volume flow
of the baler is available for performing hydraulic functions.
Wrapping arm forward
solenoid valve (Y133)
Controls the wrapping arm hydraulic motor.
A flow control valve is provided in the volume flow input which limits the
volume flow to approx. 20l/min on the SAM wrapping arm motor or
approx. 31l/min on the Danfoss wrapping arm motor. When the control
unit is activated, this volume flow is pumped to the wrapping arm motor
(234) which drives the wrapping arm with 28 ... 30 rpm max.
The flow controller may be accessed via the screw plug (F) at the bottom
of the control unit.
If required, adjust the maximum rotational speed of the wrapping arm
between 28 ... 30 rpm by carefully turning in or our the screw.
Screw plug (F) must not protrude. The rotational speed of 28 ... 30 rpm
ensures that the wrapping process is shorter than the time required for
producing the bale.
Lower tipping cradle
solenoid valve (Y135)
The solenoid valve lowers the tipping cradle.
Raise tipping cradle
solenoid valve (Y136)
The solenoid valve raises the tipping cradle. The lock-up valve unit 734
avoids lowering of the raised tipping cradle.
Lower wrapping table
solenoid valve (Y137)
The solenoid valve lowers the wrapping table. The lock-up valve unit 734
in the cylinder line avoids lowering of the loaded wrapping table.
Raise wrapping table
solenoid valve (Y138)
The solenoid valve raises the wrapping table.