Descripción: informe detallado sobre el sistema Hidraulico de la maquinaria caterpillar 6060 o RH340
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sistema hidraulico de CAT 320CL
sistema hidraulico de CAT 320CLFull description
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Control de servomotor
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Hydraulic Mining Excavator CAT 6060 06. Servo System
Matthias Matt hias Aust - 201 2012 2
Pump Pump Assem Assembly bly - LH Side Side
Service Training
Swing Pump
Gearbox Cooling Pump
Servo Pump
Auxiliary Servo Pump
Engine Fan Drive Pump Swing Charge Pump
Oil Cooling Pumps
Main Pumps
Main Pumps
2
Pump Pump Assem Assembly bly - LH Side Side
Service Training
Swing Pump
Gearbox Cooling Pump
Servo Pump
Auxiliary Servo Pump
Engine Fan Drive Pump Swing Charge Pump
Oil Cooling Pumps
Main Pumps
Main Pumps
2
Servo Pump
Service Training
3
Servo Schematic
Service Training
Servo Pump RH
Servo Pump LH
Emergency Boom Down System
Servo / Pilot Pressure 50 bar
50
-2Y9
-2Y10
-2Y11
-2Y12
-2Y13
-2Y14
-2Y7
-2Y8
Track Tensioning Pressure 60 / 80 bar
-2Y18 -2Y1
-2Y2
-2Y3
-2Y4
-2Y5
-2Y6
-2Y5
-2Y5
-2Y20
4
50 bar Servo System
Service Training
2nd Speed and Travel Brake at Travel Motors Rotary Joint
Clam + Travel Boost Main Pumps
Travel Boost Main Pumps
Hydraulic Oil Cooling System
not used
30 bar
Auxiliary Servo Pressure 50 bar
not used
not used
Servo Pressure 50 bar to Distributor
Swing Park Brake
5
Servo Adjustment
Service Training
View from Outside on Cabin Module:
P1
P3
Test points
P1 , P3 , P4
50 bar
P4
Prop. Valves
-2Y18
-2Y20
P1: 60/80 bar
(Servo Pump Supply)
P3: 50 bar
(Servo Pressure)
P4: 60/80 bar
(Track Tensioning)
6
35 bar Adjustment => Check Point P 2
Service Training
-2Y18
50 bar
-2Y18 -2Y20
Users of 35 bar are:
-2Y20
• Prop. Valves for Attachment Control Valves • Prop. Valves for Float Valves (Boom/Stick) • Prop. Valves for Travel • Prop. Valves for Swing Balance Valve Displacement • Emergency Accumulator
7
50 bar Adjustment => Check Point P 3
Service Training
P3 -2Y18
50 bar
-2Y18
-2Y20
-2Y20
Users of 50 bar are: • Service Lift • Swing Brake Solenoid Valve • Prop. Valves for Main Pump Governing • 2nd Speed for Travel System • Travel Pressure Boost • Auto Lube System 8
60 bar Adjustment => Check Point P 4
Service Training
Machine Working (Attachment / Travel / Idle)
-2Y18
50 bar
P4
-2Y18 -2Y20
-2Y20
Users of 60 bar are: • Track Tensioning System • Swing Blocking Valves • P-Port on the Main Pumps 60 bar servo to swing blocking valves and p-port on the main pumps will only be present if the servo pump on the specific engine is being driven. 9
80 bar Servo Adjustment => Check Point M 1
Service Training
If machine travels for more than 15 sec.: 5 sec after stop travelling, -2Y20 energized for 5s. 50 bar -2Y18
-2Y18
-2Y20
-2Y20
Please use the push button to switch from 60 bar to 80 bar. Then check / adjust the 80 bar pressure.
Users of 80 bar are: • Track Tensioning System ( 5s after travelling) • Service Ladder Pressure increase 10
80 bar Servo
Service Training
80 bar servo pressure is only available if the solenoid -2Y20 is energized. This happens in the following conditions: 1.
After travelling for a time longer then 15 sec.: => 10 sec. after stop travelling the pressure increases to 80 bar for 5 sec.
2.
If the access ladder is not complete lifted: If the “ladder down” initiator is not switched, because the ladder is not complete lifted up. (ladder is to heavy to be lifted with only 60 bar in the system)
Note: If the service lift or ladder are not complete lifted, the swing and travel function is not active! (Safety!!!)
11
Proportional Valve Block – New Style – Electric Side
Proportional Valves for all Controls Attachment / Travel / Swing Operator Seat Safety Solenoid -2Y18
16
Servo Valve Assembly – New Layout => #340099 Emergency Boom Down Solenoid
Service Training
Hydraulic Oil Cooling Proportional Valves (not used if thermostatically controlled!)
Swing Safety Valves
Solenoid Valve Blocks for various Functions
Proportional Valveblock for all Attachment / Travel / Swing Controls Distributor Block for Tank and 50 bar Connections
Pressure Reducing Valve 30 bar only for Travel Brake
-2Y17 Travel Brake
-2Y27 Clam Boost
-2Y24 Travel Boost
Reserve
-2Y22 2nd Speed
Reserve
Reserve
-2X23 Swing Brake
17
Solenoid Valve Banks
Service Training
Travel park brake (Solenoid -2Y17 – (50 bar => reduced to 30 bar) The travel park brake is spring applied and hydraulically released. The brake is released fully, if we use a press ure of 30 bar. The solenoid valve -2Y17 is energized and oil flows to the travel park brakes. They are released and held in the released position. The pressure is reduced to 30 bar to be sure that the brake is open, but 2nd speed should not be active if this valve is energized.
2nd speed travelling (Solenoid -2Y22 – 50 bar) When the operator shifts the switch in the cab from 'low speed' (turtle) to 'high speed’ (rabbit) the pressure in the line to the travel park brake and travel motor regulator is increased to 50 bar and the regulators are shifted to low displacement. The 50 bar overcomes the 30 bar at the shuttle valve [47/1] and the 2nd speed is active.
Swing Park Brake (Solenoid -2Y23 - 50 bar) The swing park brake is spring applied and hydraulically released. In the de-energised position of solenoid -2Y23, the swing brake is connected to tank. => Brakes are applied. When the swing brake is released, -2Y23 is energised and 50 bar is supplied to the swing brakes, overcoming the spring tension => brakes are released. Note: You can’t stop the swing movement by using the swing park brake!!! This will occur heavy demolition on the brake disks!
Travel Boost (Solenoid -2Y24 - 50 bar) The solenoid valve (-2Y24) operates the pressure cut-off valves of main pumps 3 + 5 / 4 + 6 so that the pressure is increased to 320bar + 50bar = 370 bar.
Clam Boost (Solenoid -2Y27 – 50 bar) The solenoid (-2Y27) operates the pressure cut-off valves of the main pumps 2 + 8, so that the clam pressur e is increased to 320bar + 50bar = 370 bar.
18
50 bar Servo System
Swing Balance Valve
Service Training
Auto Greasing System
Y XLR - RH Main Pumps
Y XLR - LH Main Pumps
Y
Y
-4Y1 PST - RH Main Pumps
Service Lift -3Y1 PST - LH Main Pumps
Servo Pressure 50 bar from Distributor
19
60 / 80 bar System
Service Training
Track Tensioning System
Track Tensioning Pressure 60 / 80 bar
Ladder
20
80 bar Auxiliary Pressure
All Main Pumps are supplied with 80bar auxiliary pressure as initial Pressure.
Service Training
LH Auxiliary Pump
to Pump No. 3/4
21
Servo Assembly Plate
Service Training
22
Pumps for Servo- and Auxiliary Pressure – LH Side
Service Training
Servo Pump
Servo Pump
23
Pumps for Servo- and Auxiliary Pressure – RH Side
Service Training
Auxiliary Servo Pump Servo Pump
24
Main Pump Regulation
Service Training
Attention: On the new setup, the prop valves are combined a different way. (see picture on further pages)
25
Pump Regulation - LH Side
Service Training
26
Pump Regulation - RH Side
Service Training
27
Auxiliary Pressure for Main Pumps
Service Training
28
Lines to Operators Cab
Service Training
29
Lines to Operators Cab
Service Training
30
Swing Park Brake Connection
Service Training
31
Travel Park Brake and 1st Speed Connection (30bar)
Service Training
32
Travel Park Brake and 2nd Speed Connection (50bar)
Service Training
33
Travel Park Brake and 1st / 2nd Speed Connection
Service Training
34
Travel Park Brake and 1st / 2nd Speed Connection – LH Side
