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CAT挖掘机307C液压原理图RENR4016-01
25 24 23
22
27
20 18 16 11
29 17
PSA
33
PAC
36 PIN
307C Excavators Hydraulic System
BAJ1-UP BCM1-UP
RENR4016-01 August 2005
PUMP or MOTOR
FLUID CONDITIONER
FLUID POWER SYMBOLS
BASIC COMPONENT SYMBOLS
SPRING
CONTROL VALVES
RESTRICTION
LINE RESTRICTION (FIXED)
MAIN AUX.
PUMP: VARIABLE and
2-SECTION PUMP PRESSURE COMPENSATED
VARIABILITY
SPRING (ADJUSTABLE)
LINE RESTRICTION (VARIABLE)
VALVE ENVELOPES
PRESSURE COMPENSATION
VALVES
HYDRAULIC
PNEUMATIC
ENERGY TRIANGLES
LINE RESTRICTION VARIABLE and PRESSURE
COMPENSATED
VALVE PORTS
ATTACHMENT
ONE POSITION
AB
PT NORMAL POSITION
TWO POSITION
THREE POSITION
CONTROL VALVES
AB
PT SHIFTED POSITION
MEASUREMENT
INFINITE POSITION
TWO-WAY
THREE-WAY
CHECK VALVES
FOUR-WAY
BASIC SYMBOL
SPRING LOADED
SHUTTLE
ROTATING SHAFTS
PILOT CONTROLLED
PRESSURE
TEMPERATURE
VENTED
PRESSURIZED
FLOW
UNIDIRECTIONAL
FLUID STORAGE RESERVOIRS
RETURN ABOVE FLUID LEVEL
COMBINATION CONTROLS
BIDIRECTIONAL RETURN BELOW FLUID LEVEL
SOLENOID
SOLENOID or MANUAL
SOLENOID and PILOT
SOLENOID and PILOT or MANUAL
MANUAL CONTROL SYMBOLS
SERVO
THERMAL
DETENT
PUSH-PULL LEVER
MANUAL SHUTOFF
RELEASED PRESSURE
GENERAL MANUAL
PILOT CONTROL SYMBOLS
PUSH BUTTON
PEDAL
SPRING
REMOTE SUPPLY PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
ACCUMULATORS
SIMPLIFIED
COMPLETE
INTERNAL SUPPLY PRESSURE
CROSSING AND JOINING LINES
HYDRAULIC AND PNEUMATIC CYLINDERS
SPRING LOADED
GAS CHARGED
HYDRAULIC PUMPS
FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
LINES CROSSING
LINES JOINING
HYDRAULIC MOTORS
FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
SINGLE ACTING
DOUBLE ACTING
INTERNAL PASSAGEWAYS
INFINITE POSITIONING
THREE POSITION
TWO POSITION
FLOW IN ONE DIRECTION
PARALLEL FLOW
CROSS FLOW
FLOW ALLOWED IN EITHER DIRECTION
? 2005 Caterpillar All Rights Reserved
Printed in U.S.A.
Transducer (Fluid)
Electrical Symbols Table
Hydraulic Symbols (Electrical)
Transducer (Gas / Air)
G
Generator
M
Electric Motor
Pressure Switch
Pressure
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