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Loading...Basic Hydraulic And Components
YUKEN KOGYO CO.,L
TABLE of CONTENTS
PREFACE
1． WORLD OF HYDRAULICS 1
1-1 Introduction
1-2 Basis of Hydraulics
2．HYDRAULIC PUMPS 5
2-1 Comparison of the Pumps
2-2 Piston Pumps
2-3 Vane Pumps
2-4 Gear Pumps
2-5 Screw Pumps
2-6 Reciprocal Pumps
3．PRESSURE CONTROL VALVES 16
3-1 Relief Valves
3-2 Sequence Valves
3-3 Counterbalance Valves
3-4 Unloading Relief Valves
3-5 Pressure Reducing Valves/Pressure Reducing and Check Valves
3-6 Brake Valves
3-7 Balancing Valves (Pressure Reducing and Relieving Valves)
3-8 Pressure Switches
4．DIRECTIONAL CONTROL VALVES 22
4-1 Classification of Directional Control Valves
4-2 Structure and Characteristics of Directional Valves
4-2-1 Solenoid Operated Directional Valves
4-2-2 Solenoid Controlled Pilot Operated Directional Valves
4-2-3 Poppet Type Solenoid Controlled Pilot Operated Directional Control Valves
4-2-4 Shut-off Type Solenoid Operated Directional Valves
(Poppet Type Two-Way Solenoid Operated Directional Valves)
4-2-5 Pilot Operated Directional Valves
4-2-6 Manually Operated Directional Valves
4-2-7 Check Valves
4-2-8 Pilot Operated Check Valves
4-2-9 Multiple Control Valves
5．FLOW CONTROL VALVES 32
5-1 Restrictors/One Way Restrictors
5-2 Flow Control Valves/Flow Control and Check Valves
5-3 Deceleration Valves/Deceleration and Check Valves
5-4 Feed Control Valves
5-5 Pilot Operated Flow Control and Check Valves
6． MODULAR VALVES 37
7． LOGIC VALVES 38
8．PROPORTIONAL ELECTRO-HYDRAULIC CONTROL VALVES 41
8-1 Proportional Electro-Hydraulic Pilot Relief Valves
8-2 Proportional Electro-Hydraulic Relief Valves
8-3 Proportional Electro-Hydraulic Relieving and Reducing Valves
8-4 Proportional Electro-Hydraulic Flow Control (and Check) ValvesTABLE of CONTENTS ■
8-5 Proportional Electro-Hydraulic Flow Control and Relief Valves
8-6 Proportional Electro-Hydraulic Directional and Flow Control Valves
8-7 Power Amplifiers For Proportional Electro-Hydraulic Control Valves
8-8 Setting Adjusters
8-9 Circuit Example of Proportional Electro-Hydraulic Control Valves
8-10 Hybrid Proportional Electro-Hydraulic Control Valves
9． SERVOMECHANISM & SERVO VALVES 49
9-1 Servomechanism (Tracking Mechanism)
9-2 Servo Valve Selection
9-3 Electro-Hydraulic Two-Stage Servo Valves
9-4 Direct Drive Servo Valves
9-5 Servo Amplifiers
9-6 Sensors
9-7 Hydraulic Power Source
9-8 Servo Systems with Pump Speed Control
9-9 Related Terms
10．ACTUATORS 58
10-1 Hydraulic Cylinders
10-2 Hydraulic Motors
10-3 Oscillating Motors
11．HYDRAULIC ACCESSORIES 63
11-1 Filters
11-2 Accumulators
11-3 Heat Exchangers
11-4 Measuring Instruments
11-5 Valves
11-6 Others
12．HYDRAULIC UNITS 71
12-1 Reservoirs
12-2 Others
13．TROUBLESHOOTING FOR HYDRAULIC EQUIPMENT 73
14．HYDRAULIC FLUIDS 75
14-1 Selection
14-2 Petroleum-Based Fluid
14-3 Viscosity
14-4 Contamination Control
14-5 Application Limit
14-6 Contamination Measurement Instruments
14-7 Fire Resistance Fluid
14-8 Biodegradable Fluid
15．HYDRAULIC CIRCUITS 82
15-1 Unload Circuits
15-2 Pressure Control Circuits
15-3 Speed Control Circuits
15-4 Filter Circuits
15-5 Synchronizing Circuits
15-6 Intensifying Circuits
15-7 Brake Circuits
15-8 Closed Circuits
Appendix: Main Formulas
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