ABE 463 Electrohydraulic Systems

1
ABE 463 Electrohydraulic Systems

• Control Valves
• - Key components for power distribution control

2
Power Distribution in Hydraulic Systems
3
Basic Valve Configurations
4
Typical Configuration of Poppet Valves
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Operation Principle of Poppet Valves
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Flow Passability - Orifice Equation

• Cd is determined experimentally
• Pressure drop is proportional to flow
• Valve Principles Area is a adjusted to control
  pressure and flow rate
• Density of petroleum-based fluids 850-950 kg/m3

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Performance of Typical Poppet Valves
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Direct-Acting Poppet Valves
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Pilot-operated Poppet Valves
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Typical Configuration of Spool Valves
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Operation Principle of Spool Valves
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Performance of Typical Spool Valves
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Commonly Used Spool Valves
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Functions of Hydraulic Control Valve
CONTROL VALVES
15
Pressure Checking Valves
pressure check valve
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Pressure Checking Valves
pressure shuttle valve
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Pressure Regulating Valves
constant-pressure-reducing
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Pressure Regulating Valves
fixed-pressure-reducing
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Pressure Regulating Valves
pilot operated pressure-reducing
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Pressure Regulating Valves
direct-acting sequencing valve
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Pressure Regulating Valves
pressure counterbalancing
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Flow Control Valves
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Directional Control Valves
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Prioritized Directional Control Valves
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Lecture Summary

• Discussed the basic principles of different types
  of hydraulic control valves
• Basic valve configuration
• Control of different system parameters