TSM 363 Fluid Power Systems

1
TSM 363 Fluid Power 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
5
Operation Principle of Poppet Valves
6
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

7
Performance of Typical Poppet Valves
8
Direct-Acting Poppet Valves
9
Pilot-operated Poppet Valves
10
Typical Configuration of Spool Valves
11
Operation Principle of Spool Valves
12
Performance of Typical Spool Valves
13
Commonly Used Spool Valves
14
Functions of Hydraulic Control Valve
CONTROL VALVES
15
Pressure Checking Valves
pressure check valve
16
Pressure Checking Valves
pressure shuttle valve
17
Pressure Regulating Valves
constant-pressure-reducing
18
Pressure Regulating Valves
fixed-pressure-reducing
19
Pressure Regulating Valves
pilot operated pressure-reducing
20
Pressure Regulating Valves
direct-acting sequencing valve
21
Pressure Regulating Valves
pressure counterbalancing
22
Flow Control Valves
23
Directional Control Valves
24
Prioritized Directional Control Valves
25
Lecture Summary

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