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Hydraulic Components and Systems

Type of study Doctoral
Language of instruction Czech
Code 338-0954/01
Abbreviation HPaS
Course title Hydraulic Components and Systems
Credits 10
Coordinating department Department of Hydromechanics and Hydraulic Equipment
Course coordinator doc. Dr. Ing. Lumír Hružík

Subject syllabus

1. Hydrostatic pumps and motors

1.1 Types, basic parameters of hydrostatic pumps and motors
1.2 Energy balance, efficiencies of hydrostatic pumps and motors
1.3 Static characteristics of hydrostatic pumps and motors
1.4 Dynamics of hydrostatic pumps and motors
1.5 Construction of hydrostatic pumps and motors
1.5.1 Rotary: gear, screw, vane, radial piston, axial piston, orbital
1.5.2 Rotary actuators
1.5.3 Hydraulic cylinders
1.6 Control of hydrostatic pumps and motors
1.6.1 Direct displacement control of hydrostatic pumps and motors
1.6.2 Pumps mechanical-hydraulic control: constant pressure, constant flow,
constant power. Load-Sensing systems
1.6.3 Pumps electrohydraulic control with proportional valves and servo valves
1.7 Hydraulic motors passive resistances, stick-slip, limitation of minimum speed

2. Control valves

2.1 Directional seat and spool valves. Slip-in cartridge valves
2.2 Check valves, pilot operated check valves, double pilot operated check valves
2.3 Flow control valves: Orifices, nozzles, throttle valves, two-way and three-way flow control valves
2.4 Proportional directional control valves
2.5 Servo valves
2.6 Pressure control valves: pressure relief, pressure reducing, sequence and
unloading valves. Direct and pilot operated pressure valves

3. Accessories of hydraulic systems

3.1 Hydraulic accumulators
3.2 Filters and filtration of liquids
3.3 Seals in hydraulic systems
3.4 Tanks
3.5 Heaters, coolers
3.6 Hydraulic lines

4. Working fluids of hydraulic systems

4.1 Physical properties
4.2 Chemical properties
4.3 Ecological properties
4.4 Types of used hydraulic fluids, classification

5. Hydrostatic systems

5.1 Hydrostatic drive control
5.1.1 Speed control of hydraulic motor:
- variable displacement pump control
- valve control
5.1.2 Force and torque control
5.2 Energy saving hydrostatic systems
5.2.1 Energy saving hydraulic power unit
5.2.2 Open centre and closed centre Load-sensing systems
5.2.3 Secondary control of hydraulic motors
5.2.4 Systems with pressure energy recuperation
3.5 Hydrostatic systems with accumulators
5.4 Hydrostatic systems with slip-in cartridge valves
5.5 Hydrostatic systems with proportional directional control valves
5.6 Pressure compensation with two-way and three-way flow control valves
5.7 Hydrostatic transmissions
5.8 Hydrostatic systems with two and more hydraulic motors. Synchronous operation of hydraulic motors
5.9 Servomechanisms

Literature

[1] EXNER, H. et al. Hydraulics, Basic Principles and Components. Würzburg, Germany: Bosch Rexroth AG., 2011. 326 p. ISBN 978-3-9814879-3-0 .
[2] EWALD, R. et al. Proportional and Servo-valve Technology. Lohr am Main, Germany: Bosch Rexroth AG, 2003. 300 p.
[3] GÖTZ, W. Hydraulics. Theory and Application. Ditzingen: Rexroth Bosch Group + OMEGON, 1998. 291 p. ISBN 0-7680-0242-7.
[4] NOACK, S. Hydraulics in Mobile Equipment. Ditzingen: Rexroth Bosch Group + OMEGON, 2001. 202 p. ISBN 0-7680-0886-7.

Advised literature

[1] IVANTYŠYN, J., IVANTYŠYNOVÁ. Hydrostatic pumps and motors: principles, design, performance, modelling, analysis, control and testing. New Delhi: Tech Books International. 2003. 512 p. ISBN 81-82305-08-1 .
[2] HEHN, H. et al. Fluid Power Troubleshooting. New York: Marcel Dekker. 1995. 647 p. ISBN 0-8247-9275-0.
[3] MANRING, N. D. Hydraulic Control Systems. John Wiley & Sons. 2005. 426 p. Online version available at: https://app.knovel.com/web/toc.v/cid:kpHCS0000E/viewerType:toc
[4] CHOW, V. T. Open-channel hydraulics. Caldwell : Blackburn Press, 2007. 680 p. ISBN 978-1932846188.