- Docente: Andrea De Pascale
- Credits: 6
- SSD: ING-IND/09
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
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Corso:
Second cycle degree programme (LM) in
Mechanical Engineering (cod. 0938)
Also valid for Second cycle degree programme (LM) in Mechanical Engineering (cod. 0938)
Second cycle degree programme (LM) in Automation Engineering (cod. 8891)
Learning outcomes
This course aims to provide a basic knowledge of “oil Hydraulics and Pneumatics” widely known as “fluid power systems” operating with mineral oils (or water based fluids) or with air as energy vectors in order to transfer mechanical energy from a source like a pump to an actuator which returns a large part of the mechanical energy absorbed.
Course contents
Introduction on Fluid Power and application fields. Recall of fundamentals of fluid mechanics and Fluid properties.
ISO 1219 standard for fluid power systems and components.
Hydraulic pumps general properties.
Volumetric internal and external gear pumps. Instantaneous flow with energy approach. Radial load.
Vane pumps: fixed and variable displacement pumps.
Axial and radial piston pumps.
Hydraulic and pneumatic cylinders. Linear and part-turns actuators.
Hydraulic motors.
Directional control valves. Spool valve central positions. Spool lap conditions. Valve control: mechanical and solenoid valve. Two-stage (indirectly operated) valves.
Under lap, zero lap and over lap spool-valve static characteristics.
Spool valve and hydraulic motor dynamic transfer function. Power steering.
Pressure control valves.
Flow control valves. Meter-in, meter-out, bleed-off.
Multi actuators operating in series and in parallel.
Readings/Bibliography
Mannesmann, Rexroth, Manuale di oleodinamica (il) volume 1: fondamenti e componenti oleodinamici ristampa 1990, Mannesmann-Rexroth GmbH 0-8023-0619-8, 1990
Assofluid. Hydraulics in industrial and mobile applications. Milano 2007
Belladonna U. Elementi di Oleodinamica. Principi – componenti-impianti, Hoepli, Torino, 2001
Belladonna U., Mombelli A. Pneumatica, Hoepli, Torino, 2001
G. Bacchielli, F. Danielli, S. Sandrolini. Dinamica e controllo delle macchine a fluido. Pitagora, Bologna
Mannesmann, Rexroth, Manuale di pneumatica (il) volume 1: Fondamenti di pneumatica, ed. RI 00 296/10.90, Mannesmann-Rexroth GmbH, 1991
Teaching methods
Class Lectures on the Course contents.
Assessment methods
Oral exam.
The questions are aimed at the following learning outcomes:
knowledge of the main fluid power systems, components and design characteristics.
Higher grades will be awarded to students who demonstrate an organic understanding of the subject, a high ability for critical application, and a clear and concise presentation of the contents.
To obtain a passing grade, students are required to at least demonstrate a knowledge of the key concepts of the subject, some ability for critical application, and a comprehensible use of technical language.
A failing grade will be awarded if the student shows knowledge gaps in key-concepts of the subject, inappropriate use of language, and/or logic failures in the analysis of the subject.
Teaching tools
The use of overhead projector and pc is considered in order to show the case of complex layouts of the plants and energy systems related with the course contents.
Office hours
See the website of Andrea De Pascale