Il modulo presenta e considera componenti e sistemi oleodinamici di base in termini di architettura, caratteristiche specifiche, realizzazioni costruttive e funzionamento. Vengono introdotte le condizioni di non-idealità dei componenti, le loro caratteristiche e prestazioni. Le macchine volumetriche, nelle varie soluzioni costruttive, vengono studiate in termini di rendimenti, oscillazioni della portata e coppia istantanee e degli aspetti legati alla distribuzione. Il modulo si concentra quindi sullo studio di attuatori lineari e rotativi, sistemi di generazione della portata, accumulatori e valvole presentandone principi e soluzioni costruttive. Gli studenti apprendono le modalità di identificazione e di interpretazione dei circuiti oleodinamici, e spiegano il loro scopo con riguardo ai componenti costitutivi. Le considerazioni teoriche vengono integrate da applicazioni di Simulazione. Obiettivo primario del Corso è quello di presentare agli allievi i metodi per l'analisi e la valutazione critica di componenti e sistemi oleodinamici.

Al completamento del Corso gli allievi devono essere in grado di identificare i principali componenti oleodinamici, la loro funzione specifica nonchè il loro funzionamento, interpretare correttamente il loro scopo nel contesto di un sistema oleodinamico e determinare e confrontare da un punto di vista tecnico l'uso di un componente o di un intero sistema in relazione agli usi finali

Sono necessarie le conoscenze derivanti dai Corsi che trattano la Fisica, la Meccanica dei Fluidi e la Modellazione 3D.

LECTURES PROGRAMME
The programme addresses the analysis of flow generation units, control and utilisation of hydraulic power and of auxiliary components.
Positive displacement pumps and motors: ideal and real characteristics, instantaneous flow rate and torque, volumetric and mechanical-hydraulic efficiencies, flow and torque losses models. Controls for displacement variation.
Fluid Power valves: on-off directional control valves; flow and pressure control valves, single and double stage; ideal and real performance characteristics.
Accumulators: types and their dimensioning criteria.
Flow Generation units: constant and variable flow rate; constant and approximate pressure, open and closed circuits; ideal and real performance characteristics.
Users groups: mechanical characteristic of linear and rotary actuators. Control of overrunning loads by means of counterbalance and overcentre valves. Flow regeneration in differential actuators. Synchronous movement of two linear actuators by means of a flow divider/combiner. Speed control of a hydraulic motors with flow control valves (meter-in, meter-out, by-pass). Variable displacement motors. Hydraulic transformers.

LABORATORY WORK PROGRAMME
Four sessions of laboratory work are carried out in teams:
• Pumps, motors and linear actuators: various positive displacement pumps (external and internal gear, piston and vane) and motors of different manufacturers are disassembled, analysed and contrasted to understand and appraise their peculiarities and mode of operation.
• Fluid Power valves: various valves are disassembled and analysed.
• Didactic test rig: students can analyse different circuits and components. Interactions and characteristics of valves and actuators are appraised: the practical settings of relief, reducing and sequence valves, implications in series and parallel operation of linear actuators, velocity control of rotary motors with constant and variable loads via variable restrictors and flow control valves.
• Load test rig: the test rig reproduces the circuit of a hydraulic winch. It includes an orbital motor integrating a holding brake and an overcentre valve. Inertial, resistive and overrunning loads can be simulated.

A written report about one of the laboratory topics must be prepared and presented at the examination.

Will be made available only to enrolled students at the Didactic Web site of the Politecnico.
The entire content of slides used in lectures is also made available in printed form:
- Nervegna, N., Rundo, M.: Fluid Power I, Politeko, Torino
For additional insight into specific topics reference is made to the following material (in Italian):
- Nervegna, N.: Oleodinamica e pneumatica: Sistemi. Vol. 1, Politeko, Torino
- Nervegna, N.: Oleodinamica e pneumatica: Componenti. Vol. 2, Politeko, Torino
- Nervegna, N.: Oleodinamica e pneumatica: Esercitazioni. Vol. 3, Politeko, Torino
- Gilardino, L.: Esercizi di Oleodinamica, Clut, Torino
- Fluid Power Laboratory web site: http://www.fprl.polito.it

During the course 5 numerical exercises will be progressively proposed on the specific didactic web portal of the Politecnico. This homework must be downloaded and solved individually, according to explicit rules, by all students. The purpose of the homework is twofold: a self-assessment of acquired knowledge and competence; a training route toward the final written test. When successfully registering the exam, students must hand in the complete set of their own homework.
At the end of the module the final exam is grounded on a two-hour written test involving practical numerical evaluations on a proposed problem as well as questions on concepts and principles exposed during the lectures.
For those who reach in the written test marks in the range:
• below 15/30 the exam is failed,
• from 15 to 20/30 an additional oral examination is required,
• above 20 /30 the oral examination is optional.
Final mark will be the average between oral and written exams.
The oral examination focuses on lectures, classroom work, laboratory topics, written test and homework.