Programme

Course content

Hydraulics
Reference flow conditions in hydraulics
Flow through orifices – The "discharge coefficient CD "
Laminar flows in hydraulic components

Valves
Pressure relief valve
Pressure reducing valve
Flow control valve RQ2 type
Flow control valve RQ3 type
Continuous positioning valves and characteristics
Hydraulic manipulators
Servo and proportional valves
Nozzle-Flapper Servo valves

Actuators
Classification and characteristics and linear and rotary actuators

Pumps
Classification of pumps
Pressure Level
Flow regularity
Variable pump displacement
Considerations on the Cost/Performance ratio

Fluids, accumulators, pipes and hoses
Functions of the fluid in hydraulic systems
Definition and characterization of fluid bulk compressibility
Filtration
Thermal conditioning
Accumulators
Piping

Mechanical and volumetric losses in hydraulic pumps and motors
Wilson’s loss-model

Hydraulic Systems
Fixed flow supply system
Fixed pressure supply system
Hydrostatic transmissions
"Load-sensing" systems
The “Automotive-control” for hydrostatic transmissions

Flow dividers
Continuous positioning flow dividers
Geared dividers
Closed-loop controlled flow dividers

Closed-loop control of linear and rotary actuators
Linearization of hydraulic systems
Characterization of the valves
Canonical characterization of the first and second order systems
PID Industrial controllers
"Valve-controlled" hydraulic systems
"Pump-controlled" hydraulic systems
Hydraulic systems and "mechatronics"

Training on design of hydraulic systems
Design of a hydraulic system and performance simulation under stationary and dynamic conditions in AMESim® environment


Pneumatics
Basics and reference flows in the operation of pneumatic components
Flow through orifices
Charge and discharge of a capacity
Dynamics of pneumatic jacks
Systems for generation and distribution of compressed air, common components
Compressors
Valves
Actuators
Groups for the treatment of compressed air
Demisters
Filters
Generation-Conditioning groups

Functional and logical management of pneumatic systems
Movement-phases diagrams
Grafcet diagrams
Solutions for the control of two or more pneumatic actuators and issues related to the onset of blocking signals
Auxiliary memory
Cascade of memories
Pneumatic sequencers
Relay-based systems
PLC-based systems

Core Documentation

N.NERVEGNA “OLEODINAMICA E PNEUMATICA” ED. POLITEKO, TORINO
-G. BELFORTE, A.M. BERTETTO, L. MAZZA “ PNEUMATICA” ED. TECNICHE NUOVE, MILANO, 2004
-ASSOFLUID “L’OLEOIDRAULICA NELL’AMBITO INDUSTRIALE E MOBILE” ED. ASSOFLUID. MILANO, 2008
-ASSOFLUID “LA PNEUMATICA E LE SUE APPLICAZIONI ..” ED. ASSOFLUID. MILANO, 2002
-N.D. MANRING “HYDRAULIC CONTROL SYSTEMS” ED. JOHN WILEY & SONS, N. JERSEY, 2005
-AKERS, M. GASSMAN E R. SMITH “HYDRAULIC POWER SYSTEM ANALYSIS” ED.TAYLOR & FRANCIS, 2006
-P. BEATER “PNEUMATIC DRIVES” SPRINGER-VERLAG BERLIN 2007

Type of delivery of the course

- Teaching is based on lectures, classroom exercises and experimental demonstration activities conducted in the classroom on components and equipment specially set up for teaching. - The teaching is organized starting from the identification of actual problems in the field of hydraulics and pneumatics (fluid power); the student, faced with the need solve the problems, is guided in the formulation and resolution phases; the student is involved in the development of critical analysis tools and advanced operational skills for the sectors of hydraulics and pneumatics.

Attendance

Course attendance is not mandatory, although assiduous attendance in the classroom is strongly encouraged.

Type of evaluation

- The assessment of learning takes place through an oral exam, divided into several questions aimed at probing the level of skills acquired by the student, both in terms of in-depth study of the different themes, and in terms of completeness of the preparation. - During the oral interview, the candidate has the opportunity to illustrate the activities carried out on a self- developed design activity in the field of fluid-power. - The exam dates will follow the exam schedule of the Teaching College of Mechanical Engineering. For each call on the calendar there will be a preliminary meeting, in which a calendar of oral tests will be defined according to the needs of the students (in terms of dates and time). During covid-19 total or partial lock-down the activities of evaluation will be carried out according to Art.1 - D.R. n. 703/2020