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Sistemi Oleodinamici e Pneumatici
Hydraulic and pneumatic systems
Leonardo Pelagalli

Seat Ingegneria
A.A. 2016/2017
Credits 6
Hours 48
Period II
Language ENG

Prerequisites
Concepts of Machines and Energetic Systems, Applied Mechanics to Machines

Learning outcomes
KNOWLEDGE AND UNDERSTANDING:
The course provides students with an advanced knowledge of the main components of oleodynamic and pneumatic systems. Students deepen their knowledge in the field of transmission of mechanical energy by means of fluid-dynamic circuits
CAPACITY TO APPLY KNOWLEDGE AND UNDERSTANDING:
Students must be able to understand both the operation and the potentiality of an oleodynamic/pneumatic circuit and to assess the benefit of applying a component/systems in relation to the final use context. The main skills acquired in the course are: 1. Ability to plan all the steps for the modeling and the design of an oleodynamic/pneumatic circuit; 2. Ability to assess the performance of an oleodynamic/pneumatic circuit; 3. Ability to properly choose the components of an oleodynamic/pneumatic circuit in relation to the application context
TRANSVERSAL SKILLS:
The knowledge in the field of oleodynamic/pneumatic circuits will improve the ability of students to develop autonomous judgement during the design phase so that they can be able to discuss with specialists with different expertise

Program
General principles. Hydraulic energy transmission. Head and fluid loss. Hydraulic fluid classification. Physical and chemical characteristics. Graphic symbols and standardisation. Hydraulic open and closed circuits. Pumps and engines with pistons, blades, gears. Hydraulic jacks. Geometrical displacement. Formulas for performances computation. Pressure regulation valves. Pressure reduction valves. Sequential valves. Flow regulation valves. Flow limitation valves. Flow dividers. Overcenter valves. Direction regulation valves. Non-reversal valves. Rotary and case distributors. Feeding groups. Utilizing groups. Parallel, in series and mixed circuits. Circuits for sequences. Hydrostatic transmissions. Load sensing systems. Fitting elements for circuits. Compressors. Compressor and tank choice. Pneumatic jacks and hammers. Pressure, flow, direction regulation valves.

Development of the examination
LEARNING EVALUATION METHODS
The assessment of the level of learning and understanding consists of two parts: 1 - written test containing four questions related to the topics covered in the lectures 2 - oral clarification and/or deepening of the themes of the written test, if necessary, by adding an additional problem of theoretical and/or application nature.

LEARNING EVALUATION CRITERIA
The student has to demonstrate to have understood and acquired the physical principles and theoretical considerations on the basis of configurations and running of components and plants in the oleodynamic and pneumatic technical sectors. The responses also include the quantitative knowledge of the topic.

LEARNING MEASUREMENT CRITERIA
The student knowledge is graded through the attribution of a final mark out of thirty. The passing score is 18/30, the highest score is 30/30, brilliant students may receive in addition a praise. The final evaluation results from the weighted average of the pre-trial written examination (25%) and oral (75%). To pass the exam both tests should be sufficient.

FINAL MARK ALLOCATION CRITERIA
In order that the final outcome of the evaluation is positive, the student will have to prove that he has no gaps on basic skills covered in the course. The highest rating is achieved by demonstrating in-depth knowledge of the course content. Praise is given to students who, having done the pre-exam and oral fairly and with good level of detail, have also shown a particular brilliance in exposure and/or have demonstrated particular mastery of the material knowing also the use of the acquired skills to analyze topics not explicitly covered or treating the topics in a way alternative to the proposed one.

Recommended reading
- Lecturer's notes - Speich H., Bucciarelli, A. Manuale di Oleodinamica-Principi, Componenti, Circuiti, Applicazioni,Tecniche Nuove - Nervegna N., Oleodinamica e Pneumatica - Sistemi Vol.1, Politeko - Nervegna N., Oleodinamica e Pneumatica – Componenti Vol.2, Politeko - Belladonna U., Elementi di Oleodinamica - Principi, Componenti, Impianti, Hoepli

Courses

• Ingegneria Meccanica (Corso di Laurea Magistrale (DM 270/04))