OIL HYDRAULIC SYSTEMS
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- Versione italiana
- Academic year
- 2018/2019
- Teacher
- MASSIMO MARTELLI
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- ING-IND/08
Training objectives
- Fluid power is a multidisciplinary subject integrating elements of mechanics, fluid-dynamics and control systems. Furthermore, fluid power is one of the basic technologies for power transmission and it is applied to countless fields, from automotive to earth-moving, agricultural and lifting or special machines, from aerospace to naval applications, to fixed applications such as automatic manufacturing machines.
The objective of the course is to provide the competence in the architectures and operating principles of hydraulic systems, providing both the base knowledge of hydraulic components and the design principles for hydraulic control architectures (circuits). This expertise is aimed at providing the necessary competence to break into the production world, especially in the above mentioned fields. Prerequisites
- To undertake the course it is highly recommended to have attended and gained understanding of the topics covered in the courses of "Fisica Tecnica" and "Macchine".
Course programme
- The topics covered in the classroom lectures are the following:
- Introduction to fluid power; Main parameters for hydraulic power transmission; Equations and basic principles of fluid power; Nomenclature and symbols.
- Introduction to basic components; Volumetric components (pumps and motors, cylinders); Valves.
- Supply groups; Single/multiple pump groups; Pressure and flow control valves.
- Rotational (hydraulic motors) and linear (cylinders) actuation systems; Braking circuits; Overcentre valves.
- Load sensing circuits; Multiple actuators; Flow sharing architectures.
- Hydrostatic transmissions (closed circuit).
- Flow forces; Axial and radial balance of spool valves.
- Hydraulic fluids; Hydraulic piping; Filtration.
- Modelling hydraulic components and systems; Power Port method; Introduction to the Amesim simulation environment. Didactic methods
- The course is composed of 60 hours of classroom teaching, split between lectures and practical exercises.
Subject to availability, lectures could be complemented by a 2-hour seminar by an industry professional. Learning assessment procedures
- The final test is an oral exam to verify the level of achievement of the above mentioned educational objectives.
Reference texts
- Recommended texts:
- G. Luca Zarotti; Circuiti oleodinamici – Nozioni e lineamenti introduttivi; CNR Edizioni; 2013; ISBN 9788880801078
- John Watton; Fundamentals of Fluid Power Control; Cambridge University Press; 2014; ISBN 9781107670181
Consultation texts:
- Hanno Speich,¿ Aurelio Bucciarelli; Manuale di oleodinamica. Principi, componenti, circuiti, applicazioni; Tecniche Nuove; 2002; ISBN 9788848110426
- Herbert E. Merritt; Hydraulic Control Systems; John Wiley & Sons; 1967
- John F. Blackburn, Gerhard Reethof, J. Lowen Shearer; Fluid Power Control; The Technology Press of M.I.T. and John Wiley & Sons; 1960; ISBN 9780262020060
- Russell W. Henke; Sistemi e circuiti oleodinamici; Tecniche Nuove; 1985; ISBN 9788870811384
Other teaching material:
Notes from previous fluid power courses, "Appunti dal Corso di Oleodinamica" by R. Paoluzzi, G.L. Zarotti, are available in pdf format at www.imamoter.cnr.it/sist_oleo.php
