338-0534/04 – Hydraulics of Working and Production Machines (HPaVS)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 4 |
| Subject guarantor | doc. Dr. Ing. Lumír Hružík | Subject version guarantor | doc. Dr. Ing. Lumír Hružík |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2020/2021 | Year of cancellation | |
| Intended for the faculties | FS | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Students in the course apply knowledge of the subject Hydraulic elements and systems and applies them to the hydraulic systems of working and production machines. Students will learn the function of selected working and production machines and will be able to design a hydraulic drive or transmission. They can analyze the characteristics and behavior of the machine and drive and design or modify its control according to the requirements of the assignment. They will get acquainted with specific problems of individual machines and their drives, such as mobile machinery chassis drives, hydrostatic transmissions of mobile machines, drives of mobile working machines superstructure, energy-saving hydrostatic systems, accumulator systems, emulsion and water hydraulics etc.
Teaching methods
Lectures
Tutorials
Project work
Summary
In the course Hydraulics of Working and Production Machinesthe students will get acquainted with hydraulic systems of mobile working machines and with selected special problems of hydraulic systems of production machines. These include, for example, mobile machinery chassis drives, mobile machinery hydrostatic transmissions, mobile working machine superstructure drives, energy-saving hydrostatic systems, accumulator systems, emulsion and water hydraulics, etc.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
Pro udělení klasifikovaného zápočtu musejí studenti během semestru vypracovat tři programy, které jsou hodnoceny následně: 1. program max. 34 bodů, 2. program max. 33 bodů, 3. program max. 33 bodů. Podmínkou udělení zápočtu je odevzdání všech programů, přičemž každý musí být vypracován tak, aby hodnocení nebylo horší než 10 bodů.
E-learning
Other requirements
Additional requirements for the student are not.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Application of hydrostatic drives and transmissions in mobile working machines. Specific requirements for hydraulic mobile machines (excavators, loaders, dozers, road machinery, building machines), etc.
2. Mobile machine drive. Drive structure. Internal combustion engine: design, control, characteristics.
3. Torque characteristics of drives and working mechanisms. Operating point of drive. Starting of the drive.
4. Hydrostatic transmission. Control of the hydrostatic transmission. Characteristics of the hydrostatic transmission. Problems of filtration and cooling.
5. Multi-motor drives of mobile machines. Implementation of differential functions with parallel motors. Control of driving direction. Mechanic and electro-hydraulic power steering.
6. Hydrostatic drive of upper construction of mobile machinery. Proportional valves for mobile equipment. Compensation of load with pressure weights.
7. Energy-saving drives. Load-sensing systems with open center and closed center.
8. Hydraulic presses. Drives with accumulator. Applications in presses.
9. Electro-hydraulic actuators of robots and manipulators. Speed and positional servodrives in robots, manipulators, machine tools, aircraft, military equipment.
10. Synchronous operation of two or more motors. Application: waterworks, stage equipment, lifting equipment.
11. Hydraulics in the mines. Specific requirements for emulsion and water hydraulics.
12. Hydraulics in steelworks. Electro-hydraulic automatic gauge control on rolling mills.
13. Hydraulics in cars: hydraulic brake, hydraulic transmissions, hydraulic shock absorbers, anti-slip ABS systems.
14. Hydraulic equipment operating in potentially explosive atmospheres. Intrinsically safe controls and drives.
Syllabus of practicals:
1. Repetition: Graphical symbols for hydraulic components. Basic hydraulic circuits.
2. Properties of hydraulic circuits working fluids: viscosity, compressibility. Choice of working fluid.
3. Design and calculation of the hydraulic circuit with consideration of pressure losses and efficiency.
4. Torque characteristics of actuators, mechanisms, choice of working point.
5. Design and calculation of the hydrostatic transmission.
6. Multi motor drives. Synchronous operation of two or more motors.
7. Program No. 1: Design of driving mechanisms of mobile machines.
8. Program No. 2: Design of hydrostatic drive of upper construction of mobile machinery.
9. Energy-efficient regulatory system with LS oil delivering. Design, calculation.
10. Energy-efficient regulatory system with LS system oil delivering.
11. Program No. 3: Hydrostatic drive with accumulators.
12. Circuit design with built-in valves.
13. The dynamics of hydraulic drive system - the machine.
14. Position servo control for rolling mill quarto. Credit.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction