338-0302/04 – Fluid Mechanisms (TMech)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 5 |
| Subject guarantor | doc. Dr. Ing. Lumír Hružík | Subject version guarantor | doc. Ing. Marian Bojko, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 2 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2008/2009 | Year of cancellation | 2020/2021 |
| Intended for the faculties | USP, FS | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
Students will learn the basic concepts of fluid mechanisms: hydraulic mechanism, pneumatic mechanisms, hydraulic and pneumatic circuit. Become familiar with the composition of hydraulic and pneumatic circuits, basic hydraulic and pneumatic components, their functions, structures, characteristics using the circuit. Students will learn to count instances hydraulic and pneumatic circuits in steady state and solve the starting and braking hydraulic actuators. Learn to design simple hydraulic and pneumatic circuits and compile them on trainer in the laboratory. Students acquire basic knowledge of the operation, maintenance, measurement and diagnostics of hydraulic and pneumatic equipment.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Project work
Summary
In the subject "Fluid Mechanisms", students deal with function, structure, properties and applications of fluid, i.e. hydraulic and pneumatic mechanisms. The subject is divided into the following sections: general introduction, basic calculations of fluid mechanisms, elements of fluid systems, their construction, functions and characteristics, hydraulic and pneumatic drives and transmissions, including ways of their control, application of fluid mechanisms. The exercise is focused on calculations of fluid mechanisms and laboratory measurements.
Compulsory literature:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
1 písemný test
1 laboratorní úloha
2 programy
E-learning
MC - eLEARNING. available from http://smctraining.mrooms.net/ (username and password will be assigned by teacher, Pneumatic Systems module, Hydraulics module)
Other requirements
There are no other requirements for student. .
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Week Lectures
1. Fluid mechanism, fluid power, fluid circuit. Hydraulic and pneumatic circuit: structure, graphics symbols of elements, circuit scheme. Basic hydraulic and pneumatic circuits.
2. Hydraulic fluids: properties, types and applications. Compressed air and its properties.
3. Pressure energy sources - pumps: structure, function, parameters, characteristics, control.
4. Hydraulic motors: structure, function, parameters. Hydraulic cylinder, seals.
5 Compressors and pneumatic motors.
6. Directional control valves. Check valves. Flow conrol valves. Pressure control valves.
7. Flow control valves.
8. Pressure control valves.
9. Proportional control technology, application of proportional control technology.
10. Introduction to servo technology, servo technology applications.
11 Accessories of hydraulic and pneumatic circuits: accumulators, filters, pipes, hoses, tanks, coolers, etc.
12. Hydraulic drive: power structure, steady-state drive, acceleration and braking operation.
13. Control of hydraulic drive: ventil control, volume control. Hydrostatic transmission.
14 Basic operation and service of hydraulic and pneumatic systems. Fault diagnosis, fault prevention. Proactive service.
Week Filling of exercises and seminars
1. Fluid mechanism: applications. Video film.
2. Graphic symbols of the elements.
3. Project of graphical symbols of elements, synthesis of simple hydraulic circuits.
4. Basic hydraulic circuits: demonstration on the trainer. TEST number 1: Graphic symbols of the elements. Basic relationship from fluid mechanics. The test may receive up to 10 points.
5. Hydraulic fluids: examples on the viscosity and compressibility. Hydrostatic converters: examples of the basic relationships between the parameters hydrostatic converters. Efficiency.
6. Project No. 1. Design of a hydraulic circuit including the specification elements. The project can receive up to 10 points.
7. Calculation of parameters of the hydraulic circuit in the steady state with efficiency. Exercise No. 1: Measurement p-Q pump characteristics. Determination of the flow efficiency. The project can receive up to 5 points. Demonstration of a geometric control volume pump.
8. Hydraulic cylinder: practice the basic relations. Design of hydraulic cylinder. Seals of hydraulic cylinder.
9. Acceleration and braking of the hydraulic motor with load.
10. Control the hydro motor by control valves. Design, calculation. Demonstration of the trainer. Measurement of characteristics of the throttle valve.
11. Hydraulic calculation of pipe: friction pressure loss in piping and hoses. Pressure losses in piping and their local measurements. Measurement p-Q characteristics of hydraulic components.
12. Proposal hydrostatic transmission.
13. Project No. 2. Composition of pneumatic circuits - use of trainer. Task 4: To meet the job can receive up to 10 points.
14. Design and calculation of accumulator. Credit.
Questions to exam
1. Hydraulic fluids: physical properties, lubrication ability, chemical properties.
2. Hydraulic fluids: mineral oil, hardly inflammable liquids, organic liquids.
3. Hydrostatic converters: definition, characteristic parameters efficiency, static characteristics.
4. Hydrostatic converters: gear, vane, screw.
5. Hydrostatic radial and axial piston converters.
6. Control of the geometric volume of hydrostatic converters. Control on the constant pressure and constant power.
7. Linear hydro motors: design, calculation, production technology.
8. Angle rotary motors. Hydraulic power units. Multipliers of pressure.
9. Seal in hydraulics.
10. Directional control valves.
11. Check valves.
12. Throttle-valves. Flow control valves.
13. Pressure control valves.
14. Hydraulic accumulators and their use in circuits.
15. Proportional technology.
16. Servo technology.
17. Filters and filtration technology.
18. Pipes, hoses, fittings. Calculation of pressure losses in piping and fittings.
19. Hydraulic drive: structure of drive, steady-state drive.
20. Acceleration and braking of drive.
21. Hydraulic circuits open and closed.
22. Valve control of hydraulic drive.
23. Volume control of drive. Hydrostatic converters.
24. Pneumatic drives: sources, distribution and compressed air.
25. Pneumatic motor: structure, characteristics, control.
26. Thermal calculation of the hydraulic circuit.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction