338-0502/01 – Hydraulic Elements and Systems (HyPrv)

Gurantor departmentDepartment of Hydromechanics and Hydraulic EquipmentCredits4
Subject guarantordoc. Dr. Ing. Lumír HružíkSubject version guarantordoc. Dr. Ing. Lumír Hružík
Study levelundergraduate or graduateRequirementCompulsory
Year1Semestersummer
Study languageCzech
Year of introduction2004/2005Year of cancellation
Intended for the facultiesFSIntended for study typesFollow-up Master
Instruction secured by
LoginNameTuitorTeacher giving lectures
DOB171 Ing. Josef Dobeš
HRU38 doc. Dr. Ing. Lumír Hružík
PAV70 doc. Ing. Bohuslav Pavlok, CSc.
Extent of instruction for forms of study
Form of studyWay of compl.Extent
Full-time Credit and Examination 2+2
Combined Credit and Examination 12+4

Subject aims expressed by acquired skills and competences

Graduates are detailing the functions, design, calculation, properties and use of hydraulic components. It can properly use these elements in hydraulic systems. Broaden their knowledge in the design and calculation of selected hydraulic circuits and systems, especially in terms of their management, energy balance, operation and maintenance, reliability, etc.

Teaching methods

Lectures
Tutorials
Experimental work in labs

Summary

The subject of Hydraulic components and systems, students learn about functions, structure, parameters, characteristics, and using hydraulic calculations elements, the basic theory of hydrostatic systems and the basic types hydraulic circuits. The exercises practiced brand of hydraulic components, measures the static characteristics of hydraulic components and practicing the basics of hydraulic theory systems.

Compulsory literature:

[1] EXNER, H. et al. Basic Principles and Components of Fluid Technology. Lohr am Main, Germany: Rexroth AG., 1991. 344 p. ISBN 3-8023-0266-4. [2] EWALD, R. et al. Proportional and Servo-valve Technology. Lohr am Main, Germany: Bosch Rexroth AG, 2003. 300 p.

Recommended literature:

[1] GÖTZ, W. Hydraulics. Theory and Applications. Ditzingen, Germany: OMEGON, 1998. 291 s. ISBN 3-980-5925-3-7. [3] HEHN, H. et al. Fluid Power Troubleshooting. New York : Marcel Dekker.

Way of continuous check of knowledge in the course of semester

E-learning

Další požadavky na studenta

Additional requirements for the student are not.

Prerequisities

Subject has no prerequisities.

Co-requisities

Subject has no co-requisities.

Subject syllabus:

The program of lectures Week Contents of lectures 1. A hydraulic system: definition, structure and function of the hydraulic circuit. Distribution of hydraulic circuits. Analysis of hydraulic circuits in steady state: circuits with a flow source, circuit with a pressure source. Solution by method of mathematical and physical modeling of R- resistance. 2 Thermal calculation of the hydraulic circuit. Heat conduction and convection. Design of cooler. The basics of hydraulic systems dynamics. 3 Liquids of hydraulic circuits: the types, properties, use. 4 Elements of hydraulic systems: distribution. Hydrostatic transducers gear, flap, ORBIT, screw, Hartmann, plunger, rejoice. 5 Radial and axial piston hydrostatic transducers. Control of hydrostatic transducers at a constant pressure, constant flow, constant performance. Hydraulic aggregates. 6 Rocking motors. Linear motors. Seals in hydraulics. Pressure multipliers. 7 One-way valves. One-sided, double sided hydraulic lock. Filling and vent valves. Shut-off valves. Saddle and spool distributors. 8 Pressure valves: safety, discharge, reduction. Single and multistage. Connecting and disconnecting. Logic built-in valves. 9 Screens and nozzles. Throttle valve pressure-dependent. Throttle valves independent on viscosity. Throttle valves with two-way and three-way pressure weight. Braking valves. Control valve with two and four edgges. 10 Proportional valves and distributors. Servo valves. Servo drivers. 11 Hydraulic accumulators and their use in circuits. 12 Control of hydrostatic drivers: gradual, with change of geom. volume, with variable resistor. Hydrostatic transducer. 13 Circuits with two or more motors. Synchronous running of motors. Circuits for handling with mass loads. 14 Energy-saving systems. Filters and filtration. Pipes, hoses, tanks, heaters, coolers. Program of exercises and seminars + individual students' work Week Content of exercises and seminars 1. Repeating of hydrostatics. The pressure in the liquid. Pressure losses. Flow losses. Calculation of permeability G = 1 / R. 2 Analysis of the ideal hydraulic circuit in the steady state. Program No. 1: Calculation of ideal hydraulic circuit parameters in steady state. Student can receive up to 10 points per program. 3 Calculation of real hydraulic circuit parameters in steady state: - circuits with a source of pressure and flow. 4 R-resistance. Circuits with R - resistors. 5 Calculation of circuit parameters with throttle valves. 6 Thermal calculation of hydraulic circuit. Design of cooler. 7 Starting and stopping of drive. Test 1: Physical properties of liquids. The pressure in the liquid. Pressure and flow losses. Thermal calculation. Student can receive up to 10 points per test. 8 Stiffness of the hydraulic motor. Natural oscillations in the circuit. 9 Program No. 2: Measurement of p-Q characteristics of a gear pump. Determination of flow efficiency, leakage resistance and leakage permeability. Mathematical and physical model of a gear pump. Student can receive up to 6 points per program. Program No. 3: Measurement of pressure-dependent valve. Student can receive up to 6 points per program. 10 Design and calculation of the linear hydraulic motor. Calculation of friction seal. Alternatively, the possibility of excursions. 11 Design of hydraulic circuit with a proportional valve. 12 Calculation of the circuit with accumulator. 13 Design of accumulator. 14 Credits. List of questions to examination 1 Liquids of hydraulic circuit: properties. 2 Liquids of hydraulic circuits: types, use. 3 Hydrostatic transducers: definitions, efficiency, characteristics. 4 Hydrostatic gear transducers. 5 Hydrostatic screw and vane transducers. 6 Hydrostatic radial piston transducers. 7 Hydrostatic axial piston transducers. 8 Control of geometric volume transducers. Constant-pressure control, constant flow control and constant power control. 9 Linear motors: design. 10 Linear motors: technology of production. 11 Seals in hydraulics. 12 Check valves. Controlled check valves. Shut-off valves. 13 Directional control valves. 14 Throttle valves. Braking valves. 15 Pressure control valves. 16 2-way cartridge valves. 17 Proportional technology. 18 Servo technology. 19 Hydraulic accumulators. 20 Purity of liquids. Filters and filtration. 21 Circuits with two or more motors. Synchronous motors running. 22 Circuits for material loads handling. 23 Circuits with accumulators. 24 Valve control of hydrostatic drive. 25 Volume control of hydrostatic drive. Hydrostatic transmission. 26 Thermal calculation of hydraulic circuit.

Conditions for subject completion

Combined form (validity from: 1960/1961 Summer semester, validity until: 2009/2010 Winter semester)
Task nameType of taskMax. number of points
(act. for subtasks)
Min. number of points
Exercises evaluation and Examination Credit and Examination 100 (145) 51
        Examination Examination 100  0
        Exercises evaluation Credit 45  0
Mandatory attendence parzicipation:

Show history

Occurrence in study plans

Academic yearProgrammeField of studySpec.FormStudy language Tut. centreYearWSType of duty
2012/2013 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2012/2013 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2011/2012 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2011/2012 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2010/2011 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2010/2011 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2009/2010 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2009/2010 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2008/2009 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2008/2009 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2007/2008 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2007/2008 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2006/2007 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2006/2007 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2005/2006 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2005/2006 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan
2004/2005 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics P Czech Ostrava 1 Compulsory study plan
2004/2005 (N2301) Mechanical Engineering (3909T001) Design and Process Engineering (16) Hydraulics and Pneumatics K Czech Ostrava 1 Compulsory study plan

Occurrence in special blocks

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