Course code LauZ4066

Credit points 3

Hydraulics and Hidraulic Drive I

Total Hours in Course81

Number of hours for lectures16

Number of hours for seminars and practical classes8

Number of hours for laboratory classes8

Independent study hours49

Date of course confirmation19.10.2011

Responsible UnitInstitute of Mechanics and Design

Course developer

author Mehānikas un dizaina institūts

Ēriks Kronbergs

Dr. sc. ing.

Replaced course

LauZ4192 [GLAU4192] Hydraulics and Pneumatics I

Course abstract

The aim of the study course finds out the balance of active forces in the liquid, and it movement laws, flow regimes, hydrostatic and hydrodynamic machines, their operating principles, parameters and operating conditions, based on the basic rules of mechanics. Students will study the methods of calculation of hydraulic systems. Theoretically and practically acquire equipment management systems and control possibilities.

Learning outcomes and their assessment

Knowledge - understands the basic rules of fluid mechanics, static and dynamic hydraulic equipment and machinery construction and operating principles, structural design of pumps and operation with pipelines - tests 1 and 2.
Skills - is able to assess the laws of balance and movement of the fleet from the engineering point of view, which operate in tanks filled with fluids and in pipelines and openings through which discharge takes place according to the mode of movement - Laboratory works.

Competence - is able to choose the relevant hydraulic equipment for certain conditions of operation, design elements of receptacles, nozzles and water supply systems - Laboratory works.

Course Content(Calendar)

1. Subject of Hydraulics, research methods. Hydraulic pressure. Lecture 1h.
2. Basic equations for hydrostatics. Hydrostatic pressure calculation.
Test 1: Pressure calculation in the system. Lecture 2h, Lab 2h, Pract. 2h.
3. Compressive force on a flat surface. Lecture 1h.
4. Compressive force on curved surface. Lecture 1h.
5. Liquid relative balance. Body swimming. Lecture 1h.
6. Fluid movement elements of the liquid. Lecture 1h.
7. Bernoulli equation. Test 2: Bernoulli equation applications. Lecture 2h, Pract. 2h.
8. Reynolds Criterion. Loss of energy through the pipe length. Lecture 1h, Lab 2h.
9. Energy loss on local resistance. Lecture 1h.
10. Pipeline calculation. Lecture 1h, Lab 2h, Pract. 2h.
11. Exhaust through holes and nozzles. Lecture 1h.
12. Hydraulic surge in the pipelines. Lecture 1h.
13. Pressure pumps, their structure and operation. Lecture 1h.

14. Pump lifting height and power. Lecture 1h, Lab 2h, Pract. 2h.

Requirements for awarding credit points

Test. The test consists of:
• developed and successfully defended laboratory works;
• successfully passed the tests 1. and 2.

All tests and lab works must be completed.

Description of the organization and tasks of students’ independent work

1. Acquisition of pressure calculation methods in preparation for test 1. - 14 h.
2. Application of the Bernoulli equation in preparation for test 2. - 14 h.

3. Data processing of laboratory works - 24 h.

Criteria for Evaluating Learning Outcomes

A student receives a successful markt for the test if the calculation method has been mastered and result is obtained.
The student successfully defends the laboratory work, if he has made the necessary calculations and is able to answer any control question for the job.

Compulsory reading

1. Lielpēters P., Dorošenko R., Geriņš Ē. Fluidtehnika. Rīga, 2005. 183 lpp.

2. Birzietis G., Kaķītis A., Kronbergs Ē., Mežs A., Vizbulis J. Lauksaimniecības hidraulika. Uzdevumi. [B.v.: b.i., 2002]. 64 lpp.

Further reading

1. Kronbergs Ē. Hidraulika un hidropiedziņa. Metodiskie norādījumi. Jelgava, 2015. 82 lpp.

2. Merkle D., Štraiders B., Toms M. Hidraulika: pamatlīmenis. Apz. D. LB. - TP 501 - LV4. izdevums 01/92. 2001. 283 lpp. Rīga: Festo, 2000.

Periodicals and other sources

1. Fluid Power Journal ISSN: 1073-7898. Pieejams arī:


The study course is compulsory for the academic bachelor's degree program in Agricultural Engineering of Faculty of Engineering for full-time and part-time studies. 2nd study year 4th semester.