LV EN RU DE FR

Hydraulics and Pneumatics IB

Course developer

Course abstract

The aim of the study course is, according to fluid mechanics, to clarify the rules of balance and motion and the forces acting in the fluid and gas, the flow regimes, the structure of hydrostatic, hydrodynamic, hydraulic and pneumatic machines, principles of operation, parameters and operating conditions. In the studies master the methods of calculation of hydraulic and pneumatic systems. Theoretically and practically master the control systems and control possibilities of hydraulic and pneumatic equipment.

Learning outcomes and their assessment

Knowledge - Understanding the basic laws of fluid mechanics, the structure and operation of static and dynamic hydraulic and pneumatic equipment and machines, the construction and operation of pumps and compressors together with the pipeline - Home works.
Skills - Able to evaluate fluids balance and motion laws from engineering perspective, operating in fluid-filled tanks and pipelines and openings through which discharge occurs according to motion mode - Laboratory works.

Competence - can select the appropriate hydraulic equipment for certain operating conditions, design elements of tank, nozzle and water supply systems - Laboratory works.

Course Content(Calendar)

1. Main physical properties of fluids. 2h
2. Hydrostatic pressure and its properties. 2h
3. Compilation of the hydrostatic equilibrium differential equation. 2h
4. Basic equations for hydrostatics. 2h
5. Atmospheric, absolute, pressure gauge and vacuum pressure. Laboratory work: Pressure measurement. 2h
6. Fluid pressure on the surface. 2h
7. Hydraulic press and multiplier for pressure. 2h
8. Fluid Movement Types. Reynolds Number. Laboratory Work: Reynolds Number determination. 2h
9. Bernoulli equation for real fluid flow. 2h
10. Energy losses in pipelines. Laboratory work: Measurement of energy losses. 2h
11. Fluid outlet through openings. 2h
12. Fluid static and dynamic machines. 2h
13. Pump General Operating Scheme. 2h
14. Pump power and efficiency ratio. 2h
15. Determining the main parameters of the centrifugal pump. Laboratory work: Pump characteristics. 2h

16. Hydrodynamic transmissions. 2h

Requirements for awarding credit points

Test. The test consists of: developed and successfully defended laboratory works and performed homework.

Description of the organization and tasks of students’ independent work

1. Homework. Venturi nozzle calculation - 12 h.
2. Homework. Centrifugal pump selection and pipeline calculation - 12 h.

3. Laboratory data processing - 24 h.

Criteria for Evaluating Learning Outcomes

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.
Homework is credited if the student is able to explain the calculations done in it.

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. International Journal of Fluid Power Published by Fluid Power Net International (FPNI). ISSN: 1439-9776.
Pieejams: http://journal.fluid.power.net/index 1.html

2. Fluid Power Journal ISSN: 1073-7898. Pieejams: http://fluidpowerjournal.com

Notes

The study course is included in the compulsory part of the Bachelor’s study program "Biosystems Machinery and Technologies". 1st study year 2nd semester.