LV EN RU DE FR

Hydraulics and Hydraulic Drive II

Course developers

Prior knowledge

Meha4008, Theoretical Mechanics I

Meha4009, Theoretical Mechanics II

Course abstract

The aim of the study course acquires the design of the main hydro units, regulating devices, functional significance, operating principles, hydrosystem design skills and calculation methodology in accordance with the technological requirements, based on the basic rules of fluid mechanics.

Learning outcomes and their assessment

Knowledge - understands the structure, operation and applications of static (volumetric) and dynamic hydro devices - Laboratory works.
Skills - oriented in the schematic drawings of hydraulic drive diagrams, assesses the functioning of static and dynamic hydraulic systems, understands the functions, applicability and operation of apparatus used in the scheme, can organize maintenance work - Laboratory works.

Competence - chooses equipment, justifies the choice and designs the hydropower of different machinery and machinery members, and carries out the maintenance of the hydraulic drive for maintenance of non-refractory operation - Homework.

Course Content(Calendar)

1. Types of hydraulic propulsion and control devices for control devices. Lecture 1h.
2. Hydraulic drive breakdown. Lecture 1h.
3. Simple hydraulic drive circuits. Valves. Laboratory work: Valve research. Lecture 1h, Lab 2h.
4. Working fluids, their characteristic, requirements. Lecture 1h.
5. Distributors - structure, tasks, selection of key parameters and calculations. Laboratory work: Direct control valves. Lecture 1h, Lab 1h.
6. Speed control techniques. Lecture 1h.
7. Hydraulic drive analysis depending on the throttle closure diagram. Lecture 1h.
8. Speed controllers, their construction and application. Laboratory work: Throttle regulation. Lecture 1h, Lab 1h.
9. Hydraulic servo systems - manipulators. Lecture 1h.
10. Hydraulic motor synchronization. Lecture 1h, Pract. 2h.
11. Proportional hydraulic drive. Lecture 1h.
12 Analysis of proportional hydraulic drive scheme design, basic calculations of hydraulic drive. Lecture 1h.
13. Choice of pump design for hydraulic drive. Laboratory work: Gear pumps. Laboratory work: Piston pumps. Lecture 1h, Lab 2h.
14. Drive power calculation. Lecture 1h, Pract. 2h.
15. Hydraulic drive diagnostics. Lecture 1h.

16. Basic principles of hydraulic drive design. Laboratory work: Choice of auxiliary equipment. Lecture 1h, Lab 2h, Pract. 4h.

Requirements for awarding credit points

Examination
The student’s exam is arranged after independent work defended and defended all laboratory works.

Description of the organization and tasks of students’ independent work

1. Homework: Hydraulic drive design - 26 h.

2. Laboratory data processing - 26h.

Criteria for Evaluating Learning Outcomes

The examination evaluation includes cumulative assessments of defended homework and defended laboratory works.

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.
3. Mežs. A., Vizbulis J. Tilpuma hidropiedziņa. 1. lekcija. LLU. Jelgava, 2009. 65 lpp.

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

Further reading

1. 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

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

Notes

The study course is included as compulsory part of the academic Agricultural engineering bachelor’s study programme at Faculty of Engineering for full-time and part-time studies. 3rd study year 5th semester.