Course detail

Earth Working Machinery

FSI-QZEAcad. year: 2024/2025

The course is to acquaint students with the technology of road construction and machinery used in their construction as a machine for plating, compaction mechanisms, machines for construction of concrete and asphalt roads and their construction design.

Language of instruction

Czech

Number of ECTS credits

3

Mode of study

Not applicable.

Guarantor

Ing. Jaroslav Kašpárek, Ph.D.

Department

Institute of Automotive Engineering (ÚADI)

Entry knowledge

Successful completion of the course is conditional on the basic knowledge of technical mechanics, physics and higher mathematics.

Rules for evaluation and completion of the course

Classification and assessment of the student credit: Excellent (90-100 points), very good (80-89 points), good (70-79 points), satisfactory (60-69 points), sufficient (50-59 points), failed (0-49 points).
Course-unit credit is awarded on condition of having attended the exercises actively and worked out assigned projects. Presence in the exercises is obligatory.

Aims

The aim and task of the course is to acquaint students with the design layout and main technical parameters of compaction machinery, construction machinery for asphalt and concrete roads, machinery for the repair of roads and automation of machinery for road construction. Acquainted with the principles of design and planning in respect of technology and technical requirements.
Students will be able to choose the concept of meeting the technological and technical equipment requirements, specify the main components and machine projection addressed. It is able to propose optimal technological assembly machinery to build roads on the basis of their technical parameters and options.

Study aids

The study documents are listed in the e-learning support of the course.

Prerequisites and corequisites

Not applicable.

Basic literature

VANĚK, Antonín. Moderní strojní technika a technologie zemních prací. Praha: Academia, 2003. Česká matice technická (Academia). ISBN 8020010459. (CS)
Nichols, H. L. - Day D. A.: Moving The Earth: The Workbook of Excavation, Sixth Edition, McGraw-Hill Professional; 6 edition 2010, ISBN 978-0071502672 (EN)
MAZURKIEVIČ, Izidor, Ladislav GULAN a Gregor IZRAEL. Mobilné pracovné stroje: teória a konštrukcia základných modulov. Bratislava: Slovenská technická univerzita v Bratislave, 2013. Edícia vysokoškolských učebníc. ISBN 978-80-227-3968-9. (SK)
MARŠÁL, Petr. Stavební stroje. Brno: Akademické nakladatelství CERM, 2004. ISBN isbn:80-214-2774-4. (CS)

Recommended reading

Nichols, H. L. - Day D. A.: Moving The Earth: The Workbook of Excavation, Sixth Edition, McGraw-Hill Professional; 6 edition 2010, ISBN 978-0071502672
Vaněk, A.: Moderní strojní technika a technologie zemních prací, vyd. Acamedia, Praha, ISBN 80-200-1045-9, 2003

Classification of course in study plans

  • Programme N-ADI-P Master's, 1. year of study, summer semester, compulsory-optional

Type of course unit

 

Lecture

39 hours, optionally

Teacher / Lecturer

Ing. Jaroslav Kašpárek, Ph.D.

Syllabus

1. Technology of the earth work, classification of the earthmoving machines.
2. Main assembly groups of the machines.
3. Technical properties of a soil.
4. Methods of a soil disintegration and their energy demands.
5. Modeling of soil uncoupling with a working tool and numerical simulation of the solution using DEM analyses.
6. Force effects between the soil and tool.
7. Engine devices of the earthmoving machines, determination of an engine power.
8. Hydrostatic system, hydrodynamic system.
9. Hydraulic system of the earthmoving machines.
10.Chassis of the earthmoving machines.
11. Transmission of the forces between the earthmoving machine chassis and soil.
12. Hydrostatic servo-mechanism of the earthmoving machines.
13. Brake system of the earthmoving machines, cooling system of the earthmoving machines.

Exercise

13 hours, compulsory

Teacher / Lecturer

Ing. Jaroslav Kašpárek, Ph.D.

Syllabus

1. Technical assignment and development of the wheel loader.
2. Determination of the climatic variant marking of the multipurpose front loader for an area of the expected purpose.
3. Determination of the technical properties of a soil.
4. Calculation of the working machines resistances.
5. Modelling of soil disconnection with a working tool (shovel) using Altair's EDEM software.
6. Modelling of soil disconnection with a working tool (dozer ripper) using Altair's EDEM software.
7. Evaluation of the cooperation between combustion engine and moment converter and calculation of the moving forces and machine speed. Evaluation of an earthmoving machine engine power.
8. Design of the hydraulic generators for the working hydraulic circuits.
9. Calculation of the joint loading bearings of the wheel loader chassis.
10. Calculation of the steering moment and speed-torque characteristic of the wheel loader with the joint frame.
11. Calculation of the movement resistances of the tracked chassis of the excavator. Design of a hydraulic generator for the servo-mechanism circuit.
12. Calculation of the loader brakes.
13. Calculation of the loss and heat formation in circuit of the working hydraulics and servo-mechanism, evaluation of the hydraulic circuit cooling of an earthmoving machine.