338-0530/01 – Mechanical and Hydraulic Gears (MechaHyPř)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 5 |
| Subject guarantor | doc. Dr. Ing. Lumír Hružík | Subject version guarantor | prof. Ing. Jaroslav Kopáček, CSc. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2004/2005 | Year of cancellation | 2012/2013 |
| Intended for the faculties | FS | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Students will acquaint with the purpose and structure of drives and gears for road and rail vehicles. They analyze the characteristics of the primary driving motors for their use in drives of vehicle travel and for their other functions. They will be able to assess the energy-thermal balance of energy transfer in the drive. They analyze function of the mechanical gear and its components with simple and branched transmission of power. After the division of structure and construction of hydraulic gears, they will acquaint with their components and they will be able to characterize and analyze the energy transfer in hydrostatic and hydrodynamic gear. Students will acquaint with the basic computational methods for design of mechanical and hydraulic gear and they will be able to assess critically their characteristics in the operating mode.
Teaching methods
Lectures
Tutorials
Project work
Summary
Mechanical gears: functions and characteristics at the power transmission, load spectra and methods of durability calculation. Cog-wheels gears for road and rail vehicles, their dimensioning. Shafts, connectors. Operation and maintenance. Hydraulic gears: the division on hydrostatic and hydrodynamic, function, theory, operation characteristics, construction, cooperation with driving motor. Combined gears.
Compulsory literature:
Recommended literature:
[1] GÖTZ, W. Hydraulics. Theory and Applications. Ditzingen, Germany: OMEGON, 1998. 291 s. ISBN 3-980-5925-3-7.
[2] DE, N.K., SEN, P.K. Electric Drives. Applications and Control. Eastern Economy Edition, 2006. 324 p. ISBN: 978-81-203-1492-4.
Additional study materials
Way of continuous check of knowledge in the course of semester
E-learning
Other requirements
There are no other requirements for student.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
The program of lectures
Week Lectures content
1 Purpose and structure of the drive and the transfer of road and rail vehicles. Types
drivers and their characteristics.
2 Energy balance of thermal energy transfer power loss calculation
warming, cooling and refrigeration.
3 Distribution of hydraulic transmission, structure, properties. Fluid
mechanisms, the basic parameters, track circuits and components, fluid
for hydraulic drives.
4 Hydrostatic transmission: Speed and torque, transformation, control
output parameters, efficiency. Combination Hydrostatic-mechanical
transfers.
5 Hydrodynamic transmissions: the distribution, the basic principle of operation, torque
equation. Fluid couplings, torque control options.
Torque converter, characteristics.
6 Cooperation hydrodynamic transmission with driver. Hydrodynamic
brake. Hydrovheels, structure, characteristics.
7 Driving direction: classification, hydraulic mechanical structure
management, fully hydraulic steering, characteristics. Hydrodynamic
high-power transmissions for rail vehicles. The composition, characteristics,
characteristics.
8 The mechanical gears, the balance of power and resistance requirements
mechanical transmissions. Types of gearboxes and reduction.
9 Branching power differentials and axles. Assessment of load drive
system, operating conditions, load spectrum, fatigue characteristics,
method of calculating lifetime.
10 Gears of vehicle propulsion. Types of gears - helical, planetary,
bevel, hypoid. Basic principles of geometry modifications.
11 Stress analysis of gears, gear drives car design.
Security, durability.
12 Shafts, bearings, couplings.
13 Operation, maintenance and lubrication. Quality products.
14 Summary of the course. Consultation.
Program of exercises and seminars + individual students' work
Week Content of exercises and seminars
1 - 3 The following of lectures
4 Tracks and calculation of the hydrostatic transmission drive vehicle. Entering
Program No. 1
5 The following five lectures.
6 Calculation of main dimensions, characteristics, and thermal regime
hydrodynamic coupling. Entering the program No. 2
7 Control test. Consultation.
8 The following lectures.
9 Enter the exercises according to individual content. Dynamic characteristics.
10 - 11 Propose of transfers, the basic calculations.
12 -13 PC work on the program. Excursions to the laboratories of the Department.
14 Finishing the job. Delivery of work. Test.
List of questions to examination
Hydraulic transfers:
No. Wording of the question
1 Structure of a drive vehicle and its individual parts.
2 Direct and indirect transfer and its properties.
3 Basic characteristics of the engine.
4 General characteristics of the motor.
5 Transfer and transformation of energy, power loss, efficiency
6 Basic equations and procedures for warming and cooling.
7 Calculation of cooling.
8 Distribution of hydraulic transmission, structure and properties.
9 Hydrostatic power transmission: basic characteristics, parameters,
track circuit.
10 Basic elements of the hydrostatic circuit, the purpose and function.
11 Construction, characteristics and parameters of flow and hydraulic motors.
12 Hydrostatic transmission: composition, properties, parameters.
13 Torque and Speed of transformation.
14 Control of hydrostatic transmission.
15 Combined Hydrostatic mechanical transmission, and their properties
characteristics.
16 Hydrodynamic power transmission: the distribution and characteristics, parameters.
17 The emergence and transmission of the hydrodynamic torque transfer.
18 Hydrodynamic coupling: the principle of operation, torque equation,
characteristics.
19 Construction of hydrodynamic coupling. The basic calculation.
20 Control of hydrodynamic coupling. Cooperation and clutch motor drive.
21 Hydraulic Brake - retarder: principle of operation, characteristics.
22 Torque converter, principles, basic characteristics.
23 Working points and ranges of hydrodynamic drive.
24 Construction of the inverters and throughput.
25 Hydro-wheels. Co combustion engine hydrodynamic transmission.
26 Meaning and purpose of the power-assisted rudder control. Their division.
27 Monoblock power steering, power steering cylinder with a free, fully hydraulic
Power steering: their composition and properties.
Mechanical transmission:
1 Why is the power rail of a combustion engine ranks
mechanical transfer.
2 The balance of driving forces and resistances. The balance of forces.
3 Dynamic characteristics and speed of vehicles with mechanical transmission.
4 Calculation of total transfer of the desired characteristics of the vehicle: the maximum
speed, economical speed, minimum speed, maximum climb.
5 Branching rolling stock performance.
6 The importance of differential drives in wheeled vehicles. The basic principle
differential.
7 Stepped gear, the range of ratios, their distribution,
jumping order, number of gears.
8 Use of planetary gear drives the vehicle. Terms
of assembly of planets.
9 Drive axle vehicles, the main species and types.
10 Basic types of propulsion of railway wheelset.
11 Basic concepts of geometry of spur gears.
12 The concept of frame and the involute teeth inclined step. Reduce the starting field.
Their significance.
13 Non-standard base profile. Integer duration of coverage, meaning.
14 Basic principle of calculating stress (bending, touch) spur gears by
CSN 014868th
15 Types of gears drives in wheeled and track vehicles. Examples
use.
16 Types of bevel gears. The meaning and use.
17 Precision gears. Basic standards of accuracy and deviations (kinematic
accuracy, continuity of service, touch, play, stop, et al.)
18 Load spectra drivetrain components. Definitions, graphs.
19 The variability of the load. Types of stress on drivetrain components.
20 Wöhler curve and the concept of intensity of damage. Linear theory of fatigue
damage.
21 Calculation of service life of engine components by methods of linear theory
fatigue damage.
22 Shaft drives the vehicle.
23 Bearings for vehicles. Specific.
24 Strong, flexible couplings and friction drives the vehicle.
25 Gear coupling mechanical, synchronized, and friction.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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