Machine Elements and Mechanisms II.

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Designing and Machine Components

Synopsis:

Preliminary design, design calculations and aplication of axles and shafts, sliding and rolling bearings, shaft connections, elements of crank mechanism, pipelines and their accessories and fittings.

Requirements:

Examination:

- knowledge of whole range of lectured subject matters,

- capability to sketch of given arrangement of shaft supporting inside gearboxes with help of rolling bearings without use of literature,

- numerical calculation of given design example of simple driving mechanism or supporting system with use of literature

Syllabus of lectures:

Axles and shafts. Preliminary design, strength and deformation evaluation. Vibration of shafts.

Sliding bearings. Bases of tribology, lubrication, lubricants. Radial sliding bearings operating at hydrodynamic or hydrostatic lubrication. Design, loading capacity and reliability of sliding bearings.

Rolling bearings. Standardisation. Kinematics, dynamics, loading capacity, durability of rolling bearings. Shaft supporting with use of rolling bearings.

Shaft coupling and clutches. Main types, properties, characteristics, application. Kinematics, dynamics, design, dimensioning, design calculations.

Inelastic, elastic and compensating shaft couplings.

Design, loading capacity and compensating capabilities of shaft couplings.

Dynamic torsional analysis of driving systems provided with shaft couplings.

Mechanically controlled shaft clutches. Design, calculation of loading capacity, compensating properties.

Special shaft clutches. Safety, starting, overrunning clutches.

Main parts of crank mechanisms. Kinematics and dynamics of crank mechanism. Theoretic indicator diagrams.

External, internal and inertial forces loading crank mechanisms.

Loading, preliminary strength calculation and design of main parts of crank mechanisms.

Pipelines and fittings. Flow of substance through pipeline. Operating parameters, calculation of pipeline diameter.

Pipes. Materials, production, dimensioning, loading capacity, joining.

Pipeline compensators.

Closing fittings. Cocks, valves, gate valves. Closing forces of fittings, dimensioning, design calculations.

Syllabus of tutorials:

Design project of driving mechanis of conveyor:

Preliminary design concept of whole driving mechanism.

Design concept of gearbox.

Assembly drawing of gearbox with main design calculations.

Dynamic torsional analysis of whole driving mechanism.

Alternative concept arrangement of projected driving mechanism at substitution of gearbox and additional drive with single-stage worm gearbox. Concept design of gearbox. Assembly drawing of worm shaft and its supporting inside gearbox with main design calculations.

Study Objective:

Extension of knowledge and acquisition of basic skills at design of following machine parts and mechanisms following up the course Machine Elements and Mechanisms I.

Clarification of basic calculating theories, models, procedures and design principles of machine elements and assembly units with general use.

Study materials:

Jančík, L.: Machine Elements and Mechanisms II (study texts). CTU Prague, 2008

Jančík, L.: Design Project (study text). CTU Prague, 2008

J.E. Shigley; Ch.R. Mischke: Mechanical Engineering Design. McGraw Hill, New York, 1989.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• 12 74 79 00 BTZSI 2012 A - prezenční anglicky (compulsory course in the program)
• 09 54 59 00 DSTR 2012 A - prezenční anglicky (compulsory course in the program)