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Design of impact microviscometer
Junek, Jan ; Zimmerman, Martin (referee) ; Hartl, Martin (advisor)
This thesis treats the design and practical realization of the impact microviscosimeter construction. In the thesis there is stated the synopsis of the ten to date existing experimental devices meant for the study of rheological features of lubricants. There is elaborated their technical and developmental analysis with the description of used measuring method. It also includes basics calculations, the size of Hertz contact region and the size of the force loading, which are necessary for the design and construction of this particular device. The part of this thesis is the technical documentation.
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Cam-follower contact
Urban, Filip ; Zimmerman, Martin (referee) ; Šperka, Petr (advisor)
This bachelor thesis deals with construction design of a cam-follower contact simulator. At the beginning of the thesis there is a brief overview of cams, forces acting in valve train system and types of cam-follower contact wear. There is also review of other apparatuses developed for cam-follower contact research. Main part is devoted to construction design, variants of design and calculations.
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Active database of standart at Institute of design created
Slezák, Jan ; Zimmerman, Martin (referee) ; Dvořáček, Jiří (advisor)
Aim of this bachelor’s thesis is to create compact database of valid standards, which are on hand the Institute of design created with the possibility continuous refilling by database system. A short charakteristics of standard and basic identification data belong to the survey. There is charakteristic of standard, kinds of standards and history of standards in the first part. Creation of standards, their numbering and obligation are introduced in the second part. Databases are introduce in the third part.
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Design of clamping fixture for ball and spherical-roller speciments
Vodrada, Tomáš ; Ali, Fadi (referee) ; Zimmerman, Martin (advisor)
The bachelor thesis deals with engineering design of positioning and loading part of experimental apparatus that is meant for studying of rheological properties of lubricants in VUT Brno. The thesis contains a brief summary of devices designed up to now including short descriptions of their function, engineering requirements, designs of constructional variations and descriptions of parts of designed device.
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Working body of the disk stubble plough
Smola, Tomáš ; Zimmerman, Martin (referee) ; Brandejs, Jan (advisor)
The aim of this bachelor thesis is to map a knowledge survey of present state in the area of disk plough-harrows and its working organs’ construction. In the first part is briefly described history of agriculture, development and possible structural design of disk plough-harrows. Further it focuses on the best variant choice and working organs’ construction. In conclusion follows the evaluation of established knowledge.
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Experimental Analysis of Kinematic Quantities on Cam Mechanism
Komenda, Lukáš ; Dočkal, Aleš (referee) ; Zimmerman, Martin (advisor)
This diploma thesis deals with creation of a laboratory task related with analysis of kinematic quantities on cam machanism. A new measuring chain was created as a part of the new laboratory task for analysis of kinematic quantities with use of sensors and signal processing by software LabVIEW. The concept of the laboratory task on a experimental machine was based on knowledge gained from Current State of Knowledge where basic principles of laboratory training and utilization of cam mechanisms in learning were described.
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Design of Hydraulic Burner Mouting
Princ, Pavel ; Zimmerman, Martin (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with constructional solution of gas burner clamping and control. The first part is dedicated to the general treatise about artificial aggregate production and its usage. Following parts look into possibilities of guarding the level of charge, which has just under burner high temperatures around 900 - 1000 °C. Proposal of mechanism, which keeps burner in constant height above the level, is done in last part..
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EHD Lubrication Film Behaviour under Rapid Change of Velocity and Load
Zimmerman, Martin ; Dzimko, Marián (referee) ; Návrat, Tomáš (referee) ; Dobeš, Petr (referee) ; Hartl, Martin (advisor)
This dissertation is focused on experimental study of lubricant film behavior under transient conditions. For real machine parts such as gears, roller bearings and cam mechanism the operating conditions such as speed, load and radius of curvature of rubbing surfaces are vary during the working cycle. Change in operating conditions may pose an increased risk of the lubricating film breakdown. Direct contact of rubbing surfaces at the time of the lubricating film breakdown causes an increase in friction and wear. The high-speed CMOS camera was used to record the dynamic changes in lubricating film thickness during the experiment. The optical interferometry method has been used for reverse reconstruction of lubricating film thickness of the recorded interferograms. It was confirmed that the operating parameters have a major impact on the formation of lubricant film and its thickness and a certain combination of boundary conditions can cause lubricating film rupture. The obtained results showed, that modified topography of the rubbing surfaces can help to increase the lubrication film thickness especially in critical phases of working cycle.
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