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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Možnosti hodnocení vlastností biologicky odbouratelných olejů

Pavelka, Zdeněk January 2006 (has links)
No description available.
2

Otočný zvedací stůl vyšší nosnosti / Rotary lifting table with higher load capacity

Nytra, Tomáš January 2021 (has links)
This Master thesis deals with construction design of pop-up turntable with load capacity 120 tons and 1500 mm stroke. The driveline will supply by combination of hydromotor and planetary gearbox.The first part of this thesis deals with research in the field of current offer of pop-up turntables and construction elements used in pop-up turntables.Then is acceded to design of 3 different construction variants, of which is chosen one based on evaluation properties of each variant. After this part, follows on constuction design of chosen variant, including both desinging and calculating part. Part of the thesis is also required technical drawing documentation.
3

Studie proveditelnosti malé vodní elektrárny / Feasibility study of the small hydropower station

Chromý, Hynek January 2014 (has links)
The goal of the work is to find suitable soulition for a small water plant in kontinuity of a projekt of damaged dam repair.
4

Posouzení vybrané části stokové sítě v urbanizovaném území / Assessment of selected part of sewer network in urbanized area

Köhler, David January 2020 (has links)
The aim of the thesis is to assess the current state of sewerage of the site of interest in Ostrava and to suggest a possible renewal or extension of the sewer network. The work is divided into accompanying report, technical report, hydrotechnical calculations and drawing documentation. The assessment consists of determination of the technical state of selected sewers, hydraulic assessment of the sewer network with a proposal of possible measures and economic evaluation of these measures. In the part of hydrotechnical calculations creation of hydraulic model in program MIKE URBAN is described, including process of calibration and simulation of individual proposed variants of renewal or extension of sewer network of the locality of interest.
5

Vliv filtrů na plnění formy při odlévání slitin hliníku / Influence of filters on running of metal flow

Makalouš, Jakub January 2008 (has links)
This study deals with influence of filters on running of aluminum metal flow. The main objective was to describe hydraulic resistances of assorted filters and running of silting filters by inclusions. Theoretical part generally describes filtration process and also filtration from the point of view of aluminum alloys and the most important characteristics of each type of alumina inclusions. Experimental part deals with flow rate tests, influence of filters on gassiness of melt and metallographic analysis. It was find out, that filter GEPHAL made minimal hydraulic resistance, on the other hand ceramic foam filters type LD made the maximal hydraulic resistance. It is necessary to reduce filtration surface for study running of silting filters by inclusions. Metallographic analysis showed amorphous alumina film inclusions, spinell Al2O3.2MgO, sludge and carbide of silicon.
6

Stanovení ztrát při nestacionárním proudění kapaliny v trubici / Hydraulic losses during unsteady flow of liquid in a pipe

Svoboda, Jakub January 2011 (has links)
This thesis is focused on solving hydraulic losses during unsteady flow of liquid in pipe for both laminar and turbulent flow in smooth pipes. Radial viscosity distribution is assumed to be the same as for steady flow. Viscosity distribution is derived from velocity profile, which is mathematically described with suitably chosen function. Laplace images of unsteady velocity profile and mean velocity in cross-section are derived depending on pressure difference. Loss coefficient is derived and on base of transfer matrix method, self-numbers are calculated. Self-numbers represent attenuation and own frequency. Self-numbers are compared to values from software called “F-ACHAR” and loss coefficient is compared to the one for quasi-steady method.
7

Analýza stability odchylky odtahu při výrobě hydraulických hadic / Investigation of process stability at the braiding

Josiek, Robert January 2012 (has links)
This thesis is focused on analyzing pitch as one of the key parameters in manufacturing hydraulic hoses. Data for this analysis was acquired directly on site at Semperflex Optimit s.r.o. In this paper, a description of processes will be provided, and the influence of these processes on the pitch will be investigated. During this analysis two processes were found to have the greatest influence on the pitch and improvements were suggested. Using the Gauge R&R method, the precision of the measuring system was assessed and the appropriate adjustments were made.
8

Malý hydraulický lis na biobrikety / Small hydraulic press for bio-briquet

Kadlec, Martin January 2012 (has links)
The aim of this master´s thesis was the design of a small hydraulic press for bio-briquettes according to predetermined parameters. The theoretical part presents the current situation in terms of biomass processing, briquette production and a description of briquetting presses. The practical part deals with solutions and detailed structural design of the selected alternatives. Models and drawings were created in the SolidWorks 2011.
9

Využití fluidních popílků k přípravě hydraulické maltoviny / UTILIZATION OF FBC ASH FOR HYDRAULIC BINDER PREPARATION

Wagner, Štěpán January 2012 (has links)
FBC-ashes, as a waste product of a relatively new technology of combustion, so-called fluidized bed combustion, cannot be used for building materials production in contrast to fly-ashes. Problem rests in their chemical as well as their mineralogical composition. Thought it can be admitted that FBC-ash may be used for preparation of the hydraulic binder with a similar chemical and mineralogical composition, but only in a certain limit of concentration. The first part of this thesis was focused on the potentialities of fluid fly ashes utilization as hydraulic bonding material in preparation of dry mortar mixtures and the second part of works was engaged in research development of burned hydraulic binder of FBC ash. The thesis explores the conjunction between parameters of burning mode and hydraulic binder characteristics.
10

Mechanické zajištění hydraulických zdvihacích systémů pro jevištní techniku / Mechanical securing of hydraulic lifting systems for stage technology

Drha, Vojtěch January 2018 (has links)
The aim of this thesis is to design a mechanical position securing of hydraulic elevating systems for stage technology. The first part includes an overview of present state of elevating systems and their securing solutions. The second part determines technical parameters and design of a chosen solution together with control and design calculations. Final part analyses suggested solution in terms of security.

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