zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program
Žiga Mesec (Author), Franc Majdič (Mentor)

Abstract

V okviru zaključne naloge smo na eksperimentalni način analizirali vedenje potnih ventilov v povezavi z njihovim notranjim puščanjem ob spreminjanju vhodnih parametrov. Osrednji namen zaključnega dela je bil popis vzrokov za spremembe delovanja potnega ventila, katerega ohišje je narejeno z aditivnim tridimenzionalnim tiskanjem. Poudarek je bil na spreminjajočem notranjem puščanju, katerega izvor ni poznan. Analiza temelji na spreminjanju vhodnih parametrov, kateri so povezani z vrsto kapljevine, temperaturo, pri kateri je sistem deloval, ter na tlak v njem in popisu posledic povzročenih s strani različnih kombinacij predpisanih parametrov na delovanje in puščanje sistema. Za primerjavo je bil vzporedno testiran tudi standardni ventil, ki je bil serijsko izdelan s tehnologijo litja. Tekom eksperimentov v laboratoriju so bile uporabljene tri različne kapljevine, in sicer voda, mineralno hidravlično olje ISO VG 46 ter glikol. Zaradi zahtevnega ohranjanja stabilne temperature kapljevin med preizkusom je bila kot vhodni podatek upoštevana temperatura pri vrednosti 50 °C in 70 °C. Preizkusi so se izvajali pri treh različnih tlakih: 100 bar, 200 bar ter 300 bar. Zaradi odstopanja geometrije krmilnega bata v ventilu od geometrijske oblike valja je bil kot zadnji parameter upoštevan tudi njegov zasuk.

Keywords

diplomske naloge;hidravlika;hidravlične kapljevine;hidravlični potni ventili;notranje puščanje;aditivne tehnologije;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [Ž. Mesec]
UDC: 621.6.03:621.22(043.2)
COBISS: 133680643 Link will open in a new window
Views: 57
Downloads: 15
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Other data

Secondary language: English
Secondary title: Internal leakage stability of directional control valve with different fluids
Secondary abstract: As part of the final thesis, we experimentally analysed the behaviour of directional control valves in relation to their internal leakage, when the input parameters were changed. The main objective of the final thesis was to list the causes of changes in the operation of the directional control valves, whose bodies are manufactured by additive three-dimensional printing. The focus was on a changed internal leakage of unknown origin. The analyses were based on changing input parameters, which are related to the type of fluid, the temperature at which the system is operated, and the pressure in the system, as well as listing the effects caused by different combinations of given parameters on the operation and leakage of the system. For comparison, a standard valve, mass-produced by the casting process, was tested in parallel. Three different fluids were used in the laboratory tests, namely water, mineral hydraulic oil ISO VG 46 and glycol. Since it is difficult to keep up temperature of the test fluids stable, the values of 50 °C and 70 °C were used as input data. The tests were performed at three different pressure levels: 100 bar, 200 bar, and 300 bar. Since the geometry of the spool in the valve differs from the geometric shape of the cylinder, its torsion was considered as the last parameter.
Secondary keywords: thesis;hydraulics;hydraulic fluids;hydraulic directional control valves;internal leakage;additive technologies;
Type (COBISS): Final paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XIV, 33 f.
ID: 16420293
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