1. Noise evaluation of S-polymer gearsBoštjan Trobentar, Matija Hriberšek, Simon Kulovec, Srečko Glodež, Aleš Belšak, 2022, original scientific article Abstract: In this study, an acoustic behaviour of S-polymer gears made of the material combination
POM/PA66 was investigated and compared to the standardised involute gears (E-gears). Basic
evaluating characteristics included noise during operation, which is of particular significance when
noise reduction is expected. The measured signals were analysed in time and frequency domains
and the levels of acoustic activity were compared. The experimental results have shown that the
sound pressure level of both E- and S-polymer gears are proportional to the torque. However, the
comprehensive noise evaluation has shown some advantages of S-polymer gears if compared to the
E-polymer gears. In that respect, S-polymer gears were found more appropriate for noise reduction
of gear drive systems in the case of normal loading and typical drive speed. Future studies in the
operating behaviour of S-polymer gears could also cover noise evaluation using new methods of
sound signal analysis at different temperatures of gears.
Keywords: polymers, S-gears, sound, noise analysis
Published in DKUM: 24.03.2025; Views: 0; Downloads: 6
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2. Nosilnost polimernih zobnikov z S-ozobjem : doktorska disertacijaBoštjan Trobentar, 2022, doctoral dissertation Abstract: V tej doktorski disertaciji je predstavljena celovita eksperimentalna analiza odpovedi in akustičnega obnašanja S-polimernih zobnikov. Analizirani zobniki, izdelani iz dveh polimerov (POM in PA66), pogosto uporabljenih v proizvodnji zobnikov, so bili obdelani s standardiziranim rezalnim orodjem, nato pa preučeni in primerjani s standardiziranimi evolventnimi zobniki (E-zobniki) na namensko izdelani napravi za preskušanje zobnikov, ki omogoča stalno nastavljanje navora z uporabo pogonskega in zavornega asinhronskega elektromotorja. Eksperimentalno preskušanje je potekalo pod različnimi zunanjimi obremenitvami zobniškega para (navora) do končne okvare, ki se je pojavila v naslednjih treh različnih oblikah: zlom korena zoba, deformacija zoba ali taljenje zoba. Poleg tega so bile vključene osnovne karakteristike za ocenjevanje zajemanja hrupa med delovanjem, kar je še posebej pomembno, kadar se pričakuje zmanjšanje hrupa ob uporabi polimernih zobnikov. Izmerjeni signali so bili analizirani v časovnem in frekvenčnem prostoru, ravni akustične aktivnosti pa so bile medsebojno primerjane. Eksperimentalni rezultati so pokazali, da so ravni zvočnega tlaka zobnikov sorazmerne z velikostjo navora. Primerjava rezultatov je pokazala, da S-ozobje izkazuje boljšo nosilnost kot E-zobniki pri veliki obremenitvi in mehkejšem materialu zobnikov (POM), kjer lahko povišana temperatura znatno vpliva na taljenje zob zobnikov. Na področju ocenjevanja hrupa je analiza pokazala nekatere prednosti S- zobnikov v primerjavi z E- zobniki. V zvezi s tem je bilo ugotovljeno, da so S- zobniki primernejši za zmanjšanje hrupa zobniških pogonskih sistemov pri normalni obremenitvi in tipični pogonski hitrosti.
Keywords: S-zobniki, polimerni zobniki, preizkusi zobnikov, odpoved zobnikov, zvočna analiza, akustika
Published in DKUM: 04.01.2023; Views: 673; Downloads: 105
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3. The influence of surface coatings on the tooth tip deflection of polymer gearsBoštjan Trobentar, Srečko Glodež, Jože Flašker, Boštjan Zafošnik, 2016, original scientific article Abstract: When designing gear drives made of polymer, the tooth tip deflection is a crucial parameter in respect to the proper gear drive operation. Excessive tooth tip deflection can lead to serious disturbances of gear meshing and consequently to increased noise and wear of the teeth flanks. In such cases the tooth tip deflection can be reduced through the use of stiff surface coatings on the tooth flanks. In this paper the influence of different coating materials and thicknesses on the tooth tip deflection of polymer gears is analysed using comprehensive finite element computational analysis. The numerical results obtained are then used to define an approximate equation for the calculation of gear tooth tip deflection for the coating material used and the thickness of the surface coating layer. The results show that the tooth tip deflection decreases with large values of the coating material Young’s modulus and with the coating layer thickness.
Keywords: polymer gears, surface coatings, tooth deflection, numerical analysis
Published in DKUM: 27.03.2017; Views: 1816; Downloads: 411
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4. Razvoj ohišja diferenciala za formula student dirkalnikBoštjan Trobentar, 2012, undergraduate thesis Abstract: Predmet, ki ga želim raziskovati, je plod mojega udejstvovanja pri projektu Formula student. Sam sem razvijal pogonski sklop, in sicer ohišje diferenciala, ki je popolnoma prilagojeno potrebam dirkalnika. Ker so bile nekateri sestavni deli sponzorsko pridobljeni, kot so na primer lamele in stožčasti zobniki, je bilo potrebno izdelati ohišje diferenciala in poskrbeti za usklajeno delovanje med kupljenimi in izdelanimi deli sklopa.
Keywords: Formula student, dirkalnik, diferencial, delna zapora
Published in DKUM: 15.11.2012; Views: 2101; Downloads: 325
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