Neabrazyvinio antifrikcinio baigiamojo apdirbimo tyrimas didinant triboefektyvumą

Santr. anglBibliogr.:p.146 (6 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Environmentally friendly lubricating greases

Vytauto Didžiojo universitetasŽemės ūkio akademij

Regeneration of friction pairs in internal combustion engines by the metal cladding materials

Vytauto Didžiojo universitetasŽemės ūkio akademij

Regeneration of friction pairs in internal combustion engines by the metal cladding materials

Purpose - The aim of this paper is to investigate the regularities and longevity of the recovering without takedown of the friction pairs in internal combustion engines using the lubricants with metal cladding materials (MCM). Design/methodology/approach - Recovering of friction pairs of internal combustion engines by MCM was investigated using field experiments. Four automobiles were investigated, The wear of those details was evaluated according to the compression in the cylinders. The influence of MCM on the amount of toxic materials (carbon monoxide and hydrocarbons) in the exhaust gas was evaluated after measurements with a gas analyser. Findings - Using MCM can recover on average 60 per cent of lost compression APm. MCM decreases compression dispersion among separate cylinders of the engine. Compression of recovered engine cylinders decreases according to logarithmic function. Increment of cylinders' compression APd decreased on average 40-50 per cent after 10,000 km car run. The recovering of the details of a cylinder-piston group with MCM decreases the emission of toxic exhaust gas to the environment. Research limitations/implications - No laboratory investigations of MCM regeneration of friction pairs were performed which could evaluate the influence of different factors on the regeneration quality. Practical implications - Investigations on the use of MCM for recovering the cylinder-piston details of engines show the expedience in using such materials during periodic technical service of engines when the lubricants are changed. Originality/value - Investigations of regenerating engines by MCM using field experiments were performed for the first timeVytauto Didžiojo universitetasŽemės ūkio akademij

Mokslininkas, siekęs harmonijos

Vytauto Didžiojo universitetasŽemės ūkio akademij

Fluoro oligomerų įtaka trinties porų tribotechninėms savybėms kintamos apkrovos sąlygomis

Straipsnyje nagrinėjama fluoro oligomerų įtaka trinties porų „plienas-plienas“ tribotechninėms savybėms kintamos apkrovos sąlygomis. Parodyta, kad nudilimas turi būti vertinamas pagal nudilusios medžiagos tūrį. Nustatyta, kad trinties paviršių sustiprinimas fluoro oligomerais turi esminę įtaką įdirbimo procesui ir paviršių dilimui: sustiprinti paviršiai lengviau prisitaiko prie apkrovų padidinimo, mažiau ir tolygiau dylaThe paper analyses the influence of fluor-oligomer on the tribological properties of friction pairs “steel-steel” under varying loads. It was proved that the wear should be evaluated according the volume of worn material. The strengthening of friction surface with fluor-oligomer has subsistent impact on the running-in process and surface wear: strengthened surface adapts easier to increased loads, wears less and more evenVytauto Didžiojo universitetasŽemės ūkio akademij

Tribological properties evaluation of mild carbon steel modificated by fluoroligomer

Vytauto Didžiojo universitetasŽemės ūkio akademij

Biologinių tepamųjų medžiagų tribologinių savybių tyrimas

Vytauto Didžiojo universitetasŽemės ūkio akademij

Mašinų gamyba ir remontas : laboratoriniai darbai. D. 1 : metodinė priemonė laboratoriniams darbams atlikti Žemės ūkio inžinerijos fakulteto studentams

Biliogr.: p.45 (6 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij