{"id":4745,"date":"2020-07-13T10:06:18","date_gmt":"2020-07-13T08:06:18","guid":{"rendered":"https:\/\/www.vtusp.cz\/?p=4745"},"modified":"2020-07-13T10:07:58","modified_gmt":"2020-07-13T08:07:58","slug":"zajimave-informace-pro-ridice-z-tribotechnicke-laboratore-vtu","status":"publish","type":"post","link":"https:\/\/www.vtusp.cz\/en\/aktuality\/zajimave-informace-pro-ridice-z-tribotechnicke-laboratore-vtu\/","title":{"rendered":"Zaj\u00edmav\u00e9 informace pro \u0159idi\u010de z tribotechnick\u00e9 laborato\u0159e VT\u00da"},"content":{"rendered":"<div class=\"element core-paragraph perex\">\n<p class=\"perex\">Tribotechnick\u00e1 laborato\u0159 zku\u0161ebny speci\u00e1ln\u00edch syst\u00e9m\u016f a zku\u0161ebny pohonn\u00fdch hmot a maziv v od\u0161t\u011bpn\u00e9m z\u00e1vodu Vojensk\u00fd technick\u00fd \u00fastav pozemn\u00edho vojska Vy\u0161kov se zab\u00fdv\u00e1 praktick\u00fdm prov\u00e1d\u011bn\u00edm tribotechnick\u00e9 diagnostiky motor\u016f, p\u0159evodovek a hydraulick\u00fdch syst\u00e9m\u016f. V\u00a0tribotechnick\u00e9 laborato\u0159i jsou sledovan\u00fdmi parametry tak\u00e9 kyselost a alkalita motorov\u00fdch olej\u016f, kter\u00e9 nejsou p\u0159\u00edli\u0161 \u010dasto zmi\u0148ov\u00e1ny, av\u0161ak p\u0159i hodnocen\u00ed kvality motoru a jeho vy\u010derpanosti p\u0159i provozu pat\u0159\u00ed velmi d\u016fle\u017eit\u00e9 \u00fadaje.<\/p>\n<\/div>\n\n<div class=\"element core-paragraph\">\n<p>L\u00e1tky kysel\u00e9 povahy v&nbsp;motorov\u00e9m oleji jsou p\u0159\u00edtomny z&nbsp;t\u011bchto d\u016fvod\u016f: pou\u017eit\u00ed aditiv (nap\u0159. antioxidanty nebo mazivostn\u00ed p\u0159\u00edsady) a jejich vznikem b\u011bhem provozu motorov\u00e9ho oleje. Kysel\u00e9 l\u00e1tky nejsou v motorov\u00e9m oleji \u017e\u00e1douc\u00ed a v nejhor\u0161\u00edm p\u0159\u00edpad\u011b mohou zp\u016fsobit i z\u00e1va\u017enou korozi motoru. Proto ka\u017ed\u00fd motorov\u00fd olej obsahuje alkalick\u00e9 slou\u010deniny, kter\u00e9 neutralizuj\u00ed p\u016fsoben\u00ed kysel\u00fdch l\u00e1tek. T\u011bmto alkalick\u00fdm l\u00e1tk\u00e1m se \u0159\u00edk\u00e1 alkalick\u00e1 rezerva oleje. Vyjad\u0159uje se pomoc\u00ed hodnoty TBN (zkratka anglick\u00e9ho n\u00e1zvu Total Base Number) a znamen\u00e1 celkov\u00e9 \u010d\u00edslo alkality. \u010c\u00edm je hodnota TBN vy\u0161\u0161\u00ed, t\u00edm d\u00e9le vydr\u017e\u00ed olej neutralizovat kysel\u00e9 l\u00e1tky. Stejn\u011b jako alkalitu oleje je mo\u017en\u00e9 i kyselost oleje vyj\u00e1d\u0159it m\u011b\u0159itelnou hodnotou TAN (Total Acid Number &#8211; celkov\u00e9 \u010d\u00edslo kyselosti). Toto \u010d\u00edslo vyjad\u0159uje mno\u017estv\u00ed slab\u011b i siln\u011b kysel\u00fdch l\u00e1tek v oleji. Ob\u011b hodnoty, TBN i TAN, se vyjad\u0159uj\u00ed ve stejn\u00fdch jednotk\u00e1ch (mg KOH\/g). TAN a TBN se stanovuj\u00ed titra\u010dn\u011b. Pro stanoven\u00ed TAN je ke vzorku oleje rozpu\u0161t\u011bn\u00e9ho v&nbsp;neutr\u00e1ln\u00edm rozpou\u0161t\u011bdle po kapk\u00e1ch p\u0159id\u00e1v\u00e1n roztok hydroxidu draseln\u00e9ho a sleduje se okam\u017eik, kdy olej p\u0159estane vykazovat kysel\u00e9 vlastnosti a p\u0159ev\u00e1\u017e\u00ed naopak alkalick\u00e9 vlastnosti d\u00edky p\u0159idan\u00e9mu hydroxidu. Tento okam\u017eik je mo\u017en\u00e9 detekovat r\u016fzn\u00fdmi zp\u016fsoby.<\/p>\n<\/div>\n\n<div class=\"element core-paragraph\">\n<p>Nov\u011bj\u0161\u00ed metody jsou zalo\u017eeny na detekci n\u011bkter\u00fdch elektrochemick\u00fdch vlastnost\u00ed oleje, nej\u010dast\u011bji jde o tzv. potenciometrickou titraci. Z mno\u017estv\u00ed p\u0159idan\u00e9ho hydroxidu se ur\u010d\u00ed hodnota TAN. S m\u011b\u0159en\u00edm TBN je to velmi podobn\u00e9. P\u0159i provozu oleje doch\u00e1z\u00ed k n\u00e1r\u016fstu kyselosti (TAN) a sou\u010dasn\u011b k poklesu alkality (TBN) oleje. Aby motorov\u00fd olej spr\u00e1vn\u011b fungoval a krom\u011b dokonal\u00e9ho maz\u00e1n\u00ed tak\u00e9 chr\u00e1nil motor p\u0159ed koroz\u00ed, je d\u016fle\u017eit\u00e9, aby hodnota TBN byla b\u011bhem provozu v\u017edy vy\u0161\u0161\u00ed ne\u017e hodnota TAN. Jen tak motorov\u00fd olej dok\u00e1\u017ee likvidovat neust\u00e1l\u00fd p\u0159\u00edsun kysel\u00fdch l\u00e1tek z provozu motoru. N\u011bkter\u00e9 m\u00edrn\u011bj\u0161\u00ed po\u017eadavky na hodnoty TAN a TBN p\u0159ipou\u0161t\u011bj\u00ed n\u00e1r\u016fst TAN a\u017e na 80 % hodnoty TBN \u010derstv\u00e9ho oleje nebo pokles TBN na polovinu p\u016fvodn\u00ed hodnoty.<\/p>\n<\/div>\n\n<div class=\"element core-paragraph\">\n<p>Autor: Josef Singer<\/p>\n<\/div>\n\n<div class=\"element core-paragraph\">\n<p>Ilustra\u010dn\u00ed foto: archiv VT\u00daPV Vy\u0161kov<\/p>\n<\/div>\n\n<div class=\"element core-gallery\">\n<figure class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/01-2.jpg.webp\" data-rel=\"lightbox-gallery-PlrkkK42\" data-rl_title=\"01-2\" data-rl_caption=\"\" title=\"01-2\"><img decoding=\"async\" width=\"1024\" height=\"728\" src=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/01-2.jpg.webp\" 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data-link=\"https:\/\/www.vtusp.cz\/?attachment_id=4750\" class=\"wp-image-4750\" srcset=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/02-2.jpg.webp 1024w, https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/02-2-900x602.jpg.webp 900w, https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/02-2-600x400.jpg.webp 600w, https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/02-2-768x514.jpg.webp 768w, https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/02-2-300x200.jpg.webp 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/04-2.jpg.webp\" data-rel=\"lightbox-gallery-PlrkkK42\" data-rl_title=\"04-2\" data-rl_caption=\"\" title=\"04-2\"><img decoding=\"async\" width=\"780\" height=\"585\" src=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/04-2.jpg.webp\" alt=\"\" data-id=\"4756\" data-full-url=\"https:\/\/www.vtusp.cz\/files\/uploads\/2020\/07\/04-2.jpg\" data-link=\"https:\/\/www.vtusp.cz\/?attachment_id=4756\" class=\"wp-image-4756\" srcset=\"https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/04-2.jpg.webp 780w, https:\/\/www.vtusp.cz\/files\/smush-webp\/2020\/07\/04-2-768x576.jpg.webp 768w\" sizes=\"(max-width: 780px) 100vw, 780px\" \/><\/a><\/figure><\/li><\/ul><\/figure>\n<\/div>\n\n<div class=\"element core-paragraph\">\n<p><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Tribotechnick\u00e1 laborato\u0159 zku\u0161ebny speci\u00e1ln\u00edch syst\u00e9m\u016f a zku\u0161ebny pohonn\u00fdch hmot a maziv v od\u0161t\u011bpn\u00e9m z\u00e1vodu Vojensk\u00fd technick\u00fd \u00fastav pozemn\u00edho vojska Vy\u0161kov se zab\u00fdv\u00e1 praktick\u00fdm prov\u00e1d\u011bn\u00edm tribotechnick\u00e9 diagnostiky motor\u016f, p\u0159evodovek a hydraulick\u00fdch&#8230;<\/p>\n","protected":false},"author":3,"featured_media":4752,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"class_list":["post-4745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aktuality"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Zaj\u00edmav\u00e9 informace pro \u0159idi\u010de z tribotechnick\u00e9 laborato\u0159e VT\u00da | VT\u00da s.p.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vtusp.cz\/en\/aktuality\/zajimave-informace-pro-ridice-z-tribotechnicke-laboratore-vtu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta 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