{"id":193,"date":"2015-11-01T22:27:46","date_gmt":"2015-11-01T22:27:46","guid":{"rendered":"http:\/\/ejektor.co.rs\/?p=193"},"modified":"2017-01-04T16:10:11","modified_gmt":"2017-01-04T16:10:11","slug":"ejektorske-pumpe","status":"publish","type":"post","link":"https:\/\/ejektor.co.rs\/?p=193","title":{"rendered":"Ejektorske pumpe"},"content":{"rendered":"<p>Ejektorske pumpe se koriste za usisavanje (crpljenje), potiskivanje i transport svih vrsta te\u010dnosti, emulzija i suspenzija. Crpljene i usisavane te\u010dnosti mogu sadr\u017eavati gasove (vazduh, metan, ugljendioksid i dr.) i nerastvorene \u010dvrste zrnaste i komadaste materijale razli\u010ditog porekla i razli\u010ditih veli\u010dina.<\/p>\n<p>Upotrebljavaju se za obavljanje niza razli\u010ditih operacija u mnogim oblastima (industriji, gra\u0111evinarstvu, vodoprivredi, rudarstvu i dr.). U zavisnosti od vrste pogonskog fluida dele se na:<\/p>\n<ul>\n<li>Ejektorske hidro pumpe (te\u010dnost-te\u010dnost)<\/li>\n<li>Ejektorske gasne pumpe (gas-te\u010dnost)<\/li>\n<li>Ejektorske parne pumpe (para-te\u010dnost)<\/li>\n<\/ul>\n<h2>1.1 Ejektorske-hidro pumpe (te\u010dnost-te\u010dnost)<\/h2>\n<p>Kod ovih tipova pumpi kao pogonski fluid koristi se te\u010dnost (naj\u010de\u0161\u0107e voda). Ove pumpe imaju \u0161iroku primenu u mnogim oblastima: za male i velike protoke (od nekoliko lit\/h do nekoliko hiljada m<sup>3<\/sup>\/h). za niske i visoke izlazne pritiske (od minimalnih do &gt;20 bar), za niske i visoke temperature, za crpljenje vode sa velikih dubina (dubine i ve\u0107e od 500 m), za crpljenje (usisavanje) i potiskivanje te\u010dnosti sa mehani\u010dkim primesama razli\u010ditih veli\u010dina i razli\u010ditog porekla (vidi ejektotorski-hidroransport), za crpljenje (usisavanje) te\u010dnosti koje u sebi sadr\u017ee gasove, za pove\u0107anje usisnih visina drugih pumpi, za spre\u010davanje kavitacije kod pumpi, za transport toplih te\u010dnosti, za usisavanje i potiskivanje kiselih, alkalnih i drugih hemijskih te\u010dnosti, emulzija i suspenzija razli\u010ditih koncentracija i razli\u010ditih sastava, za izvo\u0111enje hemijskih reakcija i za druge specijalne i posebne namene.<\/p>\n<p><a href=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-720 aligncenter\" src=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe01.jpg\" alt=\"pumpe01\" width=\"292\" height=\"292\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><strong>Sl.1 Skica ejektora sa gabaritnim merama<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>\u00a0<a href=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe02.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-722\" src=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe02.jpg\" alt=\"pumpe02\" width=\"252\" height=\"103\" \/><\/a><\/strong><\/p>\n<p style=\"text-align: center;\"><strong>\u00a0Sl.1.1a Parametri fluida<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Q<sub>1<\/sub>, Q<sub>2<\/sub> i Q<sub>3<\/sub> \u2013 zapreminski protoci u (m<sup>3<\/sup>\/s) ili (m<sup>3<\/sup>\/h),<br \/>\n<span class=\"symbol\">r<\/span><sub>1<\/sub>, <span class=\"symbol\">r<\/span><sub>2<\/sub> i <span class=\"symbol\">r<\/span><sub>3<\/sub> \u2013 gustine u (kg\/m<sup>3<\/sup>),<br \/>\np<sub>1<\/sub>, p<sub>2<\/sub>, i p<sub>3<\/sub> \u2013 pritisci u (bar), preporu\u010dljivo u (bar<sub>aps<\/sub>)<\/p>\n<p>Sa indeksom 1, obele\u017een je pogonski fluid na ulazu u ejektor, sa indeksom 2 usisavana te\u010dnost na ulazu u ejektor i sa indeksom 3 me\u0161avina pogonskog fluida i usisavane te\u010dnosti na izlazu iz ejektora.<\/p>\n<table border=\"1\" width=\"67%\" cellspacing=\"2\">\n<tbody>\n<tr align=\"center\" bgcolor=\"#99CCFF\">\n<td style=\"text-align: center;\" rowspan=\"2\" align=\"center\" width=\"8%\"><strong>Vel.<\/strong><\/td>\n<td style=\"text-align: center;\" rowspan=\"2\" width=\"24%\"><strong>Max. protok<br \/>\nQ<sub>3<\/sub> (kg\/h)<\/strong><\/td>\n<td colspan=\"3\"><strong>Priklju\u010dci<br \/>\nDN<\/strong><\/td>\n<td colspan=\"3\"><strong>Dimenzije<br \/>\n(mm)<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"7%\">A<\/td>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"10%\">B<\/td>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"13%\">C<\/td>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"12%\">a<\/td>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"12%\">b<\/td>\n<td align=\"center\" bgcolor=\"#99CCFF\" width=\"14%\">c<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>1<\/td>\n<td>1200<\/td>\n<td>20<\/td>\n<td>20<\/td>\n<td>20<\/td>\n<td>40<\/td>\n<td>80<\/td>\n<td>150<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>2<\/td>\n<td>3500<\/td>\n<td>25<\/td>\n<td>20<\/td>\n<td>32<\/td>\n<td>60<\/td>\n<td>85<\/td>\n<td>270<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>3<\/td>\n<td>6000<\/td>\n<td>32<\/td>\n<td>25<\/td>\n<td>40<\/td>\n<td>65<\/td>\n<td>100<\/td>\n<td>350<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>4<\/td>\n<td>12000<\/td>\n<td>40<\/td>\n<td>32<\/td>\n<td>50<\/td>\n<td>70<\/td>\n<td>115<\/td>\n<td>410<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>5<\/td>\n<td>24000<\/td>\n<td>50<\/td>\n<td>40<\/td>\n<td>65<\/td>\n<td>80<\/td>\n<td>125<\/td>\n<td>480<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>6<\/td>\n<td>32000<\/td>\n<td>65<\/td>\n<td>40<\/td>\n<td>65<\/td>\n<td>80<\/td>\n<td>125<\/td>\n<td>480<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>7<\/td>\n<td>40000<\/td>\n<td>65<\/td>\n<td>50<\/td>\n<td>80<\/td>\n<td>80<\/td>\n<td>125<\/td>\n<td>530<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>8<\/td>\n<td>70000<\/td>\n<td>80<\/td>\n<td>65<\/td>\n<td>100<\/td>\n<td>115<\/td>\n<td>135<\/td>\n<td>730<\/td>\n<\/tr>\n<tr align=\"center\">\n<td>9<\/td>\n<td>100000<\/td>\n<td>100<\/td>\n<td>80<\/td>\n<td>125<\/td>\n<td>150<\/td>\n<td>165<\/td>\n<td>950<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ejektori se prizvode sa prirubnicama, sa cevnim navojem i sa priklju\u010dcima za povezivanje sa gumenim i plasti\u010dnim crevima.<\/p>\n<p>Pri naru\u010divanju ejektora treba navesti slede\u0107e podatke:<\/p>\n<ul>\n<li>gustine <span class=\"symbol\">r<\/span><sub>1<\/sub> i <span class=\"symbol\">r<\/span><sub>2<\/sub> u (kg\/m<sup>3<\/sup>),<\/li>\n<li>masene protoke m<sub>1<\/sub> i m<sub>2<\/sub> ili bar jedan od njih u kg\/s ili kg\/h ili zapreminske protoke Q<sub>1<\/sub> i Q<sub>2<\/sub> ili bar jedan od njih u m<sup>3<\/sup>\/s ili m<sup>3<\/sup>\/h,<\/li>\n<li>od tri pritiska p<sub>1<\/sub>, p<sub>2<\/sub> i p<sub>3<\/sub> dva moraju biti zadata u (bar ili bar<sub>aps<\/sub>),<\/li>\n<li>ako su zadata sva tri pritiska onda se mo\u017ee zadati samo jedan maseni ili zapreminski protok (vidi Sl.1 i Sl.1a).<\/li>\n<\/ul>\n<p><strong><dfn>Primer 1.1<\/dfn><\/strong><\/p>\n<p><dfn>Podaci:<\/dfn> Usisavana voda ima protok m<sub>2<\/sub>=12,4 t\/h, gustinu <span class=\"symbol\">r<\/span><sub>2<\/sub> =1,2 t\/m<sup>3<\/sup>, pritisak p<sub>2<\/sub> = 1,2 bar<sub>aps<\/sub> (ejektor je postavljen 2 m ispod nivoa usisavane te\u010dnosti). Pogonska te\u010dnost ima protok m<sub>1<\/sub>= 20 t\/h i gustinu <span class=\"symbol\">r<\/span><sub>1<\/sub> =1 t\/m<sup>3<\/sup>. Potreban pritisak na izlazu iz ejektora p<sub>3<\/sub> = 2,5 bar<sub>aps<\/sub>. Treba od rediti pritisak pogonske te\u010dnosti p<sub>1<\/sub>.<\/p>\n<p><dfn>Re\u0161enje:<\/dfn> za m = m<sub>2<\/sub>\/m<sub>1<\/sub>=12,4\/20 = 0,62 i <span class=\"symbol\">r<\/span><sub>2<\/sub>\/<span class=\"symbol\">r<\/span> =1,2\/1=1,2<\/p>\n<p>Iz dijagrama se o\u010ditava <span class=\"symbol\">y<\/span> = 0,305 i <span class=\"symbol\">h<\/span> = 0,24.<\/p>\n<p>p<sub>1<\/sub> = p<sub>2<\/sub> + (p<sub>3<\/sub> \u2013 p<sub>2<\/sub>) \/ <span class=\"symbol\">y<\/span> =1,2 + (2,5 \u20131,2) \/ 0,31 = 5,4 bar<sub>aps<\/sub> (4,4 bar)<\/p>\n<p style=\"text-align: left;\"><strong><dfn>Primer 1.2<\/dfn><\/strong><\/p>\n<p>Svi podaci isti kao u primeru 1, samo \u0161to je ejektor postavljen 2 m iznad nivoa usisavane te\u010dnosti tj. pritisak usisavane vode na ulazu u ejektor je p<sub>2<\/sub> = 0,8 bar<sub>aps<\/sub> (0,2 bar vakuum).<\/p>\n<p><dfn>Re\u0161enje:<\/dfn> za m = 0,62; <span class=\"symbol\">r<\/span><sub>2<\/sub>\/<span class=\"symbol\">r<\/span> =1,2, i za <span class=\"symbol\">y<\/span> = 0,305 potreban pritisak pogonske te\u010dnosti je<\/p>\n<p>p<sub>1<\/sub> = p<sub>2<\/sub>+ (p<sub>3<\/sub> \u2013 p<sub>2<\/sub>) \/ <span class=\"symbol\">y<\/span> = 0,8 + (2,5 \u2013 0,8) \/ 0,31 = 6,28 bar<sub>aps<\/sub> (5,28 bar)<\/p>\n<p>Koeficijent korisnosti je isti kao u primeru 1.1 <span class=\"symbol\">h<\/span> = 0,24.<\/p>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td align=\"center\"><a href=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe03.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-723\" src=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe03.jpg\" alt=\"pumpe03\" width=\"301\" height=\"165\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><span class=\"picture\">m = m<sub>2<\/sub>\/m<sub>1<\/sub>(kg<sub>usisavane te\u010dnosti <\/sub>\/kg<sub>pogonske te\u010dnosti<\/sub>)<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><a href=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe04.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-724\" src=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe04.jpg\" alt=\"pumpe04\" width=\"302\" height=\"86\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><strong><span class=\"picture\">Sl.1.2 Varijante povezivanja pumpi i ejektora<\/span><\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><a href=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe05.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-725\" src=\"http:\/\/ejektor.co.rs\/wp-content\/uploads\/2015\/11\/pumpe05.jpg\" alt=\"pumpe05\" width=\"306\" height=\"54\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td align=\"center\"><strong><span class=\"picture\">Sl.1.3 Ejektorski transport prljavih i muljevitih te\u010dnosti<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Ejektorske pumpe se koriste za usisavanje (crpljenje), potiskivanje i transport svih vrsta te\u010dnosti, emulzija i suspenzija. Crpljene i usisavane te\u010dnosti mogu sadr\u017eavati gasove (vazduh, metan, ugljendioksid i dr.) i nerastvorene \u010dvrste zrnaste i komadaste materijale razli\u010ditog porekla i razli\u010ditih veli\u010dina. Upotrebljavaju se za obavljanje niza razli\u010ditih operacija u mnogim oblastima (industriji, gra\u0111evinarstvu, vodoprivredi, rudarstvu i [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"language":[],"class_list":["post-193","post","type-post","status-publish","format-standard","hentry","category-podela"],"acf":[],"_links":{"self":[{"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/posts\/193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=193"}],"version-history":[{"count":16,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/posts\/193\/revisions"}],"predecessor-version":[{"id":726,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=\/wp\/v2\/posts\/193\/revisions\/726"}],"wp:attachment":[{"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=193"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/ejektor.co.rs\/index.php?rest_route=%2Fwp%2Fv2%2Flanguage&post=193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}