{"id":1078,"date":"2024-06-03T14:49:51","date_gmt":"2024-06-03T06:49:51","guid":{"rendered":"https:\/\/www.tflequip.com\/products\/ye3p-copy\/"},"modified":"2024-09-26T14:09:12","modified_gmt":"2024-09-26T06:09:12","slug":"ye4","status":"publish","type":"products","link":"https:\/\/www.tflequip.com\/cs\/products\/ye4\/","title":{"rendered":"YE4"},"content":{"rendered":"

P\u0159edstavte str\u00e1nky<\/h2>\n

N\u00edzkonap\u011b\u0165ov\u00fd asynchronn\u00ed motor \u0159ady YE4 odoln\u00fd proti v\u00fdbuchu<\/span><\/span><\/p>\n

\u010c\u00edslo r\u00e1mu: H63-55 <\/span><\/p>\n

Kapacita: 0,12 ~ 450 kW <\/span><\/p>\n

Po\u010det p\u00f3l\u016f: 212P <\/span><\/p>\n

Nap\u011bt\u00ed: 1000 V a ni\u017e\u0161\u00ed<\/span><\/p>\n

 <\/p>\n

posl\u00e1n\u00ed podniku<\/a><\/span><\/h2>\n

Z\u00e1vazek v\u011bnovat se v\u011bdeck\u00e9mu v\u00fdzkumu a inteligentn\u00ed v\u00fdrob\u011b energeticky \u00fasporn\u00fdch motor\u016f s c\u00edlem st\u00e1t se l\u00eddrem \u0161pi\u010dkov\u00e9 v\u00fdroby v motorov\u00e9m pr\u016fmyslu.<\/span><\/p>\n

J\u00e1drem ve\u0161ker\u00e9 pr\u00e1ce je zam\u011b\u0159en\u00ed na \"v\u011bdeck\u00e9 a technologick\u00e9 inovace\", \"maximalizaci p\u0159\u00ednosu pro z\u00e1kazn\u00edka\" a \"ekologickou ochranu \u017eivotn\u00edho prost\u0159ed\u00ed\", <\/span><\/span><\/p>\n

Od n\u00e1vrhu v\u00fdrobku, p\u0159es v\u00fdrobu a v\u00fdrobn\u00ed proces a\u017e po koncept ekologick\u00e9 ochrany \u017eivotn\u00edho prost\u0159ed\u00ed, <\/span><\/span><\/p>\n

Vybudovat p\u0159edn\u00ed zelenou zna\u010dku v oboru s vysoce \u00fasporn\u00fdmi, ekologicky \u0161etrn\u00fdmi a v\u00fdkonn\u00fdmi v\u00fdrobky.<\/span><\/span><\/p>\n

 <\/p>\n

firemn\u00ed vize<\/a><\/h2>\n

Vybudovat prvot\u0159\u00eddn\u00ed vysoce \u00fa\u010dinn\u00fd, energeticky \u00fasporn\u00fd a ekologick\u00fd motor profesion\u00e1ln\u00ed v\u00fdrobn\u00ed a v\u00fdzkumn\u00e9 z\u00e1kladny, vybudovat sto let podnik\u016f, vytvo\u0159it mezin\u00e1rodn\u00ed zna\u010dku, xing n\u00e1rodn\u00ed pr\u016fmysl.<\/span><\/p>\n

Sm\u011br v\u00fdvoje technologie: od vysok\u00e9 \u00fa\u010dinnosti k super\u00fa\u010dinn\u00e9mu v\u00fdvoji. <\/span><\/span><\/p>\n

Sm\u011br v\u00fdvoje funkc\u00ed v\u00fdrobku: integrace motoru do motoru, systematizace, inteligentn\u00ed v\u00fdvoj. <\/span><\/span><\/p>\n

Upravte marketingov\u00fd re\u017eim, pronikn\u011bte do hloubky z\u00e1kazn\u00edk\u016f a aktivn\u011b jim pom\u00e1hejte p\u0159i v\u00fdb\u011bru, n\u00e1vrhu a instalaci produktov\u00fdch \u0159e\u0161en\u00ed. <\/span><\/span><\/p>\n

V\u0161t\u00edpen\u00edm konceptu \"zelen\u00e9\" od sam\u00e9ho po\u010d\u00e1tku poc\u00edt\u00ed z\u00e1kazn\u00edci dlouhodob\u00e9 v\u00fdhody, kter\u00e9 \"zelen\u00e1\" p\u0159in\u00e1\u0161\u00ed, a podpo\u0159\u00ed rozvoj \"zelen\u00fdch\" velk\u00fdch a st\u0159edn\u011b velk\u00fdch motor\u016f, kter\u00e9 vytvo\u0159\u00ed mezin\u00e1rodn\u00ed zna\u010dky.<\/span><\/span><\/p>\n

<\/h2>\n

z\u00e1kladn\u00ed hodnota<\/a><\/h2>\n

Integrita, spolupr\u00e1ce, inovace, kvalita.<\/p>\n

Integrita: dodr\u017eov\u00e1n\u00ed z\u00e1kon\u016f, \u0159\u00edzen\u00ed integrity.<\/span><\/span> Spolupr\u00e1ce: jednota a spolupr\u00e1ce, rozmanitost a oboustrann\u00e1 v\u00fdhra.<\/span><\/span> Inovace: prolomit stereotyp, poru\u0161it tradici.<\/span><\/span> Kvalita: Snaha o dokonalost, snaha o prvot\u0159\u00eddn\u00ed kvalitu.<\/span><\/span><\/p>\n

 <\/p>\n

 <\/p>\n

Odpov\u011b\u010f na kavitaci \u010derpadla<\/span><\/strong><\/h2>\n

Co je kavitace?
\nKdy\u017e m\u00edstn\u00ed tlak kapaliny v \u010derpadle klesne na kritick\u00fd tlak, v kapalin\u011b se vytvo\u0159\u00ed bubliny. Kavitace je cel\u00fd proces shlukov\u00e1n\u00ed, pohybu, \u0161t\u011bpen\u00ed a odstra\u0148ov\u00e1n\u00ed bublin. Kritick\u00fd tlak je obecn\u011b bl\u00edzk\u00fd tlaku vypa\u0159ov\u00e1n\u00ed.
\nJak\u00e1 jsou rizika kavitace?
\n1. Koroze nadproudov\u00fdch sou\u010d\u00e1st\u00ed
\nKoroze m\u00e1 dv\u011b p\u0159\u00ed\u010diny:
\nZa prv\u00e9, v d\u016fsledku vysokofrekven\u010dn\u00edho n\u00e1razu (600-25000 Hz), kter\u00fd vznik\u00e1 p\u0159i prask\u00e1n\u00ed bublinek a jeho\u017e tlak dosahuje a\u017e 49 MPa, doch\u00e1z\u00ed k mechanick\u00e9 erozi kovov\u00e9ho povrchu;
\nDruh\u00fdm d\u016fvodem je to, \u017ee p\u0159i odpa\u0159ov\u00e1n\u00ed se uvol\u0148uje teplo a vznik\u00e1 baterie s teplotn\u00edm rozd\u00edlem, kter\u00e1 zp\u016fsobuje hydrol\u00fdzu. Vznikl\u00fd kysl\u00edk oxiduje kov a zp\u016fsobuje chemickou korozi.
\n2. Sn\u00ed\u017een\u00ed v\u00fdkonu \u010derpadla
\nP\u0159i kavitaci \u010derpadla doch\u00e1z\u00ed k naru\u0161en\u00ed a po\u0161kozen\u00ed v\u00fdm\u011bny energie uvnit\u0159 ob\u011b\u017en\u00e9ho kola a jeho vn\u011bj\u0161\u00ed charakteristiky se projevuj\u00ed poklesem k\u0159ivek Q-H, Q-P a Q-eta. V z\u00e1va\u017en\u00fdch p\u0159\u00edpadech m\u016f\u017ee doj\u00edt k p\u0159eru\u0161en\u00ed proud\u011bn\u00ed kapaliny v \u010derpadle a k jeho neprovozuschopnosti.
\nP\u0159i n\u00edzk\u00fdch specifick\u00fdch rychlostech doch\u00e1z\u00ed v d\u016fsledku \u00fazk\u00fdch a dlouh\u00fdch pr\u016fto\u010dn\u00fdch kan\u00e1l\u016f mezi lopatkami k tomu, \u017ee jakmile dojde ke kavitaci, bubliny vypln\u00ed cel\u00fd pr\u016fto\u010dn\u00fd kan\u00e1l a v\u00fdkonnostn\u00ed k\u0159ivka prudce klesne.
\nP\u0159i st\u0159edn\u00edch a vysok\u00fdch specifick\u00fdch rychlostech je dr\u00e1ha proud\u011bn\u00ed kr\u00e1tk\u00e1 a \u0161irok\u00e1, tak\u017ee je t\u0159eba, aby se bubliny vytvo\u0159ily a zaplnily celou dr\u00e1hu proud\u011bn\u00ed. Odpov\u00eddaj\u00edc\u00ed v\u00fdkonnostn\u00ed k\u0159ivka za\u010d\u00edn\u00e1 pomal\u00fdm poklesem a pot\u00e9 se zvy\u0161uje a\u017e do ur\u010dit\u00e9 rychlosti proud\u011bn\u00ed a pot\u00e9 prudce kles\u00e1.
\nOdst\u0159ediv\u00e1 \u010derpadla jsou nejv\u00edce n\u00e1chyln\u00e1 ke kavitaci v t\u011bchto oblastech:
\nNa p\u0159edn\u00ed kryc\u00ed desce s maxim\u00e1ln\u00edm zak\u0159iven\u00edm ob\u011b\u017en\u00e9ho kola, v bl\u00edzkosti n\u00edzkotlak\u00e9 strany vstupn\u00ed hrany lopatek;
\nVytla\u010dte n\u00edzkotlakou stranu u vstupn\u00edho okraje membr\u00e1ny spir\u00e1ly a vodic\u00edch lopatek v komo\u0159e;
\nT\u011bsnic\u00ed v\u016fle mezi vn\u011bj\u0161\u00edm kruhem \u0161pi\u010dky lopatek a pl\u00e1\u0161t\u011bm ob\u011b\u017en\u00e9ho kola s vysok\u00fdmi specifick\u00fdmi ot\u00e1\u010dkami bez p\u0159edn\u00ed kryc\u00ed desky, jako\u017e i n\u00edzkotlak\u00e1 strana \u0161pi\u010dky lopatek;
\nOb\u011b\u017en\u00e9 kolo prvn\u00edho stupn\u011b v\u00edcestup\u0148ov\u00e9ho \u010derpadla.
\nZlep\u0161en\u00ed opat\u0159en\u00ed proti kavitaci: Zlep\u0161ete konstruk\u010dn\u00ed \u0159e\u0161en\u00ed \u010derpadla od sac\u00edho vstupu a\u017e po okol\u00ed ob\u011b\u017en\u00e9ho kola. Zv\u011bt\u0161ete nadproudovou plochu; Zv\u011bt\u0161ete polom\u011br zak\u0159iven\u00ed vstupn\u00ed \u010d\u00e1sti kryc\u00ed desky ob\u011b\u017en\u00e9ho kola, abyste sn\u00ed\u017eili rychl\u00e9 zrychlen\u00ed a pokles tlaku proud\u00edc\u00ed kapaliny; Vhodn\u00fdm zmen\u0161en\u00edm tlou\u0161\u0165ky vstupn\u00ed \u010d\u00e1sti lopatek a zaoblen\u00edm vstupn\u00ed \u010d\u00e1sti lopatek tak, aby se bl\u00ed\u017eila proudnici, lze rovn\u011b\u017e sn\u00ed\u017eit zrychlen\u00ed a pokles tlaku v okol\u00ed hlavy lopatek; Zlep\u0161ete hladkost povrchu ob\u011b\u017en\u00e9ho kola a vstupn\u00ed \u010d\u00e1sti lopatek, abyste sn\u00ed\u017eili ztr\u00e1ty odporu; Prodlu\u017ete vstupn\u00ed hranu lopatek sm\u011brem ke vstupu do ob\u011b\u017en\u00e9ho kola, aby proud kapaliny dostal pr\u00e1ci p\u0159edem a zv\u00fd\u0161il se tlak.
\nP\u0159i pou\u017eit\u00ed p\u0159ed\u0159azen\u00e9ho kola vykon\u00e1 proud kapaliny v p\u0159ed\u0159azen\u00e9m kole pr\u00e1ci, kter\u00e1 zv\u00fd\u0161\u00ed tlak proud\u00edc\u00ed kapaliny.
\nP\u0159i pou\u017eit\u00ed dvojit\u00e9ho sac\u00edho ob\u011b\u017en\u00e9ho kola vstupuje proud kapaliny do ob\u011b\u017en\u00e9ho kola z obou stran sou\u010dasn\u011b, \u010d\u00edm\u017e se zdvojn\u00e1sob\u00ed vstupn\u00ed pr\u016f\u0159ez a sn\u00ed\u017e\u00ed se vstupn\u00ed pr\u016ftok o jeden.
\nKonstruk\u010dn\u00ed stav vyu\u017e\u00edv\u00e1 m\u00edrn\u011b v\u011bt\u0161\u00ed kladn\u00fd \u00fahel n\u00e1b\u011bhu, aby se zv\u011bt\u0161il vstupn\u00ed \u00fahel lopatek, sn\u00ed\u017eil ohyb na vstupu do lopatek, omezilo se ucp\u00e1v\u00e1n\u00ed lopatek a zv\u011bt\u0161ila se vstupn\u00ed plocha; zlep\u0161en\u00ed pracovn\u00edch podm\u00ednek p\u0159i vysok\u00fdch pr\u016ftoc\u00edch, aby se sn\u00ed\u017eily ztr\u00e1ty proud\u011bn\u00edm. Kladn\u00fd \u00fahel n\u00e1b\u011bhu by v\u0161ak nem\u011bl b\u00fdt p\u0159\u00edli\u0161 velk\u00fd, jinak ovlivn\u00ed \u00fa\u010dinnost.
\nPou\u017eit\u00ed materi\u00e1l\u016f proti kavitaci. Praxe uk\u00e1zala, \u017ee \u010d\u00edm vy\u0161\u0161\u00ed je pevnost, tvrdost a hou\u017eevnatost materi\u00e1l\u016f, t\u00edm lep\u0161\u00ed je jejich chemick\u00e1 stabilita a t\u00edm v\u011bt\u0161\u00ed je jejich odolnost proti kavitaci.
\nOpat\u0159en\u00ed ke zv\u00fd\u0161en\u00ed \u00fa\u010dinn\u00e9 kavita\u010dn\u00ed rezervy za\u0159\u00edzen\u00ed pro p\u0159\u00edvod kapaliny: Zvy\u0161te tlak hladiny kapaliny v z\u00e1sobn\u00ed n\u00e1dr\u017ei p\u0159ed \u010derpadlem, abyste zv\u00fd\u0161ili \u00fa\u010dinnou kavita\u010dn\u00ed rezervu.
\nSni\u017ete instala\u010dn\u00ed v\u00fd\u0161ku \u010derpadla sac\u00edho za\u0159\u00edzen\u00ed.
\nVym\u011b\u0148te sac\u00ed za\u0159\u00edzen\u00ed za zp\u011btn\u00fd ventil.
\nSni\u017ete ztr\u00e1ty pr\u016ftoku v potrub\u00ed p\u0159ed \u010derpadlem. Sna\u017ete se zkr\u00e1tit potrub\u00ed v po\u017eadovan\u00e9m rozsahu, sn\u00ed\u017eit pr\u016ftok v potrub\u00ed, zmen\u0161it ohyby a ventily a co nejv\u00edce zv\u011bt\u0161it otev\u0159en\u00ed ventil\u016f.
\nSni\u017ete teplotu pracovn\u00edho m\u00e9dia na vstupu do \u010derpadla (kdy\u017e se dopravovan\u00e9 pracovn\u00ed m\u00e9dium bl\u00ed\u017e\u00ed teplot\u011b nasycen\u00ed).
\nV\u00fd\u0161e uveden\u00e1 opat\u0159en\u00ed lze komplexn\u011b analyzovat a vhodn\u011b aplikovat na z\u00e1klad\u011b v\u00fdb\u011bru typ\u016f \u010derpadel, materi\u00e1l\u016f a podm\u00ednek pou\u017eit\u00ed na m\u00edst\u011b.
\nKavita\u010dn\u00ed rozp\u011bt\u00ed a sac\u00ed v\u00fd\u0161ka: P\u0159i provozu v\u00fdv\u011bvy vznik\u00e1 na vstupu do ob\u011b\u017en\u00e9ho kola kapalina pod ur\u010dit\u00fdm podtlakem. Vypa\u0159en\u00e9 bubliny zp\u016fsob\u00ed pod n\u00e1razov\u00fdm pohybem \u010d\u00e1stic kapaliny erozi kovov\u00e9ho povrchu ob\u011b\u017en\u00e9ho kola, \u010d\u00edm\u017e dojde k po\u0161kozen\u00ed ob\u011b\u017en\u00e9ho kola a dal\u0161\u00edch kov\u016f. V tomto okam\u017eiku se tlak vakua naz\u00fdv\u00e1 tlak odpa\u0159ov\u00e1n\u00ed. Kavita\u010dn\u00ed rezerva ozna\u010duje p\u0159ebytek energie na jednotku hmotnosti kapaliny na vstupu do \u010derpadla, kter\u00fd p\u0159evy\u0161uje tlak vypa\u0159ov\u00e1n\u00ed, vyj\u00e1d\u0159en\u00fd v metrech a vyj\u00e1d\u0159en\u00fd v (NPSH) r.
\nSac\u00ed v\u00fd\u0161ka je nutn\u00e1 kavita\u010dn\u00ed rezerva \u0394 h, co\u017e je stupe\u0148 podtlaku, kter\u00fd m\u016f\u017ee \u010derpadlo nas\u00e1vat, tj. instala\u010dn\u00ed v\u00fd\u0161ka povolen\u00e1 \u010derpadlem v metrech. Sac\u00ed v\u00fd\u0161ka = standardn\u00ed atmosf\u00e9rick\u00fd tlak (10,33 metru) - NPSH - bezpe\u010dnostn\u00ed rezerva (0,5 metru) - standardn\u00ed atmosf\u00e9rick\u00fd tlak m\u016f\u017ee stla\u010dit v\u00fd\u0161ku podtlaku v potrub\u00ed na 10,33 metru.
\nPokud je nap\u0159\u00edklad kavita\u010dn\u00ed rezerva ur\u010dit\u00e9ho \u010derpadla 4,0 m, vypo\u010dt\u011bte sac\u00ed v\u00fd\u0161ku \u0394 h.
\n\u0158e\u0161en\u00ed: \u0394 h=10,33-4,0-0,5=5,83 m
\nKa\u017ed\u00e1 m\u011brn\u00e1 jednotka a odpov\u00eddaj\u00edc\u00ed p\u00edsmeno: NPSH ozna\u010duje rozd\u00edl mezi celkov\u00fdm tlakem kapaliny na vstupu do \u010derpadla a tlakovou v\u00fd\u0161kou, p\u0159i kter\u00e9 se kapalina odpa\u0159uje. Jednotka se zna\u010d\u00ed v metrech (vodn\u00edho sloupce) a vyjad\u0159uje se v (NPSH), kter\u00e9 lze rozd\u011blit do n\u00e1sleduj\u00edc\u00edch kategori\u00ed: NPSHa - p\u0159\u00edstrojov\u00e1 NPSH, zn\u00e1m\u00e1 tak\u00e9 jako efektivn\u00ed NPSH, kter\u00e1 je s rostouc\u00ed hodnotou m\u00e9n\u011b n\u00e1chyln\u00e1 ke kavitaci;
\nNPSHr - NPSH \u010derpadla, zn\u00e1m\u00e1 tak\u00e9 jako pot\u0159ebn\u00e1 NPSH nebo dynamick\u00e1 tlakov\u00e1 ztr\u00e1ta na vstupu \u010derpadla, \u010d\u00edm men\u0161\u00ed je NPSHr, t\u00edm lep\u0161\u00ed je v\u00fdkon \u010derpadla proti kavitaci;
\nNPSHc - kritick\u00e1 kavita\u010dn\u00ed rezerva, ozna\u010duje kavita\u010dn\u00ed rezervu odpov\u00eddaj\u00edc\u00ed ur\u010dit\u00e9mu poklesu v\u00fdkonu \u010derpadla;
\n[NPSH] - p\u0159\u00edpustn\u00e1 kavita\u010dn\u00ed rezerva, co\u017e je kavita\u010dn\u00ed rezerva pou\u017e\u00edvan\u00e1 k ur\u010den\u00ed provozn\u00edch podm\u00ednek \u010derpadla, obvykle se bere jako [NPSH]=(1,1-1,5) NPSHc.<\/p>","protected":false},"excerpt":{"rendered":"

N\u00edzkonap\u011b\u0165ov\u00fd asynchronn\u00ed motor \u0159ady YE4 odoln\u00fd proti v\u00fdbuchu<\/p>\n

\u010c\u00edslo r\u00e1mu: H63-55 <\/span><\/p>\n

Kapacita: 0,12 ~ 450 kW <\/span><\/p>\n

Po\u010det p\u00f3l\u016f: 212P <\/span><\/p>\n

Nap\u011bt\u00ed: 1000 V a ni\u017e\u0161\u00ed<\/span><\/p>","protected":false},"featured_media":1080,"template":"","adweb_product_categories":[114],"adweb_product_tags":[99,117,303,305,301,302,306,304,300],"gallery":[1079],"order":null,"acf":[],"_links":{"self":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/adweb_products\/1078"}],"collection":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/adweb_products"}],"about":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/types\/products"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media\/1080"}],"wp:attachment":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media?parent=1078"}],"wp:term":[{"taxonomy":"adweb_product_cat","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/adweb_product_categories?post=1078"},{"taxonomy":"adweb_product_tag","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/adweb_product_tags?post=1078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}