{"id":1527,"date":"2025-09-03T14:36:16","date_gmt":"2025-09-03T06:36:16","guid":{"rendered":"https:\/\/www.tflequip.com\/?p=1527"},"modified":"2025-09-03T14:36:16","modified_gmt":"2025-09-03T06:36:16","slug":"causes-and-solutions-for-excessive-vibration-of-centrifugal-pumps","status":"publish","type":"post","link":"https:\/\/www.tflequip.com\/cs\/causes-and-solutions-for-excessive-vibration-of-centrifugal-pumps\/","title":{"rendered":"P\u0159\u00ed\u010diny a \u0159e\u0161en\u00ed nadm\u011brn\u00fdch vibrac\u00ed odst\u0159ediv\u00fdch \u010derpadel"},"content":{"rendered":"
P\u0159\u00ed\u010diny a \u0159e\u0161en\u00ed nadm\u011brn\u00fdch vibrac\u00ed odst\u0159ediv\u00fdch \u010derpadel:<\/div>\n

 <\/p>\n

    \n
  1. \n
    Upevn\u011bn\u00ed z\u00e1klad\u016f
    P\u0159i v\u00fdskytu z\u00e1vady nejprve zkontrolujte, zda jsou kotevn\u00ed \u0161rouby prim\u00e1rn\u00edho pohonu a odst\u0159ediv\u00e9ho \u010derpadla bezpe\u010dn\u011b upevn\u011bny. Pokud je z\u00e1klad nestabiln\u00ed, nevyhnuteln\u011b to zp\u016fsob\u00ed vibrace \u010derpadla. Pokud jsou vylou\u010deny jin\u00e9 p\u0159\u00ed\u010diny, ale probl\u00e9m se st\u00e1le neda\u0159\u00ed vy\u0159e\u0161it, je t\u0159eba tak\u00e9 zv\u00e1\u017eit, zda je pevnost kotevn\u00edho z\u00e1kladu dostate\u010dn\u00e1. N\u011bkdy m\u016f\u017ee z konstruk\u010dn\u00edch d\u016fvod\u016f zp\u016fsobovat vibrace i relativn\u011b m\u011bkk\u00fd z\u00e1klad.<\/div>\n<\/li>\n
  2. \n
    Nastaven\u00ed centrov\u00e1n\u00ed
    \u010castou p\u0159\u00ed\u010dinou vibrac\u00ed je tak\u00e9 \u0161patn\u00e9 se\u0159\u00edzen\u00ed. St\u0159ed mus\u00ed b\u00fdt se\u0159\u00edzen ve stanoven\u00e9m rozsahu v p\u0159\u00edsn\u00e9m souladu s normami.<\/div>\n<\/li>\n
  3. \n
    Kontrola lo\u017eisek
    Pokud se u \u010derpadel s kluzn\u00fdmi lo\u017eisky nepoda\u0159\u00ed vibrace odstranit ani po proveden\u00ed v\u00fd\u0161e uveden\u00fdch \u00fakon\u016f, je t\u0159eba zkontrolovat stav kontakt\u016f lo\u017eiskov\u00fdch pouzder. U norm\u00e1ln\u00edch lo\u017eiskov\u00fdch pouzder by spodn\u00ed pouzdro m\u011blo m\u00edt rovnom\u011brn\u00e9 kontaktn\u00ed stopy, rozlo\u017een\u00e9 hlavn\u011b ve st\u0159edn\u00ed a spodn\u00ed \u010d\u00e1sti, a kontaktn\u00ed plocha by m\u011bla b\u00fdt v\u011bt\u0161\u00ed ne\u017e 75%. Horn\u00ed pouzdro by m\u011blo m\u00edt mezeru, obvykle 0,1 - 0,15% pr\u016fm\u011bru h\u0159\u00eddele. V\u00fdvodka horn\u00edho pouzdra by m\u011bla m\u00edt t\u011bsnost 0,02 - 0,02 mm na horn\u00edm pouzdru. Pokud tyto po\u017eadavky nelze splnit, obecn\u011b se k \u0159e\u0161en\u00ed probl\u00e9mu pou\u017e\u00edvaj\u00ed metody, jako je p\u0159id\u00e1n\u00ed nebo odstran\u011bn\u00ed t\u011bsn\u011bn\u00ed v \u00fast\u00ed pouzdra a se\u0161kr\u00e1b\u00e1n\u00ed lo\u017eiskov\u00fdch pouzder. U \u010derpadel, kter\u00e1 pou\u017e\u00edvaj\u00ed valiv\u00e1 lo\u017eiska, by se m\u011bla m\u011b\u0159it t\u011bsnost lo\u017eiskov\u00e9ho pouzdra na vn\u011bj\u0161\u00edm krou\u017eku lo\u017eiska. Obecn\u011b by m\u011bla b\u00fdt vyhrazena dilata\u010dn\u00ed mezera p\u0159ibli\u017en\u011b 0,20 mm, aby se zabr\u00e1nilo p\u016fsoben\u00ed axi\u00e1ln\u00ed s\u00edly na lo\u017eisko p\u0159i rozta\u017een\u00ed rotoru v zah\u0159\u00e1t\u00fdch podm\u00ednk\u00e1ch.<\/div>\n<\/li>\n
  4. \n
    Nastaven\u00ed st\u0159edov\u00e9 polohy rotoru
    Rotor \u010derpadla by m\u011bl b\u00fdt soust\u0159edn\u00fd se statorem. V opa\u010dn\u00e9m p\u0159\u00edpad\u011b bude p\u0159i provozu \u010derpadla doch\u00e1zet k dynamick\u00e9mu a statick\u00e9mu t\u0159en\u00ed, co\u017e bude m\u00edt za n\u00e1sledek vibrace. Nastaven\u00ed st\u0159edov\u00e9 polohy rotoru \u010derpadla lze obecn\u011b dos\u00e1hnout nastaven\u00edm radi\u00e1ln\u00ed polohy lo\u017eiska \u010derpadla. P\u0159i se\u0159izov\u00e1n\u00ed st\u0159edu \u010derpadel podep\u0159en\u00fdch lo\u017eiskov\u00fdmi pouzdry je t\u0159eba sou\u010dasn\u011b zvednout lo\u017eiskov\u00e1 pouzdra na obou stran\u00e1ch \u010derpadla, aby byly spln\u011bny po\u017eadavky. Obecn\u011b plat\u00ed, \u017ee velikost zdvihu je polovina mezery t\u011bsnic\u00edho krou\u017eku, a to na obou stran\u00e1ch. U horizont\u00e1ln\u00edch odst\u0159ediv\u00fdch \u010derpadel s d\u011blenou sk\u0159\u00edn\u00ed lze v p\u0159\u00edpad\u011b pot\u0159eby otev\u0159\u00edt horn\u00ed kryt \u010derpadla a p\u0159\u00edmo zm\u011b\u0159it mezeru u t\u011bsnic\u00edho krou\u017eku. Po se\u0159\u00edzen\u00ed podle po\u017eadavk\u016f vyvrtejte otvory mezi nosi\u010dem lo\u017eiska a t\u011blesem \u010derpadla, abyste mohli nakonfigurovat \u010depy, a pot\u00e9 je znovu smontujte, abyste dos\u00e1hli \u00fa\u010delu p\u0159esn\u00e9ho se\u0159\u00edzen\u00ed.<\/div>\n<\/li>\n
  5. \n
    M\u011b\u0159en\u00ed a se\u0159\u00edzen\u00ed ohybu h\u0159\u00eddele, h\u00e1zivosti a koncov\u00e9 v\u016fle po \u010d\u00e1ste\u010dn\u00e9 mont\u00e1\u017ei rotoru
    Pokud nen\u00ed zji\u0161t\u011bna \u017e\u00e1dn\u00e1 vn\u011bj\u0161\u00ed p\u0159\u00ed\u010dina vibrac\u00ed, lze \u010derpadlo pouze demontovat. Nejprve zm\u011b\u0159te a opravte ohyb h\u0159\u00eddele. Pot\u00e9, co se potvrd\u00ed, \u017ee nen\u00ed \u017e\u00e1dn\u00fd probl\u00e9m, \u010d\u00e1ste\u010dn\u011b sestavte rotor, zm\u011b\u0159te celkovou v\u016fli a koncovou v\u016fli a opravte je, pokud p\u0159ekra\u010duj\u00ed normu.<\/div>\n<\/li>\n
  6. \n
    Detekce dynamick\u00e9 a statick\u00e9 rovnov\u00e1hy
    Po demont\u00e1\u017ei \u010derpadla by se m\u011bl ka\u017ed\u00fd stupe\u0148 ob\u011b\u017en\u00e9ho kola podrobit zkou\u0161ce statick\u00e9ho vyv\u00e1\u017een\u00ed, aby se zabr\u00e1nilo vibrac\u00edm p\u0159i spou\u0161t\u011bn\u00ed \u010derpadla. Pokud to podm\u00ednky dovoluj\u00ed, m\u011bla by b\u00fdt provedena tak\u00e9 zkou\u0161ka dynamick\u00e9ho vyv\u00e1\u017een\u00ed. Zejm\u00e9na u velk\u00fdch v\u00edcestup\u0148ov\u00fdch \u010derpadel je dynamick\u00e1 zkou\u0161ka vyv\u00e1\u017een\u00ed obzvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e1.<\/div>\n<\/li>\n
  7. \n
    Vliv vn\u011bj\u0161\u00edch podm\u00ednek na \u010derpadlo
    Pokud se po vylou\u010den\u00ed v\u0161ech mo\u017en\u00fdch probl\u00e9m\u016f samotn\u00e9ho \u010derpadla st\u00e1le neda\u0159\u00ed probl\u00e9m s vibracemi vy\u0159e\u0161it, je t\u0159eba zv\u00e1\u017eit tak\u00e9 vliv vn\u011bj\u0161\u00edch podm\u00ednek na \u010derpadlo. Nap\u0159\u00edklad: rezonance zp\u016fsoben\u00e1 t\u00edm, \u017ee vlastn\u00ed frekvence z\u00e1kladu \u010derpadla je podobn\u00e1 frekvenci vibrac\u00ed, vibrace \u010derpadla zp\u016fsoben\u00e9 poruchou prim\u00e1rn\u00edho pohonu a abnorm\u00e1ln\u00ed vibrace \u010derpadla zp\u016fsoben\u00e9 nucen\u00fdm vyrovn\u00e1n\u00edm ve spojen\u00ed mezi potrub\u00edm a \u010derpadlem. Obecn\u011b lze k \u0159e\u0161en\u00ed probl\u00e9mu p\u0159ijmout odpov\u00eddaj\u00edc\u00ed opat\u0159en\u00ed.<\/div>\n<\/li>\n<\/ol>\n

    \"4\"<\/p>","protected":false},"excerpt":{"rendered":"

    Causes and solutions for excessive vibration of centrifugal pumps:   Foundation fasteningWhen a defect occurs, first check whether the anchor bolts of the prime mover and the centrifugal pump are securely fastened. If the foundation is unstable, it will inevitably cause the pump to vibrate. When other causes are ruled out but the problem still […]<\/p>","protected":false},"author":4,"featured_media":1463,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[36],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts\/1527"}],"collection":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/comments?post=1527"}],"version-history":[{"count":0,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts\/1527\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media\/1463"}],"wp:attachment":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media?parent=1527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/categories?post=1527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/tags?post=1527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}