Dab tsi yog cov yam ntxwv ntawm lub cev tsis muaj zog rotor?

Muaj ntau qhov laj thawj tshwj xeeb rau qhov tsis sib xws ntawm rotor. Raws li tus txheej txheem ntawm qhov tsis sib npaug, nws tuaj yeem muab faib ua qhov qub tsis sib npaug, qhov tsis sib xws, qhov tsis sib xws tam sim, thiab qhov tsis sib xws.

a) Static imbalance: -Qhov loj axis ntawm lub rotor tsis coincide nrog lub axis ntawm kev sib hloov, thiab muaj ib tug tej yam eccentricity, tab sis lub loj axis thiab lub axis ntawm kev sib hloov yog parallel mus rau lub rotor ntev L, yog li qhov imbalance yuav tshwm sim. ntawm ib lub dav hlau, uas ua rau cov kabmob ntawm ob qho kawg ntawm lub zog centrifugal nyob rau hauv tib txoj kev, thiab qhov sib npaug tuaj yeem raug kho los ntawm ib lub dav hlau.

b) Txawm tias tsis sib npaug: -Qhov loj ntawm lub rotor tsis coincide nrog lub axis ntawm kev sib hloov, tab sis cuam tshuam qhov nruab nrab ntawm lub ntiajteb txawj nqus ntawm lub rotor. Lub zog centrifugal generated yog sib npaug rau cov kabmob ntawm ob qhov kawg thiab 180 degrees rov qab.

c) Qhov tseeb qhov tsis sib xws: -Qhov loj axis ntawm lub rotor thiab lub axis ntawm kev sib hloov tsis sib tshuam, tsis sib npaug thiab tsis sib npaug, thiab lub zog centrifugal tsim los ntawm qhov tsis sib xws ua rau ob lub dav hlau. Nws tuaj yeem txiav txim siab tias qhov kev tsis sib haum xeeb yog qhov sib xyaw ua ke ntawm qhov tsis sib xws thiab ob peb qhov tsis sib xws. , Hom dynamic imbalance no feem ntau yog nyob rau hauv kev lag luam ntau lawm.

Txhua hom kev tsis sib npaug ntawm lub rotor tuaj yeem raug kho los ntawm Jizhi ntsuas tshuab. Qhov tsis sib npaug ntawm lub rotor tuaj yeem raug kho los ntawm Jizhi rotor dynamic ntsuas tshuab, kom qhov kev vibration generated thaum lub rotor rotates los yog kev co ua rau ntawm cov kabmob yog txo kom tso cai nyob rau hauv lub Scope, thiaj li ua tiav lub hom phiaj ntawm kev txo kev co, kev txhim kho. kev ua tau zoo thiab txhim kho cov khoom zoo.

Cov tshuab ua pa muaj ntau qhov sib hloov, xws li ntau yam kis tau tus mob shafts, lub ntsiab shafts, hluav taws xob motors, thiab chav turbine rotors, uas yog sib sau ua ke hu ua rotating lub cev. Hauv kev siv tswv yim, ntau lub cev hloov pauv tsis sib npaug vim muaj ntau yam xws li cov khoom tsis sib xws lossis qhov tsis xws luag, kev ua yuam kev thiab kev sib dhos, thiab txawm tias asymmetrical geometric duab thaum tsim.

Txawm hais tias nws muaj qhov sib npaug, lub zog centrifugal inertial tsim los ntawm txhua qhov me me ntawm lub cev hloov pauv tsis tuaj yeem tshem tawm ib leeg thaum lub cev tig tig, ua rau lub zog centrifugal tsis sib npaug, uas ua rau muaj qhov tsis sib xws. Cov nram qab no editor luv luv qhia dab tsi yog cov yam ntxwv ntawm rotor imbalance?

Random unbalance feem ntau tshwm sim los ntawm loosening ntawm rotor qhov chaw. Thaum lub rotor qhov chaw yog xoob, nws yuav ua rau muaj kev hloov pauv ntawm qhov sib npaug ntawm lub rotor. Nws cov yam ntxwv vibration qhia qee zaus thiab qee zaum tsis tuaj. Nws yog tib yam li qhov amplitude ntsuas los ntawm rotor ntawm lub sijhawm sib txawv. (Los yog theem) hloov ntawm qhov loj mus rau me me, thiab qhov kev vibration tsis muaj kev hloov pauv tshwj xeeb. Lub ntsiab yam ntxwv ntawm rotor unbalance yog raws li nram no:

(1) Cov yam ntxwv ntawm kev vibration zaus spectrum: Qhov teeb meem ntawm qhov tsis sib npaug feem ntau yog siab dua qhov kev vibration dominates, thiab nws cov zaus vibration feem ntau ntau dua los yog sib npaug rau ntau tshaj 80% ntawm nws qhov kev vibration zaus.

(2) Lub zog tsis sib npaug muaj qee qhov kev taw qhia. Lub zog centrifugal yog qhov tseem ceeb sib xws hauv cov kev taw qhia radial. Txoj kev khiav ntawm lub ncej thiab cov kabmob txhawb nqa yog kwv yees li ib lub voj voog. Txawm li cas los xij, vim hais tias qhov kev txhawb nqa ntsug ntawm lub rooj zaum muaj zog ntau dua li txoj kab rov tav, qhov qub ncej Thiab txoj kev ntawm cov kabmob txhawb nqa yog elliptical, uas yog, nyob rau hauv ib txwm muaj, txoj kab rov tav vibration yog 1.5 mus rau 2 zaug loj dua li ntsug. kev vibration. Yog tias nws tshaj qhov ntau, tej zaum yuav muaj lwm yam teeb meem, tshwj xeeb tshaj yog teeb meem resonance.

(3) Kev sib piv radial thiab axial kev co, thaum qhov tsis sib xws yog qhov tseem ceeb, qhov kev vibration radial (kab rov tav thiab ntsug) yog qhov loj dua qhov kev co axial (tshwj tsis yog cantilever rotors).

(4) Lub directionality ntawm lub cantilever rotor unbalance teeb meem. Nyob rau hauv ib txwm muaj xwm txheej, radial thiab axial vibrations kuj loj. Nws yog ib txhij muaj nyob ntawm static unbalance thiab ob peb unbalance, yog li ob lub dav hlau feem ntau xav tau rau kev sib npaug.

(5) Rau lub rotor nrog cov teeb meem kev co tsis sib npaug, nws cov theem vibration yog ruaj khov thiab rov ua dua.

(6) Qhov teeb meem tsis sib npaug yuav ua rau kom tus nqi resonance amplitude. Yog hais tias lub rotor' qhov kev ua hauj lwm ceev yog ze rau lub resonance point ntawm lub system' lub ntuj zaus, ib tug me me ntawm unbalance vibration yuav nce los ntawm 10 mus rau 50 lub sij hawm.

(7) Lub sijhawm ua haujlwm ntawm qhov teeb meem rotor tsis txaus. Qhov ntsug thiab kab rov tav theem sib txawv ntawm tib txoj haujlwm bearing yog li 90 °, thiab theem sib txawv ntawm cov kabmob ntawm ob sab hauv tib txoj kev yog sib npaug.