Threaded kev twb kev txuas sealing tsis ua hauj lwm yog hais txog kev maj mam loosening ntawm txiv neej thiab poj niam xov khub nyob rau hauv thermal voj voog kev co, nruab nrab siab hloov thiab nkag mus so ntawm sealing muab tub lim. Lub pre-tightening quab yuam ntawm xov txo qis tsis tu ncua, qhov sib txawv ntawm qhov chaw haum nthuav dav, thiab cov txheej txheem nruab nrab xau tawm sab nraud raws cov xov clearance. Hauv qhov xwm txheej hnyav, cov xov tsis cuam tshuam tag nrho thiab cov raj xa dej poob, ua rau cov khoom xau, cov khoom siv kaw thiab txawm tias muaj kev nyab xeeb. Qhov kev ua tsis tiav no feem ntau tshwm sim hauv cov kab sib txuas ntawm cov kav dej thiab cov twj paj nruag, uas yog ib qho kev phom sij zais hauv cov qauv sib dhos ntawm cov kav dej cua sov.
1. Loosening thiab Leakage Evolution Mechanism
Tom qab cov xov yog screwed nyob rau hauv qhov chaw, cov xov hniav bears extrusion preload rau compress cov ntaub ntawv raw khoom los yog gasket los tsim ib tug kaw sealing nto. Thaum rov ua cua sov thiab txias, qhov sib txawv ntawm thermal expansion coefficient ntawm cov yeeb nkab lub cev thiab threaded fittings ua rau lub sij hawm txheeb ze micro- txav ntawm cov hniav xov. Qhov cuam tshuam ntawm qhov system siab thiab kev co txhua yam yuav ntxiv shear lub meshing qauv ntawm threads. Thawj zaug ua ntej-tightening stress maj mam tso tawm thiab so, lub compression npaum li cas ntawm cov sealing nruab nrab txo, thiab me me nkag mus rau hauv lub sealing nto. Cov kua nruab nrab tsis tu ncua seeps raws cov kauv xov sib txawv. Nrog rau qhov poob ntawm sealing muab tub lim thiab nruam hnav ntawm cov hniav hniav, lub ntim ntim nce ib hnub twg, thiab nws thiaj li cov xov kiag li poob meshing restraint thiab ntog tawm nyob rau hauv lub siab thrust.
2. Cov hauj lwm zoo ib yam ua rau cov xov xoob xoob tsis ua tiav
Ceg yeeb nkab threaded pob qij txha thiab me me - tho qhov ntsuas coj - tawm kev cuam tshuam nrog kev hloov pauv tsis tu ncua;
Threaded qhov chaw nyob ze ntawm lub twj tso kua mis thiab cov khoom vibrating raug rau ntev - lub sij hawm txhua yam kev co;
Xov sib txuas hauv siab - qhov kub thiab txias alternating kub aav nrog pom tseeb thermal expansion thiab contraction;
Threaded luj tshib, reducers thiab hloov dua siab tshiab adapters bearing dabtsi yog khoov lub sij hawm thiab ntxiv rub quab yuam;
Tshaj -Tightened threaded seem nrog yas deformation ntawm xov hniav ua rau kom tsis muaj zog mus tas li.
3. Qhov tseem ceeb Inducing Factors Accelerating Loosening puas
Tsis muaj kev tiv thaiv- xoob ntsuas tom qab xov screwing, tsuas yog nyob ntawm cov xov ntshiab meshing rau fixation;
Ntau dhau los yog tsis txaus pib zawm torque, ua rau cov hniav puas tsuaj los yog tsis txaus sealing compression;
Ntev -Lub sij hawm kub hloov pauv thiab cov khoom siv vibration ua rau kom tsis tu ncua attenuation ntawm pre-tightening quab yuam;
Kev xaiv tsis raug ntawm sealing muab tub lim, uas muaj hnub nyoog, hardens thiab poob elasticity nyob rau hauv qhov kub thiab txias;
External pipeline load thiab dabtsi yog khoov quab yuam ncaj qha rau ntawm threaded sib koom ua ke los tsim shear torque.
4. Tag nrho -Txuas Kev Tiv Thaiv thiab Tswj Kev Ntsuas Kev Ntsuas
① Standardize torque- tswj kev ua haujlwm nruj
Siv lub torque ciaj ntswj los siv cov ntsuas ntsuas lub zog kom tsis txhob muaj xov zawv zawg thiab tsis txaus compression.
② Ntxiv xov los tiv thaiv -loosing auxiliary ntsuas
Lub tsho tiv no siab -kub resistant xov xauv los yog nruab lub xauv ceev tom qab sib dhos kom txwv kev sib hloov.
③ Xaiv qhov kub thiab txias resistant thiab aging resistant sealing cov ntaub ntawv
Txais PTFE xov kab xev los yog saj zawg zog graphite sealing muab tub lim haum rau kev ua haujlwm kub.
④ Txo cov load sab nraud ntxiv ntawm cov pob qij txha
Teem cov kev txhawb nqa ywj pheej nyob ze ntawm threaded fittings kom dais qhov hnyav thiab khoov kev nyuaj siab.
⑤ Npaj kev tshuaj xyuas tsis tu ncua thiab rov- zawm thaum kho cov khoom siv
Txheeb xyuas cov ntsiab lus xau thiab rov ua kom nruj zog rau kev sib txuas ntawm cov xov txuas ib ntus.
5. Kev Tiv Thaiv Cov Teeb Meem Sib piv
表格
| Kev sib dhos & Kev tu hom | Xov Loosening Leakage Risk | Daim ntawv thov tswv yim |
|---|---|---|
| Random tes zawm + tsis muaj kev tiv thaiv -txoj kev kho + tsis muaj sijhawm tshuaj xyuas | Fast leakage thiab txawm xov detachment thaum ua haujlwm | Tighten nrog tus qauv torque thiab ntxiv los tiv thaiv -loosing kua nplaum tam sim ntawd |
| Torque fastening + anti-loosing kho + kev tshuaj xyuas tsis tu ncua | Ua zoo txwv txoj xov loosening thiab nruab nrab to | Standard installation specification rau threaded pipeline interfaces |
| Ob chav txiv ntoo xauv + hloov tau yooj yim sealing + ywj siab thauj khoom-cov kabmob txhawb nqa | Tsawg kawg sealing tsis ua haujlwm nyiam | Kev vibration thiab kub kub ua hauj lwm tej yam kev mob nyiam lub tswv yim |
Xaus
Threaded kev twb kev txuas tsis ua hauj lwm ntawm 316 stainless hlau cua sov raj yog feem ntau tshwm sim los ntawm pre- zawm quab yuam attenuation induced los ntawm thermal voj voog, kev co thiab kev ntxhov siab so, ua rau lub sealing nto tsis ua hauj lwm thiab xov meshing loosening. Cov tswv yim tiv thaiv tseem ceeb muaj xws li kev sib dhos torque, txhim khu kev qha los tiv thaiv -loosing locking configuration, txuam siab - kub sealing cov ntaub ntawv, cais sab nraud bending load thiab tsis tu ncua ntawm - chaw soj ntsuam thiab tu. Tag nrho- txheej txheem tswj kev teeb tsa thiab kev tswj xyuas kev saib xyuas txhua hnub tuaj yeem tshem tawm cov kev sib tsoo uas tshwm sim los ntawm threaded sib koom ua haujlwm tsis ua haujlwm ntawm cov kav dej cua sov.
