xov xwm

Aero engine bearings

Kev Tuavhom

Lub zog ntawm lub cav aero spindle ceev yog siab, qhov kub ntawm qhov kub kawg yog siab, thiabkev coj uayuav tsum tau dais axial load thiab radial load, yog li cov kabmob tau muab faib ua ob pawg: thrust fulcrum bearing thiab swimming fulcrum bearing: thrust fulcrum bearing feem ntau siv peb-point angular contact ball bearing los dais axial load thiab tswj axial clearance ntawm rotating stator; Travelling fulcrum bearings tsuas yog dais radial loads, thiab vim tias lub rotor yuav txav mus rau hauv axial direction vim thermal expansion thiab contraction,cylindrical roller bearingsfeem ntau siv cov uas tsis muaj ciam teb rau sab nraud lossis sab hauv.

 

Cov iav txuas ntxiv ntawm lub cav Aero feem ntau yog tsav los ntawm cov iav spur, thiab cov bearings tsuas yog dais cov khoom thauj radial thiab lub rotor thermal expansion me me, yog licylindrical roller bearingsthiabcov kabmob sib sib zog nqusfeem ntau yog xaiv.

 

Lub gearbox reducer xa ntau lub zog, qee qhov siv cov iav helical, thiab cov bearings yuav tsum dais ob qho tib si radial thiab axial loads, yog licylindrical roller bearings, cov kabmob sib sib zog nqusthiab peb-pointangular tiv tauj pob bearingsfeem ntau yog xaiv.

 

Cov cav aero siv cov kabmob pob peb-taw tes thiabcylindrical roller bearings.

Peb-taw tes kaum sab xis tiv tauj pob bearings

Thaum lub cav aero khiav, lub zog radial thiab lub zog axial yuav tsim tawm ntawm lub spindle, thiab feem ntau yog teeb tsa cov pob bearings ntawm qhov chaw fulcrum pem hauv ntej ntawm lub spindle kom dais lub zog radial uas tsim los ntawm kev sib tshooj ntawm lub zog tsis sib npaug ntawm txhua lub ncej thiab kev sib hloov ceev ceev, thiab tib lub sijhawm dais qhov sib txawv ntawm lub zog axial ntawm lub zog pneumatic ntawm tus kiv cua thiab compressor mus tom ntej thiab lub zog pneumatic rov qab ntawm lub turbine.

 

Kev sib piv ntawm cov qauv ntawm cov kabmob sib sib zog nqus thiab peb-taw tes angular contact pob bearings, qhov chaw nruab nrab ntawm lub nplhaib sab hauv ntawm peb-taw tes angular contact pob bearing yog nruab nrog axial eccentricity Lo, uas ua rau nws cov axial clearance Ga thiab qhov ntau ntawm rotor hauv axial kev taw qhia tsawg dua thiab yooj yim dua los tswj cov axial clearance ntawm lub cav rotating stover.

 

Cov kabmob pob peb-taw tes muaj lub nplhaib ob sab hauv, thiab nws txoj kev tsim qauv sib cais ua rau muaj peev xwm teeb tsa ntau lub pob, ua rau muaj peev xwm dais tau ntau dua.

 

Kev sib piv ntawm cov qauv ntawm cov angular contact pob bearings thiab peb-point angular contact pob bearings, angular contact pob bearings tsuas yog tuaj yeem dais ib txoj kev axial loads, yog tias lawv xav tau dais bidirectional axial loads, lawv yuav tsum tau ua ke, uas yuav siv ntau qhov chaw thiab ua rau qhov hnyav nce; Ob chav thiab ib nrab sab hauv nplhaib ntawm peb-point angular contact pob bearings tuaj yeem ncaj qha dais bidirectional axial loads, uas tuaj yeem txuag tau li 50% ntawm qhov chaw thiab zoo piv nrog ob kab lossis pawg ntawm kev txhawb nqa angular contact pob bearings, thiab yooj yim rau nruab, uas yooj yim rau kev tsim cav.

 

Lub tawb thiab pob sib dhos ntawm peb-taw tes angular contact pob bearing tuaj yeem sib cais los ntawm lub nplhaib sab nraud, yog li ib daim tawb khoom siv tau, uas muaj zog dua, haum rau kev sib hloov ceev siab, thiab yooj yim dua kom tau txais kev ua haujlwm raug siab dua; Tib lub sijhawm, cov qauv kuj ua rau kev teeb tsa thiab kev tshuaj xyuas ntawm cov bearings yooj yim dua.

 

Cov kabmob cylindrical

Piv nrog rau cov cylindrical roller bearings ib txwm muaj, lub cheeb ntawm cov menyuam ntawm aero engine cylindrical roller bearings me dua, thiab nws cov txiaj ntsig yog raws li nram no:

1) Nws tuaj yeem txo qhov kev sib txhuam roj ntawm lub roller thaum lub sijhawm ua haujlwm ceev;

2) Lub zog inertial me me;

3) Lub zog sib cuag txaus tuaj yeem tswj tau thaum lub zog radial me me kom tsis txhob muaj kev sib txhuam ntawm cov menyuam;

4) Vim tias cov khoom siv ferrule, roller thiab cage tuaj yeem sib cais, lub tawb khov kho tuaj yeem siv tau, uas muaj lub zog zoo dua thiab kev ruaj khov ceev.

 

Cov kabmob cylindricalYog tias tsis muaj flange hauv lub nplhaib sab hauv, feem ntau muaj qhov dav ntawm lub nplhaib sab hauv kom haum rau kev txav axial ntawm cov nplhaib sab hauv thiab sab nraud uas tshwm sim los ntawm kev nthuav dav thermal ntawm tus ncej thiab lub nplhaib sab hauv ntawm cov kabmob, nrog rau qhov tsis sib xws ntawm cov nplhaib sab hauv thiab sab nraud uas tshwm sim los ntawm qhov yuam kev sib dhos axial ntawm lub rooj sib dhos rotor thaum lub sijhawm sib dhos. Yog tias qhov chaw teeb tsa me me lossis muaj cov kev xav tau tshwj xeeb, tus ncej lossis lub tsev bearing tuaj yeem siv ncaj qha es tsis txhob siv lub nplhaib sab hauv flangeless.

 

Lub cav aerocylindrical roller bearingsfeem ntau ntsib cov xwm txheej ua haujlwm ntawm me me lossis tsis muaj radial load ntawm radial load, thiab qhov ceev tig yog siab heev, cov rollers yog cov yooj yim rau slippage thiab sib tsoo, txhawm rau tiv thaiv slippage, cov raceways tsis yog voj voog feem ntau siv los paub qhov radial preload ntawm cov kabmob, thiab qhov faib khoom ntawm ob lub raceway tsis yog voj voog feem ntau siv.

 

Cov khoom siv tau

Qhov kub ntawm qhov chaw ua haujlwm ntawm lub cav turbine bearing yog siab heev, thiab feem ntau nws yog qhov tsim nyog los txias lub bearing nrog cov roj nplua nyeem ntawm ntau litres ib feeb, tab sis qhov kub ua haujlwm ntawm lub bearing tseem tuaj yeem ncav cuag li 250 ° C.

 

Yuav kom ua tau raws li qhov kub siab ua haujlwm, lub nplhaib bearing feem ntau siv 8Cr4Mo4V (M50) hlau thiab lwm yam hlau bearing kub siab, thiab kho nrog kub siab tempering, txawm tias qhov kub ntawm bearing ncav cuag 400 ° C tom qab lub cav nres, nws tseem tuaj yeem ua kom ntseeg tau tias kev ua haujlwm ntawm bearing. Yuav kom ua tau raws li lub neej qaug zog ntawm kev dov, qhov nyuaj ntawm qhov chaw ntawm cov khoom siv bearing feem ntau yuav tsum tsis pub tsawg dua 60 HRC ntawm chav tsev kub, thiab tag nrho 8Cr4Mo4V hlau yog hardened los ntawm kev kho cua sov, tab sis qhov toughness qis dua li ntawm cov khoom siv tivthaiv, uas yuav ua rau lub ferrule tawg thaum lub zog centrifugal ntawm ferrule thiab qhov kev ntxhov siab ntawm lub ncej loj. Yog li ntawd, tus nqi dn tshaj 2.5 × 106 hli · r / min bearings yuav tsum tau ua los ntawm G13Cr4Mo4Ni4V (M50NiL) khoom, uas muaj cov tub ntxhais zoo dua toughness.

 

Cov khoom siv ntawm lub tawb ntawm lub cav aero feem ntau yog ua los ntawm cov hlau xws li 40CrNiMoA (4030), thiab lub tawb yuav tsum tau them nrog nyiaj kom txo qhov hnav thaum lub sijhawm pib. Lub ntsiab lus dov yog tib yam li cov khoom siv ferrule, thiab nws qhov nyuaj feem ntau yog tib yam li ntawm ferrule, thiab qee zaum nws yuav siab dua 1 ~ 2 HRC dua li ferrule. Qee zaum lub pob kuj siv cov khoom siv ceramic xws li silicon nitride, alumina, thiab zirconia.