nkhani

Ma bereji a injini ya Aero

Kunyamulamtundu

Liwiro la spindle ya injini ya aero ndi lalikulu, kutentha kwa kutentha kumakhala kwakukulu, ndipochogwiriraimafunika kunyamula katundu wa axial ndi katundu wa radial, kotero bearing imagawidwa m'magulu awiri: thrust fulcrum bearing ndi swimming fulcrum bearing: thrust fulcrum bearing nthawi zambiri imagwiritsa ntchito three-point angular contact ball bearing kuti inyamule katundu wa axial ndikuwongolera axial clearance ya stator yozungulira; Ma fulcrum bearing oyendayenda amanyamula katundu wa radial okha, ndipo chifukwa rotor idzasuntha mbali ya axial chifukwa cha kutentha ndi kufupika,mabearing ozungulira ozunguliraNthawi zambiri amagwiritsidwa ntchito popanda malire pa mphete yakunja kapena yamkati.

 

Ma gearbox owonjezera a injini ya Aero nthawi zambiri amayendetsedwa ndi magiya a spur, ndipo ma bearing amanyamula katundu wozungulira ndipo kukula kwa kutentha kwa rotor ndi kochepa, koteromabearing ozungulira ozungulirandimaberamu a mpira wozama kwambiriamasankhidwa makamaka.

 

Bokosi la gear lochepetsera mphamvu limatumiza mphamvu zambiri, zina mwa izo zimagwiritsa ntchito magiya ozungulira, ndipo mabearing amafunika kunyamula katundu wa radial ndi axial, koteromabearing ozungulira ozungulira, maberamu a mpira wozama kwambirindi mfundo zitatumabearing a mpira wolumikizana ndi angularamasankhidwa makamaka.

 

Ma injini a Aero amagwiritsa ntchito ma bearing a mpira wolumikizana ndi ngodya zitatu ndipomabearing a cylindrical roller.

Mabeya a mpira olumikizana ndi ngodya atatu

Injini ya aero ikagwira ntchito, katundu wa radial ndi katundu wa axial zidzapangidwa pa spindle, ndipo ma bearing a mpira nthawi zambiri amaikidwa pamalo ozungulira kutsogolo kwa spindle kuti azinyamula katundu wa radial wopangidwa ndi superposition ya mphamvu yosalinganika ya shaft iliyonse ndi kuzungulira kwa liwiro lalikulu, ndipo nthawi yomweyo zimakhala ndi kusiyana kwa katundu wa axial pakati pa mphamvu ya pneumatic ya fan ndi compressor kutsogolo ndi mphamvu ya pneumatic kumbuyo kwa turbine.

 

Poyerekeza kapangidwe ka ma bearing a mpira wozama ndi ma bearing a mpira wolumikizana ndi mfundo zitatu, pakati pa groove yamkati ya bearing ya mpira wolumikizana ndi mfundo zitatu ili ndi Lo yozungulira, zomwe zimapangitsa kuti axial clearance yake Ga ndi kuchuluka kwa rotor mu axial direction kukhala kosavuta komanso kosavuta kuwongolera axial clearance ya stover yozungulira ya injini.

 

Chophimba cha mpira cholumikizana ndi ngodya zitatu chili ndi kapangidwe ka mphete yapakati kawiri, ndipo kapangidwe kake kosiyana ka mphete yamkati kamalola kuyika mipira yambiri, zomwe zimawonjezera kwambiri mphamvu yoberekera.

 

Poyerekeza kapangidwe ka ma bearing a mpira wolumikizana ndi ma bearing a mpira wolumikizana ndi mfundo zitatu, ma bearing a mpira wolumikizana ndi mfundo zitatu amatha kunyamula katundu wa axial wolunjika mbali imodzi, ngati akufunika kunyamula katundu wa axial wolunjika mbali ziwiri, ayenera kuphatikizidwa, zomwe zimatenga malo ambiri ndikuwonjezera kulemera; Mphete ziwiri ndi theka zamkati za ma bearing a mpira wolumikizana ndi mfundo zitatu zimatha kunyamula katundu wa axial wolunjika mbali ziwiri mwachindunji, zomwe zingasunge pafupifupi 50% ya malo ndi khalidwe poyerekeza ndi mizere iwiri kapena gulu la ma bearing a mpira wolumikizana ndi mfundo ziwiri, ndipo ndizosavuta kuyika, zomwe ndizosavuta kupanga injini.

 

Khola ndi gulu la mpira la chogwirira cha mpira cholumikizana ndi mfundo zitatu zitha kulekanitsidwa ndi mphete yakunja, kotero khola lolimba la chidutswa chimodzi lingagwiritsidwe ntchito, lomwe lili ndi mphamvu zambiri, liyenera kuthamanga kwambiri, ndipo ndi losavuta kupeza kulondola kwakukulu kwa makina; Nthawi yomweyo, kapangidwe kake kamapangitsanso kuyika ndi kuyang'ana ma bearing kukhala kosavuta.

 

Mabeya ozungulira a cylindrical

Poyerekeza ndi mabearing roller roller wamba a makina, m'mimba mwake wa mabearing roller a injini ya aero ndi wocheperako, ndipo ubwino wake ndi motere:

1) Ikhoza kuchepetsa kukana kwa mafuta kwa chopukutira panthawi yogwira ntchito mwachangu kwambiri;

2) Mphamvu ya inertial ndi yochepa;

3) Kupanikizika kokwanira kokhudzana ndi chinthu kumatha kusungidwa pamene mphamvu ya radial ndi yaying'ono kuti tipewe kutsetsereka kwa roller;

4) Popeza zigawo za ferrule, roller ndi khola zitha kulekanitsidwa, khola lolimba lingagwiritsidwe ntchito, lomwe lili ndi mphamvu yabwino komanso kukhazikika kwachangu.

 

Mabeya ozungulira a cylindricalPopanda flange mu mphete yamkati nthawi zambiri imakhala ndi m'lifupi mwake wa mphete yamkati kuti igwirizane ndi kayendedwe ka axial pakati pa mphete zamkati ndi zakunja zomwe zimayambitsidwa ndi kutalika komwe kumachitika chifukwa cha kufalikira kwa kutentha pakati pa shaft ndi mphete yamkati ya bearing, komanso kusalingana pakati pa mphete zamkati ndi zakunja komwe kumachitika chifukwa cha cholakwika cha axial assembly cha rotor assembly panthawi yosonkhanitsa. Ngati malo oyikapo ndi ochepa kapena pali zofunikira zapadera, shaft kapena bearing housing ingagwiritsidwe ntchito mwachindunji m'malo mwa mphete yamkati yopanda flange.

 

Injini ya ndegemabearing ozungulira ozunguliraNthawi zambiri amakumana ndi mikhalidwe yogwirira ntchito ya katundu wochepa kapena wopanda radial, ndipo liwiro lozungulira ndi lalikulu kwambiri, ma roller amatha kutsetsereka ndi kukanda, kuti apewe kutsetsereka, njira zoyendera zosakhala zozungulira nthawi zambiri zimagwiritsidwa ntchito kuti zikwaniritse radial preload ya bearing, ndipo kugawa katundu wa ma bearing awiri wamba osazungulira nthawi zambiri kumagwiritsidwa ntchito.

 

Zinthu zonyamulira

Kutentha kwa malo ogwirira ntchito kwa bearing ya turbine ya injini kumakhala kokwera kwambiri, ndipo nthawi zambiri kumakhala kofunikira kuziziritsa bearing ndi mafuta odzola a malita angapo pamphindi, koma kutentha kwa bearing kumatha kufika pafupifupi 250 °C.

 

Kuti ikwaniritse momwe ntchito imagwiritsidwira ntchito kutentha kwambiri, mphete yoperekera nthawi zambiri imagwiritsa ntchito chitsulo cha 8Cr4Mo4V (M50) ndi chitsulo china choperekera kutentha kwambiri, ndipo imakonzedwa ndi kutentha kwambiri, ngakhale kutentha kwa bere kufika 400 °C injini itayimitsidwa, imathabe kuonetsetsa kuti bere likugwira ntchito bwino. Kuti ikwaniritse moyo wotopa wozungulira, kuuma kwa pamwamba pa zinthu zoperekera nthawi zambiri kumafunika kukhala osachepera 60 HRC kutentha kwa chipinda, ndipo chitsulo chonse cha 8Cr4Mo4V chimaumitsidwa ndi kutentha, koma kulimba kwake kumakhala kotsika kuposa kwa zinthu zomangira, zomwe zimapangitsa kuti ferrule isweke pamene mphamvu ya centrifugal ya ferrule ndi kupsinjika kwa shaft kuli kwakukulu. Chifukwa chake, mtengo wa dn umaposa 2.5×106 mm · ma bearing a r/min ayenera kupangidwa ndi zinthu za G13Cr4Mo4Ni4V (M50NiL), zomwe zimakhala ndi kulimba kwabwino kwapakati.

 

Zipangizo za khola la ma bearing a injini ya aero nthawi zambiri zimapangidwa ndi chitsulo chomangidwa monga 40CrNiMoA (4030), ndipo khola liyenera kupakidwa siliva kuti lichepetse kuwonongeka panthawi yoyambira. Chinthu chozungulira chimakhala chofanana ndi zinthu za ferrule, ndipo kuuma kwake nthawi zambiri kumakhala kofanana ndi kwa ferrule, ndipo nthawi zina kumakhala kokwera ndi 1 ~ 2 HRC kuposa ferrule. Nthawi zina mpirawo umagwiritsanso ntchito zinthu zadothi monga silicon nitride, alumina, ndi zirconia.