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Ma Bearing Othandizira VS Ma Bearing Othandizira

 

1. Mabearing Othandizira ndi Ntchito Yawo

Ma bereki othandizirandi gawo lofunika kwambiri la turbine ya nthunzi. Chotengera chachikulu chimatchedwanso chotengera cha radial.

Ntchito yake ndikuthandizira kulemera konse kwa rotor ndi mphamvu ya centrifugal yomwe imachitika chifukwa cha kusalinganika kwa mass rotor, komanso kudziwa malo oyenera a radial a rotor mkati mwa silinda. Popeza bearing iliyonse iyenera kupirira katundu wambiri ndipo shaft journal imazungulira mofulumira kwambiri, ma bearing a turbine ya nthunzi amagwiritsa ntchito ma bearing otsetsereka amtundu wa journal kutengera mfundo ya mafuta odzola. Filimu yamafuta odzola opanikizika imapangidwa pakati pa shaft journal ndi bearing, zomwe zimapangitsa kuti madzi azikangana kuti zitsimikizire kuti turbine ya nthunzi ikugwira ntchito bwino komanso mokhazikika.

 

Pali mitundu inayi ikuluikulu ya ma bearing a turbine main: ma bearing a cylindrical shell support, ma bearing a elliptical shell support, ma bearing a three-oil wedge support bearing, ndi ma bearing a tilting pad support bearing.

 

2. Ntchito yaMaberamu Opondereza

Ntchito ya chogwirira cha thrust ndi kupirira kugwedezeka kwa axial kwa rotor panthawi yogwira ntchito komanso kudziwa ndikusunga malo ozungulira a axial a rotor ya turbine ndi silinda.

 

Maberiyani oyendetsedwa ndi thrust angapangidwe ngati mayunitsi odziyimira pawokha kapena kuphatikiza ndi maberiyani othandizira kukhala yuniti imodzi, yotchedwa beriyani yolumikizidwa (thrust-support combined).

Mwa kapangidwe kake, zimatha kukhala ndi magawo ambiri kapena mawonekedwe ofanana ndi gawo; pakadali pano, mtundu womwe umagwiritsidwa ntchito kwambiri ndi bearing yofanana ndi gawo. Zigawo zake zazikulu ndi ma working pads, ma non-working pads, ma adjustment shims, ndi ma mounting rings.

 

Mbali zonse ziwiri za thirakiti, ma pad ogwirira ntchito khumi mpaka khumi ndi awiri ndi osagwira ntchito amayikidwa. Pad iliyonse imayikidwa pa mphete yoyikira; ma pad ogwirira ntchito amakhala ndi thirakiti yotsogola ya rotor, ndipo ma pad osagwira ntchito amakhala ndi thirakiti yobwerera kumbuyo ya axial.

 

Ma pads osagwira ntchito a thrust bearing nthawi zambiri samakhala ndi mphamvu iliyonse. Komabe, pamene mphamvu ya turbine ikuchepa mwadzidzidzi, monga pamene katundu wakanidwa, turbine ikhoza kugwedezeka mbali ina ya mpweya. Panthawiyi, ma pads osagwira ntchito, kudzera mu filimu yawo yamafuta yooneka ngati wedge, amathandiza kulinganiza gawo ili la axial thrust, kuteteza kusuntha kwakukulu kwa turbine kutsogolo ndikupewa kugundana ndi kuwonongeka pakati pa zigawo zoyenda ndi zosakhazikika.

 

3. Magawo Oyang'anira TSI Panthawi Yogwira Ntchito ya Steam Turbine

1. Kutentha kwachitsulo chothandizira <105°C.

2. Kutentha kwachitsulo chonyamula katundu < 100°C.

3. Kutentha kwa nkhope yogwirira ntchito kwa ma thrust pads <100°C.

4. Kutentha kwa nkhope kosagwira ntchito kwa ma thrust pads <100°C.

5. Kusuntha kwa Axial < 1.2 mm ndi > -0.6 mm.

6. Kukulitsa kusiyana kwa silinda yamphamvu kwambiri komanso yapakati < 6 mm ndi > -3 mm.

7. Kugwedezeka kwa chivundikiro cha bearing < 0.05 mm, kugwedezeka kwa dongosolo la shaft < 125μm.

8. Kupatuka pakukulira kwa masilinda akumanzere ndi akumanja kuyenera kukhala kochepa.