Maberamu a Mpira Ogwira Ntchito Mwachangu

Ma bereki ozungulira opindika amagawidwa m'magulu atatu:

· Mzere umodzi

· Mizere iwiri

· Mizere inayi

Magawo akuluakulu a ma roller bearings opindika akonzedwa bwino, zomwe zawonjezera chiwerengero cha ma roller ndi kutalika kwawo kogwira ntchito. Kapangidwe kabwino ka ma roller ndi misewu ya raceways kamathandizira kwambiri kukhudzana kwa geometric, kugawa kwa kupsinjika, komanso kupanga filimu yamafuta, zomwe zimapangitsa kuti ma roller mayendedwe azikhala bwino. Chifukwa chake, poyerekeza ndi mitundu yakale ya kukula komweko, ma bearings awa amapereka mphamvu zambiri zonyamula katundu komanso moyo wautali wautumiki.

Maberiya ozungulira okhala ndi mizere iwiri amatha kupirira katundu wophatikizana wa radial ndi axial (makamaka radial) komanso katundu wa axial wa bidirectional. Chopachika chimayikidwa pakati pa mphete ziwiri zamkati, zomwe zimathandiza kusintha malo ndi kugawa katundu mofanana mwa kusintha makulidwe a spacer. Maberiya awa ndi oyenera kugwiritsidwa ntchito pa liwiro lapakati mpaka lotsika.

Ma bearing a mpira wopindika mbali ziwiri ndi ma bearing olekanitsidwa. Amapangidwa ndi:

· Chotsukira cha shaft chimodzi chokhala ndi mipata mbali zonse ziwiri

· Makina awiri ochapira nyumba

· Mipando iwiri ya mpira ndi khola

Ma bearing awa amatha kunyamula katundu wa axial wa mbali ziwiri koma sanganyamule katundu wa radial uliwonse. Amapereka malo a axial a mbali ziwiri a shaft.

Zipangizo zotsukira nyumba ndi zomangira za mpira ndi khola ndizofanana ndi zomwe zimagwiritsidwa ntchito mu ma bearing oyenda mbali imodzi.

Miyeso yoyambira ya mabearing a mpira woponderezedwa omwe ali m'matebulo akutsatira ISO 104.

Ma bearing a mpira wokhazikika amapangidwa kuti azitha kupirira P0. Mukapempha, ma bearing okhala ndi ma grade olondola kwambiri monga P6, P5, kapena P4 angaperekedwe. Ma grade olekerera a grade iliyonse akhoza kutchulidwa mu miyezo.

Ma bearing a mpira wothrust amagwiritsa ntchito ma cage achitsulo kapena ma cage amkuwa opangidwa ndi makina. Zipangizo za khola kuti mudziwe zambiri zaperekedwa mu tebulo ili m'munsimu.

Pa nthawi yogwira ntchito, mphamvu zopanda mphamvu zingayambitse kutsetsereka pakati pa mipira ndi mipikisano, zomwe zimapangitsa kuti kutentha kuchuluke komanso kuwonongeka kwa malo ogwirira ntchito. Pofuna kupewa izi, muyenera kugwiritsa ntchito mphamvu zochepa za axial F_{amin}:

F_{a min} \geq A \left( \frac{n_{max}}{1000} \right)^2

Kumene:

· F_{a min}: Kulemera kochepa kwa axial (kN)

· A: Chiwerengero chochepa cha katundu (chomwe chili m'matebulo a miyeso ya bere)

· n_{max}: Liwiro lalikulu kwambiri logwira ntchito (rpm)

Kulemera kwa zinthu zothandizira pamodzi ndi mphamvu zakunja nthawi zambiri kumaposa katundu wocheperako. Ngati sichoncho, katundu woyambirira ayenera kugwiritsidwa ntchito (monga kugwiritsa ntchito masika).

Pa ma bearing a mpira oyendetsedwa ndi njira imodzi ndi ziwiri:

P_0 = F_a

Pa ma bearing a mpira oyendetsedwa ndi njira imodzi ndi ziwiri:

P = F_a"