labarai

Menene buƙatun musamman ga bearings na injin jirgin sama, da kuma yadda ake cimma juriyar zafi mai yawa da kuma shafa man shafawa?

 

Da farko dai, bari mu fahimci yanayin aiki na injunan jirgin sama:

 

1. Babban gudu, saurin injin jirgin sama na yau da kullun ya fi 18000 rpm, kuma buƙatun kayan suna da yawa sosai a irin wannan babban gudu.

 

2. Zafin jiki mai yawa, zafin aikin injin yana da yawa sosai, zafin aikin bearing kuma yana iya kaiwa 300 °C, kayan bearing suna buƙatar su iya jure zafi mai yawa.

 

3. Babban inganci, ko jirgin sama ne na farar hula ko jirgin yaƙi, buƙatun aminci suna da yawa, kuma ɗan bambanci a cikin tafkin lamari ne na rayuwar ɗan adam.

 

Sabodababban zafin aiki na ɗaukar kaya, an yi zoben waje da kayan AISI M50 tare da juriya mai yawa ga zafin jiki da kwanciyar hankali mai yawa, wanda har yanzu yana iya kaiwa ga taurin 58HRC a 300°C.

Lokacin da ake gudu da sauri, saboda zoben ciki na bearing yana juyawa, ƙarfin centrifugal yana da girma sosai, kuma ɓangaren giciye na zoben ciki na bearing yana ɗauke da matsin lamba na hoop, don haka babu wani tsagewar microscopic a saman zoben ciki don guje wa yaɗuwar tsagewa a ƙarƙashin matsin lamba, don haka ana amfani da kayan AISI M50NiL sau da yawa azaman zoben ciki.

 

Saboda tsananin gudu, domin rage ƙarin nauyin da ƙarfin centrifugal na ƙwallon ƙarfe ke kawowa, ana amfani da kayan yumbu masu sauƙin nauyi da tauri mai yawa, kamar silicon nitride (Si3N4) ko titanium carbide (TiC), gabaɗaya a matsayin kayan ƙwallon ƙarfe, kuma wani lokacin don ƙara juriyar lalacewa na zoben ciki da na waje na bearing da rage gogayya, ana fesa hanyoyin tsere na zoben ciki da na waje da yumbu.

 

Zafin injin zai iya kaiwa sama da 300 °C, mafi girman shine sama da 1500 °C, yadda ake ɗaukar zafin shine kawai 300 °C, wannan shine ƙimar tsarin shafawa, a zahiri, tsarin shafawa mai ɗaukar nauyi shima yana da babban aiki shine sanyaya.

Wani ɓangare na shi shine man shafawa, man shafawa na injin yana kama da man shafawa na bearings na gabaɗaya, saboda saurin bearings yana da yawa, ba za a iya amfani da hatimin hulɗa ba, don haka bearings na injin hanya ce ta hatimin labyrinth, amma man shafawa da yake amfani da shi ya fi kyau, saboda zafin aiki yana da yawa, man shafawa na gabaɗaya yana da sauƙin oxidize da lalacewa, don haka galibi ana amfani da shi man roba MIL-PRF23699HTS.

 

Idan kuna son ƙarin bayani game da waɗannan abubuwan, tuntuɓi mu:
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