Uphethiloli werokhethi udlala indima ebalulekile emisebenzini yokuhlola isikhala. Eminyakeni edlule, izinhlobo ezahlukene zama-rocket propellant ziye zathuthukiswa futhi zahlolwa ukuze kufezwe ukusebenza kahle kanye nokusebenza kahle. Enye yalezi propellant yi-HTPB, emele i-hydroxyl-terminated polybutadiene. Ngenxa yezakhiwo zayo ezinhle kakhulu, iwuphethiloli osetshenziswa kakhulu kuma-rocket motor aqinile.
I-HTPB rocket fuel iyi-propellant ehlanganisiwe eyakhiwe yi-binder, i-oxidizer kanye ne-powdered metal fuel. I-binder (okungukuthi i-HTPB) isebenza njengomthombo kaphethiloli futhi inikeza ubuqotho besakhiwo ku-propellant. Iqukethe i-polymer yeketanga elide eyenziwe ngokuphendula i-butadiene ne-alcohol, iyinika izakhiwo ezifiselekayo eziqedwa yi-hydroxyl.
Esinye sezici eziyingqayizivele ze I-HTTPBokuqukethwe kwayo kwamandla aphezulu. Inokushisa okuphezulu kokusha, okusho ukuthi ingakhipha inani elikhulu lamandla uma ishiswa. Lokhu kuyenza ibe yindawo efanele ukuqhutshwa kwerokhethi, njengoba amandla amaningi ipropellant ewakhiqizayo, kulapho ukusunduza okungafinyelelwa khona kuphakeme.
Ngaphezu kwalokho, i-HTPB ayizweli kakhulu ekushaqekeni nasekungqubuzaneni, okwenza ibe yi-propellant ezinzile nephephile. Ukuqina kwayo kubalulekile ngesikhathi sokugcina nokuthuthwa, futhi noma yimuphi umlilo ongengozini ungaba nemiphumela emibi kakhulu. Ukuzwela okuphansi kwe I-HTTPBivumela izinga eliphezulu lokuphepha kokusebenza uma kuqhathaniswa nezinye izinhlobo ze-propellant.
Enye inzuzo yokuthi I-HTTPBKu-fuel yerokhethi yikhono layo lokuphonswa ngezimo nobukhulu obuhlukene. Ingabunjwa kalula ibe yi-geometri yezinhlayiya ezifanele imiklamo nezimfuneko ezithile zerokhethi. Lokhu kuguquguquka kokukhiqiza kuvumela onjiniyela ukuthi bahlele ama-propellant ukuze bathuthukise amazinga okusha futhi bafinyelele izici zokusebenza ezifiselekayo.
Ukushisa i-HTPB enjinini yerokhethi kukhiqiza igesi eningi kanye nentuthu eningi. Intuthu ekhiqizwa ama-propellant asekelwe ku-HTPB iwumphumela wokusha okungaphelele kanye nokuba khona kwezinto ezisele eziqinile. Nakuba intuthu ingase ingabi yinto efanele kwezinye izinhlelo zokusebenza, ingaba yinzuzo ekuhlinzekeni ngokulandelela okubonakalayo kwendlela irokhethi elihamba ngayo ngesikhathi sokwethulwa.
Ngaphezu kwalokho, I-HTTPBuphethiloli werokhethi ubonisa izinga lokusha eliphansi kakhulu. Leli zinga lokusha elilawulwayo livumela ukusatshalaliswa kokusunduza okulawulwayo nokubikezelwayo, okubaluleke kakhulu ezinhlelweni ezidinga ukulawulwa okunembile kanye nokushelela. Onjiniyela bangaklama ngokunembile indlela yerokhethi kanye nendlela yokundiza, bathuthukise impumelelo yomsebenzi wonke.
Nakuba uphethiloli werokhethi we-HTPB unezinzuzo eziningi, futhi unemikhawulo ethile. Omunye umkhawulo uwukushukuma kwawo okuqondile okuphansi uma kuqhathaniswa nezinye izinhlobo ze-propellant. Ukushukuma okuqondile kuyindlela yokulinganisa ukuthi i-propellant iguqula kanjani isisindo sikaphethiloli sibe yi-thrust. Nakuba i-HTPB inikeza ukushukuma okuhle okuqondile, kunezinye izi-propellant ezinganikeza amanani aphezulu okushukuma okuqondile.
Isikhathi sokuthunyelwe: Novemba-05-2023