Piston.
Piston bụ mmegharị na-emegharị ahụ n'ime ahụ cylinder nke injin ụgbọ ala. Enwere ike kewaa ntọala nke piston n'elu, isi na uwe mwụda. N'elu piston bụ akụkụ bụ isi nke ụlọ ọkụ ọkụ, na ọdịdị ya metụtara ụdị ụlọ ọkụ ahọpụtara. Igwe mmanụ ụgbọala na-ejikarị piston elu dị larịị, nke nwere uru nke obere mpaghara nnabata okpomọkụ. Diesel engine piston n'elu na-enwekarị olulu dị iche iche, ọdịdị ya kpọmkwem, ọnọdụ ya na nha ya ga-abụrịrị na ngwakọta mmanụ dizel na ihe ọkụ chọrọ.
Piston n'elu bụ akụkụ nke ụlọ combustion, n'ihi ya, a na-ejikarị ụdị dị iche iche eme ya, na piston engine petrol na-ejikarị elu dị larịị ma ọ bụ n'elu concave, nke mere na ụlọ combustion dị kọmpat, ebe ikpo ọkụ dị ntakịrị. , na usoro mmepụta ihe dị mfe. A na-ejikarị piston isi convex eme ihe na igwe mmanụ ụgbọala strok abụọ. A na-ejikarị olulu dị iche iche eme elu piston n'elu engines diesel.
Isi piston bụ akụkụ dị n'elu oche piston, a na-etinyekwa isi piston na mgbanaka piston iji gbochie okpomọkụ dị elu na nnukwu nrụgide gas ịbanye na crankcase ma gbochie mmanụ ịbanye n'ime ụlọ ọkụ; A na-ebufekwa ọtụtụ okpomọkụ nke elu piston ahụ na cylinder site na isi piston, wee bufee ya site na igwe jụrụ oyi.
A na-edozi isi piston na ọtụtụ mgbanaka mgbanaka maka ịgbanye mgbanaka piston, ọnụ ọgụgụ nke piston na-adabere na ihe ndị a chọrọ nke akara, nke metụtara ọsọ engine na nrụgide cylinder. Igwe ọkụ dị elu nwere mgbanaka ole na ole karịa injin ndị na-agba ọsọ dị ala, injin mmanụ ụgbọ ala nwekwara obere mgbanaka karịa injin mmanụ dizel. Igwe mmanụ ụgbọ ala na-eji mgbanaka gas 2 na mgbanaka mmanụ 1; Igwe mmanụ dizel nwere mgbanaka gas 3 na mgbanaka mmanụ 1; Igwe dizel dị obere na-eji mgbanaka gas 3 ~ 4. Iji belata nkwụsị esemokwu, ịdị elu nke akụkụ eriri kwesịrị ibelata dị ka o kwere mee, na ọnụ ọgụgụ nke mgbanaka kwesịrị ibelata n'okpuru ọnọdụ nke ijide n'aka.
A na-akpọ akụkụ niile nke mgbanaka piston dị n'okpuru ebe a na-akpọ piston skirts. Ọrụ ya bụ iduzi piston dị na cylinder maka mmegharị mmegharị na iguzogide nrụgide akụkụ. Mgbe engine na-arụ ọrụ, n'ihi mmetụta nke nrụgide gas na cylinder, piston ga-ehulata ma deform. Mgbe piston na-ekpo ọkụ, ego mgbasawanye dị ukwuu karịa nke ebe ndị ọzọ n'ihi ígwè dị na pin piston. Tụkwasị na nke ahụ, piston ga-emepụta nrụrụ extrusion n'okpuru omume nke nrụgide n'akụkụ. N'ihi nrụrụ ahụ dị n'elu, akụkụ nke uwe mwụda piston na-aghọ ellipse na ntụziaka nke ogologo axis perpendicular na pin piston. Tụkwasị na nke ahụ, n'ihi nkesa na-adịghị mma nke okpomọkụ na oke n'akụkụ axis nke piston, mgbasawanye ọkụ nke akụkụ ọ bụla dị n'elu na obere na ala.
Isi ọdịda nke mgbakọ piston na ihe kpatara ya bụ ndị a:
1. Ablation nke elu elu nke piston. Mwepu piston na-apụta n'elu piston ahụ, na-enwe oghere na-adịghị mma n'okwu dị mfe yana agbaze mpaghara n'ọnọdụ dị arọ. Isi ihe kpatara nkwụsị nke elu nke piston na-akpata site na ọkụ ọkụ na-adịghị mma, nke mere na elu na-anabata oke okpomọkụ ma ọ bụ na-agba ọsọ n'okpuru nnukwu ibu mgbe mgbanaka piston na-arapara ma gbajie.
2, elu elu nke piston mgbawa. Ntuziaka nke mgbawa n'elu elu nke piston bụ n'ozuzu perpendicular na axis nke pin oghere nke piston, nke a na-ebutekarị site na ike ọgwụgwụ mgbawa nke thermal nchekasị kpatara. Ihe kpatara ya: oke ibu nke injin na-eduga na nrụrụ dị ukwuu nke piston, na-ebute ike ọgwụgwụ nke elu elu nke piston;
3, piston mgbanaka groove akụkụ mgbidi yi. Mgbe piston na-agbago elu na ala, mgbanaka piston kwesịrị ịbụ radial telescopic na nrụrụ nke cylinder, karịsịa okpomọkụ nke mgbanaka mgbanaka mbụ dị elu, ọ na-emetụtakwa "mmetụta" nke gas na mmanụ mmanụ, ya mere. mgbanaka mgbanaka na ịma jijiji na-eme na mgbanaka mgbanaka, na-akpata iyi;
4. Mgbanaka piston bụ coke rapaara na mgbanaka mgbanaka. Piston mgbanaka coking bụ nsonaazụ mmanụ oxidation mmanụ ma ọ bụ mfu nke nnwere onwe imegharị na tank, ọdịda a na-emerụ ahụ. Isi ihe kpatara ya: mmanụ dizel ekpo oke ọkụ ma ọ bụ ọrụ ibu ibu ogologo oge, nke mere na chịngọm mmanụ na-agba mmanụ, mgbanaka piston, nnukwu nrụrụ ọkụ nke cylinder; Mmanya mmetọ mmanụ dị njọ, mma mmanye mmanụ adịghị mma; Ngwa ikuku crankcase na-arụ ọrụ na-adịghị mma, na-ebute oke nrụgide na-adịghị mma ma ọ bụ adịghị ike ikuku nke cylinder, na-ebute mmanụ na-agba ọsọ. Ya mere, ọ dị mkpa iji hụ na iji mmanụ ruru eru iji gbochie engine diesel ka ọ ghara ikpo ọkụ.
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