2024 Tus sau: Erin Ralphs | [email protected]. Kawg hloov kho: 2024-02-19 16:10
Piston rings yog cov nplhaib nrog qhov sib txawv me me, tsis kaw. Lawv pom nyob rau hauv grooves ntawm cov phab ntsa sab nrauv ntawm pistons nyob rau hauv txhua hom reciprocating engines (xws li lub tshuab nqus tsev vacuum los yog combustion engines).
1. Rau sealing lub combustion chamber. Compression rings ho nce compression. Nplhaib, tawg, lossis hnav lub nplhaib tuaj yeem ua rau lub cav tsis pib lossis poob lub zog.
2. Txhawm rau txhim kho cov cua sov hloov mus los ntawm lub tog raj kheej phab ntsa. Cov nplhaib pab tshem tawm cov cua sov ntawm lub piston thaum lub sij hawm ua haujlwm ntawm lub cav combustion, yog li tiv thaiv overheating.
3. Txhawm rau txo cov roj cav (hauv ob-stroke diesel xyaw thiab hauv tag nrho plaub-stroke ICEs).
Qhov sib koom ua ke (aka xauv) nyob nruab nrab ntawm qhov kawg ntawm lub nplhaib piston. Thaum lub piston nyob rau hauv lub tog raj kheej, lub xauv yog me ntsis compressed - mus txog rau ob peb feem ntawm ib millimeter. Nws tshwm sim oblique (rau plaub-stroke internal combustion engines) thiab ncaj. Cov rings nyob rau hauv grooves yog teem nyob rau hauv xws li ib txoj kev uas lub kaum sab xis ntawm cov pob qij txha yog sib npaug (2 rings - 180 degrees, 3 rings - 120 degrees). Qhov tshwm sim yog ib tug maze uas txo qhov kev tawggases. Nplhaib yog roj scraper thiab compression. Cov roj scrapers tiv thaiv lub combustion chamber los ntawm cov roj nkag los ntawm lub crankcase. Lawv tshem tawm cov roj ntau dhau ntawm lub tog raj kheej. Cov roj scraper rings yog ntsia hauv qab cov nplhaib compression. Lawv muaj slits. Nyob rau hauv ob-stroke roj av ICEs, roj scrapers tsis siv, txij li thaum lub cav roj hlawv nrog cov roj. Tam sim no tog twg los cam khwb cia hlau los yog puas steel rings nrog expanders nyob rau hauv daim ntawv ntawm springs yog tsim. Cov khoom xyaw yooj yim dua thiab pheej yig dua los tsim, yog li lawv muaj ntau dua li cov cam khwb cia.
Compression piston rings tiv thaiv lub cav crankcase los ntawm cov pa roj los ntawm lub combustion chamber. Nyob rau hauv lub xeev dawb ntawm lub nplhaib, lub sab nraud txoj kab uas hla yog loj tshaj lub puab. Vim li no, ib feem ntawm cov khoom raug txiav tawm. Qhov chaw ntawm kev txiav yog hu ua lub xauv. Feem ntau, tsis pub ntau tshaj peb lub rings yog ntsia rau ntawm ib lub piston, vim hais tias cov degree ntawm piston sealing nce me ntsis, thiab kev sib txhuam poob nce. Nyob rau hauv ob-stroke combustion engine, raws li txoj cai, ob lub nplhaib raug ntsia. Qhov hla ntawm feem ntau compression rings yog rectangular. Cov ntug muaj xws li ib tug chamfer uas tapers los yog ib tug cylindrical profile. Thaum lub sijhawm ua haujlwm ICE, cov nplhaib sib tw rau qee qhov (qhov no muab kev tshem tawm hauv qhov zawj), uas ua rau lawv yooj yim rau tawg.
Kev tsim cov piston rings Technologies thiab cov txheej txheem ntawm kev tsim khoom yuav tsum muab cov duab ntawm cov khoom, uas nyob rau hauv lub xeev dawb yuav tsim cov qib siab xav tau hauv nws ua haujlwmmob. Lub nplhaib piston feem ntau yog ua los ntawm lub zog muaj zog grey cam khwb cia hlau, vim nws muaj qhov ruaj khov elasticity thiab lub zog, siab hnav tsis kam, thiab zoo heev los tiv thaiv kev sib txhuam. Doping additives kuj tseem siv (tshwj xeeb ntxeem tau chromium txheej, molybdenum surfacing, plasma jet spraying, ceramic txheej, pob zeb diamond hais), uas ua rau ib tug tseem ceeb nce nyob rau hauv lub thermal stability ntawm cov khoom.
Pom zoo:
Yuav ua li cas muab cov nplhaib ntawm lub piston: cov txheej txheem thev naus laus zis ntawm kev txhim kho thiab hloov cov nplhaib
Yog tias lub tsheb qhov kev ua haujlwm tsis zoo tau poob qis, kev siv roj thiab roj tau nce ntxiv, teeb meem pib tshwm sim, qhov no qhia tias lub cav hnav. Tab sis qhov no tseem tsis tau txiav txim siab. Cov tsos mob no qhia tau hais tias cov nplhaib yuav tsum tau hloov. Cia peb saib yuav ua li cas muab cov nplhaib ntawm lub piston. Cov txheej txheem tsis yooj yim, tab sis yuav tsum muaj cov cuab yeej thiab kev saib xyuas
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