Sab nrauv ntawm lub nplhaib piston feem ntau yog coated los txhim kho cov yam ntxwv ntawm lub nplhaib, xws li los ntawm kev hloov cov kev sib txhuam los yog kev puas tsuaj ntawm qhov chaw. Qee cov coatings, xws li deposition coatings xws li lub cev los yog tshuaj vapor deposition txheej, feem ntau txhim kho cov yam ntxwv ntawm lub nplhaib.

Alu-coat yog ib qho uas tsis muaj tooj liab-raws li txheej ntawm alumina, uas tau tsim nyob rau hauv lub lig 1990s los txo cov uptime ntawm tus tshiab MAN B & W MC xyaw.

MAN Diesel tau qhia txog cov txheej txheem txhuas raws li kev ua haujlwm zoo-hauv cov yam ntxwv ntawm nws txoj kev khiav-hauv thiab ib nrab hnav hauv ob sab phlu. Kev paub dav dav thiab 100% kev vam meej ua rau alu-coat sawv tawm. 1 khiav-hauv txheej xaiv. Alu-coat txo lub sijhawm sim thiab tsim kom muaj kev nyab xeeb thiab txhim khu kev qha rau lub sijhawm tawg. Niaj hnub no, aluminium-coated rings yog siv rau hauv cov cav tshiab thiab hauv cov cav qub nrog honing thiab semi-honing bushings. Aluminium txheej kuj txo lub tog raj kheej roj noj thaum tawg-hauv.

Alu-coat yog semi-mos thermal spray txheej nrog lub thickness ntawm kwv yees li 0.25 hli. Nws yog "xim" thiab saib me ntsis ntxhib, tab sis sai sai tsim ib tug du contoured khiav nto.

Cov mos matrix ntawm lub txheej ua rau cov teeb meem tsis yooj yim rau protrude mus rau qhov chaw khiav ntawm lub nplhaib thiab ua rau ntawm qhov khiav ntawm lub liner hauv ib qho me ntsis abrasive. Lub matrix kuj tseem siv tau los ua qhov tsis muaj kev nyab xeeb los tiv thaiv cov teeb meem kev puas tsuaj ua ntej ua tiav.

Cov txiaj ntsig ntawm retrofitting yog ntau yam. Thaum ntsia tau rau hauv cov khoom siv yav dhau los, cov txheej txheem txhuas tsis tsuas yog tshem tawm lub sijhawm ua haujlwm ntawm lub nplhaib piston. Cov txheej no tseem muab cov npoo kev nyab xeeb ntxiv thaum cuam tshuam nrog cov teeb meem kev ua haujlwm. Cov txheej txheem no feem ntau siv sijhawm 500 txog 2,000 teev. Cov nyhuv abrasive me ntsis ntawm aluminium-coated piston rings ua rau lawv zoo tagnrho rau kev hloov cov piston rings nyob rau hauv kev twb kev txuas nrog overhaul ntawm lub piston. Linings nrog hnav rings feem ntau qhia pom cov xim blemishes thiab / los yog tshuab tawm uas yog ib feem perforated thiab polished. Alu-coat ua rau qee qhov hnav-tawm hauv ob sab phlu rau ntawm qhov ntsuas microscopic, uas feem ntau yog txaus los tsim kho qhov tseem ceeb ntawm lub hauv ob sab phlu, uas yog ib qho tseem ceeb rau tribology ntawm lub hauv ob sab phlu / roj / piston nplhaib system.