VOLVO KLUB HRVATSKA :: Balansiranje turbo punjaca

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Balansiranje turbo punjaca http://www.vkh.hr/forum/viewtopic.php?t=2813	Stranica: 1/1.

Autor/ica:	grimreaper [ sub pro 06, 2008 10:13 am ]
Naslov:	Balansiranje turbo punjaca
U par navrata smo se dotaknuli pitanja brzine vrtnje prilikom balansiranja turbo punjaca. Ne budi ljen krenuo sam malo citat po netu kaj se o tome pise, pa sam naisao na sljedece: "There are basically two types of CHRA balancing, high speed (VSR) and low speed (balancing machine). The VSR (vibration sort rig) is a machine that uses compressed air to spin the assembled CHRA to a relatively high speed, while pressure oiling the bearings and sensing vibration of the unit. Small unbalance corrections are then made on the compressor nose or nut to fine or trim balance the unit. Balancing machine CHRA balancing consists of mounting an assembled turbo CHRA in a conventional two plane dynamic balancing machine. The rotating assembly is then driven at a relatively low speed by belt or air, and unbalance readings are taken on both the compressor and turbine ends of the rotating assembly. Oil is not pressure fed into the turbo, as the shaft is prelubricated before the balancing operation. The low speed and short cycle time preclude the need for pressurized lubrication. Either type of CHRA balancing will generally eliminate stackup unbalance to an acceptable degree. Machine balancing has a slight advantage, in that the rotating components are dual plane balanced, as opposed to single plane balancing with the VSR. The main advantage of the VSR is that the turbo has actually spun at high speed, so the operator may be able to hear unusual noises from the turbo, and in some cases the oil flow can be checked (though this is not very reliable.) Another common misconception about balancing is that balancing at higher speeds results in closer balancing. This is not inherently true. A rigid rotor that is out of balance by 10 milligram inches at 1000 RPM will be out of balance by 10 milligram inches at 100,000 RPM. The force created by a given amount of unbalance increases exponentially as speed increases, but the absolute amount of unbalance does not. It is critical that the balancing equipment being used has sufficient sensitivity to balance the rotor to the necessary tolerance at the desired balancing speed, but balancing at operational speed is rarely advantageous. The logistic and safety considerations of very high speed balancing rarely outweigh any accuracy gained." The preceding article was written by Mark Bowman, President and CEO of Heins Balancing Systems, Inc. Heins is the world’s largest supplier of balancing equipment into the turbocharger aftermarket, and supplies both OEMs and aftermarket facilities worldwide. For more information, visit the Heins website at www.heins-balancing.com.

Autor/ica:	hal9000f [ sub pro 06, 2008 10:29 pm ]
Naslov:	Re: Balansiranje turbo punjaca
Citat: U par navrata smo se dotaknuli pitanja brzine vrtnje prilikom balansiranja turbo punjaca. Ne budi ljen krenuo sam malo citat po netu kaj se o tome pise, pa sam naisao na sljedece: Another common misconception about balancing is that balancing at higher speeds results in closer balancing. This is not inherently true. A rigid rotor that is out of balance by 10 milligram inches at 1000 RPM will be out of balance by 10 milligram inches at 100,000 RPM. The force created by a given amount of unbalance increases exponentially as speed increases, but the absolute amount of unbalance does not. Ey, zanimljivu temu si naceo. Znaci jos jedna demistifikacija Vjerojatno dosta kosta, ali bilo bi zanimljivo saznati cijenu BT-1 balancing mashine koju radi navedena firma... Malo sam trazio, ali nisam nasao. Ali, evo naletih na ovo npr. kako je "skupo" dobiti sljedecu uslugu: Balancing costs 20 bucks, and Turbo City will tell you to wait about as many minutes. Good investment for a $2500 replacement item. http://www.turbocity.com/ http://www.mx6.com/forums/1g-mx6-forced ... tions.html A, i na jednom forumu gdje se bave malim modelima trkacih auta, ima rasprava o (re)balansiranju elektromotora koji se pretpostavljam opako vrte, pa tip kaze da je to jako jednostavno. Stavi se stvar na mashinu, izmjeri otklon, skine i stavi malo epoxy smole ili se izbrusi, i tako dok se ne ispegla... Ima tu http://www.niftech.com/catalog.php?mode=all primjer hobby balancera (Ultra Precision R/C Motor Armature and Wheel Balancer) koji kosta 250 USD, ali tip je rekao da taj nista ne valja

Autor/ica:	grimreaper [ ned pro 07, 2008 7:20 pm ]
Naslov:	Re: Balansiranje turbo punjaca
Buduci da niti jedan od servisa turbo punjaca ne zeli napravit samo balansiranje, krenuo sam malo ceprkat po alternativama. Jedina opcija mi dolaze ti koji balansiraju elektromotore, ali to ide na par tisuca okretaja... Ako je vjerovat ovome, onda bi i to trebalo biti dovoljno dobro.

Autor/ica:	v850 [ ned pro 07, 2008 7:32 pm ]
Naslov:	Re: Balansiranje turbo punjaca
mislim da epoxy smola nebi isla bas kao materijal za balansiranje turbine? A i di je elektromotor od turbine.. Mozda da odes kod vulkanizera pa da ti izbalansira turbinu....Shala-mala

Autor/ica:	hal9000f [ ned pro 07, 2008 8:24 pm ]
Naslov:	Re: Balansiranje turbo punjaca
Citat: mislim da epoxy smola nebi isla bas kao materijal za balansiranje turbine? A i di je elektromotor od turbine.. Mozda da odes kod vulkanizera pa da ti izbalansira turbinu....Shala-mala A, nije da znam A, pazi kak se neki vrte ... 15 November 2008 Researchers at ETH Zürich’s Department of Power Electronics have developed an electrical drive system in cooperation with its industrial partners that can achieve more than 1,000,000 rpm. Up to now, industrially-deployed motors have normally reached 250,000 revolutions per minute. ... http://www.greencarcongress.com/2008/11 ... s-del.html

Autor/ica:	v850 [ ned pro 07, 2008 8:32 pm ]
Naslov:	Re: Balansiranje turbo punjaca
Svašta!!!! Mislim... Svaka cast!!!! Jel su to za RC modele, motori? Sorry GRIM na OT...

Autor/ica:	hal9000f [ ned pro 07, 2008 11:04 pm ]
Naslov:	Re: Balansiranje turbo punjaca
Citat: Svašta!!!! Mislim... Svaka cast!!!! Jel su to za RC modele, motori? Sorry GRIM na OT... Ma, ovi nisu. Ovo je za industriju, a valjda i za aute ce imat koristi od istrazivanja.

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