English to Danish translator specializing in Electronics, Acoustics

Working languages:

English to Danish

Jørgen Ellekjær
Acoustics, X-ray, Electronics, Manuals.

Denmark

Local time: 10:45 CEST (GMT+2)

Native in: Danish

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Specializes in:
Electronics / Elect Eng

English to Danish - Standard rate: 0.13 USD per word

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PRO-level points: 167, Questions answered: 65, Questions asked: 1

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Sample translations submitted: 1

English to Danish: False Positive Bearing Fault Diagnosis is Followed by True Diagnosis General field: Tech/Engineering Detailed field: Engineering: Industrial
Source text - English By David Gluzman Round Rock, Texas Diagnosing a bearing fault can be tricky, especially when data are acquired on a machine subjected to external vibrations. Any indication of a potential bearing fault on critical machines is a matter of concern and should be investigated. Even more alarming are sudden incidents of trouble on otherwise smooth running machines. A potential problem was first detected in PeakVue© data. A spectrum in early March 2008 showed a set of harmonics (BSF) fault in a NU321 cylindrical roller bearing. Impact at BSF of surprisingly high magnitude could be seen in the time waveform. This pattern was watched closely over several surveys and consistently showed the presence of the frequency of interest. The low magnitude BSF harmonics were also observed in the normal vibration data. Note the significantly higher magnitude in the PeakVue© time waveform over that in normal data. The sudden onset of the problem was a serious concern. A cracked roller was considered a possible cause, but the lack of typical side bands in the BSF harmonics made the cage-frequency-diagnosis questionable. In addition, low-order harmonics dominated the normal spectrum; a crack typically produces a short impact that result in high order harmonics. These considerations were later dismissed on the basis of possible weak modulation and the presence of impacts clearly visible in PeakVue©. Therefore, a cracked roller remained a plausible consideration. The pattern seemed unchanged for eight months. The keyword is seemed, because a cascade plot provided a false impression of consistency after the onset. A detailed analysis of the frequency of interest conducted a few months following the onset actually showed slight fluctuations over this period while the shaft speed was constant. It was later discovered that what was initially perceived as a BSF fault wa in fact the operating frequency of an air-activated impact vibrator installed shortly before the March survey ten feet away from the bearing. The vibrator's powerful impact was bleeding to the measurement point at the bearing. However, the apparent existence of a rolling element fault could not initially be dismissed.	Translation - Danish Falsk positiv lejefejlsdiagnose efterfølges af en korrekt diagnose Af David Gluzman Round Rock, Texas Det kan være vanskelig at diagnosticeres en lejefejl, især når data er optaget på en maskine påvirket af eksterne vibrationer. Enhver indikation af potentielle lejefejl på kritiske maskiner kræver opmærksomhed og bør undersøges. Mere alarmerende er pludseligt opståede problemer med maskiner, som ellers kører upåklageligt. Et muligt problem blev i første omgang fundet i PeakVue© data. Et spektrum fra først i marts 2008 viste med et sæt harmoniske (BSF) fejl i et NU321 cylindrisk rulleleje. Tidsfunktionen viste stød af overraskende stor amplitude ved BSF. Mønstret blev observeret nøje under flere undersøgelser og viste at den interessante frekvens konstant var til stede. BSF harmoniske af lavere amplitude kunne også ses i de almindelige vibrationsdata. Bemærk at amplituden i PeakVue© tidsfunktionen er væsentlig højere end i den almindelig tidsfunktion. Det pludseligt opståede problem gav anledning til bekymring. En revnet rulle blev anset for at være en mulig årsag, men de typiske sidebånd til de BSF harmoniske var fraværende og dermed blev diagnosen med frekvensen for rulleholderen usikker. Yderligere dominerede harmoniske af lavere orden det normale spektrum. En revne forårsager en kort stød som giver anledning til harmoniske af højere orden. Disse overvejelser blev senere afvist, da der var mulighed for en svag modulation og tilstedeværelsen af tydelige stød i PeakVue© Derfor blev en revnet rulle stadig anset for at være en plausibel forklaring. Mønstret ændrede sig tilsyneladende ikke over en periode på 8 måneder. Nøgleordet er tilsyneladende. Efter problemets opståen gav et kaskadeplot et falskt indtryk af stabilitet . En detaljeret analyse foretaget nogle få måneder efter problemet opstod viste små fluktuationer hen over perioden selv om akslens omdrejningshastighed var konstant. Senere blev det opdaget, at det som til en begyndelse blev opfattet som en BSF-fejl, i virkeligheden var driftsfrekvensen på en luftdrevet vibrator. Vibratoren var blevet installeret 3m fra lejet kort tid før målingen i marts afslørede et problem De kraftige stød fra vibratoren blev transmitteret til målepunktet på lejet. Imidlertid kunne en mulig fejl på en rulle ikke afvises i første omgang

Years of experience: 14. Registered at ProZ.com: Oct 2010.

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Ringsted_Odense

Microsoft Excel, Microsoft Word, GIMP 2.6, Passolo, Powerpoint, Trados Studio

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This user has earned KudoZ points by helping other translators with PRO-level terms. Click point total(s) to see term translations provided.

Total pts earned: 171 PRO-level pts: 167
Top languages (PRO)
English to Danish	164
Danish to English	3
Top general fields (PRO)
Tech/Engineering	132
Medical	12
Other	12
Bus/Financial	4
Marketing	4
Pts in 1 more fld >
Top specific fields (PRO)
Electronics / Elect Eng	36
Automotive / Cars & Trucks	32
Mechanics / Mech Engineering	24
Engineering (general)	16
Medical: Instruments	8
Business/Commerce (general)	8
IT (Information Technology)	6
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Keywords: Acoustics, Electronics, X-ray, Manuals, Woodworking

Profile last updated
Mar 2, 2017

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