Churning losses and efficiency in gearboxes

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: WFRF:(Björklund Stefan) > Churning losses and...

Details
MARC

Andersson, MartinKTH,Tribologi (author)

Churning losses and efficiency in gearboxes

BookEnglish2014

Publisher, publication year, extent ...

Stockholm :KTH Royal Institute of Technology,2014
22 s.
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:kth-152914
ISBN:9789175952772
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152914URI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:vet swepub-contenttype
Subject category:lic swepub-publicationtype

Notes

QC 20141006
Efficient transmissions systems are key to producing competitive motor vehicles that have a smaller environmental impact. Gears are the main components in vehicle transmissions and although they are already highly efficient, there is still room for improvement. In this study, the focus falls on the lubricant used to create separating films between gears and todissipate heat. When driving, the gears churn this lubricant, giving rise to power losses that are related to the amount and properties of the lubricant. However, any attempt to reduce these losses must not compromise the required lubrication and heat dissipation. Paper A reports on the use of an FZG gear test rig to investigate power losses and heat generation for different gear immersion depths, surface roughness and coatings. The results show that lower gear roughness reduces gear mesh losses and heat generation. A polishing affect was obtained when a non-coated gear ran against a coated gear.The aim of the research reported in paper B was to increase the accuracy of efficiency testing. It investigated how and whether repeated disassembly and re-assembly of the same test equipment, as well as test performance and rig conditions, affect the measured torque loss in an FZG gear test rig. It was shown that the measured torque loss changes between one assembly and another. Repeatability between tests is crucial for accurate conclusions.The aim of the research reported in paper C was to study whether gear efficiency could be increased by a running-in procedure, which would reduce the need for a coolant. A back-to-back gear test rig was used to test two running-in loads. Higher gear mesh efficiency was seen when a higher running-in load was used.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Maskinteknik Tribologi hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Tribology hsv//eng
gears
efficiency
temperature
running-in
assembly
torque loss
surface roughness

Added entries (persons, corporate bodies, meetings, titles ...)

Olofsson, Ulf,1962-KTH,Tribologi(Swepub:kth)u10qpddv (thesis advisor)
Björklund, StefanKTH,Maskinelement(Swepub:kth)u1n6li3l (thesis advisor)
Sellgren, UlfKTH,Maskinelement(Swepub:kth)u1r6tcj4 (thesis advisor)
Alfredsson, Bo,1962-KTH,Hållfasthetslära(Swepub:kth)u14o1b7w (opponent)
KTHTribologi (creator_code:org_t)

Internet link

Find in a library

Churning losses and efficiency in gearboxes (Search the publication in LIBRIS)

To the university's database

Find more in SwePub

By the author/editor: Andersson, Marti ...; Olofsson, Ulf, 1 ...; Björklund, Stefa ...; Sellgren, Ulf; Alfredsson, Bo, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Tribology

By the university: Royal Institute of Technology

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se