Change search
ReferencesLink to record
Permanent link

Direct link
Tribology of hydraulic motor
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
2009 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

A radial piston hydraulic motor has several components involving sliding or rolling interfaces which may encounter tribological problems. Seizure is one of them and it results in complete stoppage of motion between the relatively moving components and has serious consequences in terms of the operation of a hydraulic motor. Extreme running conditions, like low viscosity and high pressure and speed can cause the rupture of lubricating films and this may lead to the seizure of hydraulic motors. The occurrence of seizure often leads to undesirable damage to the motor components and unscheduled maintenance and can prove to be highly expensive. The work reported in this thesis has focused on investigating the mechanisms of seizure and developing suitable tribo test methods for simulating the sliding interfaces of the hydraulic motor. Extensive motor tests have been performed at low viscosity, high pressure and high speed. The results of this work enabled in describing the seizure progression, namely break down of lubricant film, particle entrapment and thermal expansion. Further, tests have been carried out in a rotary tribometer by using a thrust washer conformal test configuration. In this, the influence of area ratio has been studied and this configuration appears to simulate the piston-cylinder contact effectively during boundary lubricated conditions.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2009. , 19 p.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-17674Local ID: 49659880-388e-11de-9b53-000ea68e967bISBN: 978-91-86233-49-5OAI: oai:DiVA.org:ltu-17674DiVA: diva2:990679
Note
Godkänd; 2009; 20090504 (dannil); LICENTIATSEMINARIUM Ämnesområde: Maskinelement/Machine Elements Examinator: Professor Braham Prakash, Luleå tekniska universitet Tid: Fredag den 5 juni 2009 kl 09.15 Plats: F 531, Luleå tekniska universitetAvailable from: 2016-09-29 Created: 2016-09-29Bibliographically approved

Open Access in DiVA

fulltext(3541 kB)10 downloads
File information
File name FULLTEXT01.pdfFile size 3541 kBChecksum SHA-512
14dc6a8fc1d1c72e97245bca03f0e1a6a2b682c53dadf23d3073cff3e775253d690ff55c70c45b5dae1a9da6e36bf30637a99080eb9b43a59ab820d66bd64313
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Nilsson, Daniel
By organisation
Machine Elements

Search outside of DiVA

GoogleGoogle Scholar
Total: 10 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 3 hits
ReferencesLink to record
Permanent link

Direct link