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Implications of cavitation in individual grooves of spiral groove bearings
Ansvarig organisation
2001 (Engelska)Ingår i: Proceedings of the Institution of mechanical engineers. Part J, journal of engineering tribology, ISSN 1350-6501, E-ISSN 2041-305X, Vol. 215, nr J5, s. 417-424Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The pressure distribution in a flat spiral groove thrust bearing obtained from a straightforward solution of the Reynolds equation includes subatmospheric pressure in part of the grooved area, This is masked in the common theory based on the assumption of an infinite number of grooves. Furthermore, the negative contribution to the load capacity from this area is usually small, which may explain why the presence of subatmospheric pressure has not been given much attention in connection with these bearings. Subatmospheric pressure is, however, necessary for liquid-lubricated flat spiral groove thrust bearings of conventional design to work at all at low numbers of grooves, which in turn requires a non-zero cavitation pressure. Cavitation within individual grooves implies non-linearity in, for example, the relation between load capacity and rotational speed of the bearing and limits the obtainable load capacity. This is more pronounced and important to consider at low numbers of grooves (wide grooves) than at high numbers of grooves (narrow grooves), and it is difficult to determine for what number of grooves that reliable prediction of bearing performance can be expected. It depends on the actual value of the cavitation pressure and other parameters that are usually unknown or difficult to account for. To avoid this disadvantage a modified design of liquid-lubricated flat spiral groove thrust bearings is suggested.

Ort, förlag, år, upplaga, sidor
BURY ST EDMUNDS: PROFESSIONAL ENGINEERING PUBLISHING LTD , 2001. Vol. 215, nr J5, s. 417-424
Nyckelord [en]
spiral groove bearings, low groove numbers, cavitation, load limitation, modified design, supply areas
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Identifikatorer
URN: urn:nbn:se:bth-8166ISI: 000172708300002Lokalt ID: oai:bth.se:forskinfo2E9F71D086D711C8C12575B00020F946OAI: oai:DiVA.org:bth-8166DiVA, id: diva2:835855
Tillgänglig från: 2012-09-18 Skapad: 2009-05-08 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Broman, Göran

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