Betriebssichere Gleitlager

Vogelpohl, Georg

doi:10.1007/978-3-642-46101-9

Cited by 65 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is a function of the type of bearing, bearing load, dynamic viscosity of the lubricant, and bearing temperature. According to Vogelpohl (1967), see also , the 1 Stribeck curve for friction coefficient exponent q ¼ 1:5 is used for the high load cases (So > 1) and q ¼ 2 for the low load cases (So < 1). The transition from mixed friction into fluid friction takes place at a speed which is higher, the greater the bearing load is.…”

Section: Power Loss Due To Bearing Frictionsmentioning

confidence: 99%

Pelton Turbines

Zhang¹

2016

View full text Add to dashboard Cite

Section: Power Loss Due To Bearing Frictionsmentioning

confidence: 99%

Pelton Turbines

Zhang¹

2016

View full text Add to dashboard Cite

“…For simplification, the dp dy -terms were neglected, like it would be in a contact with infinite width [41]. Furthermore, no overall cross flow in the computational domain and consequently, no extradiagonal flow factor terms occur because in our simulations the roughness structures are oriented strictly parallel or transverse to the main flow direction.…”

Section: Mathematical Backgroundmentioning

confidence: 99%

A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication

et al. 2018

View full text Add to dashboard Cite

Abstract:The common approach for the flow factor calculation is based on using the Reynolds equation to simulate the micro-level flow. However, for structured surfaces the fluid flow cannot be represented correctly, due to the assumptions made when deriving the Reynolds equation. In this work, a novel method using the Navier-Stokes equations for the calculation of the micro-level flow is presented and validated against results from Patir and Cheng. The three-dimensional lubrication gap was generated by a rough Gaussian random surface and a perfectly smooth moving counter surface, in order to be available for different numerical methods. The presented results illustrate similar trends for both the approaches. Additionally, the use of the Navier-Stokes equations allows for the observance of surface induced effects which cannot be resolved by the approach of Patir and Cheng. Furthermore, a numerical approach for a shear flow factor calculation with a rough moving surface is presented and validated against other simulation methods. While the validation is maintained with pressure-and temperature-independent density and viscosity, these effects will be taken into account for later research activities of textured surfaces.

show abstract

“…Obviously, the value of w, a t which the surfaces of journal and bearing touch for the first time, w, is a measure for the quality of the bearing. From observations of Vogelpohl (2) it follows that the value of w, is approximated by the following equation :…”

Section: Introductionmentioning

confidence: 99%

Boundary Lubrication of Bronzes—Engineering Aspects

Gee¹,

Vaessen²

1973

A S L E Transactions

View full text Add to dashboard Cite

Friclion-speed cl~aracteristics of full journal bearings made from Cu6SnIOPb and Cu6Sn with and without phosphorus zuere clelermined, iisi~zg a straight mitzeral white oil as lzbbricant. It zvas fo~tizd !hat the bearings r u n i n smootlzly if !he bearing-operating temperature remaigzs below T , , i.e., the Irci~tsiliotz lemperature for eJective boundary lubrication. A t bearing-operaling temperalztres above T t , boundary lubrication fails, and wear afzd surface deterioration interfere with the for??zalion of a I~ydrody~zamic lubricant film, a conseqztence b e b g that p/~ospltorzu-free alloys behave betler than pltospltorits-codaining alloys. This effect was also found zuilh a crankcase oil of IJD S A E ZOW type.

show abstract

Betriebssichere Gleitlager

Cited by 65 publications

References 0 publications

Pelton Turbines

Pelton Turbines

A Novel Approach for Modeling Surface Effects in Hydrodynamic Lubrication

Boundary Lubrication of Bronzes—Engineering Aspects

Contact Info

Product

Resources

About