Details
| Original language | English |
|---|---|
| Title of host publication | BHR Group - 21st International Conference on Fluid Sealing |
| Pages | 207-226 |
| Number of pages | 20 |
| Publication status | Published - 2011 |
| Event | 21st International Conference on Fluid Sealing - Milton Keynes, United Kingdom (UK) Duration: 30 Nov 2011 → 1 Dec 2011 |
Publication series
| Name | BHR Group - 21st International Conference on Fluid Sealing |
|---|
Abstract
In continuation of earlier investigations into lubricant film formation and the frictional characteristics of radial lip seals, further measurements of the seal under-lip temperature are performed. Utilizing the measured film thickness profiles and the actual lubricant viscosity the viscous lubricant friction component is computed. Comparison with the total measured friction torque clearly indicates that there is an additional boundary friction component which is nearly independent of rotational speed. Based upon these experimental results a multi-scale mixed lubrication approach is proposed allowing for the estimation of radial lip seal friction. Viscous heating is modelled assuming a constant lubricant film thickness being of the order of the combined contact roughness, while speed-independent boundary friction is accounted for by an empirically determined boundary friction coefficient. Micro-scale frictional heat generation is coupled to the actual macro-scale sealing system assembly utilizing an empirically determined relationship between seal under-lip temperature and specific friction loss, thus allowing the calculation of the actual lubricant viscosity. Starting from a first temperature estimate, frictional heat and seal under-lip temperature are computed iteratively until a converged solution is obtained yielding the under-lip temperature and friction torque as a function of the operating conditions and seal-specific parameters. The applicability of the approach is demonstrated for different seal materials, lubricant viscosities and realistic sliding speeds. It is furthermore illustrated how the relationship between seal under-lip temperature and specific friction loss could be derived from thermal finite element analysis or conjugate heat transfer analysis of the sealing system.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Earth and Planetary Sciences (miscellaneous)
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BHR Group - 21st International Conference on Fluid Sealing. 2011. p. 207-226 (BHR Group - 21st International Conference on Fluid Sealing).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Modelling radial lip seal friction - A multi-scale mixed lubrication approach
AU - Wennehorst, B.
AU - Engelke, T.
AU - Poll, G. W.G.
PY - 2011
Y1 - 2011
N2 - In continuation of earlier investigations into lubricant film formation and the frictional characteristics of radial lip seals, further measurements of the seal under-lip temperature are performed. Utilizing the measured film thickness profiles and the actual lubricant viscosity the viscous lubricant friction component is computed. Comparison with the total measured friction torque clearly indicates that there is an additional boundary friction component which is nearly independent of rotational speed. Based upon these experimental results a multi-scale mixed lubrication approach is proposed allowing for the estimation of radial lip seal friction. Viscous heating is modelled assuming a constant lubricant film thickness being of the order of the combined contact roughness, while speed-independent boundary friction is accounted for by an empirically determined boundary friction coefficient. Micro-scale frictional heat generation is coupled to the actual macro-scale sealing system assembly utilizing an empirically determined relationship between seal under-lip temperature and specific friction loss, thus allowing the calculation of the actual lubricant viscosity. Starting from a first temperature estimate, frictional heat and seal under-lip temperature are computed iteratively until a converged solution is obtained yielding the under-lip temperature and friction torque as a function of the operating conditions and seal-specific parameters. The applicability of the approach is demonstrated for different seal materials, lubricant viscosities and realistic sliding speeds. It is furthermore illustrated how the relationship between seal under-lip temperature and specific friction loss could be derived from thermal finite element analysis or conjugate heat transfer analysis of the sealing system.
AB - In continuation of earlier investigations into lubricant film formation and the frictional characteristics of radial lip seals, further measurements of the seal under-lip temperature are performed. Utilizing the measured film thickness profiles and the actual lubricant viscosity the viscous lubricant friction component is computed. Comparison with the total measured friction torque clearly indicates that there is an additional boundary friction component which is nearly independent of rotational speed. Based upon these experimental results a multi-scale mixed lubrication approach is proposed allowing for the estimation of radial lip seal friction. Viscous heating is modelled assuming a constant lubricant film thickness being of the order of the combined contact roughness, while speed-independent boundary friction is accounted for by an empirically determined boundary friction coefficient. Micro-scale frictional heat generation is coupled to the actual macro-scale sealing system assembly utilizing an empirically determined relationship between seal under-lip temperature and specific friction loss, thus allowing the calculation of the actual lubricant viscosity. Starting from a first temperature estimate, frictional heat and seal under-lip temperature are computed iteratively until a converged solution is obtained yielding the under-lip temperature and friction torque as a function of the operating conditions and seal-specific parameters. The applicability of the approach is demonstrated for different seal materials, lubricant viscosities and realistic sliding speeds. It is furthermore illustrated how the relationship between seal under-lip temperature and specific friction loss could be derived from thermal finite element analysis or conjugate heat transfer analysis of the sealing system.
UR - http://www.scopus.com/inward/record.url?scp=84866234060&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84866234060
SN - 9781855981270
T3 - BHR Group - 21st International Conference on Fluid Sealing
SP - 207
EP - 226
BT - BHR Group - 21st International Conference on Fluid Sealing
T2 - 21st International Conference on Fluid Sealing
Y2 - 30 November 2011 through 1 December 2011
ER -