Air entrainment can become a significant problem in a web handling process line. The development of an air film between a roller and web can cause a reduction in traction. This can cause a velocity difference between the web and roller and may also cause guiding problems. Roller grooving is a common method to reduce the effects of the air entrainment to improve traction. A traction simulation model for circumferentially grooved rollers has been devised. The model is based on classical plate and shell theory, the Reynolds’ equation, and asperity contact theory. The governing equations are solved in an iterative scheme using a finite difference method with a variable mesh. Theoretical results are experimentally verified. [S0742-4787(00)02203-7]

Issue Section:
Technical Papers
Keywords:
traction, flexible structures, numerical analysis, finite difference methods
Topics:
Algorithms, Pressure, Rollers, Traction, Air entrainment, Deflection
1.
Knox
,
K. L.
, and
Sweeney
,
T. L.
,
1971
, “
Fluid Effects Associated with Web Handling
,”
Ind. Eng. Chem. Process Des. Dev.
,
10
, pp.
201
–
206
.
2.
Ducotey
,
K. S.
, and
Good
,
J. K.
,
1999
, “
Predicting Traction in Web Handling
,”
ASME J. Tribol.
,
121
, pp.
1
–
7
.
3.
Muftu, S. and Benson, R. C., 1995, “Modeling the Transport of Paper Webs Including the Paper Permeability Effects,” ASME ISPS-1, pp. 247–258.
4.
Barlow, E. J., 1967, “Derivation of Governing Equations For Self-Acting Foil Bearings,” ASME J. Lubr. Technol., July, pp. 334–340.
5.
Ducotey
,
K. S.
, and
Good
,
J. K.
,
1998
, “
The Effect of Web Permeability and Side Leakage on the Air Film Height Between a Roller and Web
,”
ASME J. Tribol.
,
120
, pp.
559
–
565
.
6.
Harris, T. A., 1991, Rolling Bearing Analysis, Wiley, New York, pp. 515–529.
7.
Bhushan
,
B.
,
1984
, “
Analysis of the Real Area of Contact Between a Polymeric Magnetic Medium and a Rigid Surface
,”
ASME J. Tribol.
,
106
, pp.
26
–
34
.
8.
Gross, W. A., 1980, Fluid Film Lubrication, Wiley, New York, p. 497.
9.
Granzow
,
G. D.
, and
Lebeck
,
A. O.
,
1984
, “
An Improved One-Dimensional Foil Bearing Solution
,”
ASLE Trans.
,
SP-16
, pp.
54
–
58
.
10.
Lacey
,
C. A.
, and
Talke
,
F. E.
,
1990
, “
A Tightly Coupled Numerical Foil Bearing Solution
,”
IEEE Trans. Magn.
,
26
, No.
6
, pp.
3039
–
3043
.
11.
Shigley, J. E., and Mitchell, L. D., 1983, Mechanical Engineering Design, McGraw-Hill, pp. 731–732.
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