0
Research Papers: Other (Seals, Manufacturing)

Analytical/Experimental Study of the Contribution of Individual Seals to Friction Force in Pneumatic Actuators

[+] Author and Article Information
Luigi Mazza

Department of Mechanical
and Aerospace Engineering-DIMEAS,
Politecnico di Torino,
Corso Duca Degli Abruzzi, 24,
Torino 10129, Italy
e-mail: luigi.mazza@polito.it

Guido Belforte

Department of Mechanical and Aerospace
Engineering-DIMEAS,
Politecnico di Torino,
Corso Duca Degli Abruzzi, 24,
Torino 10129, Italy
e-mail: guido.belforte@polito

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received January 18, 2016; final manuscript received March 24, 2016; published online August 11, 2016. Assoc. Editor: Min Zou.

J. Tribol 139(2), 022202 (Aug 11, 2016) (10 pages) Paper No: TRIB-16-1027; doi: 10.1115/1.4033365 History: Received January 18, 2016; Revised March 24, 2016

This paper presents an analytical model and its experimental validation for assessing friction forces in reciprocating seals for single and double rod pneumatic cylinders. The contributions of individual piston and rod seals are analyzed using a combination of analytical and experimental approaches. The former entails a friction force formulation based on a lumped parameter seal model, whereas the latter involves carrying out measurements on complete actuators. Selecting appropriate test conditions made it possible to analyze separately the contributions that individual seals make to the overall friction measured on complete actuators. Analysis results were validated by means of friction measurements on the actuators seals, which were tested individually in specific devices. The experimental results were interpreted on the basis of the proposed analytical formulation and confirmed its validity.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

(a) Test rig schematics, and details of (b) piston seals friction device and (c) rod seals friction device

Grahic Jump Location
Fig. 2

Lumped parameter model of a lip seal: (a) seal model, (b) free-body diagram of the lip, and (c) orientation of the piston seals

Grahic Jump Location
Fig. 3

Friction force, single rod, and double rod actuators

Grahic Jump Location
Fig. 4

Effect of pressure differential across the piston seals, single rod actuators

Grahic Jump Location
Fig. 5

Friction force versus pressure differential across the piston, single rod actuators, test conditions III and II

Grahic Jump Location
Fig. 6

Friction force versus pressure differential across the piston, single rod actuators, test conditions IV and I

Grahic Jump Location
Fig. 7

Friction force of single piston seal and rod seal

Grahic Jump Location
Fig. 8

Friction forces in pneumatic cylinder and seals (test conditions I–IV)

Grahic Jump Location
Fig. 9

Friction forces in double piston seals (test condition III)

Grahic Jump Location
Fig. 10

Friction forces in double piston seals (test conditions II and III)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In