Study Of A Non-conventional Sealing System For
Low-friction Pneumatic Cylinders
Author(s)
T. Raparelli, L. Mazza & A. Trivella
Abstract
This paper investigates a new sealing system for sliding applications in
pneumatic cylinders based on non-contact sealing. By \“reverse” assembling the
common lip seal, the back of the seal is exposed to the supply pressure and the
lip is turned towards the pressure discharge side. When exposed to sealing
pressure the lip yields, resulting in reduced effective surface area with
consequent less friction and wear, providing an air leakage path the flow rate of
which depends on the radial stiffness of the seal. The aim of this work is to
develop a methodology for evaluating the performance of a non-conventional
seal system design (air lubricated seal). A spring-energised commercial seal
fitted to a piston has been tested to measure the air flow rate through it. More
specifically, to evaluate the extent of the influence of cylinder bore diameter and
machining tolerance. Preliminary results are presented and discussed.
A major factor was to avoid, or at least reduce, frictional problems by using a
non-conventional common lip seal assembly solution.
Keywords: seals, sealing systems, pneumatics.
Keywords
seals, sealing systems, pneumatics
Related Book
Other papers in this volume
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