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Yang Jian
Yang Huayong
Xu Bing
State Key Laboratory
of Fluid Power
Transmission and Control,
Zhejiang University,
Hangzhou 310027,China |
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STUDY ON RECIPROCATING SEALS
FOR A LARGER DIAMETER AXIAL
PISTON*
Abstract:
Sealing performance of the reciprocating seals on a larger diameter (100 mm in diameter ) axial piston is theoretically investigated. Based on the characteristics of the clearance flow between the seal and the piston, reasonable boundary conditions for Navier-Stokes
equations are determined and the equations are modified, so that
the final equations can describe the real flow state of the
clearance flow. Through combining the final equations with
finite element method, the pressure distributions within the
clearance field during the reciprocating motion of the piston
and the leakage rate with the pressure are studied. The
deflections of the seal which affect sealing performance are
calculated as well. Sealing performance of piston seals using
oil as the working liquid is compared with using water. It is
concluded that the seal using water as the working liquid is under dry friction, which cannot be dealt with the theory of fluid mechanics. The seal structure is only acceptable using oil as the working liquid..
Key words:
Larger diameter axial piston Reciprocating seals Sealing
performance |