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Research Papers: Operations, Applications and Components

Experimental and Numerical Study of Performance Behavior of Triangular Seal Under High Hydraulic Pressure

[+] Author and Article Information
Bruno R. Mose

School of Mechanical Engineering,
Yeungnam University,
280, Daehak-Ro,
Gyeongsan 38541, Gyeongbuk, South Korea
e-mail: mbruno@eng.jkuat.ac.ke

Hyun-Seok Lim

School of Mechanical Engineering,
Yeungnam University,
280, Daehak-Ro,
Gyeongsan 38541, Gyeongbuk, South Korea
e-mail: lin9731@hanmail.net

Dong-Kil Shin

School of Mechanical Engineering,
Yeungnam University,
280, Daehak-Ro,
Gyeongsan 38541, Gyeongbuk, South Korea
e-mail: dkshin@yu.ac.kr

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received June 15, 2017; final manuscript received December 26, 2017; published online February 20, 2018. Assoc. Editor: Hardayal S. Mehta.

J. Pressure Vessel Technol 140(2), 021602 (Feb 20, 2018) (8 pages) Paper No: PVT-17-1113; doi: 10.1115/1.4039003 History: Received June 15, 2017; Revised December 26, 2017

In this paper, a seal with triangular cross section was proposed and its performance behavior under compression and various hydraulic pressures was analyzed through experimental and numerical methods. The seal was designed to have a 90 deg corner located near the extrusion gap while hydraulic pressure was applied at an inclination. With this design, it was found that even at hydraulic pressures of up to 18 MPa, the seal offered good fluid tight sealing capabilities without indications of extrusion failures. Such high pressure offers new possibilities for successful application of the seal in aircraft and rocket propulsion equipment. Moreover, the resistance of the seal against leakages was assured because measured contact stresses were greater than applied pressures. A numerical simulation through finite element analysis (FEA) showed that tilting of the delta ring even at angles of ±5deg did not have any effect on the Von Mises stresses. The FEA results also demonstrated that the deformations and fringe patterns of delta ring were similar to the experimental results.

Copyright © 2018 by ASME
Topics: Pressure , Stress , Extruding
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References

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Figures

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Fig. 1

Delta ring: (a) fabricated model, (b) cross section dimensions, and (c) silicone mold

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Fig. 2

(a) Design of experimental rig and (b) an illustration of hydraulic flow path to the seal installed in groove

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Fig. 3

(a) Loading condition, (b) transparent photoelasticity experimental rig, and (c) co-ordinate system of the triangular seal

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Fig. 4

Actual isochromatic fringe patterns for delta seal under 20% compression ratio and various lateral pressures (a) 8 MPa, (b) 10 MPa, (c) 14 MPa, (d) 16 MPa, (e) 18 MPa, and (f) 20 MPa.

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Fig. 5

(a) Actual, (b) regenerated upper side: a = 2.07 mm, and (c) regenerated front side; a = 2.312 mm isochromatics of delta seal (internal pressure: 10 MPa)

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Fig. 6

(a) Actual, (b) regenerated upper side: a = 2.299 mm, and (c) regenerated front side; a = 2.208 mm isochromatics of delta seal (internal pressure: 20 MPa)

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Fig. 7

Stress contours of upper side of the delta ring (internal pressure: 10 MPa, a = 2.07 mm), (a) σx, (b) σy, and (c) τxy

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Fig. 8

Stress contours of upper side of the delta ring (internal pressure: 20 MPa, a = 2.299 mm), (a) σx, (b) σy, and (c) τxy

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Fig. 9

Contact stresses (a) σx and (b) σy on upper side of delta ring with respect to applied pressures

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Fig. 10

Performance behavior data of various seal systems alongside the delta ring, (a) Pi = 0.98 MPa, (b) Pi = 1.96 MPa, and (c) Pi = 3.92 MPa

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Fig. 11

Contact stresses τxy on upper side of various seal profiles with respect to applied pressures

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Fig. 12

(a) Isochromatic fringes and (b) photograph of the fractured delta ring seal at a lateral pressure of 50 MPa

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Fig. 13

Geometric model (a) and meshed finite element model (b) of the delta seal

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Fig. 14

Numerical isochromatic fringes of seal model under different medium pressures

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Fig. 15

Deformation and numerical isochromatic fringes of seal model under different medium pressures

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