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Research Papers: Other (Seals, Manufacturing)

Numerical Investigations on the Sealing Performance of a Reciprocating Seal Based on the Inverse Lubrication Method

[+] Author and Article Information
Jun Wang

College of Mechanical and Vehicle Engineering,
Taiyuan University of Technology,
No. 79 West Street Yingze,
Taiyuan 030024, China
e-mail: th.perfects@gmail.com

Yongkang Li

College of Mechanical and Vehicle Engineering,
Taiyuan University of Technology,
No. 79 West Street Yingze,
Taiyuan 030024, China
e-mail: buaalyk@qq.com

Zisheng Lian

College of Mechanical and Vehicle Engineering,
Taiyuan University of Technology,
No. 79 West Street Yingze,
Taiyuan 030024, China
e-mail: THWL208@163.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received January 30, 2019; final manuscript received July 13, 2019; published online August 1, 2019. Assoc. Editor: Noel Brunetiere.

J. Tribol 141(11), (Aug 01, 2019) (9 pages) Paper No: TRIB-19-1050; doi: 10.1115/1.4044297 History: Received January 30, 2019; Accepted July 14, 2019

The work presented in this paper describes a new approach to calculate the film profile, friction, and fluid transport of a reciprocating U-cup seal used in a hydraulic piston pump. An innovative partial lubrication model of the seal is developed, which connects the inverse hydrodynamic lubrication method and Greenwood–Williamson asperity contact model. Finite element models (FEM) were established to simulate deformation behavior under-mounted and pressurized process using finite element code ansys. Based on the finite element simulations, corresponding numerical calculations have been made using the matlab with the inverse hydrodynamic lubrication and asperity contact theories. The accuracy of these models was validated against existing experimental data to ensure that they can predict the sealing performance sufficiently. The effects of the operating parameters as well as the magnitude of interference on the sealing performance in terms of friction, fluid transport, and film thickness were discussed. The results of the simulation indicate that the interference fit, sealed pressure, and rod velocity play significant roles to improve the wear and seizure resistance capability that is critical to the service life of the seal.

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References

McKee, M., and Gordaninejad, F., 2017, “Reciprocating Shaft Seals for High-Temperature and High-Pressure Applications: A Review,” ASME J. Tribol., 140(3), p. 032202. [CrossRef]
White, C. M., and Denny, D. F., 1948, The Sealing Mechanism of Flexible Packings, Scientific and Technical Memorandum, No 3/47. H.M. Stationery Off., London.
Rana, A. S., and Sayles, R. S., 2005, “An Experimental Study on the Friction Behaviour of Aircraft Hydraulic Actuator Elastomeric Reciprocating Seals,” Tribol. Interface Eng. Ser., 48, pp. 507–515. [CrossRef]
Nikas, G. K., Almond, R. V., and Burridge, G., 2014, “Experimental Study of Leakage and Friction of Rectangular, Elastomeric Hydraulic Seals for Reciprocating Motion From −54 to + 135 °C and Pressures From 3.4 to 34.5 MPa,” Tribol. Trans., 57(5), pp. 846–865. [CrossRef]
Peng, C., Guo, S., Ouyang, X., Zhou, Q., and Yang, H., 2018, “Mixed Lubrication Modeling of Reciprocating Seals Based on a Developed Multiple-Grid Method,” Tribol. Trans., 61(6), pp. 1–11. [CrossRef]
Nikas, G. K., 2018, “Fast Performance-Analysis of Rectangular-Rounded Hydraulic Reciprocating Seals: Mathematical Model and Experimental Validation at Temperatures Between −54 and + 135 °C,” Tribol. Int., 128, pp. 34–51. [CrossRef]
Field, G. J., and Nau, B. S., 1975, “A Theoretical Study of the Elastohydrodynamic Lubrication of Reciprocating Rubber Seals,” ASLE Trans., 18(1), pp. 48–54. [CrossRef]
Nikas, G. K., 2002, “Elastohydrodynamics and Mechanics of Rectangular Elastomeric Seals for Reciprocating Piston Rods,” ASME J. Tribol., 125(1), pp. 60–69. [CrossRef]
Salant, R. F., Maser, N., and Yang, B., 2006, “Numerical Model of a Reciprocating Hydraulic Rod Seal,” ASME J. Tribol., 129(1), pp. 91–97. [CrossRef]
Thatte, A., and Salant, R. F., 2009, “Elastohydrodynamic Analysis of an Elastomeric Hydraulic Rod Seal During Fully Transient Operation,” ASME J. Tribol., 131(3), p. 031501. [CrossRef]
Li, X., Suo, S., Guo, F., Wu, C., and Jia, X., 2018, “A Study of Reciprocating Seals With a New Mixed-Lubrication Model Based on Inverse Lubrication Theory,” Lubr. Sci., 30(3), pp. 126–136. [CrossRef]
Ongun, Y., 2008, “An Axisymmetric Hydrodynamic Interface Element for Finite-Element Computations of Mixed Lubrication in Rubber Seals,” Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol., 222(3), pp. 471–481. [CrossRef]
Peng, C., Ouyang, X., Zhu, Y., Guo, S., Zhou, Q., and Yang, H., 2018, “Investigation Into the Influence of Stretching on Reciprocating Rod Seals Based on a Novel 3-D Model vs Axisymmetric Model,” Tribol. Int., 117, pp. 1–14. [CrossRef]
Stupkiewicz, S., and Marciniszyn, A., 2009, “Elastohydrodynamic Lubrication and Finite Configuration Changes in Reciprocating Elastomeric Seals,” Tribol. Int., 42(5), pp. 615–627. [CrossRef]
Bhaumik, S., Kumaraswamy, A., Guruprasad, S., and Bhandari, P., 2015, “Investigation of Friction in Rectangular Nitrile-Butadiene Rubber (NBR) Hydraulic Rod Seals for Defence Applications,” J. Mech. Sci. Technol., 29(11), pp. 4793–4799. [CrossRef]
Crudu, M., Fatu, A., Cananau, S., Hajjam, M., Pascu, A., and Cristescu, C., 2012, “A Numerical and Experimental Friction Analysis of Reciprocating Hydraulic ‘U’ rod Seals,” Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol., 226(9), pp. 785–794. [CrossRef]
Fatu, A., and Hajjam, M., 2011, “Numerical Modelling of Hydraulic Seals by Inverse Lubrication Theory,” Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol., 225(12), pp. 1159–1173. [CrossRef]
Kanters, A. F. C., 1990, “On the Calculation of Leakage and Friction of Reciprocating Elastomeric Seals,” Ph.D. thesis, Eindhoven University of Technology, The Netherlands.
Nikas, G. K., and Sayles, R. S., 2006, “Study of Leakage and Friction of Flexible Seals for Steady Motion Via a Numerical Approximation Method,” Tribol. Int., 39(9), pp. 921–936. [CrossRef]
Dragoni, E., and Strozzi, A., 1988, “Analysis of an Unpressurized, Laterally Restrained, Elastomeric O-Ring Seal,” ASME J. Tribol., 110(2), pp. 193–200. [CrossRef]
Johannesson, H. L., 1983, “Oil Leakage and Friction Forces of Reciprocating O-Ring Seals Considering Cavitation,” ASME J. Lubr. Tech., 105(2), pp. 288–296. [CrossRef]
Prati, E., and Strozzi, A., 1984, “A Study of the Elastohydrodynamic Problem in Rectangular Elastomeric Seals,” ASME J. Tribol., 106(4), pp. 505–512. [CrossRef]
Schmidt, T., André, M., and Poll, G., 2010, “A Transient 2D-Finite-Element Approach for the Simulation of Mixed Lubrication Effects of Reciprocating Hydraulic rod Seals,” Tribol. Int., 43(10), pp. 1775–1785. [CrossRef]
Gadari, M. E., and Hajjam, M., 2018, “Effect of the Grooved Rod on the Friction Force of U-Cup Hydraulic Rod Seal With Rough Lip,” Tribol. Trans., 61(4), pp. 661–670. [CrossRef]
Huang, Y., and Salant, R. F., 2015, “Numerical Analysis of a Hydraulic Rod Seal: Flooded vs. Starved Conditions,” Tribol. Int., 92, pp. 577–584. [CrossRef]
Gadari, E. M., Fatu, A., and Hajjam, M., 2015, “Shaft Roughness Effect on Elasto-Hydrodynamic Lubrication of Rotary lip Seals: Experimentation and Numerical Simulation,” Tribol. Int., 88, pp. 218–227. [CrossRef]
Yang, B., and Salant, R. F., 2008, “A Numerical Model of a Reciprocating Rod Seal With a Secondary Lip,” Tribol. Trans., 51(2), pp. 119–127. [CrossRef]
Patir, N., 1978, “Effects of Surface Roughness on Partial Film Lubrication Using an Average Flow Model Based on Numerical Simulation,” Ph.D. thesis, Northwestern University, Evanston, IL.
Greenwood, J. A., and Williamson, J. B. P., 1966, “Contact of Nominally Flat Surfaces,” Proc. R. Soc. London. Ser. A, Math. Phys. Sci., 295(1442), pp. 300–319. [CrossRef]
Streator, J. L., 2002, “A Model of Mixed Lubrication with Capillary Effects,” Tribol. Ser., 40, pp. 121–128. [CrossRef]
Patir, N., 1979, “Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces,” ASME J. Tribol., 101(2), pp. 220–230.
Huang, Y., 2014, “Elastohydrodynamic Model of Hydraulic rod Seals with Various rod Surfaces,” Ph.D. thesis, Georgia Institute of Technology, Atlanta.

Figures

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Fig. 1

Typical U-cup hydraulic rod seal

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Fig. 2

FEA model with meshing

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Fig. 3

Contact pressure with different mesh sizes

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Fig. 4

Friction force variation with different sealed pressures by present simulation, test data [16], and IHL method results [17]

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Fig. 5

Geometry and details of the mounted and pressurized process: (a) the von Mises stress of installation; (b) the von Mises stress of mounted and pressurized, (c) a close-up illustration of sealing interface, and (d) contact pressure of sealing zone

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Fig. 6

Static contact pressure and contact load: (a) effects of sealed pressure and (b) effects of magnitude of interference

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Fig. 7

Sealing length and maximum von Mises stress distribution: (a) different sealed pressure and (b) the different magnitude of interference

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Fig. 8

Variation of friction force with sealed pressure and velocity: (a) outstroke and (b) instroke

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Fig. 9

Variation of fluid transport with sealed pressure and velocity: (a) outstroke, (b) instroke, and (c) fluid leakage

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Fig. 10

Film thickness distribution under different sealed pressures (MPa) and rod velocities (m s−1), δ = 1.2 mm, outstroke

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Fig. 11

Variation of friction force with an interference fit and rod velocity: (a) outstroke and (b) instroke

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Fig. 12

Variation of fluid transport with interference fit and velocity: (a) outstroke, (b) instroke, and (c) fluid leakage

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Fig. 13

Film thickness distribution under different interferences (mm) and rod velocities (m s−1), Ps = 5 MPa, outstroke

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Fig. 14

Friction components at different rod velocities

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