Hydrostatic Pressure Distribution of Oil Lubrication Film for Internal Gear Motors and Pumps: Solution of Resistance Network and Compare to CFD
Main Article Content
Abstract
Oil thin film lubrication is very popular and important in the field of fluid power and tribology science. It is widely used in all kinds of rotating machines. Its role is to separate the relative rotating surfaces to reduce the friction, absorb vibration, protect surfaces, and produce load-carrying against external load. Capacity of the oil lubrication film plays an important role for dynamic behavior, the life-cycle performance of the rotating machinery as well as the systems. During operation, if the oil film is failure, it will cause the relative rotating surfaces to fail much sooner before the damage of components of the machine. This paper introduces the resistance network model to calculate the hydrostatic pressure distribution of the oil lubrication film. The effect of geometry and working parameter on the pressure distribution are then analyzed. Among these parameters, the calculation results point out that the radial and axial clearance, as well as the eccentricity of the ring gear, have a significant effect on the hydrostatic pressure distribution. The pressure profile is also simulated by using the CFD software in order to compare and validate the accuracy of the calculation results. With the solution of the resistance network model, it is easy and quick to calculate the hydrostatic pressure distribution comparing to CFD. It saves time for designers at the early design stage.
Keywords
Internal gear pump, hydrostatic lubrication, oil lubrication film, resistance network model
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
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Distribution of the Oil Film in Heavy Hydrostatic
Thrust Bearing, Appl. Mech. Mater., vol. 541–542,
pp. 658–662, 2014.
https://doi.org/10.4028/www.scientific.net/AMM.541
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[2]. T. Shoyama and K. Fujimoto, Analytical Prediction
of Dynamic Properties of O-Ring with Hydrostatic
Pressure Distribution, J. Appl. Mech., vol. 85, no. 12,
p. 121001, 2018.
https://doi.org/10.1115/1.4041162
[3]. A. Walicka and E. Walicki, Pressure distribution in a
curvilinear hydrostatic bearing lubricated by a
micropolar fluid in the presence of a cross magnetic
field, Lubr. Sci., vol. 17, no. 1, pp. 45–52, 2004.
https://doi.org/10.1002/ls.3010170104
[4]. M. V. Makarov, Effect of the hydrostatic pressure on
the vertical distribution of Laminaria saccharina (L.)
lamouroux in the Barents Sea, Oceanology, vol. 51,
no. 3, pp. 457–464, 2011.
https://doi.org/10.1134/S0001437011030155
[5]. H. Aboshighiba, A. Bouzidane, M. Thomas, F.
Ghezali, A. Nemchi, and A. Abed, Pressure
distribution in orifice-compensated turbulent
hydrostatic bearing with fluid inertia effects using
numerical simulations via Navier-Stokes, Tribol. -
Mater. Surfaces Interfaces, vol. 11, no. 1, pp. 19–29,
2017.
https://doi.org/10.1080/17515831.2017.1288396
[6]. Vijay, K.D., Satish, C., and Pandey, K. N., Effect of
the groove dimensions and orientation on the static
and dynamic performance of non-recessed hybrid
journal bearing, Proceedings of the Twenty-Third
International Conference on Systems Engineering,
Switzerland 2015, pp. 555-560,
https://doi.org/10.1007/978-3-319-08422-0_7
[7]. Vijay, K.D., Satish, C., Pandey, K.N., Analysis of
Hybrid (Hydrodynamic/ Hydrostatic) Journal Bearing, Advanced Materials Research, Vol. 650, pp.
385-390, Jan. 2013,
https://doi.org/10.4028/www.scientific.net/AMR.650.
385
[8]. Xiu, S.C., Xiu, P.B., and Gao, S.Q., Simulation of
Temperature Field of Oil Film in Super-high Speed
Hybrid Journal Bearing Based on FLUENT,
Advanced Materials Research, Vols. 69-70 (2009)
pp 296-300.
https://doi.org/10.4028/www.scientific.net/AMR.69-
70.296
[9]. B. H. Opitz, Pressure pad bearings, pp. 100–115,
1967.
https://doi.org/10.1243/PIME_CONF_1967_182_011
_02
[10]. Trong Hoa Pham, Hybrid method to analysis the
dynamic behavior of the ring gear for the internal
gear motors and pumps, Journal of Mechanical
Science and Technology, Vol. 33, No. 2, pp. 602-612,
2019.
https://doi.org/10.1007/s12206-019-0114-7
[11]. Pham, T.H., Müller, L., Weber, J., Dynamically
loaded the ring gear in the internal gear motor/pump:
Mobility of solution, Journal of Mechanical Science
and Technology, Vol. 32, No. 7, pp. 3023–3035,
2018.
https://doi.org/10.1007/s12206-018-0605-y