“A model for torque losses in variable displacement axial piston motors”

Authors: Geir-Arne Moslått, Michael R. Hansen and Nicolai Sand Karlsen,
Affiliation: National Oilwell Varco, University of Agder and Bosch Rexroth
Reference: 2018, Vol 39, No 2, pp. 107-114.

Keywords: Hydraulics, torque loss, axial piston motor, winch drive, offshore knuckle boom cranes, Bosch Rexroth

Abstract: This paper includes a comparison of earlier presented models for torque losses in hydraulic motors and several proposed models that all rely on data typically available for a system engineer. The new models and the old ones are compared. The new models are all based on a model developed by Jeong 2007 with an expansion that include variable displacement. All of the new models yield very good accuracy down to approximately 50% of maximum displacement and down to approximately 15% of maximum speed. In these operational ranges the deviation in torque is less than 1%. The main purpose of the new models is to facilitate simulations of hydraulically actuated winches with a balance between accuracy and model complexity. This purpose is considered fulfilled with several of the proposed models.

PDF PDF (1767 Kb)        DOI: 10.4173/mic.2018.2.5

References:
[1] Bosch Rexroth AG. (2010). Bosch Rexroth AG, Sales Information, Axial Piston Units. 2010. .
[2] Dorey, R. (1988). Dorey, R, Modelling of losses in pumps and motors. First Bath International Fluid Workshop. www.scopus.com. .
[3] Huhtala, K. and Villenius, M. (1997). Huhtala, K, and Villenius, M. Comparison of Steady-State Models of Hydraulic Pump. 1997. .
[4] Jeong, H.-S. (2007). Jeong, H, -S. A novel performance model given by the physical dimensions of hydraulic axial piston motors: model derivation. Journal of Mechanical Science and Technology. 21(1):83--97. doi:10.1007/BF03161714
[5] Jeong, H.S. and Kim, H.E. (2007). Jeong, H, S. and Kim, H.E. A novel performance model given by the physical dimensions of hydraulic axial piston motors: Experimental analysis. Journal of Mechanical Science and Technology. 21(4):630--641. doi:10.1007/BF03026968
[6] Ortwig, H. (2002). Ortwig, H, New Method of Numerical Calculation of Losses and Efficiencies in Hydrostatic. SAE International Off-Highway Congress. (724). .
[7] Pacey, D.A., Turnquist, R.O., and Clark, S.J. (1979). Pacey, D, A., Turnquist, R.O., and Clark, S.J. The development of a coefficient model for hydrostatic transmissions. In In: Proc.35th Nat.conf.on Fluid Power, volume33. 35th National Conference in Fluid Power, Chicago, pages 173--178. www.scopus.com. .
[8] Schlosser, W. (1961). Schlosser, W, Mathematical model for displacement pump and motors part 2. In Hydraulic power transmission, pages 324--328. London. .
[9] Thoma, J. (1969). Thoma, J, Mathematical models and effective performance of hydrostatic machines and transmission. Hydraulic and Pneumatic Power. pages 642--651. www.scopus.com. .
[10] Wilson, W. (1948). Wilson, W, Performance criteria for positive displacement pumps and fluid motors. In ASME Semi-annual Meeting, paper No. 48-SA-14. 1948. .


BibTeX:
@article{MIC-2018-2-5,
  title={{A model for torque losses in variable displacement axial piston motors}},
  author={Moslått, Geir-Arne and Hansen, Michael R. and Karlsen, Nicolai Sand},
  journal={Modeling, Identification and Control},
  volume={39},
  number={2},
  pages={107--114},
  year={2018},
  doi={10.4173/mic.2018.2.5},
  publisher={Norwegian Society of Automatic Control}
};