The distributed parameter model of hydraulic axial piston motor and its application in hydraulic excavator swing system

Abstract

Hydraulic axial piston motor is one of the fundamental components in hydraulic systems; it is widely used in engineered machine, especially in high-power drive or reciprocating motion, such as hydraulic excavator. For hydraulic axial piston motor efficient planning, in addition designing and controlling are required for system operating safety and efficiency. Simulation delivers an advantage over analytical approaches and allows better understanding of the motor performance. For multi-piston hydraulic motor, one of the simulation methods, distributed parameter model, could analyze the detailed performance in each piston chamber. Therefore, in this study, we investigate the characteristics of hydraulic axial piston motor by setting up a distributed parameter model based on physical prototype, which includes mechanical–hydraulics coupling process. The effects of the dynamic pressure inside the piston chamber, the fluidic compressibility and other related parameters are considered in the coupling process. At the same time, the distributed parameter model of hydraulic axial piston motor was used in the simulation model of hydraulic excavator. The results indicate that in two-way hydraulic axial piston motor, the valve plane should adopt symmetrical structure, and silencing groove set should be put on both ends of the valve plane slots, which could reduce pressure ripple and overshoot in the piston chamber. Furthermore, the torque characteristics are highly affected by the clearance between the piston and the cylinder bore. Through this research, we may have a better understanding about the mechanism of output torque fluctuation in hydraulic axial piston motor, and the pressure ripple and overshoot in the piston chamber due to through-flow area discontinuity between the silencing groove and the ends of the valve plane slots. The model is verified using a nine-piston hydraulic motor in hydraulic excavator.

Keywords

Hydraulic axial piston motor distributed parameter model mechanical–hydraulics coupling simulation pressure pulsation leakage flow

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References

Fang

. Optimization of cross angle based on the pumping dynamics model. J Zhejiang Univ: Sc A (Appl Phys Eng)2010; 11(3): 181–190.

Yang

Nie

Yin

. Numerical and experimental investigation on torque characteristics of seawater hydraulic axial piston motor for underwater tool system. Ocean Eng2015; 104: 168–184.

Yin

Nie

Zhang

. Research on the sliding bearing pair of water hydraulic axial piston pump. J Mech Eng Sci2013; 227(9): 2049–2063.

Frimpong

Virtual prototype simulation of hydraulic shovel kinematics for spatial characterization in surface mining operations. Int J Surf Min Reclamat Environ2005; 19(4): 238–250.

Hibi

Ichikawa

. Torque performance of hydraulic motor in whole operating condition from start to maximum speed and its mathematical model. In: Proceedings of the fourth international fluid power symposium, 1 January 1975, pp.29–38, B3. Sheffield: British Hydromechanics Research Association.

Meikandan

Raman

Singaperumal

. Theoretical analysis of tapered pistons in high speed hydraulic actuators. Wear1990; 137: 299–321.

Meikandan

Raman

Singaperumal

. Experimental study of friction in hydraulic actuators with sealless pistons. Wear1994; 176: 131–135.

Dasgupta

Mukherjee

Maiti

Theoretical and experimental studies of the steady state performance of an orbital rotor low-speed high-torque hydraulic motor. Proc IMechE, Part A: J Power Energy1996; 210(6): 423–430.

Guo

Wang

ZL.

Analytical study of oil pressure in piston chamber of axial piston pump. Mach Tool Hydraul1996; 139(2): 18–20 (in Chinese).

10.

Sadashivappa

Singaperumal

Narayanasamy

On the efficiency of the axial piston motor considering piston form deviations. Mechatron Mech Electron Control1996; 6(3): 283–301.

11.

Tan

Chen

Jin

. Study on cylinder pressure transient in radial piston hydraulic motors. J Harbin Inst Technol1999; 31(5): 126–129.

12.

Bapiraju

. Modeling of low speed characteristics of a swash-plate-type axial piston hydraulic motor. In: Proceedings of the 48th national conference on fluid power, Chicago, IL, 4–6 Apri 2000, pp.591–598. Chicago: National Fluid Power Association.

13.

Ivantysynova

Grabbel

Ossyra

. Prediction of swash plate moment using the simulation tool CASPAR. In: Proceedings of the ASME 2002 international mechanical engineering congress and exposition (FPST), New Orleans, LA, 17–22 November 2002, pp.1–9. New York: ASME.

14.

Ding

. Exploration of the influence of backing pressure on the efficiency of hydraulic motor. Trans Chin Soc Agric Mach2006; 37(10): 127–131.

15.

Seeniraj

Ivantysynova

. Impact of valve plate design on noise, volumetric efficiency and control effort in an axial piston pump. In: Proceedings of the ASME 2006 international mechanical engineering congress and exposition (FPST), Chicago, IL, 5–10 November 2006, pp.77–84. New York: ASME.

16.

Chen

Patrick

Chua

GH.

Dynamic vibration analysis of a swash-plate type water hydraulic motor. Mech Mach Theory2006; 41: 487–504.

17.

Isaksson

Nilsson

Larsson

Tribology international. Tribol Int2009; 42: 1418–1423.

18.

Nie

Peng

. On torque of swash-plate-type water hydraulic axial piston motor. In: Proceedings of the ICFP, 8–10 April 2009, pp.98–502 (in Chinese). Hangzhou, China: Beijing World Publishing Corporation.

19.

Khalil

El-Bardini

Implementation of speed controller for rotary hydraulic motor based on LS-SVM. Expert Syst Appl2011; 38: 14249–14256.

20.

Bergada

Kumar

Davies

. A complete analysis of axial piston pump leakage and output flow ripples. Appl Math Model2012; 36: 1731–1751.

21.

Lin

Gaosheng

. Simulation research on the variable displacement hydraulic motor with variable effective piston stroke for hydraulic propulsion system. In: Proceedings of the oceans 2012, Hampton Road, VA, USA, 14–19 October 2012, pp.1–11. New York: IEEE.

22.

Miao

Wang

. Modeling and friction dynamic compensation for ultra-large-diametered hollow hydraulic motor servo system. Trans Chin Soc Agric Mach2013; 44(12): 314–320 (in Chinese).

23.

Sliwinski

The basics of design and experimental tests of the commutation unit of a hydraulic satellite motor. Arch Civ Mech Eng2016; 16: 634–644.

24.

Fang

. Optimization of cross angle based on the pumping dynamics model. J Zhejiang Univ: Sc A2010; 11(3): 181–190.

25.

Huang

Yan

Quan

. Characteristics of delivery pressure in the axial piston pump with combination of variable displacement and variable speed. Proc IMechE, Part I: J Systems and Control Engineering2015; 229(7): 599–613.

26.

Manring

ND.

The discharge flow ripple of an axial-piston swash-plate type hydrostatic pump. J Dyn Syst Meas Contr2000, pp.122, 263–268.

27.

Ivantysyn

Ivantysynova

Hydrostatic pumps and motors. New Delhi, India: Academia Books International, 2001; 120: 130–133.

28.

Nouri

BMY

Al-Bender

Swevers

. Modelling a pneumatic servo positioning system with friction. In: Proceedings of the American control conference, Chicago, IL, 28–30 June 2000, pp.1066–1071. IEEE Conference Publications.

29.

Bergada

Kumar

Davies

DLI

. A complete analysis of axial piston pump leakage and output flow ripples. Appl Math Model2012; 36(4): 1731–1751.

30.

Huang

Dong

Quan

. Development of a dual displacement controlled circuit for hydraulic shovel swing motion. Automat Constr2015; 57: 166–174.

31.

Zhang

Quan

Yang

. Output characteristics of a series three-port axial piston pump. Chin J Mech Eng2012; 25(3): 498–505.

32.

Huang

Zhao

Quan

. Development of an asymmetric axial piston pump for displacement controlled system. Proc IMechE, Part C: J Mechanical Engineering Science2014; 228(8): 1418–1430.