Power Matching and Energy Efficiency Improvement of Hydraulic Excavator Driven with Speed and Displacement Variable Power Source

Chinese Journal of Mechanical Engineering - Tập 32 - Trang 1-12 - 2019
Lei Ge1, Long Quan1, Xiaogang Zhang1, Zhixin Dong1, Jing Yang1
1Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Taiyuan, China

Tóm tắt

Mobile machinery energy efficiency and emission pollution are the national and worldwide issues. This paper contributes in solving these problems by applying a speed variable power source. Unfortunately, almost all of the speed variable systems have the dynamic response problem when the motor starts with full load or heavy load. To address this problem, a hydraulic accumulator is used to balance the load of the power source for assisting starting of the motor and a matching method combined with speed and displacement control of the pump is proposed to improve the energy efficiency and dynamic performance simultaneously under different working conditions. Also, the power source/valve combined control strategy of an independent metering system is designed to realize flow matching of the whole system. Firstly, a test system is established to study the dynamic performance and energy efficiency of the speed variable power source with an auxiliary accumulator. Working performance and energy consumption of the power source under different rotating speeds and different loads are studied. And then, the hydraulic excavator test rig with the proposed system is constructed. Furthermore, the working performance of the excavator with the speed-fixed and speed-variable strategy are studied comparatively. Results show that, compared with fixed-speed strategy, the electric power consumption during the idle period and partial load condition can be reduced about 2.05 kW and 1.37 kW. The energy efficiency of speed variable power source is about 40%‒71%, which is higher than that of the fixed-speed power source by 3%–10%.

Tài liệu tham khảo

M Ochiai, S Ryu. Hybrid in construction machinery. Proceedings of the 7th JFPS International Symposium on Fluid Power, Toyama, Japan, September 15–18, 2008: 41–44.

J Lodewyks, P Zurbrügg. Decentralized energy-saving hydraulic concepts for mobile working machines. 10th International Fluid Power Conference, Dresden, Germany, March 8–10, 2016: 79–90.

B S Yoo, J Cho, C M Hwang, et al. Development of a simulation program for conceptual design of hybrid excavators. SICE Annual Conference, Tokyo, Japan, September 13–18, 2011: 318–322.

Y Gao, P E Feng, B Peng, et al. Stage-based power matching control of hydraulic excavator. Journal of Harbin Engineering University, 2017, 38(9): 1461–1469. (in Chinese)

S P Yang, H Yu, J G Liu. Research on power matching and energy saving control of power system in hydraulic excavator. Journal of Mechanical Engineering, 2014, 50(05): 152–160. (in Chinese)

J Yang, L Quan, Y Yang. Excavator energy-saving efficiency based on diesel engine cylinder deactivation technology. Chinese Journal of Mechanical Engineering, 2012, 25(5): 897–904.

Y T Zhang, Q F Wang, Q Xiao, et al. Constant work-point control for parallel hybrid system with capacitor accumulator in hydraulic excavator. Chinese Journal of Mechanical Engineering, 2006, 19(4): 505–508.

T S Kwon, S W Lee, S K Sul, et al. Power control algorithm for hybrid excavator with supercapacitor. IEEE Transactions on Industry Applications, 2010, 46(4): 1447–1455.

H Kim, S Yoo, S Cho. Hybrid control algorithm for fuel consumption of a compound hybrid excavator. Automation in Construction, 2016, 68: 1–10.

T L Lin, W P Huang, H L Ren, et al. New compound energy regeneration system and control strategy for hybrid hydraulic excavators. Automation in Construction, 2016, 68: 11–20.

T L Lin, Q F Wang. Hydraulic accumulator-motor-generator energy regeneration system for a hybrid hydraulic excavator. Chinese Journal of Mechanical Engineering, 2012, 25(6): 1121–1129.

W Shen, J H Jiang, X Su, et al. Control strategy analysis of the hydraulic hybrid excavator. Journal of the Franklin Institute, 2015, 352(2): 541–561.

W Shen, H Huang, Y Pang, et al. Review of the energy saving hydraulic system based on common pressure rail. IEEE Access, 2017, 5: 655–669.

Q Y Hu, H Zhang, S J Tian, et al. Performances analysis of a novel load-sensing hydraulic system with overriding differential pressure control. Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, 2016, 231(23): 4331–4343.

J Cho, J Lee. Simulation-aided testing of electro-hydraulic pump for excavator. Proceedings of the ASME/BATH 2015 Symposium on Fluid Power and Motion Control, Chicago, USA, October 12–14, 2015: 1–8.

Y L Cho, D S Jang, K Y Kim. Development of the energy efficient electro-hydraulic system for excavator. 7th International Fluid Power Conference, Aachen, Germany, March 22–24, 2010: 1–12.

L Lu, B Yao, Energy-saving adaptive robust control of a hydraulic manipulator using five cartridge valves with an accumulator. IEEE Transactions on Industrial Electronics, 2014, 61(12): 7046–7054.

W N Huang, L Quan, J H Huang, et al. Excavator swing system controlled with separate meter-in and meter-out method. Journal of Mechanical Engineering, 2016, 52(20): 159–167. (in Chinese)

A Sitte, J Weber. Structural design of independent metering control systems. 13th Scandinavian International Conference on Fluid Power, Linköping, Sweden, June 3–5, 2013: 261–270.

B Xu, R Q Ding, J H Zhang, et al. Pump/valves coordinate control of the independent metering system for mobile machinery. Automation in Construction, 2015, 57: 98–111.

Z X Dong, W N Huang, L Ge, et al. Research on the performance of hydraulic excavator with pump and valve combined separate meter in and meter out circuits. Journal of Mechanical Engineering, 2016, 52(12): 173–180. (in Chinese)

B Liu, L Quan, L Ge. Research on the performance of hydraulic excavator boom based pressure and flow accordance control with independent metering circuit. Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2016, 231(5): 901–913.

J P Shi, L Quan, X G Zhang, et al. Electro-hydraulic velocity and position control based on independent metering valve control in mobile construction equipment. Automation in Construction, 2018, 94: 73–84.

S Helduser. Electric-hydrostatic drive-an innovative energy-saving power and motion control system. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 1999, 213(5): 427–437.

L Quan, S Helduser. Energy saving and high dynamic hydraulic power unit based on speed variable motor and constant hydraulic pump. China Mechanical Engineering, 2003, 14(7): 606–609. (in Chinese)

T A Minav, J J Pyrhonen, L E Laurila. Permanent magnet synchronous machine sizing: effect on the energy efficiency of an electro-hydraulic forklift. IEEE Transactions on Industrial Electronics, 2012, 59(6): 2466–2474.

Z Yan, L Quan, J H Huang. Characteristics of pulsation and noise in the axial piston pump with displacement and speed compound control. Journal of Mechanical Engineering, 2016, 52(16): 176–184. (in Chinese)

K Roosen, R Bublitz. Energetic optimization of variable speed pump systems towards European Ecodesign directive. The 9th International Fluid Power Conference, Aachen, Germany, March 24–26, 2014: 123–133.

X J Yang, X J Zhang, Y M Gong. Starting characteristics of motor in inverter-motor drive system. Journal of Shanghai University, 2000, 4(2): 140–144. (in Chinese)

M Liu. The energy saving method based on conversion efficiency promoting of hydraulic pump and motor. Hefei University of Technology, 2015. (in Chinese)

J Lux, H Murrenhoff. Experimental loss analysis of displacement controlled pumps. 10th International Fluid Power Conference, Dresden, Germany, March 8–10, 2016: 441–452.

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Chinese Journal of Mechanical Engineering

Tập 32

1-12

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