Energy-Saving Optimization for Wheel Loader's Double-Pump Confluence Hydraulic System with Fixed-Displacement Pump

Abstract:

The field test results show that existing double-pump confluence hydraulic system with constant displacement pump of wheel loader could only save some energy while the load pressure is rather high (>15Mpa in the tests). However, the load pressure is usually low, especially when the wheel Loader is working on bulldozing operation or just steering and running. Thus, an optimized double-pump confluence hydraulic system was designed by adding a proportional valve and adjust operation rule, so that the output oil of steering pump flow into tank by the proportional valve while the load pressure is low and the relative position of joystick is not large (<72%), and in this way the throttle losses is reduced. Simulation results indicate that the optimized confluence hydraulic system could save 26.2% throttle losses while the wheel Loader is working on bulldozing operation.

• Periodical: Applied Mechanics and Materials (Volume 389)
• Pages: 618-622
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.389.618
• Online since: August 2013
• Authors: Zhao Jun Tan, Yao Jin
• Keywords: Double-Pump Confluence Hydraulic System, Energy Saving, Wheel Loader

References

[1] Liu Liang-chen. Development of Chinese loader market[J]. Construction Machinery, 2011. 3: 30-35.

[2] Gai Jun-xian. Analysis of energy saving effect of Wheel Loader's double-pump confluence hydraulic system[J]. Construction machinery and Equipment, 2005(9): 54-55.

[3] Wang Kai. The working characteristic and energy consumption analysis of the 50 wheel loader's hydraulic system[D]. Jilin: Jilin University, (2011).

[4] Wang Jian-peng, Qin Si-chengTest and model on performance of double pumps and double circuits of hydraulic system of wheel loader[J]. Construction Machinery, 2009. 1: 73-77.

[5] Zhao Shang-fu. Research on energy-savin technique of loader working installment hydraulic system[D]. Jilin: Jilin University, (2006).

[6] Wang Jian-peng, Qin Si-cheng, Zhao Ke-li. Thermal balance of hydraulic system of a 50 type wheel loader[J]. Journal of Jilin University (Engineering and Technology Edition), 2009, 39(3): 652-656.

[7] Shang Tao , Zhao Dingxuan, Xiao Yingkui, et al. Power matching for energy saving control system of hydraulic excavators[J] . Journal of Jilin University (Engineering and Technology Edition), 2004, 34(4): 592-596.

[8] Wagner J R, Marotta E E, Paradis I. Thermal modeling of engine components for temperature prediction and fluid flow regulation [C]/SAE2001-01-1014.

[9] Eduardo Dalla Lana, Victor Juliano De Negri. A new evaluation method for hydraulic gear pump efficiency through temperature measurements[C] /SAE2006-01-3503.

DOI: 10.4271/2006-01-3503