Energy saving system for off-road machines by the use of the movable counterweight energy recuperation

• Autorzy: Gawlik A.

Identyfikatory

DOI

10.5604/12314005.1133180

• Języki publikacji: EN

Abstrakty

EN

In this paper, concept of energy saving by the use the special recuperation system for hydraulic excavator is studied. This solution is alternative to commercial projects of hybrid systems, which store energy in the hydro pneumatic accumulators or the super capacitors. Suggested solution includes designed system of active counterweight, which cooperates with working mechanism of machine. The hydraulic circuit of active counterweight is connected with the boom standard hydraulic system. The counterweight mechanism is homothetic to working mechanism of the excavator. The homothetic transformation applies to kinematical structure and positions of the centres of gravity. The homothetic transformation provides to static unloading of boom cylinder by the connected counterweight cylinder. The possibility of energy saving by using movable counterweight was estimated during tests. The key parameters of hydraulic system, such as: cylinders velocity, working pressure, oil flow and another were measured on prepared research stand. The comparison of power consumption for standard and modification system during the same work cycles allowed confirms the correctness of the suggested concept for energy saving system. Energy saving ratios for modified hydraulic circuit was calculated for different velocity of boom cylinder and payloads. The active counterweight system for low velocity cylinder of excavator mechanism is ready to application. The hydraulic circuit for higher value of boom cylinder velocity requires resize a few elements for example supply lines.

Słowa kluczowe

EN

active counterweight; excavator; homothetic transformation; energy saving; potential energy recuperation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2014
• Tom: Vol. 21, No. 3
• Strony: 105--112
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Gawlik A.

• Cracow University of Technology Institute of Machine Design Jana Pawła II Av. 37, 31-864 Cracow, Poland tel.:[phone]

Bibliografia

• [1] Gawlik, A., Energy recovery system for excavators with movable counterweight, Journal of KONES Powertrain and Transport, Vol. 20, No. 2, pp. 113-120, Warsaw 2013.
• [2] Liang, X., Virvalo, T., Energy reutilization and balance analysis in a hydraulic crane, IHA, Tampere University ofTechnology, 2003.
• [3] Michałowski, S., Gawlik, A., Concept of active counterweight system for medium size excavators, Proc. Of 5-th FPNI-Phd Symposium, pp. 462-465, Cracow 2008.
• [4] Minav, T., Hanninen, H., Sinkkonen, A., Laurila, L., Electric or hydraulic energy recovery systems in a reach truck - a comparison, Journal of Mechanical Engineering 4, pp. 232-240, 2014.
• [5] Ochiai, M., Adaption of hybrid drive in construction machinery and hybrid excavators, Japan Construction Machinery and Construction Association, pp. 35-39, 2009.
• [6] Qing, X., Qingfeng, W., Yanting, Z., Control strategies of power system in hybrid hydraulic excavator, Automation in Construction 17, pp. 361-367, 2008.
• [7] Sobczyk, A., Improvement of hydraulic system efficiency by means of energy recuperation, Cracow University ofTechnology, Monograph 403, Cracow 2011.
• [8] Tianliang, L., Qingfeng, W., Baozan, H., Wen, G., Development of hybrid powered hydraulic construction machinery, Automation in Construction 19, pp. 11-19, 2010.
• [9] Weidong, L., Kaikai, S., Wei, L., Jun, X., Research on potential energy recovery of 16T wheeled hybrid excavator, Second International Conference on Digital Manufacturing and Automation, pp. 996-998, Hunan 2011.