Energy recovery system for excavators with movable counterweight

• Autorzy: Gawlik A.
• Języki publikacji: EN

Abstrakty

EN

Due to the high fuel costs are developed the different types of energy saving systems that are supposed to increase the productivity of machines per each burned liter of fuel. Paper describes the concept of an active counterweight system designed for excavators. Suggested solution includes both the kinematical structure and the hydraulic system. The hydraulic system 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 mated counterweight cylinder. The aim of investigations is saving energy by machines which can use potential energy of movable counterweight. The research tests are performed for selected work cycle to determine the key parameters of hydraulic system, such as: cylinders velocity, working pressure, oil flow etc. Primary test results compare power consumption for standard and modification system during the same work cycle. The level of energy recovery is promising especially at lower velocities of boom mechanism cylinder. The energy saving for higher boom cylinder velocity will be possible after reduce of pressure drop in hydraulic circuit.

Słowa kluczowe

EN

active counterweight; excavator; homothetic transformation; energy saving

• 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: 2013
• Tom: Vol. 20, No. 2
• Strony: 113--120
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Gawlik A.

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

Bibliografia

• [1] Cetinkunt, S., Pinsopon, U., Chen C., Egelja, A., Anwar, S., Positive flow control of closedcentre electrohydraulic implement-by-wire systems for mobile equipment applications, Mechatronics 14, pp. 403-420, 2004.
• [2] Liang, X., Virvalo, T., Energy reutilization and balance analysis in a hydraulic crane, IHA, Tampere University of Technology, 2003.
• [3] Michalowski, 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] Qing, X., Qingfeng, W., Yanting, Z., Control strategies of power system in hybrid hydraulic excavator, Automation in Construction 17, pp. 361-367, 2008.
• [5] Tianliang, L., Qingfeng, W., Baozan, H., Wen, G., Development of hybrid powered hydraulic construction machinery, Automation in Construction 19, pp. 11-19, 2010.
• [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] www.cat.com, 2013.