Measuring instruments used at the research and accuracy of defining the efficiency of drive systems

• Autorzy: Skorek Grzegorz

Identyfikatory

DOI

10.2478/kones-2019-0041

• Języki publikacji: EN

Abstrakty

EN

The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems thanks to the use of high quality sensors and measuring instruments. The types of measuring instruments used on the test stand are presented. The results of experimentally determined efficiencies and simulationally determined efficiencies of two hydrostatic systems with throttling control were compared, which are fed with a constant capacity pump. The choice of the analysed systems is not accidental. There is still a view in the literature about limited possibilities of energy systems with proportional control. The research stand was very carefully designed and made. The applied measuring instruments were characterized by high accuracy of measurements. The issues related to the determination of energy losses and energy efficiency of the engine or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. For laboratory verification, measurement methods were developed, the test stand was adapted and automated. It consists of tested system and loaded system. The measurements during the tests were saved on the computer disk. In order to be able to compare the efficiency of the overall system with the efficiency obtained on the basis of the simulation, coefficients ki determining the energy losses of individual elements of the system were calculated. The research showed a large convergence of the mathematical description of energy losses in the elements of the system and the efficiency of the system with reality. The mathematical model enables accurate simulation determination of the energy efficiency of the system at each point of its field of operation, i.e. at each speed and load of the controlled hydraulic motor. The range of motor speed and load variation can also be accurately determined simulationally.

Słowa kluczowe

EN

energy efficiency; accuracy; measurements; measurement results; measuring instruments

• 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: 2019
• Tom: Vol. 26, No. 2
• Strony: 129--135
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Skorek Grzegorz

• Gdynia Maritime University Department of Engineering Sciences Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone]

Bibliografia

• [1] Paszota, Z., Model of losses and energy efficiency of the hydraulic system with proportional control of the hydraulic cylinder supplied with a constant capacity pump in a variable pressure system, Chapter in monograph: „Research, construction, manufacture and operation of hydraulic systems”, pp. 145-162, Komag, Gliwice 2005.
• [2] Paszota, Z., On power stream in motor or drive system, Polish Maritime Research, Vol. 4, pp. 93-98, Gdansk 2016.
• [3] Paszota, Z., Energy losses in hydrostatic drive. Drive investigation method compatible with diagram of power increase opposite to the direction of power flow, LAP Lambert Academic Publishing, Saarbrucken 2016.
• [4] Skorek, G., Energy characteristics of the hydraulic system with proportional control of cylinder, fed by a constant capacity pump in a constant pressure and variable pressure system (in Polish), Doctor dissertation, Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology, Gdansk 2010.
• [5] Skorek, G., Energy efficiency of a hydrostatic drive with proportional control compared with volumetric control, Polish Maritime Research, Vol. 3, pp. 14-19, Gdansk 2013.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).