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Impact of the Geometry Accuracy of the Cycloidal Gear Output Shaft with Pins of the Efficiency and Vibrations

References [1] Chmurawa, M., Obiegowe przekładnie cykloidalne z modyfikacją zazębienia , Zeszyty Naukowe Politechniki Śląskiej, Mechanika, Z. 140, Gliwice 2002 [2] Pawelski, Z., Uszpolewicz, G., Zdziennicki, Z., Właściwości trójtarczowej przekładni cykloidalnej jako wynik badań stanowiskowych , Journal of KONES, 2018. [3] Mackic, T., Blagojevic, M., Babic, Z., Kostic, N., Influence of design parameters on cyclo drive efficiency , Journal of the Balkan Tribological Association, Vol. 19, No. 4, pp. 497-507, 2013. [4] Blagojevic, M., Kocic

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Assessment Method of End-of-Life Vehicles Recycling Network Efficiency

International, Warszawa 2014. [10] Kaufman, S. M., Krishnan, N., Themelis, N. J., A screening life cycle metric to benchmark the environmental sustainability of waste management systems , Environmental Science & Technology, Vol. 44, pp. 5949-5955, 2010. [11] Leu, H-G., Lin, S. H., Cost-benefit analysis of resource material recycling , Resources, Conservation and Recycling, Vol. 23, pp. 183-192, 1998. [12] Marques, R. C., Ferreira da Cruz, N., Carvalho, P., Assessing and exploring (in)efficiency in Portuguese recycling systems using non-parametric methods

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Measuring Instruments Used at the Research and Accuracy of Defining the Efficiency of Drive Systems

References [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

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Influence the Applied Control Structure on Energy Efficiency of the Hydrostatic System

References [1] Paszota, Z., Energy saving in a hydraulic servomechanism system – theory and examples of laboratory verification, No. 58, pp. 146-157, Brodogradnja 2007. [2] Paszota, Z., Method of evaluation of the energy efficiency of systems with hydraulic linear motor – cylinder , Report BW 611/95 (in Polish), p. 76, Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology, Gdansk 1995. [3] Paszota, Z., Hydraulic individual system with constant capacity pump and proportional cylinder control – the loss and energy

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Properties of a Three Disc Cycloid Gear as a Result of Bench Test

Abstract

The most common design solution are cycloidal gearboxes with two discs, in which the reaction forces of bearings from the working discs create a bending moment on the high-speed input shaft, additionally affecting bearings. In the article are presented the results of tests of the cycloid gear prototype with three discs. Instead of the second disc, the introduction of two side discs, 1800 from the centre disc, allows you to reduce this moment to zero. To compensate for the unbalance of the shaft, the side discs have half the width of the centre disc. Each disc works with its own, separate set of bronze rollers, separated by Teflon washers, which should reduce the friction forces. In the article are presented the results of the tests of the cycloid gear prototype determining basic parameters such as efficiency, torque fluctuations on the input and output shaft, housing vibrations in three directions. FFT analysis of registered parameters showed high compliance of the designated frequencies for different measured signals. The assumed advantages, i.e. high efficiency and low vibration level in the tested range, were confirmed. The results are presented in the form of three-dimensional graphs as functions of speed and torque. High efficiency (80-90) % was obtained for load moments above 150 Nm, which is practically independent of the rotational speed with which the cycloid gearing works. The oil temperature during the tests was maintained in the range of 36°C ± 2°C. The maximal torque of the cycloidal gear was 500 Nm.

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Friction Losses in a Linear Hydraulic Motor as a Result of the Influence of the Control Structure and Oil Viscosity

References [1] Paszota, Z., Energy losses in hydrostatic drive. Monography , LAP Lambert, Acadamic Publishing, p. 570, Saarbrucken 2015. [2] Piątek, D., Study of energetic behaviour of the cylinder as a result of the throttling control structure , VII Conference: Shipbuilding and Ocean Engineering, Integrated Transport, University Publishing, pp. 184-192, Gdansk 2004. [3] Pietrzak, M., Okularczyk, W., The efficiency of the hydraulic cylinder , Hydraulics and Pneumatics, No. 2, pp. 21-24, Wroclaw 2012. [4] Skorek, G., Energy

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Planning and Building 100% Renewable Energy Infrastructure with the Technologies of the Future

://www.ecsite.eu/sites/default/files/170607_energie-wenden_deutsches_museum_web.pdf . [5] Climate change: How do we know ? https://climate.nasa.gov/evidence/ . [6] Synergies between renewable energy and energy efficiency , http://www.irena.org/publications/2017/Aug/Synergies-between-renewable-energy-and-energy-efficiency , 2017. [7] Perez, M., Perez, I. E. A., A fundamental look at supply side energy reserves for the planet , SHC Task 46: Solar Resource Assessment and Forecasting, November 2015, https://www.iea-shc.org/data/sites/1/publications/2015-11-A

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Experimental Research of the Material Filtration Characteristics with Nanofibers Addition

-216, 2009. [14] Jaroszczyk, T., Fallon, S. L., Schwartz, S. W., Development of high dust capacity, high efficiency engine air filter with nanofibers , Journal of KONES Powertrain and Transport, Vol. 15, No. 3, pp. 215-224, 2008. [15] Khajavi, R., Abbasipour, M., Bahador, A., Electrospun biodegradable nanofibers scaffolds for bone tissue engineering , Journal Appl. Polym. Sci, Vol. 133 (3), pp. 42883, 2016. [16] Li, D., Xia, Y., Electrospinning of nanofibers: reinventing the wheel?, Adv. Mater., Vol. 16 (14), pp. 1150-1170, 2004. [17] Lo, L

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Performance Characteristics of Panel Filters for Internal Combustion Engine Inlet Air Working in a Two-Stage Configuration

Transport, Vol. 16, No. 4, pp. 207-216, 2009. [14] Jaroszczyk, T., Fallon, S. L., Schwartz, S. W., Development of high dust capacity, high efficiency engine air filter with nanofibers , Journal of KONES Powertrain and Transport, Vol. 15, No. 3, pp. 215-224, 2008. [15] Jaroszczyk, T., Pardue, B.A., Holm, Ch.E., Recent advances in engine air cleaners design and evaluation , Journal of KONES Powertrain and Transport, Vol. 11, No. 1-2, pp. 259-275, 2004. [16] Jo, Y., Tien, Ch., Ray, M. B., Development of a post cyclone to improve the efficiency of reverse

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Multidimensional Simulation of Combustion and Knock Onset in Gas Engines

Abstract

Natural gas fuelled internal combustion engines enable efficient energy conversion with relatively low environmental impact. Depending on the specific application, the available fuel quality, and the emission regulations to be fulfilled, different types of gas-engine combustion systems are in use. The major performance and hence efficiency limiting factors in gas fuelled engines are related to the lower ignitability of natural gas at part load and the appearance of abnormal combustion (knock) at high load conditions. This article provides an overview of the multidimensional CFD simulation workflow for the investigation and assessment of flame propagation and knock onset characteristics in different types of natural gas fuelled internal combustion engines. The most common approaches for simulating flame propagation/combustion under engine conditions are presented together with selected models for describing the pre-flame reactions finally leading to knock onset in the unburned in-cylinder charge ahead of the flame. Based on selected application examples, the models’ performance and capabilities with respect to reflecting the essential characteristics of flame propagation and knock onset are presented.

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