Informace o tématu

Název práce:	Diagnostics of cavitation phenomena in a hydraulic shock absorber
Úroveň:	BSc Thesis
Pokračování práce:	Nothing
Vedoucí práce:	M.Sc. Miloš Müller, Ph.D. +420485353428
Konzultant:	-
Anotace:	The bachelor thesis is focused on the diagnostic of cavitation in the shock absorber. The introductory chapter includes the design description and working principles of basic types of shock absorbers. The review of hydraulic liquids and their properties are introduced in the following chapter. The density, surface tension and viscosity measurements were performed for the hydraulic fluid used in following measurements. The following chapter includes theoretical introduction to the cavitation phenomena. Next part of the work is focused on methods used in the cavitation diagnostic. A special emphasis is placed on methods and devices available in the laboratories of the Technical university of Liberec. The measurement chapter describes applications of selected methods on the cavitation diagnostics on the calibration chamber. The description of the devices and results of the individual measurements using acoustic bubble spectrometer and optical methods (shadow photography) are given in this chapter. The final part of the work describes cavitation chamber for the detection of cavitation in the real shock absorbers and measurement methodology on this device.
Předpokládaný výsledek:	Provést rešerši literatury zabývající se vznikem kavitace v hydraulickém oleji Popsat metody vhodné k diagnostice kavitace v hydraulickém oleji (optické, akustické) Provést kalibrační měření spektra bublinek pomocí ABS na zkušební trati Zpracovat metodiku měření kavitace na kavitační komoře Provést úvodní měření vzniku a vývoje kavitace za škrtícím elementem hydraulického tlumiče na kavitační komoře
Literatura:	Brdička M., Samek L., Taraba O.: Kavitace, Diagnostika a technické využití. SNTL. Praha. 1981, 336 s. Noskijevič J.: Kavitace. Academia. Praha. 1969, 280 s. Dixon J. C.: The shock absorber handbook, Wiley-Professional Engineering Publishing Series, John Wiley and Sons, Ltd., 2007 Meged Y., Venner C.H., Napel W.E.: Classification of lubricants according to cavitation criteria, Wear, Elsevier Science S.A., 1995, pp. 444-453 Martin C.S., Medlarz H., Wiggert D.C., Brennen C.: Cavitation inception in spool valves, Journal of Fluids Engineering, ASME, 1981, pp. 564-576 Kollek W., Kudzma Z., Stosiak M., J. Mackiewicz.: Possibilities of diagnosing cavitation in hydraulic systems, Archives of civil and mechanical engineering, 2007, pp. 61-73 Koivula T.: On cavitation in fluid power, Proc. of 1st FPNI-PhD Symp. Hamburk, 2000, pp. 371-382
Zadavatel:	KEZ
Datum zveřejnění:	04.01.2010

Zvoleno dne:	04.01.2010
Zvoleno studentem:	Hujer, Jan

Obhájeno dne:	22.06.2010
Obhájeno s hodnocením:	Succeeded

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