Wyniki wyszukiwania - BazTech

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Wpływ zmiany głębokości skrawania na wartość sił skrawania i parametr chropowatości powierzchni podczas toczenia czopów wałów

Labuda W., Kozyra D.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2016

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nr 96

82--92

PL

W artykule przedstawiono wyniki badań wpływu zmiany głębokości skrawania na wartość sił skrawania oraz parametr chropowatości powierzchni czopów wałów. Badania przeprowadzono na wałku o średnicy 50 mm wykonanym ze stali konstrukcyjnej S235JR. Proces toczenia czopów wału przeprowadzono na tokarce uniwersalnej kołowej CU500MRD. Podczas badań wykorzystano nóż tokarski z wymienną płytką skrawającą CCMT09T304 PF. Natomiast pomiar sił skrawania podczas toczenia rejestrowano przy użyciu siłomierza firmy Kistler. Pomiar parametrów chropowatości wykonano na profilometrze W20. Do badań wykorzystano również współrzędnościową optyczną maszynę pomiarową Baty Venture Plus oraz optyczny spektrometr emisyjny Solaris.

EN

The paper presents the results of influence of changes in the depth of cut on the value of the cutting forces and surface roughness parameters of shaft pins. The turning process of shaft pins φ 50 mm in diameter, made of S235JR steel was carried out on a CU500MRD universal machine. The lathing process was conducted by a cutting tool with CCMT 09T304 PF removable inserts. The measurement of cutting forces during turning was recorded using a dynamometer made by Kistler. The measurement of surface roughness parameter was performed by W20 profilometer. For research also used the Baty Venture optical coordinate measuring machine and the Solaris optical emission spectrometer.

2

Opportunities analysis of regeneration of plane front plate thruster on a universal lathe

Iwanicki L., Kyzioł L., Kielich K., Kozyra D.

Journal of KONES

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2015

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Vol. 22, No. 4

103--108

EN

The bow thrusters are devices, which make vessels manoeuvring much easier especially in the harbours or the straits with high intensity of the traffic vessels. The long-term exploitation of these devices causes damages, mainly for its propeller blades. The cavitation is the main cause of its damages. Technical condition of all thrusters components mainly taking into account blades are subjected to periodic inspection according to classification societies. In this article have been included examples of bad condition of the thruster blades caused by cavitation process or mechanical damages. These damages can be dangerous enough to turn off the device and make the vessel be out of exploitation. The thruster blades repairing are a very complicated and hazardous venture. The blades are large sized, unbalanced, heavy components and difficult to be mounted in lathes. The main aim of this work is to identify opportunities of thruster blades repair process. The article presents technological problems of blade regeneration with the lathe as a complicated solid, which causes very big problems with the setting axis the component. The thesis presents methods of attach propeller blades using the special handle and tusk lathes. Among others, research allowed defining operation rotating velocity, and other parameters related to mechanical regeneration. The researches have shown that presented method in practice allows for secure mechanical regeneration of blades thrusters.

3

Biofouling, czyli porastanie statków – systemy zwalczania i wpływ na środowisko morskie

Kielich K, Kozyra D.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2014

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nr 83

89--97

PL

W artykule zwrócono uwagę na problem porastania elementów statku, mających bezpośredni kontakt z wodą. Jest to jeden z czynników powodujący wzrost kosztów eksploatacji statków. Zaprezentowano również wymagania dotyczące farb antyporostowych oraz substancje szkodliwe w nich zawarte. Artykuł przedstawia, jak bardzo ważne dla statków są powłoki antyporostowe, jednocześnie ukazując ich negatywny wpływ na środowisko morskie. Omawia również, od czego zależy szybkość i stopień porastania kadłuba statku przez faunę i florę morską.

EN

In article attention was drawn to the problems with fouling elements of ship, that have direct contact with water. It is one of the factors causing increase the cost of exploitation of ships. It also presents requirements of antifoouling paints and contained in them harmful substances. The paper presents as very important are antifouling shell for the ships, but also reveals how adversely affect them on the marine environment. Finally, it include dependance of rate and quantity of overgrowing hull by marine flora and fauna.

4

Spin test : the ability of spin test method usage in thrusters' fault detection and isolation

Iwanicki L., Kyzioł L., Kozyra D., Tarsa R.

Journal of KONES

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2014

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Vol. 21, No. 4

177--182

EN

In the article below, we presented the possibility of „spin test“ method usage for medium rotational speed devices such as thrusters', which are used to enhance the maneuverability of maritime vessels. The reason for the analysis is the problem of eliminating the unwanted vibrations of thruster's propeller with commonly used methods. It is an innovative solution for accurate verification of the technical condition of screw propellers, which are the most common devices used as the propelling element of thrusters. In the introduction the possibility of thruster's diagnosis using „spin test“ has been described. Commonly used thrusters' and their working conditions were presented. In order to properly assess the technical condition of rotational speed devices, such as thrusters' propellers after their production or renovation it is vital to provide an additional diagnosis in the environment similar to working conditions. Secondly, the problem of spinning parts' vibration was described. „Spin test“ method presented here gives the ability of detailed analysis of spinning parts' vibration. The idea of a compact and easy to assemble station enabling to conduct such research has been shown. The station not only allows to measure the eigenfrequency of vanes' in normal mode and compare it with the previously calculated ones, but also enables material's endurance testing at speeds higher than nominal speed. Finally, we presented the range of using this method in different fields along with the benefits of ‘Spin Tests’.