
Krzysztof OlejarczykCasimir Pulaski Radom University · Faculty of Mechanical Engineering
Krzysztof Olejarczyk
PhD
About
24
Publications
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Introduction
Krzysztof Olejarczyk works at the Faculty of Mechanical Engineering, Casimir Pulaski Radom University. He research in Mechanical Engineering. The current project is 'Development of cyclo gearbox'.
Publications
Publications (24)
The influence of selected geometrical parameters on the shape of a cycloidal
disc and the influence of design parameters
The article presents a method for diagnosing cycloidal gear damage on a laboratory stand. The damage was simulated by removing the sliding sleeves from two adjacent external pins of the cycloidal gearbox. Damage to the sliding sleeves may occur under operating conditions and can lead to the destruction of the gear unit. Hence, early detection is es...
The article presents the results of a geometrical surface texture study of cycloid drive discs after bench tests. For this purpose, the working surfaces, such as peak and valley areas of the epicycloid and the holes inner surfaces of both discs, were investigated using contact profilometry. From each surface, a transverse profiles were extracted, b...
In the paper, an issue of CMM measurement strategy of the sleeves and pins designed for wear tests in the cycloidal drive. The measurement strategy was proposed, based on initial out-of-roundness measurement in scanning mode. Proposed approach ensured that the pin was measured along its entire 40 mm length with only small area of fixation ca. 5 mm...
In the paper, the issue of sliding sleeves wear in a cycloidal transmission is addressed. The working model of a cycloidal drive was constructed and tested in the special rig, and its sleeves underwent detailed analysis afterwards. The sleeves were produced by sintering technique out of Selfoil bronze with self-lubricating properties. In particular...
A comparative study of a cycloidal gearbox working with a different kind of bearings is presented in the article. Two kinds of the bearings used in the cycloidal gearbox are taken into consideration: sleeves and needle bearings. The theoretical efficiency calculation for both types of the bearing was compared with experimental results. The experime...
The article presents a theoretical efficiency calculation of a one stage cycloidal gearbox and its experimental verification on the testing bench. The methodology of numerical calculation is presented in the first part of the article. The gearbox power loss was divided into separate parts, and its presentation on a percentage share plot shows compo...
Cycloidal gearboxes are mechanisms which can work under higher loading conditions than other sprockets with comparable dimensions. Cycloidal gears can be smaller than other gears because in these complex mechanisms many lobes work at the same time. In this article, Levenberg-Marquardt algorithm for solving non-linear least squares problems is used...
The article discusses the problem of a torque ripple on the output shaft of a cycloidal gearbox. To investigate the phenomenon, numerical simulations were performed and compared with the experimental results. Simulations were performed with multibody dynamic software—one with rigid and second with flexible elements. The dynamic model of the gearbox...
Comparative study of the cycloidal gearbox working with a different kind of bearings is presented in the article. Two kinds of the bearings used in the cycloidal gearbox are taken into consideration: sleeves and needle bearings. Theoretical efficiency calculation for both kinds of the bearing was compared with experimental results. The experiment w...
Abstract. The article undertakes the problem of a torque ripple on the output shaft of the cycloidal gearbox. To investigate the phenomenon two numerical simulations were performed and compared with experimental results. The test was made on the gearbox calculated, designed, and tested by the article authors. To perform the test a testing bench was...
The article undertakes the problem of vibrations induced in the cycloidal gearbox. The gearbox was calculated, designed and tested by the article authors. To perform the test a testing bench was built. The bench includes electric motors, torque meters and application to control working parameters. The input engine works at constant velocity mode an...
In the paper, the measurement of the marine diesel engine crankshaft residual stresses is presented. The hole drilling strain gauge was chosen because of its simplicity and low cost. Moreover, deflection calculation was made for the load corresponding to its weight and the concentrated force in the chosen bearing conditions. Deflection of the journ...
Cyclo gear design requires the use of an appropriate amount of lubricant, and the respective properties.
The article presents an analysis of the impact of the amount of used lubricant: mineral oil and synthetic oil, on its tempera-ture and the efficiency of the prototype cyclo gear.
The paper presents a study of the impact of oil mineral-based and synthetic-based oils on the efficiency of
the single stage cycloidal gear. Experimental studies were carried out for different loads and input speeds of
the gears. The reference levels were the results of theoretical calculations of efficiency of the cycloidal gear
obtained at the...
W artykule zawarto obliczenia sprawności teoretycznej jednostopniowej przekładni cykloidalnej, które następnie zostały poddane weryfikacji podczas badań stanowiskowych dla różnych obciążeń i prędkości przekładni. Referencyjnym poziomem odniesienia był wynik sprawności teoretycznej obliczony dla przekładni cykloidalnej przy
odpowiadającym z badań o...
Experimental determination of the frequency of vibration were conducted for test bench of cyclo reducer. The tests were performed for each main direction: X, Y, Z). The experimental values were compared with the results of theoretical calcula-tions. The studies were also conducted an additional load test bench and determination of the frequency of...
Currently, the latest generation CNC machine allows to produce cycloid gear requiring very high accuracy of its individual components.
These gears are characterized by higher efficiency and reliability, and lower energy consumption compared with widespread heavy, noisy and outdated tech gear of involute curve.
One of the most important components o...
On the basis of the documentation, the finite element beam model of the Shukhov’s tower has been constructed. In 1970–1971, after 50 years of exploitation, the study of the Shukhov’s tower was conducted by the specialists. This study has revealed serious defects of the individual elements. It was found that the rolled profiles reaches 10 % of the c...