Wyniki wyszukiwania - BazTech

1

Investigation of the Effect of Young’s Modulus on the Contact Strength of Metal Polymer Plain Bearings

Chernets Myron, Pashechko Mykhaylo, Kornienko Anatolii, Borc Jarosław, Zakhariia Roman

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 2

67--73

EN

Using the author's method of research of hybrid (metal-polymer) plain bearings the calculation of their load carrying capacity (contact pressures) is carried out. Studies have been conducted for metal-polymer bearings with a bushing of two types of polymer composites: epoxy based antifriction composite materials DIAMANT Moglice (DIAMANT Metallplastic GmbH) and DK6 (PT) (fillers - graphite, MoS2, Zr). The elastic constants of composite materials, in particular the Young's modulus, have a noticeable effect on the contact pressures in metal-polymer bearings. The Young's modulus is significantly different in these composite materials. In accordance with this factor, the influence of load, bushing diameter and radial clearance on the maximum contact pressures was studied. Quantitative and qualitative regularities of maximum contact pressures from the accepted factors of influence: Young's modulus, loading, bushing diameter, radial clearance, type of bushing material are established. The obtained results are compared with the results obtained by known conventional calculating methods of contact pressures.

2

Calculation of Contact Pressures in Cylindrical Metal-Polymer Sliding Guides

Chernets Myron, Pashechko Mykhaylo, Kornienko Anatolii, Ishchenko Anatoly

Advances in Science and Technology. Research Journal

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2021

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Vol. 15, no 3

30--33

EN

Guides (linear plain bearings) of reciprocating motion are widely used in many areas of human activity. However, at present there are no reasonable methods for their calculation, in particular metal-polymer guides. The author's method of contact strength calculation of cylindrical metal-polymer sliding guides is presented in the article. The effect of load, bushing diameter and radial clearance on the maximum contact pressures and their distribution in the guide was studied on the example of epoxy-based polymer composite material Moglice of the German company DIAMANT Metallplastic GmbH, which is used to restore tribotechnical sliding systems elements. Quantitative and qualitative regularities of dependence of contact pressures on the accepted factors of influence are established: at loading increase four times the maximum contact pressures and contact angles will increase twice irrespective of change of sizes of a radial clearance and diameter of a base; increasing the base diameter leads to a directly proportional decrease in maximum contact pressures; doubling the radial clearance leads to a -fold increase in pressure, regardless of changes in the magnitude of the load and the diameter of the base. Regularities of change of contact parameters from the specified factors are given graphically.

3

On the Question of Methodology of Hybrid Sliding Bearings Estimated Load Capacity and Durability Evaluation

Chernets Myron, Pashechko Mykhaylo, Kornienko Anatolii, Chernets Juriy, Fedorchuk Svetlana

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 4

177--184

EN

The computational method of hybrid (metal-polymer) sliding bearings according to the load capacity and durability of the bushing made of polyamide filled with glass or carbon dispersed fibers was presented. The initial contact pressures were calculated and the influence of bushing wear on their relative reduction was investigated. The wear resistance of bearings with bushings made of both polymer composites was also evaluated. Regularities of their change from loading, diameter of the bushing and radial clearance were established.

4

Computer Simulation of the Impact of Optimization of Width in the Helical Cylindrical Gear on Bearing and Durability. Part 2. Angular Correction of the Gear Profile

Czerniec Myron

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 2

1--6

EN

On the basis of the elaborated calculation method, the optimal width in involute helical gears was determined ensuring a constant length of the line of contact between the meshing gears that is based on the novel method for determining the wear and durability of the gears which was employed to measure the maximum contact pressures, linear wear of teeth and durability of the gear with angular correction of the profile. It was possible to determine the variations in the parameters for the optimized gear describing the meshing gears at different values of the profile correction coefficients.

5

Computer Simulation of the Impact of Optimization of Width in the Helical Cylindrical Gear on Bearing and Durability Part 1. Height Correction of the Gear Profile

Czerniec Myron

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 1

52--59

EN

Based on the elaborated calculation method he authors method for determining the wear and durability of gears was employed to measure the maximum contact pressures, linear wear of teeth and durability of the gear with height correction of the profile. The optimal condition width in involute helical gears is indicated ensuring constant length of the line of contact between the meshing gears. As a result, it was possible to determine variations in the parameters for the optimized gear describing the meshing gears at different values of the profile correction coefficients.

6

A study on the impact of teeth meshing conditions and profile correction on the carrying capacity, wear, and life of a cylindrical gear

Chernets M., Kiełbiński J., Chernets J.

Tribologia

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2016

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nr 2

25--43

EN

Using an innovative method for determining wear and life of toothed gears, the author investigates the effect of teeth meshing in a mixed (double-single-double) tooth engagement of cylindrical helical gears on their contact strength, wear, and service life. The paper also presents a method for determining zones of double and single tooth engagement. It is found that gear profile correction leads to a reduction in maximum contact pressures by about 15–20%, depending on the applied type of correction. The distribution of pressures greatly depends on the conditions of tooth engagement. The wear of teeth is also significantly affected by their meshing conditions. Depending on the type of correction applied and its coefficients, the allowable limit of gear tooth wear will occur at different points of contact: at the beginning of double tooth engagement and at the beginning or end of single-tooth engagement. It is show that the service life of gears can be considerably prolonged if optimum correction coefficients are applied. Specifically, height correction increases the gear life by 1.66 times while angular correction prolongs the service life of gears by up to two times.

PL

Na podstawie autorskiej metody obliczenia zużycia warstwy wierzchniej na wysokości czynnej zębów i trwałości przekładni zębatych przeprowadzono badania wpływu warunków interakcji zębów z uwzględnieniem parowości ich zazębienia w walcowej przekładni zębatej o zębach skośnych. Rozważono także wpływ korekcji technologicznej (P-O) i konstrukcyjnej (P) na wytrzymałość kontaktową, zużycie oraz trwałość. Przedstawiono sposób określenia stref występowania dwuparowego oraz jednoparowego zazębienia. Ustalono, że korekcja zazębienia powoduje obniżenie maksymalnych nacisków stykowych w granicach 15–20% zależnie od jej rodzaju. Rozkład nacisków w znacznym stopniu zależy od warunków zazębienia zębów. Na przebieg zużywania zębów znacząco wpływają warunki ich interakcji. W zależności od wartości współczynników korekcji oraz jej rodzaju zużycie dopuszczalne zębów koła zębatego wystąpi w różnych charakterystycznych punktach styku: na wejściu w zazębienie dwuparowe, na wejściu lub wyjściu z zazębienia jednoparowego. W wyniku rozwiązania numerycznego ustalono również, że resurs przekładni przy wyborze optymalnych wartości współczynników korekcji może ulec znacznemu podwyższeniu: przy korekcji technologicznej do 1,66 razy, a przy korekcji konstrukcyjnej ok. 2-krotnie.