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1
Content available Teeth deformation of non-circular gears
Maláková Silvia
Zeszyty Naukowe. Transport / Politechnika Śląska
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2021
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z. 110
105--114
EN
In practice, gear units whose transmission number is not constant during one revolution are used. Such gears include the proposed elliptical transmission. Its application can be (missing a word?) and the automotive industry. The gears set consists of a pair of identical elliptical gears. The transmission ratio of the designed elliptical gear is not constant. The basic kinematic characteristics of this transmission are described in this work. The deformation in contact point of non - circular gears is determined by the finite element method in this paper. The results are compared with the deformation of the teeth of the spur gears.
2
Content available Influence of the face width and length of contact on teeth deformation and stiffness
Medvecká-Beňová S.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2016
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z. 91
99--106
EN
Gear teeth are deformed due to load. Recently, given the increasingly evolving computer technology, supported by the available literature, we have modern numerical methods at our disposal, such as the finite element method (FEM), which serves as one of the methods for the determination of teeth deformation in the gearing. This paper mainly deals with deformation distribution across the teeth’s face width in relation to the load width of the teeth when meshing occurs. The solution for teeth deformation of spur gears is provided by the FEM.
3
Content available Deformation and stiffness of spur gear teeth and their influence on gear noise
Medvecká-Beňová S.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2015
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z. 89
101--107
EN
Gear teeth are deformed due to the load. The deformation of gear teeth is causing some negative as well as positive effects. A tooth has a complex shape and due to the complex shape of the teeth, a theoretical determination of the deformation is difficult. The existing experimental techniques are based on static deflection measurements gearing loaded of constant force or seismic measurement deviations at slow rotation. Recently, at ever faster evolving computer technology and the available literature, we can encounter modern numerical methods, such as finite element method (FEM), which can serve as methods for the determination of teeth of gearing. The article is devoted to the problems of gearing stiffness analysis. The problem is solved for spur gears. Deformation analysis solved by FEM is used for calculations of the gearing stiffness. There are many influences that cause vibrations in the gearbox and that have to be taken into account already in the phase of design, manufacture, installation and operation. Detailed analysis of gearboxes manufacturers have shown that improving of the gear accuracy cannot reduce the transmission unit noise to the desired level. Only fundamental changes to the shape of the tooth and changes in production technology can achieve stronger noise reduction of gear mechanism.
4
Content available remote Problem zdolności kształtowej i wymiarowej materiału na koła zębate w procesie obróbki cieplno-chemicznej
Zwolak J.
Problemy Eksploatacji
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1999
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nr 4
263-273
PL
W pracy przedstawiono zagadnienia dotyczące odkształceń zarysu ewolwentowego zębów kół zębatych występujących podczas obróbki cieplno-chemicznej. Spośród pięciu wymienionych materiałów stosowanych na koła zębate wyszczególniono stal 8620 oraz stal 4817. Są to stale mające zdolność zachowania stabilności kształtowej i wymiarowej po zakończeniu obróbki cieplno-chemicznej. Na podstawie badań eksperymentalnych zbudowano model graficzny odkształceń zarysu zęba, który następnie posłużył do ustalenia kierunku i wartości stosowanej modyfikacji technologicznej.
EN
The problems of the involuta profila deformations in the process of heat- chemical treatment owe presentandt in the paper. Two materials hove been specified from all live used in touthed wheeles monoufacture and normaly: stal 8620 and stal 4817. These steels hove the ability to preserve the form and dimension stability after heat-chemical treatment. The graphical model of the toath profile deformation has beed developed on the base of experiment. This model was therafter used in the orrangement of direction and the value of modification of process.
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