Wyniki wyszukiwania - BazTech

1

Influence of the movement of involute profile gears along the off-line of action on the gear tooth position along the line of action direction

Jedliński Łukasz

Eksploatacja i Niezawodność

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2021

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Vol. 23, no. 4

736--744

EN

When gears change their distance along the off-line of action (OLOA) direction, this affects the distance between the working surfaces of the meshing teeth along the line of action (LOA). This effect is usually neglected in studies. To include this effect precise equations are derived for spur gears. The analysis is carried out for the general case of spur gears with shifted profiles frequently used in the industry. The influence of OLOA gear displacement on LOA direction is also a function of gears parameters. An analysis is conducted, and the impact of parameters such as module, pressure angle, gear ratio, and the number of teeth is determined. As an example, a simulation of a 12 DOF analytical model is presented. The movement of gears along OLOA is caused by a frictional force that can be high during tooth degradation e.g. scuffing. Results show that when the movement of gears along the OLOA direction is significant, its influence on the distance between the mating teeth should not be neglected.

2

New Analytical Model of Spur Gears with 5 DOF Shafts and its Comparison with Other DOF Models

Jedliński Łukasz

Advances in Science and Technology. Research Journal

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2021

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Vol. 15, no 1

79--91

EN

This study relates to the research on improving analytical models of gears. A new analytical model of gear shaft with 5 DOF was proposed. Equations of vibration were derived without small-angle approximation and were presented in a form that could be implemented in Simulink. In order to determine the effect of the additional DOF, four popular models having 2 DOF, 4 DOF, 6 DOF and 8 DOF were investigated, too. The proposed model has 12 DOF in total. This number of DOF could be increased; this, however, would result in a greater difference between the considered models, thus making it more difficult to evaluate the impact of the additional DOF of shafts. As a benchmark, the dynamic meshing force in the considered analytical models was calculated. Simulations were carried out with and without friction. Additionally, for the 12 DOF model, the effects of the position of the centre of gear and the centre of mass were investigated.

3

Dynamic Model for Non-Symmetric Dual-Path Gearbox

Drewniak J., Reszuta K.

Machine Dynamics Research

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2018

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Vol. 42, No. 1

45--53

EN

This paper presents a scheme of calculating the dynamic behavior of dual-path gearbox with non-symmetric position of two pinions in regard to gear. The influence of mesh phase and time-varying mesh stiffness of the two spur pinions and one gear was presented. General model with mathematical equations for dual-path gearbox were described. According to Lagrange theorem, the dynamic differential equations were obtained. Based on these equations results of torsional oscillations, internal dynamic meshing forces were calculated as well as dynamic coefficient Kv. Conclusions were made.

4

Dynamic Meshing Forces in Two-Stage Dual-Path Gearbox

Drewniak J., Reszuta K.

Machine Dynamics Research

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2015

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Vol. 39, No. 3

69-80

EN

In this paper, the method of determination of dynamic forces generated in two-stage dualpath gearbox is presented. These forces were evaluated based upon the complex physical 6-DoF-model of the cylindrical two-stage dual-path gearbox. Value of the dynamical factor adequate for the determined loading was calculated.