Scientific Journal of Silesian University of Technology. Series Transport

6

Authors: Matej URBANSKÝ, Peter KAŠŠAY

At our department we deal with torsional oscillating mechanical systems (TOMS) continuous tuning during its operation in terms of torsional oscillation size. Therefore was build the new mobile device for research and presentation purposes of the TOMS continuous tuning using extremal control method. This paper deals mainly with design of the mobile device and its special compressed air distribution system, which is necessary for its regular function.

7

Authors: Silvia MEDVECKÁ-BEŇOVÁ

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.

7

Authors: Jarmila VOJTKOVÁ

Asymmetrical involute gears have a different value of the operating pressure angle for right and left side of the gear. These teeth are suitable for one direction of rotation. Such teeth enable to change the length of the generating line. They enable to improve the value of reduced radii of curvature. Asymmetrical teeth allow reducing the values of Hertz's pressures, especially on the root of the teeth. Hertz pressures are directly related to the asymmetry.

9

Authors: Henryk JAFERNIK, Robert SKLORZ

This article outlines initiatives leading to reduction of fuel consumption and emissions of carbon dioxide by civil passenger aircrafts during ground operations. Airbus A320, one of the most popular nowadays airliners serves as an example. The article refers to initiatives related to operators, manufacturers as well as Air Traffic Control units. Detailed analysis of specific fuel efficiency initiative has been limited to one exemplary flight. Results of analysis can be used as a basis to calculation of gross savings in relation to specific airport.

9

Authors: Jacek MICHALSKI

The paper presents the technological process of abrasive-chemical machining wheel bearing surface of the cylindrical herringbone gears planetary gear in vibrating container smoothing machine according to Isotropic Finishing ISF® technology of the REM Chemicals Inc. company. Gear wheels are made of stainless Pyrowear 53 and subjected to carburizing, hardening, cold working and low tempering. The change in value of deviation indicators for the kinematic accuracy, smoothness and geometric structure of the machined surfaces of the gear teeth after smoothing compared with the contoured grinding were analyzed. The findings are different a characteristic performance on the surface of the tooth side along the outline, especially with a higher value at the head of the tooths. This creates a need for appropriate modification of the lateral surface of the teeth in the process of contoured grinding. The results of the mechanical strength of the samples gear wheel after the smoothing process and evaluating the hydrogen embrittlement are presented.

9

Authors: Katarzyna TUROŃ, Dagmara GOLBA, Piotr CZECH

The article presented the analysis of progress CSR good practices areas in logistic companies. Authors considered areas of good practices, which were reported by DB Schenker and Raben Group to “Responsible Business in Poland. Good Practices” from 2010 to 2014. The authors also verified the occurrence of niche in logistic CSR areas, which could be used by the other companies that starts their CSR activities.

10

Authors: Henryk JAFERNIK, Radosław FELLNER

The functioning of general aviation aerodromes in Poland are regulated by more than 20 national and international legal acts. Knowledge about air law and its application ensures safe operations and flights at aerodromes and airfields. This paper summarizes source of law for general aviation and associated with its development strategies and reports. In the development of general aviation important role play small aerodromes, which are a “meeting point” for air transport sector and local economy, increase investments and tourism attractiveness of the region as well as are "meaningful way for the development of the region". Despite this, there is no legal act comprehensively regulating the issue of financial support for investment at important local aerodromes.

11

Authors: Michał BATSCH

Article presents mathematical model of convexo-concave Novikov gear mesh. The parametric equations of teeth surface, units normal as well as main curvatures and main direction were obtained. Moreover the example of application of this model in tooth contact analysis was presented.

11

Authors: Piotr POŁOWNIAK

The paper presents methods of modelling the globoid worm with rectilinear profile using CATIA system. The methods of modelling of globoid surface, among others throw extending a profile accross the screw lines of globoid (Sweep), by making the surface as multi section (Multi Section Surface) are specified. Some steps by modelling the globoid surface are automated by writing macros in the CATIA system. The accuracy of the models of globoid worms obtained by different methods is presented. The capabilities of the CATIA system by modelling are presented.