Martin Dub

FEM Simulation of Flank Breakage on Tooth of Gears and Experimental Photos

This article deals with the reasons for gear failure—Flank breakage on tooth of spur gears with helical and straight involute gears. Gear flank breakage can be observed on edge zone-hardened gears. The creation of flank and tooth breakage are described in this article. In the article are also described FEM simulation of this gear failure and short photo documentation from real load tests on mechanically closed stand for testing of gearing with helical gears.

Design of Experiment for Load Gear Solution in Planetary Transmission

This paper is focused on examination of teeth loading in rotating gears during standard operation and describes the applied approach and device developed. One of the closely examined items in planetary transmission testing is the gearing. The tooth load of each wheel in planetary transmission is monitored individually. In large devices, also the load across the width of the tooth is assessed by the Khβ coefficient.

Investigation of Tram Gearbox Hinge Behaviour

During the operation of trams in cities the chassis are dynamically loaded through acceleration, deceleration, passage curves and evidently by the roughness of the rail track. These added dynamic loads can significantly increase wearing of the chassis components and tram drive. The aim of this analysis is the investigation of stress state and motions of gearbox hinge. For this purpose, strain gauges and optical system Qualisys is used. Special type of strain gauges arrangement for measuring tension and bend is designed. Acquired data are processed in software Matlab and in user interface of the Qualisys software.

Torsional Characteristics Measurement of a Gearbox

Torsional characteristics of the gearboxes are important for kinematic and dynamic behaviour of the whole drive train, especially the resonances. Measured values are used as an input for further dynamic calculations. The measurement of the torsional stiffness and backlash is carried out. For this purpose the incremental rotary sensors and magnetic sensor of position are used. The results shown the behaviour of the torsional stiffness of the gearbox during loading. Furthermore the backlash of the gearbox is measured.

Experimental Analysis of Planetary Transmission Load Sharing

This paper is focused on determination of load sharing in planetary transmission during the test and usual operation. Load sharing is one of examined items in transmission. That is investigation of power flow uniformity through satellites in planetary transmission.

Experimental Analysis of Gear Loading in Planetary Transmission

This paper is focused on examination of teeth loading in rotating gears during standard operation and describes the applied approach and device developed. One of the closely examined items in planetary transmission testing is the gearing. The tooth load of each wheel in planetary transmission is monitored individually. In large devices, also the load across the width of the tooth is assessed by the Khβ coefficient.

Stress and Motion Analysis of Tram Gearbox Hinge

During working of tram the chassis are dynamically loaded through acceleration, deceleration, passage curves and evidently by the roughness of the rail track. These added dynamic loads can significantly increase wearing of the chassis components and drive. In the case of tested tram problems with bearing housing into gear box occurred. Too rigid hinge bedding can cause additional parasitic load to bearings. It is desirable to investigate its stress state during acceleration, deceleration and other common drive regimes. For this purpose, strain gauges are used. Moreover, for the verification and better description of gearbox suspension behaviour, the Qualisys system for capturing and evaluating motion is used. Acquired data are processed in software Matlab and in user interface of the Qualisys software.