Aktiebolaget Skf

Skf Industrie Spa

Ab Skf

Silvano Sema

Roberto Moretti

Jens Graf

Matteo Genero

Mario Rossi

Maurizio Martinetti

Fabrizio Sozzi

Marc Defossez

A measurement system including: a radial external hole on a cover of a railway axle-box on the side of an edge of the cover facing towards a rolling bearing of the axle-box; a smaller axial hole made on the edge of the cover facing towards a ring of the bearing and opening in the radial hole; a cup-shaped body accommodated in the radial hole; a fork shaped spring integrally carried by a bottom wall of the cup-shaped body, projecting in front of the axial hole; a temperature probe slidingly accommodated within the axial hole and including a tubular element incorporating an electrical temperature sensor and an electric cable protruding from a first end of the tubular element accommodated within the cup-shaped body; and an abutting element removably coupled to the first end to cooperate with the spring, which pushes a second end of the probe out of the axial hole.

Rolling bearing temperature measurement system in a railway axle-box and associated method

The invention refers to a device for attachment to a rotating part () of a railway vehicle incorporating an arrangement, which is adapted, during movement of the railway vehicle, to detect and evaluate parameters related to the railway vehicle service and/or to an incipient fault state of wheel bearings () in the railway vehicle, and which device () is arranged to emit signals representative for the detected and evaluated parameters.

Device for attachment to a rotating part of a railway axle

A wheel () of a railway vehicle is associated with a vibration sensor () for supplying a vibration impulsive signal (V), indicative of the vibration of the wheel, to an electronic processing unit (E). This generates, based on the vibration signal (V), an impulsive surveillance signal (S) the instant value of which is increased in a manner correlated to the amplitude of each vibration impulse (I) and decreased in accordance with a predetermined law after each vibration impulse. The processing unit (E) compares the instant value of the surveillance signal (S) with a reference threshold value (T) and automatically generates an alarm signal (A) when the instant value of the surveillance signal (S) reaches or exceeds the reference threshold value (T).

Method and apparatus for detecting and signalling derailment conditions in a railway vehicle

A railway axle hub unit of the type including an axle box housing ( ) for supporting a bearing, is provided with a sensor body ( ) containing sensors ( ) for detecting vibration in the vertical direction and the horizontal axial direction. The sensor body is mounted onto a stationary support element ( ) rigidly secured to the bearing, preferably an annular sealing insert. The sensors perform monitoring of the operation condition of the hub unit by generating and transmitting signals indicative of the detected level of vibration to an electronic processing unit mounted on board of the railway vehicle or the train. The processing unit is capable of signalling in real time an impending failure and/or a damaged condition associated with the monitored hub unit.

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Cercenasco, Italy

Silvano Sema