B - Operations – Transporting – 61 – C
Patent
B - Operations, Transporting
61
C
B61C 15/10 (2006.01)
Patent
CA 2572661
The invention relates to an automatic, variable-flow sanding device for rail motor vehicles. One of the recurring problems associated with rail transport is low wheel/rail adhesion which causes wheelslip under certain running conditions. The invention relates to a device which can be used to discharge a sufficient, controlled quantity of sand onto the rails and in front of the drive wheels in order to prevent wheelslip, while the rails continue to be shunted by the axles. The device consists of a mechanically-welded assembly comprising a built-in pneumatic flow amplifier (15) which is submerged in the sand contained in the sand box (3) and which is supplied with variable-pressure compressed air by means of a proportional electrovalve (146). Moreover, said proportional electrovalve is in turn controlled by a variable current that is generated by an electronic computer (150) containing a programmed, adjustable diagram which is adapted according to the characteristics of the motor vehicles comprising same.
Dispositif de sablage à débit variable automatique pour engins moteurs ferroviaires. L'un des problèmes récurrents du transport ferroviaire est la faible adhérence rouelrail qui engendre un phénomène de patinage sous certaines conditions de circulation. L'invention concerne un dispositif permettant d'éjecter du sable en quantité suffisante et contrôlée sur les rails et devant les roues motrices afin d'annihiler le phénomène de patinage tout en préservant le shuntage des rails par les essieux. Le dispositif est constitué d'un ensemble mécano soudé intégrant un amplificateur de débit pneumatique (15) immergé dans le sable contenu dans la sablière (3) et alimenté en air comprimé d'une pression variable par l'intermédiaire d'une électrovalve proportionnelle (146) qui est elle-même pilotée par un courant variable généré par un calculateur électronique (150) dans lequel est programmé un diagramme modulable, adapté selon les caractéristiques des engins moteurs dans lesquels il est intégré.
Mccarthy Tetrault Llp
Steclebout Thierry
LandOfFree
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