Method and apparatus for heating an asphalt paving screed

Details Method and apparatus for heating an asphalt paving screed Method and apparatus for heating an asphalt paving screed

E - Fixed Constructions

01

C

E01C 19/22 (2006.01)

Patent

CA 2128830

Heat exchange tubes are mounted on the upper face of the sole plates of the main screed and screed extenders on an asphalt paving machine. Hot oil is circulated through the heat exchange tubes to preheat the sole plates. The heating system for the oil includes a heat exchanger in the exhaust system of the internal combustion engine for driving the tractor of the paving machine. The heating oil is pressurized by a pump driven by a hydraulic motor supplied with pressurized oil in a second hydraulic circuit from a pump driven by the engine. This second circuit is also used to operated the vibratory mechanisms on the screeds.

Des tubes d'échange thermique sont montés sur la face supérieure de la semelle de la table vibrante principale et des rallonges de la table d'une asphalteuse. De l'huile chaude passe dans les tubes d'échange thermique afin de préréchauffer la semelle. Le système de chauffage de l'huile comprend un échangeur de chaleur logé dans le système d'échappement du moteur à combustion interne servant à l'entraînement du tracteur de l'asphalteuse. L'huile à réchauffer est pressurisée par une pompe mue par un moteur hydraulique, cette pompe est alimentée au moyen d'huile pressurisée injectée dans un deuxième circuit hydraulique actionné par le moteur. Ce deuxième circuit sert également à faire fonctionner les mécanismes de vibration de la table.

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