Rheometer with rotary bearing comprising flexure elements

Details Rheometer with rotary bearing comprising flexure elements Rheometer with rotary bearing comprising flexure elements

G - Physics

01

N

G01N 11/16 (2006.01) F16C 17/00 (2006.01) F16C 33/00 (2006.01)

Patent

CA 2427208

A rheometer 1, an example of which is shown in figure 1, comprising an upper die 2 and a lower die 3. Extending on the vertical axis of this die arrangement is a pneumatic cylinder shaft 6, which is connected to the heater element 4 and insulator layer 5 of the upper die 2. The lower die 3 is supported by a bearing 8 which allows a lower die to rotate about an axis which is in line with that of the pneumatic cylinder 6. A lower die 3 is caused to oscillate in a rotation manner of at a vertical axis in line with the pneumatic cylinder, which is also connected to a transducer 12 which measures the force needed to keep the upper die to substantially stationary as rotation occurs. Alternatively, a lower die 2 can be have substantially stationery while a rotor head 16 holds the material to be tested. This case the forces required to maintain oscillation of the rotor head 16 in the material are tested by the transducer 12.

L'invention concerne un rhéomètre 1, dont un exemple est illustré dans la figure 1, comprenant une filière supérieure 2 et une filière inférieure 3. Un arbre de cylindre pneumatique 6 situé sur l'axe vertical de ce dispositif de filière est raccordé à l'élément de chauffage 4 et à une couche d'isolation 5 de la filière supérieure 2. La filière inférieure 3 est supportée par un roulement 8 qui permet à la filière inférieure de tourner autour d'un axe aligné sur l'axe du cylindre pneumatique 6. La filière inférieure 3 oscille de manière rotative sur un axe vertical en ligne avec le cylindre pneumatique, qui est également raccordé à un transducteur 12 qui mesure la force requise pour maintenir la filière supérieure sensiblement fixe lors de la rotation. Dans une variante, une filière inférieure 2 peut rester sensiblement fixe tandis qu'une tête de rotor 16 maintient le matériau à tester. Les forces requises pour maintenir l'oscillation de la tête de rotor 16 dans le matériau sont testées par le transducteur 12.

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