Torque applicator and closed-loop test rig

摘要

The present invention relates to a closed-loop test rig (100). It comprises a motor (40), a first perpendicular-axis gear unit (10) and a second perpendicular-axis gear unit (20), identical to the first. The motor is connected to the first gear unit. One shaft (12) of the first gear unit is rigidly connected to the corresponding shaft (22) of the second gear unit. Finally, the other shaft (11) of the first gear unit is connected to the corresponding shaft (21) of the second gear unit by means of a torque applicator (30) of the invention. The torque applicator of the invention is adapted to impart relative rotation between a first drive shaft (11) and a second drive shaft (21) in mutual coaxial relation. The torque applicator has a first flange (110) coaxial with the first shaft 11 and a second flange (210) coaxial with the second shaft (31), and a plurality of linear actuators (31). Each of the linear actuators has a first end (311) and a second end (312) and is adapted to impart a linear displacement of the first and the second ends toward or away from each other. The first ends are linked to the first flange and the second ends are linked to the second flange. The torque applicator further comprises a plurality of feed lines (32) adapted to feed the linear actuators. The feed lines are integral with one of said shafts and have accesses (320) adapted to ensure feeding during rotation of the shaft.