The invention discloses a low-temperature
distortion testing
machine which comprises a testing support, the top of the testing support is connected with a transverse plate, one side of the bottom of the transverse plate is fixedly provided with a
servo motor, the end of an output shaft of the
servo motor is in transmission connection with a first rotating shaft, a second rotating shaft is arranged in the side, away from the first rotating shaft, of the transverse plate in a penetrating mode, and the second rotating shaft is rotationally connected with the transverse plate through a bearing. According to the invention, a low-temperature environment is simulated in a heat insulation wall through
refrigeration and heating equipment, and a motor is switched on through a control box to drive the first rotating shaft, the second rotating shaft and a measurement cable to rotate, thereby achieving
distortion of the measurement cable, the precision of a torsion angle is guaranteed by employing a PLC and a
servo motor as main accessories, a large-current three-path collecting ring
copper carbon
brush holder is used, a touch screen is used as a human-computer interface, operation is convenient, the whole
test data can be stored, and therefore the
distortion performance of the measurement cable can be tested.