Constant tension device for large-opening model test of river-to-sea ship

The invention relates to the technical field of ship and ocean engineering professional ship models, in particular to a constant tension device for large-opening model test of a river-to-sea ship. Theconstant tension device for large-opening model test of the river-to-sea ship comprises a pressure plate, a transitional panel, a sliding loading shaft, a loading shaft slide groove, a steel wire rope, a tension sensor, an electric motor sliding plate, an electric motor, a supporting platform, an electric motor slide groove, a rectangular connecting plate, a U-shaped connecting plate, a controller and a tension balancing device. According to the constant tension device for the large-opening model test of the river-to-sea ship, the load simulation of outboard water pressure is increased in themodel test by analyzing the characteristic of a wide and flat ship model of the river-to-sea ship and a data signal of the tension sensor is monitored to adjust the torque, output by the motor, in real time by using a control