Variable-section towrope tensioning device

The invention relates to a tensioning device for variable-section towropes; and for a winch system with the variable-section towropes, the tensioning state of the towropes can be maintained through self-adaption of the section size change of the towropes, so that the winch system can normally perform the rope winding and unwinding operation in a safety range. No reliable and practical towrope tensioning device is applied to traditional control of the variable-section towropes in an aerial winch. The variable-section towrope tensioning device mainly consists of a mounting base, a support frame, two pairs of opposite rotating bevel gears, a pair of tensioning gears, a pair of tensioning rollers, a pair of revolving arms and a tensioning spring. The driving power is obtained from an externalinput shaft to form motions with the same rotating speed and opposite rotating directions, so that the tensioning problem of the variable-section towropes is solved. 本发明涉及种用于变截面拖缆的张紧装置，对装备变截面拖缆的绞车系统，可以自适应拖缆截面尺寸变化而保持拖缆张紧状态，保证绞