How to solve the problem of the arm of tension tester

The reason that pull force arm can only fall cannot rise and the solution

First of all, the fact that the pull arm can only be lowered and cannot be raised is mainly due to problems with the hydraulic drive. In the process of tension experiment, the transmission mode is the key step, and the experimental data is often obtained by the transmission device. Most of the current tensioning machines are hydraulically driven. The following is a brief introduction to the hydraulic drive of a pull-down machine:

Hydraulic transmission is a transmission method that uses liquid as a working medium to transfer energy and control, and is an emerging technology developed based on the principle of hydrostatic pressure transmission proposed by Pascal in the 17th century. Hydraulic transmission has the advantages of large specific power, smooth transmission, easy stepless speed regulation, easy automation, and large force or torque transmission. Tensile tests require accurate data. The advantages of hydraulic transmission are stability and precision, so they are widely favored by tension machines.