The difference between manual hydraulic universal testing machine and electro-hydraulic servo type

ManualHydraulic universal testing machineIt is different from the electro-hydraulic servo universal test machine in both structure and test application. The following two aspects are an analysis of the two test machines:

This type of test machine is currently a kind of test machine with better performance. Because it adopts electro-hydraulic servo control technology, it can achieve closed-loop control of force, displacement, and deformation, and has good control performance. Currently, it is used in places such as metals and building materials that require constant stress, constant strain and creep testing, but due to the limitation of oil source flow, its test speed is relatively low. In order to increase the system stiffness and ensure stable operation of closed-loop control, this type of test machine has a small stroke, complex operation, and difficult to expand and configure. There are few models below 10KN, so it is not suitable for testing plastic rubber materials.

This type of test machine is the "ancestor" of the test machine family. It has a long history, is simple to use, is cheap and has a large tonnage. As the name suggests, manual hydraulics indicate that it is open-loop control, with poor performance and the operation process depends entirely on the operator's operating level. In addition, sinceUniversal testing machineThe mechanical structure and hydraulic loading principle determine its loading speed and the test stroke is small.