Micro controlled electro-hydraulic servo universal testing machine

Product: Micro controlled electro-hydraulic servo universal testing machine

Specifications: 600kN, 1000kN

Model: EY65.605-G, EY65.106-G

Purpose: This testing machine adopts a digital closed-loop control system, which can achieve the requirements of three closed-loop control of load, displacement, and deformation. The control modes can be freely combined and smoothly switched.

The important control component in the control system of the micro controlled electro-hydraulic servo universal testing machine is the electro-hydraulic servo valve, which plays a role in electro-hydraulic conversion and power amplification in the system. Specifically, during system operation, it directly receives electrical signals transmitted by the system and converts them into proportional signals with corresponding polarity that can control the load flow or load pressure of the electro-hydraulic servo valve, thereby enabling the system to output a large hydraulic power to drive the corresponding actuator. The performance and reliability of electro-hydraulic servo valves will directly affect the performance and reliability of the system, and are key components that attract attention in electro-hydraulic servo control systems.

The micro controlled electro-hydraulic servo universal testing machine keeps the upper and lower crossbeams fixed during operation. The high-pressure oil provided by the oil pump enters the action cylinder in an appropriate amount through the electro-hydraulic servo, pushing the piston to move and loading the specimen.

The opening of the servo valve of the micro controlled electro-hydraulic servo universal testing machine is controlled by the input information of the servo control amplifier, so the high-pressure oil is controlled by the control command to enter the oil cylinder. The oil pressure drives the piston to cut the sample, and the load value is sensed by the load sensor. After being amplified by the load amplifier, it is fed back as output information to the servo control amplifier. Compared with the input signal, if there is a difference, the servo control amplifier controls the servo to change the oil inlet condition, so that the output and input information are consistent. This type of output information also participates in control, and the control method is called closed-loop control It is the control feature of electronic universal testing machine and electric concentration servo testing machine. It can not only control the load in a closed-loop manner, but also control the deformation and displacement in a closed-loop manner. It is different from the control method that is basically independent of the driving system and working conditions. This closed-loop control method, which constantly compares output and input information, has a high degree of manuscript control.