YD-D Type Electro-Hydraulic Proportional Servo Test Bench

Overview:

Hydraulic electro-hydraulic proportional servo control technology is a new type of hydraulic control technology that has developed with the advancement and application of hydraulic transmission technology. Its control accuracy and responsiveness are significantly higher than those of conventional hydraulic transmission, and it is widely used in modern industrial production. In the experimental teaching phase of hydraulic technology, the static and dynamic performance tests of the servo valve enable students to intuitively understand the performance and main parameters of the core components of the servo system. Our unit's designed and developed YD-D type electro-hydraulic servo test bench can meet the requirements of experimental teaching and scientific research and development in colleges and universities and vocational colleges. It can also add new experimental projects after being upgraded according to the actual needs on-site, featuring good scalability. This experiment is divided into two parts: one is the servo valve section, and the other is the loop experiment section.

Experimental Content:

Master basic experimental skills, further understand the applications of mechatronics technology and Computer-Aided Testing (CAT), enhancing students' testing skills and hands-on abilities. Gain insights into the static and dynamic characteristics of electro-hydraulic servo valves, and master the experimental analysis methods for their performance testing. Understand the response characteristics of the electro-hydraulic servo valve-controlled hydraulic cylinder system (open-loop, closed-loop) under sine and step inputs, deepening understanding of feedback control.

Laboratory Bench Composition: The laboratory bench is composed of several parts including the experimental workbench, hydraulic pump station, common hydraulic components, electrical control unit, servo testing section, and data collection system.

(1) Laboratory Workbench

The laboratory workbench is composed of a metal plate main body and an aluminum material operating panel. It allows for convenient and flexible installation of hydraulic components and connection of experimental circuits.

(2) Hydraulic Pump Station

The system provides a dual-pump set with rated working pressure: 25Mpa, 7Mpa

Electric motors—Pump units (2 sets)

Variable plunger pump - motor

Variable plunger pump: Single-acting, nominal displacement 17.8ml, rated pressure 25MPa

Motor: 3-phase AC voltage, 1450 rpm

Variable Vane Pump - Motor

Variable impeller pump: Rated pressure 7 Mpa, nominal displacement 11 ml/r

Motor: 3-phase AC voltage, 1450 rpm

Technical Specifications:

1. Utilizing a data collection system for experimental data acquisition and analysis processing

2. Static flow measurement accuracy <2%, dynamic flow measurement bandwidth >100Hz, pressure measurement accuracy <2%, pressure measurement bandwidth >100Hz

3. Power Supply: 24VDC/4.5A

4. The software offers excellent openness, providing program interfaces for secondary development.

5. Pump Station Rated Flow Rate: 6.67 L/min

6. Workbench dimensions: Length x Width x Height = 2000mm x 750mm x 1850mm (packed weight approximately 300KG)