Research Of Performance Testing System Of Electro-hydraulic Servo Valve

With society improvement, the technology is also developing, automatic control is more widely applied to various areas of actual production, and continue the development of the automatic. Because the weak signals can control hydraulic servo valve converted into great demand hydraulic power and further into a mechanical force, it could be information technology and computer-controlled hydraulic drive, as well as an organic whole. Due to hydraulic components of the role of power magnification, the use of hydraulic-driven power and high adaptability, will be automated to a higher level and broader areas. In addition, since the servo valve control high precision, high response speed, smaller size, light weight, stable and reliable characters, and ability to meet analog and digital modulation of the advantages, in a variety of electro-hydraulic servo system has been an extremely wide range of applications, a system of core components, particularly by the attention.The signal is through the hydraulic oil will be converted into mechanical power conversion device that has mechanical equipment through computer-controlled electro-hydraulic servo valves, electro-hydraulic servo valve is very wide application in CNC machine tools, rotating radar antenna, navigation and mechanical components and the car has large-scale application, at the same time, its performance requirements are also increasing. This paper is also based on this study of the properties of electro-hydraulic servo valve testing system.This paper described the development of the electro-hydraulic servo valves, as well as development prospects, and in-depth study of the working principle of electro-hydraulic servo valves and mechanical and electrical signals between conversion, and will examine the internal structure of electro-hydraulic servo valve. Based on this analysis of the work of the electro-hydraulic servo valve performance parameters, and these parameters are analyzed after further analysis of the electro-hydraulic servo valve pressure and the relationship between the flow rate, flow rate signal in step with changes in the electro-hydraulic servo valve leakage, as well as its frequency response situation.The system uses a simulation of electro-hydraulic servo valve throttle load the configuration, while the measured electro-hydraulic servo valve in the input and output respectively installation of a pressure sensor to measure the import and export of electro-hydraulic servo valve differential pressure, and sensors were installed in the vicinity of a pressure gauge sensor is designed to correction at the same time facilitate a more intuitive operator observing the changes in pressure situations. Pressure sensors, flow sensors will be collected through the analog signal data acquisition cards will be PCI-1712 analog signal into a digital signal and transmit them to the PC.The whole testing system is controlled by the application of the test system software. In this paper used Delpi6 program development platform. Delpi6 is a very practical software development, a better window editing interface. Delphi is an object-oriented programming development tools, procedures and the tools to data integration to a structure known as the object. It is the man-machine interface through a window button, select frame, dialog, and other graphical user interface for operation, is the core of Delphi use visual programming and object-oriented programming methods. This method does not require the preparation of a multitude of complicated procedures to describe these elements of the man-machine interface appearance and location, and as long as the system pre-established good buttons, text box, choose to drag and drop boxes, and other objects on the screen can be. Adoption of the platform, we have developed a multi-function to test a number of pilot projects, easy to operate software.This paper studies the working principle of electro-hydraulic servo valves and internal structure, careful analysis of the work of electro-hydraulic servo valves, and based on this, proposed to test their static and dynamic performance of the pilot project, at the same time, design a servo valve used for testing equipment, and to develop a set of testing software. After repeated adjustments and tests show that the system performance and stability, the test precision meet the purpose test, and test data can be provided as a user reference.