Abstract
The relief valve is an important control and overload protection component of the emulsion pumping station. Its performance will affect the overall performance of the emulsion pumping station and the stable and intelligent control of the working surface. However, the research on high pressure and large flow relief valve for mine emulsion pumping station is still inadequate. In order to meet the requirements of emulsion pump station for large flow sensitivity, stability, reliability, and remote intelligent control of overflow valve, this paper uses the digital control method to establish the mathematical model of the relief valve and uses the software such as AMESim to its dynamic characteristics. The simulation results show that the structural parameters such as spool quality, damping hole, and spring stiffness have an effect on the working characteristics of the relief valve. It also provides reference for the intelligent control research of the large flow relief valve for the emulsion pumping station.
Highlights
As an important control and overload protection component of emulsion pumping station, the relief valve directly determines the quality of liquid supply and energy consumption index of the system and directly affects the working quality and service life of the pumping station system
Leng et al analyzed the dynamic characteristics of cartridge pilot relief valve by power bond graph and AMESim simulation software and obtained the influence of main structural parameters on its dynamic performance [1]
In order to improve the control accuracy and remote automatic control level of the relief valve, this paper proposes a pilot digital control scheme based on the traditional directacting spool and manually controlled relief valve, as shown in Figure 1. e working pressure of the relief valve is obtained in real time by the pressure sensor at the relief valve type inlet and is transmitted to the controller, and the actual pressure is compared with a predetermined pressure. e mathematical relationship between the linear step increment of the linear stepper motor, the preload force of the pilot valve spring, and the inlet pressure of the main valve is obtained by the controller through calculation of the mathematical model of the relief valve
Summary
As an important control and overload protection component of emulsion pumping station, the relief valve directly determines the quality of liquid supply and energy consumption index of the system and directly affects the working quality and service life of the pumping station system. Leng et al analyzed the dynamic characteristics of cartridge pilot relief valve by power bond graph and AMESim simulation software and obtained the influence of main structural parameters on its dynamic performance [1]. Dasgupta et al used the bond graph method to study the dynamic characteristics of the pilot relief valve and obtained the influence of spring, damper hole, and other structures on the response of relief valve system [4, 5]. Most of the existing research about relief valves are difficult to meet the current demand for high pressure and large flow in emulsion pumping stations In view of these problems, this study takes into account the special properties of the emulsion and designs a digital control scheme for the large flow emulsion relief valve. In view of these problems, this study takes into account the special properties of the emulsion and designs a digital control scheme for the large flow emulsion relief valve. e mathematical model and physical model are comprehensively analyzed by using software such as Matlab/Simulink and AMESim, so as to improve the control accuracy of the relief valve and the working performance of the relief valve
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