Dynamic Characteristics Research And Application Of Variable Speed Variable Pump

With the rapid development of technology, the integration between the various disciplinesbecome more and more obviously. In the conventional pure hydraulic system, theapplication of computer technology, microelectronics technology, sensor technology andother technologies become more and more frequently. The high anti-interference, highstability, high energy efficiency and high precision of these technologies, make theconventional hydraulic system rapidly improve.This paper presents the dynamic characteristics research about the system of variablespeed variable Pump. In order to build a high-precision speed control system, the main partof the system includes computer, motion control boards, servo systems and sensors. Thispaper mainly studies dynamic performance of the quantitative pump, and the whole system.By controlling the frequency of the motor to adjust the speed of the pump, thereby changingthe output flow of the quantitative pump, to meet the changing needs of different load in theengineering project. It realized the effect of changing the output flow of the pump in realtime.This paper studies the working principle and the design criteria about the system ofvariable speed variable pump; introduced the theoretical analysis, experimental research,application examples of the system; demonstrated the stability, feasibility, energy efficiencyof the program.The specific content of this paper is as follows:The first chapter, based on the domestic and foreign research results and the currentsituation in this field, by coMParative study the way of oil supply about the existinghydraulic pump, proposed the project about the system of variable speed variable pump andits important research significance;The second chapter, proposed the overall program of this paper and the accuracy of theexperimental platform, provide a theoretical basis for the theoretical analysis and experimental study of the following;The third chapter, by applying the principle of the similarity between the electric andhydraulic system established the mathematical model of the system of variable speed viablepump, by using Simulink software to carry on the simulated analysis of the establishedmathematical model, from the level of theory, demonstrated the feasibility and stability ofthe overall program in this paper;The fourth chapter, according to the theoretical analysis of previous chapters designedand lapped the hydraulic experimental platform including two aspects of electric andhydraulic system of this chapter, and produced the software design of this program aboutspeed regulation system in detail;The fifth chapter, based on the hydraulic experimental platform in Chapter IV designingthe content of the experiment. The experiments included, under speed ramp input andsinusoidal input, the fluctuant situations of pressure and flow on pump discharge. Throughthe contrastive analysis of the theoretical curve with the experimental curve, verified thatthe scheme is feasible in a certain range;The sixth chapter, introduced the application of the system on the pressure shear machine,discussed the characteristics of the application of the program in detail from the technicalprinciple, hydraulic system and dynamic performance, among them the most significant isenergy efficiency;The seventh chapter, according to the contents of this paper research and conclusionsmake the summary and prospects.