砂浆泵阀系统设计与控制研究

发布时间：2018-06-27 09:08

本文选题：砂浆泵 + 电磁阀　；参考：《安徽工程大学》2012年硕士论文

【摘要】：随着现代工业化程度的日益提高,化工、冶炼等行业对离心泵的需求量越来越大,而砂浆泵因其优良的性能在单级单吸离心泵中占很大比例。设计性能优良的砂浆泵已成为流体机械行业研究的热点之一。本课题旨在通过先进设计方法设计出水力性能较好的砂浆泵叶轮以及重要零件,同时在确保使用要求的情况下节约原材料；设计流道性能良好的进、出口电磁阀门；编制PLC防空转控制程序避免砂浆泵发生汽蚀；进行节能调速控制研究实现砂浆泵的节能控制,从而达到节约能源、提高效率的目的。该课题为今后砂浆泵新产品的开发提供理论依据。本文从叶片型线、包角和厚度对砂浆泵性能的影响入手,根据设计要求经过分析、计算得到了最合理的叶轮设计方案,并将通过该方案设计的叶轮与利用传统方法设计的叶轮及全流域进行了ANSYS CFX数值计算,通过对计算结果的分析,验证了该方案的可行性。对砂浆泵各零部件进行布置,从而确定它们的结构及尺寸,通过计算得到泵托架和轴的受力分布,采用ANSYS中静力学分析的方法对它们进行分析,验证它们的可靠性；对砂浆泵整机进行了基于ADAMS的运动学和动力学仿真；设计了进、出口电磁阀门,并对其流道进行FLUENT数值计算,根据计算结果对流道结构进行改进,改善了阀门流道的性能；分析了五种砂浆泵在正常运行时的进口速度,编制PLC程序对系统进行防空转控制,将程序导入实验台进行模拟实验,其结果完全符合砂浆泵的防空转控制要求,从而达到利用控制手段防止泵运转过程中出现空转现象、避免过流部件因汽蚀损坏的目的；提出了利用现代控制理论设计控制器实现对泵的节能调速控制的设想,分析了泵配套电机的可调速范围,并通过分析计算得到了泵在可调速范围内几种转速下的性能参数值,建立砂浆泵系统的近似数学模型和参考模型,设计模糊控制器后运用模型参考自适应控制方法建立了SIMULINK仿真模型,通过仿真分析以及与传统PID控制的仿真结果比较,验证了节能调速控制方案的可行性。通过本次课题的研究,确定了一种水力性能较好的叶轮设计方案,并且在一定程度上减小了砂浆泵零件的尺寸,获得了性能较优良的电磁阀门,实现了砂浆泵的防空转控制及节能调速控制。
[Abstract]:With the development of modern industrialization, the demand for centrifugal pump is increasing in chemical, smelting and other industries, and mortar pump accounts for a large proportion of single-stage single-suction centrifugal pump because of its excellent performance. The design of mortar pump with excellent performance has become one of the hotspots in fluid machinery industry. The purpose of this project is to design the impeller and important parts of mortar pump with good hydraulic performance by advanced design method, at the same time, to save the raw materials under the condition of ensuring the use requirement, to design the inlet and outlet electromagnetic valves with good flow channel performance; The PLC anti-air control program is compiled to avoid cavitation of mortar pump, and energy-saving control is carried out to realize energy-saving control of mortar pump, so as to save energy and improve efficiency. This subject provides the theoretical basis for the development of new products of mortar pump in the future. This paper starts with the influence of blade profile, envelope angle and thickness on the performance of mortar pump. According to the analysis of design requirements, the most reasonable design scheme of impeller is obtained. ANSYS CFX numerical calculation is carried out on the impeller designed by this scheme and impeller designed by traditional method and the whole basin. The feasibility of the scheme is verified by the analysis of the calculated results. The components of mortar pump are arranged to determine their structure and size. The stress distribution of pump bracket and shaft is obtained by calculation. The static analysis method in ANSYS is used to analyze them to verify their reliability. The kinematics and dynamics simulation of mortar pump machine based on Adams was carried out, and the inlet and outlet electromagnetic valve was designed, and the fluent numerical calculation of its runner was carried out. According to the result of calculation, the structure of the runner was improved, and the performance of valve runner was improved. The inlet speed of five kinds of mortar pumps in normal operation is analyzed. PLC program is compiled to control the air defense of the system, and the program is introduced into the test bench for simulation experiments. The results fully meet the requirements of anti-air rotation control of mortar pumps. In order to prevent the phenomenon of idling and avoid the cavitation damage of the over-flow parts during the operation of the pump, the paper puts forward the idea of using the modern control theory to design the controller to realize the energy-saving and speed-regulating control of the pump. The range of adjustable speed of pump matching motor is analyzed, and the performance parameter values of pump under several rotational speeds are obtained through analysis and calculation, and the approximate mathematical model and reference model of mortar pump system are established. After designing the fuzzy controller, the Simulink simulation model is established by using the model reference adaptive control method. The feasibility of the energy-saving speed regulation control scheme is verified by simulation analysis and comparison with the simulation results of the traditional pid control. Through the research of this subject, a kind of impeller design scheme with better hydraulic performance is determined, and the size of mortar pump parts is reduced to a certain extent, and the electromagnetic valve with better performance is obtained. The anti-air control and energy-saving speed regulation control of mortar pump are realized.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311

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