發(fā)布時(shí)間：2018-01-02 10:33

  本文關(guān)鍵詞：超磁致伸縮泵設(shè)計(jì)理論與實(shí)驗(yàn)研究　出處：《武漢理工大學(xué)》2013年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 超磁致伸縮材料 液壓泵 動(dòng)態(tài)模型 流場(chǎng)分析

【摘要】：超磁致伸縮材料(GMM)具有伸縮應(yīng)變大、輸出力大、能量密度高、響應(yīng)速度快和頻帶寬等優(yōu)點(diǎn),是一種新型智能材料。它在超聲換能器、精密定位、超精密加工、微型馬達(dá)和振動(dòng)主動(dòng)控制等領(lǐng)域有著廣泛的應(yīng)用。航空航天飛行器的發(fā)展,迫切需要體積小、重量輕、壓力高,且易于控制輸出流量的分布式液壓系統(tǒng)。現(xiàn)有的液壓泵難以滿足以上要求,利用智能材料的諸多優(yōu)勢(shì),研究基于智能材料的新型液壓泵及其系統(tǒng),既有開(kāi)展理論研究的必要性,也有現(xiàn)實(shí)的迫切性。論文針對(duì)超磁致伸縮材料的特性,在結(jié)構(gòu)優(yōu)化設(shè)計(jì)、流場(chǎng)分析、系統(tǒng)建模與仿真和實(shí)驗(yàn)測(cè)試等方面開(kāi)展理論和實(shí)驗(yàn)研究,旨在為超磁致伸縮泵及其液壓系統(tǒng)的發(fā)展提供設(shè)計(jì)理論支持和實(shí)驗(yàn)數(shù)據(jù)積累。 論文分析了現(xiàn)有的液壓泵和基于智能材料的新型泵的工作原理。論述了磁致伸縮效應(yīng)產(chǎn)生的機(jī)理、超磁致伸縮材料的基本特性及其應(yīng)用。對(duì)超磁致伸縮泵的國(guó)內(nèi)外研究現(xiàn)狀進(jìn)行了深入剖析,指出了開(kāi)展超磁致伸縮泵設(shè)計(jì)理論和實(shí)驗(yàn)研究的重要意義。 提出了超磁致伸縮泵的總體設(shè)計(jì)方案。通過(guò)研究和分析磁場(chǎng)強(qiáng)度在GMM棒軸線上的分布,確定了驅(qū)動(dòng)線圈設(shè)計(jì)和優(yōu)化的一般方法。通過(guò)建立系統(tǒng)的等效磁路,找到了提高電-磁-機(jī)械轉(zhuǎn)換效率的方法。使用有限元方法對(duì)超磁致伸縮泵的磁場(chǎng)進(jìn)行仿真和分析,并對(duì)磁回路結(jié)構(gòu)進(jìn)行了優(yōu)化,改善了磁場(chǎng)的均勻性。分析了預(yù)壓力機(jī)構(gòu)、泵腔設(shè)計(jì)以及單向閥設(shè)計(jì)的主要參數(shù)對(duì)輸出性能的影響。針對(duì)超磁致伸縮泵的結(jié)構(gòu)特點(diǎn),設(shè)計(jì)了靜密封和動(dòng)密封相結(jié)合的密封方式。 基于流體力學(xué)連續(xù)性方程和動(dòng)量方程,建立了超磁致伸縮泵泵腔流場(chǎng)的二維和三維模型,仿真結(jié)果顯示泵腔壓力差隨頻率增加而增大。使用有限元方法研究了不同泵腔高度下,腔內(nèi)壓力損失同活塞初始激勵(lì)速度之間的關(guān)系,分析了泵腔內(nèi)的壓力分布狀況以及造成壓力損失的原因。通過(guò)對(duì)不同進(jìn)出管路位置分布、進(jìn)出管路直徑以及進(jìn)出管路倒角形狀對(duì)泵腔內(nèi)壓力損失影響的研究,得到了優(yōu)化設(shè)計(jì)的基本方案和思路,并對(duì)流場(chǎng)結(jié)構(gòu)參數(shù)進(jìn)行了最終的優(yōu)化。采用流-固耦合的方法對(duì)不同單向閥閥片厚度下,流場(chǎng)內(nèi)流動(dòng)速度進(jìn)行仿真分析,得到了單向閥閥片厚度選取以及單向閥幾何結(jié)構(gòu)優(yōu)化的方法。對(duì)超磁致伸縮泵泵腔內(nèi)層流和紊流狀態(tài)以及泵的自吸能力進(jìn)行了討論。 超磁致伸縮泵實(shí)驗(yàn)系統(tǒng)涉及到較為復(fù)雜的多物理場(chǎng)耦合。為了深入解析電場(chǎng)、磁場(chǎng)、機(jī)械場(chǎng)和流場(chǎng)之間的耦合過(guò)程,研究了超磁致伸縮泵的輸入特性與輸出流量特性和工作油缸驅(qū)動(dòng)負(fù)載特性的關(guān)系。通過(guò)對(duì)超磁致伸縮棒、活塞、泵腔、管道和工作油缸的分段分析和建模,構(gòu)建了超磁致伸縮泵實(shí)驗(yàn)系統(tǒng)的總體靜態(tài)模型和動(dòng)態(tài)模型。其中,使用狀態(tài)空間建立了系統(tǒng)的動(dòng)態(tài)模型,并將仿真結(jié)果同實(shí)驗(yàn)數(shù)據(jù)進(jìn)行了對(duì)比分析。 基于超磁致伸縮泵的設(shè)計(jì)理論,制作了實(shí)驗(yàn)樣機(jī),搭建了實(shí)驗(yàn)測(cè)試系統(tǒng)。對(duì)超磁致伸縮泵的輸出特性進(jìn)行了測(cè)試,得到了輸出流量和輸出壓力隨電流大小和頻率變化的關(guān)系曲線。研究了無(wú)負(fù)載和不同負(fù)載情況下,工作油缸的輸出速度同電流輸入特性之間的關(guān)系。著重討論了預(yù)壓力對(duì)超磁致伸縮泵的輸出性能和系統(tǒng)輸出性能的影響。最后分析了系統(tǒng)中氣泡產(chǎn)生的原因和解決方法。
[Abstract]:The giant magnetostrictive material (GMM) with telescopic large strain, large output force, high energy density, fast response speed and wide frequency band, is a new type of smart materials. Its positioning precision in ultrasonic transducer, ultra precision machining, micro motor and active vibration control is widely used in the fields of aviation development. The space vehicle, the urgent need of small size, light weight, high pressure, and easily distributed hydraulic system to control the output flow. The existing hydraulic pump is difficult to meet the above requirements, the use of many advantages of intelligent materials, research on a new type of hydraulic pump and system based on intelligent materials, it is necessary to carry out theoretical research, but also has urgent the reality. According to the characteristics of giant magnetostrictive materials, the structure optimization design, flow analysis, system modeling and simulation and experiment were carried out theoretical and experimental research, aimed at the ultra magnetostriction The development of shrinkage pump and its hydraulic system provides design theory support and experimental data accumulation.
This paper analyzes the existing hydraulic pump and pump based on the working principle of a new type of intelligent material. This paper describes the mechanism of the magnetostrictive effect, basic characteristics and application of giant magnetostrictive materials. Deeply analyzes the present situation of the research on giant magnetostrictive pump at home and abroad, points out the significance of the telescopic pump design theory and experimental research giant.
Put forward the overall design scheme of the magnetostrictive pump. Through the research and analysis of magnetic field intensity in the GMM bar on the axis of distribution, to determine the general method of driving coil design and optimization. The equivalent magnetic circuit system, find the methods to improve the electro magneto mechanical conversion efficiency. The simulation and analysis by finite element the method of giant magnetostrictive pump magnetic field, and the magnetic circuit structure is optimized to improve the uniformity of the magnetic field. Analysis of the pre pressure mechanism, influence of pump cavity design and main parameters of one-way valve design on the output performance. According to the structural characteristics of giant magnetostrictive pump design, static sealing and dynamic sealing way seal combination.
Fluid mechanics continuity equation and momentum equation based on a two-dimensional magnetostrictive pump cavity flow field and three-dimensional model, the simulation results show that the pump cavity pressure difference increases with the increase of frequency. The finite element method is used to study the different height of pump chamber, the relationship between the cavity pressure loss with the piston initial excitation speed, analysis the pressure distribution of the pump cavity and the causes of pressure loss. According to the different distribution of import and import pipeline, pipe diameter and pipe chamfering shape on the impact of import pump chamber pressure loss, the basic method of optimum design and ideas, and the structure of the flow parameters for the final optimization. By using the method of flow the coupling of different one-way valve plate thickness, velocity of flow field simulation analysis, the one-way valve and the one-way valve sheet thickness selection and geometric structure The laminar flow and turbulent state in the pump chamber of the giant magnetostrictive pump and the self-priming capacity of the pump are discussed.
Super expansion pump experimental system relates to the magnetic multi field coupling is complex. In order to analyze the electric field, magnetic field, the coupling process between the mechanical field and flow field, the magnetostrictive characteristics of the pump input and output flow characteristics and working cylinder driving relationship. Based on the load characteristics of the giant magnetostrictive rod, piston. The pump cavity, sectional analysis and modeling of pipeline and the working cylinder, and construct the overall static model of giant magnetostrictive pump experimental system and dynamic model. Among them, the use of state space dynamic model of the system is established, and the simulation results with the experimental data were analyzed.
The design theory of magnetostrictive pump based on making the experimental prototype, experimental measurement system is built. The output characteristics of giant magnetostrictive pump was tested, the relationship curve of the output flow rate and pressure changes with the current size and frequency. On no load and different load conditions, the output speed of the working cylinder the relationship between the characteristics of input current. The paper discusses the influence of pre pressure and output performance of the output performance of the system of giant magnetostrictive pump. The analysis of the system of air bubbles and solutions.

【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH137.51
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本文編號(hào)：1368849