本文選題：壓電泵 + 壓電疊堆��； 參考：《南京航空航天大學(xué)》2011年碩士論文

【摘要】：近年來,作為微機(jī)械液壓系統(tǒng)的新興分支,基于壓電材料驅(qū)動的微型泵在各種領(lǐng)域得到越來越廣泛的應(yīng)用。相對于傳統(tǒng)軸向柱塞泵、齒輪泵中的驅(qū)動電機(jī)或燃油機(jī),新型的壓電材料驅(qū)動器具有更高能量質(zhì)量比,并且基于壓電材料開發(fā)的微型泵有著更加簡單的結(jié)構(gòu),且在工作中沒有運(yùn)動零部件。新型的壓電疊堆泵有望作為液壓作動系統(tǒng)的驅(qū)動源,應(yīng)用在飛機(jī)自適應(yīng)后緣結(jié)構(gòu)和無人飛行器的操作舵面上。 本文基于壓電驅(qū)動基礎(chǔ)理論,闡述了壓電疊堆驅(qū)動器作動原理和輸出特性,因其具有較大輸出位移和輸出力,提出了一種以壓電疊堆作為驅(qū)動源的壓電流體泵的設(shè)計(jì)方案,根據(jù)液壓流體力學(xué)原理,對其結(jié)構(gòu)進(jìn)行了優(yōu)化設(shè)計(jì),最后通過對比實(shí)驗(yàn)進(jìn)行了驗(yàn)證。本文主要進(jìn)行了以下幾個方面的工作: 1.闡述了壓電疊堆泵的工作原理,選用彈性振動薄膜式的容腔泵結(jié)構(gòu),設(shè)計(jì)了壓電疊堆泵的裝配形式。選用懸臂梁式金屬薄片作為被動截止閥,將閥片用螺釘旋緊于閥體上。整個結(jié)構(gòu)裝配簡單,對工藝要求較低。 2.建立了壓電疊堆泵各部分組件的準(zhǔn)靜態(tài)工作模型,該模型描述了其機(jī)械、電、流體之間的相互耦合作用。根據(jù)建立的模型,分析了壓電疊堆泵輸出流量特性與其結(jié)構(gòu)尺寸、驅(qū)動頻率及驅(qū)動電壓之間的關(guān)系。 3.設(shè)計(jì)并制作了壓電疊堆泵樣機(jī),為了提高壓電疊堆泵的輸出特性,根據(jù)液壓流體力學(xué)相關(guān)理論,對閥孔、閥片結(jié)構(gòu)部分進(jìn)行了優(yōu)化設(shè)計(jì),同時(shí)通過對比實(shí)驗(yàn)進(jìn)行了驗(yàn)證。所設(shè)計(jì)的壓電疊堆泵輸出流量可達(dá)到288.5ml/min,輸出壓力可達(dá)到68kPa,其輸出特性較目前所提出的各類壓電微泵有較大的提高。 4.利用有限元軟件分析了彈性薄膜/壓電疊堆驅(qū)動組件的固有模態(tài)和振型,分析了不同厚度彈性薄膜在最佳工作頻率振動時(shí),附加模態(tài)對泵腔內(nèi)出入流的影響作用。據(jù)此解釋了彈性薄膜厚度對壓電疊堆泵最優(yōu)工作頻率和最大輸出流量有較大影響的實(shí)驗(yàn)現(xiàn)象。
[Abstract]:In recent years, as a new branch of micromechanical hydraulic systems, micro pumps driven by piezoelectric materials are becoming more and more widely used in various fields. Relative to the traditional axial piston pumps, driving motors or fuel engines in gear pumps, new type piezoelectric actuators have higher energy quality ratio and are developed based on piezoelectric materials. The micro pump has a more simple structure and no moving parts in the work. The new type piezoelectric stack pump is expected to be the driving source of the hydraulic actuating system, which is applied to the adaptive rear edge structure of the aircraft and the operating rudder surface of the unmanned aerial vehicle.
Based on the theory of piezoelectric actuation foundation, this paper expounds the dynamic principle and output characteristics of the piezoelectric stack drive. Because of its larger output displacement and output force, a design scheme of a piezoelectric current pump with piezoelectric stack as the driving source is proposed. The structure is optimized according to the hydraulic fluid mechanics principle, and finally, the design is carried out. It has been verified by experiments.
1. the working principle of the piezoelectric stack pump is described. The structure of the flexible vibration film type cavity pump is selected and the assembly form of the piezoelectric stack pump is designed. The cantilever beam type metal sheet is used as the passive cut-off valve to screw the valve plate on the valve body. The whole structure is simple and the process is low.
2. a quasi static working model of the components of a piezoelectric stack pump is established. The model describes the interaction between the mechanical, electrical and fluid. Based on the model, the relationship between the output flow characteristics of a piezoelectric stack pump and its structure size, driving frequency and driving voltage is analyzed.
3. a piezoelectric stack pump prototype is designed and produced. In order to improve the output characteristics of the piezoelectric stack pump, the valve hole and the valve plate structure are optimized according to the theory of hydraulic fluid mechanics. The output flow of the designed piezoelectric stack pump can reach 288.5ml/min and the output pressure can reach 68kPa, The output characteristics of these piezoelectric micropumps are greatly improved.
4. the finite element software is used to analyze the inherent mode and vibration mode of the elastic thin film / piezoelectric stack drive component. The influence of the additional mode on the flow of the pump is analyzed when the optimum working frequency is vibrate. The optimum operating frequency and the maximum output flow of the elastic film thickness to the piezoelectric stack pump are explained. There is a great influence on the experiment.

【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH38

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