發(fā)布時(shí)間：2018-10-05 21:19

【摘要】：隨著制造業(yè)的發(fā)展，液壓技術(shù)近年來發(fā)展很快，在各個(gè)領(lǐng)域得到了廣泛的應(yīng)用，已成為現(xiàn)在傳動(dòng)與控制的主要技術(shù)手段。柱塞泵是液壓傳動(dòng)的核心元件，其性能的好壞直接影響整個(gè)液壓系統(tǒng)，因此對(duì)柱塞泵的性能要求越來越高。 本文以多種控制高壓柱塞泵為研究對(duì)象，對(duì)關(guān)鍵的摩擦副進(jìn)行研究和分析，通過Matlab軟件仿真以及ANSYS軟件進(jìn)行結(jié)構(gòu)強(qiáng)度的分析，得到了其運(yùn)動(dòng)變化曲線以及受力的情況，并且得到了配流盤的結(jié)構(gòu)應(yīng)力和應(yīng)變的云圖。目的是為了提高柱塞泵的工作性能以及延長(zhǎng)其壽命，研究的主要內(nèi)容和結(jié)果如下： （1）對(duì)國(guó)內(nèi)外的柱塞泵進(jìn)行了結(jié)構(gòu)分析，，通過對(duì)比它們的性能，確定了本文研究的柱塞泵的結(jié)構(gòu)、控制方式及相關(guān)參數(shù)（柱塞泵的工作壓力、排量及主軸轉(zhuǎn)速）。利用數(shù)學(xué)模型確定了柱塞的個(gè)數(shù)以及斜盤的傾斜角度，進(jìn)一步分析了柱塞的個(gè)數(shù)和斜盤的傾斜角度是否取值合理，結(jié)果是合理的； （2）計(jì)算了多種控制高壓柱塞泵的關(guān)鍵零部件的基本尺寸，主要為了分析其運(yùn)動(dòng)過程以及動(dòng)力學(xué)分析，利用Matlab仿真柱塞在缸體孔中運(yùn)動(dòng)位移的變化，并且計(jì)算了滑靴在斜盤上的速度是符合實(shí)際情況； （3）通過對(duì)柱塞和滑靴的受力分析建立了數(shù)學(xué)模型再次證明了柱塞的個(gè)數(shù)和傾斜角選擇合適，并且用Matlab仿真柱塞的比壓和比功的變化，其最大值在許用范圍內(nèi)。為了提高多種控制高壓柱塞泵的容積效率，進(jìn)一步研究了柱塞和缸體孔的泄漏流量與缸體孔的轉(zhuǎn)角的關(guān)系，通過Matlab仿真了其曲線圖，確定了其間隙在10~15μm范圍內(nèi)其泄漏流量是較小的，為了得到這個(gè)間隙對(duì)柱塞和缸體的加工工藝進(jìn)行了詳細(xì)的分析； （4）配流盤與缸體的摩擦副相當(dāng)重要，故對(duì)配流盤的結(jié)構(gòu)進(jìn)行了分析，并且在以往的配流盤的結(jié)構(gòu)基礎(chǔ)上進(jìn)行了結(jié)構(gòu)改進(jìn)，采用了ANSYS軟件分析配流盤有無加強(qiáng)筋的應(yīng)力和應(yīng)變情況，從等效應(yīng)力云圖可以得出有加強(qiáng)筋的結(jié)構(gòu)的應(yīng)力和應(yīng)變要小得多。結(jié)果表明改進(jìn)后的配流盤性能更好，延長(zhǎng)了其壽命； （5）多種控制方式的實(shí)現(xiàn)，利用了PPCAD繪出了其正流量、壓力切斷以及恒功率的控制方式原理圖，并且詳細(xì)的闡述了這三種控制方式是如何實(shí)現(xiàn)的； （6）此泵是建立在原有的基礎(chǔ)上進(jìn)行設(shè)計(jì)的，其最終的產(chǎn)品是否符合工作的需求，進(jìn)一步對(duì)其實(shí)驗(yàn)測(cè)試進(jìn)行研究，通過油泵的測(cè)試實(shí)驗(yàn)臺(tái)完成多種控制高壓柱塞泵的實(shí)驗(yàn)，記錄了其實(shí)驗(yàn)的結(jié)果與理論數(shù)據(jù)的對(duì)比，得出了其工作性能良好。 通過對(duì)多種控制高壓柱塞泵進(jìn)行了設(shè)計(jì)和實(shí)驗(yàn)研究，為今后的柱塞泵的發(fā)展提供了具有使用價(jià)值的參考依據(jù)。
[Abstract]:With the development of manufacturing industry, hydraulic technology has developed rapidly in recent years, and has been widely used in various fields. It has become the main technical means of transmission and control. Piston pump is the core component of hydraulic transmission, its performance directly affects the whole hydraulic system, so the performance of piston pump is more and more demanding. In this paper, a variety of controlled high pressure piston pumps are taken as the research object. The key friction pairs are studied and analyzed. Through the simulation of Matlab software and the analysis of structural strength by ANSYS software, the motion curve and the force are obtained. The structure stress and strain of the flow plate are obtained. In order to improve the working performance and prolong the life of piston pumps, the main contents and results are as follows: (1) the structure of piston pumps at home and abroad is analyzed, and their performances are compared. The structure, control mode and related parameters (working pressure, displacement and spindle speed) of the piston pump studied in this paper are determined. The number of plungers and the inclined angle of the tilting disk are determined by the mathematical model, and the number of plungers and the tilting angle of the tilting disk are further analyzed, and the results are reasonable. (2) the basic dimensions of the key parts of various control high pressure piston pumps are calculated. The main purpose of this paper is to analyze the motion process and dynamics of the piston pump, and to simulate the displacement change of the plunger in the cylinder hole by Matlab. The speed of sliding boots on the sloping disk is calculated in accordance with the actual situation. (3) by analyzing the force of plunger and sliding shoe, the mathematical model is established again to prove that the number of plungers and the selection of inclination angle are suitable. The variation of specific pressure and specific work of plunger is simulated by Matlab, and its maximum value is within the allowable range. In order to improve the volumetric efficiency of various high pressure piston pumps, the relationship between the leakage flow rate of plunger and cylinder bore and the rotation angle of cylinder bore is further studied. The curves are simulated by Matlab. It is determined that the leakage flow rate of the gap is small in the range of 10 ~ 15 渭 m. In order to obtain the clearance, the machining technology of plunger and cylinder block is analyzed in detail. (4) the friction pair between the flow distribution disk and the cylinder block is very important. Therefore, the structure of the disc is analyzed, and the structure of the disc is improved on the basis of the previous structure. The stress and strain of the plate are analyzed with ANSYS software. It can be concluded from the equivalent stress cloud diagram that the stress and strain of structures with stiffeners are much smaller. The results show that the improved disc has better performance and prolongs its life. (5) the realization of various control methods is realized, and the principle diagram of positive flow rate, pressure cut off and constant power control mode is drawn by using PPCAD. And elaborated in detail how these three control methods are realized; (6) this pump is based on the original foundation carries on the design, its final product conforms to the work demand, further carries on the research to its experiment test, The experiment of controlling high pressure piston pump is completed by the oil pump test bench. The results of the experiment are compared with the theoretical data, and the results show that the performance of the pump is good. Through the design and experimental study of many kinds of controlled high pressure piston pumps, it provides a valuable reference for the development of piston pumps in the future.
【學(xué)位授予單位】：西華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH322

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