【摘要】：擺線泵與其它類型的泵相比,具有以下優(yōu)點(diǎn):結(jié)構(gòu)緊湊,體積小,吸油性能好,脈動(dòng)率小等,且能在一些特殊工況和介質(zhì)要求的條件下工作,使其廣泛應(yīng)用于各個(gè)工業(yè)行業(yè)中。但也存在一些缺點(diǎn),內(nèi)外轉(zhuǎn)子結(jié)構(gòu)較為復(fù)雜,加工精度要求較高,往往需要專門的制造裝備進(jìn)行加工生產(chǎn),造價(jià)高,而國(guó)內(nèi)加工生產(chǎn)擺線泵的水平較低,大多以引進(jìn)外國(guó)產(chǎn)品為主,無法滿足國(guó)內(nèi)日益發(fā)展的需要。國(guó)內(nèi)學(xué)者在研究擺線泵的過程中,提出了一款結(jié)構(gòu)簡(jiǎn)單,原理新穎的擺線泵——三尖擺線泵,但對(duì)該泵的研究?jī)H僅止于原理分析和數(shù)學(xué)建模階段,還存在許多需要研究解決的問題。本文通過對(duì)擺線成形原理分析,建立了三尖擺線的數(shù)學(xué)模型。通過對(duì)三尖擺線的特性分析,驗(yàn)證了基于三尖擺線成形原理構(gòu)建三尖擺線泵的可行性,并對(duì)該泵的工作原理、工作過程進(jìn)行了研究分析,得出三尖擺線泵具有排量大,運(yùn)動(dòng)平穩(wěn)等特點(diǎn)。本文研究的重點(diǎn)是分析三尖擺線泵幾何參數(shù)變化對(duì)泵性能的影響。通過對(duì)三尖擺線型腔曲線的研究,借助MATLAB和Pro/E軟件,推導(dǎo)出了三尖擺線泵排量的計(jì)算公式,確定了幾何參數(shù)的選擇范圍,研究分析了幾何參數(shù)對(duì)泵性能的影響并與普通擺線泵的幾何排量進(jìn)行了對(duì)比分析。根據(jù)推導(dǎo)的排量計(jì)算公式,分析計(jì)算了該泵的型腔變化規(guī)律和瞬態(tài)流量。接著,對(duì)三尖擺線泵運(yùn)動(dòng),動(dòng)力學(xué)特性進(jìn)行理論分析與探討,建立了三尖擺線泵的運(yùn)動(dòng)關(guān)系和傳動(dòng)機(jī)構(gòu),使用Pro/E對(duì)各零進(jìn)行三維數(shù)字化建模、整體裝配,并分析計(jì)算泵在選定參數(shù)下的性能。最后,依據(jù)三尖擺線泵的成形原理,完成三尖擺線泵定子型腔的建模,并依據(jù)模型研究分析了三尖擺線泵復(fù)雜型腔曲面的加工方法。通過計(jì)算分析與仿真模擬,可知三尖擺線泵具有以下優(yōu)點(diǎn):由于形成該泵的動(dòng)圓直徑始終與擺線相切,對(duì)三尖擺線及動(dòng)圓直徑進(jìn)行等直徑的圓包絡(luò)后形成的泵容積效率高;同尺寸下,排量更大,脈動(dòng)更小;易加工,耐磨損;泵的結(jié)構(gòu)簡(jiǎn)單,易于密封等。所以三尖擺線泵具有一定的市場(chǎng)價(jià)值與應(yīng)用前景。
[Abstract]:Compared with other types of pumps, cycloidal pumps have the following advantages: compact structure, small volume, good oil absorption performance, low pulsation rate, and can work under some special working conditions and medium requirements, making them widely used in various industrial industries. However, there are some disadvantages, such as complicated structure of inner and outer rotors, high machining precision, high cost and high cost of special manufacturing equipment, while the level of cycloid pump in domestic processing is low. Most of the introduction of foreign products, can not meet the growing needs of domestic development. In the course of studying cycloid pump, domestic scholars put forward a simple cycloidal pump with novel principle, three-pointed cycloid pump, but the research on this pump is only in the stage of principle analysis and mathematical modeling. There are still many problems to be solved. Based on the analysis of cycloid forming principle, the mathematical model of three-pointed cycloid is established in this paper. By analyzing the characteristics of the three-pointed cycloid, the feasibility of constructing the three-pointed cycloid pump based on the three-pointed cycloid forming principle is verified. The working principle and working process of the three-pointed cycloid pump are studied and analyzed, and the results show that the three-pointed cycloidal pump has a large displacement. A smooth motion, etc. The emphasis of this paper is to analyze the influence of geometric parameters on pump performance. Through the study of the curve of the three-pointed cycloid cavity, with the help of MATLAB and Pro/E software, the calculation formula of the displacement of the three-pointed cycloidal pump is derived, and the range of geometric parameters is determined. The effect of geometric parameters on pump performance is analyzed and compared with that of cycloid pump. According to the calculation formula of displacement, the variation law of cavity and transient flow rate of the pump are analyzed and calculated. Then, the kinematic and dynamic characteristics of the three-pointed cycloid pump are analyzed and discussed theoretically, and the kinematic relationship and transmission mechanism of the three-pointed cycloidal pump are established. The three-dimensional digital modeling of each zero is carried out by using Pro/E, and the whole assembly is carried out. The performance of the pump under the selected parameters is analyzed and calculated. Finally, according to the forming principle of three-tip cycloid pump, the modeling of stator cavity of three-tip cycloid pump is completed, and the machining method of complex cavity surface of three-pointed cycloid pump is analyzed according to the model. Through calculation, analysis and simulation, it can be seen that the three-pointed cycloidal pump has the following advantages: because the dynamic circle diameter of the pump is always tangent to the cycloid, the volume efficiency of the pump formed by the equal diameter circle envelope of the three-tip cycloid and the moving circle diameter is high; With the same size, larger displacement, less pulsation; easy processing, wear resistance, simple structure of pump, easy to seal, etc. Therefore, the three-point cycloid pump has a certain market value and application prospects.
【學(xué)位授予單位】：陜西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH38

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