摘 要

135型雙螺桿泵是一種技術(shù)含量相當(dāng)高的容積式泵。從理論上說雙螺桿泵具有轉(zhuǎn)動平穩(wěn)、液體脈動小、壽命長等特點(diǎn)，受到了越來越多的關(guān)注。尤其是近幾年工業(yè)的快速發(fā)展，使得雙螺桿泵的應(yīng)用前景越來越好。不過雙螺桿泵的技術(shù)含量較高，而我國在這方面的研究還只是停留在初級水平，因此設(shè)計(jì)、生產(chǎn)出來的產(chǎn)品不能夠達(dá)到理想的使用效果。常常會出現(xiàn)運(yùn)動不平穩(wěn)、功率損耗大、磨損快等等的問題。這些都大大的限制了雙螺桿泵的發(fā)展和推廣。所以對雙螺桿泵的理論研究是非常必要的。
本文研究的對象是雙螺桿泵。由于其相關(guān)的研究內(nèi)容很多，含蓋的知識領(lǐng)域也比較的寬泛，因此在有限的研究期限內(nèi)很難做到面面俱到。于是在研究中主要是對雙螺桿泵做基礎(chǔ)理論的研究。重點(diǎn)研究螺桿的基本結(jié)構(gòu)形式、加工方法、工作中的受力情況等等。同時引入了一些現(xiàn)代的設(shè)計(jì)、分析方法：三維虛擬建模。
在研究過程中確立了一些基本的研究方法和基本的理論。如應(yīng)用包絡(luò)原理改進(jìn)螺桿端截面齒曲線、應(yīng)用計(jì)算機(jī)輔助設(shè)計(jì)的方法建立螺桿的虛擬模型、應(yīng)用牛頓流體理論研究螺桿中的流體壓力分布。形成了一套科學(xué)的螺桿分析過程模式。
通過這些研究工作，為螺桿泵的理論研究奠定了一個基礎(chǔ)理論系統(tǒng)和基本分析研究過程。為以后對其進(jìn)行更加深入的研究打一個鋪墊。


關(guān)鍵詞：135型雙螺桿泵，包絡(luò)原理，計(jì)算機(jī)輔助設(shè)計(jì)







ABSTRACT

　 The serials of 135 double screw pump is the positive displacement pump with high technica.Theoretically,the double screw pump received more and more attention for smooth and placidly rotating,little liquid fluctuation and large longevity.Especially for the development of the industry,the future of the double screw pump became better and better.However the design and manufacture of this product is still in the primary stage in our country for its high requests.The problems such as the unstable movement,high power loss and fast abrasion when it employed often limited the development and extend of this product in our country.It’s necessary to investigate the theory of the double screw pump.
The subject investigated in this paper is the double screw pump.For the large scale of the correlated research and the related ken,it is difficult to reach every aspect of this matter in a short time.The main aim in this paper is the basic theory of the double screw pump.And the main points are the basic fabric form of the screw, processing methods and the stress during employed.At the same time,we also introduce some modern analysis and design idea include 3-Dimension numerical simulation modeling .
During the investigations,some basic research methods and theories such as mending the end section profile of the screw arbor gear applying the envelope principle,the milling outline for the screw arbor profile cutter by kineto-synthesis method,establishing the dummy variable model of the screw arbor by the CAD method,the theory of the distributing of the fluid pressure on the screw.Thus we formed a series of scientific process pattern of screw arbor.
The systematic theory and the basic analytic process for the three screw pump that established by the investigations give directions to the future investigation.

Key words： 135 double screw pump,screw arbor,envelope principle, Computer Aided Design


目 錄

中文摘要 Ⅰ
ABSTRACT Ⅱ
1緒論 1
1.1選題的目的及意義 1
1.2 雙螺桿泵國內(nèi)外研究現(xiàn)狀 2
1.3本文研究的主要內(nèi)容及方法 6
2 雙螺桿泵的結(jié)構(gòu)分析 8
2.1雙螺桿泵的工作原理 8
2.2雙螺桿泵結(jié)構(gòu)形式 8
2.3雙螺桿泵的結(jié)構(gòu)特征 9
2.4小結(jié) 10
3雙螺桿泵的設(shè)計(jì)計(jì)算 12
4滿足第一類密封要求的螺桿的端面齒型設(shè)計(jì) 14
4.1螺桿端截面廓形曲線的確定 14
4.1.1螺旋面端面截型的理論齒曲線 14
4.1.2雙螺桿泵端面齒形方程 16
4.2 Pro/ENGINEER簡介 21
4.3 主、從螺桿的三維造型設(shè)計(jì) 22
4.4小結(jié) 27
5雙螺桿泵螺桿的力學(xué)特性分析 29
5.1螺桿的軸向力分析 29
5.2螺桿的徑向力分析 34
5.3小結(jié) 38
6結(jié)論 39
參考文獻(xiàn) 40
致謝 41