本文選題：雙螺桿磨漿機(jī)　切入點(diǎn)：螺桿　出處：《天津科技大學(xué)》2012年碩士論文

【摘要】：雙螺桿磨漿機(jī)是一種新型資源節(jié)約型磨漿設(shè)備,具有優(yōu)良的特性和廣闊的應(yīng)用前景。磨漿系統(tǒng)是雙螺桿磨漿機(jī)的核心部件之一,但目前通過(guò)生產(chǎn)考核發(fā)現(xiàn)螺桿芯軸易折斷、螺桿與機(jī)筒的磨損速度較快,使得雙螺桿磨漿機(jī)失效破環(huán)、停產(chǎn)檢修,從而造成磨漿成本的提高,因此有必要對(duì)雙螺桿磨漿機(jī)機(jī)筒和螺桿失效、磨損進(jìn)行研究,以提高可靠性、延長(zhǎng)使用壽命。 本文簡(jiǎn)要介紹了雙螺桿磨漿機(jī)發(fā)展?fàn)顩r以及磨漿系統(tǒng)存在的問(wèn)題,闡述了螺桿和機(jī)筒的磨損機(jī)理,綜述了雙螺桿擠出機(jī)螺桿機(jī)筒和盤磨機(jī)磨片磨損研究現(xiàn)狀以及減少磨損的方法,通過(guò)分析各種減磨的方法,根據(jù)雙螺桿磨漿機(jī)磨漿系統(tǒng)的實(shí)際設(shè)計(jì)要求,提出了減少斷軸和磨損失效的設(shè)計(jì)方案。 對(duì)雙螺桿磨漿機(jī)螺桿斷軸的原因和螺桿、機(jī)筒磨損機(jī)理的進(jìn)行了理論分析,并運(yùn)用ANSYS軟件對(duì)螺桿芯軸受力分析進(jìn)行了有限元分析和模擬,通過(guò)分析得到雙螺桿磨漿機(jī)螺桿斷軸和螺桿、機(jī)筒磨損的主要原因,并提出了避免螺桿斷軸、減少螺桿和機(jī)筒磨損的改善措施。 參考相關(guān)機(jī)械設(shè)備傳動(dòng)軸聯(lián)軸器的選擇,根據(jù)大型雙螺桿磨漿機(jī)螺桿扭矩大,中心距受限的情況,設(shè)計(jì)了考慮徑向約束的大扭矩鼓形齒聯(lián)軸器,討論了鼓形齒齒寬對(duì)齒形及加工的影響。 在考慮接觸特征的情況下,運(yùn)用ANSYS軟件對(duì)鼓形齒嚙合、螺栓聯(lián)接進(jìn)行了非線性靜力有限元分析,分析結(jié)果表明鼓形齒接觸應(yīng)力強(qiáng)度滿足要求,保證螺栓聯(lián)接強(qiáng)度有效方法是選擇高強(qiáng)度螺栓和螺母,并適當(dāng)增加聯(lián)接法蘭兩側(cè)的摩擦因數(shù)。 本文深入研究了雙螺桿磨漿機(jī)螺桿斷軸和螺桿機(jī)筒磨損的機(jī)理,研究了大型雙螺桿磨漿機(jī)專用聯(lián)軸器的設(shè)計(jì)選型,研究了考慮徑向約束的大扭矩鼓形齒聯(lián)軸器的參數(shù)設(shè)計(jì)和有限元分析。本文的工作對(duì)于改善雙螺桿磨漿機(jī)的設(shè)計(jì)、提高雙螺桿磨漿機(jī)的可靠性、延長(zhǎng)使用壽命具有重要的意義。
[Abstract]:Twin-screw mill is a new type of resource-saving pulp mill with excellent characteristics and wide application prospects.The grinding system is one of the core parts of the twin-screw mill. However, it is found that the screw core shaft is easily broken and the wear speed between the screw and the cylinder is faster, which makes the twin-screw mill fail to break the ring and stop production and maintenance.Therefore, it is necessary to study the failure and wear of twin screw grinding-machine cylinder and screw in order to improve reliability and prolong service life.This paper briefly introduces the development of twin-screw grinding-machine and the problems existing in the grinding-system, and expounds the wear mechanism of screw and cylinder.This paper summarizes the present situation of research on wear of screw cylinder and disc mill of twin-screw extruder and the methods of reducing wear. Through analyzing various ways of reducing wear, according to the actual design requirements of grinding system of twin-screw mill,The design scheme of reducing shaft break and wear failure is put forward.The causes of screw shaft breaking and the wear mechanism of screw and cylinder of twin screw grinding-mill are analyzed theoretically. The finite element analysis and simulation of screw core shaft force are carried out by using ANSYS software.The main causes of the wear of screw broken shaft and screw and cylinder of twin screw grinding-mill are obtained through analysis. The improvement measures of avoiding screw breaking shaft and reducing wear of screw and cylinder are put forward.Referring to the selection of transmission shaft coupling of related mechanical equipment, according to the large screw torque and limited center distance of large twin screw grinders, a large torque drum gear coupling considering radial constraint is designed.The influence of drum tooth width on tooth profile and machining is discussed.Considering the contact characteristics, the nonlinear static finite element analysis of drum tooth meshing and bolt connection is carried out by using ANSYS software. The results show that the contact stress intensity of drum tooth meets the requirements.The effective method to ensure bolt joint strength is to select high strength bolts and nuts and to increase the friction coefficient on both sides of the joint flange.In this paper, the wear mechanism of screw broken shaft and screw cylinder of twin screw grinding-mill is deeply studied, and the design and selection of special coupling for large twin-screw grout mill are studied.The parameter design and finite element analysis of large torque drum coupling considering radial constraints are studied.The work in this paper is of great significance for improving the design of twin-screw mill, improving the reliability of twin-screw mill and prolonging the service life.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH133.4

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