發(fā)布時間：2018-07-22 16:59

【摘要】：行星滾柱絲杠副以其高速、重載、效率高、工作壽命長等特點,被廣泛的應(yīng)用到各種精密直線傳動及大推力傳動的場合,將逐步代替滾珠絲杠成為高精重載直線傳動的首選零部件。但是由于國內(nèi)對行星滾柱絲杠副的研制尚處于起步階段,很多基礎(chǔ)理論還不完善,本文主要針對行星滾柱絲杠副的剛度、摩擦力及效率等性能進(jìn)行分析,并對其主要影響因素進(jìn)行了探討,為產(chǎn)品結(jié)構(gòu)優(yōu)化設(shè)計及系列化研制提供了理論基礎(chǔ)。 本文首先分別采用赫茲理論和分形理論對行星滾柱絲杠副的接觸變形進(jìn)行了數(shù)學(xué)建模及數(shù)值分析計算,并對兩種理論的計算結(jié)果進(jìn)行了對比;其次在考慮絲杠的扭轉(zhuǎn)變形與軸向拉壓變形、絲杠副組件的軸向拉壓變形、接觸變形、螺紋變形等因素的情況下,對行星滾柱絲杠副的載荷分布進(jìn)行了數(shù)學(xué)建模及計算,并對其軸向靜剛度進(jìn)行了分析計算,同時對影響軸向靜剛度的各種因素如預(yù)緊力的施加方式及大小、螺旋升角、接觸角等進(jìn)行了分析;然后對行星滾柱絲杠副的摩擦力產(chǎn)生機理進(jìn)行了研究,同時對其影響因素如預(yù)緊載荷、加工制造誤差、潤滑特性等進(jìn)行了探討,最后對其效率進(jìn)行了數(shù)學(xué)建模及計算,同時對其主要影響因素如螺旋升角、接觸角等進(jìn)行了分析。 本文的創(chuàng)新點在于:應(yīng)用分形理論實現(xiàn)對行星滾柱絲杠副接觸剛度的數(shù)學(xué)建模與分析計算,并與基于赫茲理論的接觸剛度模型計算結(jié)果進(jìn)行了對比;對行星滾柱絲杠副的軸向靜剛度、摩擦力及效率分別進(jìn)行了數(shù)學(xué)建模及數(shù)值計算,并對其影響因素進(jìn)行了探討。本文的研究成果為行星滾柱絲杠副的結(jié)構(gòu)優(yōu)化分析、產(chǎn)品研制及應(yīng)用提供了一定的理論基礎(chǔ)與借鑒價值,為行星滾柱絲杠副的基礎(chǔ)理論深入研究奠定了基礎(chǔ)。
[Abstract]:The planetary roller screw pair is widely used in various precision linear transmission and large thrust transmission occasions because of its high speed, heavy load, high efficiency, long working life and so on. Will gradually replace ball screw as the first choice parts of high-precision heavy-duty linear transmission. However, due to the fact that the development of planetary roller screw is still in its infancy and many basic theories are not perfect, this paper mainly analyzes the stiffness, friction and efficiency of planetary roller screw. The main influencing factors are discussed, which provides a theoretical basis for product structure optimization design and serial development. In this paper, the contact deformation of the planetary roller screw pair is modeled and numerically analyzed by Hertz theory and fractal theory respectively, and the results of the two theories are compared. Secondly, considering the torsional deformation and axial tension deformation of the lead screw, axial tension deformation, contact deformation, thread deformation and so on, the load distribution of the planetary roller screw is modeled and calculated. The axial static stiffness is analyzed and calculated, and the factors influencing the axial static stiffness, such as the way and magnitude of pretightening force, spiral rising angle, contact angle and so on, are analyzed. Then the friction mechanism of the planetary roller screw pair is studied, and the influencing factors such as preload, manufacturing error and lubrication characteristics are discussed. Finally, the mathematical model and calculation of its efficiency are carried out. At the same time, the main influencing factors such as spiral angle and contact angle are analyzed. The innovation of this paper lies in: applying fractal theory to realize the mathematical modeling and analysis of the contact stiffness of the planetary roller screw pair, and comparing the results with the contact stiffness model based on Hertz theory; The axial static stiffness, friction force and efficiency of the planetary roller screw pair are modeled and numerically calculated, respectively, and the influencing factors are discussed. The research results of this paper provide a certain theoretical basis and reference value for the structure optimization analysis, product development and application of the planetary roller screw pair, and lay a foundation for the further study of the basic theory of the planetary roller screw pair.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH136

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