本文關(guān)鍵詞：變螺距螺母防松性能分析及優(yōu)化設(shè)計　出處：《東北大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 螺紋聯(lián)接 變螺距螺紋 防松性能 優(yōu)化設(shè)計

【摘要】：任何一部機(jī)械結(jié)構(gòu)都是由許多零部件以一定的方式聯(lián)接而成的,螺紋聯(lián)接便是最常用的一種聯(lián)接方式。在以高速、精密、重載為重要發(fā)展標(biāo)志之一的現(xiàn)代機(jī)械中,螺紋聯(lián)接件的松動、松脫將造成設(shè)備工作可靠性降低。螺紋聯(lián)接一旦失效,將造成嚴(yán)重的后果。傳統(tǒng)的螺紋聯(lián)接方法其中有些固然可靠,但結(jié)構(gòu)有時很復(fù)雜,或者是重復(fù)使用性不好,防松性能不可靠,經(jīng)不起高速運(yùn)轉(zhuǎn)、強(qiáng)烈振動的沖擊。為了有效地解決螺紋聯(lián)接的松動、松脫和斷裂問題,國外的科學(xué)家提出了一種新型的螺母——變螺距螺母。 根據(jù)螺紋出現(xiàn)松動的原因,得知螺母的防松性能主要取決于螺紋牙的受力與變形。通過改變螺母的螺距,能夠改善螺紋牙的受力分布與變形,可以提高螺母的防松性能。本文在分析普通螺紋聯(lián)接中螺栓、螺母、螺紋牙受力與彈性變形的基礎(chǔ)上,從理論上分析了變螺距螺母的防松原理。與傳統(tǒng)的普通螺紋結(jié)構(gòu)相比,變螺距螺紋結(jié)構(gòu)能夠改善螺紋間載荷分布不均的現(xiàn)象,減小螺紋牙間的變形量,從而提高防松性能�；贏NSYS Workbench有限元分析軟件,論文對變螺距螺母的防松性能進(jìn)一步研究。分別分析變螺距螺母與標(biāo)準(zhǔn)螺母的螺紋牙的應(yīng)力分布、變形分布、剩余預(yù)緊力與嚙合螺紋間微滑移的變化趨勢等因素,定量地證明了變螺距螺母的防松性能優(yōu)于標(biāo)準(zhǔn)螺母。論文最后研究了影響變螺距螺母防松性能的因素,利用APDL參數(shù)化語言,對變螺距螺母的螺距參數(shù)進(jìn)行優(yōu)化設(shè)計,得出防松性能最優(yōu)的變螺距螺母模型。 變螺距螺母有很多優(yōu)點(diǎn)。改變螺母的螺距,提高螺紋聯(lián)接的防松性能,能夠改善機(jī)械設(shè)備的可靠性,對工程實(shí)踐上具有重要的意義。
[Abstract]:Any of the mechanical structure is composed of many parts which are connected together in a certain way, the threaded connection is a connection mode. The most commonly used in high speed, precision, heavy load is one of the most important symbol of the development of modern machinery, screw fasteners loose, loose will decrease the working reliability of the equipment. The thread once the connection failure, will cause serious consequences. Some traditional methods of thread connection structure is reliable, but sometimes very complex, or reuse is not good, anti loose performance is not reliable, not high speed, strong vibration impact. In order to effectively solve the screw loosening, loosening and fracture the problem, foreign scientists proposed a new type of nut - variable pitch nut.
According to the screw loosening, stress and deformation performance of anti loose nut that mainly depends on the thread. By changing the pitch of the nut, can improve the stress distribution and deformation of screw thread, can improve the anti loose nut performance. Based on the analysis of common thread connection bolt, nut, screw thread by foundation stress and elastic deformation, the anti loose principle of variable pitch nut from the theoretical analysis. Compared with the common thread of the traditional structure of the variable pitch screw thread structure can improve the load distribution uneven, reduce the deformation of the thread between, so as to improve the anti loosing performance. ANSYS based on finite element analysis software Workbench the performance of the variable pitch, pine nut to prevent further research. Analyze the thread pitch nut and nut standard stress distribution, strain distribution, the residual preload and Microslip variable meshing thread The trend and other factors, quantitatively proved superior to standard anti loose nut of variable pitch nut. This paper studies the effects of variable pitch nut anti loose performance factors, language use APDL parameters to optimize the design parameters of variable pitch pitch nut, the nut loose proof variable pitch model optimal performance.
The variable pitch nut has many advantages. Changing the pitch of the nut and improving the loosening resistance of the threaded connection can improve the reliability of the mechanical equipment, and is of great significance for engineering practice.

【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH131.3

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 宋朋舉;何耀華;吳亞菲;;雙螺母鎖緊工藝的手剎拉力穩(wěn)定性分析[J];江蘇大學(xué)學(xué)報(自然科學(xué)版);2017年03期

相關(guān)碩士學(xué)位論文 前1條

1 張敬華;工程機(jī)械螺栓防松脫的研究[D];山東大學(xué);2016年

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本文編號：1400634