【摘要】：飼料混合是飼料加工工藝中的重要組成部分,混合機也是飼料行業(yè)中占有舉足輕重地位的飼料機械。其中雙軸槳葉式混合機更是由于其具有混合效率高、殘留量低、混合均勻度好、使用維修方便等特點,在國內(nèi)外飼料加工生產(chǎn)中有著廣泛的應(yīng)用。本文將從某型號雙軸槳葉式混合機的故障出發(fā),利用可靠性理論對其可靠性影響因素進行分析,進而指導(dǎo)混合機可靠性的改善。主要進行了以下研究：1.掌握雙軸槳葉式混合機結(jié)構(gòu)及工作原理,在此基礎(chǔ)上對混合機進行子系統(tǒng)劃分、故障模式劃分及故障編碼。依據(jù)收集與整理的混合機故障信息,對飼料混合機的故障模式、故障部位、故障原因進行分析,初步獲得飼料混合機的故障情況。2.依據(jù)故障信息及結(jié)構(gòu)特點建立混合機的重要度模型,并運用可靠性分析方法,確定其各子系統(tǒng)的重要度指標(biāo),從而找出飼料混合機的薄弱系統(tǒng)與關(guān)鍵故障；根據(jù)子系統(tǒng)重要度指標(biāo)設(shè)計子系統(tǒng)的可靠度分配方法,得到各個子系統(tǒng)的可靠度。3.針對關(guān)鍵部件傳動軸的運動特點,分析其力學(xué)特性,再對傳動軸進行彎扭組合測試獲得其載荷信息,繼而通過有限元分析以獲得傳動軸應(yīng)力分布情況,最終確定傳動軸失效原因。4.確定傳動軸的失效原因后,結(jié)合傳動軸上載荷信息和其力學(xué)特性,利用“應(yīng)力—強度”干涉理論對傳動軸進行可靠性改進設(shè)計：傳動軸過盈連接的可靠性設(shè)計以及傳動軸的疲勞強度可靠性設(shè)計。
[Abstract]:Feed mixing is an important part of feed processing technology, and mixer is also an important feed machinery in feed industry. Among them, the biaxial blade mixer is widely used in feed processing and production at home and abroad because of its high mixing efficiency, low residue, good mixing uniformity and convenient use and maintenance. In this paper, based on the fault of a certain type of biaxial blade mixer, the influencing factors of reliability are analyzed by using reliability theory, and then the improvement of reliability of mixer is guided. The following studies have been carried out: 1. The structure and working principle of the biaxial blade mixer are mastered, on the basis of which the subsystems, fault modes and fault coding of the mixer are divided. According to the fault information of the mixer collected and sorted out, the fault mode, fault location and fault cause of the feed mixer are analyzed, and the fault situation of the feed mixer is preliminarily obtained. 2. According to the fault information and structural characteristics, the importance model of the mixer is established, and the importance index of each subsystem is determined by using the reliability analysis method, so as to find out the weak system and key faults of the feed mixer; according to the importance index of the subsystem, the reliability distribution method of the subsystem is designed, and the reliability of each subsystem is obtained. According to the motion characteristics of the transmission shaft, the mechanical characteristics of the transmission shaft are analyzed, and then the load information of the transmission shaft is obtained by bending and torsional combination test, and then the stress distribution of the transmission shaft is obtained by finite element analysis, and the failure cause of the transmission shaft is finally determined. 4. After determining the failure cause of the transmission shaft, combined with the load information on the transmission shaft and its mechanical characteristics, the reliability design of the transmission shaft is improved by using the "stress-strength" interference theory: the reliability design of the interference connection of the transmission shaft and the fatigue strength reliability design of the transmission shaft.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S817.124

【引證文獻】

相關(guān)會議論文 前2條

1 王東鋒;汪定江;王新坤;;構(gòu)件安全疲勞壽命估算中的p-S-N曲線修正[A];第二屆中國航空學(xué)會青年科技論壇文集[C];2006年

2 謝里陽;;可靠性問題中的非完全失效和非整數(shù)階失效研究[A];面向制造業(yè)的自動化與信息化技術(shù)創(chuàng)新設(shè)計的基礎(chǔ)技術(shù)——2001年中國機械工程學(xué)會年會暨第九屆全國特種加工學(xué)術(shù)年會論文集[C];2001年

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本文編號：2504453