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摘 要
隨著汽車(chē)工業(yè)的蓬勃發(fā)展，對(duì)汽車(chē)及其零部件的安全可靠性要求也就不斷發(fā)展提高，作為汽車(chē)發(fā)動(dòng)機(jī)的心臟部件油泵，一旦出現(xiàn)故障，輕則造成汽車(chē)拋錨，重則造成車(chē)毀人亡，給人類(lèi)的生命財(cái)產(chǎn)帶來(lái)嚴(yán)重的危害。而齒輪油泵軸的斷裂又是油泵最容易失效的方式之一。近幾年來(lái)，隨著油泵凸端噴射壓力不斷提高，軸斷裂現(xiàn)象更為頻繁發(fā)生，不僅給油泵生產(chǎn)廠商帶來(lái)巨大的經(jīng)濟(jì)損失，還嚴(yán)重地?fù)p害了油泵生產(chǎn)廠商的社會(huì)信譽(yù)。因此盡快找出軸斷裂的原因并提出相應(yīng)的改進(jìn)措施迫在眉睫，具有重要的經(jīng)濟(jì)效益及社會(huì)效應(yīng)。本課題就是分析研究齒輪油泵軸斷裂失效的原因并提出了對(duì)策。
關(guān)鍵詞：軸，表面涂防,斷裂分析，網(wǎng)狀碳化物，疲勞強(qiáng)度，
Abstract
With the vigorous development of the automobile industry, the security and reliability requirements for motor vehicles and parts will continue development to improve the event of a failure, as the heart of the automotive engine parts oil pump, ranging from causing the car broke down, while causing a fatal car crashbring serious harm to human life and property. Gear oil pump shaft fracture is one of the oil pump most likely to fail. In recent years, with the end of the injection pressure of the oil pump convex and continuously improve, shaft breakage more frequently, not only bring huge economic losses to the oil pump manufacturers, also severely damaged the social reputation of the oil pump manufacturers. Therefore, as soon as possible to identify the reasons for shaft fracture and put forward the corresponding measures for improvement is imminent, with important economic and social effects. This topic is of Fracture Failure Analysis of gear oil pump shaft and proposed countermeasures.
【Key word】Axis；Surface coated with anti-axis；Fracture Analysis；Carbide network；Fatigue strength
目 錄
摘 要 I
Abstract II
目 錄 III
第1章 緒論 1
1.1本次畢業(yè)設(shè)計(jì)的意義 1
1.2油泵的發(fā)展歷史及國(guó)內(nèi)外現(xiàn)狀 2
1.3油泵系統(tǒng) 3
第2章 齒輪泵簡(jiǎn)介 5
2.1齒輪泵的工作原理 5
2.2齒輪泵的結(jié)構(gòu)特點(diǎn) 6
第3章 齒輪軸結(jié)構(gòu)分析 7
3.1齒輪泵的結(jié)構(gòu)及工況 7
3.2齒輪軸的技術(shù)條件 8
3.3小結(jié) 11
第4章 應(yīng)力分析 12
4.1強(qiáng)度校核原始條件 12
4.2齒輪軸扭矩計(jì)算 12
4.3彎矩的計(jì)算 15
4.4危險(xiǎn)截面應(yīng)力的計(jì)算 16
4.5安全系數(shù)校核 19
4.6小結(jié) 20
第5章 齒輪軸設(shè)計(jì)的改進(jìn)措施 21
5.1設(shè)計(jì)改進(jìn) 21
5.2提高冷加工質(zhì)量 21
5.3材料選用改進(jìn) 22
5.4改進(jìn)熱處理工藝 23
5.5小結(jié) 23
總 結(jié) 24
參考文獻(xiàn) 25
III