英文文獻翻譯學 生 姓 名：學 院：專 業(yè) 及 班 級 ：學 號：指 導 教 師 ： 械可靠性設(shè)計方法及其研究應用程序文摘基于可靠性測試和故障數(shù)據(jù)的統(tǒng)計分析,機械可靠性設(shè)計的基本任務為工程實踐提出mathematical-mechanical模型和方法。這樣的工作狀態(tài)和生活的機械產(chǎn)品在規(guī)定的工作條件下可以在設(shè)計階段預測。機械可靠性設(shè)計的內(nèi)涵和發(fā)展闡述了通過整合現(xiàn)代mathematical-mechanical理論。一系列的理論和方法,如機械可靠性設(shè)計、動態(tài)可靠性設(shè)計、可靠性優(yōu)化設(shè)計、可靠性靈敏度設(shè)計,可靠性穩(wěn)健設(shè)計,清晰、系統(tǒng)地解釋道。基于特征的機械可靠性設(shè)計,以及研究礦井提升機的可靠性設(shè)計,以礦井提升機主軸軸承為例,論述了可靠性設(shè)計在礦井提升機中的應用設(shè)計1.介紹科學技術(shù)的不斷發(fā)展使得更大的需求的產(chǎn)品,這不僅應該更好的性能,但也更高的可靠性。在傳統(tǒng)的基礎(chǔ)上設(shè)計,可靠性設(shè)計過程材料特性等參數(shù),尺寸部分,負載,力量和其他人是隨機變量服從一定的統(tǒng)計規(guī)律。此外,數(shù)學概率模型及其分布將會根據(jù)這個設(shè)計規(guī)則形成的。由于概率和統(tǒng)計理論和強度理論公式,在一定概率部分的損害條件也得到,從而他們的維度和生活在一定的可靠性計算,既滿足操作要求,有助于優(yōu)化設(shè)計的形成參數(shù)[1],或零件的可靠性和系統(tǒng)可以根據(jù)可靠性設(shè)計總結(jié)理論。因此,上述設(shè)計彌補了傳統(tǒng)設(shè)計的缺點和減少之間的距離設(shè)計程序和生產(chǎn)實踐。2.機械產(chǎn)品可靠性優(yōu)化設(shè)計的發(fā)展現(xiàn)狀可靠性優(yōu)化設(shè)計已成為優(yōu)化設(shè)計的一個重要分支。使用的機械零件,齒輪減速器。中國的可靠性優(yōu)化設(shè)計齒輪傳動和行星齒輪傳動的可靠性優(yōu)化設(shè)計,等等的雷達,通信的可靠性問題和其他方面的機器已經(jīng)被提出中國在 1960 年代。經(jīng)濟快速發(fā)展和改革開放的 1970 年代末推進系統(tǒng)可靠性的關(guān)鍵部件的使用和民用項目。經(jīng)過多年的努力,可靠性軍事組件有兩個數(shù)量級。在 1980 年代,一群研究人員和技術(shù)的可靠性組織的骨干,建立在中國,進一步實現(xiàn)狀態(tài)可靠性工程部門已經(jīng)開始。1990 年,中國的民用和軍用產(chǎn)品質(zhì)的飛躍,許多民用電器產(chǎn)品,使得產(chǎn)品質(zhì)量的可靠性達到了一個新的高在過去的 30 年里、優(yōu)化設(shè)計方法、機械產(chǎn)品的快速發(fā)展,在過去的 30 年里、優(yōu)化設(shè)計方法、機械產(chǎn)品的快速發(fā)展,特別是在機械產(chǎn)品的可靠性設(shè)計的發(fā)展,技術(shù)和實踐機械產(chǎn)品的工程實踐。人認為機械產(chǎn)品的優(yōu)化設(shè)計可靠性是更合理的基礎(chǔ),因為在傳統(tǒng)機械產(chǎn)品比作為一個整體,性能的隨機性,在未來的工作。也就是說,一些參數(shù)的仿真機械產(chǎn)品作為隨機變量,基于可靠性的結(jié)構(gòu)優(yōu)化設(shè)計的機械產(chǎn)品可靠性要求的集成優(yōu)化設(shè)計的約束條件,或者到我們的目標函數(shù)優(yōu)化設(shè)計,即在某些可靠性指標權(quán)重,降低機械產(chǎn)品的成本,或通過調(diào)整參數(shù)的機械產(chǎn)品,或下某些情況下,機械產(chǎn)品的最大重量和成本,通過調(diào)整參數(shù),零部件的可靠性。機械產(chǎn)品的主要需求不僅是安全的,可靠的和經(jīng)濟的合理性。因此,機械產(chǎn)品的優(yōu)化設(shè)計,可以顯著提高設(shè)計的質(zhì)量和經(jīng)濟效益,機械產(chǎn)品的可靠性設(shè)計實證研究和探索的重要問題在國內(nèi)外電流。然而,由于機械產(chǎn)品可靠性分析與大量的失效形式和其他相失效模式的問題,可靠性更加困難,越來越復雜,因此,機械產(chǎn)品的可靠性設(shè)計變得更加困難。此外,最佳的解決方案算法被用來優(yōu)化設(shè)計,也進行了討論。因此,當前的可靠性和水平優(yōu)化設(shè)計機械產(chǎn)品仍在開發(fā)的早期階段[1]。3.機械產(chǎn)品可靠性高的優(yōu)點3.1.提高產(chǎn)品的使用率為了提高機械產(chǎn)品的可靠性,減少停機時間和維修人員,提高產(chǎn)品的利用率。現(xiàn)代機械產(chǎn)品的工作環(huán)境變得更加嚴重,從陸地、海洋和提供一個惡劣的環(huán)境空間的挑戰(zhàn),高可靠性,高安全性和系統(tǒng)的特征,系統(tǒng)集成和其他需要繼續(xù)很長一段時間迫使系統(tǒng)必須有一個良好的可靠性。3.2.防止事故和故障的發(fā)生提高機械產(chǎn)品的可靠性,它可以防止事故和故障,特別是在為了避免災難性事故的發(fā)生。1986 年挑戰(zhàn)者號航天飛機是美國海豹的失敗,起飛、爆炸 76 秒。造成經(jīng)濟損失 1.2 億美元?，F(xiàn)代高新技術(shù)產(chǎn)品,因其嚴格的函數(shù)。3.3.明顯的技術(shù)和經(jīng)濟效益機械可靠性和優(yōu)化設(shè)計是基于概率理論和優(yōu)化設(shè)計參與機制的方法,應用程序設(shè)計,強度,和設(shè)計、材料的選擇和生活的失效分析,和許多其他設(shè)計變量和參數(shù),并提供明確的技術(shù)。和經(jīng)濟和可靠性指數(shù)也存在,目標函數(shù)優(yōu)化模型和概率和非線性的特點,非凸非線性,需要滿足各種隨機的約束。機械產(chǎn)品設(shè)計方法,根據(jù)產(chǎn)品不僅能保證工作產(chǎn)品的可靠性和安全性,功能,重量,體積小,成本和其他參數(shù)優(yōu)化、技術(shù)和經(jīng)濟效益明顯改善。4.機械產(chǎn)品的可靠性優(yōu)化設(shè)計這提出了可靠性優(yōu)化設(shè)計問題?？煽啃詢?yōu)化設(shè)計主要考慮以下問題:1.優(yōu)化設(shè)計,可以根據(jù)不同的設(shè)計要求,選擇不同的特點函數(shù)作為目標函數(shù)。2.設(shè)計變量。結(jié)構(gòu)的總體規(guī)模和大小的組件和機械性能,等,是最常見的機械部件的設(shè)計變量,需要優(yōu)化和決賽獨立參數(shù)優(yōu)化設(shè)計過程。在設(shè)計參數(shù)的確定隨機性和分布參數(shù)應被視為反映的實際情況部分。3.約束條件。約束條件不僅可以限制在結(jié)構(gòu)參數(shù),但是也部分的功能,這需要參考常優(yōu)化設(shè)計,根據(jù)具體情況來確定。在會議上減少可靠性的要求,或在會議成本,總成本的價值的尺寸、重量和其他指標,最大可靠性。因此,可靠性設(shè)計機械產(chǎn)品可分為兩種類型的最優(yōu)可靠性的數(shù)學模型設(shè)計?？煽啃宰鳛槟繕撕瘮?shù)。可靠性作為約束條件5.機械零件的設(shè)計特點因為壓力可以支持部分和材料的強度但隨機不確定值變量和不連續(xù)性,分布函數(shù)是數(shù)學中考慮。這是因為負載,強度、尺寸和操作 alternativeness 的特性和統(tǒng)計特性[2],需要,因此概率和統(tǒng)計理論來分析和解決這個問題。5.1.定量描述產(chǎn)品的失效概率和可靠性可以做到的眾所周知,設(shè)計的產(chǎn)品有一定的失敗概率,不能高于容許值中規(guī)定的技術(shù)文件。然而,可靠性設(shè)計可以提供產(chǎn)品的失效概率和可靠性定量。5.2.可以選擇各種可靠性指標傳統(tǒng)的可靠性設(shè)計只有一個評價指標,即安全系數(shù)。通過相反,可靠性設(shè)計提供了各種和根據(jù)具體情況適當?shù)乃饕龑τ诓煌漠a(chǎn)品,如失效概率、可靠性,沒有失敗的平均工作時間,firstfailure 駕駛英里(車輛)、可維護性、可用性等等。5.3.環(huán)境的影響考慮在內(nèi)由于很大的影響在壓力下面的環(huán)境因素如溫度、影響,地震、防潮、霧、侵蝕、灰塵、磨損,可靠性大大影響結(jié)果。,因此考慮到環(huán)境能更好地反映零件的實際操作6.機械產(chǎn)品的可靠性設(shè)計原則比起電動產(chǎn)品,機械產(chǎn)品有自己的特點和方法設(shè)計和分析?？傊?機械產(chǎn)品的可靠性設(shè)計應堅持的原則(3、4),如下所示:6.1.可靠性設(shè)計與傳統(tǒng)設(shè)計的結(jié)合傳統(tǒng)的安全系數(shù)法直觀,簡單,容易掌握,一個小工作負載可以保證機械零件的可靠性在大多數(shù)情況下。但目前是非常很難進行傳統(tǒng)的機械產(chǎn)品可靠性設(shè)計在特殊的情況下。由于這個原因,它似乎是合理的和必要的改進和完善傳統(tǒng)方法的幫助下概率設(shè)計。此外,可靠性概率設(shè)計旨在關(guān)鍵部分可以逐步進行6.2.質(zhì)量和數(shù)量設(shè)計的集成數(shù)量設(shè)計指的是數(shù)量分析和計算的可靠性,但它不能解決所有問題與可靠性有關(guān)。更重要的是,在某些時候,它是不合適的,甚至是不可能的為可靠性定量闡述了。從而需要集成的質(zhì)量和可靠性數(shù)量。至于部分的質(zhì)量要求和難以使數(shù)量計算,它更合理有效的進行質(zhì)量設(shè)計。實踐證明,設(shè)計質(zhì)量扮演著一個很重要的角色,保證和提高機械產(chǎn)品的可靠性。,因此在可靠性設(shè)計的過程中,應該綜合設(shè)計質(zhì)量和數(shù)量。6.3.并聯(lián)機械可靠性和耐用性在廣泛的意義上,機械產(chǎn)品的可靠性包括可靠性和耐用性。因此,相應的機械可靠性設(shè)計包括上面提到的兩個。具體來說,可靠性設(shè)計是特定于偶爾的錯誤,而耐久性是特定于漸進的缺點,和他們的錯機制是不同的。6.4.并聯(lián)系統(tǒng)和零部件的可靠性考慮到機械零件的低 standarization 和普遍性程度和復雜功能狀態(tài)和結(jié)構(gòu),設(shè)計師必須做出一個全面的系統(tǒng)和部件的設(shè)計。零件強度基本保證系統(tǒng)可靠性和部分最基本單元的整體系統(tǒng)。在這種情況下,零件的設(shè)計應該添加傳統(tǒng)可靠性設(shè)計。systematicreliability 設(shè)計的目的是為了實現(xiàn)協(xié)調(diào)和優(yōu)化的技術(shù)性能,重指數(shù),系統(tǒng)的制造成本和使用壽命,提供系統(tǒng)已經(jīng)滿足了可靠性指標和實現(xiàn)預定的功能。7.可靠性設(shè)計的 Allication 礦井提升機礦井提升機的可靠性設(shè)計的關(guān)鍵是如何改變目前設(shè)備和參數(shù)有關(guān)(例如零部件的尺寸、強度、加載)通過實驗數(shù)據(jù)統(tǒng)計最后得出其分布。此外,可靠性、維度和生活服務還可以計算一個接一個。起重機減速器和主軸結(jié)構(gòu)配有滾動軸承,其壽命一個至關(guān)重要的對絞車的操作可靠性的影響。現(xiàn)在,在滾動軸承的周期時間生命的租賃可以達到甚至超過材料疲勞極限的循環(huán)基地(約 107)。這是普遍采用有限的生命設(shè)計為了整個結(jié)構(gòu)合理化,減少其維度和重量,最后充分利用材料和提高零件的承載能力。的條件這周期 is106 和可靠性為 90%(即平等的幫助下負載的動態(tài)負載評級 C 滾動軸承可以運行 106 運行,與此同時 90%的軸承不遭受疲勞點蝕故障[5])的設(shè)計和選擇執(zhí)行承載力。在前面分析的基礎(chǔ)上,滾動軸承的可靠性設(shè)計主軸結(jié)構(gòu)滾動軸承是vice-varying壓力。失敗的過程中操作的結(jié)果常規(guī)的壓力變化。由于壓力的長期影響,表面金屬倒了滾動體和內(nèi)部和外部的詳細信息。疲勞點蝕形成,也會導致疲勞失效。證明原件及設(shè)備或設(shè)備的壽命,所有的函數(shù)失敗了由于局部疲勞失效或故障,符合威布爾分布。所以是滾動軸承。失效概率F可以描述為在上面,一個 N 代表生命特征;N 周期,以 106 年為單位,為參數(shù)?？煽啃钥梢灾贫?對數(shù)后雙方的操作: 基于前面的分析,滾動軸承的額定壽命是 10 L(即失效概率可靠性為 90%時是10%)。因此,額定壽命 在上面,90 N 時指的是周期的可靠性是 90%。(3)除以(4),結(jié)果就變成: 8.結(jié)論通過研究機械可靠性設(shè)計和結(jié)合礦井提升機的結(jié)構(gòu),它提出了可靠性設(shè)計的關(guān)鍵過程的應用到礦井提升機如下。的首先是確定有關(guān)參數(shù)的統(tǒng)計數(shù)據(jù),然后建立故障數(shù)學模型,最后可以操作的可靠性設(shè)計。此外,礦井提升機的滾動軸承被認為是本研究的對象,同時軸承的疲勞壽命統(tǒng)計,軸承的生活的規(guī)則符合威布爾分布是后天習得的。接下來,根據(jù)滾動軸承的額定壽命的效果是 10 L(即周期)90%的可靠性時,軸承的壽命(循環(huán))計算根據(jù)給定的可靠性。一句話,這是極其有意義的提升時的可靠性的提高機械可靠性設(shè)計理論知識應用到礦井提升機的設(shè)計的部分。引用[1]張曉琴,莫才頌.機械部件的可靠性設(shè)計分析[J].茂名雜志College,2008.1? ?91 - 93.[2]劉偉鑫?？煽啃栽O(shè)計的機器。[M].北京:清華大學出版社,1996 年[3]孫偉,高聯(lián)華,姚新民等。機械產(chǎn)品的可靠性設(shè)計方法研究[J]。2007 年機械工業(yè)標準化 Design; Rolling Bearing1.IntroductionThe increasing development of science and technology has made greater requirements of products,which should be of not only better performance, but also higher reliability. On the basis of traditionaldesigns, the reliability design processes such parameters as material properties, dimension of parts, loads,strength and others to be random variables that comply with certain statistical law. Besides, mathematicalprobability model and its distribution will be formed according to this design rule. By virtue of probabilityand statistics theories and strength theory, the formula of probability for parts’ damage under givenconditions is also to be obtained and thereby their dimension and life under given reliability will becalculated, which both satisfies the operation requirements and helps with the formation of optimal designparameters[1], or the reliability of parts and system can be concluded according to the reliability designtheory. Therefore, the design mentioned above makes up for the disadvantages of the conventional designsand reduces the distance between design program and production practice.2.The Development Status of Reliability Optimization Design of Mechanical ProductsThe reliability-based optimization design has become an important branch of optimization design. Usedin the mechanical parts - gear, gear reducer. China has been the reliability-based optimization design ofgear transmission and the reliability-based optimization design of planetary gear transmission, etc. In thereliability of communication problem, radar, and other aspects of the machines have been put forward inChina in the 1960s. With the rapid economic development and reform and opening in the late 1970spropulsion system reliability of key components of use and civil items. After years of efforts, the reliabilityof military components has two orders of magnitude. In the 1980s, a group of researchers and technicalbackbone of the reliability of the organization, established in China, further implementation of stateministries of reliability engineering has begun. In 1990, China's civil and military products with aqualitative leap, many civil electrical products, has made such a reliability of the product quality hasreached a new high.In the past 30 years, optimization design method, the rapid development of mechanical products,especially in the development of the reliability design of mechanical products, technology and practical inengineering practice of mechanical products. People think that the optimal design of mechanical productsreliability is more reasonable basis, because in traditional mechanical products than by as a whole, theperformance of randomness, in the future work. That is to say, some parameters of the simulation ofmechanical products as random variables, in structure optimization design based on reliability, thereliability requirements of integration of mechanical products for optimization design of the constraintconditions, or into our target function optimization design, namely, in certain reliability index weight,reduce the cost of mechanical products, or by adjusting the parameters of mechanical products, or undercertain conditions, the maximum weight and cost of mechanical products by adjusting the parameters, thereliability of the parts. The main requirements of mechanical products are not only safe, reliable andeconomical rationality. Therefore, the optimization design of mechanical products, can significantlyimprove the design quality and economic benefit, the reliability design of mechanical products has becomean important problem in the empirical research and exploration in the domestic and foreign current.However, due to mechanical product reliability analysis is related to large amounts of invalidation formsand other relevant problems of failure modes, reliability more difficult, more and more complex, therefore,the reliability design of mechanical products is becoming more difficult. In addition, the optimal solutionalgorithm was used to optimize the design, is also discussed. Therefore, the current level of reliability andoptimal design of mechanical products is still in the early stages of development [1].3.The Advantages of High Reliability Mechanical Products3.1. Improve the Usage Rate of ProductTo improve the reliability of mechanical products, reduce downtime and maintenance personnel,improve product utilization. Modern machinery products work environment become more severe, andfrom the land, sea and provide a harsh environment space challenge, high reliability, high safety and thecharacteristics of the system, system integration and other needs to continue for a long time withoutforcing the system must have a good reliability.3.2.Prevent the Occurrence of Accidents and FailuresTo improve the reliability of mechanical products, it can prevent accidents and failure, especially inorder to avoid catastrophic accidents. The 1986 challenger space-shuttle is America's seal failure, aftertake-off, explosion 76 seconds. The economic loss caused by 120 million dollars. Modern high-techproduct, because its strict function.3.3.Obvious Technology and Economic BenefitsMechanical reliability and optimal design is based on probability theory and optimization designmethod, the application of participation mechanism design, strength, and the design, material selectionand life failure analysis, and many other design variables and parameters, and provide clear technology.And the economy and reliability index also exists, the objective function optimization model and thecharacteristics of probability and nonlinear, non-convex nonlinear, need to meet all kinds of randomconstraints. Mechanical product design method, according to the work product can not only ensure thereliability and safety of the product, the function, the weight, small volume, cost and other parameters areoptimized, technical and economic benefits have been markedly improved.4.Reliability Optimization Design of Mechanical ProductsThis puts forward the problem of reliability optimization design. Reliability optimization design mainlyconsiders the following questions:? With optimum design, can according to different design requirements, choose different characteristicfunction as the objective function.? Design variables. The overall size of the structure and size of components and mechanical properties,etc, are the most common design variables of mechanical components, is needed to optimize and finalindependent parameters optimized design process. In the determination of design parameters of therandomness and distribution parameters should be regarded as reflect the actual conditions of theparts.? Constraint conditions. Constraint conditions can be restrictions not only on structural parameters, butalso on a function of parts, this need refer to the conventional optimal design, according to thespecific circumstances to determine.In the meeting reduce the requirement of reliability, or in the meeting of the total cost of cost, the valueof size, weight and other indicators, the maximum reliability. Therefore, the reliability design ofmechanical products can be divided into two types of the mathematical model of optimum reliabilitydesign.? Reliability as the objective function.? Reliability as a constraint condition5.The Design Features of Mechanical Parts5.1.Stress and Strength Are Random VariablesBecause the stress that parts can support and materials’ strength are not certain values but randomvariables with discreteness, distribution function is taken into account in mathematics. It’s because loads,strength, dimension and operation have the characteristics of alternativeness and statistical property [2],and thus probability and statistics theories are needed to analyze and solve the problem.5.2.Quantitative Description of Products’ Failure Probability and Reliability Can Be DoneAs is known, the designed products have certain failure probability, which can not be above thepermissible value stated in the technical documents. However, the reliability design can provide products’failure probability and reliability quantitively5.3.Various Reliability Indexes Can Be ChosenThe traditional design has only one evaluation index for reliability, namely, safety coefficient. Bycontrast, the reliability design provides various and appropriate indexes according to the specific conditionsfor different products, such as failure probability, reliability, non–failure working time on average, firstfailuredriving miles(for vehicles), maintainability, availability and so on.5.4.The Effect of Environment Is Taken into ConsiderationOwing to the great influence on stress of the following surroundings factors such as temperature,impact, quake, moisture, mist, erosion, dust, and abrasion, reliability is considerably affected consequently.And thus taking environment into consideration can reflect parts’ actual operation better6.The Reliability Design Priciples of Mechanical ProductsCompared with electric products, mechanical products have their own characteristics and ways ofdesign and analysis. To sum up, the reliability design of mechanical products should stick to the principlesas follows [3, 4]:6.1.Combination of Reliability Design and Traditional DesignThe traditional safety coefficient method which is intuitive, simple and easy to master and has a smallworkload can ensure the reliability of mechanical parts under most circumstances. But at present it is verydifficult to carry out traditional reliability design of mechanical products in special cases. For this reason, itseems reasonable and necessary to improve and perfect the traditional method with the help of probabilitydesign. Moreover, the reliability probability design aimed to crucial parts can be gradually performed6.2.Integration of Quality and Quantity DesignQuantity design refers to the quantity analysis and calculation of reliability, but it can not solve all theproblems concerned with reliability. What’s more, at some times, it is inappropriate and even impossiblefor reliability to expound quantitively. And thereby the reliability requires the integration of the quality andquantity. As for the parts which have the quality requirements and are difficult to make quantity calculation,it is more reasonable and effective to conduct quality design. Practice has proved that the quality designplays an important role in assuring and improving the reliability of mechanical products. And thus duringthe process of reliability design, quality and quantity design should be integrated.6.3. Paralleling of Mechanical Reliability and DurabilityIn a broad sense, the reliability of mechanical products includes reliability and durability. Therefore,mechanical reliability design accordingly comprises the two mentioned above. Specifically speaking,reliability design is specific to occasional faults, while durability is specific to gradual faults, and their faultmechanism are different.6.4.Paralleling of System and Parts ReliabilityGiven that mechanical parts are of lower standarization and universality degree and have complexfunctional status and structure, the designers have to make a comprehensive design of system and parts.The parts strength is basic guarantee of systematic reliability and parts are the most basic unit of the wholesystem. In this case, parts’ design should add reliability design to the traditional one. The aim of systematicreliability design is to achieve the coordination and optimization of technical performance, weight index,manufacturing cost and service life of the system, providing that the system has satisfied the establishedreliability index and realized predetermined functions.7.The Allication of Reliability Design in Mine HoistThe key to the reliability design in mine hoist is how to change equipments at present and parametersconcerned (for instance the parts’ dimension, strength and loading) into statistics through experimental dataand finally conclude its distribution. Furthermore, the reliability, dimension and life service can also becalculated one after one.The decelerator and spindle structure in the hoist are equipped with rolling bearing, whose life span hasa vital impact on the operation reliability of the hoist. Now that the cycle times of rolling bearing duringthe lease of life can reach up to and even exceed the cycle base of material fatigue limit (about 107). It iscommon to adopt limited life design in order to rationalize the whole structure, reduce its dimension andweight, and at last make the best of materials and improve the bearing capacity of parts. On the conditionthat cycles is106and reliability is 90%(namely, with the help of equal load of dynamic load rating C, therolling bearing can run 106runs, and in the meanwhile 90% of the bearing does not suffer from fatiguepitting failure [5] )the design and choice of bearing capacity is executed.On the basis of the previous analysis, the reliability design of rolling bearing in spindle structure is tobe made.The rolling bearing stands vice-varying stress. The failure in the course of operation results from theregular changes of the stress. Because of the long-term effect of the stress, the surface metals fall downfrom both rolling body and inner and outer raceways. Fatigue pitting comes into being and also leads tofatigue failure. It is proved that the life span of the original and device or equipments, of all whosefunctions have failed due to partial fatigue failure or fault, is in line with Weibull distribution. So is that ofrolling bearing. The failure probability F can be described as:In the above, a N stands for characteristic life; N for cycles, with 106 as the unit; m for the parameter.Reliability can be formulated as:After logarithm operation on both sides:Based upon the preceding analysis, the rated life of rolling bearing is 10 L (that is, the failure probabilityis 10%) when the reliability is 90%. Thus the rated life isIn the above, 90 N refers to the cycles when the reliability is 90%.Divide (3) by (4), the result becomes:8.ConclusionThrough the study on mechanical reliability design and combination with the structure of mine hoist, itis proposed that the crucial procedure of reliability design’s application into mine hoist is as follows. Thefirst is to ascertain the statistics of the relevant parameters, then to set up the failure mathematical model,and finally the reliability design can be operated. Besides, the rolling bearing of mine hoist is regarded asthe object of this study, meanwhile bearing’s fatigue life as statistics, from which the rule that bearing’s lifeaccords with Weibull distribution is learned. Next, based on the result that the rated life of rooling bearingis 10 L (that is cycle) when the reliability is 90%, the bearing’s life (cycle) is calculated according to thegiven reliability. In a word, it is extremely meaningful for the improvement of hoist’s reliability when thetheoretical knowledge about mechanical reliability design is applied into the design of mine hoist’ parts.References[1] Zhang Xiaoqin, Mo Cai Song. Reliability Design Analysis of Mechanical Components [J] Journal of MaomingCollege, 2008?1??91-93.[2] Liu Weixin. Reliability Design of Machines.[M] Beijing: Tsinghua University Press, 1996[3] Sun Wei, Gao Lianhua, Yao Xinmin et al. The Research on Reliability Design Methods of Machine Products[J].Machinery Industry Standardization &Quality, 2007?8??14-17.[4] Xiang Yizhou, Chen Ge, Ding Liyu. The Reliability Design and Trial of Machine Product[J] Jo