外文翻譯--舉升系統(tǒng)失效分析

附 錄 附錄 A Lifting sytem failure analysis Below a certain brand can explain a type of lift accident .Because lifting machine structure is more complicated ,e to maintenance enterprise use it frequently in work under high load ,We have to consider its damaged condition. actual use, as repeated wear and tear of fatigue damage ,So anytime possible lifting system failure . If the downturn is likely to cause maintenance personnel injured and vehicles damaged . After the failure of the lift inspection, analysis, found its existence defects in design. This product for the mechanical lifting machine, uses the pin shaft transmission, driven by shaft lifting arm motion realization Auto lift. Unless the power cut off the motor car, driven shaft lifting stop failure analysis personnel of nantong product quality supervision, inspection ZouLei can observed. To effectively guarantee the safety, auto lift should lock up the device. In order to effectively To protect the security, automotive lift Should stop the browser and the backstop. From The Brand Lift of the occurrence of several Lapsed since the incident, the principal, Vice-nut at the same time lead to wear and tear due to strong Decreases occurred in the thread root cut Letter, which of course, and materials selection, Manufacturing quality, the use of maintenance due to Su-relevant, but imagine if Is an independent work of the backstop , And even in the absence of Vice-nut, so that The possibility of a thing you Moment of downtime in order to achieve things, it does not work independently of the stop device and the backstop , And only made use of the role of self-locking screw to prevent the decline in our care arm Know that the conditions for self-locking thread is the thread friction angle or Chaetoceros. Its an But to protect the whole body is fitted with a nut in the bottom of the main vice of the so-called Nut, through institutions linked synchronous rotation with the main nut. There is no denying that when the Lord, Vice-nut There is a certain gap between the, if nut the main event of an accident, child care Vice-nut will be on the arm and not the accidents. However, the main, the Deputy nut As the gap between the main nut and gradually reduce the wear and tear, when reduced to a Certain extent, it must be replaced with new ones of the main nut, otherwise, continue to use When the owners go, the gap between the Deputy nut completely disappear, the Lord, is Vice-nut Quality has become one, and act as security devices has been gradually Vice nut Until all the nuts to replace the main workload. At this point if an accident such as Thread occur due to wear and cut the root, see the attached map, security protection devices can play It should be the role to be sure, if the timely replacement of the main nut, can be avoided Some accidents, but not all users have the professional knowledge and Lord, the gap between the Vice-nut is not clear at a glance from the outside can, it is necessary to disassemble Therefore, the use of cars to check whether the lift should be independent Work backstop safety protection device, if not, be sure to strengthen the Inspection and timely replacement of drive nut to avoid accidents. If not, then, be sure to strengthening inspection and change in time transmission nut, lest produce an accident. The manufacturers character, also Should improve design. Hope so as to remind each manufacturer . 附錄 B Lifting machine main structure identification This topic is the main content of design is based on small scissors type elevator machine structure design, scissors, type elevator machine market are more mature, type very rich also. According to the size of the scissors into large scissor lifting machine (and JiaoZi mother type), and small cut (single cut) lift； According to the driving type can be divided into mechanical, electrical and hydraulic, gas to liquid driving type； According to installation forms can be divided into hiding again to install, ground installation. Because the design of lifting weight to passenger vehicles for 2t below, so adopt double hinged scissor hydraulic lift is fully comply with design concept. In order to suit the size, the foundation maintenance enterprises without excessive requirements, the flat panel installation can be put on the ground directly. Judging from the overall structure, double scissor lift hinged by lifting arm, slide device, fluctuation platform, electronically controlled hydraulic system four major part. Lifting height in reach, because of hydraulic system of choice of piston rod is greater than the actual lifting travel to travel, so must needed to block block to slide place to limit its lifting height. Because of this design uses slope type FangDeng to make cars rise to lifting position, the application of galvanism use safety higher hydraulic system to control, so avoid plus hydraulic cylinder with self-locking device, namely cost savings have safe operation. Double articulated lift two groups of identical lifting arm agencies on both sides, respectively, between a pulley about put in. By lifting machine electric control system, by hydraulic system output hydraulic oil as driving, driving the piston rod telescopic lifting arm while both sides rise and fall, the lock. Lift side for the lower welding beam and floor in the fixed hinge bearing, by lifting arm in hinge pin connections on fixed bearings. Another side to the lower Angle, within the slide block lifting arm through the axes and pulley connection. The hydraulic cylinder by lifting transverse axis to lift the whole platform, lifting arm to fixed hinge on one side for the fulcrum, pulley bearings inside or outside to slide, make lift up and down, when reaching an appropriate position, use the lifting control platform and block block the lock. Scissors type elevator machine operation is convenient, simple structure and easy maintenance, cover an area of an area small, suitable for most cars maintenance, and safe and reliable. 附錄 C 舉升系統(tǒng)失效分析 下面是 某個(gè)品牌 的一次 事故 分析 ,因?yàn)槠鹬貦C(jī)械結(jié)構(gòu)比較復(fù)雜 ,維護(hù)企業(yè)使用它經(jīng)常在工作在高負(fù)載時(shí) ,我們必須考慮其受損 的情況 .實(shí)際使用 中 因?yàn)橹貜?fù)的磨損及疲勞損傷 ,所以隨時(shí) 可能 發(fā)生舉升 系統(tǒng)的 損壞事故 。如果 其意外下滑 可能引起維修人員受傷 ,車輛 的 受損。 舉升 失敗后 ,對(duì)其 檢測(cè)、分析 ,發(fā)現(xiàn)其存在設(shè)計(jì)上的缺陷。本產(chǎn)品為機(jī)械 舉 升機(jī) ,采用銷軸傳動(dòng) ,通過 驅(qū)動(dòng) 橫 軸 來使舉 升臂運(yùn)動(dòng)實(shí)現(xiàn)汽車舉升。除非切斷汽車電源 ， 驅(qū)動(dòng)軸的失效分析人員 來自 南通產(chǎn)品質(zhì)量監(jiān)督檢驗(yàn) 站的鄒雷才 可以觀察到。為了 有效地保障安全 ,汽車舉升機(jī)應(yīng)該 有 止裝置。為了有效地保護(hù)安全 該品牌的舉升機(jī)發(fā)生的數(shù)起失效事故看 , 都是主、副螺母同時(shí)因磨損導(dǎo)致強(qiáng)度降低發(fā)生了螺紋根切所致 , 這固然與材料的選用、制造質(zhì)量、使用維護(hù)等因素有關(guān) , 但設(shè)想一下若是 具有獨(dú)立工作的逆止器 , 即使沒有副螺母 , 這樣的事有可能發(fā)生嗎轉(zhuǎn)動(dòng)以實(shí)現(xiàn)停機(jī)外 , 該機(jī)并無獨(dú)立工作的停止器與逆止器 , 只是利用了螺紋的自鎖作用來防止托臂下滑的我們知道 , 螺紋自鎖的條件是螺紋的升角毛摩擦角。它的安全保護(hù)機(jī)構(gòu)不過是了一只裝在主螺母下方的所謂的副螺母 , 通過連動(dòng)機(jī)構(gòu)與主螺母同步轉(zhuǎn)動(dòng)。不可否認(rèn) , 當(dāng)主、副螺母之間存在一定的間隙時(shí) , 若主螺母發(fā)生意外時(shí) , 托臂將落在副螺母上而不致于發(fā)生意外。但是 , 主、副螺母之間的間隙隨著主螺母的磨損而逐漸減少 , 當(dāng)減少到一定程度時(shí) , 就必須更換新的主螺母 , 不然的 話 , 繼續(xù)使用下去而當(dāng)主、副螺母間的間隙完全消失時(shí) , 主、副螺母實(shí)質(zhì)上已成為一體了 , 充當(dāng)安全保護(hù)裝置的副螺母已逐漸直至全部接替了主螺母的工作負(fù)荷。此時(shí)若發(fā)生意外如螺紋因磨損而發(fā)生根切 , 安全保護(hù)裝置能否起到應(yīng)有的作用，誠(chéng)然若能及時(shí)發(fā)現(xiàn)并更換主螺母 , 可以避免一些意外事故的發(fā)生 , 但使用者并非都具有專業(yè)知識(shí) , 而且主、副螺母之間的間隙并非從外面可以一目了然 , 要拆開它后才可以發(fā)現(xiàn)。因此使用汽車舉升機(jī)時(shí)應(yīng)檢查一下是否具有獨(dú)立工作的安全保護(hù)裝置逆止器 , 如若沒有的話 , 務(wù)必加強(qiáng)檢查 , 及時(shí)更換傳動(dòng)螺母 , 以免發(fā) 生意外。對(duì)廠家而言 , 也應(yīng)改進(jìn)設(shè)計(jì) 。如果不是 ,那么一定要加強(qiáng)檢查