刮板输送机断链故障分析及防范措施外文文献翻译、中英文翻译

1、英文原文Analys is and Precautions of Chain BreakageFailure of Scraper Conveyors1. ForewordScraper conveyor the fault, the failure to Duanlian the most prominent, and deal with the time spent by the labor intensity and also the largest. Maintenance often found that the chain of serious wear, the end of a

2、 chain of non-normal damage and a pit, and other phenomena. This paper analyses the reasons for the failure occurred, by preventive measures.2. analysisAccording to statistics, in the normal production of fully mechanized coal face, scraper conveyor chain conveyor failure time about the failure of m

3、ore than 40 percent of the time. Ring linked Duanlian major fault caused by the following aspects(1) improper installation1) in the double-stranded different lengths. Under normal circumstances, single 200 kW power both in the use of double-stranded form, the new procurement scraper conveyor chain a

4、t the initial stage when there is no inconsistency in the length of the chain problem, because after the use of conveyor-bending level was advancing, through the chain A longer period of time after use,In the lateral (side-wall coal face) relative elongation of the chain, concentrated load, the heav

5、y start-up occurred when Duanlian vulnerable. When the conveyor face again the next installation, assembly chain may be confusing, if short-chain installed in the lateral and medial in the long-chain equipment, conveyor work will result in a Jinyao sprocket chain, with a loose chain Sprocket was bit

6、ten and seriously so that when the chain pull off.2) chain link seam down. For the double-stranded conveyor at the time of installation in the Central Weld legislation must be progressive, to reduce wear Weld, extended chain link life; chain link Weld and reduce the friction and wear of the plate. H

7、owever, in actual use, since the chain link wrong equipment, chain link seam down, and the frequent occurrence Duanlian fault.3) the use of short-scraper. As manufacturing quality problems or wear overrun by the use of the scraper, which, resulting in failure to stop production.4) rack deformation.

8、Sprocket and rack itself allowed the rocky ledge of 5 mm, but the actual rocky ledge in excess of this value, sprocket and chain link connection is bad, a point contact, causing ring linked with the arc of Waterloo sprocket chain of non-normal wear and tear , A pit.5) nose to install high enough. Wh

9、en the nose to install high enough, the head drum Coal Unloader not due to the net, at the end of floating coal will be linked into the groove (that is, turn coal), an increase of the conveyor running resistance and increase the chain, the chute wear, So that the chain tension increased, Duanlian.(2

10、) the use of improper maintenance1) sprocket transition wear. According to a point of order, 22 mm pitch of the biggest sprocket wear should be 6 mm (with the roundabout at sprocket chain-linked ring on the inspection and wheel above the distance), six months after the sprocket should use the nose,

11、tail Sprocket to swap. However, in actual use, because of maintenance and use of cost considerations, the sprocket wear still in use, ring linked through the chain wheel when the slide because of the relative squeeze caused friction with the arc of the chain ring wear, and linked Waterloo Ring linke

12、d connection is bad, sprocket chain and ring pitch from the chain of non-aggravated the normal wear and tear.2) chain too tight or too loose. Tight at the beginning of the chain tension adjustment is too large, impact on conveyor normal work, shorten the chain of life, exacerbated by the board in th

13、e chain and wear, especially when the scratch card scraper, so that the chain elongation. When the chain-scraper, under the nose of a scraper sprocket chain piled up in the chain to interfere with, or even Kenyao chain.3) and vertical degrees of bending gauge. Conveyor passage in the process, the le

14、vel of the overrun is often due to face rugged, vertical degrees can not be fully guaranteed. Under such circumstances, the inevitable wear ring linked the increase of chain elongation increase.4) fault encountered at the Rafah waste. As the underground working conditions constantly changing, Sheare

15、r cut off layer, cut parting cases have occurred, then the waste water mixed with a cement-like, scraper, and the chain plate in the role of friction, wear the chain of intensified, More than normal wear and tear of coal condition, Sawtooth Central, Weld life cut short, the whole chain of life decli

16、ne.5) Other damage. Electrical overload started, the running load will cause damage to link Central and Duanlian; began production in the face, cut in the bolt, metal scrap, etc. into the chute, resulting in Bie card Duanlian; tight chain method is not correct , Will cause tension gauge and Duanlian

17、(3) quality is not highCircle chain design load is about the broken scraper can withstand the tension about 10 times that in normal circumstances great safety factor, is not going to happen the Duanlian. However, due to various reasons, the ring chain (Sawtooth Central) less than the quality of stan

18、dards, resulting in the production chain in the ring in Duanlian3. Duanlian fault approach(1) off on the single-chain: a single chain on Duanlian, the first Qingdiao pile of coal on the conveyor, reversing open space will be open to the Duanlian near the tail, and then use the brake, linked resistan

19、ce (or monomer Pillar), and other tools so that the chain has some margin, with links connecting the ring will be broken;(2) off the double-stranded: in the double-stranded Duanlian, the first Qingdiao conveyor on the heap of coal, materials, winch wire rope leash on the lower part of the first chai

20、n to pull the tail direction, with open space will be reversed to open the Duanlian Near the tail, and then use the brake, linked resistance (or single prop), and other tools so that the chain has some margin, with links connecting the ring will be broken, or prepared the same length of the chain wi

21、ll Duanlian replaced;(3) off the double-stranded: in the double-stranded Duanlian, the first Qingdiao conveyor on the heap of coal, from the estimated Duanlian open multiple skylights to find Duanlian position; materials Road winch wire rope from the tail of the first lower plate Nose to the directi

22、on of penetration, with skylights, has been sent to Shengtou Duanlian, leash on the lower part of the first chain to pull the tail direction, with open space vehicles will be Duanlian Department is open to the vicinity of the tail,Recycling-oriented chain pulley will be led by the head to the tail o

23、f the board above the trough of the transition; reuse winch Shengtou will lead to decapitation above the tail, and then use the brake, linked resistance (or single prop), and other tools so that the chain Have a certain margin, with links connecting the ring will be broken, or prepared the same leng

24、th of the chain will Duanlian replacement.4. Duanlian fault preventive measures(1) strictly control the quality of the installation1) installation, they should point-components, according to the order to install loading transport, to prevent the components were insufficient to replace the old;2) all

25、 eyes on the face plate processing (in particular, will be cleared of scrap metal) to determine the nose, tail position, while the installation of the nose should be set aside or highly processed to meet the mounting height to prevent the installation of the wrong location Need to co-opt parts, or f

26、or unloading high enough damage to the chain;3) require the installation of the equipment, fastening bolts scraper, with the anti-chain, the scraper must be reworked;4) The installation process is prohibited frequent point vehicles, to avoid components, parts damaged.(2) to enhance equipment mainten

27、ance and management1) equipment in the operation to eliminate the use of unqualified chain link ring;2) the strict requirements of pushing wandering step over and over bending; Shearer asked the driver to control roof and floor to prevent a floor-level, to prevent conveyor overload;3) when the chain

28、 tight to prevent the chain too tight or too loose;4) the use of the old chain, such as the length of the chain should be tied up in pairs to use, if unable to find the same length of chain, the long chain can be disconnected from the two bundled into use, ranging from the length of the chain mix is

29、 prohibited, prohibited the use of breaking strength Not enough chain;5) of the periodic maintenance sentinel system, as required periodic replacement of the tail sprocket nose, to reduce the wear chain and sprocket.(3) improve the quality of technical workers, according to many years of experience,

30、 who after training in the installation of the work of the staff, efficient and reworked the low rate, the conveyor failure rate is also low. Therefore only strengthen training and improve the quality of technical workers, in order to prevent the occurrence of an abnormal failure to reduce the incid

31、ence of insecurity and improve the economic benefits of coal mine production.中文译文 刮板输送机断链故障分析及防范措施1. 前言刮板输送机出现的故障中,以断链故障最为突出,处理时所花费的时间及劳动强度也最大。检修经常会发现链条严重磨损、链条外端部有非正常损坏并出现凹坑等现象。本文分析故障发生的原因,提出防范措施。2.分析据统计,在正常生产的综采工作面,刮板输送机链条故障时间约占输送机总故障时间的40%以上。圆环链断链故障主要由以下几个方面引起:(1) 安装不当1) 中双链长短不一。一般情况下,单机功率200kW时均采

32、用中双链形式,新采购的刮板输送机链条在初期使用时不存在链条长短不一致的问题,使用后由于输送机呈台阶形弯曲推进,链条经过较长一段时间的使用后,处于外侧(工作面煤壁侧)的链条相对伸长,集中载荷,在重载起动时极易发生断链。当该输送机在下一个工作面再次安装使用时,链条可能混乱装配,如果短链装在外侧,长链装在内侧,输送机工作时将造成外链过紧咬链轮、内链过松被链轮咬,严重时使链条拉断。2) 链环焊缝向下。对于中双链输送机在安装时立环焊缝必须向上,以减少焊缝磨损,延长链环寿命;并可减少链环焊缝对中板的摩擦磨损。但在实际使用中,由于链环错装,链环焊缝向下,而发生频繁断链故障。3) 使用短刮板。由于制造质量问题

33、或因使用磨损超限的刮板,致使,造成故障而停止生产。4) 机架变形。链轮与机架本身允许有5mm的窜动量,但当实际窜动量超过此值,链轮与链环接触不良,出现点接触,造成圆环链圆弧段与链轮链窝的非正常磨损,出现凹坑。5) 机头安装高度不够。当机头安装高度不够时,机头滚筒由于卸煤不净,底链将浮煤拉入下槽(即回头煤) ,增加了输送机的运行阻力,增大了链条、溜槽的磨损量,使链条张力增大,断链。(2) 使用维护不当1) 链轮过渡磨损。根据规程,节距22mm的链轮最大磨损量应6mm (用圆环链平置于链轮上检查圆环链上面与轮毂的距离) ,链轮使用半年后应将机头、机尾链轮进行调换。但在实际使用中,由于考虑维修和使用

34、成本、磨损严重的链轮仍在使用,圆环链在通过链轮时由于相对滑动摩擦与挤压而造成圆环链圆弧段磨损,链窝与圆环链接触不良、链轮与圆环链节距不等加剧了链条的非正常磨损。2) 链子过紧或过松。在紧链时初张力调整过大,影响输送机正常工作,缩短了链条的使用寿命,加剧了链条与中板的磨损量,特别是当刮板被刮卡时,使外链伸长。当刮板链过松时,在机头链轮下造成刮板链条堆积,发生与链条干涉,甚至啃咬链条。3) 弯曲度和垂直度超限。输送机在推移过程中,水平度超限是经常发生的; 由于工作面凹凸不平,垂直度也不能完全保证。在这种情况下,圆环链必然磨损增大,外链伸长加大。4) 遇到断层时拉矸石。由于井下工作条件的不断变化,采煤机割断层、割夹矸情况时有发生,此时的矸石与水相混合形成水泥状,在刮板、链条与中板摩擦作用下,链条磨损加剧,磨损量超过正常运煤工况,锯齿环、焊缝寿命减短,链条整体寿命下降。5) 其它损坏。电机过负荷启动、过负荷运行将造成链接环损坏而断链;在工作面