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1、膠帶跑偏緣由及訂正措施一、導(dǎo)致皮帶跑偏的主要因素1膠帶的構(gòu)造、類型和工作條件機(jī)架地基消滅不均勻沉降、風(fēng)霜雨雪的影響2345二、各種跑偏緣由及對策措施1One or more idlers immediately preceding trouble point not at right angles to the direction of belt travel. 一個或多個拖輥在前述故障點上延膠帶運動方向角度不正Advance, in the direction of belt travel, the end of the idler to which the belt has shifted
2、. Square idlers.首先延著膠帶運動方向,對膠帶跑偏的哪一側(cè)托輥進(jìn)展方形校正Conveyor frame or structure crooked. 皮帶機(jī)架彎曲Stretch string along edge to determine extent and make correction.進(jìn)展校正。One or more idler stands not centered under belt.一個或多個拖輥不正Center them.Same as above.校正拖輥Sticking idlers. 拖輥粘滯Cleanandlubricate.清理和潤滑拖輥Belt run
3、s off terminal pulley.Checkterminalpulleyassignment.Check alignments ofidlers approaching terminal pulley.Build up of material on idlers. 物料粘結(jié)在拖輥外表Clean them.Install cleaning device.清洗掉物料裝清理設(shè)備Structure not level and belt tends to shift to low side. 機(jī)架不平導(dǎo)致皮帶向較低一側(cè)偏移Level structure.調(diào)平機(jī)架2Belt not joined
4、 squarely. 皮帶接頭不正Bowedbelt. 皮帶彎卷Tension it or replace.張緊皮帶或更換3Load being placed on belt off-center. 落料點偏離皮帶中心Adjustchuteandloadingconditionssoastoplaceloadinthe center of belt.調(diào)整溜槽或落料點使物料落在皮帶中心Conveyorframeorstructurecrooked. 皮帶機(jī)架彎曲Straighten it.調(diào)直機(jī)架4Belt too stiff to train. 皮帶太硬無法調(diào)整Use self-alignin
5、g idlers. Increase tension/conforms to crowns.Use more flexible belt on replacement.承受自調(diào)偏拖輥 增大牽引力 用柔韌性好的皮帶替換Tilt troughing idlers forward, but not over 2 degrees. Use moretroughable belt. 2 度 需用更多的槽形拖輥Combination of causes listed under Paragraphs 2 and 3.Correct loading first.Othercausescanthenbeide
6、ntifiedandcorrected. 首先調(diào)整落料點,然后再考慮其它方法三、整機(jī)糾偏挨次The basic, and primary rule of tracking a conveyor belt is simply “THEBELT MOVESTOWARDTHATENDOFTHEROLLITCONTACTSFIRST.“是“膠帶朝與托輥最先接觸的一端運動”查膠帶首要的、根本的原則The NORMAL SEQUENCE of training is to start with the return run, working toward the tailpulley;following
7、with toprunin the directionof belttravel.Start with the beltempty.After tracking is completed, run the belt with a full load and re-check tracking.檢查膠帶的正常挨次是先從下皮帶開頭,向機(jī)尾處檢查;隨后延皮帶運行方向檢查上皮帶。先空載檢查,之后再帶載檢查。TRACKING ADJUSTMENT is done while the belt is running and should be spread over some length of the
8、conveyor preceding the region of trouble.Permit the belt to run for several minutes and at least three full belt revolutions after idler has been adjusted to determine if additional adjustment is required.If the belt has over-corrected, it should be restoredbymovingbackthesameidler,andnotbeshiftinga
9、dditionalidlersorrollers.應(yīng)在 Conveyor troughing idlers are offered in a widevariety of styles. Troughing angles include 20, 35,&45.Thestandsareprimarilytwo(2)typesand vary with each manufacturer.皮帶槽形托輥有多種203545制造商不同而變化enlarge#1enlarge#2Thisstandhasnotilt,andis designed for the conveyor belts to run i
10、n both directions. It has no real assist in belt tracking前傾,適用于雙向運行皮帶。在皮帶調(diào)整方面沒有多大作用.“Tilted“ (2) In the direction of belt travel.runinthisdirectiononly. The2 tilt offers good results in conveyor belt tracking.2Straightstandscanbetilted2forwardbyplacingunderthebacksideofidlerstandindicated by arrows.
11、 Remember, this conveyor only runs in one direction.如圖中箭頭所示:通過在托輥后1/8“2。留意,這種皮帶只能向一個方向運行conveyors,thebeltrunsgreatin one direction, only to run off when reversed.Question?Whatareyouusing? Ifyouareusingtiltedstands, they are good for one direction only狀況下,配置這種托輥的皮帶在單一方向上運行的很好,只是在皮帶反轉(zhuǎn)時才消滅問題。有什么問題嗎?你們用
12、的是什么托輥?假設(shè)你們正在使用傾斜托輥架,它們只會在一個方向運行。On reversing conveyors where tilted stands are already in service and giving problems, you can neutralize the tilt by placing a 1/8“ thick washerunder the front side of the idler stand opposite thesideindicatedbyarrows.Nowwiththetiltedstandsneutralized, you can run y
13、our conveyor belt eitherdirection.在雙向運轉(zhuǎn)皮帶上假設(shè)安裝了這種傾斜托輥并且消滅問題,如下圖,可在托輥架傾斜的反方向上安置皮帶可以進(jìn)展雙向運行了。The only part of the troughing idler that hs any training effect on the conveyor belt is the center Re-readthisstatement.enlarge#3enlarge#4enlarge#5的唯一局部就是中心托輥。認(rèn)真閱讀這一局部內(nèi)容The rollers indicated by the arrows form
14、 the troughintheconveyorbelteither20,35,or45.Theyoffer load support, but do not have any training effect on the conveyor belt.、3545。它們起支撐作用,但對皮帶運行無實質(zhì)影響。Thisexampleaccountsforthelargestsinglecauseofconveyor belt tracking problems. You will note thattheconveyorbeltdoesnotcontactthe centerrollofthe tro
15、ughing idler which is the only part of the trouging idler that has any training effect on the conveyorbelt.Youcanturnthistroughingidleruntilyouareblueinthefaceandyouwillsee noresults.有任何結(jié)果,即使調(diào)到你臉色發(fā)藍(lán)也是如此。How many times have you heard this saying? “My emptybutwhenIputaloadonit,thebeltgoescrazy.“Well,l
16、et”slookatourexampleindicated by the arrow. There is no cneter roll contactuntilyouputaloadontheconveyorbelt.Atthis time the weight of the load makes the conveyorbeltcontactthecenterrollswhichareturnedinalldirections. Now the training effect takes place andthe conveyor belt does what it is told to d
17、o by thecenter roll of the troughing idler.一旦帶載后,就會消滅很多問題”。是的,如圖中箭頭所示,讓我們看看例子。在皮帶未帶載之前,中心的托輥沒有與皮帶接觸。一旦帶載后物料的重量使皮帶與中心托輥接觸,在此之前,中心托輥可以任意旋轉(zhuǎn)?,F(xiàn)在實質(zhì)性的影響發(fā)生了,皮帶會延著中心托輥設(shè)定的路線運行。 Thisexampleshowsthecorrectconveyorbeltcontactwith the center roll of the troughing idler. the conveyorbeltshouldnotjustbarelytouchthe
18、centerrolls but should touch hard enough to flatten the conveyor belt over the whole rolls face.enlarge#6enlarge#7展,幾乎與中心托輥緊緊貼在一起。It may be necessary to shim roller frames several inches to contact center rolls. Concave curves in thetendencytolifttheconveyorbeltsthetroughingidlers,resultingin Big Pr
19、oblems.或許將中心托輥墊高幾英寸來使皮帶與中心接觸是必需機(jī)架形成的軌跡,結(jié)果造成大問題。Whichwaydoweturnoradjustidlerstomoveconveyor belts to a corrective position? The easiest way to remember is to think of the troughing idler or flatrolls as being the handlebard on a bicycle. Look attheconveyorbeltinthedirectionofbelttravelandsteertheidl
20、ersinthesamewayasbicyclehandlebars until you move the conveyor belt to the desired position.Thetrainingefortiscausedbythefrictionforceofthescruffingactionoftheconveyorbeltasit passes over the cocked idler.調(diào)整托輥或皮帶應(yīng)承受哪種方法呢?最簡潔的方法就是整,這時可無視托輥的存在。Thisexampleshowsatroughingidlerwiththeconveyorbeltrunningt
21、othefarright.The correctadjustmentwould be driving the side of the troughing idler bythearrow.Smalladjustmentsshouldbemadeandtheconveyorbeltshouldmaketwo(2) revolutions before more adjustments are made.enlarge#8將托輥架向圖中箭頭所指方向移動。調(diào)整時幅度要小,此時在更多調(diào)整之前皮帶可能會產(chǎn)生兩種結(jié)果。Thisexampleshowsatroughingidlerwiththeconvey
22、orbeltrunningtotheleft.Thecorrectadjustmentwouldthetroughingidlerforwardasindicated by the arrow.將托輥架向圖中箭頭所指方向移動。enlarge#9enlarge#10enlarge#11This example shows two (2) flat return rolls with conveyor belt running far right (top roll) and conveyor belt running far left (bottom roll). The correct adj
23、ustments would be driving the end of theflat return roll forward as indicated.機(jī)頭機(jī)尾This example shows a tail pulley with the conveyorbeltrunningtothefarleft.Thecorrectadjustmentindicatedbythearrow.Fortraining purposes, the tail pulley belongs to the return side or bottom side of the conveyor.目的,將機(jī)尾滾筒
24、看作皮帶的回程局部或皮帶下部。Note:Thetailpulleyshouldneverbeusedinaneffortbelt.thetailpulleyshouldbeleftsquare.Thelastreturnrollcomingtothetailtroughingidleronthetopsideoftheconveyordeterminehowtheconveyorbeltrunsor centers on the tail pulley.筒是用來保持機(jī)架成方形的??拷鼨C(jī)尾滾筒的第一個回程托輥和靠近機(jī)頭滾筒的第一個上托輥打算皮帶的運行及機(jī)尾滾筒的中心。This example s
25、hows a tail pulley with the conveyorfarright.Thecorrectadjustmentwould be to move the side indicated by the arrow.enlarge#12enlarge#13enlarge方法是按圖中箭頭所示進(jìn)展調(diào)整。This example shows head pulley with conveyor belt runningtofarright.Thecorrectadjustmentwouldbebythearrow.Fortrainingpulleybelongstothetopsideor
26、carrying side of the conveyor.方法是按圖中箭頭所示進(jìn)展調(diào)整。機(jī)頭滾筒屬于皮帶頂部或帶載側(cè)。This example shows a head pulley with the conveyorleft.Thecorrectadjustmentwould be to move the side indicated by the arrow.方法是按圖中箭頭所示進(jìn)展調(diào)整。#14enlarge#15The centering of the conveyor belt as it passes overthe tail pulley and the centering of
27、 the load on theconveyor belt as it passes under the loading point, are the two most important factors in assuring a straight running conveyor belt.打算皮帶運行平直的兩個最重要的因素是:當(dāng)皮帶通過機(jī)尾滾筒時的中心以及當(dāng)皮帶帶載時帶載點的中心位置。This example shows conveyor belt running centered onthe conveyor troughing idlers, but the loading chut
28、eis off center to the right of the conveyor belt. Theresult is the conveyor belt will start moving to theleft.enlarge#16enlarge#17enlarge#18心時情形。這種情形的結(jié)果是皮帶將向左跑偏。theconveyorbeltfinallytrackingoff to the left side of the conveyor, spilling material the entire length of the conveyor.灑落。betorelocatethec
29、hutetothebeltorbaffleanddiverttheflow to the center.的中心。This example shows the approximate amount of sag onreturn rollers required for good tracking. Sag is regulated by the amount of weight placed on a counterweighttakeuportheamountofforceappliedto a screw take up. The take up serves four needs:Tak
30、e up maintains slack side tension on conveyorbelt to prevent slipping on drive pulley.Compensates for variations in the belt lengthresulting from belt stretch or shrinkage.sagbetweentroughingandreturnrollers.Take up provides live storage for extra beltingwhich can be used for resplicing.本例顯示了保持皮帶良好運
31、行狀態(tài)在回程皮帶上所需要到四種作用:1、保持皮帶在機(jī)頭滾筒上張緊力;2、補償皮帶由于伸長或收縮產(chǎn)生的變化;3、削減上下托輥之間產(chǎn)生的額外懸垂度;4、供給皮帶在安裝時所需要的額外有效儲存。enlarge#19enlarge#20Concave conveyors will head your list of problem conveyors.Thisisduetothefactthattheconveyorbelt will lift off the troughing idlers and returnthedottedlines.Therewillbelong distances of n
32、o roller contact ad lack of training.較長的距離內(nèi)沒有托輥。The best start on solving this problem will be reducing the counter weight (if possible). You mayalso alternate return rolls over and under the returnsidetoassuregoodrollercontact and tracking. (see next example)假設(shè)可能的話。也可以將回程皮帶側(cè)的前后托輥進(jìn)展替換以確保皮帶與托輥保持良好的接觸
33、。見下例Exampleshowsreturnrollsalternatedoverandunderconveyorbelttoassuregoodbeltcontact.Techniquecan be use concave curves where conveyor belt will lift off return rollers on return side (see next example). This technique may also be used on bowed conveyorbeltswhichonlycontactreturnrollsontheveryedgeso
34、ftheconveyorbelt.Thistypeofcontactmakes the conveyor belt impossible to train, but byneutralizing the bow. the conveyor belt can be trained.本例顯示將回程皮帶上下托輥替換以保持皮帶與托輥的參看下例。這種技術(shù)在弓形皮帶上也有應(yīng)種類型的接觸使皮帶有可能通過下壓弓形局部來進(jìn)展調(diào) 節(jié)。conveyorbeltthatisundertheinfluence of excessive counter weight. Excessive edgesoftheconveo
35、rbelttocurlup on the troughing idlers on the top side of the onthereturnrolsonthebottomside of the conveyor.enlarge#21enlarge#22曲。weightwillrelaxthebowing,butimplementthetechniqueshownin prior example to return side.實行這種技術(shù)是必需的。Whenreducingcounterweighttorelaxconveyorbeltsin concave curves or just to
36、 get the proper sag on rollersfortracking,itisimperativethatthedrivepulleysontheconveyorbelaggedwitha60durometerrubber material to prevent slip of the conveyorbelt on the drive pulley. Water and dust act as lubricants on the drive pulley and cause tracking problems. Chevron grooves in the lagging co
37、ver willassist with their removal. The chevron grooved pulleyabove is a one directional pulley. If it is installedwith the chevrons running in the wrong direction oris used on a reversing conveyor, tracking problems will most likely occur. Water and dust will be channeled to the center of the drive
38、pulley. On reversing conveyors, a diamond pattern of grooves mustbeusedtoshedmaterialineitherdirectionofrunning.當(dāng)在凹弧曲線段皮帶上減小配重或使皮帶在運行時保持 60的橡膠以阻擋皮帶懸垂的影響。機(jī)頭滾筒上的水、灰塵以及潤滑劑會導(dǎo)致皮帶消滅問題。滾筒包膠上的凹槽能避開皮帶的相對移動。機(jī)頭滾筒上的包膠延單向布置。假設(shè)機(jī)頭滾筒上的水或灰塵會進(jìn)入機(jī)頭滾筒上的橡膠凹槽內(nèi)。在雙向皮帶上要應(yīng)用菱形花紋的驅(qū)動滾筒,這樣可使皮帶向任意方向運送物料。Ifyouhavereducedcounterweight,andconveyorbelt sliptakesplac
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