外文翻譯管狀帶式輸送機的參數(shù)計算和結(jié)構(gòu)設(shè)計大學(xué)論文

1、中文 3150 字英文原文Parameters Calculation and Structure Design of Pipe BeltConveyer1 2 2 Zaimei Zhang , Fang Zhou, Jianheng Ji1School of Mechanical Engineering, University ofJinan, Jinan 250022, Shandong Province,China2Departments ofInformation Engineering, Shandong Water Vocational College, Rizhao 276826

2、,Shandong Province, ChinaAbstract: Pipe belt conveyor is a new type of special belt conveyor and it is wildly used in conveying powder material. In the paper, the advantages of pipe belt conveyor are introduced. Calculation of pipe belt conveyor s main parameters is different from that of convention

3、al belt conveyor s. The parameters such as throughput, belt speed, belt width, resistance, tension in belt and power are described. The length of transition section is analyzed because it is important to the belt life. Hexagon supporting rollers and tipping device are necessary parts ofpipe belt con

4、veyor. The structures of them are also discussed.keywords: Pipe Belt Conveyor, Transition Section,Hexagon Supporting Rollers, Tipping Device1. IntroductionPipe belt conveyor is a new type of special belt conveyor which developed from the conventional belt conveyor. In this conveyor, flat belt is for

5、ced to be tubular by supporting roller groups and material conveyed is enveloped in it. Therefore airproof convey is realized in whole conveyance line. Pipe belt conveyor was proposed in 1964 by Japan Pipe Conveyor (JPC), and it went into real use in 19791 .After that, it was rapidly developed in Ge

6、nnany and America and widely used abroad. But it is not deeply studied and its use is much limited in China.2. The characteristics of pipe belt conveyorFigurel is for the structure of pipe belt conveyor. The load is putted on by the feeder at the end of conveyor.The belt is flat when it runs through

7、 the driven roller and it is conducted by a series of supporting rollers to be tubular gradually. Thus airproof conveyance is realized. In order to discharge, the pipe is also conducted by a series of supporting rollers to be flat near the driving roller. The conveyor discharges at its head. Two-way

8、 conveyance can be realized. But tipping device for belt must be added. Characteristics are obvious due to its sp ecial structure comparing with other belt conv eySr.(1) Unp olluted con veya neeIn pipe belt con veyor, material does nt come out and isnt in flue need by en vir onment because the belt

9、is tubular and the two sides lap over each other. Whe n it conv eys po wder, food and chemical material etc., this adva ntage is obvious.(2) Big obliquity of con veya neeObliquity can reach about 18 in the conven tio nal belt conv eyor. But in pipe belt conveyor, material is enveloped in pipe and fr

10、iction between material and belt is greater tha n before. So obliquity can be in creased to 30 The bigger obliquity is, the shorter conv eya nee len gth will be. This can result in lower cost.(3) Two-way conv eya nee is convenientBelt can be tubular in retur n of pipe belt con veyor and material can

11、 be conv eyed in the reverse directi on by sp ecial device such as sp ecial feeder and tipping device.(4) Conv eyor bed is narrowIn conv eya nee, bed is n arrow because the cross secti on is a circle. The required build ing sp ace and buildi ng steel are reduced. The bed cost is low and it can be us

12、ed whe n sp ace is limited.Figure 1. Structure of pipe belt conveyor3 .Main p arameters calculation of pipe belt conveyorMain p arameters in pipe belt con veyor are through put, belt width, belt sp eed and po wer. But p roducti on through put is always give n.3.1 Calculation through putThrough put o

13、f conv eyor can be fonnu lated as followW】：Q= 3600VF ZWhere V is belt speed, F is the pipe area, 丫 is density of material conveyed and 0 is coefficient of material filling, = 0.440.8. If material size is less than one third of pipe diameter, =0.8. If material size is one third of pipe diameter, =0.7

14、5. If material size is half of pipe diameter, =0.58. If material size is two thirds of pipe diameter, 1 =0.44.3.2 Belt sp eedBelt sp eed is determ ined by characteristic of material, through put, belt width and the in stallati on method of conv eyor. Gen erally sp eak ing, quick belt sp eed is ben e

15、ficial because it can reduce belt width and tension in belt whe n through put is con sta nt. This will econo mize on inv estme nt in belt and po wer consump ti on. Belt sp eed usually used is 2 5m/s3.3.3 Belt widthBelt width can be calculated accordi ng through put. The belt diameter can be expresse

16、和:d _j41400VWWhere d is pipe diameter.The lap of two sides is about one third or half of pipe diameter. When belt is tubular, the relatio nship betwee n belt width and pipe diameter is as follow:B =(沢 + (1/3 : 1/2)d3.4 Running resistance calculationThe method has no differe nee in resista nee calcul

17、ati on betwee n pipe belt conv eyor and conven ti onal belt conv eyor. Gen erally, Coefficie nt of resista nee is usually used in resista nee ealeulatio n. Tension in belt is calculated point by point. Extrusio n force is in creased because material is enveloped in pipe. Therefore coefficie nt of re

18、sista nee in pipe belt conv eyor is greater tha n that in conven ti onal belt conv eyor.(1) Resista nee in tangentResista nee in belt with loaf:W =(qo +qi + q2)BglcosP (qo +qi)HgResista nee in belt without load:W =(qo +q3)國 gleos 尸 qoHgWhere W is resista nee in running, C0 is the unit mass of belt p

19、er meter, q? is the average unit mass of the upper supporting rollers per meter along the belt, q is the unit mass of material per meter along the belt, q3 is the average unit mass of the below supporting rollers per meter along the belt, l is the length of conveyanee, P is obliquity of conveyanee a

20、nd is coefficient of resistancein supporting rollers, showed in table 1.Table 1.Coefficie nt of resista nee in supporting rollersconditionparailel supporting rollerstrough sup porting rollershexagm suppoding rollersdean dry and no wearing dust indtxjrs0.0 IS030.035-0.045fcwwearingdustundernormal tem

21、perature0.02501045-0.055lots of wearing dust quidoors0.0350,0550.075(2) Resista nee in curvatureResista nee in curvature is caused by belt ossificati on and frictio n in roller beari ngs. It is prop orti onal to the tension at curvature entran ce. That 隱：S =CSiWhere S is the tension in belt at curva

22、ture exit, Sis the tension in belt at curvature entrance and C is coefficie nt of resista nee.3.5 Tension calculation in beltAfter resista nee in each secti on has bee n calculated, we can calculate the tension at every point. We can divide whole p ath into several tangents and curvatures and number

23、 every joint before we calculate. Tension at any point is calculated by the2formula as followed :Where S and Sare tension in belt at point i and point i-1,叫匸門 is resista nee betwee n point i and point i -1 .The tension at driving roller entrance and driving roller exit can be obtained.Circumfere nti

24、al force on driv ing roller can be described by followi ng exp ressi on:P =Sn3Where P is circumferential force on driving roller, Sn is the tension in belt at driving roller entrance and S, is the tension in belt at driving roller exit.The follow ing con diti on must be satisfied because the belt do

25、 not p ermitted to slide on driv ing roller2.Sn蘭Se電Where 卩 is the coefficient of friction between the belt and driving roller, a is an gle of the belt enveloping on the roller.3.6 Power calculationPo wer is mai niy con sumed in overco ming running resista nee. And some po wer is used in elevati ng m

26、aterial in sloping conv eyor. Po wer on driv ing roller shaft can be calculated by the follower exp ressio用：_ PVN 0 1000So the motor po wer is:Where K is a factor of safety and n is transmission device efficiency.4 Structure design of pipe belt conveyor4.1 The length of transition sectionFigure 2 Le

27、n gth of tran siti on sect ionTransition section is shown in figure 2. The belt is flat at driving roller and drive n roller. The belt is turned from flat belt into tubular one at tran siti on secti on. The length of transition depends on the permissible extension of belt. If transition section is t

28、oo short, additional deformation and stress will be great in both sides of belt. This will result damage to belt. If transition section is too long, distanee of air proof conv eya nee in whole line will be shorte ned. Gen erally sp eak ing, the len gth of tran siti on secti on equals to 25 diameters

29、 in nylon belt while 50 diameters in wire rope belt3.4.2 Design of suppo rting rollersP arallel supporting rollers must be used n ear driv ing roller and drive n roller so that the an gle of the belt enveloping on the roller is big eno ugh. But at other p ositi on in tran siti on sect ion trough sup

30、porting rollers are used. Thus the flat belt can become tubular one gradually and additi onal stress at edge of belt can be reduced. So trough an gle is usually 20 ,30 ；45 ,60 and 90Since imp act load at material entrance is in evitable, three groups of cushi oning supporting rollers can sever to re

31、duce the intensity of shock loads and its spacing is about 30500mm .Hexag on supporting rollers are widely used after the flat belt becomestubular onel5J ? Rollers can be equipped on the same side or two sides of the supporting board. is easy to p ositi oning rollers p recisely and the force in belt

32、 is un iform whe n the six rollers are equipped on the same side of supporting board. Gen erally sp eak ing, the adjace nt rollers spacing should not exceed the belt thick ness, usually 8mm. If thespacing were too big, the edge of belt would jam in it. There are three rollers on each side of the sup

33、porting board whe n rollers are equipped on two sides of it. The len gth of roller can be Ion ger tha n the len gth of hexag on side and the belt can not jam in the sp ace of adjace nt rollers. On the other hand, the force in supporting board is uniform. Rollers on supporting board are show n in fig

34、.3 and fig.4.Figure 3 .Rollers on same side of suppporting board叫嚴半*穿；:- rI*ya宸:7-JllFigure 4. Rollers on two side of suppporting boardRigidity is greatly in creased after flat belt becomes tubular. So supporting rollers spacing can also be in creased. Supporting roller groups spacing with load is a

35、bout 1.2m or 1.0m and it is 3.0m in return in conven ti onal con veyor, while it varies with the pipe diameter in pipe belt conv eyor. The greater pipe b diameter is, the greater the spacing is5. The relati onship etwee n pipe diameter and the spacing is show n in table 2問Table 2. The relationsh ip

36、between pipe diameter and supp orting roller groups sp acingpipediamelerfmni0 15002000300450supporting roller groups &pacing(mj1.51.6L82.74.3 Belt tipp ing deviceRemnant material on belt will pollute environment and adhere to rollers and supporting rollers after discharge. This will result to belt w

37、ear. So the same side of belt is always used whe n con vey ing material. Belt tipping device severs to overtur n the belt .It con sists of several rollers. The belt is hold by two horiz on tal rollers and two vertical rollers and tum 90 Then another two horizontal rollers hold the belt and tum it 90

38、 atthe same direct ion. Thus belt overtu rn is realized. The spacing betwee n horiz on tal rollers and vertical rollers depends on belt width and op erati on con diti ons.5. ConclusionCompared with conventional belt conveyor, pipe belt conveyor has so many advantagesthat it will be widely used in th

39、e future. When calculating parameters, some formals in conven ti on belt con veyor can be used in pipe belt con veyor, but some coefficie nts must be modified. The po wer is greater in pipe belt con veyor tha n in conventional belt conveyor because friction is great in pipe belt conveyor. The transi

40、tion section length depends on the belt type and pipe diameter. Parallel supporting rollers and trough supporting rollers in conven ti onal belt con veyor can also be used in pipe belt conv eyor, but trough an gle varies with the poison where trough supporting rollers are in stalled. Hexag on suppor

41、ting rollers and tipping device exist only in pipe belt conveyor and their structure is described in this paper. Supporting roller groups spacing also varies with pipe diameter.References1 Kai Liu, Application and Development of Pipe Belt Conveyor, Coal Techn ology, 2006,25(09): 19-212 Mat on A E, P

42、o wer and Cap acity Review of Tubular Pipe and Trough Con veyor, Bulk Solids Ha ndin g, 1997,17(1):47-503 Zhiping Li, Application of Pipe Belt Conveyor in Bulk Handling, Electric Power Survey & Desig n,2003,1:48-524 Weiga ng Song, Ye Yu, The Devel opment and Critical Tech niq ues of the Pipe Belt Co

43、n veyor, Ceme nt, 2005,04:42-46 Yuefeng An, Pipe belt conveyor, S P & BMH Related engineering. 2006,2:39-426 Gregory A Vaka, Pipe Conveyor-Development and Advantages, Bulk Solids Ha ndli ng, 1998,18(3):451-455中文譯文管狀帶式輸送機的參數(shù)計算和結(jié)構(gòu)設(shè)計摘要:管狀帶式輸送機是一種新型的專用帶式輸送機，它可廣泛應(yīng)用于粉狀物料 的運輸。論文介紹了管狀帶式輸送機的優(yōu)點。 計算了不同于普通帶式輸送機

44、的管 狀帶式輸送機的主要參數(shù)。描述了管狀帶式輸送機的輸送能力、帶速、帶寬、摩 擦阻力、膠帶張緊力和功率。分析了過渡段長度，因為它對膠帶壽命很重要。六 邊形托輥和傾翻裝置是管狀帶式輸送機的必要原件。 它們的結(jié)構(gòu)在論文中也進行 了論述。關(guān)鍵詞： 管狀帶式輸送機，過渡段，六邊形托輥，傾翻裝置1.緒論 管狀帶式輸送機是在普通帶式輸送機基礎(chǔ)上發(fā)展起來的一種新型專用帶式 輸送機。在該輸送機中， 平直的膠帶被托輥組卷成管狀， 物料被包在管狀膠帶中 運輸。因此可實現(xiàn)整個運輸路線封閉運輸。 1964 年，日本管狀輸送機公司研發(fā) 了管狀帶式輸送機， 1979 年正式投入使用。隨后，該輸送機在德國和美國獲得 了迅速

45、發(fā)展和廣泛應(yīng)用。 但是，中國對該輸送機未進行深入研究， 其應(yīng)用被大大 限制了。1 所示。在輸送機尾部的進料器將物料裝載到輸送2.管狀帶式輸送機特性 管狀帶式輸送機結(jié)構(gòu)如圖它是平直的， 然后經(jīng)一系列托輥引導(dǎo)， 逐漸轉(zhuǎn)變?yōu)?為了卸載， 管狀膠帶也需要一系列靠近驅(qū)動滾筒 該輸送機在其機頭部卸載。 它可以實現(xiàn)雙向運輸。機膠帶上。 當(dāng)膠帶通過從動滾筒時，管狀。從而可以實現(xiàn)封閉運輸。 的托輥引導(dǎo)從而轉(zhuǎn)變?yōu)槠街钡?。但是必須加設(shè)傾翻裝置。 由于其特殊結(jié)構(gòu)， 與其他帶式輸送機相比， 它的特征是 很明顯的 1 。（1）清潔運輸 在管狀帶式輸送機中， 物料不會泄露出來并且不受環(huán)境的影響， 因為運輸膠 帶是管狀的，膠

46、帶的邊緣搭接在一起。當(dāng)運輸粉狀物料、食物和化學(xué)物料等時， 該優(yōu)點十分突出。（2）大傾角運輸 普通膠帶運輸機的傾角可以達到 18左右。但是，在管狀帶式輸送機中，物 料被包在管狀膠帶中，物料和膠帶的摩擦力較大。因此其傾角可以增加到30。傾角越大，運輸長度將越短。這可以使成本降低。（3）便利的雙向運輸返回時，管狀帶式輸送機膠帶可以轉(zhuǎn)變?yōu)楣軤睢?通過專用進料器和傾翻裝置，物料可以進行反向運輸。(4) 狹窄的運輸機架在管狀帶式輸送機中，運輸機架是狹窄的。因為管狀膠帶的橫截面是圓形的。 這減少了必需的建筑空間和建筑物料。 運輸機架成本很低，當(dāng)安裝空間被限制時 依然可以使用。玄-圖1管狀帶式輸送機結(jié)構(gòu)3.

47、管狀帶式輸送機主要參數(shù)計算管狀帶式輸送機的主要參數(shù)包括：輸送能力、帶寬、帶速和功率。但是輸送 機輸送能力一般都是額定的。3.1輸送能力計算管狀帶式輸送機的輸送能力可以用下式表示2:Q = 3600VF式中，V 帶速；F 膠帶圓管截面積；Y物料堆積密度；*裝料充滿系數(shù)，取 0.440.8。當(dāng)物料塊度尺寸1/3管徑時，* =0.8;當(dāng)物料塊度尺寸=1/3管徑時，* =0.75;當(dāng)物料塊度尺寸=1/2管徑時，* =0.58;當(dāng)物料塊度尺寸=2/3管徑時，* =0.44。3.2帶速管狀帶式輸送機的帶速由物料特性、輸送能力、帶寬和輸送機安裝方式?jīng)Q定。 一般而言，較快的帶速是有利的，因為當(dāng)輸送能力額定時，

48、它可以減小帶寬和膠 帶張緊力。這可以節(jié)省膠帶材料和降低能量消耗。帶速一般取 25m/s。3.3帶寬帶寬可以根據(jù)輸送能力計算。膠帶管徑可以表示為：41400/詢JI式中，d 膠帶管徑。膠帶邊緣搭接長度大約為 徑關(guān)系如下：1/31/2管徑。當(dāng)膠帶是管狀時，帶寬和膠帶管d珂B =(兀 + (1/3 ： 1/2)d3.4運行摩擦阻力計算管狀帶式輸送機摩擦阻力的計算方法和普通帶式輸送機摩擦阻力的計算方 法一樣。一般，摩擦系數(shù)常用于摩擦阻力計算。膠帶張緊力逐點計算出來。因為 物料被包在管狀膠帶中，增加了對膠帶的擠壓力。因此，管狀帶式輸送機摩擦系 數(shù)比普通帶式輸送機大。(1) 切向摩擦阻力加載時膠帶摩擦阻力

49、:W = (qo +qi +q2)glcosP (qo +qi)Hg卸載時膠帶摩擦阻力W = (qo + q3) gl cos P + qo Hg式中，W 運行摩擦阻力； qo 每米膠帶質(zhì)量； q2 上部托輥沿膠帶每米平均質(zhì)量； qi 物料沿膠帶每米質(zhì)量； q3 下部托輥沿膠帶每米平均質(zhì)量；l 帶式輸送機長度；P 帶式輸送機傾角；0托輥摩擦系數(shù)，見表1。表1托輥摩擦系數(shù)環(huán)境平直托輥槽形托輥六邊形托輥清潔、干燥和無灰塵的 戶內(nèi)0.0180.020.035 0.045正常溫度下少量灰塵0.0250.030.045 0.055大量灰塵的戶外0.0350.040.055 0.075(2)彎曲摩擦阻力彎

50、曲摩擦阻力是由于膠帶硬化和膠帶與滾筒軸承摩擦引起的。它與彎曲入口處的張緊力成比例。即為：S4式中，S膠帶彎曲出口處的張緊力；S 4膠帶彎曲入口處的張緊力；C 摩擦系數(shù)。3.5膠帶張緊力計算當(dāng)計算出每一段的摩擦阻力后，我們可以計算出每一點的張緊力。在我們計 算前，我們可以將整個運輸路線分成若干切線段和彎曲段，并對每一個連接點進 行編號。任意一點的張緊力均可用下式計算:S+W（i）:i式中，S， S二一i點、i-1點處的膠帶張緊力；Wq H 1 i點和i -1點間的摩擦阻力。驅(qū)動滾筒入口和出口處的皮帶張緊力可以測得。 驅(qū)動滾筒上的切向力可以用 下式表示：P =Sn-S式中，P驅(qū)動滾筒切向力；Sn 驅(qū)動滾筒入口處膠帶張緊力； Si 驅(qū)動滾筒出口處膠帶張緊力。因為不允許膠帶在驅(qū)動滾筒上滑動，所以必須滿足下列條件：5 Se電 式中，卩一膠帶和驅(qū)動滾筒摩擦系數(shù)；a 膠帶