《毕业设计外文翻译--管状带式输送机的参数计算和结构设计.doc》由会员分享，可在线阅读，更多相关《毕业设计外文翻译--管状带式输送机的参数计算和结构设计.doc（14页珍藏版）》请在金锄头文库上搜索。
1、中文3150字英文原文Parameters Calculation and Structure Design of Pipe Belt ConveyerZaimei Zhang1, Fang Zhou2, Jianheng Ji21School of Mechanical Engineering, University ofJinan, Jinan 250022, Shandong Province,China2Departments ofInformation Engineering, Shandong Water Vocational College, Rizhao 276826,Shan
2、dong 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 conventional be
3、lt conveyor s. The parameters such as throughput, belt speed, belt width, resistance, tension in belt and power are described. The length of transitionsection is analyzed because it is important to the belt life. Hexagon supporting rollers and tipping device are necessary parts ofpipe belt conveyor.
4、 The structures of them are also discussed.keywords: Pipe Belt Conveyor, Transition Section,Hexagon Supporting Rollers, Tipping Device 1. IntroductionPipe belt conveyor is a new type of special belt conveyor which developed from the conventional belt conveyor. In this conveyor, flat belt is forced t
5、o 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 Gennany
6、 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 the
7、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 conv
8、eyance can be realized. But tipping device for belt must be added. Characteristics are obvious due to its special structure comparing with other belt conveyor1.(1) Unpolluted conveyanceIn pipe belt conveyor, material doesnt come out and isnt influenced by environment because the belt is tubular and
9、the two sides lap over each other. When it conveys powder, food and chemical material etc., this advantage is obvious.(2) Big obliquity of conveyanceObliquity can reach about 18 in the conventional belt conveyor. But in pipe belt conveyor, material is enveloped in pipe and friction between material
10、and belt is greater than before. So obliquity can be increased to 30 The bigger obliquity is, the shorter conveyance length will be. This can result in lower cost.(3) Two-way conveyance is convenientBelt can be tubular in return of pipe belt conveyor and material can be conveyed in the reverse direc
11、tion by special device such as special feeder and tipping device.(4) Conveyor bed is narrowIn conveyance, bed is narrow because the cross section is a circle. The required building space and building steel are reduced. The bed cost is low and it can be used when space is limited.3 .Main parameters c
12、alculation of pipe belt conveyorMain parameters in pipe belt conveyor are throughput, belt width, belt speed and power. But production throughput is always given.3.1 Calculation throughputThroughput of conveyor can be fonnulated as follows2:Where is belt speed, is the pipe area, is density of materi
13、al conveyed and 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, =0.75. If material size is half of pipe diameter, =0.58. If material size is two thirds of pipe diameter, =0.44.3.2 Belt spee
14、dBelt speed is determined by characteristic of material, throughput, belt width and the installation method of conveyor. Generally speaking, quick belt speed is beneficial because it can reduce belt width and tension in belt when throughput is constant. This will economize on investment in belt and
15、power consumption. Belt speed usually used is 25m/s3.3.3 Belt widthBelt width can be calculated according throughput. The belt diameter can be expressed2:Where d is pipe diameter.The lap of two sides is about one third or half of pipe diameter. When belt is tubular, the relationship between belt wid
16、th and pipe diameter is as follow:3.4 Running resistance calculationThe method has no difference in resistance calculation between pipe belt conveyor and conventional belt conveyor. Generally, Coefficient of resistance is usually used in resistance calculation. Tension in belt is calculated point by point. Extrusion force is increased because material is enveloped in pipe. Therefore coefficient of
