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1、附录ADiscussion about pull installation of belt conveyerBelt conveyer also claimed rubber belt conveyor, which is called leather belt in the Produce scene, is the continuous facility for transporting of the common enter- prise of factories and mines. It is widely used under the well of coal mine, part
2、icularly extensively. The major parts of belt conveyer include conveyer belt, actuating device, bearing roller, cylinder, frame, tension station, brake, supplementary equipment as well as electromechanical protective device and so on. When designing belt conveyer, first, should determine original en
3、umerated data, such as the expected productivity, conveyer transport line picture, the way of giving material and discharge way by working condition and the installation feature of conveyer as well as the physical mechanical performance of transportation stock and so on; And in the design cacula- ti
4、on of type selecting need to select related parameter reasonably, for example band- width, belt speed and wraps angle of the driving pulley, the operation resistance coefficient of parts , make them close to actual operation state worth in order to raise economic benefits and the comprehensive techn
5、ology of belt conveyer. Since belt conveyer is to lean conveyer belt, the friction with drive pulley transmits haulage , therefore tension station can be designed with definite parameter according to the requirement for tension in the operation of conveyer belt which including characteristic, instal
6、lation location, tension adjusting range and the type of tension station and so on. Tension station can directly affect the performance of belt conveyer as its performance of essential important composition part of belt conveyer. In belt conveyer system, the main effect of tension station has the fo
7、llowing:（1）Guarantee conveyer belts split of driving pulley have proper tension in order to prevent conveyer belt from dozening slippery. Belt conveyer depend on the friction between support conveyer belt and driveing pulley, in appearance meet with split to produce a tension haulage of system. Ther
8、efore to make belt conveyer stabilize operation need to guarantee conveyer belt have enough tension in driveing pulley split place, in order to make conveyer belt rely on , with the friction of cylinder, transmiting the haulage needed by system. If split place has little tension, the friction haulag
9、e that conveyer belt transmits cant make belt conveyer run , conveyer belt would hit on cylinder slippery. (2) Guarantee having necessary tension each on the girth of conveyer belt so as satisfy sag requirement. Conveyer belts sag between two bearing rollers should not be exceptional , otherwise con
10、veyer belt would relax excessly to lose groove shape cause the sideslip of conveyer belt , arouse spillage , increase operation resistance. Therefore automatic tension station should guarantee that conveyer belt has enough tension in the minimum tension place in order to restrict sag between bearing
11、 rollers on conveyer belt, keep belt conveyers steady operation. (3)The regulation of tension in the not steady working condition of start , brake etc. In the course of starting, because of acceleration sport of belt conveyer, the haulage that conveyer belt need to transmit bigger than steady operat
12、ion much, therefore it has to raise the tension value in the split place of the driveing pulley to produce larger haulage. And in brake course, especially for the conveyer of long distance and big volume, as the role of force, the tension on the tight side of conveyer belt can reduce , even arouse t
13、he tape of layer upon layer probably; Loose side, the tension of conveyer belt can increase , even arouses belt broken probably , therefore tension value must be prompted in time. Additionally, in operation course, the change of load make leather belt appear suddenly tension unusual, tension station
14、 should be given prompt adjustment , in order to reduce leather belt to hit the accidents such as belt sliding, belt broken. (4) Compensate line viscous elongation and the flexible elongation of conveyer belt.conveyer belt can automatic elongation as time goniong, and occur permanent elongation unde
15、r transitional operating mode, , so it is needed to compensate plasticity and the change of elongation in transitional operating mode. Since load change can arouse conveyer beltslength changing, vermicular phenomenon can also cause the elongation of conveyer belt, and tensile force changes , it has
16、to regulate the location of tension pulley often , and guarantee the normal operation of belt conveyer. (5)Offer necessary route for conveyer belt to contact again.Each belt conveyer has some joints , possibility in certain contact for a short while can arise problem, must stop first and then make the joint again. Tension station has prepared the belt besides load for belt conveyer, so contacting fault can be contacted again through relax tension stati
