機(jī)械類外文文翻譯--拋丸清理機(jī)對板材軋輥進(jìn)行拋丸處理(存儲版)
【正文】 2 machine was repaired, it was discovered that the control device frequently did not operate because of corrosion of the parts. With normal charging of abrasive (375 kg according to the nameplate), blasting must be stopped after each alternate pass of the nozzles, since after another pass the shot in the lower partment is insufficient, and during blasting, With nonoperation of the control device, it does not drop from the upper partment to the lower. Delivery of the nextportion of shot must be done only after the operator disconnects the shot blast equipment from the air system. In this case both charging vents are opened, and the abrasive is fed to the lower partment. Continuous operation of the machine for three or four passes of the nozzles with nonoperation of the control device and the delivery of shot described above became possible after increasing the standard charge to 650 kg. However, the basic solution of this problem is stable operation of the control device. The used shot is collected by the collecting bunker of the working chamber and drops into 4 the receiving chute of the worm conveyor. The plates parallel to the worm conveyor are at a greater angle, and those perpendicular are at less of an angle, which tends to collect shot on them. Therefore, after blasting one roll it is necessary to shut the machine down to push the accumulated shot on to the screw conveyor. To eliminate this shorting, it is possible to lengthen the screw conveyor, which is half the length of the working chamber. In addition, the smaller plate is removed pletely,and the parallel plates are elongated to correspond with the length of the worm conveyor. The pressed air supplied to the collector of the shot blast equipment is dried by an oil moisture separator. However, this method of drying is inadequate. Water vapor condenses in the main line and in the shot blast equipment, and as a result shot sticks together in the lower partment and forms a solid mass. The solid mass clogs the vertical channels along which the abrasive is transported to the collector and disrupts the optimum ratio of shot to air in the blast. This has a detrimental effect on the blasting process and the quality of the roll surface. The presence of moisture in the air causes corrosion of the equipment and causes operation of the pneumatic equipment of the machine to be poorer. Therefore, in designing shot blast equipment,it is necessary to specify equipment for drying the air. Foreign firms, for example, use special drying equipment utilizing water absorbing substances such as silica gel and activated alumina for drying pressed air. 5 The mechanism for moving the nozzle has a number of shortings. Application of the jet of abrasive material on to the roll is through a nozzle mounted in an elbow shaped gun (Fig. 2). A shorting of the gun is the throttling of the mixture of pressed air and shot where the vertical and horizontal channels join. The junction is a right angle, which causes quick wearing away of the elbow. The cross sections of the channels and nozzle was increased. However, with an increase in the nozzle diameter from 10 to 12 mm (the allowable maximum) the consumption of air increased from 13 to 19 mS/h, which changed the ratio of shot to air in the blast. However, thi
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