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1.电气专业：主变压器 2.机械专业：煤磨工作原理 3.水泥工艺专业：配料设计 4.自动化专业：控制系统 5.
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原文
1、立式煤磨工作原理:
立式磨煤机属于外加力型辊盘式磨煤机。电动机通过主减速机驱动磨盘旋转，磨盘的转动带动三个磨辊（120°均布）自转。原煤通过进煤管落入磨盘，在离心力的作用下沿径向向磨盘周边运动，均匀进入磨盘辊道，在磨辊与磨盘瓦之间进行碾磨。整个碾磨系统封闭在中架体内。碾磨压力通过磨辊上部的加载架、三个拉杆及液压缸传至磨煤机基础。磨煤机壳体不承受碾磨力。碾磨压力由液压系统提供，可根据煤种进行调整。碾磨压力及碾磨件的自重全部作用于减速机上，由减速机传至基础。三个磨辊均分布于磨盘辊道上，并铰固在加载架上。加载架与磨辊支架通过滚柱可沿径向作倾斜12～15°的摆动，以适应物料层厚度的变化及磨辊与磨盘瓦磨损时所带来的角度变化。
用于输送煤粉和干燥原煤的热风由热风口进入磨煤机，通过磨盘外侧的喷嘴环将静压转化为动压，并以75～90m/s的速度将磨好的煤粉吹向磨煤机上部的分离器。同时通过强烈的搅拌运动完成对原煤的干燥。没有完全磨好的原煤被重新吹回磨盘碾磨。原煤中铁块、矸石等不可破碎物落入磨盘下部的热风室内，借助于固定在磨盘支座上的刮板机构把异物刮至废料口处落入废料箱中，排出磨外。
磨好的煤粉进入磨煤机上部的分离器后，满足细度要求的合格煤粉被选出，并由分离器出口管道输送到煤粉仓。较粗的煤粉通过分离器下部重新返回磨盘碾磨。
2.S立式煤磨的结构特点
2.1 立式煤磨是采用引进技术经消化吸收后开发设计的产品，在我国水泥、电力、冶化工等行业已有大量应用，技术上已经成熟。
2.2 适用适用煤种范围宽，较低磨蚀性无烟煤、次烟煤、烟煤、水份较低的褐煤等均可磨制；
2.3 立式煤磨粉磨效率，粉磨能耗大大降低，与球磨相比粉磨电耗仅为球磨的50%-60%；整个粉磨系统的单位电耗为球磨的75%左右，随物料水分不同而变化，水分高、电耗节省的更多。
2.4 由于立式煤磨结构设计上的独有特点，它的磨辊直径要比同出力的其它中速磨的径大，从而工作时滚动阻力小，物料的碾入条件好，对提高磨机出力及降低能耗非常有利。
2.5 相对位置固定的三个磨辊与外加力的加载架之间用滚柱销相联，磨辊可在一定的范摆动（12—15°之间），使辊子在工作中能良好地适应料层厚度，入料粒度和碾磨件的磨损所带来的变化。由于立式磨的加载力是靠三个拉杆的垂直拉力加载，作用力均布，因此，磨辊及磨盘瓦的磨损均匀，这样能提高碾磨件的使用寿命，（相对于HP磨来说寿命提高25～30%）。
2.6 由于碾磨部件的作用力是静定支承系统传递，其碾磨力均匀作用于每个磨辊上，因此磨辊及磨盘瓦、减速机等受力件受力均匀、运行平稳、噪音较小，<85dB（A）。
译文
1、Working Principle of Vertical Coal Grinder
Vertical coal grinder belongs to roller coal grinder by externally force. The motor drives the millstone to revolve by means of main reducer, the revolving of the millstone drives three rollers to rotate (120°even distribution). The raw coal falls into the millstone via the inlet coal pipe and moves toward the outer edges of the millstone along the radial under the centrifugal force and evenly enters into the roller track of the millstone and mills between the roller and millstone tile. The entire millstone system is closed inside the central support. The milling pressure transfers to the foundation of the coal miller via the loading support on top of roller, three pulling rods and hydraulic cylinder. The shell of coal grinder doesn’t bear milling force. The milling pressure is provided by the hydraulic system and is subordinate to adjustment in accordance with coal varieties. The milling pressure and the deadweight of the milling parts are totally exerted on the reducer and transfers to the foundation via the reducer. Three rollers are distributed on the roller track of the millstone and are hinged on the loading support. The loading support and the roller support could swing by tilt of 12～15°along the radial via the rolling column, so that to adapt the variation of material layer and the angle variation caused by wearing between the roller and the millstone.
The hot air to transfer coal powder and dry raw coal enters into the coal grinder via the hot air inlet, and the hydrostatic pressure is transferred into dynamic pressure by means of the nozzle loop at the outer millstone, and the well-grinded coal powder is blown to the separator on top of coal grinder by the speed of 75～90m/s. At the same time, the drying of raw coal is completed by means of strong mixing movements. The raw coal not properly grinded is blown back to the millstone to be milled again. The iron blocks, gangue and other objects cannot be crashed in the raw coal fall into the hot air cabin at the bottom of the millstone and the objectionable objects are scraped to the waste material outlet by the scraper fixed on the millstone support and then fall into the scrap cabin, and is removed out of the millstone.
The qualified coal power up to the fine power requirements will be screened out after entering into the separator on top of coal grinder and will be conveyed to the coal powder cabin via the outlet pipe of separator. The rough coal powder will be conveyed back to the millstone through the bottom of the separator to be milled again.
2. The Structural Characteristics of S-Vertical Coal Grinder
2.1 The vertical coal grinder is a product developed and designed after digestion and absorption of the introduced technology, which has been applied to a large extent in cement, power, metallurgy and chemical industry of China with matured technology.
2.2 The coal grinder is applicable for extensive coal varieties, which cover blind coal with low ablation, subbituminous coal, soft coal, lignite with low moisture, etc;
2.3 The grinding efficiency and grinding energy consumption of the vertical coal grinder are greatly reduced, and the energy consumption of the coal powder grinder is only 50% -60% of the coal ball grinder; the unit electricity consumption of the entire coal powder grinder system is only around 75% of the coal ball grinder’s, which varies with the differences of moisture content in materials, and the electricity consumption is less for the materials with higher moisture content.
2.4 As for the unique characteristics of the vertical coal grinder’s structure, its roller diameter is larger than the roller diameter of other medium speed grinders with same output, and therefore the rolling resistance is small while working and the grinding conditions are favorable for the materials, hence is very beneficial to improve the output of grinder and to reduce the energy consumption.
2.5 The three rollers with relatively fixed position are coupled with the loading support of external force by roller pin, the roller could swing with a certain range (12-15°), the roller could favorably adapt to the thickness of material layer, the material granularity and the variation caused by wearing of milling parts in working. Because the loading force of the vertical coal grinder is loaded by the vertical pull of the three pulling rods with evenly distributed force, therefore, the wearing of roller and millstone tile is even and thus could increase the shelf life of milling parts (the shelf life could be increased by 25～30% as for HP).
2.6 Because the force of milling parts is transferred by static and fixed support system and the milling force is evenly exerted on each roller, therefore, the force is evenly exerted on the roller, millstone tile and reducer, etc, the running is stable and the noise is small, which is less than 85dB（A）.
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