Optimal Design Of MPS Medium Speed Coal Mill And Its Software Development

Northern Heavy Industries Group Co. Ltd has introduce Babcock company’s MPSmedium-speed coal mill technology, the introduction of MPS medium-speed coal millall design, manufacturing and testing technology and test selection for mill a full set oflaboratory equipment, to meet the needs of pulverized coal for the power plant. As thecountry promoting new type medium speed coal mill technical innovation and designoptimization, to meet the market demand of the power plant, Northern heavy industrygroup Co, Ltd in the digestion and absorption of imported technology basis,successfully developed a series of MPS medium-speed coal mill, power technologyequipment is homebred change a major breakthrough, to complete the replacement offoreign similar imported products and adjust the national power plant structure has veryimportant significance.Coal grinding machine mainly depend on two working surface or medium betweenthe extrusion and friction between the coal grinding into fine products. The mainproducts are:1.the MPS280medium speed coal grinding machine is mainly composed of a mainmotor, main reducer, grinding disc, grinding roller group, a frame body, tensioningdevice, separator, installing and repairing device, auxiliary transmission device andsealing air pipe torque supporting components. Has higher grinding efficiency, greatlyshortened technological process, low power consumption. Coal grinding in a definedunder pressure. Grinding roller, grinding disc are directly involved in the componentnumber of blocks is assembled and replaced, abrasive member made of wear resistancematerials. Grinding roller and the grinding disc lining board can use the hydraulicdevice to mill outside repair or replacement. Grinding roller lining board can turn overuse, prolongs the service life of the grinding component.2.transformation of the lower frame body seal ring structure, completely solve theleakage of powder in the separator; transmission firstly adopts the belt drive to replacegear transmission, greatly reduces the weight, the use of more convenient.3.The MPS medium speed coal grinding machine, grinding disc lining board andthe seat through the coal, is a key force components, influence the whole life. On MPS290medium speed coal mill grinding block and related structure finite element analysis has important guidance meaning to design. The structural finite element analysissoftware using COSMOS, modeling using feature based parametric solid modeling forlarge software Solidworks. Through the MPS series roller mill has the main componentsof the finite element calculation, can be seen in various parts of the design to meet therequirements of strength. Among them, disc seat strength generally too large, can beproperly reduced parts dimensions, such as reducing the wall thickness and thethickness of the stiffener, reducing its weight, to make it more optimization. Rollerbracket may be appropriate to change the arm root fillet, in order to reduce stressconcentration effect. The pressure frame may be appropriate to increase the lower platenloading area, to reduce the stress.4.The use of VisuaBasicdevelopment and design of computer aided MPS mediumspeed coal grinding machine design calculation software. By using the idea of object-oriented program architecture.