【導(dǎo)讀】攪拌設(shè)備使用歷史悠久，應(yīng)用范圍廣。在化學(xué)工業(yè)、石油工業(yè)、建筑。行業(yè)等等傳統(tǒng)工業(yè)中均有廣泛的使用。攪拌操作看來似乎簡單，但實際上，它所涉及的因素卻極為復(fù)雜。在目前的建筑市場中,因偷工減料,導(dǎo)致混。凝土強(qiáng)度降低,不符合設(shè)計要求的事情屢有發(fā)生。建筑工程上需要占地面。積不大,成本不高,適合場地多變的混凝土攪拌設(shè)備。本文系統(tǒng)介紹了一。種labview控制,觸摸屏為人機(jī)接口的混凝土自動攪拌系統(tǒng)。行瀏覽、查詢、統(tǒng)計、打印等一系列管理功能。在電機(jī)控制系統(tǒng)設(shè)計中，供了不少的幫助。雖然此方法可行，但是由于線路復(fù)雜、制成后不易調(diào)整。且編程語言比較復(fù)雜，因此存在一定的局限性?；谶@個思想，本系統(tǒng)采用美國NI公司的LabVIEW圖形化編程語言，構(gòu)建了對交流電機(jī)轉(zhuǎn)速進(jìn)行在線實時測量與控制的系統(tǒng)。不同的測試軟件來構(gòu)成任何一種儀器。采用虛擬儀器，有以下幾個優(yōu)點(diǎn)：。而且其編程簡單、圖形顯示功能強(qiáng)大，并且具有開放性、模塊化、可。和數(shù)據(jù)采集等領(lǐng)域。

　　

【正文】 es to equipment design of agitator in chemical production, mainly to solve the problem of the design, the equipment in chemical production include: agitator selection, motor and reducer selection, support device design, shaft seal, selection and setting tank design, and draw the corresponding equipment History and development status of agitator Mixing equipment is widely used as a kind of fluid machinery products, wide variety, suitable for chemical industry, metallurgy, medicine, food and feed industries. Mixing operation is an important link in the industrial process, which 山東科技大學(xué) 44 involves fluid mechanics, heat transfer, mass transfer and chemical reactions and other processes, and the stirrer is in order to make the mixing media device is suitable for the flow field and the input mechanical energy to it. The mixer is also called Mixer, or Agitator, Stirrer. Also includes the solid particles suspended in the solution or the solution into emulsion evenly stirred broad, it includes the disperser and homogenizer. Some stirrer can produce shear force greatly, to obtain refined particle colloid mill more than 10 times larger than the submicron suspension, therefore, can be used for fine food and chemical manufacturing, cosmetic cream, salad sauce. Petrochemical industry is monly used in polyvinyl chloride alloy, CIS polybutadiene rubber in autoclave, autoclave, stripping vessel, collectively referred to as the mixing vessel (Agitatored Vessels, or Stirred Vessels).Stirrer and stirring container in device of economies of scale and diversification of varieties at the same time, it bee more and more large. Since Hitachi production since 1949 the production of stirred tank reactor for terephthalic acid, polyvinyl chloride, styrene monomer, the polypropylene unit production of the stirred tank reactor near 4000, the maximum capacity of the container to 576m, maximum diameter of 7620 cylindrical part mm, the maximum length of making 44380 mm design pressure, maximum 28 the design of MPa, the highest temperature making 530 cI two, motor power up to 1100 kW. Based on the requirements of the development of energy saving, variable frequency motor, seal small shear resistance blade, with new sealing instead of mechanical seals and packing, with magic drive instead of mechanical transmission. Reduce product cost, reduce the cost of the overall repair and maintenance and improve equipment repair requirements based on the average time interval, greatly improving the service life of equipments. To meet the health and reduce the cleaning and sterilization costs based on the requirements, implementation of the CIP (clean in place) and SIP (in situ sterilization), improve the level of automation, avoids human contact with the product, reduce manual operation and standby time, greatly improving the product39。s health level. The main types of agitator and its development According to the stirrer shape can be divided into straight blade turbine type, open type, push type, disk turbine type, anchored, spiral, spiral type。 according to the different liquid viscosity can be divided into low viscosity fl uid mixer, medium high viscosity liquid agitator. Low viscosity fluid mixer, such as: trefoil push type impeller, blade paddle (2 to 60 percent off leaves), 6 straight blade turbine type, super hybrid impeller type (HR]O0, HV200),。 high viscosity liquid mi xer such as: anchored, screw impeller, double helical ribbon impeller type, 山東科技大學(xué) 45 super mixing agitator (MR205305) etc.. In order to achieve high precision, high quality requirements, in foreign countries, especially Japan developed a stirring device model, in order to meet the need of production of high viscosity products. Such as the inverted conical spiral wing type mixer, mixer, ultra high performance floating stirred tank, super vibration alpha type agitator. In the mixing operation to the material, the people hope to realize various agitation purpose, so to understand the characteristics of various stirrer impeller type, choose appropriate, design stirrer with flow characteristic is very important. In a stirred tank of liquid to flow characteristics of threedimensional flow, in order to distinguish the stirring blade discharge, according to the main drainage direction, according to the cylindrical coordinate the typical blade into radial flow impeller and axial flow impeller. Tooth type, flat leaf pulp type, straight blade disk turbine type and the curved blade turbine type in Unbaffled Stirred Tank in addition to make the liquid to produce a rotating together with the impeller circumferential flow, also due to the centrifugal impeller is along the blade to the tank wall liquid injection, forming radial strong making strong flow, so these the impeller is a radial flow impeller. Radial flow impeller agitator rotates, the material is axial suction and radial impeller discharge, large power consumption, stirring speed, shear strength. As shown in Figure 3, shown in Figure 4, is a typical radial flow impeller. 山東科技大學(xué) 46 In the turbulent state, promote the impeller in addition to produce circumferential flow, also have a large number of axial flow, is typical of the axial flow impeller. The blade turbine impeller pared with straight blade turbine and curved blades impeller axial flow turbine, more ponents, used for axial flow. Ribbon and screw impeller made of high viscosity material produce axial flow, also is the axial flow impeller. Axial flow impeller agitator no partition cycle, unit power generation flow, shear rate is small and evenly distributed on the blade near a large range, with a strong maximum anti off current capability. As shown in Figure 5, Figure 6 shows, is typical of the axial flow impeller. Under normal circumstances, mixing equipment widely used in hy