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当前位置: 长篇儿子与母亲乱小说 > 新闻动态 > 【行业】新闻 来解决不锈钢反应釜搅拌轴偏心问题
来源:切片机厂家 时间:2018-05-11 点击量:
1:不锈钢搅拌反应釜是化工、石油化工领域生产过程中必不可少的承载压力容器。不锈钢搅拌反应釜是由不锈钢反应釜的釜体、搅拌传动装置、搅拌器等共同组成动力由搅拌传动装置传递到搅拌轴,搅拌轴带动搅拌器运转达到搅拌介质物料完成各种化工工艺要求其中搅拌轴呈悬臂梁式结构,这样便于安装、维护、减少介质腐蚀造成的影响某【公司】生产的一台大型搅拌反应釜.因搅拌轴悬臂过长,搅拌器的直径大。所需的功率大,搅拌轴承受的扭力大,同时搅拌的离心力的作用也随即增加,出现了搅拌轴扭曲、搅拌轴摆动量超过轴封处允许范围引起搅拌反应釜轴封破坏等现象。造成停车检修。【设备】在进行图纸设计时,在搅拌轴的下端与反应釜的釜底之间设置了三足式底支撑,为了改善反应釜搅拌轴的支撑条件.减少搅拌轴的挠度,保证轴的径向偏摆量在允许范围内运转但是在实际使用过程中,效果却不理想。
2解决方法
底支撑按不同的方式可以分为三足式、底部法兰式、迷宫式、可拆式,主要采取转动套与固定套之间的滑动运行方式增设底支撑改变了搅拌轴的支撑条件.同时也增加了搅拌轴的支点。这样就对底轴承的安装提出很高的要求。安装不好会加大偏心,加剧上下轴承的磨损并产生振动,另外当底轴承在反应介质中利用液态介质润滑。但当存在固体小颗粒时,会进入底轴承内造成该轴承的磨损、堵住咬死针对现有技术中的不足,提出一种结构简单、工作可靠、耐腐蚀、耐高温、耐磨损、安装方便适用于搅拌反应釜内的底支撑并实施更改施工。底支撑结构由内陶瓷轴、外陶瓷环构成支撑体的运转部件;由支撑体架、接触轴体、密封压盖共同固定陶瓷元件.起到密封、固定、支撑的作用,同时也克服了陶瓷元件易碎的弊端。由调节垫来调节外陶瓷环的高度,增加内陶瓷轴、外陶瓷环6的接触面积。由以上部件构成此底支撑的行星式结构的一个支点,依据搅拌反应釜的大小、搅拌轴的转速和直径的大小,选择行星式结构的支点数量,形成三角、四方、五角、六点等不同的支撑形式,搅拌轴安装于此支撑内,底支撑通过底支撑底板3固定于反应釜釜体上实现防止搅拌轴摆动的功能避免搅拌轴的径向摆动量超过了搅拌轴密封件处的允许径向偏差,起到底防摆的作用保证使用该装置的搅拌反应釜安全运转,具有无需润滑的底部支撑装置,利用陶瓷的耐磨性能,提高底支撑的使用寿命,同时行星式结构更适用于含有固体料的反应介质的场合。
3结语
经过改造底支撑的【设备】重新投产使用。经过6个月的运行,【设备】运转平稳可靠,证明这是一种结构简单、工作可靠、耐腐蚀、耐高温、耐磨损、安装方便的适用搅拌反应釜内的行星式陶瓷底支撑。由内陶瓷轴与外陶瓷环构成此底支撑的行星式结构的一个支点.通过调节由内陶瓷轴与外陶瓷环等构成的支点的位置使搅拌反应釜的搅拌轴与其同心运转,避免搅拌轴的偏心运动,较好的解决了大型反应釜悬臂轴底支撑的问题。
英文版:
1 Stainless steel stirred tank reactor is an indispensable bearing pressure vessel in the process of chemical industry and petrochemical industry. Stainless steel mixing reactor is the kettle, stainless steel reactor stirrer stirring transmission device, composed of power by the stirring transmission device is transferred to the stirring shaft and the stirring shaft drives the agitator operation to complete all kinds of material mixing medium chemical process requirements including stirring shaft is cantilever structure, easy installation and maintenance, this effect resulted in the decrease of medium the corrosion of a company's production of a large reactor. Because of the cantilever agitating shaft is too long, the large diameter of agitator. The power required, bearing large torque stirring, centrifugal force and stirring effect also increased, the stirring shaft is twisted, the stirring shaft swing over the shaft seal range caused by stirring reactor shaft destruction phenomena. Cause parking overhaul. Equipment in the design drawings, between a lower end of the stirring shaft and the bottom of the reaction vessel is provided with three feet at the end of support, in order to improve the supporting conditions of reactor stirring shaft. To reduce the deflection of the agitating shaft, ensure the shaft deflection in operation within the allowable range but in the process, the effect is not ideal.
2 solutions
At the end of support in different ways can be divided into three foot, bottom flange, labyrinth, detachable, mainly adopts the rotary sleeve and the fixing sleeve between the sliding mode with bottom support changed the supporting conditions of agitating shaft. At the same time also increased the fulcrum of the agitating shaft. In this way, the installation of the end bearing is very high. The installation is not good will increase the eccentricity, the upper and lower bearing wear and vibration, in addition to the bottom bearing in the reaction medium using liquid medium lubrication. But when there are solid particles, will enter the bottom bearing caused by wear, the bearing block and killed for the shortage of the existing technology, put forward a kind of simple structure, reliable work, high temperature resistance, corrosion resistance, abrasion resistance, convenient installation, suitable for stirring in the reaction kettle bottom support and change the construction. The bottom supporting structure comprises an inner ceramic shaft, ceramic ring running parts supporting body; by supporting frame, contact shaft seal gland common fixed ceramic components. To seal, fixing and supporting role, but also overcomes the disadvantages of brittle ceramic element. The height of the outer ceramic ring is adjusted by the adjusting pad, and the contact area of the inner ceramic shaft and the outer ceramic ring 6 is increased. From the above components form a fulcrum planetary structure of the bottom supporting the basis of the reactor size, stirring speed and shaft diameter, select the number of pivot planetary structure, forming a triangular and square, five six point angle, different support forms, the stirring shaft installed on the support. At the end of support 3 is fixed to the reactor body to prevent the stirring shaft swing function to avoid radial swing momentum over the stirring shaft of the stirring shaft permitted radial deviation of the sealed position through the bottom plate, plays a role in avoiding swing operation to ensure safe use of the stirred tank reactor device, support device with no lubrication. At the bottom, the wear resistance of the ceramic, improve the service life of the bottom support, and planetary structure is more suitable to the reaction medium containing solid material.
3 conclusion
After the transformation of the bottom support equipment to re put into operation. After 6 months of operation, stable and reliable operation of the equipment, this proved to be a simple structure, reliable work, corrosion resistance, high temperature resistance, abrasion resistance, convenient installation and is suitable for stirring planetary ceramic reactor bottom support. The ceramic shaft and the outer ceramic ring form a fulcrum of planetary support structure of the bottom. By adjusting the fulcrum from the ceramic shaft and the outer ring of the ceramic position of the stirring shaft concentric with the operation of the reactor, avoid the eccentric motion of the agitating shaft, solves the problem of large cantilever shaft reactor at the end of support issues.
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