Underwater bearing of flush slag stirring cage machine and sealing device of underwater bearing

Abstract

The invention discloses an underwater bearing of a flush slag stirring cage machine and a sealing device of the underwater bearing, and belongs to the technical field of stirring cage machines. The underwater bearing comprises three stages of sealing structures. A combined labyrinth seal serves as the first stage, that is, a sealing seat is fixed to a bearing pedestal, and an inverted sealing cup is fixed to a shaft sleeve; and a clearance between the inverted sealing cup and the sealing seat is sealed through a labyrinth sealing ring. A mechanical seal serves as the second stage, that is, a moving ring is fixed in a moving ring support, the moving ring support is pressed by a spring, and the moving ring support is arranged in the inverted sealing cup; and a static ring is fixed in a static ring support, the static ring support is arranged in the sealing seat, a spindle of the stirring cage machine drives the moving ring support to rotate, and then the moving ring is driven to rotate relative to the static ring. A combined frame oil seal serves as the third stage and comprises the multi-layer combined dual-lip frame oil seal. The underwater bearing is sealed, and therefore the service life of the bearing is prolonged to one year or above from three months, the equipment maintenance amount is relieved, production cost is reduced, and the underwater bearing can be suitable for similar work conditions decreased the fields of smelting, chemical engineering and the like.

Description

technical field [0001] 本发明涉及搅笼机技术领域,更具体地说,涉及一种水冲渣搅笼机水下轴承及其密封装置。 Background technique [0002] 冶炼生铁时,明特法高炉水冲渣处理系统具有设备布置紧凑,占地面积小,节能环保的特点,因而在钢铁冶炼企业进行高炉熔渣处理系统中被普遍使用,其核心设备就是搅笼机,搅笼机通过控制倾斜深入放置在水渣池里的螺旋叶片连续旋转,不断把经过水力冲制形成的水渣向上输送,在螺旋上升的过程中实现渣水分离,得到极高经济价值的干渣原料。 [0003] 搅笼机主轴尾轴承必须沉入水渣池底进行工作,其工作环境恶劣,水汽温度接近100℃,渣池里含有大量粒化渣,主要成分为二氧化硅、氧化钙、氧化镁等硅酸盐和铝酸盐,颗粒细微,硬度极高,一旦进入主轴轴承里,极易被嵌入轴承表面,短时间内就会使锡青铜轴承套和轴颈发生严重磨损;另外,脂润滑轴承的工作条件也不允许有水汽渗入,否则,很快会稀释轴承润滑脂,使轴承无法正常工作。 [0004] 搅笼机水下轴承一直是关系到高炉水渣搅笼机使用寿命的一大关键难题,尤其是随着人们环保意识的不断加强,高炉水渣搅笼机已越来越多地被钢铁企业广泛采用,高炉水渣搅笼机水下轴承的质量,尤其是使用寿命直接关系到高炉水渣搅笼机的经济效益和社会效益,为此,高炉水渣搅笼机用户都急于寻找一种既经济又耐用的新型水下轴承。 [0005] 然而,现役设备搅笼机的水下轴承密封结构多采用迷宫密封圈密封,还有一些其他类型的阻隔密封,所谓迷宫密封圈密封即在密封槽里镶嵌2~3道迷宫密封圈,此种密封结构在高炉水渣池里无法保证既耐高温又耐磨损,且不具有跟随性,往往使用1~2个月就会出现传动间隙,而一旦转轴和轴套之间产生间隙,泥沙和水即会渗入轴承内部,加剧内部轴承磨损直到损坏,使得水下轴承最多3~4个月就要更换,设备维修频繁,更换备件成本高,严重影响生产。 [0006] 经检索,中国专利申请号200920004085.5,申请日为2009年2月1日,发明创造名称为:一种新型水下轴头;该申请案的法兰通过键联接轴和轴套,经过轴承作相对于轴承端盖、轴承座、密封盖和压盖的转动,在密封盖与轴套间隙内装有弹簧,压环、密封环和支承环,弹簧一端作用于压盖,另一端作用于压环,使密封环和支承环始终填满密封盖与轴套间的转...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the existing underwater bearings cannot be reliably sealed, the present invention provides an underwater bearing of a water flushing slag mixing machine and its sealing device; the present invention adopts a three-stage seal combining a combined seal and an improved mechanical seal This method seals the underwater bearing, which increases the service life of the bearing from three months to more than one year, which greatly reduces the amount of equipment maintenance, reduces production costs, and significantly improves production efficiency. It is suitable for smelting, chemical and other fields similar underwater sealing

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