The present invention discloses a vacuum classifier for powder processing, including a grading shell, a graded impeller, a pulverized chamber and a spindle. The hierarchical shell is a grading chamber, a powder chamber is above the grading chamber and a powder outlet is provided in the pulverized chamber; the graded impeller is located in a grading chamber and is fixed in the lower part of the spindle, and the graded leaf is arranged. The upper steel plate of the wheel is a narrow edge flange, and the lower end face of the pulverized chamber is equipped with a sealing groove suitable for the flange, and the sealing groove is provided with 2 or more pressure relief holes evenly distributed along the circumference, the pressure reducing hole is connected with a circular air passage, and the circular circular airway is communicated with the air through an air filter. The invention can meet the needs of ultra-fine and accurate classification, with high classification efficiency, low unit energy consumption, stable performance, long service life, 400~1250 mesh size range, easy to use maintenance and speed control control, thoroughly solve the problem of powder grinding, and the distribution range of the finished product is narrow.
【技术实现步骤摘要】
一种减压分级机
本专利技术涉及粉体加工设备,具体为一种减压分级机。
技术介绍
分级机是摆式磨粉机中保证产品细度的关键部件,传统磨粉机采用单层轴流风扇式直叶片分级机,这种传统结构的磨粉机可加工粒径范围局限为80~325目的粗细粉;如采用涡轮分级机,由于出粉口密封槽下端面与分级叶轮上端面的间隙大、路径短,易造成粉尘大颗粒物泄漏,如要生产细度更高的粉体,则需要提高转速,极易造成粉体过磨,都无法实现超细精确分级。
技术实现思路
本专利技术的目的是为了克服上述现有分级机的不足,而为公众提供一种分级效率高、单位能耗低、整机性能稳定、使用寿命长和可加工粒径范围为400~1250目的减压分级机。实现本专利技术采用的技术方案是:一种减压分级机,包括分级壳体、分级叶轮、出粉室和主轴,所述分级壳体内为分级室,所述分级室上方为出粉室,出粉室设有出粉口,主轴穿设在出粉室与分级室中央,主轴从出粉室上方伸出与动力机构连接;所述分级叶轮位于分级室内且固装在主轴下部,所述分级叶轮的上层钢板为一窄边法兰,出粉室的下端面设有与所述法兰适配的密封槽,与现有技术不同的是,所述密封槽上开设有2个以上沿圆周均匀分布的减压孔,所述减压孔与一环圆气道连通,所述环圆气道通过空气滤清器与大气相通。所述环圆气道为矩形环圆气道。所述分级叶轮为鼠笼式叶轮。分级叶轮由大量叶片与上、中、下三层钢板及轴套组焊而成,分级叶轮的上层钢板的窄边法兰在密封槽内高速旋转产生的高压气流借设置的减压孔得以释放,形成阻隔区层,阻挡粉尘大颗粒物从此处进入分级机内部,具有极强的密封作用。本专利技术可以满足超细精确分级的需要,而且分级效率高、单位 ...
【技术保护点】
1.一种减压分级机,包括分级壳体、分级叶轮、出粉室和主轴,所述分级壳体内为分级室,所述分级室上方为出粉室,出粉室设有出粉口,主轴穿设在出粉室与分级室中央,主轴从出粉室上方伸出与动力机构连接;所述分级叶轮位于分级室内且固装在主轴下部,所述分级叶轮的上层钢板为一窄边法兰,出粉室的下端面设有与所述法兰适配的密封槽,其特征在于,所述密封槽上开设有2个以上沿圆周均匀分布的减压孔,所述减压孔与一环圆气道连通,所述环圆气道通过空气滤清器与大气相通。
【技术特征摘要】
1.一种减压分级机,包括分级壳体、分级叶轮、出粉室和主轴,所述分级壳体内为分级室,所述分级室上方为出粉室,出粉室设有出粉口,主轴穿设在出粉室与分级室中央,主轴从出粉室上方伸出与动力机构连接;所述分级叶轮位于分级室内且固装在主轴下部,所述分级叶轮的上层钢板为一窄边法兰,出粉室的下端面设有与所述法...
【专利技术属性】
技术研发人员:黄海,易辉润,
申请(专利权)人:桂林欣新机械有限公司,
类型:发明
国别省市:广西,45
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