特种磁脂密封的寿命试验研究  

Experimental Research on Operation Life of Special Magnetic Grease Seal

作　　者：吴露[1] 张秋翔[1] 蔡纪宁[1] 李双喜[1] 李岚[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《润滑与密封》2013年第5期60-63,74,共5页Lubrication Engineering

基　　金："十二五"国家科技支撑计划项目(2011BAF09B05)

摘　　要：针对大直径、大间隙工况下大型电机蒸发冷却技术中特种磁脂密封的可靠性问题,设计一种特种磁脂密封试验装置,通过试验研究磁脂填加量、转轴转速、密封间隙、冷却水流量以及密封级数对磁脂密封寿命的影响。结果表明:相同密封承压能力下,降低磁脂填加量、增大密封间隙对提高密封寿命起到显著作用。磁脂密封在一定转速范围内性能稳定,运转寿命无明显变化;当转速超过稳定范围时,随转速的增大,磁脂密封寿命将逐渐降低。增大冷却水流量、增加密封级数能有效提高磁脂密封寿命,但冷却水流量过大对密封寿命提高不明显,而密封级数则会受到密封轴向尺寸限制,为此在二者参数的选取上应给予综合考虑。Aimed at the seal reliability problems of special magnetic grease in large motor evaporative coohng technolo- gy under the working condition of large diameter and clearance, an experimental device for special magnetic grease seal was designed. The effects of magnetic grease filling dosage, shaft speed, seal gap, cooling water flow and seal series on the seal life were researched through operation tests. The results show that the seal life of special magnetic grease can be im- proved by reducing filling dosage of magnetic grease and increasing seal gap under the same seal bearing capacity. The seal life of special magnetic grease has no obvious change with stable performance within certain range of the speed. Wheh out of the speed, the seal life is gradually reduced with increasing of the speed. The seal life of special magnetic grease can be improved effectively by increasing the flow rate of cooling water and increasing seal series. But the seal life can not be obvi- ously increased with too much of the water flow, and the seal series is limited by the seal axial size. Therefore, comprehen- sive consideration should be given in the selection of these two parameters.

关 键 词：特种磁脂 密封寿命 密封 

分 类 号：TB42[一般工业技术]