我国目前生产的各种型号电度表,下轴承都是采用宝石结构。我厂试验室曾对用户运行5年的电度表,进行基本误差测试,结果有30%～40%的表在轻负荷时严重超差,这种误差主要是下轴承的磨损所造成的。因此,使用磁力轴承是实现电度表长寿命的关键。磁力轴承分为磁悬轴承和磁推轴承,磁悬轴承由于结构和加工工艺问题,很少应用,普遍应用的是磁推轴承。磁推轴承是利用两块环状磁体同性相斥原理,用推力支撑起电度表的转盘,为克服侧向的偏转,在 China’s current production of various models of meters, the bearings are used gem structure. I plant the laboratory had the user to run the 5-year meter, the basic error test, the results of 30% to 40% of the table at light load serious over-tolerance, this error is mainly caused by the lower bearing wear. Therefore, the use of magnetic bearings is the key to achieving a long life meter. Magnetic bearings are divided into magnetic bearings and magnetic thrust bearings, magnetic suspension bearings due to structural and processing problems, rarely used, the general application of magnetic thrust bearings. Magnetic thrust bearing is the use of two ring magnet homosexual repellent principle, thrust propulsion meter from the dial, to overcome the lateral deflection, at