1存在的问题在三聚氰胺装置中,熔盐泵介质为430℃高温熔盐,采用悬臂立式液下结构,流量1 100 m~3/h,扬程40 m,转速1 470 r/min,功率315 k W,轴径Φ110 mm,轴总长3.8 m,悬臂长度2.6 m;靠叶轮端部有下轴套和轴衬,轴套采用不锈钢材质,轴衬为黄铜材质。该泵使用1个月后,发现振动异常,管道出口振动加剧,被迫停机倒换泵。经检 1 problems In the melamine plant, the molten salt pump medium is 430 ℃ high temperature molten salt, using a vertical cantilever liquid structure, the flow rate of 1 100 m ~ 3 / h, lift 40 m, speed of 1470 r / min, power 315 k W, shaft diameter Φ110 mm, shaft length 3.8 m, cantilever length 2.6 m; by the end of the impeller under the shaft sleeve and bushings, stainless steel shaft sleeve, bushing brass. The pump used 1 month later, found that abnormal vibration, pipe outlet vibration increased, forced to stop switching pump. After the inspection