Novel thermal spraying water seal shaft sleeve and application thereof

The invention provides a thermal spraying water seal shaft sleeve, the water seal shaft sleeve comprises a specially-made multi-line thread, and the surface of the water seal shaft sleeve is coated with a composite layer in a spraying mode. The composite layer is prepared from, by mass, 9%-11% of cobalt, 3.5%-4.5% of chromium, 0.01%-0.5% of iron and the balance carbon-containing tungsten, and the mass percentage of carbon in the carbon-containing tungsten is 5%-10%. The surface of the water seal shaft sleeve coated with the composite layer has high Vickers hardness, the corrosion resistance and impact resistance of the dredge pump can be effectively improved, the service life of the dredge pump can be effectively prolonged, and normal operation of a water seal system of the dredge pump is guaranteed. 本发明提供了一种热喷涂水封轴套，水封轴套上包括有特制的多线螺纹，水封轴套表面喷覆有复合层。复合层的制备原料按照质量百分比包括9-11％钴，3.5-4.5％铬，0.01-0.5％铁，余量为含碳钨，含碳钨中碳的质量百分含量为5-10％。覆有本发明所述的复合层的水封轴套表面有较高的维氏硬度，能够有效提高泥泵的耐腐蚀性和耐冲击性和使用寿命，保证泥泵封水系统正常运行。