The invention discloses a
repair method for severe wear of a wear ring of an
impeller of a single-suction
centrifugal pump, which comprises the following repair steps of: S1, dismounting the worn
impeller from a pump body, and flattening the worn wear ring of the
impeller by using a lathe; s2, the outer
diameter size of the impeller wear ring and the inner
diameter size of the
volute wear ring after finishing are measured, and a gap between the impeller wear ring and the
volute wear ring at the present stage is obtained; s3, selecting a steel
pipe with a proper size according to the size of the gap at the current stage, measuring the width of the position of the impeller wear ring,
machining the inner part and the outer part of the steel
pipe by using a lathe, and ensuring that the machined inner part of the steel
pipe can be arranged in the flattened position of the impeller wear ring; and S4, the machined steel pipe is heated and inlaid in the position of the impeller wear ring,
interference fit is kept, and the grown steel pipe is
cut off through a lathe after cooling. The abraded impeller wear ring can be repaired to the original state according to the requirement for the gap between the impeller wear ring and the pump body
volute wear ring of the single-suction centrifugal water pump and the material requirement, and the original efficiency of the water pump is achieved.