Fan impeller repairing method and replica detection tool

Abstract

The invention discloses a fan impeller repairing method and a replica detection tool, and the repairing method comprises the steps: 1, carrying out profiling sampling on an arc-shaped region of a flow guide cone, and manufacturing a section sample plate; 2, manufacturing a standard template according to the cross section sample plate, and radially adding a gap area on the standard template to manufacture a clamp repairing and polishing template; 3, cutting, cleaning and polishing the corrosion and abrasion thinning area of the impeller blade, and carrying out additive remodeling; 4, carrying out reference processing on the impeller, and processing the excircles and the end surfaces of the inlet end and the outlet end of the impeller; fifthly, the two sides of the blade body of the blade are subjected to plier repairing and rough grinding forming; sixthly, the clamp repairing and grinding template is rotated, the three-dimensional arc-shaped outer circle of each blade is subjected to clamp repairing and grinding forming, and it is ensured that the arc shape of the clamp repairing and grinding template coincides with the outer arc of the blade; and 7, replacing the clamp repairing and polishing template with a standard template, and measuring whether the radial clearance value X between the outer circle of the impeller and the standard template reaches the standard or not. The impeller repairing efficiency can be improved, and the repairing method is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of equipment repair, in particular to a fan impeller repair method and a replica detection tool. Background technique [0002] Fans are mainly used in fertilizer, petrochemical, metallurgy and smelting industries. The impeller of the fan adopts a fully open, three-dimensional back-curved design, which improves the efficiency of the fan and prolongs its life. The life of the impeller determines the reliability of the whole machine. Increasing the blade thickness of the impeller is an effective way to improve the life of the impeller. The blades of the impeller are subjected to the combined action of corrosion and wear in actual operation, and the blades become thinner and corroded, which makes the gap between the blade and the side wall of the guide cone exceeds the standard. The height after thinning can be tens of millimeters lower than the standard height, which affects the air volume and wind pressure re...

AI Technical Summary

Problems solved by technology

Due to the special structure of the rotor impeller, the three-dimensional back-curved curve data of the impeller cannot be obtained. When the impeller blade is repaired, the matching guide cone must be sent to the repair manufacturer as the master of the blade pairing. Researching with diversion cones requires many people to operate, and the detection data is complicated, resulting in extended construction period and uncontrollable quality; generally, diversion cones cannot stay in the repair factory for a long time, and the manufacturer needs to install a spare machine for production, or even Cannot leave the manufacturer to repair the repair factory

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