On-line laser reinforcing device for hydraulic turbine blades

Abstract

The invention provides an on-line laser reinforcing device for hydraulic turbine blades. The on-line laser reinforcing device comprises a track, a traveling mechanism, a robot and laser cladding complete equipment; and the annular track is arranged in a rotating wheel chamber of a hydraulic turbine, the traveling mechanism is arranged on the track, the robot is connected with the traveling mechanism, the laser cladding complete equipment is connected with the robot, the traveling mechanism is pushed to move along the track to drive the robot to arrive at the operation area, and the robot controls the laser cladding complete equipment to repair the cladding part. According to the on-line laser reinforcing device, the problems that in the traditional electric-arc welding defect repair process of original hydraulic turbine blades, the heat effect on substrates is large, the binding strength is low, the thickness is not easily controlled, environmental protection is not achieved, the operation space is large, and the repairing efficiency is low are solved; and the on-line laser reinforcing device has the characteristics of being simple in structure, small in heat effect on substrate, high in binding strength, controllable in thickness, environmentally friendly, capable of being suitable for small space operation, high in repairing efficiency, and easy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of water turbine local defect repair and strengthening, and relates to an online laser repair and strengthening device for water turbine blades. Background technique [0002] The turbine blade is an important flow-passing part and a key part of energy conversion in a hydro-generator set. During long-term operation, due to the combined effects of cavitation and erosion, it has serious size reduction, pitting, perforation, and cavitation. In serious cases, it will affect the normal and stable operation of the unit and cause economic losses. In order to ensure the normal operation of the equipment, according to the regulations, it should be inspected and maintained regularly. In the surface enhancement and repair technology of turbine blades, the current common methods are traditional arc surfacing, plasma spraying, supersonic spraying, etc. Among them, the traditional arc surfacing technology has a greater th...

AI Technical Summary

Problems solved by technology

In the surface enhancement and repair technology of turbine blades, the current common methods are traditional arc surfacing, plasma spraying, supersonic spraying, etc. Among them, the traditional arc surfacing technology has a greater thermal impact on the base material, and the dilution rate of the base material is higher. It is easy to cause blade deformation, and the custom-made electrodes commonly used in arc welding cannot carry out targeted improvement and enhancement of surface properties, have a large thermal impact on the substrate, and reduce the bonding performance with the substrate; the bonding strength of the coating obtained by spraying technology and the substrate is poor , prone to peeling off and other phenomena, can not significantly improve the wear resistance and cavitation resistance, is not environmentally friendly and has a high risk of construction safety, the spray protection method takes up a lot of space, is inconvenient to operate, low in automation, and low in repair efficiency. limited ability

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