Hydro Turbine Top Cover Repair With Automated Grinding and Cladding
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Solution Overview
Problem
The traditional method for repairing hydro turbine top covers involves high labor intensity, poor working environment, and high safety risks due to manual grinding and welding, with unsatisfactory quality and accuracy.
Innovation Solution
A device comprising a rotating support base, connecting arm, movable frame, and machining assembly, which enables automated processing of the top cover using interchangeable tools for grinding, laser cladding, and arc additive processes, ensuring high-quality and precise repairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional manual grinding and welding methods are used, then the repair process is simple and equipment requirements are low, but labor intensity is high, working environment is poor, and safety risks are high
Solution Approach 1:
The repair device is divided into multiple independent modules including a rotating support base for positioning, a movable frame for holding tools, and interchangeable machining assemblies for different repair operations. This modular segmentation allows automated repair while keeping each module relatively simple and manageable.
Solution Approach 2:
The device employs interchangeable machining assemblies that can perform multiple functions including grinding, laser cladding, and arc additive manufacturing. This multi-functionality reduces the need for multiple separate devices while maintaining automation benefits.
2Manufacturing precision
If traditional manual repair methods are used, then equipment investment is low, but welding quality and grinding effect are unsatisfactory with low flatness and large accuracy errors
Solution Approach 1:
Manual mechanical grinding and welding operations are replaced with automated machining assemblies including precision grinding tools, laser cladding devices, and arc additive manufacturing equipment. These automated systems provide consistent high-precision results with controlled parameters.
Solution Approach 2:
The repair process transitions from manual operations with variable human-controlled parameters to automated processes with precisely controlled parameters including grinding speed, laser power, arc current, and tool positioning accuracy, ensuring consistent high-quality results.
3Productivity
If manual repair operations are performed, then equipment requirements are simple, but labor intensity is high and safety risks are high
Solution Approach 1:
The device incorporates self-positioning capabilities where the rotating support base automatically orients the top cover, and the movable frame with measuring systems automatically positions the machining assemblies, reducing the need for continuous manual intervention and increasing productivity.
Solution Approach 2:
A control system acts as an intermediary between operators and the complex machining assemblies, allowing simple operation of sophisticated equipment through centralized control interfaces that manage the various automated functions.
4Reliability
If traditional repair methods are used, then the process is straightforward, but the top cover remains in extensive damaged areas with deep cavitation and large maintenance workload
Solution Approach 1:
The device performs preliminary assessment using integrated measuring systems to map damaged areas and cavitation depths before repair, allowing precise planning of repair strategies and ensuring all damaged areas are addressed systematically.
Solution Approach 2:
The repair process utilizes composite repair techniques combining traditional welding with advanced materials including laser-clad coatings and arc-additive manufactured reinforcement structures, creating multi-layer composite repairs that enhance durability and reliability in highly stressed cavitation zones.
Data Source
AI summary
A device for repairing a top cover of a hydro turbine by adding or removing materials includes a rotating support base, a connecting arm, a movable frame, and a machining assembly. The rotating support base includes a base and a rotating seat disposed on the base, a driving assembly is disposed on the base, and an output shaft of the driving assembly is drivably connected to the rotating seat. An end of the connecting arm is connected to the rotating seat, and the other end of the connecting arm is connected to the movable frame. A lifting plate is disposed on the movable frame, a sliding table assembly and a measuring system are disposed on an upper side of the lifting plate. A swivel seat is disposed on an upper side of the sliding table assembly, and the machining assembly is detachably mounted on the swivel seat.