Turbomachine Rotating Disk Groove Sequencing to Prevent Deformation
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Solution Overview
Problem
The existing methods for producing rotating disks for turbomachines face challenges in introducing profile grooves without causing deformation due to material removal and mechanical stressing, especially when the disk is weakened during the machining process.
Innovation Solution
The method involves introducing profile grooves in groups, where the first grooves are machined with sufficient disk material remaining between them to prevent deformation, and the second grooves are introduced with support from the first grooves, allowing for greater stability and reduced mechanical stressing, using techniques like broaching or erosive methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If profile grooves are introduced by removing material by machining, then manufacturing precision is improved, but the disk becomes weakened and deformed due to mechanical stressing
Solution Approach 1:
The method introduces profile grooves in a predetermined sequence, starting with grooves at positions where sufficient disk material is still present to provide mechanical support. This preliminary arrangement of grooves creates a stable structure that can support subsequent groove introduction without excessive deformation or weakening of the disk
Solution Approach 2:
The profile groove introduction process is divided into multiple sequential steps rather than being performed all at once. The disk is processed in stages, with grooves introduced at different circumferential positions in sequence, allowing the structure to maintain stability during each machining operation
2Productivity
If all profile grooves are introduced simultaneously, then productivity is improved, but deformation occurs due to insufficient disk material support
Solution Approach 1:
The method establishes a preliminary structure by first introducing grooves at positions that maintain disk integrity. This preliminary groove configuration serves as a stable framework that enables subsequent groove introduction while preventing the deformation that would occur if all grooves were introduced simultaneously
Solution Approach 2:
The groove introduction follows a periodic pattern where grooves are introduced at specific circumferential positions in alternating sequences. This periodic approach ensures that sufficient material remains between grooves to provide support, while still achieving complete groove coverage through repeated cycles
Data Source
AI summary
The present invention is directed to a method for producing a rotating disk for a turbomachine, forming blade root uptakes on a plurality of circumferential positions, for which, in each case, an axially extending profile groove that is bounded circumferentially by inner wall surfaces of the rotating disk is introduced on a respective circumferential position, in which production method, initially first profile grooves are introduced in a disk on first circumferential positions, and subsequently, a second profile groove is introduced in the disk on a second circumferential position located circumferentially between the first profile grooves.