Rotor Blade Removal Frame for Tight Disk Spacing
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Solution Overview
Problem
The existing removing device for rotor blades in axial flow rotary machines is limited by the requirement for a specific distance between the rear end surface of the upstream-side disk and the front end surface of the downstream-side disk, making it unusable when this distance is smaller than a predetermined value.
Innovation Solution
A rotor blade removing device with a pushing-out mechanism and a frame that allows the device to be positioned on the disk even when the distance between the disk end surfaces is short, by utilizing a reaction force receiving portion to prevent movement in the axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the removing device is disposed between two disks with a specific distance requirement, then the device can be properly supported and operated, but the device cannot be used when the distance between disk end surfaces is smaller than the predetermined distance
Solution Approach 1:
The invention changes the support dimension from axial (between disks) to radial (on the disk surface). The support portion is disposed on the disk instead of between disks, allowing the removing device to function regardless of the axial distance between disks. This dimensional shift resolves the contradiction by making the device applicable to disks with small axial spacing.
Solution Approach 2:
The invention extracts the support function from the space between disks and relocates it to the disk surface. By taking out the requirement for axial spacing and replacing it with a radial support mechanism, the device can be applied to various disk configurations including those with minimal axial distance.
2Stability of the object's composition
If the support portion is disposed between two disks, then the support portion is restricted from moving in the axial direction, but this requires a predetermined distance that reduces operational flexibility
Solution Approach 1:
The invention transitions the support mechanism from axial positioning (between disks) to radial positioning (on disk surface). The support portion contacts the disk surface radially, providing axial stability through the support surface geometry rather than through axial confinement between disks. This enables operational flexibility while maintaining position stability.
Solution Approach 2:
The support surface acts as an intermediary between the support portion and the disk. It provides the necessary reaction force to restrict axial movement of the support portion while allowing the device to be positioned on disks with varying axial spacings. The support surface mediates the interaction, decoupling stability from the axial distance constraint.
Data Source
AI summary
A moving blade removing device includes a pushing-out mechanism and a frame attached to the pushing-out mechanism. The pushing-out mechanism includes a contacting end to contact a moving blade, and a drive mechanism for moving the contacting end. The frame includes a base, a reaction force accepting portion, and a push accepting portion in a second base end portion of the base. The base has an outer circumference contacting surface facing the first height side to contact an outer circumferential surface of a disk. The reaction force accepting portion has an end contacting surface facing a second movement side to contact a first end surface of the disk. The push accepting portion has a mechanism contacting surface facing a first movement side and coming into contact with a mechanism end surface of the drive mechanism facing the second movement side.