Integral Turbocompressor Stator Inner Ring Mounting Method
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Solution Overview
Problem
The existing methods for mounting an integral inner ring of a turbocompressor stator to a guide vane ring without axial partition are inefficient, leading to increased wear and shortened service life, as well as unwanted vibration, due to the segmented nature of previous solutions.
Innovation Solution
A method involving pre-tensioning an integral inner ring to a smaller radius and then relaxing it to match the guide vane ring's radius, allowing for threading without jamming, utilizing a die plate to control deformation and prevent overextension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an integral inner ring is mounted without axial partition using conventional methods, then mounting complexity is reduced, but mounting difficulty increases significantly
Solution Approach 1:
The patent applies parameter changes by temporarily altering the geometric parameters of the inner ring. The inner ring is pre-tensioned to reduce its outer radius from R to r (where r < R), enabling it to be inserted into the guide vane ring. After insertion, the pre-tensioning force is removed, allowing the inner ring to relax back to its original radius R, achieving secure mounting without complex procedures
Solution Approach 2:
The patent employs preliminary action by pre-tensioning the inner ring before insertion. The inner ring is subjected to pre-tensioning force in advance to reduce its radius, making it small enough to be inserted into the guide vane ring through the openings. This preliminary deformation prepares the inner ring for easy insertion, and the subsequent relaxation secures it in place
2Ease of manufacture
If an inner ring is segmented to enable mounting, then mounting becomes possible, but wear increases and service life shortens
Solution Approach 1:
The patent applies segmentation to the openings in the inner ring, not to the inner ring itself. The inner ring retains its integral structure, but the openings are designed with specific geometric parameters that allow the inner pins of guide vanes to be inserted. This segmentation of the openings enables mounting while preserving the integrity and longevity of the inner ring structure
3Ease of manufacture
If an inner ring is segmented for mounting purposes, then mounting can be achieved, but unwanted vibrations occur
Solution Approach 1:
The patent uses segmentation of the openings in the inner ring rather than segmentation of the inner ring itself. The openings are positioned and dimensioned to accommodate the inner pins of guide vanes, enabling mounting while maintaining the structural integrity of the inner ring. This integral structure eliminates the cluster vibrations that occur with segmented inner rings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables simple mounting and dismantling of the inner ring, reducing wear and vibration, and extends the service life by utilizing the deformable nature of the inner ring for secure alignment with the guide vane ring.
Implementation Method 1
pre-tensioning the inner ring to an outer radius r, which is smaller than the outer radius R of the untensioned inner ring; and relaxing the inner ring to the outer radius R
Data Source
AI summary
A method for mounting an integral inner ring (10) of a turbocompressor stator to a guide vane ring (12) comprises the following steps: -Providing the guide vane ring (12) with an inner radius S; -Providing inner ring (10) with an outer radius R, which corresponds to the inner radius S; -Pre-tensioning inner ring (10) to an outer radius r that is smaller than the outer radius R of the untensioned inner ring (10); and -Relaxing inner ring (10) to the outer radius R.