Resin Injection Apparatus for Laminated Core Rigidity
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Solution Overview
Problem
Existing methods for injecting resin into large laminated cores of rotating electric machines are inefficient and difficult to scale, leading to challenges in enhancing the rigidity and reducing vibrations of large machines.
Innovation Solution
A resin injection apparatus and method utilizing an injection pipe with a center hole and an elastic ring to block the gap between laminated core sheets, allowing for easy resin injection through an axial hole, enhancing the rigidity of the laminated core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laminated core is dipped in a tank filled with resin to impregnate the resin into the gap, then the gap between laminated core sheets is filled, but the manufacturing apparatus becomes larger in size and large-scale work is needed, making it difficult to directly apply for large capacity generators
Solution Approach 1:
The invention extracts the resin injection process from the large-scale tank dipping method, creating a localized injection system that targets only the specific gap areas in the laminated core. This eliminates the need for large-scale work areas while achieving precise gap filling.
Solution Approach 2:
The invention introduces a resin injection unit as an intermediary device between the resin source and the gap. This unit includes an injection pipe that can be inserted into axial holes and deliver resin directly to gap locations, serving as a mediator that enables precise resin delivery without requiring large-scale apparatus.
2Strength
If resin is injected into the gap between laminated core sheets, then the rigidity of the laminated core is enhanced, but the injection process becomes complex for large-size rotating electric machines
Solution Approach 1:
The invention segments the injection process by dividing the laminated core into multiple regions with axial holes, and inserting injection pipes into each hole to inject resin locally. This segmentation approach simplifies the overall injection process for large machines by breaking it down into manageable segments rather than requiring a complex universal injection system.
Solution Approach 2:
The invention utilizes the existing axial holes in the laminated core structure as self-provided injection channels. By inserting injection pipes into these pre-existing holes, the system leverages the structure's own features to facilitate resin injection, eliminating the need for additional complex injection infrastructure.
3Ease of manufacture
If the outer periphery of the injection pipe is not blocked, then resin can be supplied easily, but resin leaks into the space between the injection pipe and axial hole instead of filling the gap
Solution Approach 1:
The elastic ring serves as an intermediary sealing element between the injection pipe and the axial hole wall. It prevents resin from leaking into the annular space while allowing the injection pipe to be easily inserted and positioned, thus maintaining both ease of manufacture and injection precision.
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
The apparatus effectively injects resin into the gaps of large laminated cores, improving the rigidity and reducing vibrations in rotating electric machines, even for large-scale generators.
Implementation Method 1
the outer periphery of the elastic ring is firmly attached to the inner periphery of the axial hole
Data Source
Figure 1~2B
Figure 3A~4
Figure 5A~5C
AI summary
An object is to easily inject resin into a gap of a laminated core which constitutes a rotating electric machine. Included are: a resin supplying unit (25) which feeds the resin; and a resin injection unit (15) which injects the resin into an axial hole (14) of the laminated core. The resin injection unit (15) has an injection pipe (16) and an elastic ring (19) attached to the injection pipe (16). This elastic ring (19) is made to firmly attach to the inner periphery of the axial hole (14); the resin is supplied from the resin supplying unit (25); and the resin is injected into the gap of the laminated core through the axial hole (14) of the laminated core.