Rotor Assembly Cooling Fluid Flow Guidance
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Solution Overview
Problem
Conventional rotor assemblies face challenges in efficiently cooling coil turns due to limited cooling fluid inflow and inadequate support structures, which hinder effective heat dissipation and performance in generators.
Innovation Solution
The proposed rotor assembly incorporates a vane ring with obliquely oriented blades to guide cooling fluid and a supporting unit with insulation rings and blocks to enhance fluid flow and support the coil turns, eliminating the need for a centering ring and improving cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooling fluid is drawn into space between structures including a centering ring for supporting a rotor coil, then the rotor coil can be supported, but the cooling efficiency is insufficient because use of only an inlet flow by a pumping head and a fan makes it difficult to efficiently cool the rotor coil
Solution Approach 1:
The centering ring is divided into multiple segments that can be separated. This segmentation allows cooling fluid to flow through the spaces between the segments, enabling both structural support and effective cooling of the rotor coil simultaneously
Solution Approach 2:
Cooling fluid is introduced as an intermediary substance to flow through the segmented centering ring structure. The fluid acts as a mediator that transfers heat away from the rotor coil while the segmented structure provides mechanical support, resolving the conflict between support stability and cooling efficiency
2Volume of moving object
If a coil turn is configured to come into close contact with a spindle of the rotor, then space is saved, but there is no space between coil turns and thus it is difficult to efficiently cool the coil turns
Solution Approach 1:
The cooling function is extracted from the coil turn structure itself and implemented through a separate cooling fluid delivery system. The cooling fluid is introduced into the rotor assembly and directed to flow around and through the coil turns, providing cooling without requiring physical spacing between the coil turns
Solution Approach 2:
A hydraulic cooling system using liquid cooling fluid is implemented to efficiently remove heat from the coil turns. The fluid is pumped through channels and spaces within the rotor assembly, providing high-efficiency cooling that does not depend on physical spacing between coil components
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 design increases the inlet flow rate of cooling fluid, ensuring smooth fluid flow and effective cooling of coil turns, thereby enhancing the cooling efficiency and supporting the coil turns without impeding fluid flow.
Implementation Method 1
a vane ring coupled to one end of the housing and provided with a plurality of blades guiding cooling fluid to the coil turn
Implementation Method 2
When the rotor rotates, current flowing through the coil generates heat. If heat generated from the coil of the rotor is not effectively dissipated, it causes deterioration in performance of the generator
Data Source
AI summary
Disclosed herein is a rotor assembly, including a cylindrical housing coupled to an outer circumferential surface of a rotor body and configured to house a coil turn therein, a supporting unit disposed in the housing and configured to prevent the coil turn from being pushed in an axial direction of a rotor, and a vane ring coupled to one end of the housing and provided with blades guiding cooling fluid to the coil turn. The rotor assembly may include: coil turns each of which is formed by stacking conductors in a multilayer structure and includes a linear part interposed between teeth, and a curved part extending from the linear part and disposed on an outer surface of a spindle; first supporting blocks which are inserted into the curved part and disposed between the conductors; and a second supporting block which is disposed between the first supporting blocks.