Slip Ring Brush Cooling Duct Design for Wind Turbines
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Solution Overview
Problem
Current slip ring units face challenges in effectively cooling slip ring brushes during high electrical power transmission, which can lead to overheating and reduced efficiency.
Innovation Solution
A holding apparatus with two slots for slip ring brushes, separated by a cooling duct that allows airflow to cool the brushes, and additional openings for improved airflow access, combined with a resilient element for positioning and heat management, and a bow-shaped base element for efficient electrical power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high electrical power is transmitted through slip ring brushes, then power transmission capability is improved, but heat generation increases causing overheating
Solution Approach 1:
A cooling duct is introduced as an intermediary structure between the slip ring brush and the environment. The duct channels cooling air flow directly over the brush surface, acting as a mediator to transfer heat away from the brush while maintaining electrical contact functionality
Solution Approach 2:
The invention uses pneumatic cooling by directing air flow through a cooling duct over the slip ring brush. The air flow removes heat from the brush surface, enabling sustained high power transmission without overheating. The cooling air is supplied through openings in the holding apparatus and directed along the brush in the direction of current flow
2Temperature
If cooling air flow is directed along the slip ring brush, then cooling efficiency is improved, but the holding apparatus structure becomes more complex
Solution Approach 1:
The holding apparatus is designed to perform multiple functions: it holds the slip ring brush in position, provides structural support, and simultaneously serves as a cooling device through integrated cooling ducts and openings. This multi-functionality reduces the need for separate cooling components, thereby limiting the increase in device complexity
Solution Approach 2:
The cooling function is merged with the holding apparatus structure. The cooling duct is integrated into the holding apparatus body, and openings for air supply are incorporated directly into the holding apparatus, combining structural support and cooling functions in a single integrated component
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
Significantly enhances the cooling of slip ring brushes, ensuring efficient electrical power transmission, particularly in high-power applications like wind turbines, by utilizing airflow and heat-conductive materials for effective heat dissipation and continuous power delivery.
Implementation Method 1
The cooling duct is used so as to cool a side surface of the respective slip ring brush
Implementation Method 2
utilizing airflow and heat-conductive materials for effective heat dissipation
Implementation Method 3
a resilient element for positioning and heat management
Data Source
AI summary
A holding apparatus for a slip ring unit includes at least two slots configured for receiving slip ring brushes respectively, with the at least two slots being arranged in spaced-apart relationship. A cooling duct is arranged between the at least two slots for cooling a side surface of the slip ring brushes. The cooling duct is configured as a third slot between the at least two slots, with the at least two slots and the cooling duct being of essentially identical shape and dimension.