Staggered Brush Bundle for Slip Ring Contact Durability
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Solution Overview
Problem
Conventional brush-type contact systems in sliding contact arrangements suffer from reduced durability and signal quality due to the negative impacts of lubricants and abrasion, leading to increased sensitivity to unevenness and the need for overdimensioning, which compromises dynamic properties.
Innovation Solution
A brush contact system with multiple small brushes arranged staggered or in an inclined manner to push lubricants and abrasion aside, maintaining brush elasticity and service life, and utilizing solid lubricants to uniformly wear with the brushes, reducing contact with contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brush-type contact systems are used in sliding contact arrangements, then electrical contact is established between moving components, but the brushes suffer from reduced durability and impaired elasticity due to lubricants and abrasion
Solution Approach 1:
The invention divides a single brush into multiple smaller brushes (brush elements) arranged in a bundle. Each brush element has a diameter of 0.5mm to 2mm, while the overall bundle diameter remains 5mm to 20mm. This segmentation reduces the contact area of each individual brush element with contaminants, minimizing the impairment from lubricants and abrasion, thereby improving brush durability and maintaining elasticity longer.
2Stability of the object's composition
If brushes are overdimensioned to compensate for sensitivity to unevenness, then contact stability is improved, but dynamic properties deteriorate due to greater weight
Solution Approach 1:
The brush is segmented into multiple thin brush elements (each 0.5mm to 2mm diameter) arranged in a bundle. This segmentation provides both stability through the collective contact of multiple elements and maintains dynamic properties because each individual element remains lightweight and flexible, avoiding the weight penalty of a single oversized brush.
Solution Approach 2:
The brush bundle functions as a composite structure combining multiple brush elements with different orientations and properties. The carrier holds these elements in a configuration that provides both mechanical stability for consistent contact and the flexibility needed for dynamic compensation of track irregularities, without requiring excessive weight.
3Duration of action of moving object
If multiple small brushes are used instead of one big brush, then elasticity and dynamic properties are improved, but contact stability may be compromised
Solution Approach 1:
The brush is divided into multiple small brush elements (0.5mm to 2mm diameter) that are individually more elastic and flexible than a single large brush. The carrier assembly holds these elements in a configured arrangement that ensures consistent contact geometry, providing both improved elasticity/duration and maintained contact stability through the collective action of all elements.
Solution Approach 2:
Multiple elastic brush elements are merged into a single functional brush bundle held by a carrier. The individual elements combine their elastic properties to provide enhanced duration of action while the carrier structure merges their positioning to maintain contact stability, achieving both improved elasticity and consistent contact.
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 brush contact system achieves improved durability and signal quality by minimizing the impact of contaminants, allowing for better compensation of track irregularities and maintaining elasticity, thus extending service life and reducing the need for overdimensioning.
Implementation Method 1
Arrangements for establishing a sliding contact between two moving components may have a lubricant (e.g., a liquid lubricant) between components moved relative to each other.
Implementation Method 2
The plurality of brushes establishes contact on the relative movement of the device elements along a slideway provided on the other device element (i.e., the plurality of brushes slide along the other device element and thereby establish a contact).
Implementation Method 3
The solid lubricant may, for example, be incorporated in each brush of the plurality as individual fibers, which wear uniformly with the plurality of brushes. This, at least partially, eliminates problems incurred by oil lubrication.
Data Source
AI summary
The present embodiments relate to a device for establishing an electrical contact between two device elements moving relative to each other. The device includes a plurality of brushes that may be arranged on one of the device elements and establishes contact on the relative movement of the device elements along a slideway provided on the other device element. The brushes are arranged staggered one behind the other relative to a direction of movement determined by the relative movement. The brush arrangement according to the present embodiments is more robust than conventional arrangements with respect to wear and ageing.