Hardwearing Base for Rotating Electric Machines
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Solution Overview
Problem
Existing hardwearing bases for rotating electric machines fail to effectively manage axial and radial loads, especially in vertical applications, leading to excessive mechanical tension and limited torque capacity, which can result in premature wear and instability.
Innovation Solution
A hardwearing base design featuring a cradle with flanges and longitudinal reinforcements, incorporating semicircular openings with central protrusions and inclined sides for optimal axial locking, and radial channels with opposing brackets for enhanced axial and radial force distribution, ensuring robust support and fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional axial locking protrusions are used, then the structure is simple, but axial resistance is insufficient and mechanical tension concentration occurs
Solution Approach 1:
The axial locking protrusion is segmented into multiple locking surfaces (first, second, third locking surfaces) that engage with corresponding locking grooves at different angular positions. This segmentation distributes the axial load across multiple contact points, increasing axial resistance while preventing stress concentration at a single point.
Solution Approach 2:
The locking mechanism transitions from a single-point axial contact to a multi-dimensional engagement system. The locking surfaces are arranged at different angular positions around the circumference, creating a three-dimensional locking geometry that resists axial forces more effectively while maintaining structural efficiency.
2Strength
If radial fixation by straps is used, then the structure is simple, but torque capacity is limited and motor size is restricted
Solution Approach 1:
The radial fixation system is segmented into multiple brackets positioned at different angular locations around the cradle. Each bracket independently provides radial support and torque resistance, with the combined effect of all brackets significantly increasing the overall torque capacity beyond what a single strap could achieve.
Solution Approach 2:
The radial brackets are merged with the cradle structure through integrated fastening mechanisms, creating a unified load-bearing assembly. This combination eliminates the need for separate straps while achieving superior torque capacity through the rigid connection between brackets and cradle.
3Reliability
If bearing fastening uses conventional protrusions, then installation is simple, but bearing stability and precision are compromised
Solution Approach 1:
The bearing fastening system uses multiple locking surfaces and grooves positioned at different angular locations, creating multiple precise contact points. This segmentation allows for better distribution of dimensional tolerances across multiple interfaces rather than relying on a single critical mating surface, improving both stability and tolerance management.
Data Source
AI summary
The present invention relates to a hardwearing base (100) for rotating electric machines that has a cradle (110), bearings (200), covers (300), brackets (400) and fastening elements (500), the cradle (110) having a base (111) and a pair of flanges (120) arranged in a plane perpendicular to the base. Each of the flanges (120) of the hardwearing base (100) has a semicircular opening (122) that has a central protrusion (130) formed by a tooth that is flanked by oblong cutouts (134) and has a concave upper portion (131), inclined sides (132), inclined transition sides (133) between the upper concave portion (131) and the inclined sides (132), and two upper enlargements (140), each having an outward protrusion (141) and an inward protrusion (142) adjacent to an oblong cutout (143), in which the apex of the inward protrusion (142) extends beyond the curve of the semicircular opening (122) by a distance equal to the depth of the smaller side of the oblong cutout (143).