Hemispherical Bore Connector Threaded Restraint
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Solution Overview
Problem
Existing methods for restraining bore connectors in dynamoelectric machines, such as using insulating strips or wrapping with insulators, are time-consuming, labor-intensive, and inadequate for providing sufficient restraint during operation.
Innovation Solution
A bore connector design featuring elongate hemispherical connector bodies with radially opening apertures, including threaded surfaces, allows for increased restraint by using a threaded member that exerts force against a rigid separator, enhancing the securement within the rotor bore without the need for custom insulating strips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating strips are used to restrain bore connectors, then the bore connectors are secured within the rotor bore, but the process is time-consuming and the restraint is insufficient during operation
Solution Approach 1:
The bore connector uses a threaded member that can be adjusted to dynamically change the restraint force applied to the rigid separator, allowing the system to adapt to operational requirements rather than being fixed by static insulating strips
Solution Approach 2:
The bore connector is divided into two hemispherical halves that can be assembled around the rigid separator, with the threaded member providing independent adjustment capability for the restraint mechanism
2Reliability
If insulators are wrapped and milled to fit the rotor bore, then the bore connectors are restrained, but the process is labor-intensive and insertion becomes difficult
Solution Approach 1:
The radial opening aperture is pre-formed in the connector body, allowing the rigid separator and threaded member to be inserted before final assembly, eliminating the need for post-installation milling or fitting operations
Solution Approach 2:
The rigid separator is nested within the bore connector structure, with the threaded member passing through the radial aperture to engage the separator, creating a compact integrated assembly that is easy to insert
3Reliability
If insulating strips are used to secure bore connectors, then the connectors are held in position, but the degree of restraint cannot be increased after installation
Solution Approach 1:
The threaded member enables dynamic adjustment of the restraint force by rotating to change the position of the rigid separator against the connector body, allowing the degree of restraint to be increased or decreased as needed
Solution Approach 2:
The system allows changing the restraint parameter (force magnitude) by rotating the threaded member, which moves the rigid separator to different positions, thereby adjusting the degree of restraint without replacing components
Data Source
AI summary
Embodiments of the invention relate generally to dynamoelectric machines and, more particularly, to bore connectors for dynamoelectric machines. In one embodiment, the invention provides a bore connector for a shaft of a dynamoelectric machine, the bore connector comprising: a pair of elongate connector bodies, each having a substantially hemispherical shape in cross section and at least one of which having: a radially opening aperture including an inner surface, at least a portion of which is threaded; and a threaded member having a threaded outer surface compatible with the threaded inner surface of the aperture, the threaded member being threadable into and out of the aperture.