Spring Support Assembly for Horizontal Stator Core Installation
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Solution Overview
Problem
Existing methods for replacing stator cores in power generators are challenging, especially when the stator frame is in a horizontal position, as they require direct coupling of keybars to the main housing for support, which complicates the installation process.
Innovation Solution
A support assembly that includes spring assemblies, a backstop structure, a trolley with rail assembly, and a lift assembly allows for the installation of a replacement stator core in a horizontal stator frame without direct coupling of keybars to the main housing, using spring assemblies to structurally support the core and a trolley to facilitate axial movement and positioning of laminations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If keybars are directly coupled to the main housing to support the stator core, then the stator core can be securely supported, but the installation process becomes more complex and difficult when the stator frame is in a horizontal position
Solution Approach 1:
The patent introduces spring assemblies as intermediary components between the keybars and the stator core. These spring assemblies include spring members that can be compressed to facilitate installation while providing continuous support, thereby simplifying the installation process while maintaining secure support of the stator core in horizontal position
Solution Approach 2:
The spring assemblies allow for parameter changes in the support system by enabling compression and expansion of the spring members during installation and operation. This dynamic parameter adjustment facilitates easier installation of laminations and donuts while maintaining reliable support throughout the operational range
2Ease of operation
If the stator frame is placed in an upright position to receive a new stator core, then the installation process is simplified, but it becomes very difficult to install when the generator has been in operation for some time
Solution Approach 1:
The support assembly enables dynamic installation in horizontal position by allowing the stator core components to be installed while the stator frame remains in its operational horizontal orientation. The spring assemblies provide dynamic adjustment capability that accommodates the weight and positioning requirements during installation without requiring frame repositioning
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
Enables efficient and secure replacement of stator cores in a horizontal stator frame, reducing installation complexity and ensuring proper alignment and support without the need for direct keybar coupling to the main housing.
Implementation Method 1
A plurality of spring assemblies are provided for supporting a stator core within a stator frame
Data Source
Figure 1~3
Figure 2
Figure 4
AI summary
A support assembly for servicing a stator frame of a power generator includes a plurality of rails and a trolley. The rails are supported on frame rings of a main housing of the stator frame. The rails have upper surfaces that provide temporary support for lower support surfaces of second laminations of a second stator core once the second laminations are inserted into desired axial positions within the main housing. The trolley is provided for axial movement on the upper surfaces of the rails for inserting the second laminations into the main housing. The trolley includes a lamination-engaging portion including a lamination support surface for supporting upper support surfaces of the second laminations and a plurality of rail wheels provided for axial movement of the trolley within the main housing on the upper surfaces of the rails.