Terminal Box Vertical Insulator Mounting for Hydrogen Generator
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Solution Overview
Problem
Conventional rotating electrical machines require an increased height for the terminal box due to horizontally installed support insulators, which compromises structural strength and necessitates additional measures to prevent deformation, while existing solutions fail to address these issues effectively.
Innovation Solution
The support insulator is installed vertically on the bottom face of the terminal box, with the high voltage bushing disposed in parallel, reducing the terminal box's height and eliminating the need for deformation suppression measures, thereby enhancing structural rigidity and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support insulator is installed horizontally to the terminal box, then the armature lead can be supported and cooling flow path function is provided, but the height of the terminal box must be increased
Solution Approach 1:
The support insulator is rotated from horizontal installation to vertical installation, changing the spatial dimension of installation. This dimensional change allows the insulator to utilize the radial space of the terminal box rather than increasing the axial height, thereby maintaining the support and cooling functions while reducing the terminal box height requirement
2Reliability
If the height of the terminal box is increased, then the insulation distance and work space are secured, but the structural strength is reduced
Solution Approach 1:
By changing the installation dimension from horizontal to vertical, the terminal box height is reduced while maintaining adequate insulation distances through proper vertical spacing arrangement. The structural strength is improved as the shorter box height reduces the lever arm for deformation forces while still providing sufficient working space
3Ease of operation
If the terminal box size increases, then the support insulator can be installed, but deformation suppression measures are required
Solution Approach 1:
Instead of increasing the terminal box size to accommodate the support insulator, the invention inverts the approach by installing the insulator vertically within the existing box footprint. This inversion eliminates the need for additional deformation suppression measures such as ribs or thickening while maintaining adequate installation space
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
This configuration reduces the terminal box height, increases structural rigidity, decreases deformation caused by internal gas pressure and vibration, and improves cooling efficiency by shortening the vent path and reducing vent resistance.
Implementation Method 1
The support insulator is installed vertically on a bottom face of the terminal box... The support insulator installed vertically and a portion of the high voltage bushing located in the terminal box are disposed in parallel with each other
Implementation Method 2
the terminal box containing at least the power lines supported by the support insulator and a part of the high voltage bushing connected to the supported power lines... the inside of the generator (rotating electrical machine) is filled with the pressurized coolant gas
Implementation Method 3
the coolant gas in the rotating electrical machine outer casing is led to the inside of the lead box to cool the output lead, the lead connection, and the lead bushing
Implementation Method 4
a high voltage bushing that outputs electricity from the stator coil to an outside of the machine... to ensure an insulation creepage distance and an electrical gap
Implementation Method 5
a large rotating electrical machine filled with pressurized hydrogen gas in the machine... the inside of the generator (rotating electrical machine) is filled with the pressurized coolant gas
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A rotating electrical machine includes: a rotor; a stator; a high voltage bushing; power lines connecting the stator coil to the bushing; a support insulator that supports the power lines; a rotating electrical machine outer casing that contains at least the rotor, the stator and a connection portion between the stator coil and the power lines, and is filled with hydrogen gas; and a terminal box which communicates with the outer casing and is attached to a lower portion of the outer casing, the insulator installed in the terminal box, and terminal box containing at least the power lines supported by the insulator and a part of the bushing connected to the supported power lines. The insulator is installed vertically on a bottom face of the terminal box, and the vertically installed insulator and a portion of the bushing in the terminal box are disposed in parallel with each other.