Traction Motor Ventilation Access for In-Place Channel Cleaning
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Solution Overview
Problem
Existing electric traction motors in the railway industry face challenges in maintaining the cleanliness of ventilation channels, which leads to reduced cooling efficiency due to dirt and dust accumulation, and requires extensive dismounting and disassembly for inspection and cleaning.
Innovation Solution
The motor design incorporates a first aperture in the motor frame with a reversible cover, allowing for endoscopic inspection and cleaning of ventilation channels without full disassembly, along with a second aperture for accessing and removing debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor is designed with closed ventilation channels to prevent pollution accumulation, then the cooling efficiency is maintained, but the inspection and cleaning become impossible without full disassembly
Solution Approach 1:
The motor frame is segmented to include a removable cover that provides access to the ventilation channels. This segmentation allows the ventilation system to remain closed during operation (maintaining reliability) while being accessible for inspection and cleaning (improving ease of operation). The cover creates a separate access path that does not require full disassembly of the motor.
Solution Approach 2:
A removable cover acts as an intermediary element between the external environment and the ventilation channels. This intermediary provides controlled access to the channels for maintenance purposes while maintaining the closed structure during normal operation, thus resolving the contradiction between sealed design and maintenance accessibility.
2Ease of repair
If the motor requires full disassembly for ventilation channel cleaning, then complete cleaning is achieved, but the maintenance time and complexity increase significantly
Solution Approach 1:
The motor assembly is segmented with a removable cover that provides direct access to the ventilation channels. This allows maintenance personnel to perform cleaning operations on the channels without disassembling the entire motor, thus achieving complete cleaning of the accessible channels while significantly reducing maintenance time.
Solution Approach 2:
The removable cover is designed to be easily removed and reinstalled, preparing the motor for quick maintenance operations. This preliminary design feature enables rapid access to the ventilation channels, reducing the time required for inspection and cleaning while ensuring thorough cleaning can still be performed.
3Ease of operation
If the motor is designed with easy access for maintenance, then the maintenance complexity is reduced, but the structural integrity and sealing may be compromised
Solution Approach 1:
The motor frame is segmented with a removable cover that maintains the structural integrity of the main body. The cover is designed as a separate component that can be attached and detached without compromising the strength of the motor frame, thus providing maintenance accessibility while preserving structural integrity.
Solution Approach 2:
The removable cover is designed to nest within or attach to the motor frame structure, maintaining the overall structural integrity. The cover creates a nested access point that does not weaken the main motor structure, allowing easy maintenance access while preserving the strength and sealing of the motor housing.
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 design simplifies the maintenance process by allowing inspection and cleaning of ventilation channels with minimal mounting/dismounting operations, thereby maintaining cooling efficiency and reducing maintenance complexity.
Implementation Method 1
said fan being able to generate the air flux through the at least one ventilation channel of the rotor
Implementation Method 2
open motors used in the railway industry are cooled by an air flow generated through the ventilation channels of the rotor
Data Source
AI summary
disclosure An electric traction motor, including: a motor shaft; a rotor fixed to the motor shaft, the rotor including a ventilation channel; a stator coupled to the rotor, the stator defining a cylindrical inner space enclosing the rotor; a motor frame fixed to the stator and enclosing the rotor and stator, the motor shaft being able to rotate relative to the motor frame; and air vents opening on the motor frame and allowing passage for an air flux through the at least one ventilation channel of the rotor. The electric traction motor also includes a first aperture formed in the motor frame, the first aperture being included in the cylindrical inner space defined by the stator.