Pressurized Electromechanical Cable for Motor Protection
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Solution Overview
Problem
Electromechanical devices, such as motors, face reduced service life and contamination issues due to moisture and contaminants ingress, especially in humid or submerged conditions, where existing seals fail, and introducing positive or negative pressure requires costly and labor-intensive modifications that may void warranties.
Innovation Solution
A pressurized cable that provides both electrical connections and a supply of air or vacuum using existing connections, preventing moisture and contaminants ingress without altering standard components, and can introduce reactive gases to neutralize pollutants or disperse heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air fittings are installed via drilled holes in motor casings to provide positive pressure, then moisture ingress is prevented, but manufacturing complexity and cost increase, and warranties are voided
Solution Approach 1:
The cable assembly serves multiple functions simultaneously: it provides electrical power/signal transmission to the motor and also delivers pressurized dry air to maintain positive pressure inside the motor. This multi-functionality eliminates the need for separate air fitting installations, drilled holes, and custom modifications - a single standard cable connection accomplishes both electrical and pressurization needs
Solution Approach 2:
The electrical cable connection and air supply system are merged into a single integrated cable assembly. The air delivery lumen is embedded within the cable structure itself, allowing both electrical conductors and air flow to share the same physical pathway and connection point at the motor, simplifying installation to a single plug-and-play connection
2Adaptability or versatility
If motors operate in humid or submerged conditions, then application versatility is improved, but contaminant ingress increases, reducing service life
Solution Approach 1:
The system provides self-service protection by continuously supplying dry air to the motor interior, creating a self-sustaining positive pressure environment that automatically prevents contaminant ingress. The cable assembly itself carries the dry air supply, making the protection system self-contained and independent of external intervention or complex external pressurization infrastructure
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
Extends the service life of electromechanical devices by preventing moisture and contaminants, reduces pollutant emissions, and maintains warranty validity by using existing connections, enhancing performance and cleanliness in industrial and sterile environments.
Implementation Method 1
provides positive pressure to keep moisture out of motor casings
Implementation Method 2
introduction of a slight vacuum or negative pressure to an electromechanical assembly
Implementation Method 3
The supply line cable has an internal pathway that allows for air or gas to be supplied into the cable
Data Source
AI summary
An inventive pressurized cable is provided that simultaneously provides electrical connections and a supply of air, gas, or vacuum to an electromechanical device utilizing an existing connection on the device. The use of an existing cable connection for the supply of air or gas to provide positive pressure or a vacuum condition to an electromechanical enclosure allows for the use of standard electromechanical components without alteration and potential voiding of existing warranties. The present invention finds particular utility in the field of industrial automation where motors are subjected to coolant liquids and other types of contaminants that tend to infiltrate the motor seals, especially when the motor is shut down which causes a negative pressure inside the motor case that draws moisture in. Reactive gasses may be introduced with the inventive positive pressure cable that act to neutralize or condition harmful pollutants generated by the motor such as ozone.