Frequency Altering Brace for Electric Motor Vibration Control
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Solution Overview
Problem
Existing electric motor systems face vibration resonance issues due to frequency matching between motor vibrations and the resonance frequency of the motor and housing system, leading to amplified noise and mechanical problems, which are costly to resolve by replacing motors or stands.
Innovation Solution
The implementation of vibration dampeners that stiffen the motor housing to alter the resonance frequency, preventing vibration amplification by attaching specific members to the motor and mounting plate, thereby changing the system's resonance frequency to be outside the range of generated vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resonance frequency of the motor system matches the vibration frequency generated by the motor and driven equipment, then the system operates normally, but vibrations are amplified causing loud noises and mechanical issues
Solution Approach 1:
The patent changes the physical parameters of the motor system by adding braces that modify the stiffness and mass distribution of the housing structure. This alters the resonance frequency (RCF) of the system, shifting it away from the harmful vibration frequencies generated during operation, thereby eliminating vibration amplification without requiring replacement of the motor or stand.
2Object-affected harmful factors
If the motor or stand is replaced to alter the resonance frequency, then vibration amplification is avoided, but heavy equipment is required and costs increase significantly
Solution Approach 1:
Instead of replacing the entire motor or stand system, the patent segments the problem by adding separate, independent brace components to the existing structure. These braces are individual elements that can be installed without removing the motor or stand, simplifying the solution while achieving the desired frequency alteration.
Solution Approach 2:
The braces act as intermediary elements between the motor housing and the stand, modifying the structural properties of the system without requiring replacement of the primary components. This intermediary approach allows frequency adjustment while maintaining the existing motor and stand infrastructure.
3Reliability
If the motor or stand is replaced to change the resonance frequency, then the RCF is altered to avoid vibration frequencies, but the process requires removing the motor from the stand and becomes very expensive
Solution Approach 1:
The braces are designed to be pre-configured and attached to the motor housing before installation on the stand, or easily attached afterward. This preliminary preparation allows for quick installation without requiring motor removal, reducing installation time and labor costs while achieving the necessary resonance frequency adjustment.
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
The vibration dampeners effectively reduce motor housing movement during vibrations, shifting the resonance frequency to avoid amplification, thus minimizing noise and mechanical issues without the need for costly motor or stand replacements.
Implementation Method 1
The vibration dampener stiffens the bending moment of a housing of an electrical motor, resulting in the housing moving less with the vibrations generated by the combined system (motor and driven equipment)
Implementation Method 2
The vibration dampener is configured to increase stiffness of the motor housing to alter the RCF of the motor system by a predetermined amount to ensure that the RCF of the combined assembly is outside the range of vibration frequencies generated by the combined system, avoiding amplification of vibrations
Data Source
AI summary
A vibration dampening brace for a motor enables altering the stiffness and reed critical frequency of a combined system of the motor and driven equipment without removal of the motor from a motor stand or support structure. The vibration dampening brace includes a first member configured to engage a portion of a housing of an electrical motor and a second member operatively connected to the first member to stiffen the bending moment of the electrical motor housing, resulting in the housing moving less with the vibrations generated by the combined system of the motor and the driven equipment. The vibration dampening brace alters the RCF of the motor system by a predetermined amount to modify the RCF of the combined system and ensure that the RCF of the combined system is outside a range of vibration frequencies that would amplify the motor vibrations.