Submersible Electric Machine Vibration Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Submersible electric machines, such as pumps, face issues with false vibration warnings due to non-collinear detrimental vibrations and unknown unfavorable frequencies, leading to unnecessary stops and reduced operational life.
Innovation Solution
A vibration sensor configured to monitor vibrations in at least two dimensions up to 500 Hz, with a metal partition having a natural frequency above 500 Hz to avoid interference and provide accurate monitoring, integrated into a submersible electric machine with a 3D monitoring capability and a rigid, lightweight aluminum partition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration sensor is installed in submersible electric machines to monitor vibrations, then the reliability of the machine is improved through early detection of abnormal conditions, but false warnings and unnecessary stops occur due to non-collinear detrimental vibrations and unknown unfavorable frequencies
Solution Approach 1:
The patent changes the parameter of vibration monitoring by extending the frequency range from conventional single-frequency or limited-range monitoring to comprehensive multi-frequency monitoring up to 500 Hz. This parameter expansion allows the sensor to detect vibrations across the entire harmful frequency spectrum, eliminating false warnings caused by missed frequency ranges while maintaining accurate detection of actual abnormalities.
Solution Approach 2:
The patent introduces a new dimension to vibration monitoring by adding temporal frequency resolution. Instead of monitoring vibrations in a single frequency band, the system now monitors across multiple frequency dimensions (up to 500 Hz), enabling differentiation between harmful vibrations and benign environmental vibrations, thereby reducing false alarms and unnecessary stops.
2Reliability
If a vibration sensor is installed to detect abnormal conditions, then the protective feature is improved, but the device complexity increases due to additional sensing and monitoring components
Solution Approach 1:
The patent applies multi-functionality by designing the vibration sensor system to perform multiple monitoring tasks simultaneously - detecting vibrations across the full 500 Hz frequency range, identifying abnormal conditions, and providing protective warnings. This universal sensing capability consolidates what would otherwise require multiple separate sensors or complex signal processing systems into a single integrated solution.
3Device complexity
If conventional vibration sensors are used with limited frequency range, then the device complexity is reduced, but measurement precision deteriorates due to inability to detect all harmful frequencies
Solution Approach 1:
The patent fundamentally changes the frequency parameter range of the vibration sensor from conventional limited ranges to an extended 0-500 Hz spectrum. This parameter expansion captures all potentially harmful vibration frequencies, significantly improving measurement precision and detection accuracy while maintaining relatively simple sensor hardware through efficient signal processing techniques.
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 solution enables efficient monitoring and preventive measures, reducing false warnings and extending the productive life of submersible electric machines by accurately detecting harmful vibrations across a wide frequency range.
Implementation Method 1
A vibration sensor configured to monitor vibrations in at least two dimensions up to 500 Hz
Implementation Method 2
the partition is made of metal, is connected to the top unit housing and has a natural frequency equal to or more than 500 Hz
Data Source
AI summary
A submersible electric machine for transporting a liquid, the machine having a hydraulic unit with an impeller, and a drive unit with a housing defining a motor compartment having an electric motor inside. A drive shaft is connected to the electric motor, and extends from the electric motor to the hydraulic unit to a connection with the impeller. A top unit includes a housing defining an electronics chamber separated from the motor compartment by a dividing structural wall. The electronics chamber has a metal partition, having a natural frequency equal to or more than 500 Hz, connected to the top unit housing. A vibration sensor is directly or indirectly connected to the metal partition and monitors vibrations in at least two dimensions at frequencies ranging up to 500 Hz.