Motor Vibration Cause Determination Using Segmented Baseline Comparison
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Solution Overview
Problem
Existing systems fail to accurately determine the cause of abnormal vibration in a motor-main shaft connection state, requiring extensive component examination and often identifying only a specific cause, which is time-consuming.
Innovation Solution
A motor vibration cause determination system that includes a vibration sensor unit to detect vibrations in standalone, non-connection, and connection states, and a vibration cause determination unit to analyze these vibrations to identify the cause of abnormal vibration, considering multiple factors such as imbalance, centering defects, and bearing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional vibration detection technologies are used to detect abnormal vibration in motor-main shaft connection, then vibration can be detected, but the system cannot accurately determine the specific cause among multiple potential causes
Solution Approach 1:
The invention segments the vibration analysis process into three distinct measurement phases: (1) motor standalone vibration measurement before shipping, (2) motor standalone vibration measurement after shipping but before connection, and (3) motor vibration measurement in connection state with main shaft. By dividing the diagnostic process into these segments, the system can identify which component or connection is causing the vibration abnormality, thereby improving cause identification accuracy without requiring complex examination of all components simultaneously.
Solution Approach 2:
The system performs preliminary vibration measurements on the motor in standalone state before shipping and again after shipping but before connection to the main shaft. These preliminary measurements establish baseline vibration characteristics that are stored for later comparison. This preliminary action enables the system to quickly determine whether vibration abnormalities originate from the motor itself or from the connection assembly, significantly improving diagnostic accuracy while reducing the complexity of on-site examinations.
2Measurement precision
If comprehensive component examination is performed to identify all potential vibration causes, then accurate cause determination can be achieved, but it takes a considerable amount of time
Solution Approach 1:
The system performs preliminary vibration measurements on the motor in standalone state before shipping and stores these results. When vibration abnormalities occur in the connection state, the system compares the abnormal vibration data with the pre-stored baseline data to quickly identify the cause. This preliminary action eliminates the need for time-consuming comprehensive examinations on-site, as the comparison with baseline data rapidly pinpoints whether the issue originates from the motor or the connection assembly.
Solution Approach 2:
Instead of examining components to determine their vibration characteristics, the invention inverts the approach by first measuring and storing the vibration characteristics of each component (motor) in isolation, then using these stored characteristics to identify problems in the assembled system. This inversion transforms a time-consuming component-by-component examination into a rapid comparison process, significantly reducing identification time while maintaining high accuracy.
3Ease of operation
If only specific vibration causes are detected by conventional technologies, then simple diagnostic processes are used, but multiple potential causes cannot be comprehensively identified
Solution Approach 1:
The invention segments the vibration source identification into distinct categories by measuring vibrations under different conditions: motor standalone before shipping, motor standalone after shipping, and motor in connection state. Each measurement segment provides information about specific potential causes (motor imbalance, bearing defects, centering defects, etc.). By maintaining these segmented measurements, the system comprehensively captures multiple potential causes while keeping the diagnostic process simple through systematic comparison of the segmented data.
Solution Approach 2:
The vibration measurement system is designed to universally detect multiple types of vibration causes through a single multi-functional measurement approach. By measuring vibrations in three different states (before shipping, after shipping, in connection), the same measurement system can identify various causes including motor imbalance, bearing defects, and centering defects, eliminating the need for separate specialized examinations for each potential cause while maintaining diagnostic simplicity.
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
Enables efficient determination of vibration causes in a motor-main shaft connection state, reducing the time required for identification and allowing for precise adjustment operations by considering multiple potential causes.
Implementation Method 1
a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state
Data Source
AI summary
A motor vibration cause determination system includes: a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state; a vibration information storage unit that stores information on the vibration of the motor detected by the vibration sensor unit, the information including information on the first, second, and third vibrations; and a vibration cause determination unit that determines the cause of vibration occurring in the connection state on the basis of the vibration information stored in the vibration information storage unit.