Adjustable Bearing Damper for Real-Time Shaft Vibration Control
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Solution Overview
Problem
Mechanical vibrations in rotating shaft machines can lead to deterioration, shutdowns, and significant production losses due to existing bearing systems' inability to effectively manage vibrations in real-time.
Innovation Solution
A bearing support system featuring a knitted wire mesh pad damper with adjustable stiffness and damping, controlled by a compression ring and actuator, which responds to mechanical vibrations using a worm drive mechanism to maintain optimal vibration levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed stiffness bearing damper is used, then the structure is simple and reliable, but the system cannot adapt to varying vibration conditions and may require shutdowns when vibration limits are exceeded
Solution Approach 1:
The bearing damper structure is transformed from a fixed static configuration to a dynamic adjustable one. The knitted wire mesh pad can be dynamically compressed along the axial direction to change its stiffness and damping characteristics in real-time based on vibration conditions, allowing the system to adapt without shutdowns
Solution Approach 2:
The physical parameters of the bearing damper (stiffness and damping) are changed by applying axial compression to the knitted wire mesh pad. This compression modifies the pad's density and structural properties, enabling continuous adjustment of vibration mitigation characteristics without changing the physical structure of the damper itself
2Reliability
If the bearing damper stiffness is increased to reduce vibrations, then vibration mitigation improves, but the system becomes less adaptable to changing operating conditions
Solution Approach 1:
The bearing damper incorporates a dynamic adjustment mechanism that allows the stiffness to be varied in real-time. The axial compression of the knitted wire mesh pad can be modified based on feedback from vibration sensors, enabling the system to maintain optimal vibration control while adapting to changing operating conditions such as load variations and speed changes
3Productivity
If real-time vibration monitoring and adjustment is implemented, then machine shutdowns are prevented, but the system complexity and cost increase
Solution Approach 1:
The system incorporates vibration sensors that continuously monitor the vibration levels of the rotating shaft and provide feedback to a controller. Based on this feedback, the controller automatically adjusts the axial compression of the knitted wire mesh pad through an adjustment mechanism, creating a closed-loop control system that maintains optimal vibration levels and prevents shutdowns
Solution Approach 2:
The bearing damper system is designed to automatically monitor and adjust its own vibration mitigation characteristics without external intervention. The feedback control system self-regulates the compression of the knitted wire mesh pad based on real-time vibration measurements, enabling the system to maintain continuous operation and prevent shutdowns autonomously
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 system automatically adjusts the bearing damper's stiffness and damping to mitigate vibrations, preventing machine shutdowns and reducing production losses by maintaining optimal operation and extending the life of the bearing system.
Implementation Method 1
a bearing damper disposed around the bearing. The bearing damper comprises a knitted wire mesh pad
Implementation Method 2
a compression ring positioned to be movable relative to the bearing housing in the axial direction such that a movement of the compression ring in the axial direction applies a compression to the bearing damper
Implementation Method 3
The actuator comprises a worm drive
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A bearing support system (100) includes a bearing disposed within a bearing housing (104). A bearing damper (176) is disposed around the bearing and includes one or more knitted mesh pads. A compression ring (192) is positioned to be movable relative to the bearing housing and to apply a compression to the bearing damper that results in a change in at least one of a length and a wall thickness of each knitted wire mesh pad and a corresponding change in the stiffness and bearing of the damper. The system supports rotation of a shaft and may include one or more sensors (220) to measure vibrations in the shaft and a controller (228) to control movement of the compression ring in response to the mechanical vibrations.