Centrifugal Compressor Resonance Avoidance via Bearing Beam
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Solution Overview
Problem
Centrifugal compressors face resonance issues due to natural frequency alignment with 50-60 Hz during operation, which existing designs struggle to avoid or mitigate effectively, leading to vibration transmission and reduced service life.
Innovation Solution
Incorporating a bearing beam and damping pads between the compressor head, motor, cooler, and chassis to isolate vibrations, preventing resonance by decoupling the drive chain from the chassis and external vibrations, and allowing for a broader power section motor adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the compressor head and motor are rigidly connected to the cooler and chassis, then structural stability is improved, but resonance occurs due to natural frequency alignment with 50-60 Hz operation frequency
Solution Approach 1:
The patent introduces a bearing beam as an intermediary component between the compressor head/motor and the cooler/chassis. This bearing beam acts as a mediator that decouples the drive chain from the fixed structure, allowing vibration isolation while maintaining structural support. The bearing beam with damping pads creates a flexible connection that prevents direct transmission of resonant vibrations.
Solution Approach 2:
The patent extracts the bearing support function from the rigid chassis structure by introducing a separate bearing beam. This separation allows the drive chain (compressor head and motor) to be isolated from the chassis, enabling independent vibration control and resonance avoidance while maintaining operational stability.
2Object-affected harmful factors
If damping pads are added between the support frame and bearing beam, then vibration isolation is improved, but device complexity increases
Solution Approach 1:
The patent employs damping pads as flexible elements between rigid components. These damping pads function as flexible interfaces that absorb and dissipate vibration energy while maintaining the structural connection. The use of flexible damping materials allows vibration isolation without requiring complex mechanical isolation systems.
3Duration of action of stationary object
If a bearing beam with damping pads is introduced, then resonance is avoided and service life is extended, but manufacturing complexity increases
Solution Approach 1:
The patent segments the compressor structure into distinct functional modules: the drive chain (compressor head and motor), the bearing beam with damping pads, and the fixed structure (cooler and chassis). This segmentation allows each component to be manufactured and assembled independently, simplifying the overall manufacturing process despite the increased number of components.
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 solution effectively isolates vibrations, preventing resonance and extending the service life of the centrifugal compressor by decoupling the drive chain from the chassis and external vibrations, ensuring the natural frequency avoids the problematic 50-60 Hz range.
Implementation Method 1
a first damping pad is provided between the support frame and the bearing beam. The first damping pad is fixedly connected to the support frame and the bearing beam, respectively
Data Source
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Figure 3~4
AI summary
The utility model discloses a centrifugal compressor, comprising a compressor head, a motor, a cooler, a support frame, a bearing beam and a chassis. The cooler and the support frame are fixedly mounted on the chassis. The bearing beam is disposed above the cooler and the support frame. The support frame supports the bearing beam. The compressor head and the motor are disposed above the bearing beam. The compressor head and the motor are fixedly mounted on the bearing beam. The centrifugal compressor of the present utility model avoids resonance problem and prolongs the service life of the complete machine.