Intermediate Shaft Vibration Control in Rotary Systems
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Solution Overview
Problem
In rotary systems, maintaining a suitable distance between compressor and turbine while minimizing vibration is challenging due to extended shafts, which can lead to excessive vibration and operational inconvenience.
Innovation Solution
A rotary system with an intermediate shaft device having a main body connected to both rotary shafts and supported by multiple bearing devices, including radial and thrust bearings, along with a lubricating oil supply unit and an exterior cover to prevent lubricant scattering and enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If an extended rotary shaft is connected with a coupling to maintain distance between compressor and turbine, then the distance of separation between rotary machines can be maintained, but vibration of the rotary shaft becomes excessive
Solution Approach 1:
An intermediate shaft device is introduced as a mediator between the compressor and turbine rotary shafts. This intermediate shaft is supported by multiple bearing devices (radial bearings and thrust bearings) that act as intermediaries to support the shaft and suppress vibration while maintaining the required separation distance between the compressor and turbine.
2Object-affected harmful factors
If multiple bearing devices are used to support the intermediate shaft, then vibration is inhibited, but device complexity increases
Solution Approach 1:
The bearing support system is segmented into multiple functional units: radial bearings for supporting radial loads and thrust bearings for axial loads. This segmentation allows each bearing type to perform its specific function optimally, reducing vibration through specialized support while keeping the overall design systematic and manageable.
3Object-affected harmful factors
If the intermediate shaft main body has varying radial dimensions, then unstable vibration in bearing devices is inhibited, but manufacturing precision requirements increase
Solution Approach 1:
The intermediate shaft main body is designed with non-uniform radial dimensions, creating local quality variations along its length. This design provides different stiffness characteristics at different locations, which helps inhibit unstable vibration in the bearing devices. The varying radial dimensions create optimal stiffness distribution to suppress vibration while maintaining rotational balance.
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 configuration maintains the required separation distance between compressor and turbine while effectively inhibiting vibration and ensuring instrument safety by stabilizing the intermediate shaft and utilizing existing lubrication systems.
Implementation Method 1
a plurality of bearing devices slidably supporting the intermediate shaft main body
Implementation Method 2
a lubricating oil supply unit supplying a lubricating oil
Data Source
AI summary
A rotary system capable of maintaining a distance of separation between two rotary machines and inhibiting vibration in an intermediate shaft connecting rotary shafts of the two rotary machines to each other. The rotary system includes a first rotary machine having a first rotary shaft, a second rotary machine having a second rotary shaft, and an intermediate shaft device having an intermediate shaft main body having a first end portion connected to the first rotary shaft and a second end portion connected to the second rotary shaft and rotating about an axis and a plurality of bearing devices slidably supporting the intermediate shaft main body.