Turbo-compressor Vibration Isolation Coupling
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Solution Overview
Problem
Conventional turbo-compressors directly transmit vibrations from the variable vane to the motor, exceeding allowable vibration values and potentially damaging the motor.
Innovation Solution
A vibration isolation mechanism is introduced between the drive shaft and output shaft, allowing them to rotate together while moving in a vibration direction, using intersecting grooves and projections to absorb radial vibrations and prevent transmission to the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive shaft and output shaft are completely fixed together with a coupling, then the torque transmission is reliable, but vibration from the variable vane is directly transmitted to the motor
Solution Approach 1:
A vibration isolation mechanism is introduced as an intermediary element between the drive shaft and output shaft. This mechanism includes a coupling body with radial grooves and corresponding projections that allow controlled relative movement while maintaining torque transmission. The intermediary structure absorbs vibration energy through elastic deformation and friction in the groove-projection interfaces, preventing direct vibration transmission to the motor while preserving reliable torque transfer.
Solution Approach 2:
The coupling design changes the mechanical connection parameters from rigid fixed connection to flexible connection with controlled degrees of freedom. The radial grooves and projections create a connection that permits limited radial and axial movement, transforming the coupling stiffness characteristics. This parameter change allows the system to accommodate vibration-induced displacements while maintaining sufficient stiffness for torque transmission.
2Manufacturing precision
If the coupling completely fixes the drive shaft and output shaft, then axial center alignment is precise, but vibration exceeds allowable values
Solution Approach 1:
The coupling body acts as an intermediary that maintains axial center alignment through its structured groove and projection geometry while simultaneously providing vibration isolation. The symmetric arrangement of grooves and projections ensures proper alignment is maintained during operation, while the friction-based connection allows sufficient movement to reduce vibration transmission to acceptable levels.
3Object-affected harmful factors
If a vibration isolation means is added between drive shaft and output shaft, then vibration transmission is suppressed, but device complexity increases
Solution Approach 1:
The vibration isolation function is merged with the torque transmission function in a single integrated coupling structure. The coupling body simultaneously performs both functions through its unified design featuring radial grooves and projections that enable both vibration absorption and reliable power transmission, eliminating the need for separate vibration isolation components and reducing overall system complexity.
Solution Approach 2:
The coupling structure is designed with multi-functionality, serving both as a torque transmission element and a vibration isolation device. The same coupling body that connects the drive shaft to the output shaft also provides vibration attenuation through its groove-projection mechanism, making the component universal and avoiding additional complexity from separate specialized 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
This configuration effectively suppresses vibration transmission to the motor, minimizing its impact and ensuring operational safety.
Implementation Method 1
a vibration isolation means is arranged between the drive shaft and output shaft and the coupling, to connect the drive shaft and output shaft to each other so that they rotate together and allow the drive shaft and output shaft to move in a vibration direction
Data Source
AI summary
A turbo-compressor including a variable vane that adjusts the flow rate of a fluid, a drive shaft that is connected to the variable vane and is rotated to drive the variable vane, a motor that rotationally drives the drive shaft, and a coupling that couples the drive shaft with an output shaft of the motor. Between the drive shaft and output shaft and the coupling, a vibration isolation means is arranged to connect the drive shaft and output shaft to each other so that they rotate together and allow the drive shaft and output shaft to move in a vibration direction.