Compressor Torsional Vibration Absorber Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Scroll compressors experience vibration issues due to torque ripples and external forces, which reduce their reliability and performance, as existing balance devices are inadequate in addressing torsional vibrations.
Innovation Solution
A vibration absorbing device is integrated into the compressor, featuring a rotational shaft with an eccentric portion, a main balance weight, a sub-balance weight, and a vibration absorbing unit that includes a pivot shaft and an absorber to dampen angular vibrations in the rotational direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If balance devices are mounted on the rotational shaft to compensate for imbalance, then the rotational balance is improved, but the device complexity increases and torsional vibrations are not adequately reduced
Solution Approach 1:
The vibration absorbing unit is nested within the rotational shaft structure, with the absorber positioned inside a cavity of the rotational shaft. This nested configuration allows the vibration absorption function to be integrated into the existing rotational shaft without adding external components, thereby reducing device complexity while maintaining the ability to reduce torsional vibrations.
Solution Approach 2:
A vibration absorber is introduced as an intermediary element between the source of torsional vibration (the motor and compression mechanism) and the rotational shaft. The absorber, connected via a pivot shaft, acts as a mediator that absorbs and dampens torsional vibrations, protecting the rotational shaft and other components from excessive vibrational stress.
2Stability of the object's composition
If balance weights are added to the rotational shaft, then the imbalance is compensated, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The balance weights and vibration absorption functions are merged into a single integrated structure. The rotational shaft incorporates both balance weights for static balance and a vibration absorber for dynamic torsional vibration reduction. This merging eliminates the need for separate balance devices and simplifies manufacturing and assembly processes.
Solution Approach 2:
The vibration absorber is nested within the rotational shaft cavity, and balance weights are integrated into the rotational shaft structure. This nested and integrated design reduces the number of separate components, simplifies manufacturing, and eliminates complex assembly steps while achieving both balance and vibration reduction functions.
3Reliability
If a vibration absorbing unit with pivot shaft and absorber is added, then the torsional vibrations are significantly reduced, but the device complexity increases
Solution Approach 1:
The vibration absorbing unit is nested within the rotational shaft, with the absorber positioned inside a cavity of the rotational shaft and connected via a pivot shaft. This nested configuration integrates the vibration absorption function into the existing rotational shaft structure without adding external components, thereby minimizing the increase in device complexity while achieving significant torsional vibration reduction.
Solution Approach 2:
The vibration absorber is designed to automatically respond to torsional vibrations without requiring external control or adjustment. The absorber freely rotates on the pivot shaft and naturally absorbs vibrations through its inertial properties, providing self-service vibration reduction that enhances reliability without adding complex control systems.
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 device significantly reduces rotational vibrations, enhancing the compressor's reliability and stability, and can be applied to various types of compressors, including scroll, rotary, and reciprocating compressors, improving their performance and reducing noise.
Implementation Method 1
a vibration absorbing unit for absorbing a vibration occurring in a rotational direction
Implementation Method 2
a main balance weight and a sub-balance weight
Implementation Method 3
a rotational shaft with an eccentric portion
Data Source
AI summary
A compressor and device for reducing vibration therefor is provided herein. The compressor includes a compression device having a compression chamber, and configured to receive, compress, and output a refrigerant, a drive motor configured to rotate the compression device to compress a refrigerant within the compression chamber, and a torsional vibration absorbing device attached to the motor and configured to absorb torsional vibration.