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Simulation research on dynamic characteristics of scroll compressor with flexible clearance
Haifei Qiu1,2, Zhang Yifan1, Li Feiyang1
1School of Mechanical Engineering of XIJING University, Xi'an, China.
Plos One
|February 3, 2025
Summary
Tiny clearances in scroll compressors cause significant vibration and noise. However, larger clearances (0.07-0.1mm) reduce internal friction and avoid severe impacts, revealing optimal operating parameters for this rotating machinery.
Area of Science:
- Mechanical Engineering
- Rotational Machinery Dynamics
- Tribology
Background:
- Scroll compressors are high-speed, high-precision rotating machinery.
- Understanding the impact of internal clearance is crucial for their performance and longevity.
Purpose of the Study:
- To investigate the effects of varying transmission clearances on scroll compressor spindle dynamics.
- To model the kinematic pair considering two-state clearance and flexible contact conditions.
Main Methods:
- A vector model of the kinematic pair was developed based on two-state clearance.
- Dynamics simulations of the spindle were performed under flexible contact conditions with clearances ranging from 0 to 0.1mm.
Main Results:
- Flexible body simulations are more realistic than rigid body simulations for scroll compressors.
- Small clearances (0.01-0.04mm) lead to significant vibration and noise in critical components.
- Larger clearances (0.07-0.1mm) reduce collision amplitude and friction, mitigating severe impacts.
Conclusions:
- Spindle flexibility and transmission clearance significantly influence scroll compressor operation.
- Optimal clearance ranges exist to minimize adverse effects like vibration and noise.
- This study provides insights into the running mechanisms of scroll compressors with clearance.
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