| 摘要(英) |
Due to the increasing demand for quality of life, global warming and weather anomalies are becoming more and more serious, people′s demand for air conditioning has increased significantly, while the tolerance of vibration noise has become relatively harsh, rotary compressor with crankshaft mechanism to make its compressor small size and simple processing advantages, so it is widely used. The internal structure of the rotary compressor is caused by the movement imbalance and vibration of the structure under the action of the eccentric mass of the crankshaft and the variable load of the gas. In addition to improving the performance of the machine, it is necessary to improve the problem of vibration noise, so it is necessary to study how to suppress the vibration of the compressor. Particle is a passive and nonlinear energy dissipation damping. Its advantages include high temperature resistance in harsh environment, and few modifications to the original structure. It often used to improve processing quality and vibration noise problems. The concept design of Tuned Particle Damper (TPD) is proposed, combining the advantages of Main Counterweight and Damping Particles used to correct the vibration of rotary compressors. Through the centrifugal force generated by the crankshaft of rotary compressors and the characteristics of the particles easily attached to the cavity wall, a damper that can be filled with different proportions of particles in different chambers is designed to achieve both the dual effect of counterweight and vibration suppression. In addition, two-way coupling dynamic analysis with TPD compressors is also performed through the Discrete Element Method (DEM) and Multi-body Dynamics (MBD). In order to understand the vibration suppression performance of TPD, the dynamic characteristics of the compressor are discussed in view of the particle size, particle shape, friction coefficient and recovery coefficient. And obtains the best design parameters through particle rheological effects and energy consumption analysis. Finally, it evaluate the TPD vibration suppression effect from the rotor observation point of the motion. |
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