Modeling and optimization method for piston compressor vibration isolation system

Abstract

The present invention provides a modeling and optimization method for a piston compressor vibration isolation system. The method comprises the following steps: optimizing and obtaining a three-freedom-degree vibration isolation model; establishing a vibration equation; calculating a vibration force transfer rate; and optimizing a parameter of the vibration isolation system, so that vibration and noise reduction can be carried out on the piston compressor. The present invention establishes a mathematical model on a proposed kinetic model, solves an optimum value by using an optimization method-complex method, and acquires an ideal needed stiffness of a spring group, thereby achieving the aim of reducing noise and vibration of the compressor.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to the damping technology of piston compressors. Background technique [0002] The compressor is the power source and heart of the household refrigerator, and its vibration and noise are the main sources of the vibration and noise of the household refrigerator. The special working characteristics of the compressor make the compressor inevitably generate vibration and noise during the working process. The vibration caused by gas power, mechanical motion and electromagnetic is the main source of compressor vibration and noise. The reciprocating inertial force and rotational inertial force are formed when the crankshaft-connecting rod-piston mechanism moves, and they are important reasons for the mechanical vibration and noise of the piston compressor. When the natural frequency of the vibrating component is close to the integer multiple of the excitation frequency of the inertial ...

AI Technical Summary

Problems solved by technology

Spring sets with the same rigidity cannot well reduce the shock and vibration between the movement and the lower case

[0004] Moreover, if the elastic coefficient of the spring is too small or too large, it will have a great impact on the vibration isolation system of the compressor.

Too small will cause the spring to be too soft, so that the spring is easily compressed, not only cannot effectively support the system, but also cannot effectively reduce system vibration (the system will easily compress the spring and touch the bottom of the shell under the action of excitation)

Too much will cause the spring to be too hard, making it difficult for the spring to be compressed, not only easy to jump, but also the vibration damping effect is very poor

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