Linear Compressor Elastic Member Positioning Vibration Reduction
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Solution Overview
Problem
Linear compressors experience increased vibration and noise due to rotation moments generated by the installation points of elastic members, which are spaced apart from the gravity center of the compressor main body, leading to vibration transfer to the mounting system.
Innovation Solution
The linear compressor design adjusts the installation heights and positions of elastic members to align their bottom ends closer to the gravity center, using lower and upper supporters to optimize the positioning and reduce the rotation moment, thereby minimizing vibration and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic members are installed with bottom ends spaced apart from the bottom of the shell, then vibration transfer to the shell is reduced, but rotation moment is generated causing increased vibration and noise
Solution Approach 1:
The invention changes the vertical position parameter of the elastic members' bottom ends from being spaced apart from the shell bottom to being positioned at or near the gravity center height. This parameter change eliminates the rotation moment while maintaining vibration isolation, resolving the contradiction between preventing vibration transfer and avoiding rotation moment generation.
Solution Approach 2:
The invention positions the bottom ends of the elastic members at the same vertical level as the gravity center of the compressor main body, creating an equipotential configuration where the gravitational force acts directly through the support points. This eliminates the moment arm and rotation moment, while the elastic members continue to provide vibration isolation.
2Object-generated harmful factors
If elastic members are positioned closer to the gravity center, then rotation moment is reduced, but shell space utilization may be affected
Solution Approach 1:
The invention optimizes the vertical position parameter of the elastic members to align with the gravity center, which minimizes the rotation moment. This parameter change is made to accommodate the existing shell internal dimensions, achieving vibration reduction without requiring additional shell volume or altering the overall compressor footprint.
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 reduces the rotation moment and pitching of the compressor main body, resulting in decreased vibration and noise within the compressor and transferred to the system, while efficiently utilizing the shell space.
Implementation Method 1
The compressor main body 20 is supported by elastic members 9 to be spaced apart from the bottom of the shell 1
Implementation Method 2
The permanent magnet 16 is linearly reciprocated between the inner stator 12 and the outer stator 14 due to a mutual electromagnetic force
Implementation Method 3
a spring 7 is elastically supported between a member connected to the piston 4 and the back cover 6
Data Source
AI summary
The present invention discloses a linear compressor including a shell, a compressor main body installed in the shell and composed of a cylinder, a piston reciprocated inside the cylinder to compress refrigerant, and a linear motor for driving the piston, and elastic members spaced apart from the bottom of the shell to support the compressor main body inside the shell. In this configuration, since installation positions of the elastic members approach a gravity center of the compressor main body, a rotation moment imparted to the elastic members can be lowered and vibration of the compressor main body can be reduced.