Compressor Vibration Control via Segmented Anti-Vibration Supports
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Solution Overview
Problem
Existing transport chillers face challenges in balancing anti-vibration performance with sufficient fixed strength to withstand traveling vibrations of a vehicle, as they struggle to effectively isolate and support the compressor while maintaining structural integrity.
Innovation Solution
A transport chiller design featuring a lower anti-vibration support member with a lower elastic body and an upper anti-vibration support member with a higher spring constant, where the compressor is supported with its centroid interposed between both ends, suppresses vibration displacement and ensures fixed strength by using rubber vibration isolators and a metal band to manage vibrations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the compressor is supported by elastic bodies to isolate vibration, then anti-vibration performance is improved, but fixed strength with respect to traveling vibration deteriorates
Solution Approach 1:
The compressor support system is segmented into two distinct support members: a lower anti-vibration support member with a first elastic body and an upper anti-vibration support member with a second elastic body. This segmentation allows each support member to have different spring constants optimized for specific vibration frequencies, resolving the contradiction between vibration isolation and fixed strength by addressing different vibration modes separately.
Solution Approach 2:
Different parts of the support system are given different local qualities through varying spring constants. The lower support member has a smaller spring constant for isolating low-frequency traveling vibrations, while the upper support member has a larger spring constant for maintaining fixed strength and suppressing high-frequency compressor vibrations. This local differentiation resolves the contradiction by optimizing each region for its specific function.
2Strength
If the spring constant of the upper elastic body is made larger than the lower elastic body, then fixed strength is improved, but vibration displacement of the lower part increases
Solution Approach 1:
The support system dynamically responds to different vibration frequencies through its segmented elastic bodies. The lower elastic body with smaller spring constant dynamically isolates low-frequency traveling vibrations, while the upper elastic body with larger spring constant dynamically suppresses high-frequency compressor vibrations. This dynamic differentiation resolves the contradiction by allowing each support member to optimize its response based on vibration frequency.
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 vibration displacement and prevents damage to connected pipes, ensuring both anti-vibration performance and fixed strength, particularly by setting the upper elastic body's spring constant above the vehicle's travel frequency, thereby enhancing the compressor's stability and reducing pipe damage.
Implementation Method 1
Each of the flanges is fixed to the bracket via an elastic body, and thereby it is suppressed that vibration accompanying the driving of the compressor is transmitted to the bracket
Implementation Method 2
a lower anti-vibration support member that supports a part below a centroid of the compressor with respect to a main body and has a lower elastic body, and an upper anti-vibration support member that supports a part above the centroid of the compressor with respect to the main body and has an upper elastic body
Data Source
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AI summary
The present invention provides a transport refrigerating machine in which a compressor is supported in a manner such that vibration of the compressor can be controlled and such that the compressor has securing strength against travel vibrations. The present invention is equipped with: a compressor (10) which compresses a refrigerant for cooling a transport container disposed in a vehicle; leg portions (18) which support the compressor (10) below the center of gravity G upon a bottom wall portion (14a) of a frame (14), and which are provided with bottom-portion anti-vibration rubber; and a metal band (20) which supports the compressor (10) above the center of gravity G against a vertical wall portion (14b) of the frame (14) via top-portion anti-vibration rubber (22). The spring constant of the top-portion anti-vibration rubber (22) is larger than the spring constant of the bottom-portion anti-vibration rubber of the leg portions (18) .