Closed Compressor Rigid Support Design to Reduce Low-Speed Resonance
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Solution Overview
Problem
Existing closed compressors experience increased vibration during slow rotation operations, leading to noise and efficiency issues, particularly due to resonance phenomena between the elastic support members and the compressor body's mass and shape.
Innovation Solution
A closed compressor design featuring a compressor body with a curved support surface that contacts the inner bottom of the closed vessel, where the center of curvature is higher than the center of gravity, reducing vibration transmission and resonance, and potentially using additional features like restriction members and balance weights to stabilize the compressor body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic support members (springs) are used to support the compressor body, then vibration propagation is reduced, but resonance phenomenon occurs at very low rotation speeds causing significant vibration increase
Solution Approach 1:
The invention extracts and removes the elastic support members (springs) from the system, replacing them with a rigid support structure. This eliminates the resonance phenomenon that occurs between the spring constant and the compressor body's natural frequency at low rotation speeds, while still providing vibration isolation through the rigid support's damping characteristics.
Solution Approach 2:
The invention changes the support parameter from elastic (spring-based) to rigid, fundamentally altering the support characteristics. This parameter change eliminates the resonance issue at low speeds while maintaining vibration propagation reduction through the rigid structure's inherent damping properties.
2Use of energy by moving object
If the compressor operates at slow rotation speeds to improve energy saving, then power consumption is reduced, but vibration and noise increase significantly
Solution Approach 1:
By removing the elastic support members that cause resonance at low speeds, the invention enables the compressor to operate quietly and smoothly at slow rotation speeds, thus allowing energy-saving operation without the penalty of increased vibration and noise.
Solution Approach 2:
The invention replaces the elastic mechanical support system with a rigid support structure, fundamentally changing the mechanical characteristics of the compressor. This substitution eliminates the resonance phenomenon that plagued low-speed operation, enabling energy-efficient slow rotation without excessive vibration and noise.
3Object-affected harmful factors
If a flat surface portion is provided in the elastic support member to use lubricant viscosity for vibration attenuation, then vibration is reduced, but resonance still occurs at very low rotation speeds
Solution Approach 1:
The invention removes the elastic support members entirely, replacing them with a rigid support structure. This extraction eliminates the resonance problem that occurs at very low rotation speeds, while the rigid support provides alternative vibration attenuation mechanisms that are effective across all operating conditions.
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 significantly reduces vibration and noise during slow rotations, allowing for more efficient operation and reduced power consumption in refrigeration devices.
Implementation Method 1
vibration occurring in a closed compressor is likely to increase, and a problem arises in propagation of the vibration to a refrigerator body
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A closed compressor (10A) includes: a compressor body (100); and a closed vessel (200) in which the compressor body (100) is accommodated and oil is stored. The compressor body (100) has an electric element (110) and a compression element (120) that is driven by the electric element (110). The compression element (120) has a cylinder block (122) that forms a cylinder, a piston (123) that performs a reciprocating motion in the cylinder, and a crankshaft (124) that actuates the piston (123). The cylinder block (122) configures a bearing (125) that pivotally supports the crankshaft (124). The cylinder forms a compression chamber (126). The compressor body (100) has a support (300) that forms a curved surface (301). A contact portion, at which the curved surface (301) comes into contact with a receiving surface in the closed vessel (200), is formed.