Electric Compressor Vibration Damping with Variable Filling Rate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric compressors in vehicles experience increased vibration and noise due to resonance frequency mismatch between the compressor and the vibration damping members, leading to inefficient vibration suppression across a wide range of frequencies.
Innovation Solution
The electric compressor incorporates a design with vibration damping members whose filling rate can be adjusted to change their resonance frequency, allowing them to match the compressor's vibration amplitude, thereby shifting the resonance frequency away from the compressor's vibration frequency and reducing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration damping member with a fixed resonance frequency is used, then the structure is simple and easy to manufacture, but the vibration suppression effectiveness is insufficient when the resonance frequency coincides with the compressor vibration frequency
Solution Approach 1:
The vibration damping member is designed with a variable filling rate in its internal cavity, allowing the resonance frequency to change dynamically based on compression force. When the compressor vibrates, the filling rate adjusts automatically, shifting the resonance frequency away from the vibration frequency to suppress resonance. This dynamic adjustment mechanism resolves the contradiction by making the damping member adaptive rather than static.
Solution Approach 2:
The resonance frequency of the vibration damping member is made changeable by varying the filling rate of the cavity with compressible material. The filling rate serves as a controllable parameter that directly affects the resonance frequency. By changing this parameter in response to vibration conditions, the system achieves effective vibration suppression without requiring a completely complex multi-component structure.
2Reliability
If the resonance frequency of the vibration damping member is changed to avoid coincidence with compressor vibration frequency, then vibration suppression improves, but the vibration frequency components cover a wide range making single-frequency adjustment insufficient
Solution Approach 1:
The vibration damping member utilizes the dynamic response of the compressor vibration itself to adjust the filling rate. When vibration occurs, the varying compression force automatically changes the filling rate, which in turn shifts the resonance frequency to avoid coincidence with the vibration frequency. This self-adjusting mechanism provides adaptability across wide frequency ranges without requiring multiple fixed-frequency damping members.
Solution Approach 2:
The vibration damping member serves itself by using the compressor's own vibration-induced compression forces to adjust its filling rate and resonance frequency. The system automatically detects vibration conditions through the compression force changes and self-regulates the damping characteristics, eliminating the need for external control systems or multiple pre-configured damping elements.
3Ease of manufacture
If a fixed filling rate is used in the vibration damping member, then manufacturing is simpler, but the resonance frequency cannot be adjusted to match changing vibration conditions
Solution Approach 1:
The filling rate is designed to vary dynamically in response to compression force changes during compressor operation. The cavity structure allows the compressible material to be compressed and expanded automatically, changing the filling rate without mechanical actuators or complex control systems. This passive dynamic adjustment maintains manufacturing simplicity while achieving frequency adaptability.
Solution Approach 2:
The vibration damping member automatically adjusts its own filling rate using the compression forces generated during normal compressor operation. The system self-regulates the damping characteristics without requiring external intervention, complex manufacturing processes, or additional control mechanisms, thus maintaining ease of manufacture while providing adaptability.
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 approach effectively suppresses compressor vibrations and noise by dynamically adjusting the resonance frequency of the damping members, ensuring reduced vibration amplitude and noise levels across the entire periphery of the compressor.
Implementation Method 1
the resonance frequency of the vibration damping member coincides with the vibration frequency of the compressor, the amplitude of vibration of the compressor is increased and the increased vibration is transmitted
Implementation Method 2
a plurality of vibration damping members accommodated in the respective accommodating spaces
Data Source
AI summary
There is provided an electric compressor to be fixed an object including a compression mechanism, an electric motor, a housing, a supporting member, and a plurality of vibration damping members. One of the housing and the supporting member has a recess and the other of the housing and the supporting member has a projection that is disposed in the recess and engaged with the recess to form a plurality of accommodating spaces on opposite sides of the projection, respectively. A filling rate of each vibration damping member in the corresponding accommodating space is changeable. There is also provided a method for manufacturing the electric compressor, including preparing a plurality of vibration damping members, choosing one of the vibration damping members, and providing the supporting member to the outer peripheral surface of the housing while accommodating the chosen vibration damping members in the respective accommodating spaces.