Compressor Damping Structure for Driving Unit Deflection Control
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Solution Overview
Problem
Linear compressors in automotive applications face issues with deflection of the driving unit due to acceleration, deceleration, and inclination of the vehicle, leading to noise and potential damage, which conventional damping devices fail to adequately address.
Innovation Solution
A hermetically sealed compressor with a damping device having an arc-shaped contactable region inside the housing that matches the shape of the driving unit, allowing controlled deflection and reducing noise by maintaining a form-fit state during vehicle maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a spring element is used to suppress vertical vibration of the driving unit, then vertical vibration is suppressed, but horizontal deflection during acceleration and deceleration increases
Solution Approach 1:
The damping function is segmented into multiple independent damping devices positioned at different locations (front, rear, left, right sides) of the driving unit. Each damping device handles specific directional forces, allowing the system to address both vertical vibration and horizontal deflection independently rather than relying on a single spring element that cannot handle multi-directional forces effectively.
Solution Approach 2:
Damping devices are introduced as intermediary elements between the driving unit and the housing. These damping devices act as mediators that absorb and dissipate horizontal deflection forces during acceleration and deceleration, preventing direct force transmission to the housing while maintaining the driving unit's operational stability.
2Ease of operation
If the spring element is designed to be relatively soft for low rotational speed, then operational comfort is improved, but deflection of the driving unit increases
Solution Approach 1:
The stiffness parameter of the support system is changed by replacing the single spring element with multiple damping devices that have optimized damping coefficients. This allows the system to maintain softness for comfort during normal operation while providing sufficient resistance against horizontal deflection forces through the combined effect of multiple damping elements.
Solution Approach 2:
The damping devices utilize composite damping materials that combine viscoelastic properties to achieve both softness for comfort and sufficient rigidity for deflection control. The composite material structure allows the damping devices to be relatively soft during normal operation yet provide adequate resistance against acceleration and deceleration forces.
3Stability of the object's composition
If a conventional damping device is provided, then some vibration damping is achieved, but rotational impact noise during start and stop increases
Solution Approach 1:
The first contactable region of the damping device is designed with a curved or arc-shaped surface instead of a flat surface. This curved geometry allows the damping device to accommodate rotational movement of the driving unit during start and stop processes, enabling smooth contact with the housing and preventing impact noise while maintaining vibration damping effectiveness.
Solution Approach 2:
The damping device is designed with dynamic contact capabilities, where the curved first contactable region allows the contact point to move dynamically as the driving unit rotates during start and stop. This dynamic design enables the damping device to adapt to changing operational conditions, providing continuous damping without creating impact noise from fixed contact points.
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
The solution effectively suppresses deflection and reduces noise generation by enabling controlled movement of the driving unit, enhancing stability and minimizing impact-related damage.
Implementation Method 1
at least one damping device for suppressing and limiting a deflection of the driving unit is provided inside the housing and connected to the driving unit
Implementation Method 2
at least one damping device for suppressing and limiting a deflection of the driving unit is provided inside the housing and connected to the driving unit
Data Source
AI summary
A compressor comprises a sealed housing and a driving unit arranged inside the housing. At least one damping device for suppressing and limiting a deflection of the driving unit is provided inside the housing. The damping device is connected to the driving unit. The damping device has a first contactable region facing and at a distance from an inner surface of the housing. The housing comprises a second contactable region corresponding to the first contactable region of the damping device. The second contactable region comprises an inner surface and an outer surface. The shape of the second contactable region of the housing matches the shape of the first contactable region of the damping device. The first contactable region of the damping device comprises at least an arc-shaped circumferential contactable region. The damping device reduces the noise and damage that may occur as a result of the deflection of the driving unit and improves the stability of the driving unit.