Compressor Assembly Bellows Mounting for Vibration Isolation
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Solution Overview
Problem
Existing compressor assemblies in vehicles face challenges in reducing the transmission of vibrations, which affects the reliability of the mounting system.
Innovation Solution
The proposed compressor assembly incorporates a flexible, hollow bellow as a bearing that connects the compressor to the air supply unit's housing structure. This bellow is pneumatically charged to change from an unpressurized state to a pressurized state, creating a positive lock with the mounting bracket, thereby reducing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid mounting bracket is used to securely fix the compressor, then the mounting reliability is improved, but vibration transmission to the vehicle increases
Solution Approach 1:
The patent applies a flexible bellow (a type of flexible shell) as the mounting bearing between the compressor and vehicle housing. This bellow can deform elastically to absorb vibrations while maintaining the structural connection, thus reducing vibration transmission to the vehicle while preserving mounting reliability.
Solution Approach 2:
The patent introduces a pneumatic charging system that inflates the bellow with gas or air. When charged, the bellow becomes stiffer to maintain structural stability; when uncharged, it becomes more flexible to dampen vibrations. This dynamic adjustment allows the system to optimize between mounting reliability and vibration reduction.
2Object-affected harmful factors
If a flexible bellow is used as a bearing to reduce vibration transmission, then vibration damping is improved, but the mechanical connection stability deteriorates
Solution Approach 1:
The patent makes the mounting system dynamic by allowing the bellow's stiffness to change based on pneumatic pressure. The system transitions from a static rigid connection to a dynamic adjustable connection, where the bellow can be charged to become stiffer for stability or left uncharged for vibration damping, thus resolving the contradiction between flexibility and stability.
Solution Approach 2:
The patent changes the physical parameter of the bellow (its internal pressure) to control its mechanical properties. By adjusting the pneumatic pressure inside the bellow, the system can modify the bellow's stiffness and damping characteristics, enabling it to provide both vibration reduction and stable mechanical connection as needed.
3Object-affected harmful factors
If the bellow is kept unpressurized to maintain flexibility for vibration absorption, then vibration damping is improved, but the positive lock with mounting bracket is lost
Solution Approach 1:
The patent implements periodic or conditional pneumatic charging of the bellow. The charging can occur periodically or in response to specific conditions (such as detected vibration levels or operational states), allowing the system to switch between flexible and rigid states as needed, thus maintaining both vibration damping capability and secure positive lock.
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 use of a pneumatically charged bellow effectively dampens and absorbs vibrations, leading to a more reliable mounting system with reduced vibration transmission between the compressor and the vehicle.
Implementation Method 1
The bellow being configured to be pneumatically charged from an unpressurized state into a pressurized state
Implementation Method 2
The use of a pneumatically charged bellow effectively dampens and absorbs vibrations
Implementation Method 3
the at least one mounting feature being configured to mechanically connect the bellow to the at least one mounting bracket in the pressurized state via a positive lock
Data Source
AI summary
The disclosure relates to a compressor assembly for an air supply unit of a vehicle. The compressor assembly includes: a compressor for providing pressurized air and having a compressor housing, at least one mounting bracket, wherein the at least one mounting bracket is fixed to the compressor housing, and, for each mounting bracket, one bearing for connecting the compressor assembly to a housing structure of the air supply unit. The bearing includes a flexible, hollow bellow, adapted to receive a gaseous medium, wherein the bellow includes at least one mounting feature, in particular recess, adapted to receive the mounting bracket, and the bellow is adapted to be pneumatically charged from an unpressurized state into a pressurized state, wherein the mounting feature is adapted to mechanically connect the bellow to the mounting bracket in a pressurized state via a positive lock.