Sound Absorber Pipe Clamp Structure for Curved Pipe Hole Protection
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Solution Overview
Problem
The existing methods for installing pipe fixing clamps in internal structural pipes of sound absorbers, which involve drilled holes, often result in costly damage and tearing, especially when applied to curved pipe portions, leading to increased investment costs.
Innovation Solution
A pipe fixing clamp with drilled holes is installed by cutting a predetermined interval in the curved pipe portion to create an exhaust gas flow space and connecting it with a metal band-shaped clamp fastened by a bolt and nut, featuring protruding rubbers for gas tightness and vibration attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilled holes are applied to curved pipe portion, then NVH tuning is achieved, but drilled holes are crushed or torn
Solution Approach 1:
A pipe fixing clamp is introduced as an intermediary component between the drilled holes and the curved pipe portion. The clamp distributes the mechanical stress across multiple drilled holes and prevents individual holes from being crushed or torn when the pipe bends, thereby maintaining both NVH tuning performance and hole integrity.
Solution Approach 2:
The pipe fixing clamp is installed beforehand on the curved pipe portion before the drilled holes are created. This preliminary action pre-establishes the structural support needed to prevent hole deformation during subsequent drilling and pipe bending operations.
2Strength
If upper/lower shell type is applied, then drilled hole damage is prevented, but costs are increased
Solution Approach 1:
The pipe fixing clamp uses a simple, inexpensive metal band structure with basic drilled holes instead of costly upper/lower shell components. While the clamp itself is a permanent component, its simple design allows for easy manufacturing and replacement if needed, significantly reducing overall system cost while maintaining protective function.
Solution Approach 2:
The protective function is segmented into a simple metal band with drilled holes rather than using complex upper/lower shell assemblies. This segmentation simplifies the structure, reduces material costs, and makes the component easier to manufacture and install while still providing the necessary protection against hole damage.
3Ease of manufacture
If pipe fixing clamp with drilled holes is used, then costs are reduced, but gas tightness must be maintained
Solution Approach 1:
Rubber seals are embedded within the metal band of the pipe fixing clamp to provide gas tightness. These flexible rubber elements conform to the pipe surface and fill gaps around the drilled holes, maintaining sealing performance despite the simplified metal band structure and the presence of multiple drilled holes.
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 solution significantly reduces costs and investment costs while preventing drilled hole damage and maintaining NVH performance comparable to traditional methods, ensuring effective gas flow and vibration reduction.
Implementation Method 1
Rubbers, which maintain gas tightness and prevent a pipe withdrawal, protrude at both sides of the drilled holes 101 formed in the pipe fixing clamp
Implementation Method 2
Rubbers, which maintain gas tightness and prevent a pipe withdrawal, protrude at both sides of the drilled holes 101 formed in the pipe fixing clamp
Data Source
AI summary
A structure is provided for installing a pipe fixing clamp installed in a sound absorber. A part of a curved pipe portion of an internal structural pipe of the sound absorber is cut to form an exhaust gas flow space. The pipe fixing clamp having multiple holes is connected to the exhaust gas flow space.