Gas Generator Fastening Section Design
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Solution Overview
Problem
Existing gas generator fastening methods, such as welding bolts or using separate clamps, are complex and costly, or increase the number of components, complicating the attachment to a carrier part.
Innovation Solution
A gas generator with an elongated outer housing featuring a dedicated fastening section, axially extending beyond the inner chambers, which is gas-tightly separated and designed with openings for simple and cost-effective fastening elements like screws or mounting plates, allowing secure attachment to a carrier part without interfering with gas flow or production functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded bolts are welded onto the outer housing, then the gas generator can be fastened to a carrier part, but the manufacturing process becomes complicated and expensive
Solution Approach 1:
The outer housing is segmented into a functional section and a separate fastening section. The fastening section is axially extended and gas-tightly separated from the inner chambers, allowing it to be designed independently for fastening purposes without affecting the gas generation function. This segmentation enables the fastening section to be manufactured separately and then integrated, simplifying the overall manufacturing process.
Solution Approach 2:
The fastening function is extracted from the main gas generator body by creating a dedicated fastening section that is gas-tightly separated from the inner chambers. This extracted fastening section can be manufactured using simpler processes (such as injection molding with integrated fastening features) rather than requiring complex welding operations on the pressure-containing housing.
2Reliability
If separate clamps are used to fasten the gas generator, then the gas generator can be connected to a carrier part, but the number of components and material usage increase
Solution Approach 1:
The fastening function is merged into the outer housing structure itself by creating an integrated fastening section with fastening elements (such as threaded holes or attachment features) directly formed in the housing wall. This eliminates the need for separate clamps or fastening brackets, reducing the total component count while maintaining secure fastening capability.
Solution Approach 2:
The outer housing serves multiple functions: it contains the gas-generating inner chambers and simultaneously provides the fastening section for mounting. The fastening section is designed to perform both the structural containment function and the fastening function, eliminating the need for dedicated separate fastening components.
3Reliability
If the fastening section is gas-tightly separated from inner chambers, then gas flow functions are preserved, but the structural design becomes more complex
Solution Approach 1:
The gas-tight separation is achieved by extending the outer housing in the axial dimension to create a dedicated fastening section that is spatially separated from the inner chambers. This axial extension creates a natural gas-tight barrier without requiring additional complex sealing structures, as the housing wall itself serves as the separation boundary.
Data Source
AI summary
A gas generator has an elongated outer housing, the wall of the outer housing surrounding at least one gas carrying inner chamber. An axially extending end section of the wall of the outer housing, which is separated from the inner chamber of the gas generator with regard to flow, is constructed as a fastening section and has at least one fastening structure for connecting the gas generator with a carrier part.