Segmented Valve Seat for Brake Pump Distortion Control
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Solution Overview
Problem
Conveying devices for vehicle brake systems face issues with distortion due to the use of thin-walled stamped sheet metal parts, leading to increased reject rates and the need for specialized quality assurance, especially in components like valve seats that require tightness.
Innovation Solution
The valve seat is segmented into multiple parts to reduce warping risk, allowing for even stress distribution and the use of different materials, with centering elements for alignment and embossing along parting lines to simplify production and reduce material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thin-walled stamped sheet metal parts are used for valve seats, then production cost is reduced, but distortion and warping occur leading to increased reject rates
Solution Approach 1:
The valve seat is divided into multiple segments instead of being manufactured as a single piece. This segmentation allows each segment to be produced separately with controlled dimensions, reducing the risk of distortion in thin-walled stamped parts while maintaining cost-effectiveness through simplified manufacturing processes for individual segments.
2Strength
If valve seat is made as a single piece, then structural integrity is improved, but material usage increases and distortion risk rises
Solution Approach 1:
The valve seat is segmented into multiple parts that are assembled together, reducing the total material required compared to a single-piece construction. The segmentation allows for optimized material distribution and reduced waste while maintaining structural integrity through proper design of segment connections and support structures.
Solution Approach 2:
Different materials can be used for different valve seat segments, allowing optimization of material properties for specific functional requirements. This composite approach enables the use of lighter or less material in non-critical areas while maintaining strength and integrity in critical regions, thereby reducing overall material usage.
3Manufacturing precision
If valve seat segments are used, then distortion is reduced and material usage decreases, but assembly complexity increases
Solution Approach 1:
The valve seat is divided into segments that can be manufactured separately with controlled precision, reducing distortion. The segments are designed with simple connection features that facilitate straightforward assembly, minimizing the increase in assembly complexity while achieving the benefits of segmentation.
Data Source
AI summary
The device has a moveable piston provided in a receptacle to displace pressure fluids from a working chamber (5) with a non-return valve (9, 9`). The valve vents the chamber and temporarily separates a hydraulic connection between the chamber and a hydraulic channel. The non-return valve has a valve seat (11) and a valve body (12), where the valve seat is assembled from several valve seat segments (13, 14).