Deep-Drawn Seat Ring for Relay Valve Sealing
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Solution Overview
Problem
The manufacture and fitting of the radially outer valve seat in relay valves for compressed-air systems are cumbersome and expensive due to the use of turned parts and locking rings.
Innovation Solution
A deep-drawn seat ring with a radially outer valve seat in the form of an axially protruding annular web, made from steel or aluminum sheet, is used, featuring spring tongues for axial fixation and a gable-shaped seal web for sealing, eliminating the need for locking rings and O-rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a turned part seat ring with locking ring is used for the radially outer valve seat, then the sealing and fixation are reliable, but the manufacture and fitting become cumbersome and expensive
Solution Approach 1:
The patent merges the seat ring and the sealing element into a single integrated component. The seal groove is directly formed in the seat ring, eliminating the need for separate O-rings or sealing elements. This integration simplifies the assembly process while maintaining reliable sealing, directly addressing the contradiction between reliability and ease of manufacture.
Solution Approach 2:
The patent extracts and eliminates the locking ring from the assembly by designing the seat ring with a deformation-resistant structure that maintains its positional stability without requiring additional fastening elements. This reduces the number of components and simplifies both manufacturing and assembly operations.
2Reliability
If multiple separate components (seat ring, locking ring, O-ring) are used for the radially outer valve seat, then the sealing and fixation are secure, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into the seat ring component itself: sealing (through the integrated seal groove), fixation (through the deformation-resistant structure), and support (through the annular geometry). This functional integration reduces component complexity while maintaining security of sealing and fixation.
Solution Approach 2:
The seat ring is designed as a multi-functional component that simultaneously provides structural support, sealing surfaces, and positional stability without requiring separate specialized components. This universality reduces overall device complexity while maintaining reliable performance.
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 simplifies and reduces the cost of producing and fitting the seat ring, enhancing dimensional stability and resilience while avoiding the complexity of traditional manufacturing methods.
Implementation Method 1
the sealing piston is pushed by a compression spring in the direction of the relay piston and of an annular, radially outer valve seat
Data Source
AI summary
A relay valve (1′) for a compressed-air system of a vehicle has a working pressure inlet, a working pressure outlet, a venting outlet and a controllable relay piston (19). The relay piston (19) is axially movably guided and, at one axial end, has an annular, radially inner valve seat (20). A sealing piston (9) is axially movably guided coaxially with respect to the relay piston (19). The sealing piston (9) is pushed by a compression spring (8) toward the relay piston (19) and an annular, radially outer valve seat (25), which is a part of a seat ring (24) fastened in an annular collar (23) of the housing bottom part (2). The seat ring (24) is a deep-drawn component shaped as a cylindrical pot of a metallic material. The radially outer valve seat (25) is an axially protruding annular web with a gable-shaped axial cross section.