Valve Sealing Arrangement with Integrated Wiper and Holder
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Solution Overview
Problem
The existing sealing arrangements for fittings, such as lifting or flap valves, are cumbersome to assemble and disassemble due to the need for separate components like wipers and O-rings, and their production is costly due to the use of multiple parts.
Innovation Solution
A simplified sealing arrangement with a one-piece holder integrated with a wiper and a preassembled elastomer sealing element, which forms a complete seal with the spindle and housing part, eliminating the need for additional seals and separate wipers, and is designed for easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing arrangement with separate wiper and sealing element is used, then the sealing function is achieved, but the assembly complexity and production cost increase
Solution Approach 1:
The holder and wiper are merged into a single integrated component. The holder is designed with a cylindrical projection that receives the wiper, forming a unified structure that eliminates the need for separate assembly of these parts while maintaining the sealing function.
Solution Approach 2:
The sealing element is pre-assembled onto the holder in a form-fitting manner before the entire sealing arrangement is installed. The bead of the sealing element is already positioned in the groove of the holder, allowing for quick installation as a complete unit without complex assembly steps.
2Reliability
If multiple separate components are used in the sealing arrangement, then the sealing function is achieved, but the production cost increases
Solution Approach 1:
The holder and wiper are combined into one molded plastic component, reducing the number of parts that need to be manufactured, inventory managed, and assembled. This integration significantly reduces production costs while maintaining the necessary sealing functionality.
Solution Approach 2:
The integrated holder-wiper component serves multiple functions simultaneously: it provides structural support, guides the spindle, protects the sealing element, and performs the wiping function. This multi-functionality eliminates the need for separate components and reduces overall production cost.
3Reliability
If an additional O-ring seal is used between housing part and holder, then the sealing is improved, but the device complexity and part count increase
Solution Approach 1:
The sealing function is integrated directly into the holder-wiper-sealing element assembly. The bead of the sealing element forms a sealing surface against the wall of the stepped bore, eliminating the need for a separate O-ring while achieving complete sealing.
Solution Approach 2:
The separate O-ring component is extracted from the design and its sealing function is transferred to the integrated sealing element. The bead of the sealing element directly contacts the housing part wall, removing the intermediate O-ring and reducing part count.
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 reduces assembly complexity and production costs by integrating the wiper and sealing element into a single component, ensuring effective sealing without additional seals, facilitating easier handling and reduced part count.
Implementation Method 1
which are provided at their free end with lugs (18) which protrude radially outwardly and which fit into a circumferential groove (11) of the housing part (2) into which the sealing arrangement (6) is insertable, wherein the expanding legs (9) are elastically deformable
Implementation Method 2
The form-fitting hold of the sealing element on the holder takes place by means of a circumferential bead of the sealing element which is formed in the sense of an O-ring and which lies in a peripheral groove on the outside of the holder. Towards the outside, the bead forms a sealing surface on the wall of the stepped bore.
Data Source
Figure 1
Figure 2
AI summary
The armature has a sealing arrangement (6) designed as a pre-assembled component and with a holder (7) provided with a radial elastically deformable expanding arms. The holder is axially held in a housing part (2) by a form closure in a secure manner. A sealing element (8) encompasses a spindle (4) by a sealing ring in a sealed manner. The sealing element is securely mounted in the holder in axially movable manner, and a deflector encloses the spindle, where the deflector and the holder are designed as a single piece. The sealing element rests at a wall of a stepped hole and at the spindle.