Primary Gasket Central Lip Structure for Stable Cylinder Fluid Passage
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Solution Overview
Problem
Existing primary gaskets in cylinder assemblies for hydraulic and electrohydraulic systems are prone to excessive bending and rotation, leading to fluid passage obstruction and compromised operation due to overstressing in the fluid communication configuration.
Innovation Solution
A primary gasket with a central lip featuring protuberances and discharges that ensure high fluid passage while maintaining structural strength, reducing bending and rotation, by allowing seamless abutment against radial walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the primary gasket is overstressed in the fluid communication configuration, then the outer lip and central lip can bend excessively allowing fluid passage, but this leads to rotation of the primary gasket in the primary housing which compromises the return to fluid isolation configuration
Solution Approach 1:
The central lip is segmented into multiple discrete lips spaced along its length, allowing each segment to independently manage stress and bending while maintaining overall structural integrity. This segmentation prevents excessive bending that would cause rotation while still allowing controlled flexing for fluid passage.
Solution Approach 2:
The primary gasket is constructed from composite materials that combine high flexibility for sealing with high tensile strength to resist bending and rotation. This composite structure allows the gasket to withstand overstress conditions without rotating in the housing while maintaining fluid passage capability.
2Productivity
If the central lip is made more flexible to reduce bending resistance, then fluid passage is improved, but the gasket becomes more prone to rotation in the primary housing
Solution Approach 1:
The central lip is divided into multiple discrete lips spaced along its length. This segmentation allows the structure to be flexible enough for fluid passage while distributing stress to prevent excessive bending and rotation. The spaced arrangement provides both flexibility and structural reinforcement.
Solution Approach 2:
The thickness and material properties of the central lip are optimized to achieve the right balance between flexibility and stability. By carefully controlling these parameters, the gasket maintains positional stability while still allowing sufficient flexing for fluid passage when needed.
3Ease of manufacture
If the central lip structure is simplified to reduce manufacturing complexity, then production cost decreases, but bending resistance and structural strength are reduced leading to rotation
Solution Approach 1:
The segmented central lip structure can be manufactured as an integrated feature during standard gasket production processes. While the structure appears complex, it can be formed in a single molding or extrusion operation, maintaining ease of manufacture while providing the necessary structural strength and bending resistance.
Data Source
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AI summary
The present invention relates to a primary gasket (1) for a cylinder assembly (100), wherein said cylinder assembly (100) comprises a cylinder (101) and a float (102) slidingly housed in a float housing (104) delimited by a cylinder wall (103) of said cylinder (101) for pressurizing a fluid, wherein said primary gasket (1) comprises an annular body (2) configured to be accommodated in a primary gasket housing (105) defined in said cylinder wall (103), wherein the primary gasket housing (105) is delimited radially by an axial housing wall (107) and axially by a first radial housing wall (108) and a second radial housing wall (109) connected as an undercut to said axial housing wall (107), wherein said annular body (2) comprises an inner lip (4), a central lip (5), an outer lip (6), and a back portion (3), wherein the back portion (3) comprises a back abutment surface (13) configured to abut against the first radial housing wall (108) of said primary gasket housing (105), wherein the inner lip (4), the central lip (5), and the outer lip (6) extend from the back portion (3) in the axial direction (X-X) spaced apart from one another in the radial direction (R-R) from the opposite side of the back abutment surface (13), wherein the inner lip (4) is configured to form a dynamic and static seal on the float (102), wherein the outer lip (6) is configured to form a seal with said axial housing wall (107), wherein the central lip (5) comprises an annular root (14), which extends axially between said back portion (3) and a root edge (15), wherein the central lip (5) comprises a plurality of protuberances (10, 9), wherein each protuberance (10, 9) projects axially from said root edge (15), wherein said plurality of protuberances (10, 9) and said root edge (15) define a plurality of discharges (8), wherein each discharge (8) is delimited by each protuberance (10) and a first neighboring protuberance (9) thereof of said plurality of protuberances (10, 9) and by a free edge portion of said root edge (15), which extends between each protuberance (10) and the first neighboring protuberance (9) thereof, wherein each protuberance (10, 9) extends circumferentially by one protuberance extension (G), wherein each discharge (8) extends circumferentially by one discharge extension (L), wherein a sum of each discharge extension (L) is greater than a sum of each protuberance extension (G).