Primary Gasket Central Lip Segmentation to Prevent Flow Obstruction
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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 provide high fluid passage while maintaining structural strength, reducing the tendency for bending and rotation, ensuring stable abutment against radial walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the primary gasket is designed with a continuous central lip to maintain structural strength, then the gasket stability is improved, but the fluid passage resistance increases
Solution Approach 1:
The central lip is segmented into multiple discrete protrusions spaced along the axial direction, creating gaps between them. This segmentation allows fluid to pass through the gaps with minimal resistance while the individual protrusions maintain structural integrity and prevent excessive bending of the gasket.
2Strength
If the central lip is made thicker to reduce bending, then the structural strength is improved, but the fluid passage area is reduced
Solution Approach 1:
The central lip is divided into multiple thinner protrusions rather than one thick continuous structure. This segmentation provides sufficient bending resistance through the distributed protrusions while the spaces between them create adequate fluid passage area.
Solution Approach 2:
The central lip structure incorporates gaps between protrusions that function as porous pathways for fluid flow. This allows the structure to maintain strength while permitting fluid passage through the apparent 'porosity' of the segmented design.
3Ease of operation
If the primary gasket is allowed to rotate freely in the fluid communication configuration, then the ease of operation is improved, but the reliability deteriorates due to obstruction of fluid passage
Solution Approach 1:
The segmented protrusions create a structure that can move axially for operation but the distribution of protrusions along the circumference creates natural alignment features that prevent uncontrolled rotation, ensuring reliable fluid passage.
Solution Approach 2:
The protrusions are positioned asymmetrically or with specific spacing patterns that create preferential alignment orientations. This asymmetric arrangement allows the gasket to move freely in the axial direction while creating mechanical guidance that prevents rotation that would obstruct fluid passages.
Data Source
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).