L-Shaped Hydraulic Sealing Ring Rolling Contact
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Solution Overview
Problem
Existing high-pressure and high-temperature hydraulic sealing rings require complex assembly procedures, often necessitate the use of insertion rings, and typically need complete replacement after disassembly, leading to potential catastrophic failures and mechanical issues.
Innovation Solution
A sealing ring with a modified 'L' cross-section, featuring a leg, foot, and external heel with a convex profile, allowing for rolling contact and secondary sealing protrusions that enable easy installation and reusability, eliminating the need for insertion rings and complex assembly procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing rings are used in high-pressure hydraulic assemblies, then sealing reliability is maintained, but assembly complexity increases due to difficult and precise assembly procedures including selective heating and/or cooling
Solution Approach 1:
The sealing ring utilizes elastic deformation under hydraulic pressure to transition from a non-sealing state during assembly to a sealing state during operation. The ring's cross-sectional geometry is designed to deform elastically when subjected to hydraulic pressure, causing the sealing faces to conform to the cylinder and piston surfaces, thereby achieving reliable sealing without complex thermal assembly procedures
Solution Approach 2:
The sealing ring features a curved or rounded sealing profile rather than sharp edges. This curvature allows the sealing surfaces to gradually conform to the mating surfaces under pressure, distributing contact stresses and enabling self-sealing through elastic deformation, which simplifies assembly while maintaining sealing reliability
2Reliability
If traditional sealing rings are used, then initial sealing is achieved, but complete replacement is required after disassembly due to failure to achieve acceptable resealing
Solution Approach 1:
The sealing ring is designed with dynamic sealing characteristics where the sealing effectiveness develops and improves under operating hydraulic pressure. The ring transitions from an initial state during assembly to a fully sealed state during operation through elastic deformation, allowing the sealing surfaces to conform to any minor irregularities. This dynamic adaptation enables successful reassembly and resealing after disassembly, eliminating the need for complete replacement
Solution Approach 2:
The sealing ring geometry is pre-configured with specific cross-sectional dimensions and curvature radii that are designed to produce the desired elastic deformation under operating pressure. This preliminary design ensures that when the ring is installed and subjected to hydraulic pressure, it automatically achieves the optimal sealing configuration without requiring additional adjustment or modification during assembly or reassembly
3Ease of operation
If insertion rings are used during assembly, then sealing ring installation is facilitated, but device complexity increases due to additional components and procedures
Solution Approach 1:
The design eliminates the need for separate insertion rings by incorporating the insertion function directly into the sealing ring's own geometry. The sealing ring's cross-sectional shape and material properties are engineered to allow it to be compressed and inserted into the groove, then expand to its functional sealing shape under hydraulic pressure. This integration removes the additional insertion ring component and simplifies the assembly process while maintaining ease of installation
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
The sealing ring provides reliable sealing with reduced assembly complexity, enhanced reusability, and improved performance under varying hydraulic pressures, preventing catastrophic failures and mechanical issues.
Implementation Method 1
the external heel has a convex profile to form a 'rolling' line of sealing contact with a seat in a cylinder or piston to which the ring body is installed
Implementation Method 2
the sealing ring including: an annular ring body of 'substantially L' cross-section, with a leg portion and a foot portion interconnected by an external heel having a curved profile
Data Source
AI summary
A high-pressure sealing ring for hydraulic assemblies has a substantially—“L”-shaped body with a leg and foot, where an external heel-portion is designed to provide a “rolling” line of sealing contact with the seat in the cylinder or piston in which it is seated.