Conical Fluid Coupling Support for Ultrahigh-Pressure Sealing
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Solution Overview
Problem
Conventional fluid coupling systems experience stress concentration and damage due to high pressure, leading to leakage and cavitation, which reduces their durability and reliability, especially in ultrahigh-pressure applications.
Innovation Solution
A piston pump design with a conical surface and tapered receiving member that distributes pressure uniformly across the main body, eliminating rapid cross-sectional surface expansion and reducing stress concentration, combined with a packing system to block high-pressure fluid and a valve structure with flat valve elements for improved sealing and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve seat surface is damaged causing fluid leakage, then the valve loses sealing function, but the leaked fluid causes wear of the valve seat surface or valve element and cavitation damage
Solution Approach 1:
The invention applies beforehand cushioning by designing the conical surface and tapered receiving member structure that distributes stress uniformly before damage can occur. This preventive design avoids the initial damage that would lead to leakage, wear, and cavitation, maintaining sealing function and preventing harmful effects before they start.
2Stress or pressure
If the main body of the fluid coupling is subjected to high pressure, then the coupling can handle high pressure applications, but the main body is likely to be damaged due to stress concentration
Solution Approach 1:
The invention applies parameter changes by modifying the geometric parameters of the main body through the conical surface design. The gradual change in cross-sectional area parameters distributes the pressure stress uniformly throughout the structure, allowing the coupling to handle high pressures while maintaining structural integrity and avoiding damage from stress concentration.
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 design enhances the durability of the fluid coupling system by evenly distributing compressive stress and preventing damage from high-pressure fluid, allowing for reliable operation in high-pressure environments (350 to 700 MPa) with extended valve element lifespan.
Implementation Method 1
The conical surface of the main body and the tapered surface of the receiving portion have the identical groove angles. Accordingly, the force by the pressure inside the cylinder is received by the entire tapered surface of the receiving member.
Implementation Method 2
a piston pump design with a conical surface and tapered receiving member that distributes pressure uniformly across the main body, eliminating rapid cross-sectional surface expansion and reducing stress concentration, combined with a packing system to block high-pressure fluid
Implementation Method 3
a valve structure with flat valve elements for improved sealing and durability
Implementation Method 4
With the main body having an enlarged diameter portion between the engaging portion and the conical surface, the enlarged diameter portion is radially enlarged relative to the engaging portion. As a result, no contact is caused between the enlarged diameter portion and the inner surface of the cylinder.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
To provide a fluid coupling that reduces the load on the main body of the fluid coupling so as to improve the durability. A fluid coupling (1) disposed in a pressure container (5) includes: a main body (2) having a through-passage (22) that is communicated with the pressure container (5) and allows flow of fluid; and a receiving member (6) disposed in the pressure container (5) to support this main body (2). The main body (2) has: an engaging portion (2o) that is formed on one side of the through-passage (22) and is disposed to be engaged inside the pressure container (5); and a conical surface (2j) formed on another side. The receiving member (6) has: a receiving portion (6b, 6c) having a tapered surface 6c with a groove angle identical to that of the conical surface (2j); and a circulation passage (6e, 6d) communicated with the other side of the through-passage (22). The conical surface (2j) of the main body (2) abuts on the tapered surface 6c of the receiving member (6) such that the receiving member (6) supports the main body (2).