Hydraulic Coupler Rear Chamber Pressure Compensation
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Solution Overview
Problem
Current fluid transmission couplers require increasing effort for coupling as residual pressure in the circuit increases, and they often have complex and costly pressure compensation systems, as well as mechanical cumbersome central locking systems that are ineffective in accidental actuation scenarios.
Innovation Solution
A fluid transmission fitting with a rear chamber that opposes fluid thrust to maintain the main valve in position, allowing for minimal and pressure-independent coupling effort, featuring a cam system with pressure relief and a radial seal design to ensure complete valve opening and user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional coupling systems are used, then coupling functionality is achieved, but coupling effort increases incrementally as residual pressure increases
Solution Approach 1:
The patent extracts the pressure compensation function from the coupling operation itself by introducing a separate rear chamber that compensates for residual pressure independently. This allows the coupling effort to remain constant regardless of pressure changes in the main fluid passage.
Solution Approach 2:
The rear chamber acts as a counterbalancing mechanism that opposes the thrust of fluid from the male coupler. By pressurizing the rear chamber, the system creates a counterforce that maintains the main valve in position, effectively canceling out the effect of residual pressure on coupling effort.
2Ease of operation
If pressure compensation systems are added to maintain constant coupling effort, then coupling ease is improved, but device complexity increases
Solution Approach 1:
The patent merges the pressure compensation function with the existing valve structure by integrating the rear chamber into the female coupler body. This combination approach achieves pressure compensation without adding separate complex mechanisms, as the rear chamber shares structural elements with the main valve assembly.
Solution Approach 2:
The rear chamber automatically compensates for pressure changes during coupling without requiring external control systems. The chamber pressurizes itself through the oblique pipe connection, providing self-regulating pressure compensation that simplifies the overall system while maintaining constant coupling effort.
3Reliability
If central locking systems are implemented for safety, then user safety is improved, but mechanical complexity increases
Solution Approach 1:
The patent replaces traditional mechanical central locking systems with a hydraulic retention mechanism. The rear chamber pressure creates a hydraulic lock that maintains the main valve in position, providing safety through fluid pressure rather than mechanical locking components, thereby reducing mechanical complexity.
Solution Approach 2:
The system uses hydraulic pressure in the rear chamber to maintain valve position and ensure safety. This hydraulic retention mechanism eliminates the need for complex mechanical locking systems, as the pressurized fluid itself provides the retention force needed for safe operation.
4Productivity
If the main valve is allowed to move freely for complete opening, then fluid flow is improved, but valve position stability deteriorates under pressure
Solution Approach 1:
The rear chamber provides a counterbalancing pressure that opposes the thrust of fluid from the male coupler. This counterpressure allows the main valve to remain stable in its open position even under high flow conditions, preventing unintended valve movement while maintaining complete opening for optimal fluid flow.
Solution Approach 2:
The system changes the pressure parameter in the rear chamber to maintain valve stability. By adjusting the rear chamber pressure, the system can counterbalance varying fluid thrust forces, ensuring the valve remains stable in the open position across different operating conditions while maintaining complete opening for maximum fluid flow.
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 solution minimizes coupling effort regardless of residual pressure and ensures user safety by maintaining the main valve open, reducing mechanical complexity and operational effort while preventing accidental uncoupling.
Implementation Method 1
the fitting has a rear chamber which, when pressurized, allows the main valve of the female coupler to be maintained in position by opposing the thrust of the fluid coming from the male coupler
Implementation Method 2
featuring a cam system with pressure relief
Data Source
AI summary
A fluid transmission fitting (100) includes a female coupler (47) inserted within a hydraulic feeding block (1), and a male coupler (48), which can be coupled to the female coupler (47). The hydraulic feeding block (1) includes at least one hydraulic line (49) and a draining line (50), and a lever (4) integral with a cam (7) adapted to relieve the pressure from a chamber (54) inside the female coupler (47) and adapted to uncouple the male coupler (48) from the female coupler (47). The female coupler (47) including a pressure relief valve (51), which puts the chamber (54) into connection with the draining line (50).