Coaxial Hydraulic Coupling Bush for Pressure Relief and Limiting
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Solution Overview
Problem
Existing hydraulic coupling bushes face challenges in manufacturing due to the complex integration of pressure limiting and relief functions, which can lead to increased pressure and potential damage when heated, and previous solutions complicate the design by arranging pressure limiting valves away from the functional axis.
Innovation Solution
A hydraulic coupling bush design featuring separate coaxially arranged valve bodies and seats for pressure relief and limiting functions, allowing for independent manufacturing and simplification of these functions, with mechanical and hydraulic actuation mechanisms to manage pressure effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an integrated pressure limiting valve is arranged away from the functional axis, then pressure rise can be limited, but the overall design becomes complicated
Solution Approach 1:
The patent combines the pressure limiting valve with the relief seat valve device, integrating both pressure relief and pressure limiting functions into a single coaxial arrangement. The valve body serves dual purposes: relieving pressure during mechanical release and limiting pressure during normal operation, thereby simplifying the overall design while maintaining reliability
2Device complexity
If a single valve body is used for both pressure relief and pressure limiting functions, then the design is simplified, but manufacturing precision becomes challenging
Solution Approach 1:
The patent segments the valve body into distinct functional regions with separate valve seats and actuation mechanisms. The relief seat valve device and pressure limiting valve are arranged coaxially but operate independently through their respective valve bodies, allowing each to be manufactured and adjusted separately while maintaining precise control over their respective functions
3Reliability
If pressure medium is enclosed in the bush body with both seat valves closed, then sealing is achieved, but pressure can rise greatly when heated causing damage
Solution Approach 1:
The pressure limiting valve provides continuous feedback control on the pressure within the bush body. When pressure rises due to heating or other factors, the valve automatically opens to release excess pressure, maintaining pressure within safe operating limits while allowing the sealing function to operate effectively during normal conditions
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
This design simplifies the manufacturing and installation of pressure relief and limiting functions, preventing pressure buildup and potential damage by allowing for independent design and actuation of valve bodies, enhancing the operational reliability of the coupling bush.
Implementation Method 1
a hydraulically actuable valve body (56; 256) and a valve seat (62; 262) assigned to it, via the other actuation (in particular, hydraulic actuation) of which, which is dependent on the pressure in the interior space, the pressure in the interior space can be limited
Data Source
AI summary
A hydraulic coupling bush which is actuated in order to close or open the coupling includes a coupling housing and a bush body which displaceable therein and which has a plug space for receiving a coupling plug, a supply space for fluidic connection to an external supply channel, a low pressure space for fluidic connection to a pressure medium sink, and an interior space connected fluidically to the supply space, a supply seat valve device being provided, via the actuation of which a supply flow path can be configured between the supply space and the plug space, and a relief seat valve device being provided, via the mechanical actuation of which the interior space can be relieved of pressure toward the low pressure space, and via the hydraulic actuation of which, which is dependent on the pressure in the interior space, the pressure in the interior space can be limited.