Hydrogen Pressure Regulator Assembly to Protect Sealing Rings
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Solution Overview
Problem
Existing fluid pressure regulating devices for hydrogen fuel cell vehicles face challenges in maintaining sealing reliability due to the small molecular weight of hydrogen and high pressures, which can cause deformation and scratching of the insertion sealing ring during assembly.
Innovation Solution
A gas pressure regulating device for vehicles that includes a valve seat and a valve cavity housing, where the valve seat and valve cavity housing are relatively translated in an axial direction and assembled with a fixed structure to prevent relative rotation, thereby protecting the insertion sealing ring from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first-stage pressure regulating valve is assembled to the valve body through thread, then the valve can be easily assembled and disassembled, but the insertion sealing ring may be deformed and scratched due to relative rotation between valve seat and valve core
Solution Approach 1:
The patent applies preliminary action by pre-assembling the valve core to the valve seat in a controlled manner before final assembly. The valve core is first inserted into the valve seat with the insertion sealing ring in place, ensuring proper alignment and preventing relative rotation during subsequent assembly steps. This preliminary positioning prevents the sealing ring from being deformed or scratched while maintaining ease of assembly through the threaded connection.
2Device complexity
If the valve seat and valve cavity housing are assembled with relative rotation, then the assembly process is simple, but the insertion sealing ring is damaged due to rotation during assembly
Solution Approach 1:
The patent applies asymmetry by designing the valve core and valve seat with asymmetric features that prevent relative rotation during assembly. The valve core includes an inserted segment with a specific shape that fits into a corresponding asymmetric receptacle in the valve seat, creating a non-rotational fit. This asymmetric design ensures the insertion sealing ring remains undamaged while maintaining simple assembly procedures.
3Quantity of substance
If high pressure hydrogen storage system is used, then the hydrogen storage capacity is increased, but the sealing performance deteriorates due to hydrogen's small molecular weight and high pressure
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical parameters of the sealing system to accommodate high-pressure hydrogen. The insertion sealing ring is made from materials with specific molecular structure and physical properties that resist hydrogen permeation and deformation under high pressure. The design parameters including sealing ring material composition, hardness, and geometric dimensions are optimized to maintain sealing performance at 70 MPa hydrogen storage pressure.
Data Source
AI summary
The disclosure relates to a gas pressure regulating device for vehicle. A gas pressure regulating device for vehicle includes a valve seat and a valve cavity housing. The valve seat is provided with a valve core insertion hole, and a bottom of the valve core insertion hole is provided with a valve port. The valve cavity housing is detachably assembled with the valve seat. A valve core is guided and assembled in the valve cavity housing, the valve core has an inserted segment, the inserted segment is inserted in the valve core insertion hole, and the valve core is provided with a flow channel. An insertion sealing ring is provided between a hole wall of the valve core insertion hole and an outer peripheral surface of the inserted segment of the valve core. The valve seat and the valve cavity housing are relatively translated in an axial direction of the valve core insertion hole and are assembled in place in a relatively translational manner. A fixed structure is provided between the valve seat and the valve cavity housing, and the fixed structure is configured to relatively fix the valve seat and the valve cavity housing when the valve seat and the valve cavity housing are assembled in place.