Pressure Regulating Valve Spherical Fit Alignment
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Solution Overview
Problem
High-pressure regulators face issues with coaxial misalignment between the piston and seat ring, leading to deteriorated sealing strength and increased pressure regulation values due to piston inclination, requiring forceful centering and pressure increase during valve closing.
Innovation Solution
A pressure regulating valve design featuring a piston with a hollow portion and a valve element with a spherical fit portion that can accommodate inclination, allowing for easy centering and fixation without the need for forceful alignment, thereby preventing a rise in pressure regulation values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the piston is forced to reduce inclination for centering between the seat ring and piston seat during valve closing, then the sealing strength between seat ring and piston seat is improved, but the pressure regulation value in the outlet pressure chamber rises
Solution Approach 1:
The fit portion of the valve element is given a spherical shape that fits into a corresponding spherical recess in the piston. This curved surface design allows the valve element to accommodate piston inclination through rotational adjustment while maintaining proper sealing contact, eliminating the need for forceful centering that would increase outlet pressure
Solution Approach 2:
The spherical fit portion enables the valve element to dynamically adjust its orientation relative to the piston, allowing it to adapt to inclination variations during operation. This dynamic adjustment capability maintains sealing effectiveness without requiring forced alignment that would raise pressure regulation values
2Device complexity
If the piston and seat ring are coaxially misaligned, then the device complexity is reduced, but the sealing strength between seat ring and piston seat deteriorates
Solution Approach 1:
The spherical fit portion and recess combination provides a self-aligning mechanism that tolerates coaxial misalignment between the piston and seat ring. The curved surfaces guide the valve element into proper orientation through contact, maintaining sealing strength without requiring high-precision manufacturing and assembly
Solution Approach 2:
The spherical geometry enables the valve element to self-align with the seat ring through its own weight and operational forces, automatically compensating for misalignment without requiring external alignment mechanisms or procedures
Data Source
AI summary
In a pressure regulating valve, a piston is provided, in an end on a side closer to a seat, with a recessed portion opening on the side closer to the seat, a valve element including: a tip portion contactable with the seat; a columnar retaining part inserted in the recessed portion; and a press-fit portion protruding radially outward from an outer peripheral surface of the retaining part and being press-fitted in an inner peripheral surface of the recessed portion. The press-fit portion has a spherical shape.