Pressure reduction valve
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Solution Overview
Problem
Pressure reduction valves experience noise generation and wear issues due to the swing movement of the valve piece, particularly in the minute opening degree range, where the vibration limiting member contacts the peripheral wall surface, leading to potential interference and deformation.
Innovation Solution
A pressure reduction valve design incorporating a vibration limiting member that generates an urging force to limit the swing movement of the valve piece, which is released when the valve piece moves beyond a predetermined displacement position, minimizing contact and wear on the valve main body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the vibration limiting member always contacts the peripheral wall surface to limit swing movement of the valve piece, then the swing movement and noise are suppressed, but the peripheral wall surface is scraped and worn by the projections sliding along it
Solution Approach 1:
The vibration limiting member is designed to dynamically change its contact state with the peripheral wall surface. The projections alternately contact and separate from the peripheral wall surface during valve operation, transforming the static contact into a dynamic interaction that limits wear while maintaining vibration suppression functionality.
Solution Approach 2:
The contact between the projections of the vibration limiting member and the peripheral wall surface occurs periodically rather than continuously. The projections engage with the peripheral wall surface during certain phases of valve operation and disengage during other phases, creating a periodic action pattern that reduces cumulative wear while maintaining noise suppression.
2Stability of the object's composition
If the projections of the valve support are always in contact with the peripheral wall surface, then the valve piece swing movement is limited, but the repeated slide movement causes scraping and wear of the peripheral wall surface
Solution Approach 1:
The valve support structure is designed with dynamic contact characteristics, where the projections alternately engage and disengage from the peripheral wall surface. This dynamic behavior maintains valve piece stability during operation while minimizing continuous contact that would cause wear to the valve main body.
Solution Approach 2:
The contact between the valve support projections and the peripheral wall surface occurs in periodic cycles rather than continuously. This periodic engagement provides necessary stability to the valve piece while reducing the cumulative scraping and wear effects on the peripheral wall surface.
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 effectively limits vibration and wear by releasing the urging force when the valve piece is beyond the predetermined position, reducing noise and maintaining the structural integrity of the valve main body, while maintaining the damper effect against radial vibrations.
Implementation Method 1
a vibration limiting member that limits vibration of the valve piece in a direction, which intersects with the axial direction, by generating an urging force
Implementation Method 2
The valve piece is supported by a valve support and is urged by a compression coil spring in a valve closing direction
Implementation Method 3
Each spring arm resiliently contacts the peripheral wall surface of the valve chamber through the projection. Therefore, the valve support always contacts the peripheral wall surface of the valve chamber through the projections, and the projections are slid along the peripheral wall surface of the valve chamber
Data Source
AI summary
A valve piece urging member urges a valve piece toward a valve closing side, at which an opening degree of a restriction passage is reduced by the valve piece. An actuation member exerts a drive force against the valve piece in a direction of moving the valve piece toward a valve opening side, at which the opening degree of the restriction passage is increased by the valve piece. A vibration limiting member limits vibration of the valve piece in a direction, which intersects with the axial direction, by generating an urging force for urging the valve main body at a location between the valve main body and the valve piece. When the valve piece is moved beyond a predetermined displacement position toward the valve opening side, the valve piece releases the urging force of the vibration limiting member.