Pressure-Equalized Valve Piston for Fast Low-Force Switching
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Solution Overview
Problem
Existing valve devices face challenges with functional reliability and rapid switching between media connection points due to cross-section reduction, leading to unwanted flow noises and high actuation forces, which can damage seals and require complex actuation mechanisms.
Innovation Solution
The valve device incorporates a pressure equalization mechanism that maintains a uniform diameter for the valve control piston, ensuring secure sealing and reduced actuation forces, allowing for rapid switching and obstruction-free operation, with a hollow piston design and damping bores for hydraulic damping and pressure equalization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a baffle is glued into the head tube to reduce the cross-sectional area of the inlet opening, then flow noises are reduced, but actuation forces increase and switching speed decreases
Solution Approach 1:
The valve control piston is segmented into a hollow piston body and a separate valve closure member, allowing the inlet opening cross-section to be reduced without requiring a baffle that increases actuation force. The segmented design enables noise reduction while maintaining low actuation forces.
Solution Approach 2:
The valve device achieves rapid dynamic switching between connected and disconnected states by eliminating the baffle structure. The dynamics of the valve control piston are optimized to switch rapidly without the resistance caused by glued baffles, reducing actuation forces while maintaining noise reduction.
2Object-affected harmful factors
If a baffle is glued into the head tube to reduce the cross-sectional area of the inlet opening, then flow noises are reduced, but functional reliability decreases
Solution Approach 1:
The harmful baffle structure is completely removed from the system. Instead of gluing a baffle into the head tube, the invention uses a hollow valve control piston design that reduces inlet opening cross-section without compromising functional reliability, ensuring obstruction-free operation.
Solution Approach 2:
The invention replaces the permanent glued baffle with a removable valve control piston assembly that can be easily replaced if needed, improving functional reliability while achieving noise reduction through the hollow piston design.
3Reliability
If high pressure is applied to seat the valve piston on the valve seat, then sealing is improved, but gasket damage occurs
Solution Approach 1:
The hollow valve control piston creates pressure equalization between the inlet opening and the actuation side of the piston. This equipotentiality ensures that sealing pressure is distributed evenly, achieving reliable sealing without concentrating excessive pressure on the gasket that would cause damage.
Solution Approach 2:
The invention changes the pressure distribution parameters by using the hollow piston design, transforming the pressure profile from concentrated high pressure to distributed moderate pressure, thereby achieving sealing without gasket damage.
4Reliability
If the valve control piston is designed with non-uniform diameter to improve sealing, then sealing is improved, but manufacturing complexity increases
Solution Approach 1:
The valve control piston is designed with uniform diameter throughout its length, simplifying manufacturing. Sealing is achieved not through diameter variation but through the hollow structure and proper positioning of the valve closure member, maintaining reliability while improving ease of manufacture.
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 enhances functional reliability, reduces actuation forces, and prevents hydraulic pressure surges, enabling rapid and fault-free switching between media connection points while maintaining a uniform seal, thus improving operational efficiency and manufacturing simplicity.
Implementation Method 1
the valve control piston (33) is guided in the valve housing (3) with pressure equalization by at least one pressure equalizing mechanism (35) with respect to the fluid pressure at the pressure supply inlet (P)
Implementation Method 2
the pressure equalizing mechanism has a first seal (37) that causes the valve control piston (33) to assume the same diameter on its media control side (39) as another, second seal (41) of the pressure equalizing mechanism (35) that engages on the valve control piston (33)
Implementation Method 3
The valve control piston is designed as a hollow piston with damping bores for hydraulic damping and pressure equalization
Data Source
AI summary
A valve device (1) controls media flows of any type by a valve control piston (33) guided in a longitudinally movable manner in a valve housing (3) and controlling a media connection between media connection points (9, 11) in the valve housing (3). One media connection point is a pressure supply inlet (P). Another media connection point is a load outlet (A). The valve control piston (33) is guided in the valve housing (3) with pressure equalization by an equalizing apparatus (35) with respect to the media pressure at the pressure supply inlet (P).