4/3-Way Valve Control Edges for Fast High-Flow Switching
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Solution Overview
Problem
Existing 4/3-way continuous valves face challenges in achieving quick switching and high flow rates while maintaining efficient flow direction alignment, leading to suboptimal flow force compensation and potential flow reversals.
Innovation Solution
The design features a 4/3-way continuous valve with a valve sleeve and piston configuration that ensures all control edge openings are aligned in the same flow direction, providing a continuously open flow passage with variable cross-section control through overlapping control edges, preventing flow reversals and enhancing flow force compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the valve piston is designed to control flow by varying the opening degree of flow openings, then flow regulation is achieved, but switching speed is reduced and flow rate is limited
Solution Approach 1:
The valve is segmented into distinct functional openings: flow openings that remain substantially completely open for high flow rate and quick switching, and control edge openings that handle flow regulation. This segmentation allows the flow openings to maximize productivity while control edge openings manage flow variation, resolving the contradiction between flow rate and switching speed.
Solution Approach 2:
The flow regulation function is extracted from the main flow path by using control edge openings that interact with control edges of the valve piston. This separates the high-flow passage (flow openings) from the regulation mechanism (control edge openings), allowing the main flow path to operate at maximum capacity while switching quickly, while regulation is handled by the extracted control edge mechanism.
2Adaptability or versatility
If control edge openings are designed to allow flow reversal depending on valve piston position, then bidirectional flow control is achieved, but flow force compensation deteriorates
Solution Approach 1:
Instead of allowing flow reversal through control edge openings as in conventional valves, this invention inverts the approach by designing control edge openings and flow recesses such that flow always moves in the same direction (from flow opening through flow recess to control edge opening). This inversion maintains adaptability for bidirectional valve control while eliminating flow reversal, thereby improving flow force compensation.
3Ease of operation
If the valve design allows flow reversal in control edge openings, then operational flexibility is improved, but actuating forces increase
Solution Approach 1:
The invention inverts the conventional approach by preventing flow reversal in control edge openings while maintaining operational flexibility through the valve piston's ability to connect different flow paths. By ensuring unidirectional flow through control edge openings, flow force compensation is improved, which reduces the actuating forces required, thus resolving the contradiction between operational flexibility and actuating force requirements.
Data Source
Figure 1a
Figure 1b~1c
Figure 2
AI summary
The invention relates to a hydraulic or pneumatic valve, which is designed as a 4/3-way continuous valve and has a valve sleeve and a movable valve piston (4; 4') arranged inside the valve sleeve (2; 2'), wherein the valve sleeve has at least a first (P1) and at least a second flow opening (As), each of which is open towards a flow recess (8, 10; 28) in the valve piston (4), and at least a first control edge opening (ASK) and at least a second control edge opening (BSK), each of which is designed to interact with a control edge (16) of the valve piston (4; 4') adjacent to one of the flow recesses (8, 10; 28), wherein the valve sleeve (2; 2') with the flow openings (P1, As) and the control edge openings (ASK, BSK) and the valve piston (4; 4') with the Flow recesses (8, 10; 28) are designed such that all control edge openings (ASK, BSK) define the same flow direction.