Three-Port Logic Valve Layout for Simpler Hydraulic Actuator Control
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Solution Overview
Problem
Existing logic valves for hydraulic actuators have complex structures, leading to high manufacturing costs and reduced reliability, and require integration with directional valves, making them less versatile for different types of hydraulic actuators.
Innovation Solution
A simplified logic valve design with a valve body, slider, and elastic means that allows fluid communication between ports to be managed efficiently, reducing complexity and enabling use in various hydraulic actuators without significant structural modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex logic valve structure is used to manage hydraulic actuators, then the valve can handle multiple operating configurations, but the manufacturing cost increases and reliability decreases
Solution Approach 1:
The valve body is segmented into distinct port regions (first port for pressurized fluid input, second port for actuator connection, third port for discharge) that can independently manage fluid flow paths. This segmentation allows the valve to handle multiple operating configurations through simpler, dedicated flow channels rather than a complex integrated structure.
Solution Approach 2:
The logic valve is designed with universal functionality to work with different types of hydraulic actuators (single-acting, double-acting, linear, rotary) through its standardized three-port configuration. The valve body and logic element combination can manage various operating modes (supply, discharge, bidirectional control) without requiring structural modifications, thus achieving versatility without increasing complexity.
2Adaptability or versatility
If a complex logic valve structure is used to manage hydraulic actuators, then the valve can handle multiple operating configurations, but manufacturing costs increase
Solution Approach 1:
The valve body is segmented into distinct port regions (first port for pressurized fluid input, second port for actuator connection, third port for discharge) that can independently manage fluid flow paths. This segmentation allows the valve to handle multiple operating configurations through simpler, dedicated flow channels rather than a complex integrated structure.
Solution Approach 2:
The logic element is designed as a simple, replaceable component with basic geometric features (circular and annular surfaces) that can be manufactured using standard machining processes. The simplicity of the logic element structure reduces manufacturing costs while maintaining the capability to control multiple operating configurations through its interaction with the valve body ports.
3Ease of operation
If integration with directional valves is required, then the logic valve can manage fluid flow direction, but the overall system complexity increases
Solution Approach 1:
The logic valve integrates the functions of flow direction control and logic-based actuator management into a single unified component. The valve body incorporates all necessary flow paths (supply, discharge, bidirectional) and the logic element provides automatic flow direction control based on pressure differential, eliminating the need for separate directional valves and reducing system integration complexity.
Solution Approach 2:
The logic element automatically controls fluid flow direction based on the pressure differential between the first port (pressurized fluid) and the second port (actuator chamber). This self-regulating mechanism eliminates the need for external directional control mechanisms or complex integration with separate directional valves, as the valve manages its own flow direction internally through the logic element's response to pressure conditions.
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 results in lower manufacturing costs, increased reliability, and flexibility for different hydraulic actuator types, with a simpler structure that is easier to implement and operate safely.
Implementation Method 1
a return spring interposed between the valve body and the slider and acting on the slider itself along said working direction in the direction of removal from the third port
Implementation Method 2
when the pump supplies pressurized working fluid along the supply line that through the first port acts on the first surface of the logic element and overcomes the force of the return spring causing its movement along the work direction
Data Source
AI summary
A logic valve for management of a hydraulic actuator comprising: a valve body with a hollow seat which extends along a work direction and communicates with a first port adapted for receiving a pressurized working fluid, a second port adapted for fluidly coupling with an operating chamber of the hydraulic actuator, and a third port adapted for discharging the working fluid; a slider within the hollow seat movable along the work direction; and a spring between the valve body and the slider and oriented to act on the slider along the work direction in the direction away from said third port, wherein the slider is movable between a first operating configuration fluidly coupling the second and third ports and excluding fluid communication between them and the first port, and a second operating configuration fluidly coupling the first and second ports and excluding fluid communication between them and the third port.