Servo-Valve Port Geometry for Faster Actuator Response
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Solution Overview
Problem
Existing servo-valves face challenges in achieving high response speed due to issues with material selection, mechanical strength, and manufacturing costs, which affect their control accuracy.
Innovation Solution
The servo-valve design incorporates non-circular openings for the discharge and inflow ports, allowing for a significant increase in the overlapping area between these ports during nozzle movement, thereby enhancing the responsiveness of the servo-valve and actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional circular openings are used for discharge and inflow ports, then the structure is simple and easy to manufacture, but the overlapping area changes slowly during nozzle movement, resulting in low response speed
Solution Approach 1:
The patent applies asymmetry by changing the opening shape from circular to non-circular (such as rectangular or elliptical). This asymmetric shape design causes the overlapping area between the discharge port and inflow port to change more rapidly during nozzle movement, directly improving the response speed of the servo-valve while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the geometric parameters of the openings by using non-circular shapes with specific dimensions and orientations. This parameter change optimizes the overlapping area characteristics during nozzle displacement, enabling faster fluid flow response without significantly complicating the manufacturing process.
2Productivity
If the overlapping area between discharge and inflow ports is increased rapidly, then the fluid flow rate improves and response speed increases, but the nozzle stroke must be shortened
Solution Approach 1:
The non-circular opening shapes are designed with asymmetric dimensions that maximize the overlapping area change rate. This allows the servo-valve to achieve the necessary fluid flow rate with a shorter nozzle stroke, as the asymmetric geometry creates more effective overlap during smaller displacements compared to conventional circular openings.
3Speed
If non-circular openings are used to improve response speed, then the overlapping area changes rapidly, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies optimized geometric parameters for the non-circular openings that balance performance and manufacturability. By carefully selecting dimensions and shapes, the patent achieves rapid overlapping area change while maintaining reasonable manufacturing precision requirements that can be met with conventional machining capabilities.
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 ensures a high response performance by ensuring a necessary fluid flow rate at an early stage, improving the servo-valve's responsiveness and actuator operation.
Implementation Method 1
displacing a nozzle toward left and right sides of a rotation axis based on an electromagnetic principle
Data Source
Figure 1
Figure 2(a)~2(d)
Figure 3(a)~3(e)
AI summary
The disclosure discloses a servo-valve (100) that controls a fluid discharged from a discharge port (221) of a nozzle (200) by displacing the nozzle (200) and drives an actuator. The servo-valve (100) includes a receiver (300) provided with a first inflow port into which the fluid discharged from the discharge port (221) flows. At least one of the discharge port (221) and the inflow port (311, 312) is an opening formed in a non-circular form such that the amount of change in the area of overlapping of the discharge port (221) and the inflow port (311, 312) occurring when the nozzle (200) is displaced from the initial position is larger than when the discharge port (221) and the inflow port (311, 312) are formed in circular forms of the same area. Since the change amount of the area of overlapping of the discharge port (221) and the inflow port (311, 312) occurring when the nozzle (200) is displaced from the initial position increases so that the fluid can flow into the inflow port (311, 312) in a short time, a response speed of the actuator is improved.