Bypass Directional Control Valve Port Diameter Optimization
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Solution Overview
Problem
Bypass directional control valves in existing pumping systems, such as those used in gas turbine fuel systems, experience undesirably high pressure losses, which affect the efficiency of fluid distribution and cooling processes.
Innovation Solution
A bypass directional control valve design featuring a valve sleeve with cylindrical inlet and outlet ports of varying diameters and a spool mechanism biased by a spring, where a pressure signal controls the spool's movement to direct fluid flow through either a heat exchanger or directly back to the pump, minimizing pressure losses by optimizing port alignment and flow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a bypass directional control valve is used to direct fluid flow in pumping systems, then fluid distribution control is improved, but pressure losses increase
Solution Approach 1:
The valve sleeve features inlet ports with a first diameter and outlet ports with a second diameter that is smaller than the first diameter. This local variation in port dimensions optimizes flow characteristics at different stages, reducing pressure losses while maintaining effective fluid distribution control.
Solution Approach 2:
The patent introduces a radial dimension to the port design by creating inlet ports that extend radially into the valve sleeve body and outlet ports that extend radially in opposite directions. This dimensional approach optimizes flow paths and reduces pressure losses while maintaining control functionality.
2Loss of energy
If port diameters are reduced to minimize pressure losses, then energy efficiency is improved, but flow capacity decreases
Solution Approach 1:
The valve design segments the flow paths into multiple outlet ports (first outlet ports and second outlet ports) with different diameter configurations. This segmentation allows optimization of pressure losses in each path while collectively maintaining sufficient flow capacity through the combination of multiple ports.
Solution Approach 2:
The patent employs different diameter parameters for inlet ports versus outlet ports, and further differentiates between first and second outlet ports. These parameter changes optimize the balance between pressure loss reduction and flow capacity maintenance by tailoring port dimensions to specific flow requirements.
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 reduces pressure losses and enhances control over fluid distribution, allowing for precise management of fluid flow to either the fuel oil cooler or directly back to the pump, thereby improving the efficiency of the fuel system's cooling and temperature regulation.
Implementation Method 1
A spring biases the valve spool in a first direction such that a first land blocks a first of the sets of outlet ports
Implementation Method 2
A pressure tap receives a pressure control signal to selectively cause the valve spool to move against the force of the spring
Implementation Method 3
A diameter of the inlet ports is greater than a diameter of the outlet ports. The outlet ports communicate to outlet openings in the housing
Data Source
AI summary
A bypass directional control valve has a valve sleeve, and two sets of outlet ports on each of two axial sides of the inlet ports. The outlet and the inlet ports all are formed to be cylindrical holes, and a diameter of the inlet ports is greater than a diameter of the outlet ports. A valve sleeve, a spool, a fluid flow system and a method are all also disclosed.