Directionally Biased Valve with Enlarged Inlet
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Solution Overview
Problem
Conventional bidirectional valves face challenges with hysteresis, undesired flow patterns, and manufacturing tolerance issues due to frictional bias and momentum, requiring tight manufacturing tolerances and being sensitive to entrance edge conditions.
Innovation Solution
A valve design featuring a first flow body with an enlarged inlet to reduce resistance in the downstream direction, offset passages between flow bodies to enhance directional bias, and a stacked configuration with static flow bodies to maintain constant chamber volumes, promoting efficient bidirectional fluid flow with reduced upstream resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple moving parts (e.g., translatable piston) are used to change flow path volume, then bidirectional flow control is achieved, but frictional bias and momentum cause hysteresis and undesired flow patterns
Solution Approach 1:
The invention extracts the moving piston component from the system and replaces it with a static flow body containing strategically positioned orifices. This eliminates frictional bias and momentum effects while maintaining bidirectional flow control capability through the fixed geometric configuration of the orifices.
Solution Approach 2:
The invention changes the control mechanism from dynamic (moving piston changing volume) to static (fixed orifices with different geometries). The bidirectional flow control is achieved by having different orifice sizes and shapes that create different flow resistances in opposite directions, eliminating hysteresis while maintaining adaptability.
2Manufacturing precision
If tight manufacturing tolerances are used to ensure proper valve function, then flow control precision is improved, but manufacturing complexity and sensitivity to edge conditions increase
Solution Approach 1:
The invention uses asymmetric orifice geometries within a static flow body to achieve bidirectional flow control. The asymmetric design allows for different flow characteristics in opposite directions without requiring tight tolerances on moving parts. The enlargement at the inlet of passages further reduces sensitivity to manufacturing variations by providing a larger transition zone.
Solution Approach 2:
Instead of using tight tolerances on moving parts to achieve precision, the invention inverts the approach by using loose-tolerance static orifices with deliberately asymmetric geometries. The flow control precision is achieved through the geometric asymmetry of the orifices themselves rather than through precise positioning of moving components.
3Ease of operation
If conventional bidirectional valve designs are used, then flow regulation is achieved, but device complexity and assembly difficulty increase due to multiple moving parts
Solution Approach 1:
The invention removes all moving parts (pistons, seals, springs) from the valve design, replacing them with a single static flow body containing multiple orifices. This dramatically simplifies the device structure while maintaining full bidirectional flow regulation capability through the fixed geometric configuration of the orifices.
Solution Approach 2:
The invention merges multiple functions (bidirectional flow control, pressure regulation, flow direction biasing) into a single static flow body component. The multiple orifices with different geometries perform multiple control functions simultaneously, eliminating the need for separate moving parts and reducing assembly complexity.
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 design achieves a 20% restriction against upstream flow and improved manufacturability, reducing sensitivity to manufacturing tolerances and flow variations, while maintaining efficient downstream fluid flow with a discharge coefficient of approximately 0.85.
Implementation Method 1
The passage of the first flow body is configured to direct fluid flow in a downstream direction defined from the inlet to the outlet. The inlet includes an enlargement configured to provide decreased resistance to fluid flow in the downstream direction relative to flow in an upstream direction opposite the downstream direction.
Data Source
AI summary
A valve for regulating fluid flowing bidirectionally therethrough includes a first flow body defining a passage configured to direct fluid flow in a downstream direction defined from the inlet to the outlet. The inlet includes an enlargement configured to provide decreased resistance to fluid flow in the downstream direction relative to flow in an upstream direction opposite the downstream direction.