Fluid Control Block Cavity Geometry for Low Pressure Drop
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Solution Overview
Problem
Fluid control devices often experience significant pressure drops and flow resistance, which complicates their structural design and functionality.
Innovation Solution
The design incorporates a block with a mounting cavity and fluid passage featuring a progressively increasing sub-bottom wall and strategically placed valve ports to minimize pressure drop, allowing for efficient fluid flow and reduced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional fluid control device structures are used, then fluid flow control is achieved, but pressure drop and flow resistance are significant
Solution Approach 1:
The sub-bottom wall is designed with progressive height increase from the first end (near valve port) to the second end, creating localized flow guidance in the critical region where fluid enters the mounting cavity. This gradual height progression locally optimizes flow patterns without requiring complete structural redesign
Solution Approach 2:
The progressive height increase of the sub-bottom wall creates a curved, gradual transition surface instead of abrupt edges or sharp corners. This curved geometry guides fluid flow smoothly into the mounting cavity, reducing turbulence and vortex formation that would increase pressure drop
2Ease of operation
If valve ports are positioned on the passage wall periphery, then fluid communication is enabled, but flow resistance increases
Solution Approach 1:
The sub-bottom wall acts as an intermediary flow guidance structure between the valve port and the mounting cavity interior. It mediates the fluid transition by providing a gradual height progression that smooths the flow path, reducing direct turbulence at the valve port entrance
Solution Approach 2:
The sub-bottom wall structure is pre-configured with progressive height increase before fluid enters the mounting cavity. This preliminary flow guidance prepares the fluid stream for smooth entry, preventing vortex formation and reducing resistance before the fluid reaches the main cavity space
Data Source
AI summary
A block and a fluid control device includes a first mounting cavity. A wall portion of a first fluid passage is provided with a first valve. A first mounting-cavity bottom wall includes a first sub-bottom wall, and the height of the first sub-bottom wall increases as the first sub-bottom wall extends from a first end of the first sub-bottom wall toward a second end of the first sub-bottom wall. The pressure drop across the block and the fluid control device is low.