Valve Disk With Arc Recesses To Reduce Flow Resistance
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Solution Overview
Problem
Shutoff valves face increased flow resistance and vibration due to the thick valve disk and wake spaces caused by hubs in the flow, which generate eddies and increase resistance and vibration excitation.
Innovation Solution
The valve disk features arc-like recesses on the hubs to deflect flow, a center ridge with indentations for further optimization, and bent ribs on the back for rigidity, along with passages through the hubs for pressure compensation and reduced eddy formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the valve disk is designed thicker to withstand pressure difference, then the strength is improved, but the flow resistance increases
Solution Approach 1:
The valve disk employs varying thickness distribution with thicker regions at the periphery and thinner regions at the center, optimizing both strength and flow characteristics. The hub structure provides localized reinforcement where pressure loads are highest while maintaining thinner sections in flow-critical areas.
Solution Approach 2:
The invention introduces a third dimension by creating a three-dimensional hub structure with specific geometric features (radius ratios, contouring) that affect flow patterns in multiple directions, transforming a two-dimensional disk problem into a three-dimensional flow management solution.
2Stability of the object's composition
If the hubs are made wider to support the valve disk, then the structural stability is improved, but the wake space and eddy formation increase
Solution Approach 1:
The hubs are designed with curved, streamlined contours rather than sharp edges, featuring specific radius ratios (r1/D and r2/D) that promote smooth flow separation and reduce wake turbulence. The elliptical cross-section of hubs creates favorable pressure gradients that minimize eddy formation.
Solution Approach 2:
The hub geometry is pre-designed with specific dimensional ratios and contouring that anticipate and counteract flow separation tendencies, preventing eddy formation before it occurs by maintaining attached flow patterns through the hub regions.
3Loss of energy
If the valve disk is made thinner to reduce flow resistance, then the flow resistance is reduced, but the strength decreases
Solution Approach 1:
The valve disk employs varying thickness distribution with thicker regions at the periphery and thinner regions at the center, optimizing both strength and flow characteristics. The hub structure provides localized reinforcement where pressure loads are highest while maintaining thinner sections in flow-critical areas.
4Object-generated harmful factors
If the hubs are streamlined to reduce eddies, then the flow characteristics are improved, but the manufacturing complexity increases
Solution Approach 1:
The invention defines specific parameter ranges for hub geometry (radius ratios r1/D and r2/D between 0.05-0.2, elliptical cross-section dimensions) that balance streamlined flow characteristics with manufacturability. These standardized parameter ranges facilitate production while maintaining aerodynamic performance.
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 reduces turbulence and flow resistance, minimizes vibration hazards, and lowers activation moments for valve operation while maintaining structural integrity and weight efficiency.
Implementation Method 1
arc-like recesses running along an inside surface of the two hubs are provided in the valve disk on the front of the disk-like valve body provided with two protruding hubs, in order to deflect the flow around the hubs
Implementation Method 2
passages can be arranged running through the hubs. Because of these passages on both hubs, pressure compensation between the center of the valve disk and the wake space behind the hubs can be achieved
Data Source
AI summary
A valve disk with a disk-like valve body, which has a front with two protruding hubs and a back opposite the front. In order to permit improved flow around the valve disk and reduction of eddies on the outflow side, arc-like recesses running along an inside surface of both hubs are arranged on the front of valve body to deflect the flow around hubs.