Internal Poppet Assembly Layout for Lower-Force Cam Valves
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Solution Overview
Problem
Conventional poppet assemblies in control valves require greater biasing force to overcome fluid pressure and lead to increased wear due to their arrangement outside the valve chamber.
Innovation Solution
A poppet assembly is arranged within the valve chamber, comprising at least two poppet carriages, two poppets, and a spring, which are biased radially outward from the camshaft to engage chamber ports, allowing for efficient movement between closed and open positions using a camshaft assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the poppet assembly is arranged outside the valve chamber, then the structure is simpler to implement, but greater biasing force is required to overcome fluid pressure and wear increases
Solution Approach 1:
The poppet assembly is moved from an external arrangement to an internal arrangement within the valve chamber, changing the spatial dimension of the component layout. This dimensional repositioning allows the poppet to operate in a different pressure environment and reduces the biasing force requirement while maintaining structural feasibility through the camshaft actuation mechanism
2Ease of manufacture
If the poppet assembly is arranged outside the valve chamber, then installation is easier, but wear on the poppet assembly increases
Solution Approach 1:
Relocating the poppet assembly inside the valve chamber changes the operational environment and reduces exposure to high-velocity fluid flow and particulate matter, thereby reducing wear. The camshaft actuation mechanism compensates for the more complex installation by providing precise control and positioning
Solution Approach 2:
The camshaft acts as an intermediary mechanism that enables precise control of the poppet assembly movement. This intermediary mechanism reduces direct contact and friction between the poppet and valve seat by controlling the timing and force of engagement, thereby reducing wear while maintaining sealing effectiveness
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 configuration reduces the required biasing force and minimizes wear on the poppet assembly, enhancing the operational efficiency and durability of the control valve.
Implementation Method 1
a spring that biases the poppet carriage radially away from the camshaft, toward the first end position
Data Source
AI summary
The present disclosure provides a control valve including a camshaft and one or more poppet assemblies. In general, the one or more poppet assemblies can include a poppet carriage that is moveable by the camshaft between a first end position and a second end position, a poppet coupled to the poppet carriage, and a spring configured bias the poppet carriage radially away from the camshaft, toward the first end position, in a first radial direction relative to a camshaft axis. According to some aspects, the camshaft can include a cam lobe that engages the poppet carriage to move the poppet carriage from the first end position toward the second end position in a second radial direction that is opposite the first radial direction.