Cam-Driven Flow Regulating Valve for High-Pressure Gas Wear Reduction
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Solution Overview
Problem
Conventional flow rate regulating valves for high-pressure gas face challenges in withstanding high loads and experiencing wear due to the pressure acting on screw mechanisms, requiring large actuators or air valves and leading to durability issues.
Innovation Solution
The proposed solution involves a flow rate regulating valve that uses a cam plate and cam follower mechanism to convert rotational motion into linear motion, avoiding the use of screw mechanisms and thus minimizing wear from high-pressure gas, and allows for precise control of valve opening using an electric motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a screw mechanism is used to convert rotational motion into linear motion to reciprocate the valve body, then the valve opening can be adjusted, but the high-pressure gas acts on the threads causing wear and durability problems
Solution Approach 1:
The patent replaces the screw mechanism with a cam mechanism. The cam plate converts rotational motion into linear motion through its cam surface profile, eliminating the threaded engagement that was susceptible to wear from high-pressure gas. This substitution maintains the ability to adjust valve opening while improving durability.
Solution Approach 2:
The invention extracts and removes the screw mechanism from the system entirely. By eliminating the threaded portion that was in direct contact with high-pressure gas, the patent prevents wear at the source while maintaining the essential function of converting rotational actuator motion into linear valve stem movement.
2Force
If a large actuator or air valve is used to reciprocate the valve body against high-pressure gas, then sufficient driving force is provided, but the device becomes large and requires complex control systems
Solution Approach 1:
The cam plate utilizes a curved cam surface profile that provides mechanical advantage throughout the rotation cycle. The varying radius of curvature on the cam surface allows for efficient force transmission, enabling a compact actuator to generate sufficient force to reciprocate the valve body against high-pressure gas without requiring oversized components.
Solution Approach 2:
The cam mechanism provides dynamic force multiplication through its geometric profile. As the cam plate rotates, the cam surface profile dynamically adjusts the leverage and force application to the follower, allowing a smaller actuator to achieve the necessary driving force that would otherwise require a much larger direct-acting actuator.
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 enhances the durability of the flow rate regulating valve by eliminating wear on screw threads and allows for accurate control of high-pressure gas flow rates without the need for large actuators or air valves.
Implementation Method 1
a cam plate 11, a cam follower 12 that is pressed against a surface 11A of the cam plate 11 and moves in a direction of the rotation axis of the cam plate 11 as the cam plate 11 rotates
Data Source
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AI summary
[OBJECT] To provide a flow rate regulating valve that handles high-pressure gas as a working fluid, that can withstand and operate under the high load of high-pressure gas, and that is less susceptible to wear. [SOLUTION] A flow rate regulating valve 100 according to the present invention is characterized by including a cam plate 11, 111, a cam follower 12, 112 that is pressed against a surface 11A, 111A of the cam plate 11, 111 and moves in a direction of a rotation axis of the cam plate 11, 111 as the cam plate 11, 111 rotates, and a valve stem 1 that moves in a direction of the rotation axis of the cam plate 11, 111 in associated with movement of the cam follower 12, 112 and varies a flow rate depending on a relative position with respect to a flow path 3.