Control Valve Equalized Pressure Areas Solenoid Actuation
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Solution Overview
Problem
Existing control valves face issues with unbalanced fluid pressure leading to ineffective control and increased sliding resistance, resulting in delayed response and hysteresis phenomena, especially under high-pressure conditions, which complicates the capacity control of fluids.
Innovation Solution
A control valve design featuring equalized pressure receiving areas for the spring devices and valve surfaces, combined with a solenoid-actuated mechanism, eliminates unbalanced forces and sliding resistance by ensuring equal pressure distribution across the valve surfaces, allowing for precise control without frictional issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve body is made to slide against the valve bore surface for operation, then the valve can be actuated by spring force and solenoid, but sliding resistance increases causing delayed response and hysteresis
Solution Approach 1:
The patent replaces the sliding mechanical contact system with a magnetic field-based actuation system. The solenoid generates a magnetic field that directly acts on the valve body without requiring sliding contact, eliminating sliding resistance and its associated hysteresis and response delays.
Solution Approach 2:
The patent uses fluid pressure differential to drive the valve body movement. By creating unequal pressure receiving areas on opposite sides of the valve body, the fluid pressure itself provides the actuating force, replacing the need for sliding mechanical actuation and eliminating sliding friction.
2Ease of operation
If guiding components are added to reduce sliding resistance, then the valve operation becomes smoother, but the device complexity increases and production costs rise
Solution Approach 1:
The patent eliminates the need for guiding components by replacing the sliding mechanical system with magnetic field actuation. The solenoid's magnetic field provides contactless actuation, and the valve body moves freely within the valve bore without requiring mechanical guides, thereby reducing device complexity.
Solution Approach 2:
The patent removes guiding components from the valve structure entirely. By using magnetic field actuation and fluid pressure differential, the valve can operate without mechanical guidance, simplifying the overall device structure and reducing production costs.
3Ease of operation
If the pressure receiving areas of spring devices and valve surfaces are made unequal, then the valve can be actuated, but unbalanced fluid pressure causes ineffective control
Solution Approach 1:
The patent deliberately creates an unequal pressure receiving area configuration as a functional parameter. The first pressure receiving area (on the valve body) is made larger than the second pressure receiving area (on the valve seat), and this specific parameter relationship enables effective capacity control by creating the necessary pressure differential for valve actuation while maintaining precise control.
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 response performance and durability of the control valve by reducing sliding resistance and hysteresis, enabling accurate capacity control of fluids under varying pressures without the need for guiding components, thus improving operational reliability and reducing production costs.
Implementation Method 1
a solenoid 150... Both ends of the solenoid rod 151 are slidably introduced by a first bearing 154A and a second bearing 154B. Then, the solenoid rod 151 is operated according to the magnitude of electrical current flowing in the solenoid 150 to open or close the second valve seating surface 125A of the second valve body 125 with regard to the second valve surface 120B.
Implementation Method 2
the first valve body 120 is elastically pressed toward a second valve body 125 by a first spring 140A arranged in the first pressure chamber 108. Also, the first valve body 120 is provided with the first valve surface 120A at the intermediate part as well as the second valve surface 120B at the apical end. Also, a second spring 140B is arranged between the first valve body 120 and second valve body 125, and the first valve body 120 and the second valve body 125 are elastically pressed by the second spring 140B in opposing directions.
Data Source
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AI summary
The present invention relates to a control valve capable of performing capacity control independent of the pressure of operation fluid and according to preset conditions. The control valve opens and closes a first poppet valve and a second poppet valve by a solenoid section where a solenoid rod is moved according to the magnitude of an electric current. In the control device, the following pressure-receiving areas are set to be substantially equal to each other: the first effective pressure-receiving area of a first pressure-sensing spring device, the second effective pressure-receiving area of a second pressure-sensing spring device, the first pressure-receiving area on the inner side of a portion where a first valve seat surface and a first valve section surface are in contact with each other, and the second pressure-receiving area on the inner side of a portion where a second valve seat surface and a second valve section surface are in contact with each other, in which the first pressure-sensing spring device, the second pressure-sensing spring device, the first valve seat surface, the first valve section surface, the second valve seat surface, and the second valve section surface are forming the first poppet valve and the second poppet valve.