Plate-Spring Flow Switching Valve for Friction-Free Response
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Solution Overview
Problem
Conventional flow path switching valves experience reduced responsiveness due to frictional forces generated when the spool and sleeve rub against each other during fluid flow path switching.
Innovation Solution
A flow path switching valve configuration that includes a valve body supported by plate springs, allowing for non-contact reciprocation by an actuator, which reduces friction and enhances responsiveness by utilizing elastic force from the plate springs for movement control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spool and sleeve configuration is used for flow path switching, then the valve can achieve flow path switching function, but frictional force is generated between the spool and sleeve which reduces responsiveness
Solution Approach 1:
The patent replaces the traditional mechanical sliding contact system (spool and sleeve) with a magnetic field-based actuation system. The actuator generates a magnetic field that acts on the valve body containing magnetic particles, enabling flow path switching without physical contact between moving parts, thereby eliminating frictional forces and improving responsiveness.
Solution Approach 2:
The patent utilizes the magnetic properties of the valve body (treating magnetism as a field analogous to pneumatic/hydraulic systems) where magnetic field lines pass through the valve body to generate actuating force. This field-based approach replaces mechanical contact with non-contact force transmission, resolving the friction-responsiveness contradiction.
2Reliability
If the spool reciprocates against the sleeve for flow path switching, then flow control is achieved, but wear occurs due to continuous frictional contact
Solution Approach 1:
The patent eliminates mechanical wear by substituting the contact-based spool-sleeve reciprocation with a non-contact magnetic field actuation system. The valve body with magnetic particles responds to magnetic field changes without physical friction, dramatically extending the service life of the valve components.
3Device complexity
If frictional force is present during valve operation, then mechanical drive is simple, but the friction reduces the efficiency and responsiveness of flow path switching
Solution Approach 1:
The patent replaces the simple mechanical drive with a magnetic field-based actuation system that acts on magnetic particles within the valve body. This substitution eliminates frictional losses and improves flow path switching efficiency, with the added benefit of wear-free operation and extended component life.
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
The solution prevents frictional forces during valve operation, improving responsiveness and allowing for precise control of the fluid flow path switching without wear, thereby increasing the valve's efficiency and longevity.
Implementation Method 1
The plate springs apply elastic force to the valve body in accordance with an amount of movement of the valve body in the predetermined direction
Data Source
AI summary
A flow path switching valve includes (a) a valve body in a shape of a rectangular parallelepiped having a predetermined surface and an opposite surface, the valve body including an open flow passage having an opening on the predetermined surface, (b) a main body including a plurality of ports having a respective opening on a facing surface thereof facing the predetermined surface, and a plurality of connection flow passages each connected to respective one of the plurality of ports, (c) a pair of plate springs attached to opposite ends of the valve body to support the valve body with a predetermined gap formed between the predetermined surface and the facing surface, the plate springs applying elastic force to the valve body in accordance with an amount of movement of the valve body in a predetermined direction, and (d) an actuator for reciprocating the valve body in the predetermined direction.