Control Valve Holder Vibration Isolation
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Solution Overview
Problem
Existing control valves in cooling systems for engines face issues with maintaining sealing properties and achieving desired flow rate characteristics due to vibration-induced misalignment of the slide ring and sealing ring during welding, leading to insufficient sealing and flow rate performance.
Innovation Solution
A control valve design that includes a holder separated from the joint and outflow port, which prevents vibration transmission to the slide ring and sealing ring, ensuring proper alignment and assembly, along with a slide ring with a large diameter portion to manage fluid pressure and a biasing member to maintain stable sealing, and a burr accommodation portion to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If vibration welding is performed to join the joint to the outflow port, then the joint is securely connected, but the slide ring and sealing ring become misaligned due to transmitted vibration
Solution Approach 1:
A holder is introduced as an intermediary component between the joint and the slide ring. The holder is joined to the joint via vibration welding, but is positioned such that it does not transmit vibration to the slide ring and sealing ring. This intermediary structure allows the joint to be securely connected while protecting the precision components from vibration-induced misalignment.
2Strength
If the holder is joined to the outflow port, then the holder is securely positioned, but vibration is transmitted to the slide ring causing misalignment
Solution Approach 1:
The holder serves as a mediator that is securely positioned through joining to the joint, but is strategically designed to stop vibration transmission before it reaches the slide ring and sealing ring. The holder's position and structure create a vibration isolation zone that protects the precision sealing components.
3Device complexity
If the slide ring is retained on the joint side surface, then the assembly is simplified, but sealing properties deteriorate due to vibration-induced inclination
Solution Approach 1:
The holder is positioned between the joint and the slide ring, acting as a vibration-blocking intermediary. This allows the slide ring to be retained on the joint side surface for simplified assembly, while the holder prevents vibration from reaching the slide ring, thereby maintaining reliable sealing properties without increasing device complexity.
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 ensures reliable sealing properties and desired flow rate characteristics by preventing vibration-induced misalignment and maintaining stable sealing over time, while also reducing the risk of contamination from burrs.
Implementation Method 1
a biasing member that biases the slide ring toward the rotor
Implementation Method 2
The above-described joint is joined to the outflow port by performing, for example, vibration welding
Data Source
AI summary
A control valve includes a casing that has a port in which an outflow opening is formed, a joint that is joined to an opening end surface of an outflow opening in the port, a rotor that is rotatably accommodated inside the casing, a slide ring that has a slide surface for sliding on an outer circumferential surface of the rotor, a sealing ring that is interposed between an inner circumferential surface of the port and an outer circumferential surface of the slide ring, and a holder that is disposed between the inner circumferential surface of the port and the outer circumferential surface of the slide ring and holds the sealing ring from an outer side in a port axial direction with respect to the sealing ring. The holder is disposed to be separated from at least any of the joint and the port.