Valve Core Assembly Radial Floating Design for Sealing
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Solution Overview
Problem
Existing compressed gas bypass valves in turbocharged engines face issues with gas leakage and valve head wear due to dimensional tolerances and axial clearance, leading to poor sealing and increased processing costs.
Innovation Solution
A valve core assembly with a floatable valve head design, featuring a guide rod connected to a ball bearing and a fixing block, which allows radial floating movement to enhance sealing and reduce axial gaps, combined with an armature, sleeve, coil, stators, and elastic components to improve connection strength and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve head is connected directly to the armature in a floating manner, then the valve head can move freely to achieve opening and closing, but the processing requirements for the armature shape increase and processing costs increase
Solution Approach 1:
The patent introduces a guide rod as an intermediary component between the armature and the valve head. The guide rod features a radial floating gap that allows the valve head to move freely while the armature remains simple in shape. This mediator transfers the motion from the armature to the valve head without requiring complex armature geometry, thus resolving the contradiction between ease of operation and ease of manufacture.
2Force
If the guide rod is connected to the valve head by interference fit, then the guiding force can be transferred, but dimensional tolerances cause poor sealing between the valve head and valve seat
Solution Approach 1:
The guide rod acts as a mediator that decouples the force transfer function from the sealing function. The interference fit between the guide rod and valve head ensures reliable force transfer, while the radial floating gap allows the valve head to self-adjust its position relative to the valve seat, compensating for dimensional tolerances and ensuring reliable sealing.
Solution Approach 2:
The radial floating gap introduces dynamic adjustment capability to the valve head position. This allows the valve head to move radially to achieve optimal sealing contact with the valve seat, compensating for manufacturing tolerances and ensuring reliable sealing performance while maintaining effective force transfer through the guide rod.
3Length of moving object
If there is a gap between the valve head and guide rod in the axial direction, then the valve head can move axially, but the valve head tends to wear
Solution Approach 1:
The patent applies dynamics by allowing radial movement through the floating gap while maintaining axial constraint. The valve head can move radially to accommodate position variations but is constrained axially by the guide rod structure, preventing excessive wear while maintaining the necessary movement capability for valve operation.
Solution Approach 2:
The guide rod structure provides different degrees of freedom in different directions: radial floating gap allows movement in the radial direction while axial constraint prevents wear through minimal axial clearance. This local differentiation of movement constraints resolves the contradiction between axial movement range and service life.
4Ease of manufacture
If dimensional tolerances of the valve seat and valve head are not controlled tightly, then manufacturing costs decrease, but the attachment and sealing between the valve head and valve seat cannot be fully guaranteed
Solution Approach 1:
The radial floating gap provides dynamic adjustment capability that allows the valve head to self-align with the valve seat within certain tolerance ranges. This dynamic compensation mechanism enables reliable sealing without requiring tight dimensional tolerances, thus reducing manufacturing costs while maintaining sealing reliability.
Solution Approach 2:
The floating gap structure provides a built-in compensation mechanism that anticipates and accommodates dimensional variations. By designing the guide rod with a radial floating gap, the system beforehand cushions against the effects of dimensional tolerances, ensuring reliable sealing without requiring expensive tight tolerance 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
The solution achieves better gas tightness, reduces valve head wear, and enhances the connection strength between components, resulting in improved sealing performance and reduced processing costs.
Implementation Method 1
a guide rod (1), a ball bearing (2), a valve head (3) and a fixing block (4)
Implementation Method 2
an elastic component (20) for biasing the valve head (3)
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Valve core assembly and compressed gas bypass valve The present device relates to a valve core assembly comprising: a guide rod (1); a ball bearing (2); a valve head (3) provided with a first through hole (301) at the bottom; and a fixing block (4) provided with a second through hole (401) at the bottom. A first end portion (101) of said guide rod (1) is inserted into said ball bearing (2), the first through hole (301) of said valve head (3) and the second through hole (401) of said fixing block (4) in sequence, and the first end portion (101) of said guide rod (1) is fixedly connected to said ball bearing (2) and the second through hole (401) of said fixing block (4) respectively. The structure of the valve core assembly according to the present device has good gas tightness, and can reduce the wear of the valve head.