Valve Insertion Mechanism With Vibration for Guide Centering
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Solution Overview
Problem
Existing methods for inserting valves into valve guides are difficult due to small gaps, leading to wear, deformation, and damage of components, as well as complexity in construction and potential for dimension errors.
Innovation Solution
A method and apparatus that use an upper and lower support system with a vibrating device to gently lower the valve into the guide, allowing the valve to swing and rotate, ensuring centering and insertion without external pressure, using the weight of the valve for alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve sucking device is used to insert the valve into the valve guide, then the valve can be inserted into the valve guide, but the stem seal may be damaged, the valve guide may wear and deform, and the sucking device may wear
Solution Approach 1:
A vibration isolation mechanism is introduced as an intermediary between the valve sucking device and the valve guide. This mechanism includes a vibration isolation member with a cushioning portion that absorbs vibration and impact forces, preventing direct transmission to the stem seal and valve guide, thereby protecting these components from damage and wear while maintaining the valve insertion function
Solution Approach 2:
The vibration isolation mechanism provides beforehand cushioning by pre-absorbing potential impact forces and vibrations before they reach the stem seal and valve guide. The cushioning portion is designed to deform elastically under load, creating a protective buffer that prevents sudden shocks and gradual wear during the valve insertion process
2Productivity
If the valve sucking device is abutted against the stem seal repeatedly, then the valve can be inserted, but the sucking device and stem seal wear by repeated abutment
Solution Approach 1:
The vibration isolation member acts as a mediator that reduces direct contact forces between the sucking device and stem seal during repeated insertion operations. By absorbing and dissipating mechanical energy through elastic deformation, it minimizes wear on both the stem seal and sucking device while maintaining efficient valve insertion throughput
3Manufacturing precision
If the valve is inserted with a small gap between the shaft section and the valve inserting hole, then the valve fits tightly in the guide, but the insertion operation becomes very difficult
Solution Approach 1:
A vibration mechanism is applied to the valve or valve holder during insertion, causing high-frequency oscillations that help the valve navigate the tight clearance between the shaft section and valve inserting hole. The vibration creates temporary separation and reduces friction, enabling smooth insertion while maintaining the required tight fit once inserted
Solution Approach 2:
The physical state of the valve insertion process is changed by introducing vibration, which temporarily alters the effective clearance and friction characteristics. This parameter change allows the valve to be inserted more easily despite the small gap requirement, as the vibrating state reduces contact resistance during the insertion motion
4Ease of operation
If a valve sucking device with a vacuum pump is used, then the valve can be held and inserted, but the apparatus becomes complicated in construction
Solution Approach 1:
The complex vacuum pump system is extracted and replaced with a simpler mechanical holding mechanism. The invention uses a valve holder with clamping or gripping elements that physically secure the valve without requiring vacuum generation, thereby maintaining the valve holding and insertion function while dramatically simplifying the apparatus construction
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 approach simplifies the valve insertion process, reduces wear and deformation, and ensures reliable centering of the valve within the guide, eliminating the need for external pressure sources and minimizing damage to components.
Implementation Method 1
at least the lower support member of the upper and lower support members being vibrated by a vibrating device
Data Source
AI summary
Upper and lower support members, supporting a valve, are lowered toward a valve guide with at least the lower support member vibrated by a vibrating device. When a lower-end chamfered surface of the valve has failed to be brought into contact with the opening edge of the guide through the lowering, not only the upper support member is caused to gradually move away from an umbrella section of the valve but also the position of supporting, by the lower support member, of a shaft section of the valve is displaced downward after the lower end of the shaft section of the valve contacts the upper end surface of the guide, so that vibrating movement of the lower end of the shaft section is reduced to allow the chamfered surface to contact the opening edge. Then, the valve is inserted into the guide by a pressing member.