Jar Emptying via Neck Vibration Resonance
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Solution Overview
Problem
Existing methods for emptying jars containing sticky powders, such as chamotte, are inefficient due to the powders' tendency to adhere to the jar's walls and conical shape, leading to incomplete discharge even with strong shocks or manual blows.
Innovation Solution
A device and method utilizing vibration generators positioned at the neck of the jar, which apply vibrations over a wide range of frequencies to excite natural resonance modes, facilitating the flow of powder by applying energy at the point of contact rather than the bottom where the powder adheres.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If strong shocks or manual blows are applied to the jar surface, then the powder discharge is improved, but the jar structure is damaged and the emptying is still incomplete
Solution Approach 1:
The patent applies mechanical vibrations at the natural resonance frequency of the jar to achieve effective powder discharge. The vibration generator creates resonant vibrations that propagate through the jar walls, causing the powder to detach and flow out completely without requiring strong external shocks that would damage the jar structure.
Solution Approach 2:
The patent changes the parameter of energy application from high-intensity localized shocks to low-intensity continuous vibrations at resonant frequency. This parameter change allows the energy to be distributed throughout the jar structure, effectively dislodging powder from all surfaces including the conical upper body and blowing shaft, without causing structural damage.
2Ease of operation
If shocks are applied at the neck area, then energy application is simplified, but the powder at the bottom where it adheres strongly is not effectively dislodged
Solution Approach 1:
By applying vibrations at the neck area at the jar's natural resonance frequency, the vibrations are amplified and distributed throughout the entire jar structure. This causes the powder to detach from all surfaces including the bottom and conical upper body, achieving complete discharge while maintaining simple operation with the vibration generator positioned at the neck.
3Temperature
If the jar has strong conicity and internal heat evacuation structures, then heat management is improved, but powder adhesion to walls increases
Solution Approach 1:
The vibration generator creates resonant vibrations that cause the powder to detach from the jar walls, including the conical upper body and internal heat evacuation structures. The vibrations overcome the adhesion forces created by the smooth walls and heat evacuation features, enabling complete powder discharge while preserving the jar's heat management functionality.
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 vibration-based approach effectively dislodges the powder from the jar's interior, achieving better emptying efficiency compared to shock-based methods by targeting the neck area and exciting multiple natural modes, ensuring complete discharge.
Implementation Method 1
A device and method utilizing vibration generators positioned at the neck of the jar, which apply vibrations over a wide range of frequencies to excite natural resonance modes
Implementation Method 2
apply vibrations over a wide range of frequencies to excite natural resonance modes, facilitating the flow of powder
Data Source
Figure 1
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Figure 4
AI summary
According to the invention, a mandrel (11), provided with tabs (20, 21) for holding jars (1) containing powders and for turning the jars upside down in order to empty them through the neck (4), is equipped with vibration generators (31) for exciting the walls of the jar in order to shake off the powder masses adhering thereto. The method is much more efficient than even more energetic shock applications, and frequency scanning can further be advantageously applied. One application relates to an emptying step in methods for the production of nuclear fuel pellets by powder agglomeration.