Discharge Closure Member Biasing for Low-Density Material Flow
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Solution Overview
Problem
Conventional discharge assemblies for silos struggle to reliably initiate movement of pivotally connected arms when dispensing pulverulent materials of low density, as the forces imparted by the material are insufficient to move the arms between open and closed positions.
Innovation Solution
Incorporating a resilient biasing member, such as a spring, to provide sufficient force to move the closure member from a closed to an open position, ensuring reliable initial opening and allowing the closure member to be moved to a closed position when required, even with low-density materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pivotally connected arms are used to direct flowable material, then the structure can control material flow through opening and closing positions, but the arms cannot reliably initiate movement when dispensing low-density pulverulent materials because the forces imparted by the material are insufficient
Solution Approach 1:
The resilient biasing member is pre-loaded to store elastic energy that is released to provide the initial force needed to move the closure member from the closed to open position, before the material flow can exert its own force. This preliminary action overcomes the insufficient force problem with low-density materials.
Solution Approach 2:
The resilient biasing member acts as an intermediary between the closure member and the material flow, providing an additional force mechanism that supplements the insufficient force from low-density materials. The spring serves as a mediator that transfers stored mechanical energy to assist arm movement initiation.
2Reliability
If the closure member is moved solely by forces from material flow, then the structure remains simple without additional components, but the operation becomes unreliable with low-density materials
Solution Approach 1:
The resilient biasing member is designed to automatically engage and disengage based on the position of the closure member. As the arm rotates from closed to open, the biasing member naturally provides force when needed and then disengages, requiring no external control system or additional complexity beyond the spring mechanism itself.
Solution Approach 2:
The resilient biasing member changes the force parameter available to the closure member by introducing a supplemental force component. The spring's elastic force parameter varies with compression, providing maximum assistance during the critical initial movement phase when material force is insufficient.
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 resilient biasing member ensures consistent and reliable operation of the discharge assembly, particularly for low-density materials, by providing the necessary force to initiate the opening of the closure member, enhancing the dispensing process without disrupting material flow.
Implementation Method 1
a resilient biasing member is provided on or associated with the closure member to bias the closure member to the open position in use
Data Source
AI summary
A discharge assembly for use in or with dispensing apparatus. The discharge assembly includes an entry chamber for receiving one or more items to be dispensed in use. At least one discharge outlet is provided in the entry chamber. The directing member is movably mounted in the entry chamber for directing the one or more items through the at least one discharge outlet in use. At least one opening is defined in or associated with the directing member for allowing the one or more items to move through the at least one opening and towards the discharge outlet in use. A closure member is associated with the at least one opening of the directing member and said closure member is arranged to move in use between an open position, wherein the one or more items can move through the at least one opening of the directing member, and a closed position, wherein the one or more items are prevented from moving through the at least one opening of the directing member. A resilient biasing member is provided on or associated with the closure member to bias the closure member to the open position in use.