Triangular Tensioning Element for Gyratory Sifter Screen Fastening
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Solution Overview
Problem
Gyratory sifters face issues with screen detachment and ineffective filtration due to vibrational movement, limiting their ability to separate solids from liquids in drilling operations, and there is a need for a system to uniformly tension the screen and prevent particle bypass.
Innovation Solution
A screen fastening and sealing mechanism using a triangular tensioning element and air bag system that uniformly tensions the screen along its edges and creates a sealing surface to prevent oversized particle bypass, utilizing a bracket with a sloping portion and retention wall to secure the screen during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screen is mounted in a gyratory sifter for filtration, then solids can be separated from liquids, but vibrational movement causes screen detachment and reduces filtration effectiveness
Solution Approach 1:
The screen support structure is divided into multiple brackets distributed around the periphery of the screen, with each bracket independently supporting a portion of the screen. This segmentation allows the screen to be securely held at multiple points while accommodating vibrational movements without causing overall detachment.
Solution Approach 2:
The invention combines the screening function with the support structure by integrating screen support brackets directly into the sifter assembly. The brackets serve dual purposes: structural support for the screen and vibration damping through their mechanical connection to the sifter frame, merging support and filtration functions into a unified system.
2Stability of the object's composition
If a screen is tensioned to prevent detachment, then screen stability improves, but uniform tension distribution along the screen edge is difficult to achieve
Solution Approach 1:
The screen support brackets are positioned equidistantly around the periphery of the screen, creating equipotential tension distribution. Each bracket applies support force at equivalent positions, ensuring uniform tension across the entire screen edge and preventing localized stress concentrations that would lead to non-uniform tension distribution.
Solution Approach 2:
Each screen support bracket is designed with specific local characteristics including angled support surfaces and positioning features that apply tension forces at optimized locations along the screen edge. This local quality optimization ensures that each bracket contributes uniformly to the overall tension distribution while accommodating local variations in screen material properties.
3Reliability
If the screen is securely fastened to the sifter, then particle bypass is prevented, but the complexity of the fastening system increases
Solution Approach 1:
The screen support brackets are designed to self-adjust and self-tension the screen during operation. The angled support surfaces and positioning features automatically apply appropriate tension forces as the screen is installed and as vibrations occur, eliminating the need for external tensioning mechanisms or complex adjustment systems while ensuring particles are effectively contained.
Solution Approach 2:
The support brackets serve as intermediary elements between the sifter frame and the screen, providing a simplified mechanical interface that achieves secure fastening. Rather than directly attaching the screen to the frame or using complex fastening systems, the brackets mediate the connection, distributing loads and securing the screen with simple, elegant mechanical features.
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 system effectively secures the filtration screen, enhancing its ability to separate solids from liquids by maintaining tension and preventing particle bypass, thereby improving the efficiency of the separation process in drilling operations and other industries.
Implementation Method 1
an air bag positioned within the box and expandable to apply tension to the mesh wire screen
Implementation Method 2
A box vibrates the mesh wire screen to assist in the filtration
Data Source
AI summary
An apparatus, system and method for fastening a screen has a screen with apertures sized to separate a first sized material from a second sized material. A box is positioned beneath the screen in a bracket extending along the screen. A protrusion extends from the box toward the screen. A triangular tensioning element secured along a length of the screen moves in a direction substantially perpendicular to the length of the screen in response to contact with the protrusion to seal the screen against the bracket and tension the screen.