Single Shaft Screen with Adjustable Non-Circular Acceleration

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing three-shaft vibrating screens face challenges in inclining operations due to gear lubrication issues and are larger and heavier than single-shaft screens, limiting the adjustment of material propagation rate without altering inclination or rotation speed.

Innovation Solution

A single-shaft vibrating screen with adjustable acceleration, utilizing a single shaft to drive vibration-inducing weights on either side, allowing for variable screening operations without changing the screen's angle or rotation rate, using mechanisms like internal/external gear arrangements or cog belts to control the elliptical stroke and propagate material efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a three-shaft vibrating screen is used to increase material propagation rate by inclining the screen, then the propagation rate improves, but the gear lubrication becomes problematic and the device becomes larger and heavier

Engineering Contradiction:

Improvematerial propagation rateVSAvoidgear lubrication complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the traditional three-shaft system into a single-shaft system with separate vibration induction mechanisms on each side of the screen, simplifying the overall structure and eliminating the complex longitudinal triple gear-gear box while maintaining screening functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of inclining the entire screen to increase propagation rate, the patent inverts the approach by keeping the screen horizontal and using adjustable acceleration characteristics of the vibration weights to control material propagation, thereby avoiding gear lubrication issues associated with inclination

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If a three-shaft vibrating screen is used, then screening capability is provided, but the device becomes larger and heavier

Engineering Contradiction:

Improvescreening capabilityVSAvoiddevice weight

Core Design Contradiction:

ProductivityVSWeight of stationary object

Solution Approach 1:

The patent merges the functions of three separate shafts into a single shaft system where one shaft drives vibration-inducing weights on both sides of the screen, reducing the number of components and overall device weight while maintaining screening capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single shaft serves multiple functions by driving vibration weights on both sides of the screen simultaneously, replacing the need for three separate shafts and reducing device weight and material usage

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If the screen inclination angle is changed to adjust material propagation rate, then propagation rate is adjusted, but the gear lubrication becomes problematic

Engineering Contradiction:

Improvematerial propagation rateVSAvoidgear lubrication reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent introduces dynamic adjustability of the vibration weights' acceleration characteristics, allowing the system to adapt material propagation rate through variable acceleration rather than static inclination changes, maintaining gear lubrication reliability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the control parameter from screen inclination angle to acceleration characteristic of vibration weights, enabling propagation rate adjustment without altering the screen's physical orientation and thus avoiding gear lubrication problems

Inventive Principle:

Principle #35Parameter changes

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

Enables easy internal adjustability of material propagation rate, reducing weight and material usage while maintaining efficient screening operations across various inclinations, providing a cost-effective and flexible solution for material processing.

Implementation Method 1

a single shaft extends across the screen to drive the rotation of vibration inducing weights located on each side of the screen

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

utilizing a single shaft to drive vibration-inducing weights on either side, allowing for variable screening operations without changing the screen's angle or rotation rate, using mechanisms like internal/external gear arrangements or cog belts

Methodology Applied

Scientific EffectGear mechanism: Gear

Data Source

PatentUS20180056330A1Non-circular acceleration mechanism for a single shaft screen

Publication Date: 2018.03.01 TEREX USA LLC

AI summary

A single shaft material processing vibrating screen is described which provides for non-circular acceleration (elliptical and otherwise). The system includes a main eccentric is rotated a first direction and a secondary eccentric orbits the main eccentric in an opposite direction.The orbiting is accomplished by either long and short arms or by eccentric flywheels. The size and shape of elliptical/non-circular motion is adjustable by varying mass of main and secondary eccentrics, length of long and short arms or the size of eccentric flywheels.