Vibrating Sieve Control Reducing Motor Capacity via Sequential Shaft Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gearless vibration screen mechanisms experience increased power consumption and motor capacity requirements due to higher starting torque and inefficient load handling, leading to potential starting failures and increased weight, which complicates motor arrangement and further elevates power consumption.
Innovation Solution
A method of controlling the vibration screen operation by presetting a throughput threshold, allowing one rotating shaft to start first and then the other after steady state is achieved, and temporarily stopping drive force transmission to one shaft when throughput is below the threshold, utilizing the pendulum action of eccentric weights to start the shaft, thereby reducing motor capacity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If two motors are installed to drive the two rotating shafts independently in a gearless mechanism, then the starting torque requirement is reduced compared to gear-driven systems, but the motor capacity and power consumption increase due to lower load rates and inefficient motor utilization
Solution Approach 1:
The control device starts one motor before the other motor. By initiating the first motor and allowing it to reach a steady state before starting the second motor, the system avoids the simultaneous high starting current draw that would occur with both motors starting at once, thereby reducing peak power consumption while still achieving the required starting torque through sequential activation
Solution Approach 2:
The control device periodically switches between single-motor operation and dual-motor operation based on load conditions. When the load is light, only one motor operates to reduce power consumption. When the load increases beyond a threshold, the second motor is activated. This periodic switching between operational modes optimizes the balance between torque availability and energy efficiency
2Loss of energy
If two motors are installed to drive the two rotating shafts independently, then the gearless mechanism eliminates energy loss due to gears, but the motors must be arranged on both sides of the vibration screen increasing space requirements and overall weight
Solution Approach 1:
The control device enables one motor to drive both rotating shafts sequentially by stopping the transmission of rotary drive force to one shaft after the other shaft has reached steady state. This merging of functions allows a single motor to perform the work of two motors under certain operating conditions, reducing the total motor capacity required and thereby reducing the overall weight of the vibration generator while maintaining the gearless energy efficiency
3Use of energy by moving object
If the transmission of rotary drive force is stopped to one rotating shaft to reduce power consumption, then energy efficiency improves, but the shaft cannot handle high throughput loads effectively
Solution Approach 1:
The control device dynamically adjusts the operational state of the two rotating shafts based on real-time load conditions. When throughput is low, the system switches to single-shaft operation to reduce power consumption. When throughput exceeds a predetermined threshold, the system automatically activates both shafts to handle the increased load. This dynamic adaptation ensures optimal energy efficiency across varying operational conditions without sacrificing productivity when needed
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 effectively reduces peak motor capacity and power consumption, prevents voltage drops, and ensures reliable starting even with reduced-capacity motors, while optimizing energy use based on load conditions.
Implementation Method 1
utilizing the pendulum action of eccentric weights to start the shaft
Data Source
Figure 1
Figure 2
Figure 3
AI summary
To provide an operation control method capable of securely reducing the required motor capacity and power consumption, a threshold based on the load size is preset, and after the driven/rotated state of two rotating shafts 31a and 31b becomes steady, and if the load size is smaller than the threshold, the conveyance of rotating drive to one of the two rotating shafts 31a and 31b is stopped and the rotating shaft with the conveyance of rotating drive stopped is rotated together interlocked with the other rotating shaft by vibration generated by the rotating drive of the other rotating shaft, and if the load size becomes larger than the threshold, the conveyance of rotating drive to the rotating shaft with the conveyance of rotating drive stopped is started so as to drive/rotate the two rotating shafts 31a and 31b.