Weaving Machine Drive Shaft Torque Smoothing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Weaving machine driving devices face high energy consumption due to varying drive torque requirements with angular position, which is not efficiently addressed by existing technologies.
Innovation Solution
A driving device with a passive assisting device using permanent magnets, providing an assisting drive torque that reduces the variation in drive torque required from the actuator, thereby minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a passive assisting device with permanent magnets is added to provide assisting drive torque, then energy consumption is reduced, but device complexity increases
Solution Approach 1:
The permanent magnets in the assisting device generate magnetic fields that automatically interact with each other to produce assisting drive torque without requiring external energy supply or control systems. The device serves itself by utilizing the inherent magnetic properties of the permanent magnets to reduce the actuator's energy consumption during drive shaft rotation.
Solution Approach 2:
The patent replaces an active mechanical assistance system (which would require energy supply and control) with a passive magnetic field-based system. The magnetic interaction between permanent magnets substitutes for mechanical force transmission, providing assisting torque without the need for additional actuators or energy-consuming mechanisms.
2Power
If the first magnet arrangement and second magnet arrangement are displaced relative to each other during drive shaft rotation, then assisting drive torque is generated, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric arrangement of magnetic poles in the first and second magnet arrangements. By positioning magnetic poles at specific asymmetric angles relative to the drive shaft rotation, the design ensures that magnetic attraction and repulsion forces generate assisting torque during rotation. This asymmetric configuration is optimized to provide consistent assistance while accommodating reasonable manufacturing tolerances.
Solution Approach 2:
The magnetic pole arrangements are designed with specific local configurations where alternating magnetic poles are positioned at predetermined angular intervals. This local quality optimization ensures that at any given angular position during rotation, the magnetic interaction produces the desired assisting torque while maintaining robustness against manufacturing variations in the overall assembly.
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 passive magnetic assisting device reduces energy consumption by providing a consistent assisting torque, smoothing angular speed variations and optimizing energy use across the drive shaft's rotation.
Implementation Method 1
an attractive and/or repulsive force between the first magnet arrangement and the second magnet arrangement exerts an assisting drive torque on the drive shaft
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Driving device comprising a drive shaft (5) with a drive axis (7), at least one actuator (31) exerting a drive torque on the drive shaft (5), wherein a required drive torque varies with an angular position of the drive shaft (5), and an assisting device (33) with a first magnet arrangement (35) and a second magnet arrangement (37), wherein the first magnet arrangement (35) and the second magnet arrangement (37) are displaced relative to one another with the rotation of the drive shaft (5), wherein the drive torque of the at least one actuator (31) and the assisting drive torque of the assisting device (33) provide a resulting drive torque on the drive shaft (5), wherein the assisting device (33) is a passive assisting device, and wherein the first magnet arrangement (35) comprises at least one first permanent magnet (135,136) and the second magnet arrangement (37) comprises at least one second permanent magnet (137,138). Assembly group of a weaving machine comprising such a driving device, weaving machine comprising such a driving device and method for driving a drive shaft (5) in a weaving machine comprising such a driving device.