Loom Shedding Motor Layout Without Gearboxes for High Torque
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Solution Overview
Problem
Existing shedding machines for looms face challenges with high rotational inertia, excessive vibration, high energy consumption, and low efficiency due to the use of electrical actuators with low torque and inefficient gearboxes, which are costly and increase dimension.
Innovation Solution
A shedding machine design featuring a rotary electric motor with a rotor and stator configuration that minimizes inertia by concentrating mass near the axis, using a cylindrical part and rotor shaft, and eliminating mechanical gearboxes, allowing high torque and efficient operation at rated speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a gearbox is added to increase torque, then torque is improved, but device complexity and dimension increase
Solution Approach 1:
The patent replaces the mechanical gearbox system with an electrical control system. The electric motor directly provides the required torque through electromagnetic interaction between the stator and rotor, eliminating the need for mechanical gear transmission. This substitution resolves the contradiction by achieving high torque without adding mechanical complexity and dimensional constraints associated with gearboxes.
2Force
If a gearbox is added to increase torque, then torque is improved, but loss of energy increases
Solution Approach 1:
By replacing the mechanical gearbox with an electric motor system, the patent eliminates energy losses associated with mechanical gear transmission (friction, gear meshing inefficiencies). The electric motor converts electrical energy to mechanical torque with higher efficiency, directly driving the heald frame without intermediate mechanical transmission stages that would dissipate energy.
3Area of stationary object
If motor size is reduced to fit available space, then area is improved, but torque decreases
Solution Approach 1:
The patent optimizes the motor's physical parameters, specifically the ratio between the outer stator diameter and the rotor cylindrical part length (between 2.0 and 4.0). This parameter optimization allows the motor to achieve high torque output within a compact form factor, resolving the contradiction between small area and high torque by finding the optimal dimensional ratio.
4Speed
If rotational inertia is minimized for high-speed operation, then speed is improved, but torque capacity is reduced
Solution Approach 1:
The patent achieves the dual goal of high speed and high torque by optimizing the motor's geometric parameters, specifically maintaining an outer stator diameter to rotor length ratio between 2.0 and 4.0. This parameter optimization allows the motor to deliver high torque at reduced speeds while maintaining compact dimensions and appropriate rotational inertia for the application.
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 design achieves reduced inertia, higher torque, and improved efficiency without increasing dimensions or cost, enabling precise control of heald frames for weaving.
Implementation Method 1
a rotor, arranged in the stator and comprising a cylindrical part, centered on the main axis and comprising an outer peripheral wall... permanent magnets arranged on the outer peripheral wall of the cylindrical part and being distributed about the main axis... winding laminations, surrounding the main axis and extending radially between an outer stator diameter and an inner stator diameter centered on the main axis, the winding laminations forming winding teeth distributed about the main axis
Implementation Method 2
electrical windings, each electrical winding being wound about several of the winding teeth and received in the stator slots... permanent magnets arranged on the outer peripheral wall of the cylindrical part... each permanent magnet comprising a respective outer surface, the outer surfaces facing the winding teeth
Data Source
AI summary
A fluidic connection device, including a flange, and a nozzle through which passes a distal internal channel, and which is configured so as to be fluidically coupled to a complementary connection device. The nozzle, mounted in the flange with the possibility of tilting relative to the flange, includes a rear end, and a front end. The invention also includes a rod including an intermediate internal channel; a front end, mounted in sealed cooperation with the rear end of the nozzle with the possibility of tilting of the rod relative to the nozzle and relative to the flange, for fluidic communication between the distal internal channel of the nozzle and the intermediate internal channel of the rod; and a rear end for fluidic communication between a proximal internal conduit and the intermediate internal channel.