Fulcrum Guide Speed Limiting in Spinning Take-Up
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Solution Overview
Problem
The fulcrum guide in conventional spinning take-up devices is prone to early damage due to excessive rotation speed during the acceleration period, leading to severe wear and bearing issues.
Innovation Solution
A spinning take-up device with a fulcrum guide that is rotatable and equipped with a rotational resistance applying means, adjusting its maximum rotation speed to 12000 rpm or less during the acceleration period, and incorporating a ceramic fulcrum guide with PEEK-based resin interposed members to reduce wear and friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fulcrum guide is allowed to rotate freely during the acceleration period, then the rotation speed of the fulcrum guide becomes excessively high, but this causes severe wear and early damage to the fulcrum guide and bearing
Solution Approach 1:
The patent applies parameter changes by introducing rotational resistance to modify the rotation speed parameter of the fulcrum guide during the acceleration period. Specifically, the rotational resistance is designed to limit the maximum rotation speed to 14,400 rpm or less, preventing the excessively high speeds that cause severe wear and bearing damage while still allowing sufficient rotation to reduce local abrasion.
Solution Approach 2:
The patent implements dynamics by making the rotational characteristics of the fulcrum guide adjustable and condition-dependent. The rotational resistance is applied specifically during the acceleration period when yarn feeding roller speed changes, rather than being fixed throughout operation. This dynamic control allows the system to adapt to different operational phases, permitting rotation when beneficial for wear distribution while preventing excessive speeds during critical acceleration phases.
2Object-affected harmful factors
If the fulcrum guide rotates at high speed during acceleration, then local abrasion of the outer peripheral surface is reduced, but the bearing load becomes excessively large causing early breakage
Solution Approach 1:
The patent uses parameter changes to control the rotational speed parameter within a specific range during acceleration. By limiting the maximum rotation speed to 14,400 rpm or less through rotational resistance, the system maintains enough rotation to distribute yarn contact and reduce local abrasion, while simultaneously keeping the torque and bearing load within acceptable limits to prevent early breakage.
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
Effectively suppresses early breakage of the fulcrum guide and its bearing components by controlling rotation speed and applying rotational resistance, thereby extending the device's lifespan and maintaining yarn quality.
Implementation Method 1
the guide body is provided with a rotational resistance applying means configured to apply rotational resistance to the fulcrum guide such that the maximum rotation speed of the fulcrum guide in the acceleration period is less than 14400 rpm
Implementation Method 2
incorporating a ceramic fulcrum guide with PEEK-based resin interposed members to reduce wear and friction
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
A spinning take-up device 1 includes a guide body 16 having a fulcrum guide 31, and a controller 60. The controller 60 switches a rotation speed of godet rollers 3 and 4 between a first yarn winding speed and a first yarn threading speed. The controller 60 switches a rotation speed of a bobbin holder 13 between a second yarn winding speed and a second yarn threading speed. The fulcrum guide 31 has a cylindrical shape and is rotatable around the central axis. In the spinning take-up device 1, a maximum rotation speed of the fulcrum guide 31 in an acceleration period is larger than a maximum rotation speed of the fulcrum guide 31 in a constant speed period. The guide body 16 is provided with a rotational resistance applying means 37 that applies rotational resistance to the fulcrum guide 31 so that the rotation speed of the fulcrum guide 31 in the acceleration period is less than 14400 rpm.