Eccentric Rotor Cleaning Head for Bearing Stress Reduction
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Solution Overview
Problem
Existing rotor cleaning devices for open-end spinning apparatuses face issues with excessive mechanical stress on bearings due to unbalanced radial loads, leading to frequent maintenance and replacement, and are often complex and expensive to mitigate these stresses.
Innovation Solution
A rotor cleaning device with a cleaning head featuring a scraper or brush made of polymeric materials, eccentrically mounted to reduce radial stress, and a kinematic mechanism that transfers torque to the cleaning head for rotation, allowing effective cleaning without damaging the rotor's bearings, and a movement system for precise alignment and tilting to accommodate various rotor diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a scraper is inserted and rotated in contact with the rotor inner wall to clean the rotor, then the cleaning effectiveness is improved, but the bearings experience excessive asymmetric stress leading to reduced service life and frequent maintenance
Solution Approach 1:
The scraper is mounted eccentrically on the cleaning head rather than concentrically, creating an asymmetric configuration that generates balanced radial forces during rotation. This eccentric mounting allows the scraper to effectively contact and clean the rotor inner wall while the opposing forces balance out, preventing excessive stress on the rotor bearings and extending their service life
2Strength
If diametrically opposed scrapers are used to compensate radial stresses and reduce forces on the rotor, then the bearing stress is reduced, but the device complexity increases due to piston-spring actuators and motor-driven rotation mechanisms
Solution Approach 1:
The invention extracts and eliminates the complex piston-spring actuation system and motor-driven rotation mechanism from the cleaning device. Instead, it uses a simple manually operable cleaning head that rotates freely, achieving bearing stress reduction through eccentric scraper geometry rather than through complex active control systems
Solution Approach 2:
The cleaning head is designed to rotate freely and perform the cleaning action through its own motion without requiring external motors or complex actuation systems. The operator simply inserts and rotates the cleaning head, and the eccentric scraper configuration automatically provides the necessary cleaning action while maintaining balanced forces on the rotor bearings
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 solution effectively cleans the rotor without excessively stressing the bearings, reducing maintenance needs, is simpler and less expensive, and is adaptable to different rotor sizes, ensuring thorough cleaning without damaging internal surfaces.
Implementation Method 1
a scraper (48) and/or a brush (52)... so as to be able to scrape the throat (32) and possibly said inner lateral wall (33)
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
A rotor cleaning device (40) for an open-end type spinning apparatus (4) comprising - a cleaning head (44) for cleaning an open-end rotor (28), said cleaning head (44) comprising a scraper (48) and/or a brush (52), - a drive system (56), comprising a first motor (60) for the rotation of the cleaning head (44) and a kinematic mechanism (64) mechanically connecting the first motor (60) to the cleaning head (44), - a movement system (88) to bring the cleaning head (44) near the open-end rotor (28) to be cleaned. Advantageously, the kinematic mechanism (64) comprises a mechanical connection between the first motor (60) and a support (68) of the cleaning head (44) with respect to a main rotation axis (X-X). The scraper (48) and/or the brush (52) of the cleaning head (44) are rotatably assembled around a secondary axis (Y-Y) on a pin (72) eccentric to said main axis of rotation (X-X).