Spinning Rotor Support Collar for High-Speed Operation
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Solution Overview
Problem
Spinning rotors in open-end spinning devices face material stress limitations at high speeds due to centrifugal forces, restricting operational speeds to around 150,000 rpm, and existing weight-optimized designs do not adequately address these issues for reliable high-speed operation.
Innovation Solution
The rotor cup features a support collar with a thin-walled annular section and a rotationally symmetrical, triangular cross-sectional design, integrated into the rotor base, reducing material stress and moment of inertia, allowing for safe operation beyond 150,000 rpm without significant weight increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rotor cup wall thickness is increased to withstand centrifugal forces at high speeds, then the strength increases, but the moment of inertia increases leading to higher energy consumption and reduced acceleration capability
Solution Approach 1:
The rotor cup employs varying wall thickness with different functional requirements: thinner walls (0.5-1.5mm) in the fiber receiving area where strength requirements are lower, and thicker walls in the fiber sliding area where structural integrity is critical. This local differentiation optimizes the strength-to-weight ratio, reducing moment of inertia and energy consumption while maintaining necessary strength at high speeds
Solution Approach 2:
The invention uses composite material construction with the rotor cup made from high-strength materials allowing thin-walled design, and the support collar made from rigid materials providing structural reinforcement. This composite approach enables the rotor to withstand centrifugal forces at speeds exceeding 150,000 rpm while keeping overall mass low for energy efficiency
2Use of energy by moving object
If the rotor cup wall thickness is decreased to reduce moment of inertia and energy consumption, then the energy efficiency improves, but the rotor cup cannot withstand centrifugal forces at high speeds
Solution Approach 1:
The rotor cup employs varying wall thickness with different functional requirements: thinner walls (0.5-1.5mm) in the fiber receiving area where strength requirements are lower, and thicker walls in the fiber sliding area where structural integrity is critical. This local differentiation optimizes the strength-to-weight ratio, reducing moment of inertia and energy consumption while maintaining necessary strength at high speeds
Solution Approach 2:
The rotor cup is segmented into distinct functional zones with different wall thicknesses: a fiber receiving area with thinner walls for weight optimization, and a fiber sliding area with thicker walls for structural strength. This segmentation allows each zone to be optimized independently for its specific function, achieving both low energy consumption and sufficient strength
3Speed
If the rotor design is optimized for weight reduction to improve acceleration behavior, then the acceleration capability improves, but the structural integrity becomes insufficient at very high speeds
Solution Approach 1:
The rotor cup is segmented into distinct functional zones with different wall thicknesses: a fiber receiving area with thinner walls for weight optimization, and a fiber sliding area with thicker walls for structural strength. This segmentation allows each zone to be optimized independently for its specific function, achieving both low energy consumption and sufficient strength
Solution Approach 2:
The support collar is designed with a triangular cross-section and integrated into the rotor base before operation, providing pre-established structural reinforcement in the critical fiber sliding area. This preliminary structural preparation ensures the rotor can withstand the extreme centrifugal forces encountered during high-speed operation without compromising structural integrity
4Ease of manufacture
If the rotor cup is designed with uniform wall thickness for manufacturing simplicity, then the manufacturing ease improves, but the material stress distribution becomes inefficient at high speeds
Solution Approach 1:
The rotor cup employs varying wall thickness with different functional requirements: thinner walls (0.5-1.5mm) in the fiber receiving area where strength requirements are lower, and thicker walls in the fiber sliding area where structural integrity is critical. This local differentiation optimizes the strength-to-weight ratio, reducing moment of inertia and energy consumption while maintaining necessary strength at high speeds
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 design enables spinning rotors to operate reliably at speeds exceeding 150,000 rpm with reduced material stress and minimal energy consumption, ensuring operational reliability and cost efficiency.
Implementation Method 1
at very high speeds of rotation of the spinning rotors, the centrifugal forces that occur in the area of the rotor cups often result in large material stresses
Implementation Method 2
the centrifugal forces that occur in the area of the rotor cups often result in large material stresses
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a spinning rotor (3) for an open-end spinning device (1), particularly one operating at high rotor speeds, comprising a rotor cup (26) which has a rotor base (6) and an opening (30) and an annular wall section (31) designed as a fiber sliding wall. According to the invention, the rotor cup (26) has a support collar (9) in the transition area between the rotor base (6) and the annular wall section (31), the collar extending away from the opening (30) of the rotor cup (26).