Open-End Spinning Rotor Coupling Device Centrifugal Locking
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Solution Overview
Problem
Existing open-end spinning rotor coupling mechanisms face issues with reliable torque transmission at high rotational speeds and imbalance due to complex, multi-component designs that accumulate manufacturing tolerances, leading to potential damage.
Innovation Solution
A compact coupling device with locking bodies and a resilient element, arranged in a pin configuration, provides a positive shaft-hub connection between the rotor shaft and rotor cup, utilizing centrifugal force for axial locking and eliminating the need for separate axle elements, thus ensuring reliable torque transmission and reduced imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex multi-component coupling mechanism is used for axial locking, then reliable locking at standstill and during rotation is achieved, but manufacturing tolerances accumulate leading to imbalance and potential damage
Solution Approach 1:
The patent combines multiple coupling mechanisms (centrifugal locking, resilient element locking, and positive engagement) into a single integrated coupling device. The locking bodies are arranged in a holding element that is non-releasably connected to the rotor shaft, while the hub is formed as an integral part of the rotor cup. This merging eliminates the need for separate coupling components, preventing tolerance accumulation and imbalance while maintaining reliable locking in both standstill and rotational states.
2Power
If a separate axle element is used for positive connection, then torque transmission is achieved, but device complexity increases with more components
Solution Approach 1:
The holding element is designed to serve dual functions: it holds the locking bodies for axial locking while simultaneously providing the positive connection for torque transmission. The hub is formed as an integral part of the rotor cup with an internal geometry that directly engages with the pin's external geometry. This eliminates the need for separate axle elements or additional coupling components, reducing device complexity while maintaining effective torque transmission.
3Reliability
If locking bodies are arranged in a separate coupling device, then axial locking is achieved, but imbalance occurs due to accumulated manufacturing tolerances
Solution Approach 1:
The holding element is non-releasably connected to the rotor shaft as a single integrated unit, and the hub is formed as an integral part of the rotor cup. This integration eliminates the need for separate coupling devices and multiple assembly steps, thereby preventing the accumulation of manufacturing tolerances that would lead to imbalance. The locking bodies are securely positioned within the holding element, ensuring reliable axial locking without compromising balance precision.
4Reliability
If a resilient element is added to lock at standstill, then locking at rest is achieved, but device complexity increases
Solution Approach 1:
The resilient element is integrated within the coupling device structure rather than being a separate component. It is arranged between the locking bodies and the holding element, utilizing the existing spatial configuration to provide elastic preloading. This approach achieves reliable locking at standstill through the resilient element's elastic deformation while maintaining a compact and relatively simple overall device structure.
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 achieves reliable torque transmission at high speeds and minimizes manufacturing imbalances, resulting in a more stable and efficient spinning rotor operation with fewer components and improved centring of the rotor cup.
Implementation Method 1
locking bodies, which are arranged in a holding element and lock the rotor cup and the rotor shaft in the axial direction as a consequence of the centrifugal force during operation
Implementation Method 2
a resilient element is associated with the locking bodies and the resilient element cooperates with the locking bodies in such a way that the locking bodies also lock the rotor cup to the rotor shaft in the axial direction at a standstill
Data Source
AI summary
An open-end spinning rotor (1), comprising a rotor shaft (4), a rotor cup (2) and a coupling device (3) releasably connecting the rotor shaft (4) and rotor cup (2). The coupling device (3) has locking bodies (6), arranged in a holding element (5) and lock the rotor cup (2) and the rotor shaft (4) in the axial direction under centrifugal force during operation of the open-end spinning rotor (1). A resilient element (7) is associated with the locking bodies (6) and cooperates with the locking bodies (6) such that the locking bodies (6) also lock the rotor cup (2) to the rotor shaft (4) in the axial direction at a standstill. The holding element (5) is configured as a pin which is formed such that it produces a positive shaft-hub connection between the rotor shaft (4) and rotor cup (2) in conjunction with a correspondingly formed hub (8).