Cover Element Radial Sealing for Open-End Spinning Rotor Housing

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Solution Overview

Problem

Existing cover elements for open-end spinning devices face challenges in quickly replacing channel plate adapters without introducing leakage air and ensuring precise axial alignment, with previous solutions either being time-consuming or prone to air ingress due to suboptimal sealing.

Innovation Solution

A cover element design featuring a radially acting sealing device with a circumferential sealing surface concentric to the spinning rotor's axis, supported by an elastic ring seal, which ensures proper sealing and precise axial positioning of the channel plate adapter, allowing for easy replacement without screw bolts and minimizing air leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screw bolts are used to fasten the channel plate adapter in the receptacle, then the adapter is securely fixed, but the replacement process becomes time-consuming

Engineering Contradiction:

Improvesecure fixation of adapterVSAvoidreplacement time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The invention extracts the fastening function from the mechanical screw bolt system and relocates it to a magnetic field-based attraction system. The magnet embedded in the receptacle replaces the screw bolts, enabling secure fixation without mechanical fasteners that require threading and tightening operations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention substitutes the mechanical screw bolt fastening system with a magnetic field-based attraction system. The magnet in the receptacle creates a magnetic field that attracts and holds the ferromagnetic channel plate adapter, replacing the need for mechanical threads and fasteners.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If the receptacle is partially open to the rear for easy adapter replacement, then replacement is simplified, but leakage air can enter the rotor housing

Engineering Contradiction:

Improveadapter replacement easeVSAvoidair leakage into rotor housing

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The invention introduces a seal ring as an intermediary element between the receptacle and the channel plate adapter. This seal ring fills the gap that would otherwise allow air leakage, mediating between the open rear design for easy access and the need for airtight sealing.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention employs a flexible seal ring that can deform to conform to the mating surfaces of the receptacle and adapter. This thin film element creates an effective barrier against air leakage while allowing for the open rear design that facilitates easy adapter replacement.

Inventive Principle:

Principle #30Flexible shells and thin films

3Measurement precision

If conical bearing surfaces are used for adapter mounting, then angular alignment is achieved, but small tilts or impurities cause air leakage

Engineering Contradiction:

Improveangular alignment precisionVSAvoidsealing reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The seal ring acts as an intermediary that compensates for minor misalignments and surface imperfections between the conical bearing surfaces. It creates a reliable sealing interface that is not critically dependent on the precision of the conical surface contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the sealing mechanism from relying on precise conical surface contact to using a deformable seal ring that can accommodate parameter variations in alignment and surface quality, thereby maintaining sealing reliability despite small tilts or impurities.

Inventive Principle:

Principle #35Parameter changes

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 effectively prevents air leakage and ensures accurate axial positioning of the channel plate adapter, preventing rotor collisions and enhancing the reliability and efficiency of open-end spinning devices.

Implementation Method 1

zwischen einem Sitz für einen Kanalplattenadapter (12) und dem Kanalplattenadapter (12) eine abdichtende Vorrichtung (37), welche eine zur Drehachse (60) des Rührers (3) parallele Umfangsdichtheitsfläche (38) und einen gegenüberliegend angeordneten elastischen Ringdichtungen (39) aufweist, die radial wirkend sind

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentEP2599905B2Cap element of an open ended spinning machine for closing a rotor housing open to the front and subject to suction

Publication Date: 2019.02.27 SAURER SPINNING SOLUTIONS GMBH & CO KG

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AI summary

The element (8) has retainer in which a channel plate adapter (12) is replaceably fixed. A radially acting sealing device (37) is provided between the retainer and a base body (27) of the adapter in an assembly condition of the adapter. The adapter includes a through hole for arranging a thread withdrawal nozzle. The sealing device includes a circular sealing surface (38), which is arranged concentric to a middle longitudinal axis of a spinning rotor. The rotor rotates in a rotor housing when the element is closed. An elastic annular seal (39) is radially supported against the sealing surface.