Pot-like Nozzle Ring Axial Sealing for Knot Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for producing intertwining knots in multifilament threads face challenges in minimizing compressed air losses and achieving a compact seal between the stator and nozzle ring, leading to friction and wear issues due to narrow sealing gaps.
Innovation Solution
The nozzle ring is designed with a pot-like structure and an end wall having a disc-like end sealing surface, interacting with the stator's end sliding surface to create an axial sealing gap with a constant value, independent of centrifugal forces, and a radial sealing gap limited by the lateral end wall, combined with grooves on the sliding surfaces to enhance sealing effects and prevent friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a narrow sealing gap is used between the nozzle ring and stator, then compressed air losses are reduced, but friction and wear increase due to centrifugal force and heat development
Solution Approach 1:
The invention introduces a second sealing gap in the axial direction between the end wall of the nozzle ring and the end face of the stator, perpendicular to the original radial sealing gap. This dimensional change allows the sealing function to be distributed across two independent gaps, reducing the severity of wear and friction in each individual gap while maintaining overall sealing effectiveness.
2Loss of energy
If a narrow sealing gap is used between the nozzle ring and stator, then compressed air losses are reduced, but production expenditure increases
Solution Approach 1:
By adding the axial sealing gap as a second dimension, the invention allows each individual sealing gap to be wider and easier to manufacture, while the combined sealing effect of both gaps achieves the required compression air loss reduction. This eliminates the need for expensive, precision-narrow gaps in a single direction.
3Loss of energy
If a narrow sealing gap is used between the nozzle ring and stator, then compressed air losses are reduced, but the seal becomes less compact and more exposed to environment
Solution Approach 1:
The axial sealing gap extends the sealing arrangement in the axial direction, creating a more compact overall seal structure that is better shielded from the environment. The two sealing gaps work together to provide both sealing effectiveness and structural compactness.
Solution Approach 2:
The end wall of the nozzle ring is formed in a pot-like manner with the axial sealing gap integrated into the end wall structure, creating a nested configuration that shields the sealing surfaces from the environment while maintaining compactness.
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 configuration achieves the lowest possible air losses and prevents friction between the nozzle ring and stator, ensuring a secure operation with improved sealing efficiency and reduced wear, even at high speeds.
Implementation Method 1
The stator has an end sliding surface on one end side which interacts with the end sealing surface of the end wall in order to provide air sealing
Implementation Method 2
the radial sealing gap formed between the sealing surface of the nozzle ring and the sliding surface of the stator is limited by the lateral end wall of the nozzle ring
Implementation Method 3
The pressure chamber is connected to a compressed air source so that, during the interaction of the nozzle bore and the chamber opening, a compressed air jet is produced in the thread guide groove of the nozzle ring
Implementation Method 4
the cohesion of the individual filament strands in the thread is produced by so-called intertwining knots. Such intertwining knots are produced by a compressed air treatment of the thread
Data Source
AI summary
A device for producing intertwining knots in a multifilament thread has a rotating nozzle ring with an encircling guide groove on an outer casing and an encircling sealing surface on an inner casing. At least one nozzle bore opens radially into the guide groove and passes through the nozzle ring. The nozzle ring is guided on a stator that has an encircling sliding surface on its periphery for guiding the nozzle ring and that forms a pressure chamber having a chamber opening that opens into the sliding surface. The sealing surface of the nozzle ring interacts with the sliding surface of the stator in order to provide air sealing. The nozzle ring is formed in a pot-like manner with an end wall having a disc-like end sealing surface which interacts with an end sliding surface formed on an end side of the stator to provide air sealing.