Jet Manifold Annular Gap for Uniform Water Jet Pressure
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Solution Overview
Problem
Nozzle bars for processing fibers with water jets face challenges in achieving uniform water jet formation and minimizing total pressure loss, which leads to inefficient energy use and potential turbulence, especially when designing for textile processing.
Innovation Solution
A nozzle bar design featuring a circumferential annular gap between the impact body and the pressure distribution chamber with a specific gap width of 5mm to 8mm, combined with a rod-shaped impact body and spacers for easy maintenance, ensures even pressure distribution and minimizes pressure loss by promoting laminar flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If water is fed into the pressure chamber through an opening at high pre-pressure, then the water inflow speed is high, but eddy formation increases and pressure distribution becomes non-uniform
Solution Approach 1:
A pressure distribution chamber is introduced as an intermediary between the pressure chamber and the nozzle strip. This intermediate chamber receives water through multiple flow bores from the pressure chamber and distributes it uniformly to the nozzle strip, mediating the transition from high-speed inflow to uniform pressure distribution and eliminating eddy formation.
2Area of stationary object
If the nozzle bar is made elongated to cover the entire width of textile material, then the processing coverage is complete, but pressure loss increases due to the long flow path
Solution Approach 1:
The pressure distribution chamber extends the pressure distribution in a longitudinal dimension along the nozzle bar. By distributing flow bores along the length of the pressure chamber and having the pressure distribution chamber extend parallel to it, the system achieves uniform pressure across the entire elongated nozzle strip without excessive pressure loss, effectively adding a dimensional approach to pressure equalization.
3Device complexity
If the impact body is placed in the center of the pressure distribution chamber, then the structure is simple, but flow turbulence increases and pressure loss is not minimized
Solution Approach 1:
The impact body is positioned asymmetrically within the pressure distribution chamber, specifically shifted towards the inflow side rather than being centered. This asymmetric positioning creates a more favorable flow path that reduces turbulence and minimizes pressure loss, demonstrating how deviating from symmetric arrangement can optimize fluid flow characteristics.
4Stability of the object's composition
If the pressure chamber and pressure distribution chamber are formed separately with flow bores, then pressure distribution is improved, but the device complexity increases
Solution Approach 1:
The pressure distribution chamber is merged with the lower part of the nozzle bar structure, integrating the pressure distribution function into the existing elongated lower part. This merging approach allows the pressure distribution chamber to extend parallel to the pressure chamber while sharing structural elements, reducing overall device complexity compared to completely separate chambers.
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 achieves homogeneous pressure distribution and low-vortex flow, resulting in uniform water jets across the nozzle bar length with minimal pressure loss, optimizing energy efficiency and ease of maintenance.
Implementation Method 1
a plurality of flow bores are distributed over the length of the upper part in the partition between the pressure chamber and the pressure distribution chamber, through which the water can be guided from the pressure chamber into the pressure distribution chamber
Implementation Method 2
An impact body is introduced into the pressure distribution chamber... This should enable a more even flow around the impact body, so that the pressure loss is minimized by less turbulence
Data Source
Figure 1
Figure 2~3
AI summary
The present invention relates to a jet manifold (1) for water jet processing fibers, comprising an elongate upper part (10) in which an elongate pressure chamber (11) is inserted, said pressure chamber (11) having an end face with an opening (12) for feeding water and an opposite closed end face. A pressure distribution chamber (13) is inserted in the upper part (10) and extends in parallel to the pressure chamber (11). Distributed over the length of the upper part (10) a plurality of through-flow bores (14) are introduced into the intermediate wall (15) between the pressure chamber (11) and the pressure distribution chamber (13), the water being conductible therethrough from the pressure chamber (11) to the pressure distribution chamber (13). A rod-shaped deflecting element (20) is arranged in the pressure distribution chamber (13) and extends longitudinally through the pressure distribution chamber (13) in a centered manner. The jet manifold further comprises an elongate lower part (16) which is arranged on the upper part (10) in a fluid-tight manner, a nozzle strip (17) with bores (18) for water to exit being received in or on the lower part (16). A slot (19) is introduced into the upper part and extends between the pressure distribution chamber (13) and the nozzle strip (17) to feed water to the nozzle strip (17). According to the invention, a peripheral annular gap (S) having a gap width of 5 mm to 8 mm is formed between the exterior of the deflecting element (20) and the interior of the pressure distribution chamber (13).