Jet Suction Box With Expanding Slot Nozzle for Lower Pressure Loss
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Solution Overview
Problem
Existing jet suction technologies for hydroentanglement devices are inefficient due to high energy and design requirements, leading to increased noise emission and resource consumption, and result in inconsistent strengthening of fibrous material webs with high-pressure liquid jets.
Innovation Solution
A jet suction box with slot-shaped suction nozzles that increase in width towards the interior, reducing pressure loss and allowing for a moderate vacuum and high flow rate, which enhances the suction of liquid and air mixture, minimizing moisture on the fibrous material web and reducing drying efforts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a suction nozzle with constant or narrowed nozzle width is used, then the suction rate is maintained, but the pressure loss increases significantly
Solution Approach 1:
The suction opening width is changed as a variable parameter along the flow direction. The width increases from inlet to outlet, creating a gradually expanding cross-section that optimizes both pressure recovery and flow rate. This parameter change resolves the contradiction by allowing the nozzle to maintain suction rate while minimizing pressure loss through the expanding geometry.
Solution Approach 2:
The suction opening geometry transitions from a static constant width design to a dynamic expanding width design. The cross-sectional area increases along the flow direction, creating a divergent passage that adapts to the flow conditions and reduces pressure loss while maintaining high suction rate.
2Productivity
If a high vacuum is generated to increase suction rate, then the liquid and air mixture is suctioned more effectively, but the energy consumption and noise emission increase
Solution Approach 1:
The expanding cross-section parameter change allows the system to achieve high suction rates at moderate vacuum levels. The gradual expansion reduces flow resistance and pressure loss, enabling effective suction without requiring excessive vacuum pressure, thus reducing energy consumption and noise emission.
3Productivity
If a high vacuum is generated to increase suction rate, then the liquid and air mixture is suctioned more effectively, but the device dimensions and complexity increase
Solution Approach 1:
The expanding suction opening geometry enables the system to achieve high suction rates with moderate vacuum, allowing the use of smaller, simpler vacuum generators. The parameter change in opening width compensates for the reduced vacuum capability, maintaining productivity while reducing device complexity.
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 efficient and economical jet suction with reduced noise and resource consumption, resulting in stronger and more consistent strengthening of fibrous material webs with lower energy and design efforts, while allowing for effective recovery and reuse of water.
Implementation Method 1
The pressure loss on the nozzle outlet side may be kept minimal due to the increase in the nozzle width in the jet direction or suction direction
Implementation Method 2
a moderate vacuum in the box interior and a vacuum generator of small dimensions are sufficient for obtaining a desired vacuum on the inlet side of the suction nozzle
Data Source
AI summary
A jet suction method and a jet suction box (14), for a suctioning apparatus (6) of a device (1) for water jet consolidation of a fibrous material web (2), sucks in the liquid jets (4) emitted by the device (1) for water jet consolidation and issuing from the fibrous material web (2) again. A box casing (18) thereof has arranged therein at least one slot shape casing opening (20) which leads to a box interior (17). The jet suction box (14) has on the box casing (18) at least one nozzle attachment (24) which is arranged above the casing opening (20) and which has a slot shape suction opening (25) with a width steadily increasing towards the box interior (17) and towards the casing opening (20). A width of the casing opening (20) is equal to or greater than the outlet-side width of the suction opening (25).