Wetting Apparatus Spherical Body Seizing Risk Reduction
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Solution Overview
Problem
Existing window pane wetting apparatuses face issues with unstable flow dynamics and risk of seizing due to limited contact area between the spherical body and the bearing head, leading to inefficient wetting and potential mechanical issues.
Innovation Solution
The apparatus features a flow expansion chamber with resistance projections that homogenize the fluid flow, creating stable oscillating fan jets by maintaining the spherical body at a radial distance from the bearing head, and includes a nozzle arrangement with an antechamber and jet-forming chamber to generate an oscillating fan jet, reducing the risk of seizing and enhancing wetting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the spherical body is held in spaced relation to the back wall forming a flow expansion chamber, then the wetting coverage is improved, but the contact area between the spherical body and bearing head is limited, increasing the risk of seizing
Solution Approach 1:
The bearing head is segmented into multiple functional zones: an open window opening for fluid entry, a region with the annular shoulder for radial spacing, and a region with resistance projections for localized contact. This segmentation allows the spherical body to maintain both adequate wetting coverage and controlled contact points, reducing seizing risk while preserving wetting effectiveness.
2Reliability
If the spherical body is positioned to maintain radial distance from the bearing head, then the risk of seizing is reduced, but the flow dynamics become unstable
Solution Approach 1:
Resistance projections act as intermediary elements between the spherical body and the bearing head's fluid flow. These projections disrupt and homogenize the flow in the expansion chamber, creating stable flow-dynamics conditions that feed into the nozzle arrangement, while the spherical body itself maintains the necessary radial distance to prevent seizing.
3Stability of the object's composition
If resistance projections are added to homogenize the flow, then stable flow dynamics are achieved, but the device complexity increases
Solution Approach 1:
The resistance projections serve multiple functions simultaneously: they homogenize the fluid flow in the expansion chamber, maintains the spherical body's radial positioning, and reduce the contact area to prevent seizing. This multi-functionality achieves stable flow dynamics without proportionally increasing device complexity.
4Reliability
If the spherical body maintains a given radial distance from the inner wall within a relatively large area, then the risk of seizing is reduced, but the contact area increases
Solution Approach 1:
The bearing head exhibits local quality variations: the annular shoulder region provides radial spacing over a relatively large area to prevent seizing, while resistance projections are localized to specific positions to maintain flow homogenization. This localized approach allows the spherical body to maintain radial distance where needed without unnecessarily increasing overall contact area.
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 solution achieves stable flow dynamics and efficient wetting of window panes over a large angular range, reducing the risk of mechanical issues and ensuring consistent fluid distribution, while allowing for a compact design and efficient thermal energy transfer to prevent freezing.
Implementation Method 1
the resistance projections function as fluid-dynamic turbulators, which homogenize the flow in the flow expansion chamber before it enters the antechamber of the nozzle body
Implementation Method 2
the spherical body, together with the annular shoulder, is maintained at a given radial distance from the inner wall of the bearing head within a relatively large area, with the result that the risk of seizing is reduced due to the relatively small area of contact
Data Source
AI summary
In an apparatus for wetting a glass pane, in particular a glass pane of a motor vehicle, a spherical body (15) which supports a nozzle body (20) is inserted into an accommodation space (10) which is formed in a bearing head (9) of an insert body (1). The accommodation space (10) exhibits the spherical body (15) together with resistance projections (12) which fix an annular shoulder and also serve to fluidically stabilize a liquid fluid, which flows into a flow expansion space as a subregion of the accommodation space (10), in the form of, for example, wash water. An oscillating fan-like stream can be reliably generated as a result.