Atomizing Nozzle Guidance Geometry for Quiet Valve Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing atomizing nozzle arrangements often produce noise due to turbulence and vibrations when closing, leading to potential dripping issues.
Innovation Solution
The integration of a guidance element with a smooth surface transition and a gap between the guidance element and the bore wall, along with a symmetrically curved valve element, ensures precise closure and minimizes noise by maintaining a liquid layer and accelerating the liquid flow, reducing turbulence and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve element is pressed against the valve seat by restoring means, then the valve closure reliability is improved, but noise and vibrations occur during operation
Solution Approach 1:
A guidance element is introduced as an intermediary component between the valve element and the housing bore. This guidance element features a smooth surface transition that guides the liquid flow, preventing turbulence and vibrations while the valve element maintains reliable closure against the valve seat through restoring means.
Solution Approach 2:
The guidance element incorporates a smooth curved surface transition instead of sharp edges or abrupt changes. This curved geometry smoothly redirects the liquid flow away from the valve element, eliminating turbulence-induced vibrations and noise while maintaining effective valve closure.
2Reliability
If the valve element is aligned with the valve seat for complete closure, then dripping is prevented, but the device complexity increases
Solution Approach 1:
The guidance element serves multiple functions simultaneously: it aligns the valve element with the valve seat for complete closure, guides the liquid flow to prevent turbulence, and provides a smooth surface transition to reduce vibrations. This multi-functionality achieves reliable valve closure without proportionally increasing device complexity.
3Productivity
If the liquid flow is accelerated through the nozzle, then atomization quality is improved, but turbulence and noise increase
Solution Approach 1:
The guidance element acts as an intermediary flow guide that smoothly accelerates the liquid toward the orifice while preventing turbulence. The smooth curved surface transition ensures the liquid is directed efficiently for good atomization quality without generating excessive noise or vibrations.
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 design effectively reduces noise and ensures complete valve closure, preventing dripping by aligning the valve element with the valve seat and maintaining a non-turbulent flow, thus enhancing the atomizing nozzle's operational efficiency.
Implementation Method 1
The guidance element aligns the valve element with respect to the valve seat, so that the valve can fully be closed when the pressure at the inlet is decreased and the valve element contacts the valve seat
Implementation Method 2
the guidance element does not slide along the wall but has in all operating conditions a certain distance to the inner wall of the bore. Thus, there is always a liquid layer between the guidance element and the inner wall of the bore
Implementation Method 3
the flow area between the guidance element and the inner wall of the bore is largest at the end of the guidance element adjacent the valve element. Thus, the liquid supplied to the inlet of the nozzle arrangement is accelerated when it passes the guidance element
Data Source
Figure 1~3
AI summary
An atomizing nozzle arrangement (1) is described comprising a housing (2, 3) having an inlet, a valve seat (6), a valve element (7) interacting with the valve seat (6), restoring means (8) acting on the valve element (7), and an orifice (9), wherein the valve element 7 cooperates with a guidance element (12) which is arranged in a bore of the housing (2, 3). In such an atomizing nozzle arrangement noise should be kept low. To this end a combination of the guidance element (12) and the valve element (7) comprises a surface having a smooth transition in a direction away from the valve seat (6).