Axial Spray Nozzle Vent Valve for Stable Plug Operation
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Solution Overview
Problem
Existing axial oil spray nozzles in hydraulic or pneumatic circuits exhibit unstable behavior, high head loss, and premature wear due to back pressure and direct oil passage through the compression spring, limiting flow performance and reactivity.
Innovation Solution
An axial fluid spray nozzle with a vent valve design featuring a radially vented valve guide and compression spring isolation from the fluid flow, which reduces back pressure and stabilizes the plug's operation, allowing for higher fluid jet velocities and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plug is directly exposed to back pressure from oil flow, then the valve can respond to pressure changes, but the plug behavior becomes unstable and causes premature wear of the compression spring and valve seat
Solution Approach 1:
The internal conduit is divided into two separate channels: a first channel for oil flow from inlet to outlet, and a second channel providing a vent path from the plug region to the outlet. This segmentation isolates the plug from back pressure while maintaining pressure responsiveness, eliminating unstable plug behavior and reducing wear on the compression spring and valve seat.
Solution Approach 2:
The vent channel acts as an intermediary pathway that allows pressure equalization without exposing the plug to harmful back pressure. By providing this intermediate vent path, the system maintains valve responsiveness while protecting the plug and compression spring from destabilizing forces, thereby extending component life.
2Device complexity
If the compression spring is directly in the oil flow passage, then the valve structure remains simple, but oil passage through the spring disturbs its operation and accelerates wear
Solution Approach 1:
The internal conduit is segmented into separate flow channels: the first channel carries oil from inlet to outlet, while the second channel provides a vent path that bypasses the compression spring. This segmentation isolates the spring from direct oil exposure, eliminating disturbances to spring operation and preventing oil-induced wear, while adding minimal structural complexity.
3Area of stationary object
If the axial spray nozzle is used when small radial dimensions are required, then the axial configuration is suitable, but the existing design suffers from head loss and flow limitations
Solution Approach 1:
By segmenting the internal conduit into separate channels with the vent path isolated from the main flow, head losses are eliminated. This allows the axial nozzle to achieve higher fluid jet velocities and improved flow capacity while maintaining compact radial dimensions, resolving the trade-off between size and performance.
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 enhances the reactivity and stability of the axial fluid spray nozzle, reducing vibrational behavior and wear, while maintaining high fluid jet velocities and improving mechanical performance by isolating the compression spring from the fluid flow.
Implementation Method 1
a plug (5) mounted free to slide axially in the internal conduit (2), the plug (5) being pushed into contact with the port (4a) in the valve seat (4) by a compression spring (6)
Implementation Method 2
a radial vent channel (91), connecting the inside of the tubular guide sleeve (50) at the reserve section (55b), to the outside of the tubular guide sleeve (50)
Implementation Method 3
when oil is flowing in the internal conduit 2, a back pressure opposite the direction of said flow is exerted on the plug
Data Source
AI summary
A spray nozzle comprising: a body comprising a duct, a seat arranged at the first end, and including an opening forming an inlet, a guide comprising a tubular jacket and a retaining member, the retaining member retaining the jacket in the duct, a plug mounted to slide axially in the channel of the jacket, the plug being pushed back against the opening by a spring, and in abutment against the bottom of the jacket, the guide comprising a radial vent, which comprises a vent channel isolated from the flow of fluid and connecting the inside of the guide jacket to a bore formed in the body of the spray nozzle.