Filling Valve Outer Wall Angle for Flow Efficiency
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Solution Overview
Problem
Existing filling valves experience high pressure losses and limited maximum volume flow due to large angles of inclination between inner and outer walls, restricting press cylinder speed and leading to cavitation issues when trying to increase flow rates.
Innovation Solution
Reducing the angle of inclination of the outer wall to 20°-25° relative to the axis, combined with optimized geometric features such as convex rounding and annular beads, to enhance flow efficiency and allow for increased volume flow without cavitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the angle of inclination of the inner and outer walls is increased to 40° or more, then the structural strength and guidance of the poppet valve stem is improved, but the pressure loss increases and maximum volume flow is limited
Solution Approach 1:
The patent applies different angle of inclination values to different wall sections. The outer wall has a smaller angle (20°-25°) in the flow direction to reduce pressure loss, while the inner wall has a larger angle (40°-60°) to provide structural strength and proper guidance for the poppet valve stem. This local differentiation resolves the contradiction between strength and energy loss.
Solution Approach 2:
The patent creates an asymmetric passage configuration where the inner and outer walls have different angles of inclination relative to the axis. This asymmetric design allows each wall to fulfill its specific function - the outer wall optimized for flow characteristics and the inner wall optimized for structural support and valve guidance.
2Ease of operation
If the angle of inclination of the inner and outer walls is increased to 40° or more, then the guidance for the poppet valve stem is improved, but the maximum volume flow is limited due to high pressure loss
Solution Approach 1:
The patent assigns different angle characteristics to different walls based on their functional requirements. The outer wall uses a smaller angle (20°-25°) to maximize volume flow and minimize pressure loss, while the inner wall uses a larger angle (40°-60°) to provide adequate guidance for the poppet valve stem during operation.
Solution Approach 2:
The patent resolves the guidance issue by considering the three-dimensional flow pattern and passage geometry rather than relying solely on wall angle. The kidney-shaped cross-section and the specific arrangement of inner and outer walls create flow patterns that naturally guide the poppet valve while maintaining low pressure loss.
3Ease of manufacture
If the angle of inclination is increased to 60° or more, then the passage can be machined more easily, but the pressure loss becomes excessively large causing cavitation
Solution Approach 1:
The patent optimizes the angle of inclination parameter to a specific range (20°-25° for outer wall, 40°-60° for inner wall) that balances manufacturability with flow performance. This parameter optimization prevents excessive pressure loss and cavitation while maintaining reasonable machining requirements, avoiding the extremes of both very shallow and very steep angles.
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 configuration increases the maximum volume flow by approximately 30%, enabling higher press piston speeds while minimizing pressure losses and turbulence, and simplifies machining processes.
Implementation Method 1
The flow is not uniformly fast in the entire available flow cross-section, but there are relatively many dead zones in the flow pattern
Data Source
AI summary
In a filling valve (F) with a seat housing (1) having a seat (24) for a poppet valve (15), in which passages (4) to the seat (24) are defined between webs (3) supporting a control (2), each of which has an outer wall (13) and an inner wall (31) which are inclined obliquely inwards in the direction of the axis (40) at least substantially parallel to each other, the outer wall (13) in the seat housing (1) made of steel has an angle of inclination (α) between 20° and 25° with respect to the axis (40) of the seat (24).