Axial Piston Control Plate Turbulence Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Axial piston machines with oblique axis construction experience turbulence and pressure loss during high flow dynamics, leading to inefficiencies in pressure change and machine performance.
Innovation Solution
A control plate with a kidney-like control opening and through-recess design, where the first wall portion is positioned relative to the rotation axis to reduce turbulence and pressure loss, and a pivot axis allows for adjustable displacement volume while maintaining optimized flow behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through-recesses extend from the parallel with the rotation axis of the cylinder drum with substantially cylindrical inner wall portions, then the structure is simple and easy to manufacture, but turbulence occurs during high flow dynamics leading to pressure loss
Solution Approach 1:
The patent applies local quality by differentiating the configuration of wall portions in different regions of the through-recesses. The first wall portions are configured to extend relative to the rotation axis to reduce turbulence in high-flow regions, while the second wall portions maintain a cylindrical configuration. This localized differentiation optimizes flow characteristics where needed without compromising overall structural simplicity.
Solution Approach 2:
The patent employs curvature by configuring the first wall portions to extend relative to the rotation axis, creating a more streamlined, curved flow path compared to purely cylindrical walls. This curvature helps guide the pressure medium more smoothly through the recesses, reducing turbulence and pressure loss while maintaining manufacturability.
2Ease of manufacture
If the control plate is designed with conventional through-recesses, then manufacturing is straightforward, but turbulence and pressure loss occur during high flow dynamics
Solution Approach 1:
The invention applies local quality by configuring specific wall portions (first wall portions) to extend relative to the rotation axis in regions where high flow dynamics occur, while other wall portions (second wall portions) maintain a simpler cylindrical configuration. This localized optimization improves pressure change efficiency without significantly complicating the overall manufacturing process.
Solution Approach 2:
The patent uses curved surface geometry for the first wall portions that extend relative to the rotation axis, creating smoother flow paths that reduce turbulence. This curved configuration enhances the efficiency of pressure change by improving flow behavior, while the overall structure remains manufacturable.
3Loss of energy
If the first wall portion extends relative to the rotation axis to reduce turbulence, then pressure loss decreases, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by implementing the extended wall portion configuration only in specific regions where turbulence is most problematic, rather than throughout the entire through-recess structure. This localized approach reduces pressure loss effectively while minimizing the increase in overall structural complexity.
Solution Approach 2:
The invention segments the wall portions of the through-recesses into different types: first wall portions that extend relative to the rotation axis for turbulence reduction, and second wall portions that maintain a simpler configuration. This segmentation allows the complex features to be concentrated only where needed, balancing performance improvement with structural simplicity.
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 reduces turbulence and pressure loss, enhancing the efficiency of the axial piston machine by improving flow behavior and maintaining efficient pressure medium connections across pivot angles.
Implementation Method 1
occurrences of turbulence which can lead to pressure loss and in an unfavorable case to cavitation may occur
Data Source
AI summary
A control plate, for alternatingly fluidically connecting hydrostatic operating chambers, in particular of an oblique axis type axial piston machine, with pressure medium connections, includes a first end face, a second end face, at least a first recess, a first kidney-like control opening, and at least one through-recess. The first face extends transversely to a rotation axis. The second face faces away from the first face. The first recess is bounded in the first end face by the first control opening, and at least partially forms the at least one through recess, which extends toward the second end face from the first end face at an end portion of the first control opening, and which is arranged in or counter to a rotation direction of the rotation axis. An oblique axis construction type axial piston machine includes such a control plate.