Inclined-Plate Axial Piston Pump Suction Layout for Stable Flow
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Solution Overview
Problem
Axial piston pumps with inclined plates for high pressures experience significant fluctuations in flow rate due to their design, which affects their efficiency and compactness.
Innovation Solution
The design incorporates a head with multiple cylinders arranged in parallel, a primary duct positioned between the central axes of the cylinders, and branch ducts with curved surfaces to improve fluid communication and reduce flow rate fluctuations, along with a method using a disc milling cutter to create branch ducts for faster and cheaper manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If axial piston pumps with inclined plate are designed for high pressures with simple construction, then device complexity is reduced, but delivery flow rate fluctuation increases significantly
Solution Approach 1:
The suction channel is segmented into a primary duct and multiple branch ducts, with the primary duct positioned between cylinder axes and branch ducts connecting to individual cylinders. This segmentation allows optimized fluid distribution to reduce flow rate fluctuations while maintaining overall construction simplicity.
Solution Approach 2:
The primary duct is positioned in a different spatial dimension - between the central axes of cylinders rather than outside them. This dimensional repositioning optimizes fluid distribution paths and reduces flow rate fluctuations without increasing device complexity.
2Reliability
If the primary duct is positioned between the central axes of the cylinders, then delivery flow rate fluctuation is reduced, but the device complexity increases
Solution Approach 1:
The suction channel components (primary duct and branch ducts) are merged into a single integrated structure made directly in the head, eliminating the need for separate assemblies and reducing overall device complexity while achieving improved flow rate stability.
Solution Approach 2:
The head itself serves dual functions - as a structural component and as the housing for the suction channel. The suction channel is made directly in the head, allowing the head to create its own fluid distribution system without external components.
3Loss of time
If the suction channel is made in the head, then assembly operations are faster and axial compactness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The suction channel is merged with the head as a single integrated component, eliminating separate assembly operations and reducing assembly time. The integrated design also reduces the number of parts and assembly steps.
Solution Approach 2:
The head serves multiple functions - structural support, fluid distribution housing, and suction channel formation. This multi-functionality reduces the total number of components and simplifies the overall device structure.
4Productivity
If branch ducts are designed with curved surfaces, then fluid-dynamic efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The branch ducts are designed with curved surfaces and concave portions that optimize fluid flow paths and reduce turbulence, improving fluid-dynamic efficiency. The curved geometry follows natural flow patterns.
Solution Approach 2:
The branch ducts with curved surfaces are merged into the head as an integrated structure, allowing complex curved geometries to be manufactured in a single casting or machining operation rather than requiring separate fabrication and assembly of duct components.
Data Source
AI summary
The present invention concerns an axial piston pump (1, 1′, 1″,1′″) for the pumping of a liquid comprising: a head (20) in which there is at least partially made a plurality of cylinders (25) in a number greater than three, with central axes parallel between them, a plurality of pistons (75) each of which slide in a respective cylinder (25) of the plurality of cylinders (25) for the pumping of the liquid, and a suction channel of the liquid to pump, which is equipped with a primary duct (140) and a plurality of branch ducts (145, 145′,145″), each of said branch ducts (145, 145′,145″) being adapted to place the primary duct (140) in fluid communication with a respective cylinder (25) of the plurality of cylinders (25), in which the primary duct (140) is positioned between the central axes of the cylinders (25).