Radial Piston Pump With Integrated High-Pressure Suction
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Solution Overview
Problem
Conventional radial piston pumps are not suitable for conveying fluids under high pressures exceeding 10 bar, particularly in applications like mobile refueling of vehicles with hydrogen, where the fluid on the suction side is already under high pressure up to 1000 bar.
Innovation Solution
A radial piston pump design featuring a high-pressure-resistant suction line structure that connects the suction port to the suction inlet of each pump element, allowing for fluid conveyance under pressures between 10 bar and 1000 bar, with the structure being partially or fully integrated into the pump housing or formed by separate piping arrangements, and pump elements arranged in multiple axial planes to increase delivery volume efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional radial piston pumps are used for high-pressure applications (above 10 bar), then the pump can handle high suction pressures up to 1000 bar, but the pump structure becomes complex and requires additional high-pressure-resistant components
Solution Approach 1:
The patent merges the suction line structure with the pump housing by integrating the suction collecting section and suction riser section directly into the housing structure. This integration eliminates separate high-pressure-resistant piping arrangements and reduces the overall number of components while maintaining the ability to handle suction pressures up to 1000 bar.
Solution Approach 2:
The pump is divided into multiple axial pump planes with pump elements arranged in at least two different axial positions. This segmentation allows the pump to handle high suction pressures while maintaining a manageable structure through modular arrangement of pump elements across multiple planes.
2Productivity
If pump elements are arranged in multiple axial planes to increase delivery volume, then the pump achieves higher productivity, but the device complexity increases
Solution Approach 1:
The pump elements are segmented into multiple axial planes with at least two different axial positions relative to the pump axis. This segmentation enables increased delivery volume by allowing more pump elements to be incorporated while maintaining a structured, modular arrangement that controls complexity.
Solution Approach 2:
The integrated suction line structure serves multiple functions: it provides high-pressure fluid conveyance, acts as a structural support element, and eliminates the need for separate piping arrangements. This multi-functionality reduces overall device complexity while enabling higher productivity.
3Ease of manufacture
If a separate piping arrangement is used for the suction line structure, then the pump can be designed with modular components, but the manufacturing complexity and cost increase
Solution Approach 1:
The suction line structure is merged with the pump housing, eliminating the need for separate piping arrangements. This integration reduces the number of components and simplifies manufacturing while maintaining modular design capabilities through the use of standardized housing structures.
Solution Approach 2:
The pump housing is designed to serve multiple functions including structural support, fluid containment, and integration of the suction line structure. This multi-functionality reduces the overall number of components and simplifies manufacturing processes while maintaining ease of assembly.
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 pump operates efficiently, avoiding cavitation and reducing wear, enabling operation at higher speeds with reduced components and costs, while maintaining high-pressure fluid conveyance without the need for return elements, and allowing for modular expansion.
Implementation Method 1
the pump shaft is configured to drive the pump elements via the eccentric in order to convey the fluid under high pressure from the suction port to the pressure port
Implementation Method 2
a high-pressure-resistant suction line structure which connects the suction port to the at least one suction inlet of each pump element
Implementation Method 3
Radial piston pumps are well known and are used for pumping fluid at pressure-side loads of up to 1000 bar and more
Data Source
AI summary
A radial piston pump for conveying fluid under high pressure has a suction port, a pressure port and a plurality of pump elements for conveying the fluid under high pressure from the suction port to the pressure port. Furthermore, the radial piston pump includes a high-pressure-resistant suction line structure connecting the suction port to at least one suction inlet of each pump element.