Dynamic Pressure Pump with Dual Inlet Partition for Hydrodynamic Machines
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Solution Overview
Problem
Existing dynamic pressure pumps for hydrodynamic machines require separate designs for clockwise and counterclockwise rotation directions, leading to increased parts variety, potential incorrect installation risks, and undesirable noise due to single inlet openings.
Innovation Solution
A dynamic pressure pump with two oppositely oriented inlet openings that are selectively closable via a partition to form a common working medium channel, eliminating the need for direction-specific designs and reducing noise through a longer common channel and optional diffuser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inlet opening is used in the dynamic pressure pump, then the device complexity is reduced, but flow noise increases and the pump cannot handle both rotation directions
Solution Approach 1:
The single inlet opening is segmented into two separate inlet openings oriented in opposite circumferential directions. Each inlet opening can be selectively closed by a partition, allowing the pump to handle both clockwise and counterclockwise rotation directions without generating flow noise by closing the inappropriate inlet opening.
Solution Approach 2:
The partition is designed to be movable or selectively positionable, allowing it to close one inlet opening while opening the other based on the rotation direction. This dynamic adjustment enables the pump to adapt to different rotation directions and eliminate flow noise without increasing permanent structural complexity.
2Adaptability or versatility
If separate designs are used for clockwise and counterclockwise rotation directions, then the pump can handle both directions, but the parts variety and device complexity increase
Solution Approach 1:
A single dynamic pressure pump design with two oppositely oriented inlet openings and a selective partition serves both clockwise and counterclockwise rotation directions. This universal design eliminates the need for separate pump designs for different rotation directions, reducing parts variety while maintaining full adaptability.
Solution Approach 2:
The pump incorporates asymmetric inlet opening orientations (opposite circumferential directions) with a partition that can selectively close one inlet. This asymmetric design allows the same pump structure to handle both rotation directions by activating the appropriate inlet opening, avoiding the need for symmetric duplicate designs.
3Adaptability or versatility
If valves are used to control the inlet openings, then the pump can selectively handle rotation directions, but flow noise increases and reliability decreases
Solution Approach 1:
The complex valve control mechanism is extracted and replaced with a simpler partition structure. The partition can be positioned to close one inlet opening while opening the other, achieving the same selective functionality without the noise and reliability issues associated with traditional valves.
Solution Approach 2:
The partition acts as an intermediary structure between the two inlet openings, providing a simple, reliable method to selectively close one inlet while opening the other. This intermediary structure eliminates the need for complex valve mechanisms and their associated noise and reliability problems.
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
Enables efficient medium discharge independent of rotation direction without valves, reducing noise and part complexity while maintaining efficiency comparable to known designs.
Implementation Method 1
If the working space is connected to an adjoining room in a way that conducts the working medium, the working medium accordingly also circulates in the adjoining room above the axis of rotation in the direction of the rotation of the primary wheel. Accordingly, by arranging an inlet opening of the dynamic pressure pump in the circumferential direction to the direction of rotation opposite to the direction of flow of the working medium in front of or in the inlet opening, a dynamic pressure can be generated which leads to a conveyance of working medium from the working space or from the adjoining space into the working medium inlet of the dynamic pressure pump
Implementation Method 2
By driving at least the primary wheel, the working medium in the working space in the bladed area of the primary wheel not only experiences an acceleration in the centrifugal direction radially outwards, but it is also accelerated over the circumference of the axis of rotation in the direction of rotation of the primary wheel.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a hydrodynamic machine – comprising a bladed primary wheel that can be driven by a rotary shaft and a bladed secondary wheel, which together form a work chamber that can be filled or is filled with a working medium; - with a dynamic pressure pump for at least indirectly delivering working medium from the work chamber or from the hydrodynamic machine, wherein - the dynamic pressure pump has a first working medium inlet, which projects into the work chamber or an adjacent chamber that is connected in a working medium conducting manner, and has a first inlet opening which is aligned with the rotary shaft in the circumferential direction; and - the dynamic pressure pump has a second working medium inlet, which projects into the work chamber or an adjacent chamber that is connected in a working medium conducting manner, and has a second inlet opening which is aligned to the rotary shaft in the circumferential direction opposite to the first inlet opening; wherein - the first working medium inlet and the second working medium inlet are joined in a working medium conducting manner to a common working medium channel behind the two inlet openings. The hydrodynamic machine according to the invention is characterized in that the first working medium inlet and the second working medium inlet extend adjacent to each other in the same direction in the flow direction of the working medium, seen from the common working medium channel, separated by a separation wall.