Centrifugal Pump Movable Valve Actuated by Flow Friction
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Solution Overview
Problem
Hydraulic construction units with centrifugal pump assemblies face inefficiencies due to complex mechanisms and energy losses from switching elements and rotation direction reversals.
Innovation Solution
A hydraulic construction unit with a centrifugal pump assembly and a movable valve element, where the valve element is actuated by fluid flow using friction forces along a movable section of the wall, minimizing energy losses and integrating the valve element with the pump assembly for a compact, efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a valve element is actuated by fluid flow using friction forces along a movable section of the wall, then energy loss is minimized and efficiency is improved, but the construction complexity increases due to the integrated design requirement
Solution Approach 1:
The valve element is integrated with the pump assembly, where the valve element forms a movable section of the wall within the pump housing. This merging eliminates separate actuation mechanisms and reduces energy loss by utilizing friction forces directly from the fluid flow along the movable wall section, rather than requiring additional switching elements or rotation direction reversals.
2Device complexity
If the valve element is integrated with the centrifugal pump assembly, then device complexity is reduced and construction is simplified, but the reliability of valve actuation may be compromised
Solution Approach 1:
The valve element acts as a movable section of the wall that is automatically actuated by the fluid flow itself through friction forces. The fluid flow generated by the impeller directly moves the valve element between switching positions without requiring external actuation mechanisms, thereby maintaining reliability while simplifying the overall construction.
3Adaptability or versatility
If switching elements are used in the flow path to direct flow between two outlets or inlets, then flow direction control is achieved, but efficiency losses occur due to the switching elements
Solution Approach 1:
The invention extracts the valve element from being a separate switching component and integrates it as a movable section of the wall within the pump assembly. This eliminates the need for additional switching elements in the flow path, thereby maintaining flow direction control capability while removing the associated efficiency losses.
4Adaptability or versatility
If rotation direction reversal is used to direct flow in different directions, then flow switching between outlets or inlets is achieved, but device complexity increases due to the reversal mechanism
Solution Approach 1:
Instead of reversing the rotation direction of the impeller to control flow direction, the invention inverts the approach by allowing the valve element (movable wall section) to rotate or move independently while the impeller maintains its rotation direction. This eliminates the complexity of rotation direction reversal mechanisms while achieving the same flow switching capability.
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 enables reliable and efficient actuation of the valve element with minimal energy loss, as only frictional energy within the flow path is utilized for movement, maintaining high efficiency and simplifying the construction.
Implementation Method 1
The at least one movable section is movable by way of the fluid flow which runs along the wall, in particular by way of friction forces between the fluid flow and the wall
Implementation Method 2
a centrifugal pump assembly which comprises an electrical drive motor as well as at least one impeller which is rotatingly driven by this
Data Source
AI summary
A hydraulic construction unit includes a centrifugal pump assembly which includes an electrical drive motor and at least one impeller which is driven by the electric drive motor. At least one valve element is arranged such that the valve element is movable by way of a fluid flow which is created by the impeller. At least one section of a wall delimits a flow path in the hydraulic construction unit and is configured to be movable as a moveable section. The movable section of the wall is part of the valve element or is connected to the valve element for movement. The movable section is movable so as to be at least partly effected by friction forces of a fluid flow which runs along the wall.