Vane Pump Starting Underwing Extension Section
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Solution Overview
Problem
Vane pumps face difficulties in starting due to short circuits between the suction and pressure areas when the pump is stationary, caused by gravity-induced collapse of blades, leading to inefficient energy use and potential failure to separate these areas.
Innovation Solution
The introduction of a starting underwing extension section that extends radially and connects via a valve channel to the pump outlet, allowing only one wing to separate the pressure area from the suction area, conserving pressure energy and ensuring rapid extension of wings, especially in the separation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all wings are extended using underwing supply areas, then the pump can maintain proper blade extension during operation, but excessive pressure energy is consumed during starting
Solution Approach 1:
The underwing supply area is segmented into a starting underwing extension section and a main underwing supply area. The starting section is positioned to extend only one wing (typically in the separation area between suction and pressure zones), while the main supply area extends the remaining wings. This segmentation allows the pump to use minimal pressure energy during starting by extending only one wing, while still achieving proper separation of suction and pressure areas.
2Stability of the object's composition
If the pump operates with stationary blades, then the blades collapse due to gravity, but this causes short circuits between suction and pressure areas
Solution Approach 1:
The starting underwing extension section is positioned in the separation area between suction and pressure zones. During starting, this section extends one wing before the pump reaches full operating speed, creating a preliminary seal that prevents short circuits. This preliminary action ensures that even when other blades are collapsed due to gravity, the pump can maintain proper separation and begin operation.
3Device complexity
If the valve channel is positioned close to the starting underwing extension section, then the structure is compact, but the wing cannot be properly extended
Solution Approach 1:
The valve channel is positioned at a specific radial distance from the starting underwing extension section, creating an optimal local geometry. This positioning ensures that the valve channel can effectively supply pressure medium to extend the wing in the starting section without requiring the entire structure to be enlarged. The local optimization of the valve channel position maintains structural compactness while ensuring proper wing extension 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 solution enables the vane pump to start efficiently by using displaced working medium to extend a single wing, preventing short circuits and ensuring effective separation of suction and pressure areas, thereby improving starting behavior and reducing energy consumption.
Implementation Method 1
The valve channel can start from the starting underwing extension section... the starting underwing extension section can be connected via a valve channel to a connecting underwing supply area which is connected to the pump outlet
Implementation Method 2
The working medium present in the wing slots is displaced. According to an essential aspect of the invention, the displaced working medium volume is used to extend only a single wing in the starting underwing extension section
Implementation Method 3
In the upper half of the pump, especially in a separation area between the suction and pressure areas, it can happen that the blades collapse or retract when the pump is at a standstill due to the earth's gravity
Data Source
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AI summary
The invention relates to a pump, particularly a vane pump, having a rotor comprising radial vane slots, which are provided for guiding vanes that can be extended from the vane slots radially to the outside in the direction of a stroke contour in order to effect suction in at least one suction region, which is connected to a pump inlet, and in order to effect pressurization of a working medium in at least one pressure region, which is connected to a pressure outlet, and further having a plurality of bottom vane supply regions. The invention is characterized in that a start bottom vane extension section is arranged and designed such that during startup of the pump exactly one vane, which is moving through the start bottom vane extension section with the radial inner end thereof, is extended.