Vane Cell Pump Guide Ring for Efficiency and Assembly
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Solution Overview
Problem
Vane cell pumps face challenges in achieving high efficiency while being economically manufactured and assembled, with existing designs being overly complex and costly.
Innovation Solution
The introduction of a guide ring with a C-shaped cross-section that provides a forced guiding path for the guiding blocks, ensuring fluid-tight seating and continuous axial accessibility of working chambers, simplifying installation and assembly by eliminating the need for special penetrations and undercuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pendulum slide valve pump design is used to increase efficiency, then pumping efficiency is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The pump is divided into modular components: an inner rotor with radially movable vane elements, an outer rotor, and a stator with working chambers. This segmentation allows each component to be optimized independently while maintaining overall efficiency, resolving the contradiction between efficiency and complexity.
Solution Approach 2:
Instead of having the vane elements pivot within the inner rotor as in traditional pendulum slide valve pumps, the invention inverts the guidance mechanism by providing guide surfaces on the stator that actively guide the vane elements. This inversion simplifies the rotor structure while maintaining the efficiency benefits of guided vane motion.
2Ease of manufacture
If traditional vane cell pump design is used, then manufacturing is simple and economic, but pumping efficiency is insufficient
Solution Approach 1:
The vane elements are designed to be self-guiding through passive guide surfaces on the stator. The vane elements automatically follow the guide surfaces during rotation, eliminating the need for complex active control mechanisms or precision bearings, thus maintaining manufacturing simplicity while improving efficiency through better vane guidance.
Solution Approach 2:
The invention changes the geometric parameters of the working chambers and guide surfaces to optimize fluid displacement and vane motion. By carefully designing the curvature and positioning of guide surfaces, the pump achieves higher efficiency without requiring complex mechanical structures, maintaining ease of manufacture.
3Reliability
If guiding elements are added to improve vane guidance, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The guidance function is merged into the stator structure itself through integrated guide surfaces. Rather than adding separate guide elements or mechanisms, the stator's internal geometry provides the necessary guidance, ensuring reliable vane motion while avoiding additional components that would increase complexity.
Solution Approach 2:
The guide surfaces on the stator act as intermediaries between the rotating vane elements and the fixed pump housing. These surfaces mediate the interaction by providing a controlled path for vane motion, ensuring reliable operation without requiring direct mechanical connections or complex control mechanisms.
4Reliability
If control elements are added to close working chambers, then sealing is improved, but accessibility and flow are disturbed
Solution Approach 1:
The invention replaces mechanical sealing elements (such as pistons or valves) with a hydrodynamic sealing approach. The working chambers are closed by the natural positioning of vane elements against the stator walls under fluid pressure, eliminating the need for additional control elements that would block access or disturb flow while maintaining effective sealing.
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 guide ring configuration results in a more straightforward construction, easier installation, and improved fluid handling, maintaining secure seating even at high speeds and under pressure conditions, while allowing for easy assembly and reduced manufacturing complexity.
Implementation Method 1
The guide ring serves to guide the guiding block so that the latter always, that is, in every operating situation of the vane cell pump, lies on the internal circumferential surface of the stator
Implementation Method 2
Through the change in volume of the conveyor cells, fluid is at first suctioned into the conveyor cells and then ejected again
Implementation Method 3
The end regions of the vane elements slide on the central element or the outer ring
Data Source
AI summary
The disclosure relates to a vane cell pump having an inner rotor (12) and a plurality of vanes (18) which are secured in a pivotable manner to the external rotor (28) and which are displacably mounted in a radial manner in the inner rotor, essentially in radial slots (16). The external rotor is formed on guide blocks (22). Said guide blocks are guided, with the axial front sides thereof, on the guiding path and are guided along the internal circumferential surface of a stator (26). The guiding path is arranged in a guide ring (36).