Sinusoidal Pump Blocking Device Sealing
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Solution Overview
Problem
Existing sinusoidal pumps face challenges in achieving effective sealing of the blocking device, leading to potential backflow of fluid, which affects the efficiency and reliability of the pumping process.
Innovation Solution
A blocking device with multiple blocking elements, each featuring a U-shaped sealing profile and contacting faces, is designed to abut against the rotor collar and hub, forming multiple sealing lines to enhance sealing efficacy without complex mounting requirements, and can be uniformly designed to simplify production and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single blocking element is used to block the pump duct, then the device complexity is reduced, but the sealing action is insufficient leading to fluid backflow
Solution Approach 1:
The blocking device is segmented into multiple blocking elements (at least two) that are arranged axially adjacent to each other. Each blocking element has sealing surfaces that abut against the rotor collar and rotor hub, creating multiple sealing lines. This segmentation allows the device to achieve reliable sealing without requiring each individual element to be overly complex, as the sealing function is distributed across multiple simpler elements.
Solution Approach 2:
The sealing action is enhanced by extending the sealing function into the axial dimension. Multiple blocking elements are arranged axially adjacent to each other along the pump duct, creating sealing lines at different axial positions. This dimensional arrangement prevents fluid backflow more effectively than a single blocking element, while each element itself maintains a relatively simple structure.
2Reliability
If multiple blocking elements are used to improve sealing, then the sealing action is enhanced, but the mounting complexity increases
Solution Approach 1:
Multiple blocking elements are merged into a single integrated blocking device assembly. The elements are arranged axially adjacent to each other and can be installed as a unit, with each element having contacting faces that abut against one another or against seats in the pump duct. This merging approach maintains enhanced sealing performance while simplifying the mounting process, as the elements work together as a coordinated system rather than requiring separate complex installations.
3Reliability
If blocking elements are designed with complex sealing profiles, then the sealing efficacy is improved, but the manufacturing cost increases
Solution Approach 1:
The blocking elements are designed with uniform or substantially identical structures, each featuring sealing surfaces that abut against the rotor collar and rotor hub. This homogeneity allows for standardized manufacturing processes and reduces production costs, while the collective arrangement of multiple identical elements achieves the required sealing efficacy. The contacting faces are also designed to be uniform, facilitating easier assembly and reducing manufacturing complexity.
Data Source
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AI summary
Blocking device (50) for a pump (10) having a rotor (26) that is rotatable about a rotation axis (A) in a pump duct (32) and comprises a rotor hub (28) and a rotor collar (30) that extends from the rotor hub (28) in the radial direction and encircles it in an undulating manner, wherein the blocking device (50) comprises a plurality of blocking elements (52, 52a, 52b, 52c, 52d, 52e) which are configured to block the pump duct in the axial direction on both sides of the rotor collar, wherein each of the plurality of blocking elements (52, 52a, 52b, 52c, 52d, 52e) has a slot with a U-shaped sealing profile for abutting against the rotor collar, a sealing face for abutting against the rotor hub, and two contacting faces for abutting against a seat of the pump duct and/or against a contacting face of another blocking element (52, 52a, 52b, 52c, 52d, 52e) of the plurality of blocking elements (52, 52a, 52b, 52c, 52d, 52e). Pump (10) having a corresponding blocking device (50).