Integrated Multi-Stage Gerotor Rotor Body for Leak Sealing
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Solution Overview
Problem
Gerotor devices with multiple stages face challenges in cost-effectiveness and installation space efficiency, as well as reliability issues due to separate rotor production and assembly, leading to potential internal leakages and gas ingestion.
Innovation Solution
The design integrates a rotor body that serves as both the inner rotor of one gerotor stage and the outer rotor of another, sealing the stages against each other and the surrounding area, eliminating the need for separate rotor production and assembly, and utilizing a housing with grooves and ribs for sealing to prevent leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate rotors are produced and assembled for each gerotor stage, then the gerotor device can be manufactured with standard production processes, but the production cost increases and assembly complexity increases
Solution Approach 1:
The patent merges the inner rotor of the first gerotor stage and the outer rotor of the second gerotor stage into a single integrated rotor body. This consolidation eliminates the need for separate production and assembly of these components, directly reducing production costs and assembly complexity while maintaining the functional requirements of both gerotor stages.
Solution Approach 2:
The integrated rotor body serves multiple functions simultaneously: it acts as the inner rotor for the first gerotor stage and the outer rotor for the second gerotor stage. This multi-functionality reduces the total number of components needed and simplifies both manufacturing and assembly processes.
2Ease of manufacture
If separate rotors are assembled for each gerotor stage, then production flexibility is maintained, but installation space increases and assembly time increases
Solution Approach 1:
By combining multiple rotor functions into a single integrated rotor body, the patent reduces the overall volume occupied by rotating components in the gerotor device, thereby saving installation space while maintaining production flexibility through the modular gerotor stage design.
3Ease of manufacture
If gerotor stages are not sealed against each other, then manufacturing is simpler, but internal leakages occur and reliability decreases
Solution Approach 1:
The integration of the inner rotor of the first stage and the outer rotor of the second stage into a single rotor body creates inherent sealing between the gerotor stages. This merging eliminates potential leakage paths while maintaining manufacturing simplicity, as the seal is achieved through the integrated structure rather than additional sealing components.
4Reliability
If gerotor stages are sealed against each other, then internal leakages are prevented and reliability increases, but manufacturing complexity increases
Solution Approach 1:
The patent achieves sealing between gerotor stages by merging the rotor structures into a single integrated component. This approach increases reliability by preventing internal leakages while avoiding the need for complex additional sealing mechanisms, as the seal is inherent to the integrated design.
Data Source
AI summary
A gerotor device for a pump apparatus is disclosed. The gerotor device includes at least two gerotor stages that respectively include an inner rotor rotating during operation about an inner axis with teeth projecting radially outside, and an outer rotor rotating during operation about an outer axis radially offset relative to the inner axis with radially inner open tooth gaps, in which the teeth of the inner rotor engage. A rotor body rotating during operation about a rotor axis includes radially open tooth gaps of a first gerotor stage of the at least two gerotor stages and teeth projecting radially outside of a second gerotor stage of the at least two gerotor stages. The tooth gaps of the at least two gerotor stages are fluidically sealed at least one of against one another and relative to a surrounding area.