Parallel Shaft Sealing Unit Segmented Cartridge Maintenance
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Solution Overview
Problem
Existing sealing and bearing units for parallel shafts are complex and time-consuming to maintain and repair, requiring the removal of entire sealing arrangements, which is impractical due to their mass and complexity.
Innovation Solution
A simplified sealing and bearing unit with a one-piece housing that allows independent removal and replacement of bearings and sealing components, using press fits and retaining rings for easy access and maintenance, and a closure element to prevent contamination and unintentional release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bearing structure and slip-ring seal are jointly combined in a sealing arrangement, then the sealing function is provided, but the maintenance and repair become complex and time-consuming due to the need to remove the entire sealing arrangement
Solution Approach 1:
The sealing arrangement is divided into separate modular components: a bearing cartridge containing the bearing and a seal cartridge containing the slip-ring seal. Each cartridge can be independently removed and replaced without affecting the other components, transforming the previously integrated structure into separable modules that simplify maintenance operations.
Solution Approach 2:
The seal cartridge is extracted as a separate removable component from the bearing structure. This allows the seal to be independently accessed and replaced without removing the bearing or the entire sealing arrangement, enabling targeted maintenance of only the worn seal component.
2Reliability
If the bearing structure and slip-ring seal are jointly combined in a sealing arrangement, then the sealing function is provided, but the removal becomes impossible or difficult due to the great mass of the entire arrangement
Solution Approach 1:
The heavy integrated sealing arrangement is segmented into lighter separate cartridges. The bearing cartridge and seal cartridge can be individually removed from the housing, reducing the mass that needs to be handled during maintenance and making removal operations feasible for personnel.
Solution Approach 2:
The seal cartridge is extracted as a separate lightweight component that can be independently removed from the housing without requiring removal of the bearing structure or other heavy components, significantly reducing the effort and equipment needed for maintenance.
3Ease of repair
If the entire sealing arrangement is removed for component replacement, then the components can be replaced, but the process is accompanied by complexity with high time consumption
Solution Approach 1:
The sealing system is segmented into independent bearing and seal cartridges that can be replaced separately. This allows maintenance personnel to replace only the specific worn component (either bearing or seal) without disturbing other parts, dramatically reducing maintenance time compared to replacing the entire integrated arrangement.
Solution Approach 2:
The seal cartridge is extracted as a standalone replaceable unit that can be quickly swapped out without affecting the bearing or other components. This extraction approach enables rapid seal replacement independent of the bearing status, reducing overall maintenance downtime.
Data Source
AI summary
A sealing and bearing unit for at least two shafts orientated in parallel with one another is disclosed. The sealing and bearing unit includes a housing preferably constituted in one piece with at least two openings for the at least two shafts orientated in parallel with one another. There are assigned to each opening at least one bearing for the rotational holding of the respective shaft in the housing and at least one seal interposed between the housing and the respective shaft. Furthermore, there is assigned in each case to the respective at least one bearing and to the respective at least one seal at least one individual fixing for their independent connection to the housing.