Transmission Output Shaft Sealing Array for Fast Exchange
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Solution Overview
Problem
Existing sealing technologies for transmission output shafts are complex to produce and maintain, requiring intricate assembly and lacking efficient methods for reducing pressure differential exposure.
Innovation Solution
A pre-assembled sealing array comprising a spacer ring and two shaft-sealing rings, connected via a flange part and coupling flange, which can be easily exchanged by replacing the flange part, incorporating a pressurized-air seal and grease chamber for enhanced protection and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional sealing array is used for the transmission output shaft, then the sealing function is provided, but the production and maintenance are complex and time-consuming
Solution Approach 1:
The sealing array is divided into modular components including a flange part with integrated sealing elements, a coupling flange, and separable shaft-sealing rings. This segmentation allows each component to be manufactured independently and assembled systematically, reducing overall production complexity while maintaining sealing functionality.
Solution Approach 2:
The flange part is pre-assembled with the first and second shaft-sealing rings and the spacer ring before installation into the transmission. This preliminary assembly simplifies the final installation process and reduces maintenance time, as the entire sealing array can be pre-tested and prepared offline.
2Ease of repair
If a traditional sealing array is used, then sealing is provided, but maintenance and exchange are complicated
Solution Approach 1:
The sealing array is designed with separable components where the flange part can be removed as a unit from the transmission housing. This segmentation enables rapid exchange during maintenance without requiring disassembly of the entire transmission system, significantly reducing maintenance time.
Solution Approach 2:
The flange part combines multiple functions including structural support, sealing element mounting, and pressure differential management into a single integrated component. This merging allows the entire sealing assembly to be exchanged as one unit, simplifying maintenance procedures.
3Object-affected harmful factors
If a single sealing ring is used, then simple structure is maintained, but pressure differential exposure is high
Solution Approach 1:
The sealing array employs a nested configuration where the first shaft-sealing ring and second shaft-sealing ring are positioned in series along the shaft, with the spacer ring separating them. This nested arrangement creates multiple sealing stages that progressively reduce pressure differential exposure while maintaining a compact structure.
Solution Approach 2:
The sealing solution transitions from a single radial sealing point to a multi-stage axial sealing arrangement. By distributing sealing functions across multiple rings positioned at different axial locations, the system reduces pressure differential exposure through staged pressure reduction rather than relying on a single sealing element.
4Ease of manufacture
If components are assembled separately in the transmission, then flexibility is maintained, but assembly complexity increases
Solution Approach 1:
The flange part, spacer ring, and shaft-sealing rings are pre-assembled into a complete sealing array unit before installation into the transmission. This preliminary assembly reduces the number of discrete assembly steps required during transmission assembly, simplifying the overall manufacturing process while maintaining component flexibility.
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
Facilitates rapid and simple production and maintenance of the sealing array, achieving high tightness and protection by reducing pressure differential exposure through a cascading sealing mechanism and pressurized-air seal.
Implementation Method 1
The space region delimited by the flange part, the coupling flange, the second shaft-sealing ring as well as the cylinder liner and/or the shaft may be acted upon by pressurized air
Data Source
AI summary
In a sealing array for a transmission, in particular for the output shaft of a transmission, and a transmission having a sealing array, a spacer ring is situated between a first and a second shaft-sealing ring, a flange part is connected to the coupling flange, in particular by screws, and a coupling flange presses the second shaft-sealing ring against the spacer ring, the spacer ring presses on the first shaft-sealing ring so that the first shaft-sealing ring is positioned against a flange part. The flange part, the coupling flange, the first shaft-sealing ring, the spacer ring, and the second shaft-sealing ring are arranged as a pre-assembled unit, and thus, in particular, as a transportable, integrated unit.