Hydraulic Rotary Feed-Through With Integrated Seals for Leakage Control
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Solution Overview
Problem
Hydraulic rotary feed-throughs in large ventilator wheels face significant leakage issues due to large seal areas, which are difficult to manage effectively, and existing designs aim to minimize construction volume and seal areas but struggle to reduce leakage further.
Innovation Solution
A hydraulic rotary feed-through design where the bearing and seal arrangements are integrated into axially engaged frames within a housing, forming a compact unit that reduces the size of the feed-through and seal areas, allowing for smaller structures and improved sealing, enabling the use in various applications including ventilator wheels and V-belt drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal area is increased to accommodate larger ventilator wheels, then the sealing capability is improved, but the leakage possibility increases
Solution Approach 1:
The seal arrangement is divided into multiple individual seals (first seal, second seal, third seal) arranged in series along the pressurized fluid line. This segmentation allows each seal to handle a portion of the sealing task, improving overall sealing reliability while maintaining manageable dimensions for each individual seal component.
Solution Approach 2:
The seal arrangement is nested within the bearing arrangement structure, with seals positioned in sequence along the fluid path. The first seal, second seal, and third seal are arranged concentrically and axially to create multiple sealing stages, effectively reducing leakage through nested sealing zones without requiring excessive radial or axial space.
2Volume of stationary object
If the construction volume is minimized, then the device size is reduced, but the seal arrangement becomes more difficult to design
Solution Approach 1:
The bearing arrangement and seal arrangement are merged into a single integrated structure. The seals are positioned within the bearing assembly, sharing common mounting surfaces and support structures. This combination reduces the overall construction volume while the systematic arrangement of multiple seals in sequence manages the complexity through standardized positioning and alignment features.
3Object-generated harmful factors
If the number of seal areas is reduced, then the leakage possibilities are reduced, but the sealing effectiveness decreases
Solution Approach 1:
The sealing system is segmented into three distinct seal positions (first seal, second seal, third seal) arranged in series along the fluid path. This segmentation creates multiple independent sealing zones that work together to prevent leakage, where each seal addresses specific leakage risks at different locations without requiring a single large seal area.
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
This design significantly reduces leakage by integrating the bearing and seal arrangements, allowing for smaller, more efficient hydraulic feed-throughs that can be easily accommodated in hub housings and used in various devices, including ventilator wheels and machine tools, with enhanced sealing and reduced leakage detection through optical features.
Implementation Method 1
a bearing arrangement (22) which supports the rotary feed-through (1) for rotation
Implementation Method 2
a pressurized fluid line (18) which extends through the rotary feed-through (1) to a pressure space
Data Source
AI summary
A hydraulic rotary feed-through with a neck which is accommodated in a housing via a bearing arrangement and through a pressurized fluid line extends to a pressure space with a seal arrangement provided axially between the pressure space and the bearing arrangement, the bearing arrangement and the seal arrangement are disposed in frames which are accommodated in the housing axially engaged with one another under pressure.