Axially Shiftable Rotary Element Support for Eccentric Bearing Loads
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Solution Overview
Problem
Conventional bearing concepts for rotatably mounted wearing discs in metal strip guidance systems are inadequate in handling eccentric axial forces, leading to increased wear and limited bearing life under spatial constraints.
Innovation Solution
A device with a housing and a rotary element that can be rotated and axially shifted, featuring support faces to limit axial shiftability and distribute loads, thereby reducing the burden on bearings and allowing for smaller bearing structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bearing concepts are used for rotatably mounted wearing discs, then the rotary element can be supported, but the bearing loads increase and bearing life is limited under eccentric axial forces
Solution Approach 1:
A support face is introduced as an intermediary element between the rotary element and the housing. This support face directly receives and transfers the eccentric axial forces and tilt moments to the housing, bypassing the bearings. The support face acts as a mediator that protects the bearings from these damaging forces, thereby extending bearing life while reducing bearing loads.
2Force
If larger bearings are used to handle eccentric axial forces, then bearing capacity increases, but the device size and spatial constraints are violated
Solution Approach 1:
The support face serves as an intermediary force transfer mechanism that enables small bearings to handle large eccentric axial forces. By directing these forces through the support face to the housing, the system achieves high bearing capacity without requiring oversized bearings, thus maintaining compact device dimensions and satisfying spatial constraints.
3Force
If the rotary element is fixed axially, then bearing loads are reduced, but the rotary element cannot accommodate axial shifts and tilt moments
Solution Approach 1:
The system transitions from a static fixed axial position to a dynamic configuration where the rotary element can axially shift. The support face is positioned to engage only when axial forces are present, allowing the rotary element to move freely in the axial direction during normal operation while providing support when needed. This dynamic behavior reduces bearing loads while maintaining axial shift capability.
Solution Approach 2:
The support face acts as a conditional intermediary that engages only under specific conditions (when axial forces act on the rotary element). During normal operation without axial forces, the rotary element can shift axially without constraint. When axial forces are applied, the support face engages to transfer these forces to the housing, thereby reducing bearing loads while preserving axial shift adaptability.
Data Source
AI summary
A device having a housing (2) and a rotary element (4) mounted in the housing (2) such that it can be rotated and axially shifted (14). In order to reduce bearing loads in the rotary element (4), with eccentric loading of the rotary element (4), the device provides at least one first support surface (6) on an end side (8) of the rotary element (4) and a second support surface (10) axially, opposite (40) the first support surface (6) on the housing (2). The rotary element (4) is then mounted in the housing (2) in such a way that, with the impact of an axial force (12) on the rotary element (4), the axial shiftability (14) of the rotary element (4) is limited by the support (16) of the first support surface (6) on the second support surface (10).