Bearing Assembly Thermal Stress Reduction in Roller Oven
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Solution Overview
Problem
Existing systems for treating items, such as those used in photovoltaic thin-film cell production, face high wear and tear issues with support rollers and bearing devices, leading to increased downtimes and assembly complexities due to thermal stress and misalignment.
Innovation Solution
Incorporating a flexible compensating element between the bearing device and the housing, coupled with a sealing arrangement that separates the bearing device from the internal atmosphere, reduces thermal load and allows for easier assembly and disassembly, while compensating for wear and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the bearing device is directly fixed to the housing wall, then the structure is simpler and more stable, but the thermal stress on the bearing assembly increases and service life decreases
Solution Approach 1:
The bearing device is segmented from the housing wall through the introduction of a flexible compensating element. This allows the bearing assembly to be separated into an independent functional module that can move relative to the housing, reducing thermal stress while maintaining structural integrity through modular design.
Solution Approach 2:
A flexible compensating element is introduced as an intermediary between the bearing device and the housing wall. This compensating element absorbs thermal expansion and stress, acting as a mediator that protects the bearing assembly from direct thermal stress while maintaining the structural connection.
2Reliability
If the bearing device is decoupled from the housing wall using a flexible compensating element, then thermal stress is reduced and service life is increased, but the device complexity increases
Solution Approach 1:
A flexible compensating element, likely in the form of a flexible membrane or bellows structure, is used to decouple the bearing device from the housing wall. This flexible element provides the necessary compliance to reduce thermal stress while maintaining a relatively simple overall structure compared to rigid decoupling mechanisms.
3Productivity
If the carrying roller is firmly mounted in the bearing device, then the conveying function is more stable, but wear increases and replacement becomes more difficult
Solution Approach 1:
The carrying roller assembly is segmented into a modular unit that can be independently removed from the bearing device. This segmentation allows the roller to be firmly mounted during operation for stable conveying, while enabling easy removal and replacement when wear occurs, without affecting the bearing device itself.
4Manufacturing precision
If the housing wall is designed with precise alignment for the bearing passage, then the misalignment wear is reduced, but the manufacturing cost and complexity increase
Solution Approach 1:
The flexible compensating element changes the geometric parameters of the connection between the housing wall and bearing device. By introducing flexibility and compliance, the system can accommodate a range of alignment variations without requiring precise manufacturing tolerances, thereby reducing manufacturing cost and complexity while maintaining operational reliability.
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 configuration enhances the durability of bearing devices, reduces downtimes, and simplifies maintenance by decoupling the bearing device from the housing, ensuring a reliable seal even with misalignment, and protecting the bearing components from high temperatures.
Implementation Method 1
a flexible compensating element (78) is provided between at least one bearing device (66) and a wall (28) of the housing (14) associated with the bearing device (66); the compensating element (78) is pre-tensioned such that the sealing arrangement (95) is pressed in the direction of the at least one bearing device (66)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a system, for example designed as a roller oven, for treating a material, comprising a treatment chamber (16) equipped with a shell (20) that separates an atmosphere present inside the shell from an atmosphere present outside the shell (20), wherein the atmosphere present inside the shell (20) is a controlled atmosphere. A housing (14) delimits the treatment chamber (16). At least one support roller (24) for conveying the material is arranged at least partially within the treatment chamber (16). One or more bearing devices (64, 66) by means of which the at least one support roller (24) is mounted are arranged outside the housing (14).A flexible compensating element (76, 78) is provided between at least one bearing assembly (64, 66) and an associated wall of the housing (14), wherein a sealing arrangement (93, 95) is provided which is connected to the compensating element (76, 78) and separates the at least one bearing assembly (64, 66) from the atmosphere present within the shell (20). In this way, the load on the bearing assemblies (64, 66) can be reduced and their service life increased.