Rolling Bearing Test Device with Dual Load Mechanisms
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rolling bearing test devices struggle to accurately reproduce the complex load conditions encountered in actual use environments, which are often multi-directional, limiting the accuracy of testing.
Innovation Solution
A rolling bearing test device with a hermetic container, rotary shaft, shaft support portions, drive device, and dual load application mechanisms (axial and radial) that allow for simultaneous application of loads in a controlled atmosphere, mimicking real-world conditions using a non-contact power transmission and bellows for sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single load application mechanism is used, then the device complexity is reduced, but the ability to reproduce actual use load conditions is insufficient
Solution Approach 1:
The load application system is divided into two independent mechanisms: a first load application mechanism for applying axial loads and a second load application mechanism for applying radial loads. Each mechanism can be independently controlled and adjusted, allowing separate optimization of each loading function while maintaining the ability to reproduce complex multi-directional load conditions.
Solution Approach 2:
The test device is designed with multi-functional capabilities to apply both axial and radial loads simultaneously or independently through the two load application mechanisms. This universal design allows the device to reproduce various actual use load conditions that involve combined loading, making it adaptable to different testing scenarios and bearing types.
2Device complexity
If the drive device is placed inside the hermetic container, then the structure is simplified, but the sealing performance deteriorates
Solution Approach 1:
The drive device is extracted from the hermetic container and placed in the external environment. This separation removes the source of potential contamination and mechanical complexity from inside the sealed environment, thereby improving sealing performance while the driven components remain inside the hermetic container for testing purposes.
Solution Approach 2:
A non-contact coupling mechanism serves as an intermediary to transmit drive power from the external drive device to the rotary shaft inside the hermetic container. This intermediary transmission method avoids direct mechanical connection that would compromise the seal, while still enabling effective power transfer for rotating the bearing during testing.
3Measurement precision
If multiple load application mechanisms are added, then the testing accuracy is improved, but the device complexity increases
Solution Approach 1:
The testing system is segmented into distinct functional modules: axial load application, radial load application, and rotational drive. Each module is independently designed and controlled, allowing precise measurement and control of each load component separately, which improves overall testing accuracy while making the complexity manageable through modular design.
Solution Approach 2:
The load application mechanisms are designed to be dynamically adjustable, allowing the magnitude and direction of applied loads to be varied during testing. This dynamic capability enables accurate reproduction of real-world operating conditions where loads change over time, improving testing relevance without requiring overly complex fixed mechanisms.
Data Source
AI summary
A rolling bearing test includes: a hermetic container configured to allow atmosphere gas to be introduced therein; a rotary shaft housed in the hermetic container and fitted into the rolling bearing; a pair of shaft support portions fixed to a fixing portion provided in the hermetic container and configured to rotatably support the rotary shaft at both sides of the rolling bearing in an axial direction, respectively; a drive device configured to drive the rotary shaft; a holding portion configured to hold the outer ring of the rolling bearing to avoid rotation of the outer ring; a first load application mechanism configured to apply an axial load between the inner ring and the outer ring of the rolling bearing; and a second load application mechanism.