Bearing White Structure Flaking Evaluation via Hydrogen Measurement
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Solution Overview
Problem
Existing methods for predicting white structure flaking in bearings require large evacuation devices and simulate conditions that differ from industrial use, making them inaccurate and time-consuming.
Innovation Solution
A method and device that measure hydrogen gas generation under conditions simulating industrial use, using a hermetically sealed container with rotating sliding members and hydrogen measurement means to evaluate white structure flaking possibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a device for evacuating the diffusible hydrogen detection chamber is used to discharge and detect diffusible hydrogen, then hydrogen detection is enabled, but the device becomes larger in scale
Solution Approach 1:
The patent extracts the evacuation device from the detection chamber system, performing hydrogen detection in atmospheric pressure without requiring vacuum evacuation. This removes the complex vacuum pump and evacuation mechanisms while maintaining hydrogen detection capability through direct measurement of hydrogen generated during sliding contact.
Solution Approach 2:
The patent changes the operating pressure parameter from vacuum (evacuated state) to atmospheric pressure. This parameter change eliminates the need for evacuation equipment while enabling hydrogen detection through measurement of hydrogen gas generated during the sliding test in atmospheric conditions.
2Device complexity
If evaluation is performed under pure sliding condition in vacuum environment, then hydrogen detection is simplified, but it does not completely simulate actual use condition of rolling device
Solution Approach 1:
The patent transitions from static vacuum evaluation to dynamic atmospheric evaluation, where sliding members operate in atmospheric pressure with lubricant, dynamically generating hydrogen that is directly measured. This dynamic approach better simulates actual bearing operation conditions while maintaining evaluation simplicity.
Solution Approach 2:
The patent changes the environmental parameters from vacuum to atmospheric pressure and introduces lubricant into the system. These parameter changes enable the evaluation to simulate actual use conditions where bearings operate with lubricant in atmospheric environment, improving reliability of the simulation.
3Reliability
If non-diffusible hydrogen amount is measured after test to predict white structure flaking, then prediction capability is achieved, but it takes a long time for hydrogen to be trapped as non-diffusible hydrogen
Solution Approach 1:
The patent performs preliminary action by directly measuring hydrogen generation during the sliding test process itself, rather than waiting for hydrogen to diffuse and become trapped. The hydrogen measurement means detects hydrogen as it is generated, providing timely prediction data without the time delay associated with hydrogen trapping and subsequent measurement.
Solution Approach 2:
The patent replaces the mechanical/diffusion-based hydrogen trapping process with a direct detection system. Instead of relying on hydrogen diffusion into the material and subsequent measurement of trapped hydrogen, the system directly measures hydrogen generation during sliding, eliminating the time-consuming diffusion process.
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
Enables rapid and accurate prediction of white structure flaking by measuring hydrogen gas under realistic conditions, without the need for evacuation devices, and provides a versatile measurement device for various industrial applications.
Implementation Method 1
sliding members slidably coming into contact with each other
Implementation Method 2
sliding members slidably coming into contact with each other
Implementation Method 3
hermetically sealed container having the sliding members housed inside
Data Source
AI summary
An object is to provide an evaluation method for detecting the amount of hydrogen supposed to influence white structure flaking in a simple manner in a short period of time and evaluating possibility of white structure flaking from the detected hydrogen amount. The provided is a possibility evaluation method of white structure flaking that, by measuring an amount of hydrogen gas generated under a condition simulating a use condition of a rolling device used in industrial equipment and existing in an atmosphere, evaluates possibility of white structure flaking in the rolling device.