Bearing Test Apparatus Low-Temperature Stability
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Solution Overview
Problem
Existing bearing test apparatuses are unable to stably perform tests on bearings at extremely low temperatures and often fail to protect components from such conditions, while also being overly complex due to the inclusion of a torquemeter.
Innovation Solution
A bearing test apparatus comprising a chamber, a rotatable part, a fixed part, a support bearing, a cooling fluid supply device, and a heating device connected to the support bearing, which allows for stable testing at low temperatures without a torquemeter, and includes a sealing member to prevent cooling fluid ingress and protect components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling fluid supply device is used to achieve low-temperature testing, then the ability to test bearings at extremely low temperatures is improved, but the complexity of the apparatus increases and components may be damaged by the cooling fluid
Solution Approach 1:
The apparatus is divided into distinct zones: a test chamber for low-temperature bearing testing and a separate support bearing region maintained at ambient temperature. This segmentation allows the cooling fluid to be confined to the test chamber, enabling low-temperature testing while protecting other components from damage and reducing overall system complexity.
2Measurement precision
If a torquemeter is included to measure torque, then measurement capability is improved, but the device complexity and cost increase
Solution Approach 1:
The torquemeter is completely removed from the apparatus. Instead of measuring torque directly, the invention uses the rotation motor's electrical parameters (current, voltage, power consumption) to indirectly assess bearing performance and detect abnormalities. This extraction of the torquemeter simplifies the device structure and reduces cost while maintaining measurement capability through alternative means.
Solution Approach 2:
The mechanical torque measurement system (torquemeter) is replaced with an electrical measurement system that monitors the rotation motor's electrical parameters. This substitution eliminates the need for mechanical torque sensing components, reducing device complexity while providing sufficient information for bearing performance evaluation.
3Reliability
If components are protected from cooling fluid, then reliability is improved, but the ability to maintain low-temperature environment is reduced
Solution Approach 1:
The apparatus uses spatial segmentation with a sealed test chamber that maintains the low-temperature environment for bearing testing while keeping the support bearing and other components in an ambient temperature zone. This segmentation allows simultaneous achievement of component protection and low-temperature maintenance in their respective zones.
Solution Approach 2:
A sealed chamber acts as an intermediary between the cooling fluid and the external environment. The chamber contains the cooling fluid and low-temperature conditions within its boundary, allowing the bearing to be tested in extreme cold while the support bearing and other components remain protected in the ambient temperature zone outside the chamber.
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
The apparatus enables stable testing of bearings at extremely low temperatures, protects components from damage, and simplifies equipment by omitting the torquemeter, thereby improving test reliability and reducing complexity.
Implementation Method 1
a heating device connected to the support bearing, wherein the heating device is configured to heat the support bearing
Implementation Method 2
a cooling fluid supply device configured to supply a cooling fluid into the chamber
Data Source
AI summary
Provided is a bearing test apparatus. The bearing test apparatus includes a chamber, a rotatable part of which a portion is inserted into the chamber, a fixed part configured to support the rotatable part, a support bearing inserted between the rotatable part and the fixed part to support rotation of the rotatable part, a cooling fluid supply device configured to supply a cooling fluid into the chamber, and a heating device connected to the support bearing. The heating device is configured to heat the support bearing.