Device and method to measure temperature during tribological examination of materials
Inventors
Sanchez, Carlos • MONEER, Michael • Lee, Peter
Assignees
Southwest Research Institute SwRI
Publication Number
US-11892361-B2
Publication Date
2024-02-06
Expiration Date
2041-12-15
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Abstract
A device and method for measuring temperature during tribological examination of sample materials. More specifically, the device includes a sample holder that provides for surface temperature measurement for sample materials undergoing tribological testing.
Core Innovation
The invention provides a device and method for measuring temperature during the tribological examination of sample materials, specifically through a sample holder designed to facilitate surface temperature measurement during tribological testing. The sample holder consists of a base portion with a recessed area for the placement of a test body and a hollow support with two inner diameters, one proximate to and smaller than the base and another distal and larger, which together are configured to contain and guide a thermocouple to engage with the test body.
The problem addressed by the invention is the lack of means in existing tribological test devices for measuring the temperature of sample materials during examination, especially at the surface where tribological interactions occur. Prior art focuses on improving vibration control, force application, and friction measurement but does not provide an effective solution for in-situ surface temperature monitoring during tribological tests.
The invention further refines the sample holder with features such as an elongated insert component situated between the base and hollow support, which securely holds the thermocouple during testing. The configuration allows the thermocouple to be positioned within the test body at a specified depth, enabling accurate and direct temperature measurement in proximity to the surface under tribological evaluation, which is crucial for obtaining more precise tribological data including friction and wear measurements.
Claims Coverage
There are two independent claims in this patent, each focused on inventive features of a temperature-measuring sample holder and a test device using the sample holder.
Sample holder with dual-diameter hollow support and thermocouple accommodation
The invention covers a sample holder for a tribological testing device, which includes: - A base portion with a recessed area for the placement of a test body. - A hollow support engaged to the base, having a first inner opening diameter (ID1) proximate the base and a second inner opening diameter (ID2) distal to the base, where ID1 < ID2. - Both diameters are configured to contain a thermocouple that extends into the base portion to engage the test body placed therein. - An elongated insert positioned between the base portion and the hollow support.
Test device with oscillating test body and temperature-measuring sample holder
The invention covers a test device for tribological examination of materials, comprising: - A first test body with a surface that is configured to be driven in an oscillating manner. - A second test body positioned in a sample holder that includes: - A base portion with a recessed area for the placement of the second test body. - A hollow support engaged to the base with a first inner opening diameter (ID1) proximate the base and a second inner opening diameter (ID2) distal to the base, where ID1 < ID2. - The hollow support includes an opening configured to contain a thermocouple that extends into the base portion to engage with the second test body placed therein. - An elongated insert positioned between the base portion and the hollow support.
The independent claims focus on a sample holder structurally optimized for precise placement and securement of a temperature sensor (thermocouple), and the integration of this holder into a tribological test device for accurate temperature measurement during oscillatory testing.
Stated Advantages
Provides relatively secure fitting of a thermocouple temperature sensor to a test body undergoing tribological evaluation.
Enables relatively more accurate tribological information by monitoring the temperature of the test body.
Allows more precise measurement of friction and wear between test bodies as well as evaluation of the effects of lubricants.
Documented Applications
Utility in a tribological testing apparatus such as the Optimol SRV® Basic Oscillation System to monitor temperature of the test body during examination of friction forces, friction coefficients, and total wear.
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