Prevention of Roller Bearing-Initiated Burnoffs in Railroad Freight Car Journals

Allen, G. E.; Lucas, J. R.; Tomlinson, F. H.; John A. Volpe National Transportation Systems Center, (U.S.)

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Prevention of Roller Bearing-Initiated Burnoffs in Railroad Freight Car Journals

1979-01-01
By Allen, G. E. ; Lucas, J. R. ; Tomlinson, F. H.

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English

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Details:

Creators:

Allen, G. E. ; Lucas, J. R. ; Tomlinson, F. H.

Allen, G. E. ; Lucas, J. R. ; Tomlinson, F. H. Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center, (U.S.)
Corporate Contributors:

United States. Federal Railroad Administration. Office of Research and Development
Subject/TRT Terms:

[+]

Axles High Temperature Hot Box Detectors Journal Bearings Journal Boxes Lubrication Mechanical Failure Radio Transmitters Roller Bearings Sensors Ultrasonic Tests Warning Devices
Publication/ Report Number:

FRA/ORD-78-16 ; DOT-TSC-FRA-79-5

FRA/ORD-78-16 ; DOT-TSC-FRA-79-5 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Railroad Administration
NTL Classification:

AGR-INFRASTRUCTURE-Railroads;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-SAFETY AND SECURITY-Vehicle Design;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Rail Safety;
Abstract:

The objective of this program was to determine the technical feasibility and cost effectiveness of constructing three separate devices for the prevention of catastrophic roller bearing-initiated, railroad journal failure. 1. Construction of a low cost axle cap bolt which would replace one of the three bolts in a standard bearing assembly, and which would contain a self-powered, maintenance free transmitter to signal a train crew in the event of roller bearing overtemperature, was proven feasible. This is technically and economically superior to current wayside temperature sensing devices, and has the capability of preventing burnoffs associated with bearing failure by any mechanism. 2. The prevention of bearing overlubrication by use of automated ultrasonic test methods was seen to be feasible. Use of such a device in a railroad repair track would prevent regreasing a freshly greased bearing and thereby save the costs of setouts and derailments caused by overlubrication. 3. The early detection of bearing component damage (spalling, brinelling, and particulate contamination) by use of "Shock Pulse Analysis" techniques was also seen to be feasible. Use of an automated device in a railroad wheel shop could save the costs of burnoffs associated with progressive damage, and also of investigative bearing teardown as a result of derailment.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:1d7a43324e1294c3999c42327be43b00298c9d7d70d4ad5ae328c210090aa229
Download URL:

https://rosap.ntl.bts.gov/view/dot/11641/dot_11641_DS1.pdf
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Prevention of Roller Bearing-Initiated Burnoffs in Railroad Freight Car Journals

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