Method for measuring wear of railroad vehicle wheel flange

Patent metadata

Field	Value
Publication number	US-2017336293-A1
Application number	US-201515525080-A
Country	US
Kind code	A1
Filing date	Nov 10, 2015
Priority date	Nov 11, 2014
Publication date	Nov 23, 2017
Grant date	—

Abstract

An amount of wear of a railroad vehicle wheel flange online while traveling in a curved section is directly measured. A laser rangefinder 3 is installed on an outer track side in a rounded curve section of a railroad track. When a railroad vehicle travels through the rounded curve section, the laser rangefinder 3 measures a distance to a front rim surface of a wheel on an outer track side of a wheelset in a forward direction of travel of a bogie forming a vehicle. The amount of wheel flange wear is obtained by comparing this measured distance with a previous measurement of the measured distance. It is then possible to control the amount of wheel flange wear when traveling in a curved section, thus making it possible to quickly find wheels having flange wear that has exceeded a control range and ensure safety during travel of the railroad vehicle.

First claim

1 . A method for measuring wear of a railroad vehicle wheel flange comprising:
installing a laser rangefinder on an outer track side of a rounded curve section in a railroad track; measuring a distance to a front rim surface of a wheel on the outer track side at a wheelset in a forward direction of travel of a bogie forming a vehicle, using the laser rangefinder while the vehicle is traveling through the rounded curve section; and determining an amount of wear of the railroad vehicle wheel flange by comparing the measured distance with a previous measurement of the measured distance.

2 . A method for measuring wear of a railroad vehicle wheel flange comprising:
installing a laser rangefinder on an outer track side of a rounded curve section in a railroad track; using the laser rangefinder to measure in advance a distance to a front rim surface of a wheel on an outer track side at a wheelset in a forward direction of travel of a bogie forming the vehicle when the railroad vehicle passes through the rounded curve section, the vehicle having mounted on it a wheel that has not yet been used or a wheel immediately after being milled so that the tread or flange will have a normal shape; and using the laser rangefinder to measure a distance to a front rim surface of a vehicle of a wheel on an outer track side at a wheelset in a forward direction of travel of a bogie forming the vehicle when the railroad vehicle passes through the rounded curve section, and then subtracting that distance from the measured distance to the front rim surface of a wheel that has not yet been used or a wheel immediately after being milled, so as to obtain the amount of flange wear of a wheel that has not yet been used or a wheel immediately after being milled.

3 . The method for measuring wear of a railroad vehicle wheel flange according to claim 1 , wherein laser rangefinders are installed in four locations where curvatures in the rounded curve section are the inverse of each other, and these laser rangefinders are used to measure the distance to the front rim surface of a wheel on the outer track side at a wheelset in a forward direction of travel in a two axle bogie while traveling through the rounded curve section.

Assignees

• Nippon Steel & Sumitomo Metal Corp

Inventors

• Kondo Osamu
• Shimokawa Yoshiyuki

Classifications

• G01M17/10 Primary

  Suspensions, axles or wheels · CPC title

• G01B21/02

  for measuring length, width, or thickness (G01B21/10 takes precedence) · CPC title

• B61K9/12 Primary

  Measuring or surveying wheel-rims · CPC title

• B61L27/57

  for vehicles or trains, e.g. trackside supervision of train conditions · CPC title