Method for measuring wear of railroad vehicle wheel flange

• US 10,352,831 B2
• Filed: 11/10/2015
• Issued: 07/16/2019
• Est. Priority Date: 11/11/2014
• Status: Active Grant

• Current Assignee: Nippon Steel Corporation
• Original Assignee: Nippon Steel & Sumitomo Metal Corporation (Nippon Steel Corporation)
• Inventors: Kondo, Osamu, Shimokawa, Yoshiyuki
• Primary Examiner(s): Williams, Jamel E
• Application Number:
  US15/525,080
• Publication Number:
  US 20170336293A1
• Time in Patent Office: 1,344 Days
• CPC Class Codes: B61K 9/12 Measuring or surveying wheel-rims measuring techniques G01
• CPC Class Codes: B61L 27/57 for vehicles or trains, e.g. trackside supervision of train conditions
• CPC Class Codes: G01B 21/02 for measuring length, width, or thickness G01B21/10 takes precedence
• CPC Class Codes: G01M 17/10 Suspensions, axles or wheels

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.

Claims

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 in comparison to a previous measurement of the measured distance by subtracting the measured distance from the previous measurement of the measured distance.

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.

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.