|Table of Contents|

Operation performance prediction of C80 railway freight car braking device(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2021年06期
Page:
289-297
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Operation performance prediction of C80 railway freight car braking device
Author(s):
LU Bi-hong XU Chao GUO Hong-yuan
(School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China)
Keywords:
vehicle engineering railway freight car braking device performance prediction multi-body dynamics RecurDyn
PACS:
U270.1
DOI:
10.19818/j.cnki.1671-1637.2021.06.023
Abstract:
Based on a combination of field tests and multi-body dynamics simulations, a set of modeling and model verification methods reflecting the actual contact state of a C80 unit braking device weredeveloped, the RecurDyn simulation analysis platform was used, and the operation performance of the braking device was analyzed and predicted using the simulation analysis and experimental methods. Research results show that the contact stress on the side near the flange of brake-shoe is high, and the stresses on the lower parts of brake-shoes 2 and 3 are high, causing a significant eccentric wear of the brake-shoe. High stress exists at the braking beam-column connection, and the maximum instantaneous contact stresses of the connection parts of the floating and fixed levers are 137 and 127 MPa, respectively. The forces on pin shafts No.12 and 15 in the C80 unit braking device are the highest. When applying brakes for empty and heavy vehicles, the combined forces on the pin shafts exceed 10 and 50 kN, respectively. During on-site maintenance, the inspection of floating lever, middle tie rod, fixed lever, braking beam-column, vertical braking lever, and their connection parts should be conducted. During dynamic operation, the braking beam moves in the reverse direction toward the vehicle, causing abnormal intermittent collision and contact between the brake-shoe and the wheel. The contact force of the wheel shoe increases with the increasing running speed, resulting in the abnormal wear of the wheel and the eccentric wear of the brake-shoe. This research proposes a new technique for predicting the operation rule and performance of railway freight car braking devices and other complex mechanisms. The proposed method can be applied in the formulation and design improvement of C80 and other braking devices of railway freight cars. 2 tabs, 13 figs, 29 refs.

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Last Update: 2021-12-20