Portable wheel-rail lateral force calibration device

Abstract

The invention relates to a portable wheel-rail lateral force calibration device. The portable wheel-rail lateral force calibration device comprises an auxiliary rail clamping head (2), a main rail clamping head (15), a integral type support rod and a measuring assembly, wherein the auxiliary rail clamping head (2) and the main rail clamping head (15) are in contact with steel rails, the integral type support rod is overlapped with the middle of the auxiliary rail clamping head (2) and the main rail clamping head (15), and the measuring assembly is arranged on the integral type support rod. Theintegral type support rod comprises a left connecting rod (5), an intermediate thread casing (6), a right connecting rod (7), a knuckle bearing (8) and a bearing pedestal (10). The intermediate thread casing (6) is rotated to apply lateral force to the steel rails at the two ends, and the lateral force is measured and recorded by the measuring assembly. Compared with the prior art, a manual solidwrench can be used to rotate the intermediate thread casing, rotary motion pushes a guiding shaft in the axial direction under the action of the right connecting rod, the knuckle bearing and a thrustbearing, a digital display pressure sensor records a wheel-rail lateral force value under the action of axial force to be correspondingly matched with a steel rail plying-up strain value, the calibration precision is high, and the portable wheel-rail lateral force calibration device is detachable, easy to carry, and simple and convenient to use.

Description

technical field [0001] The invention relates to the technical field of railway engineering testing, in particular to a portable wheel-rail lateral force calibration device. Background technique [0002] With the rapid development of high-speed trains in my country, railway transportation continues to develop in the direction of high speed, heavy load, large capacity and high density, which puts forward higher requirements for the safety of train operation. Therefore, it is necessary to monitor and test the operating status of the track structure , especially curved track lines, to ensure the safety of train driving. Among them, the wheel-rail force test of the track structure is of great significance to ensure the safety of train running in the operation of railway vehicles. It is an important parameter for calculating safety indicators such as train derailment coefficient and wheel load reduction rate. Whether it can be accurately detected The wheel-rail force will be direc...

AI Technical Summary

Problems solved by technology

In the wheel-rail force test, whether the wheel-rail force can be calibrated accurately will be directly related to the test results of the wheel-rail force, thus affecting the judgment and evaluation of the safety of train operation

One of the existing wheel-rail force calibration devices is a dual-purpose device that can load vertical force and lateral force. This device has a better loading effect on vertical force, but when loading lateral force, it acts on one side of the rail. Not only does it not meet the requirements of the wheel-rail force measurement standard, but it is also easy to cause a rolling force on the rail, which affects the accuracy of the calibration value of the wheel-rail lateral force

The existing equipment is a dual-purpose device (vertical and horizontal), so there are many parts, and multiple people are required to cooperate with the assembly during the on-site test. During the repeated pressurization and depressurization process, personnel are required to lift the calibration frame, and the operation is complicated. , the efficiency is low, and the general wheel-rail force calibration device is an additional hydraulic device to load the rail, which will make the whole device relatively cumbersome

If the measurement location is in a tunnel or a bridge, the entire device cannot be transported to the measurement point by vehicle, and can only be carried by hand, which increases the workload of the testers

There is also a calibration device that only loads the lateral force, but this device is usually an integrated structure. The loading force is measured according to the manual pressure value of the axial hydraulic piston. The accuracy of the calibration value is poor, and the device is not easy to carry, and the calibration efficiency is low.

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