High-speed heavy-duty train wheel-rail surface friction and wear and rolling contact fatigue test device

Abstract

The invention provides a high-speed heavy-duty train wheel-rail surface friction wear and rolling contact fatigue test device, which includes a reaction force support, a hydraulic loading device, a power supply connection device, a load frame, a transmission component, a rail, a simulated spring bar and a simulated sleeper , the simulated load is applied to the load frame through the hydraulic loading device, and then the simulated load is applied to the wheel by the load frame, and the driving force of the motor acts on the wheel after the torque is amplified by the transmission component, and the wheel is driven to roll on the circular track to realize the circle of the wheel set sports. The invention can independently control some factors in the running process of the wheel and rail. The load is applied by the hydraulic loading device. The hydraulic loading system can simulate a relatively large load. The position where the load force acts is the outer side of the wheel on the shaft. The invention can obtain relatively accurate data related to wheel-rail surface friction and wear and rolling contact fatigue of high-speed and heavy-duty trains, and provides more reliable data for wheel-rail design, manufacture and maintenance and wheel-rail damage prediction.

Description

technical field [0001] The invention relates to the field of fatigue tests, in particular to a device for testing wheel-rail surface friction and wear and rolling contact fatigue of high-speed and heavy-duty trains. Background technique [0002] In the process of our country's rapid development, due to our country's vast territory, railway transportation has played an indispensable role. Both railway freight and passenger transportation have been widely praised for their low cost and high efficiency, and are increasingly favored by people. Train traction, running and braking must be realized through the rolling friction contact between the wheel and rail. The wheel-rail system is a key component of railway transportation. A lot of manpower and financial resources have been invested in the research of the wheel-rail relationship. [0003] As an important load-bearing component during train operation, wheelsets are subjected to various complex loads and the influence of work...

AI Technical Summary

Problems solved by technology

There are problems in this way: the size of the wheels, axles, and hubs has changed, which is different from the real size, which may increase the experimental error

And the wheel-rail load is equivalent to the rolling contact between the wheel and the rail shaft wheel, which has a large gap with the real wheel-rail contact. When considering the small deformation under a large load, the deformation of the two contact methods is different, which increases the test The measured error of wheel-rail contact mechanical behavior and wheel-rail damage is poor in reliability

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