Wheel-rail relation simulation fatigue test device and method

Abstract

The invention discloses a wheel-rail relation simulation fatigue test device and method.The device comprises a basis platform arranged on the horizontal plane.A load box is connected to the upper portion of a loading frame fixedly installed on the basis platform in a sliding mode.A motor is installed on the basis platform and serves as a drive wheel to drive a crank to rotate.The crank is connected with a transmission mechanism.The transmission mechanism drives a simulation wheel to horizontally reciprocate on a steel rail test piece, the simulation wheel is connected with the load box through a load connecting rod, and horizontal reciprocation of the simulation wheel can drive the load box to vertically reciprocate through the load connecting rod, and therefore dynamic loads are applied to the steel rail test piece placed under the simulation wheel.The defects that in the prior art, cost is high, the maintenance cost is high, and consumed time is long are overcome, and the advantages of being low in cost, low in maintenance cost, short in consumed time and the like are achieved.

Description

technical field [0001] The invention relates to an indoor test device in the field of railways, in particular to a device and method for simulating a fatigue test using a wheel-rail relationship of a crank-link mechanism. Background technique [0002] Wheel-rail contact problem is an important problem in rail transit system. As an important part of the wheel-rail system, steel rail is the basis for the development of railway transportation. In recent years, with the high-speed and heavy-duty of railways, the problems of wheel-rail friction damage such as rail fatigue crack growth, wavy wear, peeling off blocks, crushing and fracture have become increasingly serious, which greatly increased the operation and maintenance costs of the line. Seriously affect the safety and comfort of train operation, causing huge loss of manpower and material resources. Therefore, it is of great practical and economic significance to study the influence of wheel-rail contact on rail fatigue da...

AI Technical Summary

Problems solved by technology

The disadvantage of these two experimental machines is that the wheels and rails are simulated by wheels, which cannot simulate the actual contact relationship between wheels and rails well.

The test rig is very expensive to build and maintain

[0009] It can be seen from the above several wheel-rail relationship test benches that the traditional wheel-rail relationship test bench mainly adopts the static loading method, which still has a gap compared with the actual rail stress, and there are high costs, large maintenance costs and time-consuming long-term defects

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