Wheel and axle physical fatigue testing machine
Wheel and axle physical fatigue testing machine
Wheel test bench
The test rig of full size axles (special equipment for testing the physical performance of the axles).
Comprehensive test system for various performance tests and fatigue tests on physical axles, wheels and wheelsets, brake discs to brake shoes and other components. The test bench system includes three test benches: axle fatigue test bench, braking performance test bench and wheel set test bench. Other parts of the test bench such as control system, hydraulic system, lubrication system, cooling system, high-speed air supply system, monitoring system, test system and data processing system are unified systems, which are controlled by the control room.
Axle Fatigue Test Bench This test stand is a cantilever type rotary bending fatigue test stand, which can perform rotary bending fatigue test on various physical axles. The test load is applied by the servo hydraulic system, which can apply a constant load or an alternating load.
Brake test rig This test rig can carry out emergency, common and ramp braking simulation tests on wheels and brake discs, so as to conduct experimental research on the thermal fatigue and thermal damage of wheels and brake discs under the action of brake thermal load To test the brake friction performance of brake shoes and brake pads, and test the emergency braking distance of locomotives. The inertia of the rolling stock under emergency braking is simulated by the inertial wheel.
Wheel set test bench The test bench can perform various performance tests on a single wheel set, such as wheel-rail relationship research, wheel set static strength test, bearing running-in and braking performance test. The tested wheel pair is driven by two track wheels, and the track wheels are driven by a DC motor. The vertical load of the tested wheel pair can be applied by the servo hydraulic system or by the weight.
It can test and process the test speed, brake shoe pressure, braking power, various loads, bearing temperature and other data in real time, and display and print out all the required data in real time. The monitoring system consists of industrial monitors to monitor the working state of the test bench.
The physical wheel and axle fatigue test bench is used for the fatigue test of wheels and axles. The structure of the test bench can be designed with reference to the drawings, and can also be designed by other test methods.
Overall requirements of test bench
☆ Scientific research capability of test bench: In addition to being able to carry out the fatigue performance tests of wheels and axles stipulated by the relevant standards, it is also possible to carry out studies on the fatigue of wheels and axles. ☆ Single piece test cost: The single piece test cost is one of the bid evaluation indicators. The bidder needs to calculate and provide the single piece test according to the loss rate of consumable parts caused by 200 kN · m load, 107 cycles and single piece test cost. ☆ Test method: rotating bending test
☆ Test frequency: The test frequency is not less than 50Hz.
☆ Strength requirements: Under the load conditions provided by the buyer, the test bench mechanical system has sufficient strength, rigidity and infinite life fatigue strength. ☆ Control mode: control the operation of the test bench through the computer closed-loop real-time control system, and display the complete information of the test bench running status. ☆ Dynamic response of mechanical structure: At the highest working frequency (at the highest speed), the dynamic response of the test equipment cannot damage the test equipment and cannot affect the accuracy of the test measurement data. ☆ Shutdown function: It has automatic shutdown and emergency shutdown functions, and the loading system can be automatically unloaded after shutdown. ☆ Safety protection requirements: complete safety protection structure, equipment and measures are designed to protect test personnel and test equipment, and the industrial protection level meets IP56.
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