Motive power machine closed loop inclinable polygonal excitation gear box testbed

Abstract

The invention relates to a motive power machine closed loop inclinable polygonal excitation gear box testbed. The testbed comprises a vibration isolation T-shaped cast iron foundation platform, a gear box testbed body fixed to the vibration isolation T-shaped cast iron foundation platform and a refrigeration circulation system connected with the gear box testbed body, a cylindrical tooth gear is adopted to simulate the contact surface of a wheel track, vertical excitation and axial excitation are utilized, and the vibration situation of a gear box of a high speed train in the actual running process is simulated actually; mechanical torques different in intensity are generated inside a closed loop system through engagement position changes of a large inclined gear and a small inclined gear, so that energy consumption is reduced. An inclinable mounting base beam can generate certain inclination in the axial direction and the radial direction, and whether the gear box can guarantee normal circular flow and leakproofness of lubricating oil in the box or not in the operation process of the train is detected. By means of the testbed, comprehensive reliability tests can be conducted on the gear box of the high speed train, a good promotion effect is achieved for improving safety running of the train and improving sitting comfort of a high speed motor train unit, and good social and economic benefits are achieved.

Description

technical field [0001] The invention relates to a test platform for detecting parameters of a rail vehicle transmission system, more specifically, the invention relates to a closed-loop tiltable polygonal excitation gearbox test platform for power machinery. Background technique [0002] At present, the development of high-speed train technology in my country is advancing by leaps and bounds. The maximum operating speed of the new generation of EMUs has reached 380km / h, and the maximum test speed of the newly developed EMUs is close to 600km / h. The increase of the speed of the train and the increase of the axle load of the vehicle intensifies the vibration between the wheel set and the track, and the gradual wear and tear of the wheel during the running process and the continuous impact with the rail cause the wheel rim to gradually change from a smooth, regular circle. Changes to an irregular polygonal shape with uneven surfaces. The uneven surface of the wheel rim will co...

AI Technical Summary

Problems solved by technology

The uneven surface of the wheel rim will continue to generate impact force during the running process and cause the vibration of the whole train. In addition, the high speed of the high-speed train will cause the vibration to be more severe, which will cause important parts such as axles, bearings, and gearboxes on the train. In severe cases, a resonance acceleration of 30g to 70g may be generated, resulting in more serious problems such as bearing rupture and gearbox shell fragmentation, which are directly related to the stability and safety of train operation.

[0003] Most of the existing detection methods for railway vehicle gearboxes are to set certain test conditions to analyze the reliability of the gearbox according to the damage mode of the existing gearbox. Due to the force and vibration in the direction, the fault may be the superposition of multiple failure modes, so the existing detection methods cannot truly reflect the cause of the fault of the gearbox in the actual operation of the rail vehicle

The gearbox reliability test is a destructive test. Only when the gearbox is subjected to fatigue damage under severe working conditions can the failure mode and cause be accurately diagnosed. sex test

At the same time, due to the speed increase of the EMU, the gearbox must also meet the reliability requirements under high-speed working conditions, which puts forward higher requirements for the power of the drive motor of the test bench. Most of the existing gearbox test benches are under development. The test in the ring state not only requires a relatively high-power drive motor, but also causes waste of energy during the test process.

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