With the blade type hydraulic loader, the test bench can not only achieve no-load start-up, but also stepless speed regulation, stepless loading, and arbitrary loading during operation. The frequency conversion motor directly drives the test gear box to run and control, and controls the frequency of the frequency conversion motor to control the speed of the entire integrated gear test bed. The pressure of the hydraulic system is adjusted by the pressure regulating valve of the hydraulic power system to control the torque of the torque loader.
The no-load running-in test carries out the no-load running test of each transmission gear box of the official product developed before the factory, and checks whether the lubricating oil path of the transmission gear box is unblocked, whether the sealing structure is reasonable, and the temperature rise of each bearing is investigated. Noise, whether the connectors and fasteners are loose, select the appropriate amount of lubricant through testing. For each test, the test oil volume of 16,14,12,10dm3 was used for positive, reverse running and overspeed test. The purpose was to test the influence of different oil quantity on the temperature rise and sealing of the box. Select the suitable lubricating oil for the quick freezing cold storage. the amount. The test speeds were 200, 250, and 270 km/h, respectively, and the heat balance test was performed. The test speed was 330km/h and 15min was run for the overspeed test.
Through the no-load running test, it can be known that the amount of oil added to the transmission gear box should not be too much, the amount of oil increases, the loss of the oil is increased, and the temperature of the lubricating oil rises. The oil loss in the high speed range is mainly the power consumed by the acceleration of the lubricating oil, and its magnitude increases as the number of revolutions increases. The loading test tests the newly developed high-speed, quasi-high-speed transmission gearbox prototype to simulate the actual operation and stress of the gear transmission. Comprehensive performance evaluation of the prototype under different torques and different speeds, evaluation of sealing performance, bearing lubrication effect and temperature rise, oil pool temperature rise, transmission efficiency. Through testing, the reliability of the transmission gearbox can be ensured to meet the safety of train operation. Complete the installation and commissioning of the load test.
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