High-speed train transmission gear box body strength test method

Abstract

The invention discloses a high-speed train transmission gear box body strength test method. The method comprises the following steps of S1, carrying out gear box load test detection, namely installinga ferrule on an outer ring of a bearing in a gear box body, adhering a strain sensor and an acceleration sensor, and recording the detection data through gear box operation, and obtaining the dynamicload data of a gear box speed reducer and a gear. According to the invention, the ferrule is installed on the bearing outer ring in the gearbox body, the strain sensor and the acceleration sensor arebonded, a speed measurement sensor is installed or a vibration acceleration sensor is used in the gearbox body, a load test is started, and operation data is obtained according to the strain sensor and the acceleration sensor. Data facilitates the fatigue simulation analysis of the gear box, then sealing detection, corrosion detection and tensile strength detection are conducted, ultrasonic wavesin an ultrasonic flaw detector penetrate into the welding position or the metal material of the box body, and whether the material and the welding position of the box body have defects or not is detected.

Description

technical field [0001] The invention relates to the technical field of gearbox testing, in particular to a method for testing the strength of a transmission gearbox of a high-speed train. Background technique [0002] As we all know, the gearbox has a wide range of applications. Among them, the gearbox for high-speed trains is composed of gears, boxes, bearings and lubrication mechanisms. It is the power transmission device of high-speed trains and is responsible for transmitting the power of the motor to the train. , generally speaking, a gear with a linear speed exceeding 25 meters per second can be called a high-speed gearbox; when the train speed increases from 200 kilometers per hour to 380 kilometers per hour, the linear speed of the driven gear will jump from 35 meters per second to 70 meters; such a high speed poses great challenges to the performance of the gear itself, the meshing between the gears, and the reliable sealing of the box. It is far from the speed requ...

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Problems solved by technology

[0002] As we all know, the gearbox has a wide range of applications. Among them, the gearbox for high-speed trains is composed of gears, boxes, bearings and lubrication mechanisms. It is the power transmission device of high-speed trains and is responsible for transmitting the power of the motor to the train. , generally speaking, a gear with a linear speed exceeding 25 meters per second can be called a high-speed gearbox; when the train speed increases from 200 kilometers per hour to 380 kilometers per hour, the linear speed of the driven gear will jump from 35 meters per second to 70 meters; such a high speed poses great challenges to the performance of the gear itself, the meshing between the gears, and the reliable sealing of the box. It is far from the speed required by the generator for power generation. The speed-up effect of the gear pair is realized, so the gearbox is also called the speed-up box; the existing gearbox is relatively simple in the inspection process, and there is no uniform inspection standard after the gearbox is produced, which leads to the inspection personnel in the inspection A variety of detection devices or detection methods of different standards are used for materials. At the same time, the existing gearboxes are subjected to high frequency and high impact loads during operation, internal dynamic excitations caused by meshing impacts and error excitations, and may also be affected by unpredictable external forces. Acceleration shock excitation increases the probability of fatigue failure, so fatigue testing is required

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