With the change of the market, the railway industry develops faster and faster. At the same time, the railway industry also puts forward higher requirements for the quality and efficiency of railway vehicle maintenance. Therefore, in view of the actual situation of vehicle maintenance in the railway market, the Ministry of Railways of our country has reformed the system of vehicle maintenance in our country, extended the period of factory repair and depot repair, and shortened the time of vehicle maintenance. Therefore, how to improve the efficiency of maintenance work under the premise of ensuring the quality of railway vehicle maintenance. It has become the concern of many railway vehicle maintenance workers. This part introduces a new type of inspection tool for railway vehicle maintenance and its application in railway vehicle maintenance.
Application of industrial endoscope in vehicle maintenance and inspection
Industrial endoscope testing is different from other nondestructive testing methods in that it can directly reflect the internal and external surface conditions of the tested object, and does not need to judge the existence of defects through data comparison or the skills and experience of testing personnel. And at the same time, we can use the industrial endoscope equipment for dynamic video recording or photographic recording of the whole detection process, and can quantitatively analyze the defects found, and measure the length, area and other data of defects.
In general, industrial endoscope detection is widely used in the railway industry, involving the development, manufacturing, maintenance and repair of railway engineering vehicles and transport vehicles, and even in the process of railway infrastructure construction, such as the construction and maintenance of bridges and tunnels. So in the maintenance of railway vehicles, the main application of endoscope includes gearbox, hollow horizontal axle, motor, bogie side frame, bolster and shock spring, air conditioning and ventilation system inspection and other aspects.
With the use and operation of the locomotive, it is inevitable that the traction gearbox will have problems such as gear wear, bad occlusion, etc., and even lead to the scrapping and derailment of the gearbox. Using the industrial endoscope detection method, using its flexible guide insertion tube, through the oil quantity observation port of the gearbox, it enters into the gearbox to check the gear condition and whether there are foreign matters at the bottom of the gearbox. This kind of inspection method can intuitively show the internal situation of the gearbox, and through the image recording function of the industrial endoscope, we can take photos and archive the detected situation, and realize the remote diagnosis.
Inspection of traction motor
The traction motor is usually installed at the bottom of the locomotive, which not only starts and stops frequently, but also vibrates greatly in operation, and the installation space is narrow, and it also bears the invasion of sand, rain, snow and dust. The service conditions are very bad, so it is very easy to fail. Generally speaking, the main faults of the motor are motor ring fire (caused by motor oil or bad broken brush), insulation damage, bearing wear, winding group or lead wire, brush holder wire breakage. During depot repair, we need to completely dismantle and disassemble the motor to complete the inspection. However, after using the industrial endoscope, we can insert the industrial endoscope through the maintenance window or cooling hole for inspection to observe the oil stain, carbon deposit, bearing and lead condition inside the motor.
In addition to the above mentioned examination applications, industrial video endoscopy is also used in many examinations. For example, the inspection of the air conditioning and ventilation system of the carriage, the inspection of diesel internal combustion gearbox of maintenance locomotive, the inspection of door system of urban rail vehicles, the construction quality inspection and aging inspection of railway infrastructure projects such as tunnels and bridges, etc.
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