This spring, acceptance tests of a dump car (dump car) of model 33-7141 began - a sample of new products developed and manufactured by the Kryukov Carriage Works (KVSZ). And the other day they were continued in working conditions - on the tracks of the Poltava Mining and Processing Plant (GOK).
“At the plant, we tested a dump car in a busy mode. It was filled with crushed rock, which is much heavier than rubble or clay. Under such real production conditions, the dynamic, strength and braking characteristics of the prototype dump car were tested, ”said Vitaly Mikhailov, head of the electrical testing laboratory of the KVSZ design and design department.
Experts from the Research Institute of Carriage Building of the State Enterprise "UkrNIIV" took part in the tests at the GOK. They recorded the stress indicators on the car frame, folding sides, assemblies and fasteners during the movement of the dump car by industrial routes at various speeds.
At the production facilities of the GOK, a dump car was also tested for its ability to automatically unload with maximum filling of the body with moldboard. During the tests, the stresses arising in the attachment points on the frame and sides of the car were also recorded.
The dump car is loaded with an excavator, and it unloads itself automatically. According to Vitaly Mikhailov, the speed of automatic unloading of the model 33-7141 dump car is even higher than that of similar equipment currently operating at the GOK. And in terms of other functional characteristics, the car is not inferior to analogues.
“One of the most interesting stages of testing a dump car was the“ falling block ”test, - said Vitaly Valerievich. - A 300 mm thick layer of fine rock was preliminarily poured into the bottom of the car body. Then a block of rock weighing about three tons was dropped into the body from a height of three meters. This is how the body's resistance to deformation is checked. "
In general, at the Poltava mining and processing plant, the dump car successfully passed the test. Now he was taken to the KVSZ, where the final checks will be carried out. A prototype dump car will be loaded with crushed stone and impact tests will be carried out at a special "slide" stand on the territory of the test center to identify critical shock stresses. They occur when the car is lowered from the hump.
Scientists will analyze the data obtained during the complex tests of the dump car. Based on the analysis results, test reports will be drawn up. On their basis, the interdepartmental commission will decide on the provision of permits for the serial production of dump cars.