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It is understood that the first electric transmission heavy rail car developed by China North Locomotive and Rolling Stock Industry Corporation Yongji Motor Factory is manufactured by the Qinghai-Tibet Railway Project Department of China Railway 12th Bureau Group, mainly used for Qinghai-Tibet Railway construction and line maintenance traction operation. . The vehicle design adopts advanced design concepts and mature technologies of trunk locomotives, such as standardized cabs, rolling bearings, mature bogie technology, unit brakes, etc., to ensure the vehicle has excellent performance and is adopted for the first time in China. The electric drive mode. In order to adapt to the characteristics of high altitude, lack of oxygen and low air pressure of the Qinghai-Tibet Railway, the plant has carried out more than 20 modifications to the electric transmission heavy rail car, adding toilets, oxygen generators, anti-UV glass, electric heaters, etc. In the performance test, the top speed reached the first in the country, reaching 133 kilometers.
With the implementation of China Railway's Medium and Long-term Railway Network Planning and the development of railway leaps and bounds, high-speed and heavy-duty have become the main features of railway development. This transportation condition has intensified the deformation of the track structure, making the contradiction between line transportation and maintenance more serious. Therefore, only the development of a heavy rail car suitable for towing large road maintenance machinery can shorten the line maintenance time and improve the line maintenance quality and construction efficiency.
In the past, the transmission mode of heavy rail cars in China's railway market mainly consisted of mechanical transmission and hydraulic transmission, and the maximum speed was no more than 100 kilometers per hour.
Yongji Motor Factory, which has nearly 40 years of experience in traction electric drive manufacturing technology, issued a 470 kW high-power electric transmission heavy-duty railcar with a suitable altitude of 4,000 meters above sea level on July 1, 2004, with a design speed of 120 kilometers per hour.
After more than a year of factory line trial operation, the car has officially tested conditions. In August 2005, it passed the technical review of the Ministry of Railways. In November, the Institute of Iron and Steel Institute conducted a four-day comprehensive performance test on dynamics, traction and braking at the Nantong Pu Line from the Taiyuan Line of the Taiyuan Railway Bureau to the second time. The maximum speed reached 133 kilometers per hour. After passing the test, DCD470-001 electric transmission heavy rail car was incorporated into Taiyuan Works Section, and the trucks carrying heavy loads were industrially evaluated in the Taiyuan Works Section. The maximum towing weight reached 360 tons and the maximum running speed was 100 kilometers per hour. The maximum slope of the line was 33%. On April 25, 2006, the 5,000-kilometer operation assessment was successfully completed, and the vehicle inspection was carried out by the quality inspection center of the Ministry of Railways. On June 22nd, the Science and Technology Department of the Ministry of Railways organized a technical review meeting for the DCD 470 electric transmission heavy rail car in Beijing. Experts from the Ministry of Railways Transportation Bureau, the Institute of Iron and Steel, Shanghai, Beijing Railway Bureau, Southwest Jiaotong University, etc. agreed to the vehicle. Prepare for mass production through technical review.
With the first heavy-duty railcar "debut" on the Qinghai-Tibet Railway, Yongji Motor Factory has accelerated the pace of research and development of products in this market. The 1000 kW and 360 kW railcars have passed the design review. The GCD-1000 heavy rail car passed the technical review of the Ministry of Railways and has now entered the prototype manufacturing. It marks a major step forward in China's vehicle system integration and vehicle body manufacturing capabilities.
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