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The technology introduction HXD2 electric locomotive is a high-power AC drive electric locomotive designed and developed by CRRC Datong Co., Ltd. (hereinafter referred to as "CRRC Datong") for hauling 20,000t heavy-haul freight trains on Datong-Qinhuangdao Railway. In full consideration of the heavy-haul transportation and actual environment of Chinese railways, driving control characteristics and signal characteristics, the locomotive is of standardized and modular design, reflecting advanced locomotive design and manufacturing technology. This locomotive can realize the traction of a 10,000t heavy haul train by a single locomotive. It is the main model for the outward transport of 450 million tons of coal from Shanxi Province on Datong-Qinhuangdao Railway, and also serves as the main model on Watang-Rizhao Railway.
1.In full consideration of the heavy-haul transportation and actual environment of China's railway, driving control characteristics and signal characteristics, the technology introduction of HXD2 electric locomotive is of microcomputer network control with standardized and modular design. At the same time, the good toughness of the main materials of the locomotive at a low temperature of -40°C makes the locomotive more widely applicable.
2.The locomotive adopts AC-DC-AC electric drive system and 25kV/50Hz voltage system. Compared with the existing AC-DC drive locomotive, it has the advantages of wide constant power range, large shaft power, good adhesion characteristics, high power factor, small harmonic interference, low maintenance rate and whole life operation cost, safe and reliable operation, wide application scope, etc.
1.The "one rectifier and one inverter" axle control mode is adopted for the locomotive traction circuit. When the traction circuit fails, only the corresponding circuit of the faulty axle will be isolated, and only 1/8 of the traction and electric braking capacity of a locomotive will be lost.
2.For the first time in China, the driving gear is simply supported on the traction motor. This structure ensures a more rational distribution of forces, resulting in a lower failure rate for the driving gear, motor shaft, and motor bearings.
3.The foundation brake adopts tread braking mode, which features a simple structure, ease of maintenance, and low operating costs. During braking, the brake shoes clean the tread surface, promoting stable wheel-rail adhesion and helping to reduce uneven wear on the tread.
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Name |
Content |
| Performance parameter |
Drive mode |
AC-DC-AC |
| Axle arrangement |
B0-B0 |
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| Axle load |
23t/25t |
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| Maximum design speed |
120km/h |
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| Traction power at wheel rim (continuous) |
10000kW |
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| Electric braking power at wheel rim (continuous) |
10000kW |
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| Starting traction force |
Under 23t axle load：≥700kN Under 25t axle load：≥760kN |
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| Continuous traction force |
Under 23t axle load：514kN Under 25t axle load：554kN |
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| Continuous speed |
Under 23t axle load：70km/h Under 25t axle load：65km/h |
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| Speed range at constant power |
Traction Under 23t axle load：70～120km/h Under 25t axle load：65～120km/h Regenerative braking Under 23t axle load：76.6～120km/h Under 25t axle load：70.6～120km/h |
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| Maximum speed |
120km/h |
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| Power factor |
≥0.98 |
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| Structural parameters |
When the pantograph is lowered Height of pantograph pan from rail surface (new wheel) |
≤4800 mm |
| Center distance between front and rear couplers |
18975mm |
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| Vehicle body width (at handrail) |
3025mm |
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| Distance between bogie centers |
10060mm |
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| Fixed wheelbase of bogie |
2600mm |
Copyright: CRRC Datong Co., Ltd. 2016 JICPB No. 15050284Technical Support: CRRC Information Technology Co., Ltd.
