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China Railways DFH5

DFH2 , DFH5 , DFH6 , DFH7 , DFH21
China Railways DFH2 0008 20111007.jpg
DFH2 0008
Type and origin
Power type Diesel-hydraulic
Builder DFH2, DFH5, DFH6, DFH7 Ziyang locomotive works
DFH2, DFH5, DFH21 Sifang locomotive works
Build date DFH2 1973
DFH5 1976-1988
DFH6 1981
DFH7 1988
DFH21 1977 (prototype), 1982
Total produced DFH2 ?
DFH5 >500
DFH6 1
DFH7 4
DFH21 >29
Specifications
UIC class B'B'
Gauge 1,435 mm (4 ft 8 12 in)
DFH21 1,000 mm (3 ft 3 38 in)
Minimum curve (?)
Length DFH2 12.400 m (40 ft 8.2 in)
DFH5 13.700 m (44 ft 11.4 in)
DFH6 ?
DFH7 ?
DFH21 12.000 m (39 ft 4.4 in)
Transmission Hydraulic
Performance figures
Maximum speed DFH2 62 km/h (39 mph)
DFH5 40 km/h (25 mph)
DFH6 ?
DFH7 ?
DFH21 50 km/h (31 mph)
Power output DFH2 650 kW (870 hp)
DFH5 790 kW (1,060 hp)
DFH6 1,740 kW (2,330 hp)
DFH7 790 kW (1,060 hp)
DFH21 640 kW (860 hp)
Career
Operators China Railways DFH2, DFH5, DFH6, DFH7, DFH21
Vietnam Railways DF10H
Type and origin
Power type Diesel-hydraulic
Builder DFH2, DFH5, DFH6, DFH7 Ziyang locomotive works
DFH2, DFH5, DFH21 Sifang locomotive works
Build date DFH2 1973
DFH5 1976-1988
DFH6 1981
DFH7 1988
DFH21 1977 (prototype), 1982
Total produced DFH2 ?
DFH5 >500
DFH6 1
DFH7 4
DFH21 >29
Specifications
UIC class B'B'
Gauge 1,435 mm (4 ft 8 12 in)
DFH21 1,000 mm (3 ft 3 38 in)
Minimum curve (?)
Length DFH2 12.400 m (40 ft 8.2 in)
DFH5 13.700 m (44 ft 11.4 in)
DFH6 ?
DFH7 ?
DFH21 12.000 m (39 ft 4.4 in)
Transmission Hydraulic
Performance figures
Maximum speed DFH2 62 km/h (39 mph)
DFH5 40 km/h (25 mph)
DFH6 ?
DFH7 ?
DFH21 50 km/h (31 mph)
Power output DFH2 650 kW (870 hp)
DFH5 790 kW (1,060 hp)
DFH6 1,740 kW (2,330 hp)
DFH7 790 kW (1,060 hp)
DFH21 640 kW (860 hp)
Career
Operators China Railways DFH2, DFH5, DFH6, DFH7, DFH21
Vietnam Railways DF10H

The China Railways "Dongfang Hong" diesel-hydraulic locomotive classes DFH2, DFH5, DFH6 and DFH7 built from the 1970s to 1990s were all used as shunters on the Chinese railway network.

The use of diesel-hydraulic shunters has fallen out of favour on the Chinese rail network, with diesel-electric locomotives being used, however diesel-hydraulic machines continued to be produced for industrial railways - mainly the China Railways GK classes.

The DFH21 class is a meter gauge version of the DFH2, and was used on the Yunnan–Vietnam Railway for both passenger and freight services; the same machines are used on the Vietnam Railways where they are known as the D10H.

The DHF2 was originally designed by Sifang locomotive works in 1966 as a passenger locomotive of rated power 1,470 kW (1,970 hp), the design did not enter mass production, but in 1973 the design was changed at Ziyang locomotive works to a 650 kW (870 hp) power locomotive of top speed 62 km/h (39 mph).

The mass was 60 t (59.1 long tons; 66.1 short tons) and starting tractive effort 192 kN (43,000 lbf). The locomotive used a 12V180ZL engine and SF2010 transmission.

In comparison to the DFH2 type a number of changes were made for the DFH5; a twin speed transmission allowing a higher topspeed when running without a heavy load was included, the mass was increased to improve traction.

The DFH5 class was produced in large quantities, the engine was a 12V180ZJ and transmission ZJ2011, producing 278 kN (62,000 lbf) of tractive effort with a mass of 86 t (84.6 long tons; 94.8 short tons) and with a top speed of 40 km/h (25 mph). A higher speed was available with a limit of 80 km/h (50 mph) and tractive effort reduced to approximately half.

Variants were produced introduced 1985, with modififactions to improve reliability and performance; the DFH5B and DFH5C, in both the rated power was increased to 920 kW (1,230 hp), and the mass by 4 t (3.9 long tons; 4.4 short tons). DFH5C was produced for operations in metalworks.

One example was produced for shunting in the Chinese port of Huangpu District, Shanghai.


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Wikipedia

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