China Railways DFH shunting locomotives
| DFH2, DFH5, DFH6, DFH7, DFH21 东方红2、东方红5、东方红6、东方红7、东方红21 | |||||||||||||||
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 DFH2 0008 | |||||||||||||||
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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.[2]
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.
China Railways standard gauge[edit]
DFH2[edit]
The DFH2 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 with a top speed of 62 km/h (39 mph).[1][img 1]
The mass was 60 t (59.1 long tons; 66.1 short tons) and the starting tractive effort was 192 kN (43,000 lbf). The locomotive used a 12V180ZL engine and SF2010 transmission.[4]
DFH5[edit]
In comparison to the DFH2 type, a number of changes were made for the DFH5: a twin-speed transmission allowing a higher top speed when running without a heavy load was included, and the mass was increased to improve traction.[3]
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.[2][img 2]
Variants, the DFH5B and DFH5C, were introduced in 1985, with modifications to improve reliability and performance – in both where 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.[3]
DFH6[edit]
One example was produced for shunting in the Chinese port of Huangpu District, Shanghai.[1]
DFH7[edit]
Four units were produced for shunting in mines and industrial environments.[1]
Metre gauge[edit]
DFH21[edit]
Locomotives similar in design to the DFH2 type but built to meter gauge and used as universal locomotives.[1][5] The locomotives were used on the Kunming metre gauge railway, including passenger services.[6][img 3]
As of 2012, Kunming rail fans report that DFH21 locomotives are still used to haul a few passenger trains a day along the metre gauge tracks from Kunming North Railway Station to several nearby stations. As of 2014[update], these trains were still in operation.[7]
30 of the locomotives are also used by Vietnam Railways, where they are known as the D10H.[8] In 2005, Vietnam railways had 20 units operational.[9] In 2009, ten of the engines had Caterpillar Inc. 3512B engines fitted as replacements.[10]
Preserved locomotives[edit]
DFH2 0008 and DFH5 0001 are both preserved at the Beijing China Railway Museum.[11]
See also[edit]
- China Railways DFH mainline locomotives, Contemporary Chinese diesel-hydraulic locomotives used primarily for passenger and freight trains
References[edit]
- ^ a b c d e f g h i j k l m n o p q r s t u v w 东方红型内燃机车, The East is Red Diesel locomotive, www.kepu.net.cn
- ^ a b c d DFH5 东方红5 Archived 2011-01-08 at the Wayback Machine, www.railwaysofchina.com
- ^ a b c 海子铁路网社区 » 中国内燃（干线） » 东方红5型(DFH5)内燃机车, (DF5 locomotive), technical drawing and description, bbs.hasea.com
- ^ 中国铁路东方红2型(DFH2)内燃机车, China Railway "Dongfang Hong" 2 (DFH2) Diesel locomotive, www.hudong.com
- ^ 中国機関車大全 液体式ディーゼル機関車編 : 東方紅２１型（ＤＦＨ２１） Archived 2012-01-18 at the Wayback Machine Chinese locomotives : diesel hydraulics, section "DFH21", www.chinarailway.jp
- ^ South China March 2005, section "Kunming meter gauge", Peter Patt, Jan Schirling, 2005, www.sy-country.co.uk
- ^ 滇越铁路徒步第一程（昆明——宜良） Archived 2012-12-30 at the Wayback Machine (A walk along the Kunming-Vietnam Railway. Part 1: Kunming-Chenggong)
- ^ Danh sách đầu máy D10H tại Việt nam, Info on D10H in Vietnam, daumaytoaxe.com
- ^ Vietnam Railways: Rolling Stock, Number of locomotives (of the year 2005), archived from the original on 13 January 2011
- ^ Vòng quanh các xí nghiệp đầu máy ở VN, Tour of railway factories in Vietnam, p.16, daumaytoaxe.com
- ^ Preserved Locomotives Archived 2011-07-15 at the Wayback Machine, www.railwaysofchina.com
Images[edit]
- ^ 新闻资料：东方红型内燃机车 Archived 2011-07-23 at the Wayback Machine, Dongfang Hong (The east is red) types 2 and 3 museum images, news.workercn.cn
- ^ 新闻资料：东方红型内燃机车 Archived 2011-07-23 at the Wayback Machine, Dongfang Hong (The east is red) type 5, museum images and technical details, news.workercn.cn
- ^ DFH21 Images via www.flickr.com
External links[edit]
- ☆中国鉄道博物館 車両図録☆ Railway museum Beijing, diesel hydraulic gallery, www.geocities.jp
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