CR series DF4
| DF4 | |
|---|---|
 The first DF4 in the Beijing Railway Museum
|
|
| Year of construction (s): | from 1969 |
| Axis formula : | Co'Co ' |
| Gauge : | 1435 mm ( standard gauge ) |
| Length: | 21,100 mm |
| Service mass: | 138 t |
| Wheel set mass : | 23 t |
| Top speed: | 100 km / h or 120 km / h depending on the gear ratio |
| Installed capacity: | 2648 kW / 3600 PS |
| Starting tractive effort: | 338 kN |
| Motor type: | 16-240-Z |
| Motor type: | 4-stroke sixteen-cylinder |
| Power transmission: | diesel-electric |
| Data based on type DF4 from 1969 | |
The CR series DF4 is a diesel-electric locomotive from China Railways , which has been manufactured in different versions since 1969 and is the Chinese standard diesel locomotive with over 5000 machines produced.
history
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Production of diesel locomotives in China began in the 1960s. Initially, support was received from the Soviet Union , but Chinese locomotive manufacturers soon began to produce their own designs.
Construction of the DF4 began in Dalian in 1969 . The abbreviation DF stands for Dongfeng , in German east wind . 108 locomotives were produced by 1976, then the number of built locomotives increased to 450 by 1981 and to 660 by 1984.
The change in traction from steam to diesel resulted in an increased demand for diesel locomotives, which was covered by large-scale production of the DF4B. 1,700 locomotives were built in Dalian within ten years. In addition, production of the DF4 was expanded to other locations: 1,500 units were manufactured in Ziyang and around 500 in Datong . Some machines were also built in Sifang . At the beginning of the 1990s, DF4 locomotives could be found on the entire Chinese route network.
The first prototype was produced in 1985 to further develop the successful DF4B. Nevertheless, it was not until 1991 that series production of the DF4C could begin. The angular locomotive body compared to the previous locomotives is striking . Initially, DF4B and DF4C locomotives were both labeled as DF4 without mentioning the letter. As a result, when some DF4C locomotives were delivered, the curiosity arose that the four-digit vehicle number requested had already been assigned to another DF4 locomotive.
The first DF4D locomotive for passenger transport followed in 1996, which has a more powerful diesel engine with an output of 4000 hp and a top speed of 145 km / h. Some locomotives are even approved for 170 km / h, these machines are called DF4DK. In 1998 the version of the DF4D for freight traffic followed, which still had a top speed of 100 km / h.
In 2002 some DF4D were delivered to North Korea by the manufacturer China CNR Corporation to the Korean State Railways . The maximum speed of the North Korean variant is 100 km / h. The machines designated as CKD4A are used in front of freight trains and passenger trains on main lines.
The first construction series of the DF4 has meanwhile been retired, the remaining DF4 locomotives are still used throughout China. Some decommissioned locomotives came to North Korea.
technology
Even if the DF4 series locomotives are reminiscent of the Soviet LTS M62 , the technology is largely borrowed from American and European locomotive construction. The bogies are based on the Henschel NY5, a locomotive that was imported in 1966.
The top speed of the first locomotives was 100 km / h, as the DF4 was originally designed as a locomotive for freight traffic . Since the average speed of Chinese passenger train traffic was very low in the 1960s and 1970s, China Railways also used locomotives before passenger trains. This resulted in a small series with a gearbox that allowed 120 km / h, then a large series of 600 DF4B equipped with this gearbox.
A single sixteen-cylinder diesel engine with a piston diameter of 240 mm is used for the drive , which in the machines manufactured up to the year 2000 supplies the energy for six direct current traction motors via a three-phase generator and a rectifier . In newer versions of the DF4, AC motors are used instead of DC machines. Support was obtained from Siemens for the conversion from direct current to alternating current technology . Siemens supported the Dalian locomotive factory in the development of prototypes and supplied the necessary IGBT converters .
Web links
Individual evidence
- ↑ a b c d e f g h i Railography: Class Profiles: DF4, DF4A, DF4B Class Co'-Co 'DE. In: www.railography.co.uk. Retrieved March 19, 2016 .
- ^ A b Zhenhua Chen, Kingsley E. Haynes: Chinese Railways in the Era of High-Speed. Emerald Group, Bingley 2015, ISBN 978-1-78441-985-1 .
- ^ A b Brian Hollingsworth, Arthur F. Cook: Das Handbuch der Lokomotiven , Weltbild Verlag, Augsburg 1996, ISBN 3-86047-138-4 , p. 374.
- ↑ Railography: Class Profiles: DF4C Class Co'-Co 'DE. In: www.railography.co.uk. Retrieved March 20, 2016 .
- ↑ Railography: Class Profiles: DF4D Class Co'-Co 'DE. In: www.railography.co.uk. Retrieved March 20, 2016 .
- ↑ Type CKD4A Diesel Loco for North Korea ( Memento of the original from July 11, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . English version of the China CNR Corporation website. Retrieved July 11, 2016.
- ↑ DVV Media UK: AC diesels roll out. In: Railway Gazette. Retrieved March 20, 2016 .
