China Railways HXD1

The HXD1 (Chinese: 和谐1型电力机车) (also known as the DJ4) is an eight axle high power heavy freight twin unit locomotive of axle configuration Bo'Bo'+Bo'Bo'. Both the HXD1 and HXD2 double unit locomotives were designated DJ4, the HXD2 units being disambiguated DJ4-6000.^[6]

HXD1 和谐1型电力机车
HXD1-0026
Type and origin Power type Electric Builder CSR Zhuzhou Electric Locomotive, Siemens Build date 2006-2012[1] Total produced 271[2]
Specifications Configuration: ​  • UIC 2 (Bo'Bo') Gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Wheel diameter 1.250 m (49.21 in)[3] Wheelbase bogie centre distance 9 m (29 ft 6+3⁄8 in)[3] bogie axle distance 2.8 m (9 ft 2+1⁄4 in)[4] Length 35.222 m (115 ft 6+3⁄4 in)[4] Width 3.247 m (10 ft 7+7⁄8 in)[3] Loco weight 184 t (181 long tons; 203 short tons) (200 t or 200 long tons or 220 short tons[nb 1])[3] Electric system/s 25 kV 50 Hz AC Catenary[3] Current pickup(s) Pantograph Loco brake Pneumatic and dynamic[5]
Performance figures Maximum speed 120 km/h (75 mph)[3] Power output 9.6 MW (12,900 hp) (continuous)[3] Tractive effort max. 700 kN (160,000 lbf) (μ =0.39) (760 kN or 170,000 lbf[nb 1])[3] continuous 494 kN (111,000 lbf) @70 km/h (43 mph)[5] Brakeforce Dynamic: (9.6 MW or 12,900 hp maximum)[5] max.461 kN (104,000 lbf) continuous 461 to 288 kN (104,000 to 65,000 lbf) @75 to 120 km/h (47 to 75 mph)[5]
when ballasted to 25 t axleload for extra traction

The 7.34 billion Yuan order for 180 locomotives was given in 2004, with the first locomotive manufactured by November 2006.^[7][8] Production of the 180 locomotives in the class took place between 2006 and 2008.^[1][9] A second batch of 40 was delivered between 2009 and 2010.

In 2012 CSR began testing of a revised version of the locomotive, built by using higher levels of domestically sourced equipment.^[10] 50 units were delivered (1001 - 1050). Another unit (6001) was built at the end of 2012 by CSR Ziyang using Zhuzhou plans.

In 2013, CSR delivered 2 3xBo'Bo' to Shenhua Group (14.4 MW), directly derived from "normal" HXD1, but with a modernized driver cab.^[11] The same operator ordered 8 2xBo'Bo' in the first quarter 2013.^[12] These locomotives are dubbed the "Shenhua" Series.

In 2020, CRRC produced a 6xBo'Bo' for China Energy Investment the parent holding company of Shenhua Group.^[13][14] With a power output of 28.8 MW it is regarded as the worlds most powerful multi-segment electric locomotive.^[15][16] These locomotives are dubbed the "Shenhua 24" Series.^[17]

Background and design

The HXD1 locomotives are based on the Siemens' EuroSprinter derived design of the China Railways DJ1 locomotive.^[3]

Construction of the locomotives was carried out by Zhuzhou Electric Locomotive Company Limited. Most variants of the locomotive consists of two identical single cab Bo'Bo' units coupled together, the main locomotive body is load bearing, electric traction equipment uses an AC/DC-AC transmission chain, with the traction motors being three phase asynchronous devices. The electrical inverter for traction motor power control is an IGBT type. The traction control system is a Siemens SIBAS32, units can also be operated in multiple using the Locotrol distributed traction control system.^[18]

The locomotive has a pneumatic disc brake, as well as being able to brake regeneratively. Standard operating speed is 70 km/h (43 mph)^[18] or 65 km/h (40 mph) when ballasted to 25 t axleload.^[4]

Operations

The locomotives were built for heavy coal trains; in particular the Datong to Qinhuangdao line (Daqin Railway).^[8] On the Daqin line the twin unit locomotives typically operate in pairs and triplets, both double headed and distributed along the train.

• 
  HXD1-0004
• 
  HXD1 at Datong–Qinhuangdao railway
• 
  On the Daqin line the HXD1, both double headed and distributed along the train.
• 
  HXD1 (1000 Series) at Suide Town
• 
  HXD1-1454 (1000 Series)
• 
  HXD1-7004 "Shenhua"(神华号)

See also

• List of locomotives in China

References

1. Yankun Hou; Paul Gong (14 October 2010), Railway equipment China, Nomura, p. 3
2. "High Power AC Electric Freight Locomotive HXD1" (PDF), www.mobility.siemens.com, Siemens, archived from the original (PDF) on 2012-03-24, retrieved 2012-03-27
3. More mega locos join the Chinese coal traction fleet Archived 2010-08-20 at the Wayback Machine, 1 August 2007, www.railwaygazette.com
4. HXD1型大功率交流传动电力机车 (HXD1-type high-power AC drive electric locomotives), CSR Zhuzhou Electric Locomotive Co., Ltd., www.gofront.com
5. Jean-Marc Allenbach, "BoBo+BoBo CR HXD1 (Spec Sheet)" (PDF), documents.epfl.ch (in French)
6. HXD2 electric locomotive news.chineserailways.com
7. 全球最大功率交流传动电力机车在湖南株洲下线 The world's largest power AC electric locomotives off the assembly line in Zhuzhou, Hunan, 9 November 2006, news.xinhuanet.com
8. Locomotives Reference List^{[permanent dead link]} Electric Double Locomotive HXD1 for Chinese Railways CR www.transportation.siemens.com
9. "Introduction: CSR Zhuzhou Electric Locomotive Co., Ltd". www.gofront.com. Archived from the original on 2009-03-03. ZELC has completed the contract of high power HXD1 AC drive 8-axle (9600kW) electric locomotives awarded by Ministry of Railway, China, which was obtained together with Siemens at the end of 2004
10. "Prototype heavy haul locomotive on test", www.railwaygazette.com, 6 June 2012
11. 神华新型八轴大功率交流电力机车上线试运行. 国务院国资委. 2013-01-17 [2013-01-15].
12. 朔黄铁路公司新购电力机车全部上线运行. 新华网河北频道. 2013-02-19 [2013-02-22]
13. 黄河流. "全球最大功率电力机车神24昨在株下线". cn.chinadaily.com.cn. Retrieved 2021-03-28.
14. "神朔铁路，24轴电力机车，厉害，厉害". xw.qq.com (in Chinese). Retrieved 2021-03-28.
15. "全球最大功率电力机车神24在中车株机下线_重载". www.sohu.com. Retrieved 2021-03-28.
16. 2020-08-04T08:16:00. "28·8 MW freight locomotive unveiled". Railway Gazette International. Retrieved 2021-03-28.{{cite web}}: CS1 maint: numeric names: authors list (link)
17. "China develops high-power electric locomotive-Ecns.cn". ECNS. Retrieved 2021-03-28.
18. "HXD1型大功率交流传动电力机车", www.gofront.com, CSR Zhuzhou Electric Locomotive Co., Ltd., archived from the original on 2012-05-21, retrieved 27 March 2012

External links

• como Complete mobility, Issue 02, June 2009, pp. 14–26, via www.mobility.siemens.com (information on early 21st century developments in rail transport in China, including HXD1)
• RAILWAY TECHNOLOGY : HXD1, brief description, documents.epfl.ch