Coupled to an electric traction vehicle, the three hybrid versions of the HSG-city carry out zero-emissions grinding on the Shenzhen Metro for the first time. A further advantage is that the combination only requires one operator. This enables either:
In 2015, line 6 of the Beijing Metro became the first HSG-city project in China. Although the tracks had only been opened in December of 2014, heavy traffic had already caused severe corrugations to appear on the rails – particularly in curves with small radii. Rail defects, particularly slip waves, had formed, making it necessary to grind up to 0.36 mm off the rail surface.
The applications are numerous and range from removing mill scale from newly-laid rails to noise prevention and the removal of corrugations. We achieved a reduction in noise emissions of 4 db (A), for example, on the tram line in Guangzhou.
The transition can be made from partly corrective to fully preventive maintenance after only two or three grinding campaigns. The row of grinding wheels acts like a ruler.
Now in more than 10 countries (> 300,000 km of grinding work done)
In purchasing an HSG-city, the tram network operator in the Finnish city of Tampere has gone with prevention right from the start. The network was opened for operations in the summer of 2021.
© Risto Eränen/Veho Oy Ab
A 4-db(A) reduction in the noise level was achieved in 13 passes at speeds of 18-20 km/h on a track section almost 8km long in Guangzhou.
Initial situation on the Deutsche Bahn line 4010 Mannheim – Frankfurt:
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Special characteristics of the tension clamp curve such as the second stiffness