Mine Contra-Rotating Auxiliary Fan Unit D630 - Development

Developed in-house for auxiliary ventilation of coal mine development headings: a D630 two-stage contra-rotating auxiliary fan unit supplied with a 600 mm gauge rail-wheel chassis so the whole unit can be moved along the underground roadway.

Main parameters

• Impellers: Ø630 mm two-stage contra-rotating, 7 + 6 blades, plus/minus 2930 r/min
• Air volume: 7.5 m³/s
• Total pressure: 4000 Pa  |  Efficiency: 87%
• Drive: 2 x 18.5 kW motors, direct shaft-head drive, narrow hub with no inter-stage barrel
• Impeller material: 6061 / A356 cast aluminium, or Q345 steel plate press-formed and welded on both sides
• Explosion-proof features: two H62 brass wear rings, tip clearance 1.5-2 mm per side
• Unit weight: approx. 947 kg with cast aluminium impellers

Forced duct air delivery distance

• Ø800 duct: 600-800 m steady, up to 1000 m
• Ø600 duct: 250-300 m steady

Supplied as a unit with the rail-wheel chassis at 600 mm gauge for mechanised transport in underground roadways.