Focus on Coal
Preventing wear on coal handling conveyors
Split bearing units used on underground coal handling conveyors are preventing premature wear.
Las unidades de cojinete seccional utilizadas en las cintas transportadoras de manipulado de carbón bajo tierra evitan el desgaste prematuro.
Geteilte Lagerungseinheiten an Kohleförderern unter Tage vermeiden vorzeitigen Verschleiß.
T
he UK’s Hatfield Colliery reopened in May 2006, by accessing 27 million tonnes of high quality reserves in the Barnsley seam, and Longwall coal face production
has resumed that has created jobs for over 300 mineworkers and a guaranteed coal supply for electricity generators. Te mine has known reserves of 100 million tons, and weekly output is around 45,000 tonnes, producing annually over two million tonnes. Reopening of the mine was a major
undertaking, involving substantial investment, which when a clean coal power station is built adjacent to the mine, could exceed £2.6 billion. One of the investments in the first stage of the reopening, were the large conveyor systems for handling in excess of 2 million tonnes of coal per year, supplied by Continental Conveyor of Sunderland.
Tese conveyors are equipped with Revolvo’s SRB split bearings – Heavy Duty 240mm units on the main pulleys, with Medium Series 110 mm units on the tail pulleys. All of these SRB split roller bearings were manufactured with bored pocket precision brass cages as standard; meaning that they can be used underground without any modification.
Tis high material specification of the
standard SRB bearings was a major factor in their specification; equally important were the bearings ease of maintenance – particularly important in the cramped conditions underground – and their superior sealing systems. SRB split roller bearings are much easier to fit and replace than solid bearings: fitting a SRB split roller bearing takes just 10 per cent to 15 per cent of the time required to fit a typical solid bearing. As a result, SRB split roller bearings reduce downtime substantially.
Fig. 1. Large conveyor systems for handling in excess of 2 million tonnes of coal per year.
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