The Mechanical Engineering of Collieries Volume 2

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...kind for this new edition, the writer's attention was drawn to the excellent examples of colliery pumping engines designed and constructed by the eminent and rising firm of Messrs. Hulme and Lund, engineers, in the heart of the great city of Manchester, and a few examples of their successful productions are now placed before the reader. The firm have had long and successful experience in machinery for mine drainage, and are fairly entitled to some special mention in any work on colliery mechanical appliances. The figures represent horizontal pumping engines, specially designed for the drainage of mines. The arrangement consists of placing a double-acting ram pump behind the steam piston, which is worked directly by continuation of the piston rod. Fig. 140 shows a pair of pumping engines supplied to the Brownlee Collieries, Lanarkshire, the rams 8 in. diameter, the stroke 24 in., and the steam cylinder 24 in. diameter, with a fly-wheel 8 ft. diameter, and they were erected to force 24,000 gallons of water per hour to a vertical height of 520 ft., running twenty-four revolutions per minute. They have proved themselves capable of working well at forty revolutions, and at that speed will deliver 40,000 gallons per hour, and are now doing this. A similar pair was supplied to the Glasgow Iron Company, to raise 30,000 gallons an hour, against a vertical column of 620 ft., and the writer had the privilege, during one of his visits to the works of Messrs. Hulme and Lund, to see under process of construction a pair which will deal with a column of 870 ft. Smaller pumping engines of the same class are now operating upon hydraulic machinery, against a pressure of 450 lb. per square inch. No better proof, and none which appeals more directly to makers' hearts, could be ...