| 摘要 |
<p>M.A.N. Maschinenfabrik Augsbura-N?rnberg Aktiengeselischaft N?rnberg, December 20, 1983 A B S T R A C T ============================= Instead of teeth or similar cutting or loosening means, oscillating nozzles are arranged on the outer back and the outer side walls of the buckets of the bucketwheel of a bucketwheel excavator, said nozzles being capable of being supplied with liquid, in particular water, at high pressure. These nozzles enable the excavator to strip or mine deposits of high hardness and strength as well as highly abrasive deposits with reduced outage periods and reduced force required for digging as well as lower capital costs and operating costs. - In addition to the oscillating nozzles, fixed nozzles may additionally be provided which produce cuts in the material to be excavated whereby the formation of large lumps is prevented.</p> |
