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A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), however modern large hoists use alternating current drives that ...
Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
As a result, fleet angles limit how close a dead-haul drum hoist can be mounted to the head block (usually about 10 feet). A moving drum hoist, or traveling drum hoist, is a variation on the traditional drum hoist. Moving drum hoists effectively eliminate the fleet angle between drum and block by shifting the drum along its axis as it spins.
This page was last edited on 29 October 2008, at 05:56 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Counter jib: holds counterweights, hoist motor, hoist drum and the electronics. [65] Hoist winch: the hoist winch assembly consists of the hoist winch (motor, gearbox, hoist drum, hoist rope, and brakes), the hoist motor controller, and supporting components, such as the platform. Many tower cranes have transmissions with two or more speeds.
The Kintore Headframe and winding drums in Broken Hill, New South Wales The steel headframe of the Ottiliae shaft (1876) in Clausthal-Zellerfeld, the oldest existing headframe in Germany A headframe [ 1 ] ( gallows frame , [ 2 ] winding tower , [ 3 ] hoist frame , [ 3 ] pit frame , [ 3 ] shafthead frame , [ 3 ] headgear , [ 3 ] headstock ...
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