SCRAPER ELEVATOR POWER CHAIN TENSIONING DEVICE

摘要

A chain tensioning device, especially for scraper elevators, in which the distance between the head and foot shafts of the elevator is power adjusted to obtain the proper chain tension. A pressure source delivering a relatively constant supply of low pressure hydraulic fluid, such as the charging circuit of a hydrostatic elevator drive, is used to static load a cylinder against the desired catenary loading under idle conditions to retension the chains.