Fastovets P. Increasing durability of eccentric mechanism of vibratory diggers of beet harvesters by strengthening at making and repair.

The dissertation work deals with increase in durability of an eccentric mechanism of the vibratory drive of share diggers by strengthening fixed joints at making and repair. Operating dependability of digging units with share diggers was investigated. It was established that the least life have key joints of the eccentric mechanism. A mathematical model of wear of a key joint was developed. Joint stresses were analyzed and tribological properties of contacting surfaces estimated. The method of life prediction of fixed joints of shafts with an eccentric is offered and relationships of their wear found. For reasons given, proposals were developed in relation to the life increase. They are that tolerances on the sizes of elements of parts in fixed joints are decreased, threadbare surfaces of the crack-resisting carbonaceous steel layer surfaced, and hardened with low tempering. The process of reconditioning of eccentric shafts was developed and introduced. Its efficiency is confirmed by operating tests.