| 摘要 |
FIELD: transport.SUBSTANCE: rotary support comprises fixed and rotary parts, central journal, roller separator with cylindrical rollers and guide circular rail. Rollers are shaped to truncated cones with their larger diameter located at outer side, relative to journal, their axles being located at crane rotary part. Roller OD-to-ID ratio is selected provided that peripheral speeds of roller outer and inner parts are equal and defined by the formula: D/D=(2R+b)/(2R-b), where Dand Dare roller OD and ID, R is circular rail radius, b is roller width. Roller support-and-guidance rail can have horizontal bearing surface inclined toward journal outer side.EFFECT: reduced roller, guide rail and journal wear, decreased electric power consumption.3 cl, 2 dwg |
