Rotary fluid distributor especially for the hydraulic tool clamp at a machine tool has an expansion unit which automatically sets the sealing gap on heating while working

摘要

Rotary fluid distributor, for transfer of fluid from first static component (1) to second rotating component (2), has at least one ring groove (3) between them. First fixed component has carrier at one end, which is axially fixed in relation to second rotating component, and is held in place by at least one expansion unit (16) of a material with a greater thermal coefficient of expansion than the material of the two components. First component is set axially on heating in relation to second component, by reducing sealing gap (10-12) through greater thermal expansion of expansion unit.