Assembly unit for multi-row radial piston engine - has slave rows centred during assembly by positioning piston to set spring pressures

摘要

The assembly equipment for multi-row radial piston engines with variable output is for engines with pistons sliding on inside of guide rings whose eccentricity is determined by the pressure balance between the set and variable positioning units. Set unit uses spring plus fluid pressure. The first row variable unit has a conventional servo varying fluid pressure in a chamber with a positioning piston connected to corresponding chambers for other rows. These have a co-axial threaded spindle with a collar and spring arrangement so that the reference position of a flanged sleeve bearing against the positioning piston can be adjusted. During assembly, this is used to centre guide rings, with spring pressure in the variable unit then about twice that in the set unit.