Swash or wobble plate compressors

摘要

A swash or wobble plate compressor comprises at least one piston (1) moveable in a cylinder (3) and a swash or wobble plate arrangement (8) rotatable mounted between the piston (1) and a drive shaft. An at least part-spherical bearing (6) is attached to the piston (1) against which the swash or wobble plate arrangement (8)acts to reciprocate the piston (1) in the cylinder (3). In order that the effects of wear caused by lateral forces are mitigated the centre (12, 18) of the bearing (6) is located at a position (20) offset with respect to a longitudinal plane in which both the longitudinal axis (7) of the piston (1) and a longitudinal axis (9) of a drive shaft for the piston (1) lie. This means that the centre (12,18) of the bearing (6) is offset both radially with respect to the longitudinal axis (7) the piston (1) and in a selected direction of rotation of the swash or wobble plate arrangement (8) in a compressor with respect to the piston (1).