DEVICE FOR CENTRALLY GUIDING THE WORKING PISTON IN THE WORKING CYLINDERS OF HIGH-PRESSURE COMPRESSORS OR PUMPS

摘要

A device for centrally guiding the working piston in the working cylinders of high-pressure compressors or pumps, wherein the faces of the working cylinders are releasably fitted to a lantern which is fixedly or releasably connected to the drive frame, and the working pistons are releasably fitted to the guide pistons which are guided inside the lantern and are connected to the crosshead via a fixedly fitted flexible stem. An intermediate piece with a flexible stem is centrally inserted in a co-axial bore inside the guide piston between the working piston and the supporting surface at the base of the bore. After the working piston has been fitted it is bought into non-positive connection with the guide piston in the supporting surfaces. When any axial departure occurs as a result of the oblique position of the guide piston the reaction force acting on the working piston, while it is moving longitudinally inside the bore of the working cylinder, is reduced to such an extent that said force is very largely prevented from having any detrimental effect on the sealing and guiding parts inside the working cylinder or on the working piston itself.