Adjusting device for an adjusting piston of a variable clearance space of a reciprocating compressor

Abstract

In order to enable a continuous adjustment of the variable clearance space (1) of a reciprocating compressor (15), a threaded spindle drive with a threaded spindle nut (10) and a threaded spindle (9) is provided as an adjusting device (7), wherein the threaded spindle nut (10) is embodied as a plastic nut (20) with internal thread (24), the plastic nut (20) is arranged with an external thread (23) on an internal thread (22) of a nut carrier (21) of the threaded spindle nut (10), and the thread height (y) of the internal thread (22) of the nut carrier (21) and the thread height (x) of the external thread (25) of the threaded spindle (9) is respectively embodied with 50 to 80% of the radial thickness (d) of the plastic nut (20) and the plastic thickness is at least 15% of the thread pitch (z1) of the internal thread (24) at least in the region of the thread flanks (26) of the internal thread (24) of the plastic nut (20).

Description

technical field [0001] The invention relates to an adjustment device for the adjustment piston of the variable clearance space of a piston compressor, the adjustment device comprises a lead screw screwed into the inner thread of the lead screw nut by an external thread and the lead screw or screw A spindle nut is arranged axially displaceable and the axially displaceable spindle nut or the axially displaceable spindle is connected to an adjusting piston, as well as a piston compressor having such an adjusting device. Background technique [0002] The adjustment of the capacity of a reciprocating compressor by means of variable clearance spaces is a simple and proven principle. Reducing and increasing the clearance volume of piston compressors by means of adjustable clearance spaces. According to the size of the clearance space (and thus the clearance volume), the rate of pressure rise and fall of the piston compressor is flattened and the amount of gas delivered is reduced....

AI Technical Summary

Problems solved by technology

However, such mechanical vibrations are generally small-amplitude and often low-frequency force fluctuations, which are superimposed by the high base load from the drive task of the screw drive

However, such conventional threaded nuts with a plastic coating are not designed and are not suitable for the high pulsating loads when adjusting the variable clearance spaces of piston compressors.

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