Adjusting device for adjusting pistons of variable clearance spaces in piston compressors

Abstract

In order to allow continuous adjustment of the variable clearance space (1) of the piston compressor (15), a screw drive comprising a lead screw (9) and a lead screw nut (10) is provided as adjustment means (17) said lead screw The nut (10) is configured as a plastic nut (20) with an internal thread (24), wherein the external thread (23) of the plastic nut (20) is arranged on the internal thread of the nut bracket (21) of the lead screw nut (10) (22), and the thread height (y) of the internal thread (22) of the nut support (21) and the thread height (x) of the external thread (25) of the leading screw (9) are designed as plastic nuts respectively 50% to 80% of the radial thickness (d) of (20) and the plastic thickness is at least the internal thread (24) in the area of ​​the thread flank (26) of the internal thread (24) of the plastic nut (20) 15% of the pitch (z1).

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.

Images