FIELD: motors and pumps.
SUBSTANCE: inventions relate to extended pump assembling method and system. The pump is provided with a multiple set of stages within the external housing limits. The housing consists of two thread-connected sections. Each stage includes impeller and diffuser. The diffusers are split into separate groups, which are compressed by the first and second elements working in compression during pump assembling. The diffusers are loaded independently in each group.
EFFECT: reduced cumulative compression loading in each group and reduced probability of axial backlash loss during stages compression.
30 cl, 5 dwg
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