FIELD: engines and pumps.
SUBSTANCE: proposed pump comprises cylindrical hollow housing accommodating shaft and set of modules. Every module comprises guide vanes and impellers fitted on the shaft with the help of thrust washers. Some of guide vanes can have wear-resistant radial-axial bearings. The latter represent a sleeve and wear-resistant axial washer fitted between aforesaid sleeve and impeller hub faces. Guide vane orifice accommodates the shaft protective sleeve arranged with the gap between its face surface and hub of impeller fitted above it. Note here that total size of gaps in every module is smaller than impeller thrust washer thickness.
EFFECT: reduced wear, simplified design and improved repairability.
1 dwg
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