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Thrust Chamber with Hydrodynamic Bearings for Horizontal Pumping System

IP.com Disclosure Number: IPCOM000250016D
Publication Date: 2017-May-16
Document File: 2 page(s) / 235K

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure relates to a thrust chamber that may be used in horizontal pumping systems.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 56% of the total text.

1

Thrust Chamber with Hydrodynamic Bearings for Horizontal Pumping System

This disclosure relates to a thrust chamber that may be used in horizontal pumping systems. The

thrust chamber supports the axial load from the pump shaft pushed by hydraulic forces backward

to the flow direction. Known designs of thrust chambers utilize ball or roller bearings (see, e.g.,

US 5,667,314; US 7,104,766). The present design contains hydrodynamic radial and thrust

bearings that supports the shaft that feels radial and axial loads. The hydrodynamic bearings have

longer run life than ball bearings that suffer from pitting and fatigue failures. The proposed design

includes inducer and flow passages in the runner to improve oil circulation and cooling of runner

and thrust bearings. The spacer between thrust bearings make the assembly easier and helps to

maintain more accurate clearance between runner and thrust bearings.

The thrust chamber includes shaft 1 that has runner 6, spiral inducer 12 and bearing sleeves 10

installed on it with keys 20 and 21 preventing them from rotation. The thrust chamber is pre-filled

with lubricant (synthetic, mineral oil). Runner 6 has axial and radial holes for lubricant circulation

flow created by spiral inducer 12. The shaft assembly is installed through housing 2, covers 3 and

4 and spool 13. Each cover 3 and 4 has bearing bushing 10 pressed in it. The tilting-pad thrust

bearing 8 is installed in the housing 2 on the flat surface and fixed by pin from rotation...