Lubricating systems for regenerative vacuum pumps

• US 20030000772A1
• Filed: 06/07/2002
• Published: 01/02/2003
• Est. Priority Date: 06/13/2001
• Status: Abandoned Application

• Current Assignee: BOC Group BV (Linde Plc)
• Original Assignee: BOC Group BV (Linde Plc)
• Inventors: Stones, Ian David
• Application Number:
  US10/164,795
• Publication Number:
  US 20030000772A1
• Time in Patent Office: Days
• US Class Current: 184/6.18
• CPC Class Codes: F04D 17/168 Pumps specially adapted to produce a vacuum
• CPC Class Codes: F04D 23/008 Regenerative pumps for liquids or for liquids and elastic fluids F04D5/002
• CPC Class Codes: F04D 29/063 specially adapted for elastic fluid pumps

Abstract

In a vacuum pump of the regenerative type or including a regenerative section in which a rotatable substantially vertical shaft is supported by upper and lower bearings, a lubricating system for lubricating the bearings comprising an axial bore extending along the shaft and in communication with radial holes aligned respectively with the lower bearing and the upper bearing, the lower open end of the axial bore extending in to a shaft reservoir containing lubricating fluid, and in which the radial holes in alignment with the lower bearing are formed in a tapered surface of the axial bore

Claims

1. In a vacuum pump of the regenerative type or including a regenerative section in which a rotatable substantially vertical shaft is supported by upper and lower bearings, a lubricating system for lubricating the bearings comprising an axial bore extending along the shaft and in communication with radial holes aligned respectively with the lower bearing and the upper bearing, the lower open end of the axial bore extending in to a shaft reservoir containing lubricating fluid, and in which the radial holes in alignment with the lower bearing are formed in a tapered surface of the axial bore.

2. In a vacuum pump of the regenerative type or including a regenerative section in which a rotatable substantially vertical shaft is supported by upper and lower bearings, a lubricating system for lubricating the bearings comprising an axial bore extending along the shaft and in communication with radial holes aligned respectively with the lower bearing and the upper bearing, the lower open end of the axial bore extending in to a shaft reservoir containing lubricating fluid, and in which the radial holes in alignment with the lower bearing are formed in a tapered surface of the axial bore and lower bearings, a lubricating system constructed and arranged substantially as hereinbefore described with reference to FIG. 4 of the accompanying drawings.