Flexible bearing retainer for multistage centrifugal pump
AssigneeGrundfos Holding A/S
InventorBrian Lundsted Poulsen
Life of this patent
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Abstract
The present invention relates to a centrifugal pump and a bearing retainer for the centrifugal pump. The centrifugal pump has a shaft, a bearing for supporting the shaft, and a bearing retainer for the bearing. The bearing retainer comprises a ring section adapted to surround the bearing and an elastic section adjacent the ring section, wherein the elastic section comprises multiple slits, dividing the elastic section into multiple resilient parts, wherein the multiple resilient parts are adapted to receiving and supporting the bearing, thereby creating a compression force in radial direction perpendicular to the axis of the shaft, allowing the bearing retainer to hold the bearing in a fixed position with respect to the bearing retainer.
Claims18
A centrifugal pump having a shaft and a bearing for supporting said shaft, said centrifugal pump further comprising a bearing retainer (10) for said bearing, wherein said bearing retainer comprises:
- at least one ring section (2) adapted to surround said bearing, said ring section having an inner radius perpendicular to the axis of said shaft;
- at least one elastic section (4) adjacent said ring section, wherein at least a part of said elastic section has an inner radius perpendicular to the axis of said shaft, which inner radius is smaller than said radius of said ring section;
- said elastic section comprising multiple slits (6), dividing said elastic section into multiple resilient parts (8);
- said multiple resilient parts (8) being adapted to allowing receiving and supporting said bearing, thereby creating a compression force in radial direction perpendicular to the axis of said shaft, allowing said bearing retainer to hold said bearing in a fixed position with respect to said bearing retainer;
- wherein said elastic section (4) comprises an oblique subsection (17) adjacent said ring section (2), and a cylindrical subsection (18) adjacent said oblique subsection (17), wherein said oblique subsection (17) comprises a wall which is slanted with respect to the shaft of the pump, and said cylindrical subsection (18) comprises a wall which is parallel to the shaft of the pump.
A bearing retainer (10) for a bearing for supporting the shaft of a pump, said bearing retainer comprising:
- at least one ring section (2) adapted to surround the bearing, said ring section having an inner radius perpendicular to the axis of the shaft;
- at least one elastic section (4) adjacent said ring section, wherein at least a part of said elastic section has an inner radius perpendicular to the axis of the shaft, which inner radius is smaller than said radius of said ring section;
- said elastic section comprising multiple slits (6), dividing said elastic section into multiple resilient parts (8);
- said multiple resilient parts (8) being adapted to allowing receiving and supporting the bearing, thereby creating a compression force in radial direction perpendicular to the axis of the shaft, allowing said bearing retainer to hold the bearing in a fixed position with respect to said bearing retainer;
- wherein said elastic section (4) comprises an oblique subsection (17) adjacent said ring section (2), and a cylindrical subsection (18) adjacent said oblique subsection (17), wherein said oblique subsection (17) comprises a wall which is slanted with respect to the shaft of the pump, and said cylindrical subsection (18) comprises a wall which is parallel to the shaft of the pump.
Dependencies are inferred from the claim text.