Pump with turbulence inducing tab

a technology of centrifugal pumps and tabs, which is applied in the direction of positive displacement liquid engines, pump casings, swimming pools, etc., can solve the problems of prone to failure of the seal which seals the impeller drive shaft to the pump casing, prone to fouling and chemical build-up in the pump casing,

Inactive Publication Date: 2005-12-01
LOYD BUZZ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a centrifugal pump that prevents the buildup of chemical precipitates around the drive shaft seal. It includes a pump case with a forward wall, side walls, and a rearward wall, an impeller, a drive shaft, a drive shaft seal, and a tab. The tab is attached to the rearward wall of the pump case and creates sufficient turbulence to prevent the buildup of chemical precipitates around the drive shaft seal while the pump is in use."

Problems solved by technology

Centrifugal pumps used for recirculating water in water recreational apparatuses, such as spas, hot tubs, swimming pools and recirculating bathtubs, are prone to fouling and chemical build-up within the pump case.
The principal problem area is around the seal which seals the impeller drive shaft to the pump case.
Such fouling is the result of the precipitation of salts and other chemicals dissolved within the water.
Also, the seal which seals the impeller drive shaft to the pump case is prone to failure due to heat build-up at the seal.

Method used

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  • Pump with turbulence inducing tab
  • Pump with turbulence inducing tab
  • Pump with turbulence inducing tab

Examples

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Embodiment Construction

[0013] The following discussion describes in detail one embodiment of the invention and several variations of that embodiment. This discussion should not be construed, however, as limiting the invention to those particular embodiments. Practitioners skilled in the art will recognize numerous other embodiments as well.

[0014] The invention is a centrifugal pump 10 having a pump case 12 and a rotatable impeller 14 disposed therein. At least one tab 16 is defined within the pump case 12 to induce turbulence within the pump case 12 during operation of the pump 10.

[0015] As illustrated in the drawings, the pump case 12 typically consists of two portions, a forward portion 20 and a rearward portion 22. The forward portion 20 has a forward wall 24 and the rearward portion 22 has a rearward wall 26. The pump case 12 also comprises a generally circular side wall 28. The rearward wall 26 defines a drive shaft opening 30 for admitting a drive shaft 32 into the interior of the pump case 12 to ...

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PUM

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Abstract

A centrifugal pump has a pump case and a rotatable impeller disposed within the pump case. A central aperture is defined within the rearward wall of the pump case to facilitate the connection of an impeller drive shaft to the impeller. A drive shaft seal is disposed within the central aperture to seal the impeller drive shaft to the pump case. A tab is disposed within the pump case such that it protrudes away from the rearward wall of the pump case. The tab is sized, dimensioned and located so as to create sufficient turbulence proximate to the drive shaft seal to suppress the buildup of heat and chemical precipitates around the drive shaft seal.

Description

FIELD OF THE INVENTION [0001] This invention relates generally to centrifugal pumps and, more specifically, centrifugal pumps used in water recreational apparatuses. BACKGROUND OF THE INVENTION [0002] Centrifugal pumps used for recirculating water in water recreational apparatuses, such as spas, hot tubs, swimming pools and recirculating bathtubs, are prone to fouling and chemical build-up within the pump case. The principal problem area is around the seal which seals the impeller drive shaft to the pump case. Such fouling is the result of the precipitation of salts and other chemicals dissolved within the water. [0003] Also, the seal which seals the impeller drive shaft to the pump case is prone to failure due to heat build-up at the seal. [0004] Thus, there is a need for a centrifugal pump which avoids this problem in the prior art. SUMMARY OF THE INVENTION [0005] The invention satisfies this need. The invention is a centrifugal pump comprising (a) a pump case having a forward wal...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F04B17/00F04B35/04F04D7/04F04D7/06F04D29/42
CPCF04D29/426F04D7/045
InventorLOYD, BUZZ
OwnerLOYD BUZZ