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Fluid pump

A technology of fluid pumps and fluid passages, applied in pumps, drive pumps, non-variable pumps, etc., can solve problems such as long transfer time, achieve the effects of reducing wear, reducing load, and speeding up filling time

Active Publication Date: 2013-09-25
HALE PRODS EURO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this has the disadvantage that the pump is not filled from the negative pressure area, which leads to relatively long transfer times

Method used

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  • Fluid pump
  • Fluid pump
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Examples

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Embodiment Construction

[0026] see Figures 1 to 3 , the first embodiment of the present invention provides a dual pressure water pump 10 comprising a pump body 12, a fluid inlet (generally shown at 14), a first low pressure impeller 16, a second high pressure impeller 18, a pump filling system 20, a pump filling Note conduit 22 and rear wear ring 24.

[0027] The pump body 12 is bolted to a pump bearing housing 26 with a pump motor (not shown) provided for driving a pump shaft 28 which is connected to the impellers 16 , 18 .

[0028] The low pressure impeller 16 is provided within a first impeller cavity 30 defined by the pump body 12 . The high pressure impeller 18 is provided within the second impeller cavity 32 of the impeller pocket 34 formed by the pump body 12 and the cover plate 36 . The high pressure impeller 18 fits snugly within the impeller pocket 34 .

[0029] The surfaces 34a, 36a of the high pressure impeller facing the impeller pocket 34 and cover plate 36 have water flow passages ...

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PUM

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Abstract

A dual pressure water pump 10 comprising a pump body 12, a low pressure impeller 16, a high pressure impeller 18, a pump priming system 20, a pump priming conduit 22 and a rear wear ring 24. The high pressure impeller 18 is provided within a cavity 32, defined by an impeller recess 34 and a cover plate 36. The rear wear ring 24 is provided between the low pressure impeller 16 and the inboard end of the cover plate 36. The pump priming conduit 22 comprises: first and second axial bores 42, 44 through the pump body 12; a radial bore 46 and two axial holes 48, 50 through the cover plate 36; an axial hole 52 through the rear wear ring 24; a cavity 54 between the rear wear ring 24 and the low pressure impeller 16; and axial holes 56 through the low pressure impeller 16, connecting the cavity 54 to the suction side of the low pressure impeller 16.

Description

technical field [0001] The present invention relates to a fluid pump with a pump priming system. Background technique [0002] Most existing water pumps are primed by drawing air from the pump through the top of the pump suction tube. This has historically been seen as the best position from which to prime the pump for priming, as it is very close to the centerline of the pump, and thus away from the pressure side of the impeller, where the water is centrifuged. However, when the pump is partially charged with part water and part air, there is a tendency that the water entering the suction pipe starts to rotate due to the action of the impeller. The water then tends to enter the filling port, with some residual air, causing it to pass through the filling system, thus reducing its efficiency. Afterwards, it extends the "transfer" time during which water enters the pump and the pump builds up pressure, and sometimes results in unacceptably large amounts of water passing thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D9/00
CPCF04D9/006
Inventor 柯林·托马斯·朋费特
Owner HALE PRODS EURO LTD
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